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methylnitrosourea

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Description

Methylnitrosourea: A nitrosourea compound with alkylating, carcinogenic, and mutagenic properties. [Medical Subject Headings (MeSH), National Library of Medicine, extracted Dec-2023]

N-methyl-N-nitrosourea : A member of the class of N-nitrosoureas that is urea in which one of the nitrogens is substituted by methyl and nitroso groups. [Chemical Entities of Biological Interest (ChEBI), Hastings J, Owen G, Dekker A, Ennis M, Kale N, Muthukrishnan V, Turner S, Swainston N, Mendes P, Steinbeck C. (2016). ChEBI in 2016: Improved services and an expanding collection of metabolites. Nucleic Acids Res]

Cross-References

ID SourceID
PubMed CID12699
CHEMBL ID288958
CHEBI ID50102
SCHEMBL ID38377
MeSH IDM0013652

Synonyms (82)

Synonym
1-methyl-1-nitrosomocovina
o-nitroso-n-methyl-harnstoff
w8kw4e3xsu ,
unii-w8kw4e3xsu
MNU ,
NMU ,
1-methyl-1-nitrosourea
urea, 1-methyl-1-nitroso-
urea, n-methyl-n-nitroso-
1-nitroso-1-methylurea
wln: zvn1&no
methylnitroso-harnstoff
n-methyl-n-nitrosourea
n-nitroso-n-methyl-harnstoff
sri 859
n-methyl-n-nitroso-harnstoff
ski 24464
nsc-23909
684-93-5
nsc23909
n-nitroso-n-methylurea ,
methylnitrosourea
methylnitrosouree
nsc 23909
NMH ,
n-nitroso-n-methylcarbamide
methylnitrosoharnstoff
1-(aminocarbonyl)-1-methyl-2-oxohydrazine
n-nitroso-n-methyluree
CHEBI:50102 ,
n-methyl-n-nitrosocarbamide
n-methyl-n-nitrosouree
n-methyl-n-nitrosoharnstoff
n-nitroso-n-methylharnstoff
einecs 211-678-4
o-nitroso-n-methyl-harnstoff [german]
ai3-50583
rcra waste number u177
n-nitroso-n-methyl-harnstoff [german]
n-methyl-n-nitroso-harnstoff [german]
hsdb 5112
carbamide, n-methyl-n-nitroso-
methylnitroso-harnstoff [german]
1-methyl-1-nitrosomocovina [czech]
methylnitrosouree [french]
rcra waste no. u177
nmh [german]
ccris 404
n-nitroso-n-methylurea, bulk package
n-nitroso-n-methylurea, isopac(r)
urea, methylnitroso-
n-nitroso-n-methyl urea
CHEMBL288958
n-methyl n-nitrosourea
FT-0659469
cas-684-93-5
dtxsid4021006 ,
dtxcid501006
tox21_302850
NCGC00256586-01
AKOS006228360
28606-00-0
n-methyl-n-nitrosourea [iarc]
n-nitroso-n-methylurea [hsdb]
SCHEMBL38377
1-(aminocarbonyl)-1-methyl-2-oxohydrazine #
n-methyl,n-nitrosourea
n-methylnitrosourea
n-methyl-nitrosourea
n-methyl-n-nitrosurea
Q3023727
AS-31175
n-nitroso-n-methylurea (stabilized with 10% acetic acid)
AMY36707
nmu;mnu;nmh
CS-0022387
HY-34758
n-methyl-n-nitroso urea
(contains water)
EN300-19856
mnu; nmh; methyl-1-nitrosourea
Z104475776

Research Excerpts

Overview

Methylnitrosourea (MNU) is a potent carcinogen and teratogen. It is associated with central nervous system, craniofacial, skeletal, ocular, and appendicular birth defects following transplacental exposure at critical time points during development.

ExcerptReferenceRelevance
"Methylnitrosourea (MNU) is a well-known pluripotent direct-acting carcinogen. "( Early modification of c-myc, Ha-ras and p53 expressions by N-methyl-N-nitrosourea.
Antal, T; Bauer, M; Boncz, I; Budán, F; Cseh, J; Ember, I; Gobel, G; Gracza, T; Gyöngyi, Z; Nowrasteh, G; Pázsit, E; Perjési, P; Prantner, I; Varga, Z; Varjas, T,
)
1.57
"Methylnitrosourea (MNU) is a potent carcinogen and teratogen that is associated with central nervous system, craniofacial, skeletal, ocular, and appendicular birth defects following transplacental exposure at critical time points during development, and preliminary studies have suggested that nonspecific maternal immunostimulation may offer protection against development of these birth defects."( Reduced birth defects caused by maternal immune stimulation in methylnitrosourea-exposed mice: association with placental improvement.
Holladay, SD; Prater, MR; Ward, DL; Zimmerman, KL, 2004
)
2.01
"Methylnitrosourea (MNU) is a multisystem teratogen that damages proliferating cells through macromolecule alkylation and generation of reactive oxygen species (ROS). "( Role of maternal dietary antioxidant supplementation in murine placental and fetal limb development.
Holladay, SD; Keay, JM; Laudermilch, CL; Pinn, LC; Prater, MR; Zimmerman, KL,
)
1.57

Treatment

ExcerptReferenceRelevance
"When treatment with methylnitrosourea was applied at the beginning of the S phase in synchronized cells, a linear dose-response curve was obtained, whereas application of the dose after gene replication resulted in a strong reduction of the number of induced mutations."( Elimination of MNU-induced mutational lesions in V79 Chinese hamster cells.
Jenssen, D, 1982
)
0.58

Toxicity

ExcerptReferenceRelevance
"Oral administration of NMU at maximally tolerated doses of guinea-pigs from day 34 to 58 of pregnancy induced embryotoxic effects, as evidenced by a high incidence of stillbirths and reduction in birth weight, and postnatal toxic effects, as evidenced by stunting, progressive mortality and extensive fatty degeneration of the liver in F1 progeny."( Prenatal and postnatal toxicity induced in guinea-pigs by nitrosomethylurea.
Epstein, SS; Hasumi, K; Iobal, ZM, 1976
)
0.26
" Similar administration of N-nitrosomethylurethane at maximally tolerated doses did not induce such toxic effects."( Pre- and postnatal toxicity induced in guinea pigs by N-nitrosomethylurea.
Berkowitz, J; Epstein, SS; Hasumi, K; Wilber, JH; Wilber, RG, 1975
)
0.25
" Using the same protocol, six pesticides applied in dimethyl sulfoxide (DMSO) at doses of 1/8, 1/16, and 1/32 of the dermal LD50 were investigated."( Comparison of the activity of topically applied pesticides and the herbicide 2,4-D in two short-term in vivo assays of genotoxicity in the mouse.
Goldberg, MT; Hardy, MH; Schop, RN, 1990
)
0.28
" Post treatment incubation of MNU-treated HeLa cells with caffeine did not increase the toxic action of MNU."( Properties of mer- HeLa cells sensitive or resistant to the cytotoxic effects of MNU; effects on DNA synthesis and of post treatment with caffeine.
Basham, C; Roberts, JJ,
)
0.13
" Thus, the destruction of epithelial-mesenchymal interaction induced by removal of M can modulate the toxic effect of pulmonotropic carcinogens."( [Increasing the toxic effect of pulmonary carcinogens by destruction of epithelial-mesenchymal interaction in explants of embryonic respiratory tract of mice].
Kolesnichenko, TS; Medvinskiĭ, AL, 1990
)
0.28
" Qualitatively, the patterns of embryo malformations reported in treated embryos paralleled those observed in in vivo studies, especially in regard to adverse effects on central nervous system and craniofacial systems."( In vitro developmental toxicity of five direct-acting alkylating agents in rodent embryos: structure-activity patterns.
Faustman, EM; Gage, D; Kirby, Z; Varnum, M, 1989
)
0.28
" In comparison with control cells that were transfected with the parent vector, the ATase-expressing clones were considerably more resistant to the toxic effects of the methylating agents N-methyl-N-nitrosourea and methylmethanesulphonate or the chloroethylating agents Mz or taurine chloroethylnitrosourea, but unchanged in their susceptibility to the bis-chloroethylating agent nitrogen mustard."( Transfection of murine multi-potent haemopoietic stem cells with an E. coli DNA alkyltransferase gene confers resistance to the toxic effects of alkylating agents.
Dexter, TM; Jelinek, J; Kleibl, K; Margison, GP, 1988
)
0.27
" Thus, the mechanisms by which nicotinamide and thymidine protect against the toxic effects of STZ or ALX appear different."( Mechanisms of nicotinamide and thymidine protection from alloxan and streptozocin toxicity.
Forbes, PM; Hall, CR; LeDoux, SP; Patton, NJ; Wilson, GL, 1988
)
0.27
" According to median lethalities, all three known carcinogens were substantially more toxic than nitrosocimetidine whether administered by the intravenous, intraperitoneal, or oral routes."( Comparison of the acute toxicity of N-nitrosocimetidine with three structurally related carcinogens in the rat.
Hard, GC; Jensen, DE; Magee, PN; Ogiu, T, 1986
)
0.27
" GOE1734 proved to be ineffective in transplanted Yoshida sarcoma and Walker 256 carcinosarcoma when single or multiple doses were administered at dose levels that were moderately toxic or not toxic."( Synthesis, toxicity, and therapeutic efficacy of 4-amino-N-(2'-aminophenyl)-benzamide: a new compound preferentially active in slowly growing tumors.
Berger, MR; Bischoff, H; Fritschi, E; Henne, T; Herrmann, M; Pool, BL; Satzinger, G; Schmähl, D; Weiershausen, U, 1985
)
0.27
"Pretreatment of H4 (rat hepatoma) cells for 48 hr with low nontoxic doses of alkylating agents [methyl methanesulfonate (MMS), N-methyl-N'-nitro-N-nitrosoguanidine (MNNG), and N-methyl-N-nitrosourea] renders the cells more resistant to the toxic effect of these compounds."( Adaptive response in mammalian cells: crossreactivity of different pretreatments on cytotoxicity as contrasted to mutagenicity.
Laval, F; Laval, J, 1984
)
0.27
"The toxic and mutagenic effects of the alkylating agents methylnitrosourea (MNU) and methylnitronitrosoguanidine (MNNG) and of the frameshift mutagen, ICR-191 were compared among 3 human diploid lymphoblast lines, MIT-2, WI-L2 and GM 130."( Comparison of toxicity and mutagenicity of methylnitrosourea, methylnitronitrosoguanidine and ICR-191 among human lymphoblast lines.
Andon, BM; Slapikoff, SA; Thilly, WG, 1980
)
0.77
" Our observations lend support to the idea of a specific role for DNA adducts in defining MNU's toxic effects on cell viability and differentiation."( Modulation of nitrosourea toxicity in rodent embryonic cells by O6-benzylguanine, a depletor of O6-methylguanine-DNA methyltransferase.
Faustman, EM; Kidney, JK, 1995
)
0.29
"Escherichia coli can ameliorate the toxic effects of alkylating agents either by preventing DNA alkylation or by repairing DNA alkylation damage."( The Escherichia coli AlkB protein protects human cells against alkylation-induced toxicity.
Carroll, P; Chen, BJ; Samson, L, 1994
)
0.29
" Furthermore, a "virtually safe dose" was established by means of the NOAEL risk factor approach (e."( Embryotoxicity induced by alkylating agents: 7. Low dose prenatal-toxic risk estimation based on NOAEL risk factor approach, dose-response relationships, and DNA adducts using methylnitrosourea as a model compound.
Bochert, G; Meister, R; Neubert, D; Platzek, T, 1993
)
0.48
"We studied the toxic effects of cyclophosphamide and methyl-N-nitrosourea in cultured quail embryos when injected into the albumen and the subembryonic liquid, respectively."( Toxic effects of cyclophosphamide and methylnitrosourea in Japanese quail embryos depend on the route of administration.
Hellmann, R; Kaltner, H; Wittmann, J; Zickert, D,
)
0.4
", no adverse effect level (NOAEL) and lowest observed adverse effect level (LAOEL)."( Embryotoxicity induced by alkylating agents: 10. Analysis of the combined teratogenic effects of methylnitrosourea and ethylmethanesulfonate in mice.
Bochert, G; Platzek, T, 1995
)
0.51
" Uridine uptake was always inhibited at lower concentrations than those required in the neutral red assay, suggesting that the uridine uptake assay is a more sensitive indicator of toxic action than the neutral red inclusion."( Uridine uptake inhibition as a cytotoxicity test for a human hepatoma cell line (HepG2 cells): comparison with the neutral red assay.
Chagnon, M; Lhuguenot, J; Philippe, M; Valentin, I, 2001
)
0.31
"To observe the toxic effect of N-methyl-N-nitrosourea (MNU) on photoreceptor cells within retina of SD rats."( [The toxic effect of N-methyl-N- nitrosourea on retina in rats].
Chen, K; Deng, X; Hu, S; Lin, S; Yang, J, 2004
)
0.32
"The present study was carried out to elucidate the effectiveness of curcumin in mitigating the adverse effects caused by N-Methyl N-Nitrosourea (MNU) on mouse cerebellum and cerebrum."( Modulation of carbohydrate metabolism during N-methyl N-nitrosourea induced neurotoxicity in mice: role of curcumin.
Dhawan, DK; Singla, N, 2010
)
0.36

Pharmacokinetics

ExcerptReferenceRelevance
" Computer analysis of data was based on a single-compartment model using the area under the concentration-time curve (S) and the intact drug half-life (t1/2) as main pharmacokinetic parameters."( [The pharmacokinetics of the antitumor preparation of dimetinur].
Ivanov, AS; Konradov, AA; Korman, DB; Ostrovskaia, LA; Rykova, VA, 1989
)
0.28
" The results were used for computing main pharmacokinetic parameters such as logarithm of calculated initial concentration, time of half-elimination from blood, area under the kinetic curve of concentration, volume of distribution in the body and clearance."( [Pharmacokinetics of nitrosomethylurea in oncologic patients].
Gor'kov, VA; Kim, OA; Korman, DB, 1988
)
0.27
" Single administration of equimolar HePC doses results in differing pharmacokinetic values for free HePC (p."( Pharmacokinetic behavior and antineoplastic activity of liposomal hexadecylphosphocholine.
Berger, MR; Drevs, J; Eibl, H; Kaufmann-Kolle, P; Kötting, J; Marschner, N; Unger, C, 1994
)
0.29
" Data was fitted to a three-compartment model and pharmacokinetic parameters were generated using WinNonlin software."( ET(B) receptor agonist, IRL 1620, does not affect paclitaxel plasma pharmacokinetics in breast tumour bearing rats.
Gulati, A; Rai, A; Rajeshkumar, NV; Shord, S, 2005
)
0.33

Compound-Compound Interactions

ExcerptReferenceRelevance
" In the first phase, 14 patients (Group A) with progressive neurologic dysfunction following primary treatment were treated with DTIC alone (8 patients) or in combination with CCNU or methyl CCNU (6 patients) and evaluated for change in neurologic status."( Treatment of grade III and IV astrocytoma with dimethyl triazeno imidazole carboxamide (DTIC, NSC-45388) alone and in combination with CCNU (NSC-79037) or methyl CCNU (MeCCNU, NSC-95441).
Baxter, D; Cunningham, TJ; Horton, J; Nelson, L; Olson, KB; Rosenbaum, C; Sponzo, RW; Taylor, SG, 1975
)
0.25
" For suppression of carcinogenesis in vivo, 9cRA was much more potent than all-trans-retinoic acid, both as a single agent or in combination with TAM, although both retinoids had equivalent inhibitory effects on DNA synthesis in cultured human breast cancer cell lines."( Prevention of breast cancer in the rat with 9-cis-retinoic acid as a single agent and in combination with tamoxifen.
Anzano, MA; Brown, CC; Byers, SW; Mullen, LT; Peer, CW; Roberts, AB; Smith, JM; Sporn, MB, 1994
)
0.29
" Total response to DTIC used in combination with IPHN-alpha increased insignificantly: 25."( [Chemoimmunotherapy with dacarbazine and aranose combined with interferon-alpha in disseminated cutaneous melanoma].
Akimov, MA; Gershanovich, ML, 2004
)
0.32
" Our objective was to determine the effects of liarozole alone or in combination with tamoxifen on the N-methyl-N-nitrosourea (MNU)-induced rat mammary carcinoma model, as well as on the uterus in ovariectomized immature rats."( Effects of liarozole fumarate (R85246) in combination with tamoxifen on N-methyl-N-nitrosourea (MNU)-induced mammary carcinoma and uterus in the rat model.
Goss, PE; Hu, H; Qi, S; Strasser-Weippl, K, 2007
)
0.34
" In combination with tamoxifen, liarozole had neither an additive nor an antagonistic effect."( Effects of liarozole fumarate (R85246) in combination with tamoxifen on N-methyl-N-nitrosourea (MNU)-induced mammary carcinoma and uterus in the rat model.
Goss, PE; Hu, H; Qi, S; Strasser-Weippl, K, 2007
)
0.34
"Liarozole's antitumor effects on ER positive mammary tumors and its protective effect on the uterus merit further studies to confirm its clinical value in combination with tamoxifen in ER positive postmenopausal breast cancer."( Effects of liarozole fumarate (R85246) in combination with tamoxifen on N-methyl-N-nitrosourea (MNU)-induced mammary carcinoma and uterus in the rat model.
Goss, PE; Hu, H; Qi, S; Strasser-Weippl, K, 2007
)
0.34
"The rats that received celecoxib in combination with exisulind at low doses showed a significant decrease in prostatic intraepithelial neoplasia and adenocarcinomas as well as an enhanced rate of apoptosis."( Exisulind in combination with celecoxib modulates epidermal growth factor receptor, cyclooxygenase-2, and cyclin D1 against prostate carcinogenesis: in vivo evidence.
Bosland, MC; Horton, L; Narayanan, BA; Narayanan, NK; Nargi, D; Randolph, C; Reddy, BS, 2007
)
0.34
"The proposed therapeutical effect of phytol (PHY), a precursor of the phytanic acid (PHYA), on mammary tumours induced with 1-methyl-1-nitrosourea (MNU), was investigated in Sprague-Dawley rats in combination with vitamin D analogue, Seocalcitol (SEO)."( Morphology of 1-methyl-1-nitrosourea induced rat mammary tumours after treatment with precursor of phytanic acid or its combination with vitamin D analogue.
Brtko, J; Liska, J; Macejova, D; Ondkova, S, 2012
)
0.38
"No redifferentiating effect on mammary tumour cells induced by NMU after treatment with PHY alone or in combination with SEO was observed in rats."( Morphology of 1-methyl-1-nitrosourea induced rat mammary tumours after treatment with precursor of phytanic acid or its combination with vitamin D analogue.
Brtko, J; Liska, J; Macejova, D; Ondkova, S, 2012
)
0.38

Bioavailability

ExcerptReferenceRelevance
"The present study compared the effects of four lipophilic forms of selenium with regard to cancer chemopreventive activity, tissue selenium accumulation, and bioavailability for synthesis of a selenoprotein."( Activities of structurally-related lipophilic selenium compounds as cancer chemopreventive agents.
Ganther, HE; Ip, C; Lisk, DJ,
)
0.13
" As sulphamoylation of oestrogens enhances their potency and bioavailability we have synthesized 2-methoxyoestrone-3-O-sulphamate (2-MeOEMATE) and compared its ability to inhibit the proliferation of breast cancer cells with that of 2-methoxyoestrone (2-MeOE1)."( The effect of 2-methoxyoestrone-3-O-sulphamate on the growth of breast cancer cells and induced mammary tumours.
Hejaz, HA; MacCarthy-Morrogh, L; Packham, G; Potter, BV; Purohit, A; Reed, MJ; Walden, L, 2000
)
0.31
" Bioavailability studies with rats indicated that selenium in ramps was 15-28% more available for regeneration of glutathione peroxidase activity than inorganic selenium as selenite."( Tumorigenesis, metabolism, speciation, bioavailability, and tissue deposition of selenium in selenium-enriched ramps (Allium tricoccum).
Ip, C; Polan, CE; Uden, PC; Welbaum, G; Whanger, PD, 2000
)
0.31
" We also measured the activities of liver glutathione peroxidase and thioredoxin reductase as markers of selenium bioavailability in these different treatment conditions."( Chemoprevention with triphenylselenonium chloride in selenium-deficient rats.
Ganther, HE; Ip, C; Lisk, DJ,
)
0.13
"Carboxyamido-triazole (CAI) is an orally bioavailable calcium influx and signal transduction inhibitor that has been shown to be anti-invasive, anti-angiogenic and anti-metastatic in different human tumors including transitional cell carcinoma."( Carboxyamido-triazole (CAI) reverses the balance between proliferation and apoptosis in a rat bladder cancer model.
Demant, AW; Kohn, EC; Müller, SC; Perabo, FG; Schmidt, DH; Sitia, M; Wardelmann, E; Wirger, A,
)
0.13
" The bioavailability of 3,6-DHF in rats was detected by HPLC."( MicroRNA-34a and microRNA-21 play roles in the chemopreventive effects of 3,6-dihydroxyflavone on 1-methyl-1-nitrosourea-induced breast carcinogenesis.
Hongxia, X; Hui, C; Jundong, Z; Lijia, Y; Long, Y; Mantian, M; Qianyong, Z; Yong, Z; Yujie, F, 2012
)
0.38

Dosage Studied

The dose-response relationships for in vitro mutagenicity induced by methylmethanesulfonate (MMS) or methylnitrosourea (MNU) in L5178Y mouse lymphoma (ML) cells were examined.

ExcerptRelevanceReference
" With the methylating agents an early stimulation of DNA synthesis was observed, but this was depressed below the control levels at later times and with higher doses; hormone administration also resulted in a depression of DNA synthesis but, without any initial stimulation at the dosage employed."( The effect of hormone induced stress upon the extent of alkylation of rat liver nucleic acids by N-methyl-N-nitrosourea.
Craig, AW; Magin, MN; Margison, GP; O'Connor, PJ, 1975
)
0.25
"By the in vitro technic for obtaining clones of cells of murine solid tumor NKLy/LL it was demonstrated that clonogenic cells survival rate versus NNU dosage curve in the interval of 12."( [Clonogenic cell response of murine NK Ly/LL solid tumor to N-methyl-N-nitrosourea].
Afanas'ev, GG; Pelevina, II, 1979
)
0.26
" Parallel studies with HeLa cells showed a similar dose-response relationship between mutagen action and immunoreactivity."( Mutagen-induced disturbances in the DNA of human lymphocytes detected by antinucleoside antibodies.
Bases, R; Elequin, F; Kadish, A; Liebeskind, D; Mendez, F; Rubinstein, A; Wittner, D, 1979
)
0.26
" This article deals with the methods that are presently applied for dose-response studies."( Problems of dose-response studies in chemical carcinogenesis with special reference to N-nitroso compounds.
Schmähl, D, 1979
)
0.26
" These results showed that the maximum tolerated dosage of the agents administered intrarectally suppressed the development of new tumors after start of the treatment and also the growth of tumors which were detected by endoscopy before the treatment."( Cancer chemotherapy model using autochthonous large bowel cancer in rats.
Kono, K; Narisawa, T; Takahashi, T; Yamaguchi, T, 1978
)
0.26
" These predictions were in reasonably good agreement with the observed dose-response data for these agents."( Alkylation of deoxyribonucleic acid in vivo in various organs of C57BL mice by the carcinogens N-methyl-N-nitrosourea, N-ethyl-N-nitrosourea and ethyl methanesulphonate in relation to induction of thymic lymphoma. Some applications of high-pressure liquid
Frei, JV; Lawley, PD; Swenson, DH; Warren, W, 1978
)
0.26
" After 2 years of experience with 2,868 endoscopic manipulations and varying dosage schedules in 59 dogs, safe effective techniques for recurrently delivering carcinogens and sequential biopsies of the same sites have evolved."( Techniques for localized injections and topical applications of carcinogens at specific endobronchial sites in dogs.
Benfield, JR; Cohen, AH; Jensen, T; Matsumura, K; Okita, M; Shors, E, 1977
)
0.26
" Frequency and spectrum of malformations depended on the dosage and the age of pregnancy."( [Induction of malformations by N-methyl-N-nitrosourea (MNU) (author's transl))].
Rupprecht, E; Rupprecnt, U; Schneider, J; Thust, R; Warzok, R, 1977
)
0.26
"Single intrafemoral injection of NMU in the dosage of 80 mg/Kh in mice with ascites leucemia L1210 induced considerable disorders in the tumor cell cycle."( [Effect of N-nitroso-N'-methylurea on the cellular kinetics in tumors].
Frankfurt, OS; Ostrovskaia, LA, 1977
)
0.26
"As a result of transplacental exposure of rats of NMU in the dosage of 20 mg/Kg (intraperitoneally) on the 21st day of pregnancy tumors in the offspring developed in 6 to 16 females and in 10 of 17 males."( [Transplacental blastomogenic effect of N-nitrosomethylurea in rats with constant estrus].
Aleksandrov, VA; Anisimov, VN, 1976
)
0.26
" Dose-response experiments with up to 13 dose levels were performed throughout to achieve sufficient experimental accuracy."( Clinical symptoms and DNA repair characteristics of xeroderma pigmentosum patients from Germany.
Edler, L; Jung, EG; Popanda, O; Thielmann, HW, 1991
)
0.28
" For treatments resulting in fewer than 2 lethal hits, MNU, ENU, and MC gave rise to apparently linear dose-response curves for gene mutations (hgprt and tk genes) as well as for chromosomal aberrations."( Spontaneous and induced chromosomal aberrations and gene mutations in human lymphoblasts: mitomycin C, methylnitrosourea, and ethylnitrosourea.
Jensen, JC; Thilly, WG, 1986
)
0.49
" The dose-response curve for DMtP-induced micronuclei was linear in form with the logarithmic component."( [Mutagenic action of the dimethyl ester of terephthalic acid on murine somatic cells in vivo].
Goncharova, RI; Kozachenko, VI; Pashin, IuV; Zabreĭko, SP, 1988
)
0.27
"Transplacental exposure to the DNA alkylating agent N-methyl-N-nitrosourea on day 16 of gestation in CD-1 albino mice induces a degeneration of the retina, the severity of which depends upon the dosage level of the drug."( Biochemical characterization of retinal protein and phospholipid synthesis in mice exposed transplacentally to N-methyl-N-nitrosourea.
O'Brien, PJ; Smith, SB, 1988
)
0.27
" Using probit analysis, dose-response curves were computed from the experimental data obtained and the effective doses were calculated and compared with maternal toxicity."( Embryotoxicity induced by alkylating agents: 5. Dose-response relationships of teratogenic effects of methylnitrosourea in mice.
Bochert, G; Meister, R; Neubert, D; Pauli, B; Platzek, T, 1988
)
0.49
" The second received the same NMU dosage regime plus IFN (100,000 IU, twice weekly for 3 weeks)."( Alpha 2 interferon in the prevention of N-nitroso-methyl urea induced breast cancer in rats.
Apostolov, K; Barker, W; Habib, NA; Hershman, MJ; Wood, CB, 1988
)
0.27
" Dose-response experiments, which included 10 dose levels, were performed, the data analyzed by linear regression, and the slope of the regression line (term: G0) used as a measure of DNA repair synthesis."( DNA repair synthesis in fibroblast strains from patients with actinic keratosis, squamous cell carcinoma, basal cell carcinoma, or malignant melanoma after treatment with ultraviolet light, N-acetoxy-2-acetyl-aminofluorene, methyl methanesulfonate, and N-
Burkhardt, MR; Edler, L; Jung, EG; Thielmann, HW, 1987
)
0.27
" MMS and ENU both showed shouldered dose-response curves for exponentially growing asynchronous cells, and the same cell-cycle pattern for synchronous cultures with cells in early S phase being the most sensitive."( Cell killing by various monofunctional alkylating agents in Chinese hamster ovary cells.
Goth-Goldstein, R; Hughes, M, 1987
)
0.27
" The observed antineoplastic activity of LPS was dose-related, whereas no dose-response relationship was observed with respect to its toxicity."( Therapeutic ratio of mono or combination bacterial lipopolysaccharide therapy in methylnitrosourea-induced rat mammary carcinoma.
Berger, MR; Petru, E; Schmähl, D, 1987
)
0.5
" The results of this study suggest that the tumor-promoting effects of dietary fat are manifested in terms of a threshold, rather than a linear dose-response effect."( Effect of varying proportions of dietary fat on the development of N-nitrosomethylurea-induced rat mammary tumors.
Choi, K; Cohen, LA; Rose, DP; Weisburger, JH,
)
0.13
" BNU and N-methyl-N-nitrosourea dose-response curves for cell killing suggests that both AT and excision may be involved in the repair of cytotoxic lesions."( Evidence for the excision repair of O6-n-butyldeoxyguanosine in human cells.
Boyle, JM; Margison, GP; Saffhill, R, 1986
)
0.27
" The 1 mg kg-1 dosage did not produce rosettes; in fact, retinas appeared morphologically normal early in life."( Retinal degeneration in the mouse. A model induced transplacentally by methylnitrosourea.
Smith, SB; Yielding, KL, 1986
)
0.5
" Rats were given one injection at 6 weeks of age of N-nitrosomethylurea at a dosage level of 41."( Immunocytochemical and morphological evidence for the origin of N-nitrosomethylurea-induced and naturally occurring primary lung tumors in F344/NCr rats.
Katyal, SL; Ohshima, M; Singh, G; Ward, JM, 1985
)
0.27
" These data were then used to separately construct dose-response curves characteristic for DMBA- and N-methylnitrosourea-induced mammary carcinogenesis."( Determination of the number of events required for mammary carcinogenesis in the Sprague-Dawley female rat.
Isaacs, JT, 1985
)
0.48
" Dose-response relationships were obtained for NMU and NC as well as for BaP."( Local application to mouse skin as a carcinogen specific test system for non-volatile nitroso compounds.
Brune, H; Deutsch-Wenzel, RP; Grimmer, G; Misfeld, J, 1985
)
0.27
"Rats bearing mammary carcinomas induced by N-nitroso-N-methylurea (NMU) were subjected to either no treatment (C), to ovariectomy (O), to continuous ketoconazole dosing at 400 ppm into the diet (K) or to both ovariectomy and ketoconazole dosing (O + K)."( Effect of a high dosage of ketoconazole all or not combined with ovariectomy on N-nitroso-N-methylurea-induced mammary cancer in the rat.
de Coster, R; Hérin, V; Marsboom, R; van Cauteren, H; van den Berghe, J, 1984
)
0.27
" Treatment of established tumors (experiment B) with 6 and 60 mg/kg ET-18-OCH3 daily for 3 weeks effected a stagnation in tumor growth for the higher dosage only with 90% tumor inhibition in comparison to untreated controls; at the same time, however, clear toxic effects were seen, thus indicating a narrow therapeutic index of ET-18-OCH3 in single-drug therapy."( Influence of the alkyllysophospholipid ET-18-OCH3 on methylnitrosourea-induced rat mammary carcinomas.
Berger, MR; Munder, PG; Schmähl, D; Westphal, O, 1984
)
0.52
" A dose-response effect of NMU at 10, 20, 30, 40, and 50 mg/kg body weight was also studied in groups of rats fed an HF or an LF diet."( Effect of duration of high fat intake on enhancement of mammary carcinogenesis in rats.
Chan, PC; Dao, TL, 1983
)
0.27
" When treatment with methylnitrosourea was applied at the beginning of the S phase in synchronized cells, a linear dose-response curve was obtained, whereas application of the dose after gene replication resulted in a strong reduction of the number of induced mutations."( Elimination of MNU-induced mutational lesions in V79 Chinese hamster cells.
Jenssen, D, 1982
)
0.58
" However, the 10-week cessation of treatment following this effective dosage led to a rapid development of tumors."( Inhibition of development of methylnitrosourea-induced rat colon tumors by indomethacin treatment.
Goto, A; Kudo, T; Narisawa, T; Sato, M; Takahashi, T; Tani, M, 1981
)
0.55
" The number of rats with colon tumors and the number of tumors per tumor bearing rat in each dosage regimen was compared to appropriate controls."( Effects of three retinoids on colon adenocarcinomas, sarcomas and hyperplastic polyps induced by intrarectal N-methyl-N-nitrosourea administration in male F344 rats.
Dean, J; Reznik, G; Ward, JM; Wenk, ML, 1981
)
0.26
"The shape of the dose-response curve for mutations induced at low doses of mutagenic agents in mammalian cells was studied."( Relationship between chemical damage of DNA and mutations in mammalian cells. I. Dose-response curves for the induction of 6-thioguanine-resistant mutants by low doses of monofunctional alkylating agents, X-rays and UV radiation in V79 Chinese hamster cel
Jenssen, D; Ramel, C, 1980
)
0.26
" MH yielded positive responses in all laboratories but no linear dose-response pattern was observed."( Tradescantia stamen hair mutation bioassay.
Cabrera, GL; Cebulska-Wasilewska, A; Chen, R; Loarca, F; Ma, TH; Salamone, MF; Vandenberg, AL, 1994
)
0.29
" To look at the dose-response relationship we also treated an additional group of 32 mice with 10 mg MNU at 12:00."( A diurnal variation in the tumorigenic response of mouse epidermis to a single application of the strong short-acting chemical carcinogen methylnitrosourea. A dose-response study of 1, 2 and 10 mg.
Iversen, OH; Iversen, UM,
)
0.33
" Animals sampled 48 hours after dosing with etoposide (10 mg/kg) had no polychromatic erythrocytes in the bone marrow."( Potent clastogenicity of the human carcinogen etoposide to the mouse bone marrow and mouse lymphoma L5178Y cells: comparison to Salmonella responses.
Ashby, J; Callander, RD; Clive, D; Glover, P; Krehl, R; Poorman-Allen, P; Tinwell, H, 1994
)
0.29
"1 mg/kg body wt MNU) as well as extrapolation by probit analysis based on a dose-response study (estimated ED0."( Embryotoxicity induced by alkylating agents: 7. Low dose prenatal-toxic risk estimation based on NOAEL risk factor approach, dose-response relationships, and DNA adducts using methylnitrosourea as a model compound.
Bochert, G; Meister, R; Neubert, D; Platzek, T, 1993
)
0.48
" Experimental and control groups were sacrificed at various time points between 5 and 11 months after dosing with N-nitroso-N-methylurea in order to visualize progressive stages of carcinogenesis of the dorsolateral prostate, the anterior prostate, and the seminal vesicle."( Histogenesis of induced prostate and seminal vesicle carcinoma in Lobund-Wistar rats: a system for histological scoring and grading.
Anzano, MA; Kadomatsu, K; Slayter, MV; Smith, JM; Sporn, MB, 1994
)
0.29
"A co-carcinogenicity experiment was conducted with female Sprague-Dawley rats in which the effects of short-term sodium saccharin dosing and initiation with a direct-acting carcinogen were examined in the urinary bladder."( Study of sodium saccharin co-carcinogenicity in the rat.
Allen, RR; Gaylor, DW; Kadlubar, FF; Sheldon, WG; West, RW, 1994
)
0.29
" Under experimental conditions for quantitative DNA adsorption, a dose-response relationship between the extent of DNA modification and the repair synthesis activity was found."( A chemiluminescent microplate assay to detect DNA damage induced by genotoxic treatments.
Calsou, P; Fournié, GJ; Gosset, I; Hennebelle, I; Provot, C; Salles, B, 1995
)
0.29
" In vivo experimental animal models provide information not available in human populations; they are adequate for hazard identification, dose-response modeling, exposure assessment, and risk characterization, the four required steps for quantifying the estimated risk of cancer development associated with toxic chemical exposure."( Experimentally induced mammary tumors in rats.
Russo, IH; Russo, J, 1996
)
0.29
" In this report, experiments were carried out in which treatment with the Se-garlic was started after carcinogen dosing (DMBA or MNU) but was restricted to either the early or late stage of neoplastic progression."( Selenium-enriched garlic inhibits the early stage but not the late stage of mammary carcinogenesis.
Ip, C; Lisk, DJ; Thompson, HJ, 1996
)
0.29
"In previous studies the direct-acting alkylating model compounds methylnitrosourea (MNU) and ethylmethanesulfonate (EMS) were investigated with regard to dose-response of teratogenicity as well as DNA adduct formation in mice."( Embryotoxicity induced by alkylating agents: 10. Analysis of the combined teratogenic effects of methylnitrosourea and ethylmethanesulfonate in mice.
Bochert, G; Platzek, T, 1995
)
0.75
" In ethanol at 25 degrees C, RPE slowly underwent intramolecular cyclization; small amounts of the cyclized product also appeared in mammary tissue of rats dosed with RPE."( Retinyl ethers as cancer chemopreventive agents. Suppression of mammary cancer.
Eto, I; Frye, JL; Grubbs, CJ; Hill, DL; Kalin, JR; McPhillips, M; Riordan, JM; Sani, BP; Shealy, YF; Wille, JJ, 1997
)
0.3
" Differences in dose-response curves, progression to cancer, and postexposure regression of lesions suggest that TCA and DCA work through different mechanisms."( Dissimilar characteristics of N-methyl-N-nitrosourea-initiated foci and tumors promoted by dichloroacetic acid or trichloroacetic acid in the liver of female B6C3F1 mice.
Latendresse, JR; Pereira, MA,
)
0.13
" Additionally, we examined the effects of intermittent dosing with DHEA."( Modulation of methylnitrosourea-induced breast cancer in Sprague Dawley rats by dehydroepiandrosterone: dose-dependent inhibition, effects of limited exposure, effects on peroxisomal enzymes, and lack of effects on levels of Ha-Ras mutations.
Gordon, GB; Grubbs, CJ; Kelloff, GJ; Lei, XD; Lubet, RA; Moon, RD; Prough, RA; Steele, VE; Thomas, CF; Wang, Y; You, M, 1998
)
0.66
" For rats dosed with the mammary carcinogen, N-methyl-N-nitrosourea (45 mg/kg body weight) and given diets containing either the retinoid vehicle, anhydroretinol (67, 134, 268, or 536 mg/kg of diet), or retinyl acetate (328 mg/kg of diet), there were, over a 90-day observation period, no significant differences in body weights."( Anhydroretinol, a retinoid active in preventing mammary cancer induced in rats by N-methyl-N-nitrosourea.
Crubbs, CJ; Eto, I; Hill, DL; Juliana, MM; Sani, BP; Shealy, YF,
)
0.13
" In the small intestine, treatment with various dosages of ENU (10-150 mg/kg) resulted in a linear dose-response in both lacZ and Dlb-I."( Gene-mutation assays in lambda lacZ transgenic mice: comparison of lacZ with endogenous genes in splenocytes and small intestinal epithelium.
Baan, RA; Bergmans, A; Howard, L; Tates, AD; van Dam, FJ; van Delft, JH; Winton, DJ, 1998
)
0.3
" In a second series of experiments, the effects of limited duration of dosing with vorozole (2."( Chemopreventive effects of the aromatase inhibitor vorozole (R 83842) in the methylnitrosourea-induced mammary cancer model.
Bowden, C; DeCoster, R; Eto, I; Grubbs, CJ; Juliana, MM; Kelloff, GJ; Lubet, RA; Steele, VE; You, M, 1998
)
0.53
" Previously, large-scale dose-response studies on teratogenicity as well as on DNA modification were performed using these substances."( DNA alkylation studies of combined treatment with methylnitrosourea and ethylmethanesulfonate in mice.
Bochert, G; Platzek, T, 2000
)
0.56
" While the alkaline denaturation/alkaline electrophoresis (A/A) procedure proved to be most sensitive at low doses, the alkaline denaturation/neutral electrophoresis (A/N) procedure yielded an optimal dose-response curve within a wider dose range."( N-Methyl-N-nitrosourea-induced DNA damage detected by the comet assay in Vicia faba nuclei during all interphase stages is not restricted to chromatid aberration hot spots.
Meister, A; Menke, M; Schubert, I, 2000
)
0.31
" Comparison of MNU dose-response curves for exonuclease-proficient and -deficient forms of T4 polymerase reveals that the exonuclease efficiently removes 50-86% of total premutagenic alkyl mispairs."( The 3' --> 5' exonuclease of T4 DNA polymerase removes premutagenic alkyl mispairs and contributes to futile cycling at O6-methylguanine lesions.
Eckert, KA; Khare, V, 2001
)
0.31
" In this study, the lowest effective E dosage for preventing mammary cancer was determined."( Short-term exposure to pregnancy levels of estrogen prevents mammary carcinogenesis.
Guzman, RC; Nandi, S; Rajkumar, L; Talamantes, F; Thordarson, G; Yang, J, 2001
)
0.31
" Mature cataract as confirmed histologically by degeneration, swelling, vacuolation, liquefaction of the lens fibers, and formation of Morgagni-like water vacuoles was seen in 80% (8/10), 70% (7/10) and 90% (9/10) of 100, 80 and 70 mg/kg MNU-treated rats, respectively, 4 weeks after dosing (43 days of age)."( Rapid induction of cataract by a single intraperitoneal administration of N-methyl-N-nitrosourea in 15-day-old Sprague-Dawley (Jcl: SD) rats.
Kiuchi, K; Moriguchi, K; Tsubura, A; Yoshizawa, K, 2002
)
0.31
" At the low dosage of 2ME a stimulation of tumor growth was observed, whereas at the high dosage an inhibition was found."( Effect of 2-methoxyestradiol on the growth of methyl-nitroso-urea (MNU)-induced rat mammary carcinoma.
Adlercreutz, H; Berger, MR; Elger, W; Lippert, TH; Mueck, AO; Seeger, H, 2003
)
0.32
" Particularly, it aimed to evaluate the dose-response relationship and to register the MNU-induced pre-neoplasia and neoplasia that may develop in the lympho-hematopoietic system (LHS) of the Wistar rat within a medium-term period."( Thymic lymphomas in Wistar rats exposed to N-methyl-N-nitrosourea (MNU).
Bacchi, MM; da Silva Franchi, CA; de Camargo, JL; Padovani, CR, 2003
)
0.32
" In order to compare the efficacy of different dosing schedules of Seocalcitol, rats were treated either 6 times weekly (1 microg/kg) or by intermittent dosing to achieve the same total weekly dose."( Effects of Seocalcitol (EB1089) on nitrosomethyl urea-induced rat mammary tumors.
Binderup, L; Bramm, E; Colston, KW; Hamberg, KJ; Pirianov, G, 2003
)
0.32
" Despite a significant decrease in proliferating cell nuclear antigen (PCNA)-positive mammary cells in 1000 x treated 21-d-old rats, there were no long-term dose-response effects on mammary-gland morphology and tumor development."( Lack of effects of postnatal exposure to a mixture of aryl hydrocarbon-receptor agonists on the development of methylnitrosourea-induced mammary tumors in sprague-dawley rats.
Charbonneau, M; Cole, J; Desaulniers, D; Leingartner, K; Li, M; Musicki, B; Tsang, BK, 2004
)
0.54
" Body weight gain, structures and functions of estrogen target tissues, and mammary carcinogenesis were compared between dosage groups."( Effects of prepubertal zeranol exposure on estrogen target organs and N-methyl-N-nitrosourea-induced mammary tumorigenesis in female Sprague-Dawley rats.
Nikaido, Y; Shikata, N; Shimano, N; Tsubura, A; Uehara, N; Yuri, T,
)
0.13
" All three chemicals reproducibly generated sublinear (upward convex) dose-response relationships."( Different types of combination effects for the induction of micronuclei in mouse lymphoma cells by binary mixtures of the genotoxic agents MMS, MNU, and genistein.
Lutz, RW; Lutz, WK; Stopper, H; Tiedge, O, 2005
)
0.33
" Our data shows that supplementation of genistein at a dosage comparable to the isoflavone consumption in humans did not affect the reproductive system but resulted in enhancement of NMU-induced tumorigenesis in adult female rats."( Genistein enhances N-nitrosomethylurea-induced rat mammary tumorigenesis.
Kijkuokool, P; Malaivijitnond, S; Parhar, IS, 2006
)
0.33
" Dose-response studies in the same rat model demonstrated that more than 90% inhibition of STS activity in tumors was necessary to induce tumor shrinkage."( A novel steroidal selective steroid sulfatase inhibitor KW-2581 inhibits sulfated-estrogen dependent growth of breast cancer cells in vitro and in animal models.
Akinaga, S; Anazawa, H; Ishida, H; Kuwabara, T; Li, PK; Murakata, C; Nakata, T; Sato, N; Shiotsu, Y; Suzuki, M; Takebayashi, M; Tanaka, H; Terasaki, Y, 2007
)
0.34
"The dose-response relationships for in vitro mutagenicity induced by methylmethanesulfonate (MMS) or methylnitrosourea (MNU) in L5178Y mouse lymphoma (ML) cells were examined."( Dose-response and operational thresholds/NOAELs for in vitro mutagenic effects from DNA-reactive mutagens, MMS and MNU.
Bartels, MJ; Bhaskar Gollapudi, B; Fontaine, DD; McFadden, LG; Pottenger, LH; Schisler, MR; Zhang, F, 2009
)
0.57
" Male and female mice of the C57BL/6 strain were injected by the intraperitoneal route with MNU solution in a dosage of 50 mg/kg body weight."( [Establishment of an animal model with thymic lymphoma in mice].
Huang, RF; Wu, ZZ; Yu, YH, 2009
)
0.35
" Thirty 50-day-old female Sprague-Dawley rats were divided randomly into five groups to detect the dose-response effect of GSL by electroretinogram (ERG) analysis."( Ganoderma spore lipid inhibits N-methyl-N-nitrosourea-induced retinal photoreceptor apoptosis in vivo.
Deng, XG; Gao, Y; Sun, QN; Zhong, ZQ, 2010
)
0.36
" Although daily dosing with erlotinib is effective, weekly dosing may reduce toxicity and have advantages, particularly for prevention."( Effect of intermittent dosing regimens of erlotinib on methylnitrosourea-induced mammary carcinogenesis.
Bode, A; Gill, SC; Grubbs, CJ; Iwata, KK; Juliana, MM; Lubet, RA; Nicastro, HL; Steele, VE; Szabo, E; Tucker, C, 2013
)
0.64
"Mutagenic and clastogenic effects of some DNA damaging agents such as methyl methanesulfonate (MMS) and ethyl methanesulfonate (EMS) have been demonstrated to exhibit a nonlinear or even "thresholded" dose-response in vitro and in vivo."( Quantitative assessment of the dose-response of alkylating agents in DNA repair proficient and deficient ames tester strains.
Guérard, M; Tang, L; Zeller, A, 2014
)
0.4
" Dose-response studies acknowledging the process of multistage tumorigenesis are important; however, data pertaining nonlinearity are not yet available."( Does increase in DNA repair allow "tolerance-to-insult" in chemical carcinogenesis? Skin tumor experiments with MGMT-overexpressing mice.
Becker, K; Kaina, B; Thomas, AD, 2014
)
0.4
" As a continuation of our earlier report that analyzed ethyl methanesulfonate (EMS) and methyl methanesulfonate (MMS) dose-response data (Gollapudi et al."( Derivation of point of departure (PoD) estimates in genetic toxicology studies and their potential applications in risk assessment.
Abraham, L; Bodger, OG; Dearfield, KL; Gollapudi, BB; Heflich, RH; Hixon, JG; Johnson, GE; Lovell, DP; MacGregor, JT; Pottenger, LH; Soeteman-Hernández, LG; Tanir, JY; Thompson, CM; Thybaud, V; van Benthem, J; White, PA; Zeiger, E, 2014
)
0.4
" MNU was administered intraperitionally, dosed at 70 mg/kg body weight."( Rapamycin and PF4 induce apoptosis by upregulating Bax and down-regulating survivin in MNU-induced breast cancer.
Abdul Jalal, MI; Al-Astani Tengku Din, TA; Ariffin Wan Mansor, WN; Idris, FM; Jaafar, H; Shamsuddin, SH, 2014
)
0.4
" In the MNU rat model, metformin dosing (150 or 50 mg/kg BW/d, by gavage) was ineffective in decreasing mammary cancer multiplicity, latency, or weight."( Lack of effect of metformin on mammary carcinogenesis in nondiabetic rat and mouse models.
Bennett, C; Bernard, PS; Bode, AM; Green, JE; Grubbs, CJ; Juliana, MM; Lubet, RA; McGovern, R; Moeinpour, F; Reid, JM; Steele, VE; Stijleman, IJ; Thompson, MD, 2015
)
0.42
" Our previous studies have revealed a non-linear dose-response relationship for cytotoxic effect of both ionizing radiation and N-methyl-N-nitrosourea (MNU) on mouse retina."( [Radiation preconditioning of mouse retina results in tolerance to MNU-induced degeneration and stimulates retinal recovery].
Nekrasova, EI; Ostrovsky, MA; Poplinskaya, VA; Tronov, VA; Vinogradova, YV, 2015
)
0.42
"The nature of the dose-response relationship for various in vivo endpoints of exposure and effect were investigated using the alkylating agents, methyl methanesulfonate (MMS) and methylnitrosourea (MNU)."( Dose-Response for Multiple Biomarkers of Exposure and Genotoxic Effect Following Repeated Treatment of Rats with the Alkylating Agents, MMS and MNU.
Bartels, MJ; Gollapudi, BB; Ji, Z; LeBaron, MJ; Pottenger, LH; Schisler, MR; Zhang, F, 2016
)
0.63
" In the a-wave analysis, the sensitivity parameters (S) of the rod and cone a-waves had decreased on the day after dosing and remained unchanged thereafter."( N-Methyl-N-Nitrosourea-Induced Acute Alteration of Retinal Function and Morphology in Monkeys.
Imaoka, M; Iwata, N; Kimotsuki, T; Kinoshita, J; Maejima, T; Yasuda, M, 2015
)
0.42
" As a part of the study, two DNA alkylating agents, methylnitrosourea (MNU) and temozolomide (TMZ), were dosed by single oral gavage at 25, 50, and 100mg/kg body weight."( Evaluation of the mutagenicity of alkylating agents, methylnitrosourea and temozolomide, using the rat Pig-a assay with total red blood cells or reticulocytes.
Ando, M; Inoue, Y; Iwase, Y; Kato, T; Muto, S; Uno, Y; Yamada, K, 2016
)
0.93
"Hormesis is defined as a biphasic dose-response where biological effects of low doses of a stressor demonstrate the opposite effect to high-dose effects of the same stressor."( Investigation of J-shaped dose-responses induced by exposure to the alkylating agent N-methyl-N-nitrosourea.
Chapman, KE; Doak, SH; Hoffmann, GR; Jenkins, GJS, 2017
)
0.46
"Thirty-two female Sprague Dawley rats at age 21-days old were administered intraperitoneally with N-Methyl-N-Nitroso Urea (NMU), dosed at 70mg/kg body weight."( Evaluation of NMU-Induced Breast Cancer Treated with Sirolimus and Sunitinib on Breast Cancer Growth.
Jaafar, H; Jaffar, NFN; Muhammad Sakri, MS; Tengku Din, TADA; Wan Abdul Rahman, WF, 2020
)
0.56
[information is derived through text-mining from research data collected from National Library of Medicine (NLM), extracted Dec-2023]

Roles (4)

RoleDescription
alkylating agentHighly reactive chemical that introduces alkyl radicals into biologically active molecules and thereby prevents their proper functioning. It could be used as an antineoplastic agent, but it might be very toxic, with carcinogenic, mutagenic, teratogenic, and immunosuppressant actions. It could also be used as a component of poison gases.
carcinogenic agentA role played by a chemical compound which is known to induce a process of carcinogenesis by corrupting normal cellular pathways, leading to the acquistion of tumoral capabilities.
mutagenAn agent that increases the frequency of mutations above the normal background level, usually by interacting directly with DNA and causing it damage, including base substitution.
teratogenic agentA role played by a chemical compound in biological systems with adverse consequences in embryo developments, leading to birth defects, embryo death or altered development, growth retardation and functional defect.
[role information is derived from Chemical Entities of Biological Interest (ChEBI), Hastings J, Owen G, Dekker A, Ennis M, Kale N, Muthukrishnan V, Turner S, Swainston N, Mendes P, Steinbeck C. (2016). ChEBI in 2016: Improved services and an expanding collection of metabolites. Nucleic Acids Res]

Drug Classes (1)

ClassDescription
N-nitrosoureasA nitroso compound that is any urea in which one of the nitrogens is substituted by a nitroso group
[compound class information is derived from Chemical Entities of Biological Interest (ChEBI), Hastings J, Owen G, Dekker A, Ennis M, Kale N, Muthukrishnan V, Turner S, Swainston N, Mendes P, Steinbeck C. (2016). ChEBI in 2016: Improved services and an expanding collection of metabolites. Nucleic Acids Res]

Protein Targets (3)

Potency Measurements

ProteinTaxonomyMeasurementAverage (µ)Min (ref.)Avg (ref.)Max (ref.)Bioassay(s)
retinoic acid nuclear receptor alpha variant 1Homo sapiens (human)Potency68.58960.003041.611522,387.1992AID1159552; AID1159553; AID1159555
estrogen nuclear receptor alphaHomo sapiens (human)Potency4.89720.000229.305416,493.5996AID743069
heat shock protein beta-1Homo sapiens (human)Potency57.26570.042027.378961.6448AID743210; AID743228
[prepared from compound, protein, and bioassay information from National Library of Medicine (NLM), extracted Dec-2023]

Bioassays (7)

Assay IDTitleYearJournalArticle
AID134248Mean life extension in mice bearing Trypanosoma rhodesiense, after ip administration at 0.4 mmol/kg dose1990Journal of medicinal chemistry, Feb, Volume: 33, Issue:2
Methylating agents as trypanocides.
AID1154293Cytotoxicity against human HeLaS3 cells assessed as cell viability after 24 to 72 hrs by MTT assay2014European journal of medicinal chemistry, Jul-23, Volume: 82Synthesis and in vitro antitumor activity of novel 2-alkyl-5-methoxycarbonyl-11-methyl-6H-pyrido[4,3-b]carbazol-2-ium and 2-alkylellipticin-2-ium chloride derivatives.
AID26180Half-life in plasma by using UV method1981Journal of medicinal chemistry, Feb, Volume: 24, Issue:2
Potential inhibitors of nucleotide biosynthesis. 1. Nitrosoureidonucleosides. 2.
AID134111Mean life extension in mice bearing Trypanosoma rhodesiense, after ip administration at a dose of 0.2 mmol/kg1990Journal of medicinal chemistry, Feb, Volume: 33, Issue:2
Methylating agents as trypanocides.
AID23772Half life was measured at pH 71988Journal of medicinal chemistry, Jan, Volume: 31, Issue:1
Nitrosoureido nucleosides as potential inhibitors of nucleotide biosynthesis.
AID23443Partition coefficient (logP)1985Journal of medicinal chemistry, Mar, Volume: 28, Issue:3
Use of physicochemical parameters in distance geometry and related three-dimensional quantitative structure-activity relationships: a demonstration using Escherichia coli dihydrofolate reductase inhibitors.
AID1865934Toxicity in female Wistar rat xenografted with methyl nitroso urea (MNU)-preinduced breast cancer assessed as reduction in breast epithelial density at 5 mg/kg, po
[information is prepared from bioassay data collected from National Library of Medicine (NLM), extracted Dec-2023]

Research

Studies (2,988)

TimeframeStudies, This Drug (%)All Drugs %
pre-19901337 (44.75)18.7374
1990's764 (25.57)18.2507
2000's506 (16.93)29.6817
2010's328 (10.98)24.3611
2020's53 (1.77)2.80
[information is prepared from research data collected from National Library of Medicine (NLM), extracted Dec-2023]

Market Indicators

Research Demand Index: 33.96

According to the monthly volume, diversity, and competition of internet searches for this compound, as well the volume and growth of publications, there is estimated to be moderate demand-to-supply ratio for research on this compound.

MetricThis Compound (vs All)
Research Demand Index33.96 (24.57)
Research Supply Index8.09 (2.92)
Research Growth Index4.30 (4.65)
Search Engine Demand Index55.48 (26.88)
Search Engine Supply Index2.00 (0.95)

This Compound (33.96)

All Compounds (24.57)

Study Types

Publication TypeThis drug (%)All Drugs (%)
Trials10 (0.31%)5.53%
Reviews102 (3.15%)6.00%
Case Studies8 (0.25%)4.05%
Observational0 (0.00%)0.25%
Other3,122 (96.30%)84.16%
[information is prepared from research data collected from National Library of Medicine (NLM), extracted Dec-2023]