Page last updated: 2024-12-07

procyanidin b2

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Description

procyanidin B2 : A proanthocyanidin consisting of two molecules of (-)-epicatechin joined by a bond between positions 4 and 8' in a beta-configuration. Procyanidin B2 can be found in Cinchona pubescens (Chinchona, in the rind, bark and cortex), in Cinnamomum verum (Ceylon cinnamon, in the rind, bark and cortex), in Crataegus monogyna (Common hawthorn, in the flower and blossom), in Uncaria guianensis (Cat's claw, in the root), in Vitis vinifera (Common grape vine, in the leaf), in Litchi chinensis (litchi, in the pericarp), in the apple, in Ecdysanthera utilis and in red wine. [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
CinchonagenusA genus of rubiaceous South American trees that yields the toxic CINCHONA ALKALOIDS from their bark; QUININE; QUINIDINE; chinconine, cinchonidine and others are used to treat MALARIA and CARDIAC ARRHYTHMIAS.[MeSH]RubiaceaeThe Madder plant family of the order Gentianales (formerly Rubiales), subclass Asteridae, class Magnoliopsida includes important medicinal plants that provide QUININE; IPECAC; and COFFEE. They have opposite leaves and interpetiolar stipules.[MeSH]
LitchigenusA plant genus of the family SAPINDACEAE that bears sweet fruits. Unusual fatty acids such as cyclopropanoic fatty acids have been identified in the seeds.[MeSH]SapindaceaeThe soapberry plant family of the order Sapindales, subclass Rosidae, class Magnoliopsida. Some members contain SAPONINS.[MeSH]
VitisgenusA plant genus in the family Vitaceae. It is a woody vine cultivated worldwide. It is best known for grapes, the edible fruit and used to make WINE and raisins.[MeSH]VitaceaeA plant family of the order Rhamnales, subclass Rosidae, class Magnoliopsida, best known for the VITIS genus, the source of grapes.[MeSH]
Cinchona pubescensspecies[no description available]RubiaceaeThe Madder plant family of the order Gentianales (formerly Rubiales), subclass Asteridae, class Magnoliopsida includes important medicinal plants that provide QUININE; IPECAC; and COFFEE. They have opposite leaves and interpetiolar stipules.[MeSH]
Cinchona pubescensspecies[no description available]RubiaceaeThe Madder plant family of the order Gentianales (formerly Rubiales), subclass Asteridae, class Magnoliopsida includes important medicinal plants that provide QUININE; IPECAC; and COFFEE. They have opposite leaves and interpetiolar stipules.[MeSH]
Crataegus monogynaspecies[no description available]RosaceaeThe rose plant family in the order ROSALES and class Magnoliopsida. They are generally woody plants. A number of the species of this family contain cyanogenic compounds.[MeSH]
Cinnamomum verumspecies[no description available]LauraceaeA family of mainly aromatic evergreen plants in the order Laurales. The laurel family includes 2,200 species in 45 genera and from these are derived medicinal extracts, essential oils, camphor and other products.[MeSH]
Uncaria guianensisspecies[no description available]RubiaceaeThe Madder plant family of the order Gentianales (formerly Rubiales), subclass Asteridae, class Magnoliopsida includes important medicinal plants that provide QUININE; IPECAC; and COFFEE. They have opposite leaves and interpetiolar stipules.[MeSH]
Litchi chinensisspecies[no description available]SapindaceaeThe soapberry plant family of the order Sapindales, subclass Rosidae, class Magnoliopsida. Some members contain SAPONINS.[MeSH]
Vitis viniferaspecies[no description available]VitaceaeA plant family of the order Rhamnales, subclass Rosidae, class Magnoliopsida, best known for the VITIS genus, the source of grapes.[MeSH]

Cross-References

ID SourceID
PubMed CID122738
CHEMBL ID38714
CHEBI ID75632
SCHEMBL ID288579
MeSH IDM0386956

Synonyms (55)

Synonym
AKOS008901339
nsc-623097
proanthocyanidin b2
29106-49-8
procyanidin b2
(+)-procyanidin b2
(-)-epicatechin-(4.beta.-8)-(-)-epicatechin
procyanidol b2
[4,8'-bi-2h-1-benzopyran]-3,3',5,5',7,7'-hexol, 2,2'-bis(3,4-dihydroxyphenyl)-3,3',4,4'-tetrahydro-, (2r,2'r,3r,3'r,4r)-
(2r,3r,4r)-2-(3,4-dihydroxyphenyl)-4-[(2r,3r)-2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-chroman-8-yl]chromane-3,5,7-triol
2,3-cis-proanthocyanidin
LMPK12030002
procyanidin b-2
CHEMBL38714 ,
chebi:75632 ,
C17639
(2r,3r)-2-(3,4-dihydroxyphenyl)-8-[(2r,3r,4r)-2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-3,4-dihydro-2h-chromen-4-yl]-3,4-dihydro-2h-chromene-3,5,7-triol
nsc 623097
l88hke854x ,
(4,8'-bi-2h-1-benzopyran)-3,3',5,5',7,7'-hexol, 2,2'-bis(3,4-dihydroxyphenyl)-3,3',4,4'-tetrahydro-, (2r-(2alpha,3alpha,4beta(2'r*,3'r*)))-
(2r-(2alpha,3alpha,4beta(2'r*,3'r*)))-2,2'-bis(3,4-dihydroxyphenyl)-3,3',4,4'-tetrahydro-(4,8'-bi-2h-1-benzopyran)-3,3',5,5',7,7'-hexol
unii-l88hke854x
procyanidin b2 [usp-rs]
(4,8'-bi-2h-1-benzopyran)-3,3',5,5',7,7'-hexol, 2,2'-bis(3,4-dihydroxyphenyl)-3,3',4,4'-tetrahydro-, (2r-(2.alpha.,3.alpha.,4.beta.(2'r*,3'r*)))-
(-)-epicatechin-(4.beta.->8)-(-)-epicatechin
procyanidin b2 dimer
procyanidin b2, (+)-
(2r-(2.alpha.,3.alpha.,4.beta.(2'r*,3'r*)))-2,2'-bis(3,4-dihydroxyphenyl)-3,3',4,4'-tetrahydro-(4,8'-bi-2h-1-benzopyran)-3,3',5,5',7,7'-hexol
(4,8'-bi-2h-1-benzopyran)-3,3',5,5',7,7'-hexol, 2,2'-bis(3,4-dihydroxyphenyl)-3,3',4,4'-tetrahydro-, (2r,2'r,3r,3'r,4r)-
SCHEMBL288579
ec-(4b,8)-ec
epicathechin-(4beta->8)-epicathechin
(2r,2'r,3r,3'r,4r)-2,2'-bis(3,4-dihydroxyphenyl)-3,3',4,4'-tetrahydro-2h,2'h-4,8'-bichromene-3,3',5,5',7,7'-hexol
XFZJEEAOWLFHDH-NFJBMHMQSA-N
procyanidinb2
procyanidin-b2
mfcd01861513
HY-N0796
procyanidin b2, analytical standard
procyanidin b2 (constituent of grape seeds oligomeric proanthocyanidins)
procyanidin b2 (usp-rs)
(-)-epicatechin-(4beta->8)-(-)-epicatechin
procyanidin dimer b2
cis,cis-4,8-bi(3,3',4',5,7-pentahydroxyflavane)
CS-5982
J-017393
(2r,2'r,3r,3'r,4r)-2,2'-bis(3,4-dihydroxyphenyl)-[4,8'-bichromane]-3,3',5,5',7,7'-hexaol
Q7247552
(2r,2'r,3r,3'r,4r)-2,2'-bis(3,4-dihydroxyphenyl)-4,8'-bichroman-3,3',5,5',7,7'-hexol
A912693
BS-49221
bdbm50553253
DTXSID701028797
4,8′-bi-[(+)-epicatechin], cis
cis′-4,8′-bi(3,3',4',5,7-pentahydroxyflavane)

Research Excerpts

Overview

Procyanidin B2 (PB2) is a naturally occurring flavonoid widely found in cocoa, red wine and grape juice. It has anti-oxidant, anti-inflammatory and anti-cancer properties.

ExcerptReferenceRelevance
"Procyanidin B2 (PB2) is a subclass of flavonoids and is widely known due to its anti-oxidant and antiinflammatory effects."( Procyanidin B2 Protects TR-iBRB2 Cells Against Hyperglyc emia Stress by Attenuating Oxidative Stress and Inflammasome Activation
Lu, Q; Pan, Y; Wang, K; Xu, Q; Zhu, X; Zou, W, 2023
)
3.07
"Procyanidin B2 is a natural antioxidant that protects against oxidative stress."( Procyanidin B2 alleviates oxidative stress-induced nucleus pulposus cells apoptosis through upregulating Nrf2 via PI3K-Akt pathway.
Jiang, LB; Li, XL; Zhang, QC; Zhang, QY; Zou, YP, 2023
)
3.07
"Procyanidin B2 (PCB2) is a naturally occurring flavonoid with anti-inflammatory activity."( Procyanidin B2 Suppresses Lipopolysaccharides-Induced Inflammation and Apoptosis in Human Type II Alveolar Epithelial Cells and Lung Fibroblasts.
Gui, S; Jiang, Y; Wang, X; Yang, W, 2020
)
2.72
"Procyanidin B2 (PB2) is a natural compound extracted from grape seeds and has strong antioxidant activity in vivo."( Procyanidin B2 Improves Oocyte Maturation and Subsequent Development in Type 1 Diabetic Mice by Promoting Mitochondrial Function.
Du, X; Fu, X; Hou, Y; Huang, Z; Li, J; Luo, Y; Zhuan, Q, 2020
)
2.72
"Procyanidin B2 (PB2) is a flavonoid extract abundant in grape seeds with anti-oxidant, anti-inflammatory and anti-cancer properties."( Procyanidin B2 inhibits the activation of hepatic stellate cells and angiogenesis via the Hedgehog pathway during liver fibrosis.
Chen, J; Chen, K; Dai, W; Fan, X; Feng, J; Guo, C; Ji, J; Li, J; Li, S; Liu, T; Mao, Y; Wang, C; Wang, F; Wu, J; Wu, L; Yu, Q; Zhang, J; Zhou, Y, 2019
)
2.68
"Procyanidin B2 (PB2) is a naturally occurring flavonoid widely found in cocoa, red wine and grape juice. "( Procyanidin B2 induces Nrf2 translocation and glutathione S-transferase P1 expression via ERKs and p38-MAPK pathways and protect human colonic cells against oxidative stress.
Bravo, L; Goya, L; Martín, MÁ; Ramos, S; Rodríguez-Ramiro, I, 2012
)
3.26

Effects

Procyanidin B2 (PB2) has anti-inflammatory and antioxidant properties.

ExcerptReferenceRelevance
"Procyanidin B2 (PB2) has anti-inflammatory and antioxidant properties."( Procyanidin B2 Attenuates Sepsis-Induced Acute Lung Injury via Regulating Hippo/Rho/PI3K/NF-κB Signaling Pathway.
Bae, JS; Kim, GO; Park, DH, 2023
)
3.07
"Procyanidin B2 has demonstrated several health benefits and medical properties. "( Protective Effect of Procyanidin B2 against CCl4-Induced Acute Liver Injury in Mice.
Guan, SW; Hua, ZC; Yang, BY; Zhang, XY, 2015
)
2.18

Actions

ExcerptReferenceRelevance
"Procyanidin B2 (PCB2) can increase the levels of anti-inflammatory and immune mediators."( The miR-145-5p/CD36 pathway mediates PCB2-induced apoptosis in MCF-7 cells.
Chen, Z; Liang, J; Liu, J; Wang, M; Wu, H; Wu, Q; Xing, Q; Xue, C; Yuan, Y; Zhang, L, 2021
)
2.06

Pharmacokinetics

ExcerptReferenceRelevance
" The present pharmacokinetic study was designed to find out whether the improved water solubility in the presence of procyanidin B2 or hyperoside is correlated to increased plasma levels of hypericin."( Plasma levels of hypericin in presence of procyanidin B2 and hyperoside: a pharmacokinetic study in rats.
Butterweck, V; Liefländer-Wulf, U; Nahrstedt, A; Winterhoff, H, 2003
)
0.79
" A pharmacokinetic study measured total radioactivity in the blood (n = 9)."( In vivo bioavailability, absorption, excretion, and pharmacokinetics of [14C]procyanidin B2 in male rats.
Barron, D; Brown, JE; Clifford, MN; King, LJ; Stoupi, S; Viton, F; Williamson, G, 2010
)
0.59

Bioavailability

Procyanidin B2 [epicatechin-(4beta-8)-epicateschin] was administered to rats. Absolute bioavailability of (14)C was calculated as approximately 82% using the values for total urinary ( 14)C.

ExcerptReferenceRelevance
"We evaluated the bioavailability and plasma antioxidative activity after administration of procyanidin B2 [epicatechin-(4beta-8)-epicatechin] in rats."( Absorption and urinary excretion of procyanidin B2 [epicatechin-(4beta-8)-epicatechin] in rats.
Baba, S; Natsume, M; Osakabe, N; Terao, J, 2002
)
0.81
" Both compounds increased the oral bioavailability of hypericin by ca."( Plasma levels of hypericin in presence of procyanidin B2 and hyperoside: a pharmacokinetic study in rats.
Butterweck, V; Liefländer-Wulf, U; Nahrstedt, A; Winterhoff, H, 2003
)
0.58
" Absolute bioavailability of (14)C from [(14)C]procyanidin B2 was calculated as approximately 82% using the values for total urinary (14)C."( In vivo bioavailability, absorption, excretion, and pharmacokinetics of [14C]procyanidin B2 in male rats.
Barron, D; Brown, JE; Clifford, MN; King, LJ; Stoupi, S; Viton, F; Williamson, G, 2010
)
0.85
" Unlike the flavanol monomers EC and ECG, therefore, B2G2 bioavailability should not be limited by metabolism."( Glucuronidation and methylation of procyanidin dimers b2 and 3,3″-di-o-galloyl-b2 and corresponding monomers epicatechin and 3-o-galloyl-epicatechin in mouse liver.
Agarwal, C; Agarwal, R; Gu, M; Shrestha, SP; Thompson, JA; Wempe, MF, 2012
)
0.38
" According to present literature C-glycosylated flavones and oligomeric procyanidins are considered to be the active ingredients, despite the fact that no systematic data are available on systemic bioavailability of proanthocyanidins after oral intake."( In vitro intestinal transport of oligomeric procyanidins (DP 2 to 4) across monolayers of Caco-2 cells.
Deters, A; Hensel, A; Zumdick, S, 2012
)
0.38
" Our results suggest that polyphenolic compounds might be potential structural bases and source to find and project nature-based, safe, orally bioavailable direct thrombin inhibitors."( Thrombin inhibitory activity of some polyphenolic compounds.
Bijak, M; Krotkiewski, H; Nowak, P; Pawlaczyk, I; Ponczek, M; Saluk, J; Wachowicz, B; Ziewiecki, R, 2014
)
0.4
"Studying bioavailability of polyphenols is essential to understand the health effects of these compounds."( Experimental confounding factors affecting stability, transport and metabolism of flavanols and hydroxycinnamic acids in Caco-2 cells.
Bravo-Clemente, L; Gómez-Juaristi, M; Goya, L; Mateos, R; Sarria, B, 2020
)
0.56

Dosage Studied

ExcerptRelevanceReference
" After intravenous or oral administration the terminal half-lives were similar, whereas 8-fold larger values were obtained after oral dosing for total clearance and the apparent volumes of distribution."( In vivo bioavailability, absorption, excretion, and pharmacokinetics of [14C]procyanidin B2 in male rats.
Barron, D; Brown, JE; Clifford, MN; King, LJ; Stoupi, S; Viton, F; Williamson, G, 2010
)
0.59
" B2G2 was partially absorbed intact in mice after oral dosing and did not undergo significant metabolism."( Glucuronidation and methylation of procyanidin dimers b2 and 3,3″-di-o-galloyl-b2 and corresponding monomers epicatechin and 3-o-galloyl-epicatechin in mouse liver.
Agarwal, C; Agarwal, R; Gu, M; Shrestha, SP; Thompson, JA; Wempe, MF, 2012
)
0.38
[information is derived through text-mining from research data collected from National Library of Medicine (NLM), extracted Dec-2023]

Roles (2)

RoleDescription
metaboliteAny intermediate or product resulting from metabolism. The term 'metabolite' subsumes the classes commonly known as primary and secondary metabolites.
antioxidantA substance that opposes oxidation or inhibits reactions brought about by dioxygen or peroxides.
[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 (4)

ClassDescription
hydroxyflavanA member of the class of flavans in which one or more ring hydrogens are replaced by hydroxy groups.
proanthocyanidinA flavonoid oligomer obtained by the the condensation of two or more units of hydroxyflavans.
biflavonoidA flavonoid oligomer that is obtained by the oxidative coupling of at least two units of aryl-substituted benzopyran rings or its substituted derivatives, resulting in the two ring systems being joined together by a single atom or bond.
polyphenolMembers of the class of phenols that contain 2 or more benzene rings each of which is substituted by at least one hydroxy 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 (2)

Inhibition Measurements

ProteinTaxonomyMeasurementAverageMin (ref.)Avg (ref.)Max (ref.)Bioassay(s)
Alpha-synucleinHomo sapiens (human)IC50 (µMol)4.30000.19003.82049.8000AID1695729
[prepared from compound, protein, and bioassay information from National Library of Medicine (NLM), extracted Dec-2023]

Other Measurements

ProteinTaxonomyMeasurementAverageMin (ref.)Avg (ref.)Max (ref.)Bioassay(s)
LactoperoxidaseBos taurus (cattle)Km0.37000.30001.57788.4100AID1490876
[prepared from compound, protein, and bioassay information from National Library of Medicine (NLM), extracted Dec-2023]

Biological Processes (82)

Processvia Protein(s)Taxonomy
calcium ion homeostasisAlpha-synucleinHomo sapiens (human)
negative regulation of transcription by RNA polymerase IIAlpha-synucleinHomo sapiens (human)
microglial cell activationAlpha-synucleinHomo sapiens (human)
positive regulation of receptor recyclingAlpha-synucleinHomo sapiens (human)
positive regulation of neurotransmitter secretionAlpha-synucleinHomo sapiens (human)
negative regulation of protein kinase activityAlpha-synucleinHomo sapiens (human)
fatty acid metabolic processAlpha-synucleinHomo sapiens (human)
neutral lipid metabolic processAlpha-synucleinHomo sapiens (human)
phospholipid metabolic processAlpha-synucleinHomo sapiens (human)
activation of cysteine-type endopeptidase activity involved in apoptotic processAlpha-synucleinHomo sapiens (human)
mitochondrial membrane organizationAlpha-synucleinHomo sapiens (human)
adult locomotory behaviorAlpha-synucleinHomo sapiens (human)
response to xenobiotic stimulusAlpha-synucleinHomo sapiens (human)
response to iron(II) ionAlpha-synucleinHomo sapiens (human)
regulation of phospholipase activityAlpha-synucleinHomo sapiens (human)
negative regulation of platelet-derived growth factor receptor signaling pathwayAlpha-synucleinHomo sapiens (human)
regulation of glutamate secretionAlpha-synucleinHomo sapiens (human)
regulation of dopamine secretionAlpha-synucleinHomo sapiens (human)
synaptic vesicle exocytosisAlpha-synucleinHomo sapiens (human)
synaptic vesicle primingAlpha-synucleinHomo sapiens (human)
regulation of transmembrane transporter activityAlpha-synucleinHomo sapiens (human)
negative regulation of microtubule polymerizationAlpha-synucleinHomo sapiens (human)
receptor internalizationAlpha-synucleinHomo sapiens (human)
protein destabilizationAlpha-synucleinHomo sapiens (human)
response to magnesium ionAlpha-synucleinHomo sapiens (human)
negative regulation of transporter activityAlpha-synucleinHomo sapiens (human)
response to lipopolysaccharideAlpha-synucleinHomo sapiens (human)
negative regulation of monooxygenase activityAlpha-synucleinHomo sapiens (human)
positive regulation of peptidyl-serine phosphorylationAlpha-synucleinHomo sapiens (human)
response to type II interferonAlpha-synucleinHomo sapiens (human)
cellular response to oxidative stressAlpha-synucleinHomo sapiens (human)
SNARE complex assemblyAlpha-synucleinHomo sapiens (human)
positive regulation of SNARE complex assemblyAlpha-synucleinHomo sapiens (human)
regulation of locomotionAlpha-synucleinHomo sapiens (human)
dopamine biosynthetic processAlpha-synucleinHomo sapiens (human)
mitochondrial ATP synthesis coupled electron transportAlpha-synucleinHomo sapiens (human)
regulation of macrophage activationAlpha-synucleinHomo sapiens (human)
positive regulation of apoptotic processAlpha-synucleinHomo sapiens (human)
negative regulation of apoptotic processAlpha-synucleinHomo sapiens (human)
negative regulation of cysteine-type endopeptidase activity involved in apoptotic processAlpha-synucleinHomo sapiens (human)
negative regulation of neuron apoptotic processAlpha-synucleinHomo sapiens (human)
positive regulation of endocytosisAlpha-synucleinHomo sapiens (human)
negative regulation of exocytosisAlpha-synucleinHomo sapiens (human)
positive regulation of exocytosisAlpha-synucleinHomo sapiens (human)
regulation of long-term neuronal synaptic plasticityAlpha-synucleinHomo sapiens (human)
synaptic vesicle endocytosisAlpha-synucleinHomo sapiens (human)
synaptic vesicle transportAlpha-synucleinHomo sapiens (human)
positive regulation of inflammatory responseAlpha-synucleinHomo sapiens (human)
regulation of acyl-CoA biosynthetic processAlpha-synucleinHomo sapiens (human)
protein tetramerizationAlpha-synucleinHomo sapiens (human)
positive regulation of release of sequestered calcium ion into cytosolAlpha-synucleinHomo sapiens (human)
neuron apoptotic processAlpha-synucleinHomo sapiens (human)
dopamine uptake involved in synaptic transmissionAlpha-synucleinHomo sapiens (human)
negative regulation of dopamine uptake involved in synaptic transmissionAlpha-synucleinHomo sapiens (human)
negative regulation of serotonin uptakeAlpha-synucleinHomo sapiens (human)
regulation of norepinephrine uptakeAlpha-synucleinHomo sapiens (human)
negative regulation of norepinephrine uptakeAlpha-synucleinHomo sapiens (human)
excitatory postsynaptic potentialAlpha-synucleinHomo sapiens (human)
long-term synaptic potentiationAlpha-synucleinHomo sapiens (human)
positive regulation of inositol phosphate biosynthetic processAlpha-synucleinHomo sapiens (human)
negative regulation of thrombin-activated receptor signaling pathwayAlpha-synucleinHomo sapiens (human)
response to interleukin-1Alpha-synucleinHomo sapiens (human)
cellular response to copper ionAlpha-synucleinHomo sapiens (human)
cellular response to epinephrine stimulusAlpha-synucleinHomo sapiens (human)
positive regulation of protein serine/threonine kinase activityAlpha-synucleinHomo sapiens (human)
supramolecular fiber organizationAlpha-synucleinHomo sapiens (human)
negative regulation of mitochondrial electron transport, NADH to ubiquinoneAlpha-synucleinHomo sapiens (human)
positive regulation of glutathione peroxidase activityAlpha-synucleinHomo sapiens (human)
positive regulation of hydrogen peroxide catabolic processAlpha-synucleinHomo sapiens (human)
regulation of synaptic vesicle recyclingAlpha-synucleinHomo sapiens (human)
regulation of reactive oxygen species biosynthetic processAlpha-synucleinHomo sapiens (human)
positive regulation of protein localization to cell peripheryAlpha-synucleinHomo sapiens (human)
negative regulation of chaperone-mediated autophagyAlpha-synucleinHomo sapiens (human)
regulation of presynapse assemblyAlpha-synucleinHomo sapiens (human)
amyloid fibril formationAlpha-synucleinHomo sapiens (human)
synapse organizationAlpha-synucleinHomo sapiens (human)
chemical synaptic transmissionAlpha-synucleinHomo sapiens (human)
response to oxidative stressLactoperoxidaseBos taurus (cattle)
thiocyanate metabolic processLactoperoxidaseBos taurus (cattle)
antibacterial humoral responseLactoperoxidaseBos taurus (cattle)
hydrogen peroxide catabolic processLactoperoxidaseBos taurus (cattle)
cellular oxidant detoxificationLactoperoxidaseBos taurus (cattle)
[Information is prepared from geneontology information from the June-17-2024 release]

Molecular Functions (30)

Processvia Protein(s)Taxonomy
fatty acid bindingAlpha-synucleinHomo sapiens (human)
phospholipase D inhibitor activityAlpha-synucleinHomo sapiens (human)
SNARE bindingAlpha-synucleinHomo sapiens (human)
magnesium ion bindingAlpha-synucleinHomo sapiens (human)
transcription cis-regulatory region bindingAlpha-synucleinHomo sapiens (human)
actin bindingAlpha-synucleinHomo sapiens (human)
protein kinase inhibitor activityAlpha-synucleinHomo sapiens (human)
copper ion bindingAlpha-synucleinHomo sapiens (human)
calcium ion bindingAlpha-synucleinHomo sapiens (human)
protein bindingAlpha-synucleinHomo sapiens (human)
phospholipid bindingAlpha-synucleinHomo sapiens (human)
ferrous iron bindingAlpha-synucleinHomo sapiens (human)
zinc ion bindingAlpha-synucleinHomo sapiens (human)
lipid bindingAlpha-synucleinHomo sapiens (human)
oxidoreductase activityAlpha-synucleinHomo sapiens (human)
kinesin bindingAlpha-synucleinHomo sapiens (human)
Hsp70 protein bindingAlpha-synucleinHomo sapiens (human)
histone bindingAlpha-synucleinHomo sapiens (human)
identical protein bindingAlpha-synucleinHomo sapiens (human)
alpha-tubulin bindingAlpha-synucleinHomo sapiens (human)
cysteine-type endopeptidase inhibitor activity involved in apoptotic processAlpha-synucleinHomo sapiens (human)
tau protein bindingAlpha-synucleinHomo sapiens (human)
phosphoprotein bindingAlpha-synucleinHomo sapiens (human)
molecular adaptor activityAlpha-synucleinHomo sapiens (human)
dynein complex bindingAlpha-synucleinHomo sapiens (human)
cuprous ion bindingAlpha-synucleinHomo sapiens (human)
peroxidase activityLactoperoxidaseBos taurus (cattle)
calcium ion bindingLactoperoxidaseBos taurus (cattle)
heme bindingLactoperoxidaseBos taurus (cattle)
thiocyanate peroxidase activityLactoperoxidaseBos taurus (cattle)
lactoperoxidase activityLactoperoxidaseBos taurus (cattle)
[Information is prepared from geneontology information from the June-17-2024 release]

Ceullar Components (22)

Processvia Protein(s)Taxonomy
platelet alpha granule membraneAlpha-synucleinHomo sapiens (human)
extracellular regionAlpha-synucleinHomo sapiens (human)
extracellular spaceAlpha-synucleinHomo sapiens (human)
nucleusAlpha-synucleinHomo sapiens (human)
cytoplasmAlpha-synucleinHomo sapiens (human)
mitochondrionAlpha-synucleinHomo sapiens (human)
lysosomeAlpha-synucleinHomo sapiens (human)
cytosolAlpha-synucleinHomo sapiens (human)
plasma membraneAlpha-synucleinHomo sapiens (human)
cell cortexAlpha-synucleinHomo sapiens (human)
actin cytoskeletonAlpha-synucleinHomo sapiens (human)
membraneAlpha-synucleinHomo sapiens (human)
inclusion bodyAlpha-synucleinHomo sapiens (human)
axonAlpha-synucleinHomo sapiens (human)
growth coneAlpha-synucleinHomo sapiens (human)
synaptic vesicle membraneAlpha-synucleinHomo sapiens (human)
perinuclear region of cytoplasmAlpha-synucleinHomo sapiens (human)
postsynapseAlpha-synucleinHomo sapiens (human)
supramolecular fiberAlpha-synucleinHomo sapiens (human)
protein-containing complexAlpha-synucleinHomo sapiens (human)
cytoplasmAlpha-synucleinHomo sapiens (human)
axon terminusAlpha-synucleinHomo sapiens (human)
neuronal cell bodyAlpha-synucleinHomo sapiens (human)
extracellular spaceLactoperoxidaseBos taurus (cattle)
cytoplasmLactoperoxidaseBos taurus (cattle)
[Information is prepared from geneontology information from the June-17-2024 release]

Bioassays (60)

Assay IDTitleYearJournalArticle
AID380214Antimicrobial activity against Mycobacterium fortuitum1999Journal of natural products, Jul, Volume: 62, Issue:7
Biological evaluation of proanthocyanidin dimers and related polyphenols.
AID380218Antimicrobial activity against Escherichia coli1999Journal of natural products, Jul, Volume: 62, Issue:7
Biological evaluation of proanthocyanidin dimers and related polyphenols.
AID401340Binding affinity to bradykinin1996Journal of natural products, Feb, Volume: 59, Issue:2
Natural polyphenols (vegetable tannins) as drugs: possible modes of action.
AID380217Antimicrobial activity against Pseudomonas aeruginosa1999Journal of natural products, Jul, Volume: 62, Issue:7
Biological evaluation of proanthocyanidin dimers and related polyphenols.
AID1615687Induction of modification in human molar dentin assessed as sum of percentage of apparent modulus elasticity and percentage of collagen remaining after collagen-induced degradation at 3.5 mg2019Journal of natural products, 09-27, Volume: 82, Issue:9
Proanthocyanidin Dimers and Trimers from
AID336178Antiviral activity against Potato virus X in half leaf of Chenopodium quinoa at 9.3 mg/mL after 10 days2002Journal of natural products, Oct, Volume: 65, Issue:10
Bioactive constituents from Iryanthera megistophylla.
AID377249Antiadherent activity against P-fimbriated Escherichia coli in human erythrocyte assessed as suppression of agglutination using latex beads coated with P receptor analogue at 2.4 mg/ml2000Journal of natural products, Sep, Volume: 63, Issue:9
A-Type proanthocyanidin trimers from cranberry that inhibit adherence of uropathogenic P-fimbriated Escherichia coli.
AID1659751Agonist activity at TRPA1 (unknown origin) at 1000 uM relative to AITC2020Bioorganic & medicinal chemistry letters, 06-01, Volume: 30, Issue:11
Identification of a new class of non-electrophilic TRPA1 agonists by a structure-based virtual screening approach.
AID358165Cytotoxicity against human PRMI7951 cells by tetrazolium salt-based colorimetric assay1992Journal of natural products, Aug, Volume: 55, Issue:8
Antitumor agents, 129. Tannins and related compounds as selective cytotoxic agents.
AID380215Antimicrobial activity against Enterobacter cloacae1999Journal of natural products, Jul, Volume: 62, Issue:7
Biological evaluation of proanthocyanidin dimers and related polyphenols.
AID400992Inhibition of AMV reverse transcriptase activity assessed as incorporation of dGMP in poly(rC)-oligo(dG) at 100 uM
AID380211Antimicrobial activity against Streptococcus pyogenes1999Journal of natural products, Jul, Volume: 62, Issue:7
Biological evaluation of proanthocyanidin dimers and related polyphenols.
AID398696Inhibition of lipid peroxidation in Sprague-Dawley rat heart mitochondria assessed as inhibition of FeSO4-induced oxygen consumption1995Journal of natural products, Sep, Volume: 58, Issue:9
Effect of anthraquinone derivatives on lipid peroxidation in rat heart mitochondria: structure-activity relationship.
AID1197346Antioxidant activity in rat liver microsomes assessed as inhibition of NADPH-dependent lipid peroxidation2015European journal of medicinal chemistry, Mar-06, Volume: 92Medicinal uses, phytochemistry and pharmacology of family Sterculiaceae: a review.
AID400993Inhibition of AMV reverse transcriptase activity assessed as incorporation of dGMP in poly(rC)-oligo(dG) at 1000 uM
AID400985Inhibition of AMV reverse transcriptase activity assessed as incorporation of dTMP in poly(rA)-oligo(dT) at 1 uM
AID400991Inhibition of AMV reverse transcriptase activity assessed as incorporation of dGMP in poly(rC)-oligo(dG) at 10 uM
AID380213Antimicrobial activity against Staphylococcus aureus1999Journal of natural products, Jul, Volume: 62, Issue:7
Biological evaluation of proanthocyanidin dimers and related polyphenols.
AID380206Selectivity index, ratio of CC50 for human MT4 cells to IC50 for HIV infected in human MT4 cells1999Journal of natural products, Jul, Volume: 62, Issue:7
Biological evaluation of proanthocyanidin dimers and related polyphenols.
AID358167Cytotoxicity against human A549 cells by tetrazolium salt-based colorimetric assay1992Journal of natural products, Aug, Volume: 55, Issue:8
Antitumor agents, 129. Tannins and related compounds as selective cytotoxic agents.
AID336171Antimicrobial activity against Candida albicans after 24 hrs by disk diffusion method2002Journal of natural products, Oct, Volume: 65, Issue:10
Bioactive constituents from Iryanthera megistophylla.
AID380212Antimicrobial activity against Candida albicans1999Journal of natural products, Jul, Volume: 62, Issue:7
Biological evaluation of proanthocyanidin dimers and related polyphenols.
AID380216Antimicrobial activity against Salmonella paratyphi1999Journal of natural products, Jul, Volume: 62, Issue:7
Biological evaluation of proanthocyanidin dimers and related polyphenols.
AID380220Modulation of alternative complement pathway system assessed as hemoglobin release by spectrophotometry1999Journal of natural products, Jul, Volume: 62, Issue:7
Biological evaluation of proanthocyanidin dimers and related polyphenols.
AID400990Inhibition of AMV reverse transcriptase activity assessed as incorporation of dGMP in poly(rC)-oligo(dG) at 1 uM
AID358168Cytotoxicity against human HCT8 cells by tetrazolium salt-based colorimetric assay1992Journal of natural products, Aug, Volume: 55, Issue:8
Antitumor agents, 129. Tannins and related compounds as selective cytotoxic agents.
AID1151286Induction of morphological changes in BacLight Green labeled Escherichia coli assessed as decrease of number of fimbriae at 50 ug/ml after 1 hr by transmission electron microscopy analysis2014Journal of natural products, May-23, Volume: 77, Issue:5
Development of a fluorometric microplate antiadhesion assay using uropathogenic Escherichia coli and human uroepithelial cells.
AID400989Inhibition of AMV reverse transcriptase activity assessed as incorporation of dGMP in poly(rC)-oligo(dG) at 0.1 uM
AID380203Antioxidant activity assessed as superoxide radical anion scavenging activity1999Journal of natural products, Jul, Volume: 62, Issue:7
Biological evaluation of proanthocyanidin dimers and related polyphenols.
AID1607723Inhibition of HAT (unknown origin) relative to control2019European journal of medicinal chemistry, Sep-15, Volume: 178Histone acetyltransferase inhibitors: An overview in synthesis, structure-activity relationship and molecular mechanism.
AID1151284Inhibition of BacLight Green labeled Escherichia coli adherence to human UEC at 50 ug/ml after 1 hr by scanning electron microscopy analysis2014Journal of natural products, May-23, Volume: 77, Issue:5
Development of a fluorometric microplate antiadhesion assay using uropathogenic Escherichia coli and human uroepithelial cells.
AID768928Inhibition of human thrombin amidolytic activity using D-Phe-Pip-Arg-pNA as substrate at 0.1 to 1000 uM preincubated for 10 mins followed by substrate addition measured every 12 secs for 10 mins by spectrophotometric analysis2014Medicinal chemistry research : an international journal for rapid communications on design and mechanisms of action of biologically active agents, , Volume: 23Thrombin inhibitory activity of some polyphenolic compounds.
AID1490877Induction of H2O2-inactivated bovine milk lactoperoxidase pseudo-halogenating activity assessed as increase in hypothiocyanate formation by measuring substrate Kcat using thiocyanate as substrate by Lineweaver-Burk plot2017Journal of natural products, 05-26, Volume: 80, Issue:5
Tannins and Tannin-Related Derivatives Enhance the (Pseudo-)Halogenating Activity of Lactoperoxidase.
AID1490876Induction of H2O2-inactivated bovine milk lactoperoxidase pseudo-halogenating activity assessed as increase in hypothiocyanate formation by measuring substrate Km using thiocyanate as substrate by Lineweaver-Burk plot2017Journal of natural products, 05-26, Volume: 80, Issue:5
Tannins and Tannin-Related Derivatives Enhance the (Pseudo-)Halogenating Activity of Lactoperoxidase.
AID358166Cytotoxicity against human KB cells by tetrazolium salt-based colorimetric assay1992Journal of natural products, Aug, Volume: 55, Issue:8
Antitumor agents, 129. Tannins and related compounds as selective cytotoxic agents.
AID380204Antiviral activity against HSV up to 200 ug/mL by extracellular virucidal assay1999Journal of natural products, Jul, Volume: 62, Issue:7
Biological evaluation of proanthocyanidin dimers and related polyphenols.
AID1615689Stability in human molar dentin at 3.5 mg after 1 hr by flexural assay2019Journal of natural products, 09-27, Volume: 82, Issue:9
Proanthocyanidin Dimers and Trimers from
AID1490878Induction of H2O2-inactivated bovine milk lactoperoxidase pseudo-halogenating activity assessed as increase in hypothiocyanate formation by measuring ratio of Kcat to Km for substrate using thiocyanate as substrate by Lineweaver-Burk plot2017Journal of natural products, 05-26, Volume: 80, Issue:5
Tannins and Tannin-Related Derivatives Enhance the (Pseudo-)Halogenating Activity of Lactoperoxidase.
AID400988Inhibition of AMV reverse transcriptase activity assessed as incorporation of dTMP in poly(rA)-oligo(dT) at 1000 uM
AID456317Antioxidant activity assessed as trolox equivalent by TEAC assay2010Bioorganic & medicinal chemistry, Jan-01, Volume: 18, Issue:1
Reliability of bond dissociation enthalpy calculated by the PM6 method and experimental TEAC values in antiradical QSAR of flavonoids.
AID400987Inhibition of AMV reverse transcriptase activity assessed as incorporation of dTMP in poly(rA)-oligo(dT) at 100 uM
AID400984Inhibition of AMV reverse transcriptase activity assessed as incorporation of dTMP in poly(rA)-oligo(dT) at 0.1 uM
AID377252Antiadherent activity against P-fimbriated Escherichia coli in human erythrocyte assessed as suppression of agglutination using latex beads coated with P receptor analogue at 0.3 mg/ml2000Journal of natural products, Sep, Volume: 63, Issue:9
A-Type proanthocyanidin trimers from cranberry that inhibit adherence of uropathogenic P-fimbriated Escherichia coli.
AID338965Inhibition of PHA-stimulated human PBMC proliferation assessed as [3H]thymidine uptake after 3 days by scintillation counting2002Journal of natural products, Apr, Volume: 65, Issue:4
Immunomodulatory proanthocyanidins from Ecdysanthera utilis.
AID1197348Antioxidant activity assessed as DPPH radical scavenging activity2015European journal of medicinal chemistry, Mar-06, Volume: 92Medicinal uses, phytochemistry and pharmacology of family Sterculiaceae: a review.
AID358169Cytotoxicity against human TE671 cells by tetrazolium salt-based colorimetric assay1992Journal of natural products, Aug, Volume: 55, Issue:8
Antitumor agents, 129. Tannins and related compounds as selective cytotoxic agents.
AID377253Antiadherent activity against P-fimbriated Escherichia coli in human erythrocyte assessed as suppression of agglutination using latex beads coated with P receptor analogue at 0.15 mg/ml2000Journal of natural products, Sep, Volume: 63, Issue:9
A-Type proanthocyanidin trimers from cranberry that inhibit adherence of uropathogenic P-fimbriated Escherichia coli.
AID1151282Bactericidal activity against BacLight Green labeled Escherichia coli up to 30 ug/ml2014Journal of natural products, May-23, Volume: 77, Issue:5
Development of a fluorometric microplate antiadhesion assay using uropathogenic Escherichia coli and human uroepithelial cells.
AID336170Antimicrobial activity against Staphylococcus aureus after 24 hrs by disk diffusion method2002Journal of natural products, Oct, Volume: 65, Issue:10
Bioactive constituents from Iryanthera megistophylla.
AID377250Antiadherent activity against P-fimbriated Escherichia coli in human erythrocyte assessed as suppression of agglutination using latex beads coated with P receptor analogue at 1.2 mg/ml2000Journal of natural products, Sep, Volume: 63, Issue:9
A-Type proanthocyanidin trimers from cranberry that inhibit adherence of uropathogenic P-fimbriated Escherichia coli.
AID380219Modulation of classical complement pathway system assessed as hemoglobin release by spectrophotometry1999Journal of natural products, Jul, Volume: 62, Issue:7
Biological evaluation of proanthocyanidin dimers and related polyphenols.
AID380207Antiviral activity against HIV infected in human MT4 cells assessed as inhibition of virus-induced cytopathic effect by MTT assay1999Journal of natural products, Jul, Volume: 62, Issue:7
Biological evaluation of proanthocyanidin dimers and related polyphenols.
AID1151279Inhibition of BacLight Green labeled Escherichia coli adherence to human UEC after 1 hr by flow cytometry analysis2014Journal of natural products, May-23, Volume: 77, Issue:5
Development of a fluorometric microplate antiadhesion assay using uropathogenic Escherichia coli and human uroepithelial cells.
AID1151280Inhibition of BacLight Green labeled Escherichia coli adherence to human UEC at 1 ug/ml after 1 hr by flow cytometry analysis2014Journal of natural products, May-23, Volume: 77, Issue:5
Development of a fluorometric microplate antiadhesion assay using uropathogenic Escherichia coli and human uroepithelial cells.
AID398697Inhibition of lipid peroxidation in Sprague-Dawley rat heart mitochondria assessed as inhibition of FeSO4-induced malondialdehyde formation1995Journal of natural products, Sep, Volume: 58, Issue:9
Effect of anthraquinone derivatives on lipid peroxidation in rat heart mitochondria: structure-activity relationship.
AID380205Cytotoxicity against human MT4 cells by MTT assay1999Journal of natural products, Jul, Volume: 62, Issue:7
Biological evaluation of proanthocyanidin dimers and related polyphenols.
AID400986Inhibition of AMV reverse transcriptase activity assessed as incorporation of dTMP in poly(rA)-oligo(dT) at 10 uM
AID1615688Induction of elasticity in human molar dentin at 3.5 mg after 1 hr by flexural assay2019Journal of natural products, 09-27, Volume: 82, Issue:9
Proanthocyanidin Dimers and Trimers from
AID1695729Inhibition of human alpha-synuclein filament formation expressed in Escherichia coli BL21(DE3) cells incubated for 72 hrs by thioflavin S based fluorescence assay2019European journal of medicinal chemistry, Apr-01, Volume: 167Toward the discovery and development of effective modulators of α-synuclein amyloid aggregation.
AID377251Antiadherent activity against P-fimbriated Escherichia coli in human erythrocyte assessed as suppression of agglutination using latex beads coated with P receptor analogue at 0.6 mg/ml2000Journal of natural products, Sep, Volume: 63, Issue:9
A-Type proanthocyanidin trimers from cranberry that inhibit adherence of uropathogenic P-fimbriated Escherichia coli.
[information is prepared from bioassay data collected from National Library of Medicine (NLM), extracted Dec-2023]

Research

Studies (206)

TimeframeStudies, This Drug (%)All Drugs %
pre-19900 (0.00)18.7374
1990's6 (2.91)18.2507
2000's40 (19.42)29.6817
2010's105 (50.97)24.3611
2020's55 (26.70)2.80
[information is prepared from research data collected from National Library of Medicine (NLM), extracted Dec-2023]

Market Indicators

Research Demand Index: 48.17

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

MetricThis Compound (vs All)
Research Demand Index48.17 (24.57)
Research Supply Index5.36 (2.92)
Research Growth Index5.23 (4.65)
Search Engine Demand Index76.83 (26.88)
Search Engine Supply Index2.06 (0.95)

This Compound (48.17)

All Compounds (24.57)

Study Types

Publication TypeThis drug (%)All Drugs (%)
Trials3 (1.44%)5.53%
Reviews5 (2.40%)6.00%
Case Studies0 (0.00%)4.05%
Observational0 (0.00%)0.25%
Other200 (96.15%)84.16%
[information is prepared from research data collected from National Library of Medicine (NLM), extracted Dec-2023]