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ryanodine

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Description

Ryanodine: A methylpyrrole-carboxylate from RYANIA that disrupts the RYANODINE RECEPTOR CALCIUM RELEASE CHANNEL to modify CALCIUM release from SARCOPLASMIC RETICULUM resulting in alteration of MUSCLE CONTRACTION. It was previously used in INSECTICIDES. It is used experimentally in conjunction with THAPSIGARGIN and other inhibitors of CALCIUM ATPASE uptake of calcium into SARCOPLASMIC RETICULUM. [Medical Subject Headings (MeSH), National Library of Medicine, extracted Dec-2023]

ryanodine : An insecticide alkaloid isolated from South American plant Ryania speciosa. [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]

FloraRankFlora DefinitionFamilyFamily Definition
RyaniagenusA plant genus of the family Salicaceae that is the source of RYANODINE.[MeSH]SalicaceaeA plant family of the order MALPIGHIALES, superorder ROSANAE, class MAGNOLIOPSIDA. The leaves are alternate and simple, and staminate (male) flowers consist of one to several stamens; pistillate (female) flowers consist of a single-chambered ovary with several ovules that produce silky seeds.[MeSH]

Cross-References

ID SourceID
PubMed CID441753
SCHEMBL ID5933502
MeSH IDM0019318

Synonyms (27)

Synonym
ryania speciosa, powdered stems of
bonide ryatox
ryania [iso]
6-(1alpha,5abeta,8abeta,9-pentahydroxy-7beta-isopropyl-2beta,5beta,8beta-trimethylperhydro-8balpha,9-epoxy-5,8-ethanocyclopenta(1,2-b)indenyl) pyrrole-2-carboxylate
nsc 114572
ground ryania specisa(vahl) stemwood (alkoloid ryanodine)
ryania powder
ryanicide
ryanexel
einecs 239-732-2
15662-33-6
ryanodine
C08705
ryania
unii-37h6ate4sa
1h-pyrrole-2-carboxylic acid, (3s,4r,4ar,6s,6as,7s,8r,8as,8br,9s,9as)-dodecahydro-4,6,7,8a,8b,9a-hexahydroxy-3,6a,9-trimethyl-7-(1-methylethyl)-6,9-methanobenzo(1,2)pentaleno(1,6-bc)furan-8-yl ester
37h6ate4sa ,
(+)-ryanodine
8047-13-0
ryanex
ryanodine [mi]
SCHEMBL5933502
ryanodine, >=98% (hplc)
Q424726
HY-103306
CS-0027567
MS-29167

Research Excerpts

Overview

Ryanodine (1) is a potent modulator of intracellular calcium release channels, designated as ryanodine receptors. Ryanodine is a plant alkaloid that was originally used as an insecticide.

ExcerptReferenceRelevance
"Ryanodine is a cell permeant plant alkaloid that binds selectively and with high affinity to ryanodine receptor (RyR) Ca(2+) release channels. "( Inhibitory ryanodine prevents ryanodine receptor-mediated Ca²⁺ release without affecting endoplasmic reticulum Ca²⁺ content in primary hippocampal neurons.
Adasme, T; Hidalgo, C; Paula-Lima, A, 2015
)
2.25
"Ryanodine (1) is a potent modulator of intracellular calcium release channels, designated as ryanodine receptors. "( Symmetry-Driven Strategy for the Assembly of the Core Tetracycle of (+)-Ryanodine: Synthetic Utility of a Cobalt-Catalyzed Olefin Oxidation and α-Alkoxy Bridgehead Radical Reaction.
Hagiwara, K; Inoue, M; Kawamata, T; Koshimizu, M; Masuda, K; Matsui, Y; Nagatomo, M; Urabe, D, 2016
)
2.11
"Ryanodine (1) is a plant-derived natural product with powerful pharmacological and insecticidal action, and is a potent modulator of intracellular calcium release channels. "( Chemical Conversion of Ryanodol to Ryanodine.
Inoue, M; Masuda, K; Nagatomo, M, 2016
)
2.15
"Ryanodine is a selective ryanodine receptor (RyR) blocker, with binding dependent on RyR opening. "( Inhibition of ryanodine receptors by 4-(2-aminopropyl)-3,5-dichloro-N,N-dimethylaniline (FLA 365) in canine pulmonary arterial smooth muscle cells.
Goyal, R; Hume, JR; McAllister, CE; Osman, N; Ostrovskaya, O; Pessah, IN; Wilson, SM, 2007
)
2.14
"Ryanodine is a neutral plant alkaloid which binds to an ion channel located on the SR membrane."( Ontogeny of the ryanodine receptor in rabbit urinary bladder smooth muscle.
Gong, C; Levin, RM; Zderic, SA, 1994
)
1.36
"Ryanodine is a pharmacological tool which can be utilized to study the role of intracellular calcium in mediating contractile events."( Effect of ryanodine on the contractile response of the normal and hypertrophied rabbit urinary bladder to field stimulation.
Levin, RM; Sillen, U; Wein, AJ; Yoon, JY; Zderic, SA, 1993
)
1.41
"Ryanodine is a selective modulator of caffeine-sensitive Ca2+ stores in ER."( Norepinephrine release from guinea pig cardiac sympathetic nerves is insensitive to ryanodine under physiological conditions.
Gurnett, CA; Pardini, BJ; Schmid, PG; Whiteis, CA, 1993
)
1.23
"Ryanodine is a pharmacological agent that can inhibit calcium-stimulated calcium release from the sarcoplasmic reticulum."( Evidence for a role of intracellular-calcium release in nitric oxide-stimulated relaxation of the rabbit corpus cavernosum.
Broderick, GA; Hypolite, JA; Levin, RM,
)
0.85
"Ryanodine is a plant alkaloid that was originally used as an insecticide. "( Molecular cloning of cDNA encoding a drosophila ryanodine receptor and functional studies of the carboxyl-terminal calcium release channel.
Bhat, MB; Ma, J; Nishi, M; Takeshima, H; Xu, X, 2000
)
2.01
"Ryanodine is a significantly less potent negative inotrope in isolated papillary muscles prepared from 1-2-month-old BIO 14.6 hamsters than in muscles from F1B controls (IC50 = 4.3 +/- 1 vs."( Radioligand binding and inotropic effects of ryanodine in the cardiomyopathic Syrian hamster.
Finkel, MS; Oddis, CV; Romeo, RC; Salama, G; Shen, L, 1992
)
1.26
"Ryanodine is a pharmacological agent that stimulates calcium leakage into the cytoplasm resulting in an increase in tension. "( Effect of ryanodine on mitochondrial respiration.
Haugaard, N; Kaplan, M; Levin, RM; Packard, D; Wein, AJ, 1992
)
2.13
"Ryanodine is a specific ligand for the calcium release channel which mediates calcium release in excitation-contraction coupling in muscle. "( Positive cooperativity of ryanodine binding to the calcium release channel of sarcoplasmic reticulum from heart and skeletal muscle.
Fleischer, S; Inui, M; McGrew, SG; Siegl, P; Wolleben, C, 1989
)
2.02
"Ryanodine appears to be a useful tool for determining the functional relevance of sarcoplasmic reticulum for contraction in different arterial smooth muscles."( Role of sarcoplasmic reticulum in arterial contraction: comparison of ryanodines's effect in a conduit and a muscular artery.
Ashida, T; Blaustein, MP; Goldman, WF; Schaeffer, J; Wade, JB, 1988
)
1.23
"Ryanodine is a selective inhibitor of calcium release from the SR."( Effects of ryanodine on relaxation in isolated myocardium from different animal species.
Brutsaert, DL; De Clerck, NM; Hoste, AM; Sys, SU, 1988
)
1.39

Effects

The ryanodine receptor has been mainly regarded as the Ca2+ release channel from sarcoplasmic reticulum controlling skeletal and cardiac muscle contraction. Ryanodine has different effects on the contractility of rat and guinea pig ventricular muscle.

ExcerptReferenceRelevance
"Ryanodine (> 1 nM) has an effect similar to caffeine."( A ryanodine-sensitive calcium store in ascidian eggs monitored by whole-cell patch-clamp recordings.
Albrieux, M; Antoine, AF; Arnoult, C; Grunwald, D; Marty, I; Villaz, M, 1997
)
1.74
"The ryanodine receptor has been mainly regarded as the Ca2+ release channel from sarcoplasmic reticulum controlling skeletal and cardiac muscle contraction. "( Ryanodine receptors in liver.
Gaspers, LD; Pierobon, N; Renard-Rooney, DC; Thomas, AP, 2006
)
2.33
"Ryanodine has different effects on the contractility of rat and guinea pig ventricular muscle. "( Effects of ryanodine on the intracellular Na+ activity and tension and action potentials of rat and guinea pig cardiac ventricular muscles.
Park, SR; Suh, CK, 1993
)
2.12
"The ryanodine receptor has been widely demonstrated to be a Ca2+ release channel in both skeletal and cardiac muscle. "( Characterization of [3H]ryanodine binding sites in smooth muscle of dog mesentery artery.
Daniel, EE; Kwan, CY; Zhang, ZD, 1993
)
1.15
"Ryanodine has been shown to selectively inhibit the initial phase of contraction of rat vas deferens smooth muscle stimulated by endogenous release of norepinephrine (NE) (1), and part of this effect could be pre-junctional. "( Internal calcium stores and norepinephrine overflow from isolated, field stimulated rat vas deferens.
Bourreau, JP, 1996
)
1.74
"Ryanodine (> 1 nM) has an effect similar to caffeine."( A ryanodine-sensitive calcium store in ascidian eggs monitored by whole-cell patch-clamp recordings.
Albrieux, M; Antoine, AF; Arnoult, C; Grunwald, D; Marty, I; Villaz, M, 1997
)
1.74
"Ryanodine at 50 microM has no effect on electrically-evoked contractions."( Contraction and relaxation in the absence of a sarcoplasmic reticulum: muscle fibres in the small pelagic tunicate Doliolum.
Bone, Q; Inoue, I; Tsutsui, I, 1997
)
1.02
"Ryanodine has been widely used to identify contributions made by the RyR to signaling in both muscle and nonmuscle cells."( Ryanodine receptor point mutant E4032A reveals an allosteric interaction with ryanodine.
Allen, PD; Chen, L; Fessenden, JD; Franzini-Armstrong, C; Paolini, C; Pessah, IN; Wang, Y, 2001
)
2.47
"The ryanodine receptor has been purified from junctional terminal cisternae of fast skeletal muscle sarcoplasmic reticulum (SR). "( Purification of the ryanodine receptor and identity with feet structures of junctional terminal cisternae of sarcoplasmic reticulum from fast skeletal muscle.
Fleischer, S; Inui, M; Saito, A, 1987
)
1.15

Actions

Ryanodine abolished the increase in [Ca2+]i induced by NE but slightly inhibited the tension. Ryanodine analogs can cause the channel to persist in long-lived, subconductance states or, at high ligand concentrations, in closed, nonconducting states.

ExcerptReferenceRelevance
"Ryanodine receptors plays a crucial role in skeletal muscle excitation-contraction coupling by releasing calcium ions required for muscle contraction from the sarcoplasmic reticulum. "( A recessive ryanodine receptor 1 mutation in a CCD patient increases channel activity.
Ghassemi, F; Jungbluth, H; Meissner, G; Muntoni, F; Treves, S; Vukcevic, M; Xu, L; Zhou, H; Zorzato, F, 2009
)
2.17
"Ryanodine gave an increase of cytoplasmic free calcium due to the liberation of calcium from internal stores and to the influx of extracellular calcium."( Ryanodine as inhibitor of chemotactic peptide-induced chemotaxis in human neutrophils.
De Koster, BM; Elferink, JG, 1995
)
2.46
"Ryanodine did not cause contraction during Ca2+ loading, but caffeine-induced contractions were reduced after ryanodine treatment in both groups."( Recycling and buffering of intracellular calcium in vascular smooth muscle from genetically hypertensive rats.
Ansari, MN; Ghosh, S; Kanagy, NL; Webb, RC, 1994
)
1.01
"Ryanodine abolished the increase in [Ca2+]i induced by NE but slightly inhibited the tension."( Contractile responses and calcium movements induced by alpha 1-adrenoceptor stimulant, norepinephrine, in rabbit iris dilator muscle.
Kokubu, N; Satoh, M; Takayanagi, I, 1993
)
1.01
"Ryanodine analogs can cause the channel to persist in long-lived, subconductance states or, at high ligand concentrations, in closed, nonconducting states."( The pyrrole locus is the major orienting factor in ryanodine binding.
Airey, J; Mitchell, KE; Ruest, L; Sutko, JL; Welch, W, 1996
)
1.27
"Ryanodine inhibited the increase in the maximal rate of rise of [Ca2+]i resulting in abolishment of the correlation between force and the maximal rate of rise of [Ca2+]i."( Tight coupling between the rate of rise of Ca2+ transient and peak twitch contraction in guinea-pig papillary muscle.
Endoh, M; Hori, M; Karaki, H; Miyamoto, S; Ozaki, H, 1999
)
1.02
"The ryanodine-induced increase was due to influx of extracellular calcium because it was blocked by removal of extracellular calcium or by diltiazem."( Fetal rabbit pulmonary artery smooth muscle cell response to ryanodine is developmentally regulated.
Cornfield, DN; Porter, VA; Reeve, HL, 2000
)
1.03
"Ryanodine is said to destroy exclusively the connection between T-tubulus and sarcoplasmic reticulum."( The role of the sarcoplasmic reticulum in the pure frequency potentiation: the effect of ryanodine.
Rumberger, E, 1976
)
1.2
"Ryanodine did not inhibit the response to ACh."( Pharmacological distinction of the hyperpolarization response to caffeine and acetylcholine in guinea-pig coronary endothelial cells.
Chen, G; Cheung, DW, 1992
)
1
"The ryanodine-associated increase in [Ca2+]i, which was sustained in 0 Ca PSS during the 10 min ryanodine exposure in cells not pretreated with caffeine, suggests that ryanodine releases Ca2+ from the sarcoplasmic reticulum, but also inhibits Ca2+ efflux.6."( Multiple effects of ryanodine on intracellular free Ca2+ in smooth muscle cells from bovine and porcine coronary artery: modulation of sarcoplasmic reticulum function.
Hu, Q; Sturek, M; Wagner-Mann, C, 1992
)
1.09
"Ryanodine did inhibit spontaneous contractions of guinea-pig cells during exposure to low extracellular sodium."( Electrical activity and contraction in cells isolated from rat and guinea-pig ventricular muscle: a comparative study.
Mitchell, MR; Powell, T; Terrar, DA; Twist, VW, 1987
)
0.99

Treatment

Ryanodine treatment abolished the reduction in the second [Ca2+]i response. Thapsigargin increased the reduction by 67%. Ryanodine pretreatment in combination with NE, ACh or K had no effect on the contract.

ExcerptReferenceRelevance
"Ryanodine (100 μM) pretreatment reduced the magnitude of the Ca(2+) signal and the area under the curve."( The ryanodine receptor is expressed in human pancreatic acinar cells and contributes to acinar cell injury.
Bottino, R; Eisses, JF; Husain, SZ; Jayaraman, T; Jin, S; Lewarchik, CM; Malik, A; Muili, KA; Orabi, AI; Shah, AU; Wang, D, 2014
)
1.68
"Ryanodine pretreatment, which abolishes CICR mediated by ryanodine receptors, did not prevent CICR."( Ca(2+)-induced Ca(2+) release via inositol 1,4,5-trisphosphate receptors is amplified by protein kinase A and triggers exocytosis in pancreatic beta-cells.
Dyachok, O; Gylfe, E, 2004
)
1.04
"Ryanodine pretreatment abolished the caffeine-induced [Ca2+]i transients and reduced [Ca2+]i response due to sodium removal.(ABSTRACT TRUNCATED AT 400 WORDS)"( Ca2+ entry through Na(+)-Ca2+ exchange can trigger Ca2+ release from Ca2+ stores in Na(+)-loaded guinea-pig coronary myocytes.
Isenberg, G, 1993
)
1.01
"2. Ryanodine treatment decreased the Ca2+ uptake capacity of the SR in a fixed Ca2+ loading condition."( Effects of ryanodine on the properties of Ca2+ release from the sarcoplasmic reticulum in skinned skeletal muscle fibres of the frog.
Endo, M; Iino, M; Oyamada, H, 1993
)
1.19
"Ryanodine treatment reduced the force of contraction and increased its duration, and the pattern of the PESP phenomenon was altered."( Mechanisms underlying the genesis of post-extrasystolic potentiation in rat cardiac muscle.
Campagnaro, P; Faria, AN; Lima, EQ; Mill, JG; Vassallo, DV, 1995
)
1.01
"Ryanodine treatment or repetitive application of phenylephrine eliminated both caffeine-and halothane-induced contractions in the Ca2+ free solution."( Dual actions of halothane on intracellular calcium stores of vascular smooth muscle.
Akata, T; Boyle, W, 1996
)
1.02
"Ryanodine-treated Ca2+ channel became permeable to glucose even in the absence of KCl."( Regulation of calcium release channel in sarcoplasmic reticulum.
Ide, T; Kasai, M, 1996
)
1.02
"In ryanodine-treated smooth muscle cells, Y-26763 hyperpolarized the membrane and potently inhibited the membrane depolarization induced by Hist."( Effect of membrane hyperpolarization induced by a K+ channel opener on histamine-induced Ca2+ mobilization in rabbit arterial smooth muscle.
Itoh, T; Suzuki, A; Suzuki, H; Watanabe, Y, 1996
)
0.81
"In ryanodine-treated strips, which had functionally lost the histamine-sensitive Ca2+ storage sites, histamine (3 microM) slowly increased [Ca2+]i and force."( Effect of cilostazol, a phosphodiesterase type III inhibitor, on histamine-induced increase in [Ca2+]i and force in middle cerebral artery of the rabbit.
Itoh, T; Kanmura, Y; Shiraishi, Y, 1998
)
0.81
"Ryanodine-treated cells (1 microM-10 mM), caffeine-treated cells (5 mM 500 nM) and A23187-treated cells were uncoupled at their gap junctions."( Gap junction change in supporting cells of the organ of Corti with ryanodine and caffeine.
Handa, T; Matsumura, M; Orita, Y; Sato, Y, 1998
)
1.26
"Ryanodine treatment abolished the reduction in the second [Ca2+]i response, while thapsigargin increased the reduction by 67%."( Intracellular calcium stores are involved in growth hormone-releasing hormone signal transduction in rat somatotrophs.
Bleicher, C; Lussier, BT; Petit, A, 1999
)
1.02
"Ryanodine treatment in freshly isolated adult myocytes blocked the calcium waves, indicating that calcium release at the level of the sarcoplasmic reticulum and t-tubule complex was the initiating factor, and this effect of ryanodine treatment was also seen in cultured-dedifferentiated adult myocytes."( Calcium signaling mechanisms in dedifferentiated cardiac myocytes: comparison with neonatal and adult cardiomyocytes.
Bick, RJ; Buja, LM; Poindexter, BJ; Smith, JR, 2001
)
1.03
"In ryanodine-treated arteries, the rate and magnitude of high-potassium-induced contraction were enhanced slightly in SHR and greatly in WKY rats, resulting in no final difference between SHR and WKY rats."( Malfunction of arterial sarcoplasmic reticulum leading to faster and greater contraction induced by high-potassium depolarization in young spontaneously hypertensive rats.
Aoki, K; Asano, M; Fujimoto, S; Kojima, M; Matsuda, T, 1991
)
0.8
"Ryanodine (10(-4) M) pretreatment reduced stretch-induced ANF release by an average 34%, in addition to inhibiting tension development and beating."( Stretch-secretion coupling in atrial cardiocytes. Dissociation between atrial natriuretic factor release and mechanical activity.
de Bold, AJ; Kuroski-de Bold, ML, 1991
)
1
"Ryanodine pretreatment in combination with NE, ACh or K had no effect on the contractions induced by each agonist.(ABSTRACT TRUNCATED AT 250 WORDS)"( Effects of ryanodine and nifedipine on contractions induced by norepinephrine, acetylcholine, and potassium in the isolated vas deferens of the guinea pig.
Gomi, Y; Tsunobuchi, H, 1990
)
1.39
"In ryanodine pretreated preparations, 10 mM caffeine produced an early phase of APp, but did not affect the contraction abolished by ryanodine, while a higher concentration of caffeine (25 mM) markedly increased the contraction with an augmentation of the electrical response."( Comparison between effects of caffeine and ryanodine on electromechanical coupling in myocardium of hibernating chipmunks: role of internal Ca stores.
Kondo, N, 1988
)
1.05
"In ryanodine-pretreated atria, the duration of depletion was clearly limited by action potential duration at post-rest stimulations; in the presence of 4-aminopyridine (2 mM), depletion continued essentially undiminished for up to 200 ms."( Extracellular calcium transients at single excitations in rabbit atrium measured with tetramethylmurexide.
Hilgemann, DW, 1986
)
0.78
"Pretreatment with ryanodine (10(-5)M), however, had no effect on the ATP-evoked responses."( ATP stimulates Ca(2+)-waves and gene expression in cultured human pulmonary fibroblasts.
Farkas, L; Janssen, LJ; Kolb, MR; Rahman, T, 2009
)
0.68
"Treatment with ryanodine (0.5 to 2 micromol/L) resulted in a depolarization of the resting potential and a development of pacemaker depolarization."( Pacing-induced spontaneous activity in myocardial sleeves of pulmonary veins after treatment with ryanodine.
Boyett, MR; Honjo, H; Horiuchi, T; Inada, S; Kamiya, K; Kodama, I; Mitsui, K; Niwa, R; Shibata, N; Yamamoto, M, 2003
)
0.88
"Pretreatment with ryanodine (2 x 10(-5) M), which has been shown to combine with receptors on endoplasmic reticulum (ER) of endothelium, attenuated caffeine-induced relaxation and cGMP content increase of rings with endothelium."( Endothelium-dependent and -independent vasodilation of isolated rat aorta induced by caffeine.
Hatano, Y; Iranami, H; Mizumoto, K; Yamamoto, M; Yoshiyama, T, 1995
)
0.61
"Treatment with ryanodine or dantrolene, which block the calcium release channel of the sarcoplasmic reticulum, inhibited the carbachol-induced zif268 response essentially completely."( Cholinergic stimulation of skeletal muscle cells induces rapid immediate early gene expression: role of intracellular calcium.
Abu-Shakra, SR; Adams, RN; Cole, AJ; Drachman, DB, 1994
)
0.63
"Pretreatment with ryanodine caused a more potent dose-dependent inhibition of 10 mM caffeine-induced contractions in SHR than in WKY."( Ryanodine-induced contraction in femoral artery from spontaneously hypertensive rats.
Dohi, Y; Kojima, M; Sato, K, 1994
)
2.05
"Pretreatment with ryanodine, a compound which depletes Ca2+ stored in the sarcoplasmic reticulum, abolished the first component, but not the second sustained decrease in [Ca2+]i by Iso."( Effects of isoprenaline on cytosolic calcium concentrations and on tension in the porcine coronary artery.
Abe, S; Kanaide, H; Kobayashi, S; Nishimura, J; Ushio-Fukai, M, 1993
)
0.61
"Pretreatment with ryanodine (0.1 microM) inhibited caffeine- but not muscarine-stimulated responses."( Exocytosis coupled to mobilization of intracellular calcium by muscarine and caffeine in rat chromaffin cells.
Guo, X; Przywara, DA; Wakade, AR; Wakade, TD, 1996
)
0.62
"6. Treatment with ryanodine (100 microM) and caffeine (10 mM) in Ca(2+)-free solution reduced the tension measured 5 min after NA (30 microM) and ET-1 (30 nM) addition, but the sustained response (tension at 25 min) remained unaffected."( Endothelin receptor-mediated Ca2+ mobilization and contraction in bovine oviductal arteries: comparison with noradrenaline and potassium.
Costa, G; García-Pascual, A; Jimenez, E; Labadía, A; Triguero, D, 1997
)
0.62
"Treatment with ryanodine (10 microM) and caffeine (20 mM) had a similar effect."( Preferential role of intracellular Ca2+ stores in regulation of isometric force in NIH 3T3 fibroblast fibres.
Nobe, H; Nobe, K; Obara, K; Paul, RJ, 2000
)
0.65
"Pre-treatment with ryanodine did not change the calcium signal brought about by halothane or ionomycin."( [Effects of halothane, caffeine and ryanodine on the intracellular calcium store in blood mononuclear cells].
Endo, M; Iino, M; Kawana, Y; Oyamada, H, 1992
)
0.88
"Pretreatment with ryanodine abolished the caffeine-induced Ca2+ release, and addition of caffeine before ryanodine reduced the ryanodine-induced Ca2+ release by 64.4%."( Inositol 1,4,5-trisphosphate- and guanosine 5'-O-(3-thiotriphosphate)-induced Ca2+ release in cultured airway smooth muscle.
Cameron, IR; Chopra, LC; Twort, CH; Ward, JP, 1991
)
0.6
"Pretreatment with ryanodine in combination with caffeine attenuated prephasic and tonic components of the contractions induced by NE and ACh in a dose-dependent manner."( Effects of ryanodine and nifedipine on contractions induced by norepinephrine, acetylcholine, and potassium in the isolated vas deferens of the guinea pig.
Gomi, Y; Tsunobuchi, H, 1990
)
0.99
"Pretreatment with ryanodine (1 mumol.litre-1) abolished delayed afterdepolarisations and triggered activity induced by H2O2."( Effects of hydrogen peroxide on action potentials and intracellular Ca2+ concentration of guinea pig heart.
Hayashi, H; Kobayashi, A; Miyata, H; Watanabe, H; Yamazaki, N, 1989
)
0.6
"Pretreatment with ryanodine (1 microM) or caffeine (10 mM) abolished the initial phasic component of this response, while increasing the subsequent tonic component."( Comparison of effects of ryanodine and caffeine on rat ventricular myocardium.
Kort, AA; Lakatta, EG; Sutko, JL; Thompson, LJ, 1986
)
0.9

Dosage Studied

Ryanodine in uptake phase or release phase increased caffeine-induced tension transients in the SR of both muscle types. The maximum effect, which corresponds to 65% of the maximum effect of ryanodine, is achieved at therapeutic concentrations. Ventricular function decreased by 60% in both CH and FH under Ryanodine.

ExcerptRelevanceReference
" Ventricular function decreased by 60% in both CH and FH under ryanodine with similar dose-response curves."( Force-frequency relations and response to ryanodine in failing rabbit hearts.
Crozatier, B; el Houda Bouanani, N; Ezzaher, A, 1992
)
0.79
" The dose-response curve is bell shaped, and the maximum effect, which corresponds to 65% of the maximum effect of ryanodine, is achieved at therapeutic concentrations."( Effect of gallopamil on cardiac sarcoplasmic reticulum.
Galbani, P; Limbruno, U; Mariani, M; Ronca, G; Ronca-Testoni, S; Yu, G; Zucchi, R, 1992
)
0.49
" Millimolar concentration of ATP, which is present physiologically, will shift the dose-response relation of IP3 toward the higher IP3 concentration and enhance the maximal effect of IP3."( Effects of adenine nucleotides on inositol 1,4,5-trisphosphate-induced calcium release in vascular smooth muscle cells.
Iino, M, 1991
)
0.28
"With regard to the inhibition of contractility, dose-response curves of ryanodine and nickel were produced, and in these curves ID50 values were 10(-6) M and 2 x 10(-3) M, respectively."( [The effect of local anesthetics on the isolated human right atrial appendages--Part 2: Bupivacaine is different from lidocaine concerning the mechanism of inhibition of contractility].
Itoh, H; Minakuchi, C, 1991
)
0.51
"5 mM), glyburide (1 microM) and 20 mM K+ all caused a rightward shift of the pinacidil dose-response curve (DRC) and a corresponding increase in the pinacidil IC50."( Characterization of K+ channel-dependent as well as -independent components of pinacidil-induced vasodilation.
Cipkus-Dubray, LA; Khan, SA; Meisheri, KD; Oleynek, JJ; Purohit, SS; Swirtz, MA, 1991
)
0.28
" Ryanodine in uptake phase or release phase increased caffeine-induced tension transients in the SR of both muscle types; however, no dose-response relation was found."( Effects of ryanodine on skinned skeletal muscle fibers of the rabbit.
Su, JY, 1987
)
1.57
" A calcium dose-response curve in normal and cardiomyopathic dog myocardium was also constructed."( Tension-frequency relationships in normal and cardiomyopathic dog and hamster myocardium.
Li, K; Rouleau, JL, 1995
)
0.29
" Dose-response curves on the production of inositol-1,4,5-trisphosphate and Ca2+ by ATP and UTP were consistently similar."( Expression cloning and signal transduction pathway of P2U receptor in mammary tumor cells.
Enomoto, K; Furuya, K; Maeno, T; Moore, RC; Oka, T; Yamagishi, S,
)
0.13
" The Khalf values of the dose-response curve were 12 and 97 microM in the JSR membrane vesicles and the solubilized proteins, respectively."( Modulation of ryanodine binding to the cardiac Ca2+ release channel by arachidonic acid.
Imanaga, I; Uehara, A; Yasukochi, M, 1996
)
0.65
" After an equilibration period, a cumulative dose-response curve for contractility (peak tension) was obtained with ryanodine (0."( Evaluation of the regional responsivity to ryanodine of human myocardium from patients with idiopathic dilated cardiomyopathy and secondary cardiomyopathies.
Casarotto, D; Dalla Volta, S; Livi, U; Magnolfi, G; Padrini, R; Panfili, M; Pesarin, F; Piovan, D; Testolin, L,
)
0.6
"5 microm) of cADPR shifted the dose-response curve of caffeine-induced 45Ca2+ release to the left."( Characterization of ryanodine-sensitive Ca2+ release from microsomal vesicles of rat parotid acinar cells: regulation by cyclic ADP-ribose.
Nishiyama, A; Ozawa, T, 1997
)
0.62
" In addition, the slope factor (steepness) of the dose-response relation was lowered 4-fold."( Norepinephrine-mediated calcium signaling is altered in vascular smooth muscle of diabetic rat.
Bielefeld, DR; Cohen, RM; Ferguson, DG; Lorenz, JN; Pun, RY; Tam, ES, 1997
)
0.3
") pretreatment with calcium and thapsigargin, which increase intracellular calcium, reduced [D-Ala2,N-MePhe4,Gly-ol5]-enkephalin (DAMGO)-induced antinociception by shifting its dose-response curve to the right."( Role of intracellular calcium in modification of mu and delta opioid receptor-mediated antinociception by diabetes in mice.
Kamei, J; Nagase, H; Ohsawa, M, 1998
)
0.3
" All-or-none Ca(2+) waves obtained with increasing concentrations of norepinephrine were transformed in a dose-response relationship with a Hill coefficient close to unity after ryanodine receptor inhibition."( Norepinephrine-induced Ca(2+) waves depend on InsP(3) and ryanodine receptor activation in vascular myocytes.
Boittin, FX; Halet, G; Macrez, N; Mironneau, J, 1999
)
0.74
" The presence of exogenously added CaM (10 microg/ml) markedly increased the caffeine (5-10 mM)-induced (45)Ca(2+) release and shifted the dose-response curve of caffeine-induced (45)Ca(2+) release to the left."( Ryanodine-sensitive Ca(2+) release mechanism of rat pancreatic acinar cells is modulated by calmodulin.
Ozawa, T, 1999
)
1.75
"The rabbit inferior vena cava (IVC) is a large-capacitance vessel that displays typical contractile dose-response curves for caffeine and phenylephrine (PE)."( Asynchronous Ca(2+) waves in intact venous smooth muscle.
Lee, CH; Poburko, D; Ruehlmann, DO; van Breemen, C, 2000
)
0.31
" Within a single region we measured Ca2+ response latency and rate of rise to construct an InsP3 dose-response relationship."( Mechanisms underlying InsP3-evoked global Ca2+ signals in mouse pancreatic acinar cells.
Fogarty, KE; Kidd, JF; Thorn, P; Tuft, DA, 2000
)
0.31
" Single channel recordings and dose-response experiments revealed that at least two quinidine molecules were involved in reduction of the RyR activity."( Subconductance activity induced by quinidine and quinidinium in purified cardiac sarcoplasmic reticulum calcium release channels.
Kelly, JE; Tsushima, RG; Wasserstrom, JA, 2002
)
0.31
"5 microM) shifted the dose-response curve of ryanodine- or caffeine-induced 45Ca2+ release from the vesicles to the left."( Elucidation of the ryanodine-sensitive Ca2+ release mechanism of rat pancreatic acinar cells: modulation by cyclic ADP-ribose and FK506.
Ozawa, T, 2004
)
0.91
" A shift to the right of the dose-response curve of both cholinomimetic compounds was observed."( Ryanodine receptors are involved in muscarinic antinociception in mice.
Bartolini, A; Galeotti, N; Ghelardini, C, 2005
)
1.77
[information is derived through text-mining from research data collected from National Library of Medicine (NLM), extracted Dec-2023]

Research

Studies (2,821)

TimeframeStudies, This Drug (%)All Drugs %
pre-1990292 (10.35)18.7374
1990's1341 (47.54)18.2507
2000's906 (32.12)29.6817
2010's244 (8.65)24.3611
2020's38 (1.35)2.80
[information is prepared from research data collected from National Library of Medicine (NLM), extracted Dec-2023]

Market Indicators

Research Demand Index: 69.32

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 very strong demand-to-supply ratio for research on this compound.

MetricThis Compound (vs All)
Research Demand Index69.32 (24.57)
Research Supply Index7.97 (2.92)
Research Growth Index4.90 (4.65)
Search Engine Demand Index123.16 (26.88)
Search Engine Supply Index2.00 (0.95)

This Compound (69.32)

All Compounds (24.57)

Study Types

Publication TypeThis drug (%)All Drugs (%)
Trials3 (0.10%)5.53%
Reviews62 (2.14%)6.00%
Case Studies7 (0.24%)4.05%
Observational0 (0.00%)0.25%
Other2,822 (97.51%)84.16%
[information is prepared from research data collected from National Library of Medicine (NLM), extracted Dec-2023]