File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1016/0010-7824(82)90150-0
- Scopus: eid_2-s2.0-0020365086
- PMID: 7160182
- WOS: WOS:A1982PW85200008
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Inhibition of catechol-O-methyltransferase by gossypol: The effect of plasma proteins
Title | Inhibition of catechol-O-methyltransferase by gossypol: The effect of plasma proteins |
---|---|
Authors | |
Issue Date | 1982 |
Publisher | Elsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/contraception |
Citation | Contraception, 1982, v. 26 n. 5, p. 515-519 How to Cite? |
Abstract | Catechol-O-methyltransferase (COMT) is a key enzyme in the metabolism of catecholamines. As gossypol, a recent male contraceptive, has been reported to inhibit some respiratory enzymes in vitro, we have studied its effect on rat liver COMT activity. Varying concentrations of gossypol acetic acid were incubated with 3H-methyl-S-adenosyl-methionine, COMT, and different concentrations of norepinephrine. It was found that addition of gossypol into the incubation medium greatly depressed COMT activity, with an I 50 of 0.01 mM. A series of inhibitory curves constructed from using different concentrations of the substrate suggested that the inhibition was non-competitive. Addition of blood serum or BSA significantly reduced the inhibitory effect of gossypol. We concluded that gossypol may markedly decrease COMT activity through non-competitive inhibition. Since various organs of the rat have been shown to accumulate gossypol, ingestion of gossypol for the purpose of fertility control may have important effects on the metabolism of catecholamine. |
Persistent Identifier | http://hdl.handle.net/10722/171476 |
ISSN | 2021 Impact Factor: 3.051 2020 SCImago Journal Rankings: 2.040 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Tang, F | en_US |
dc.contributor.author | Tsang, AYF | en_US |
dc.contributor.author | Lee, C | en_US |
dc.contributor.author | Wong, PYD | en_US |
dc.date.accessioned | 2012-10-30T06:15:21Z | - |
dc.date.available | 2012-10-30T06:15:21Z | - |
dc.date.issued | 1982 | en_US |
dc.identifier.citation | Contraception, 1982, v. 26 n. 5, p. 515-519 | en_US |
dc.identifier.issn | 0010-7824 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/171476 | - |
dc.description.abstract | Catechol-O-methyltransferase (COMT) is a key enzyme in the metabolism of catecholamines. As gossypol, a recent male contraceptive, has been reported to inhibit some respiratory enzymes in vitro, we have studied its effect on rat liver COMT activity. Varying concentrations of gossypol acetic acid were incubated with 3H-methyl-S-adenosyl-methionine, COMT, and different concentrations of norepinephrine. It was found that addition of gossypol into the incubation medium greatly depressed COMT activity, with an I 50 of 0.01 mM. A series of inhibitory curves constructed from using different concentrations of the substrate suggested that the inhibition was non-competitive. Addition of blood serum or BSA significantly reduced the inhibitory effect of gossypol. We concluded that gossypol may markedly decrease COMT activity through non-competitive inhibition. Since various organs of the rat have been shown to accumulate gossypol, ingestion of gossypol for the purpose of fertility control may have important effects on the metabolism of catecholamine. | en_US |
dc.language | eng | en_US |
dc.publisher | Elsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/contraception | en_US |
dc.relation.ispartof | Contraception | en_US |
dc.subject.mesh | Animals | en_US |
dc.subject.mesh | Blood Proteins - Metabolism | en_US |
dc.subject.mesh | Catechol O-Methyltransferase - Antagonists & Inhibitors | en_US |
dc.subject.mesh | Catecholamines - Metabolism | en_US |
dc.subject.mesh | Gossypol - Analogs & Derivatives - Pharmacology | en_US |
dc.subject.mesh | Liver - Metabolism | en_US |
dc.subject.mesh | Rats | en_US |
dc.subject.mesh | Spermatocidal Agents - Pharmacology | en_US |
dc.title | Inhibition of catechol-O-methyltransferase by gossypol: The effect of plasma proteins | en_US |
dc.type | Article | en_US |
dc.identifier.email | Tang, F:ftang@hkucc.hku.hk | en_US |
dc.identifier.authority | Tang, F=rp00327 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1016/0010-7824(82)90150-0 | - |
dc.identifier.pmid | 7160182 | - |
dc.identifier.scopus | eid_2-s2.0-0020365086 | en_US |
dc.identifier.volume | 26 | en_US |
dc.identifier.issue | 5 | en_US |
dc.identifier.spage | 515 | en_US |
dc.identifier.epage | 519 | en_US |
dc.identifier.isi | WOS:A1982PW85200008 | - |
dc.publisher.place | United States | en_US |
dc.identifier.scopusauthorid | Tang, F=7201979770 | en_US |
dc.identifier.scopusauthorid | Tsang, AYF=7006979237 | en_US |
dc.identifier.scopusauthorid | Lee, C=7410144896 | en_US |
dc.identifier.scopusauthorid | Wong, PYD=7403980262 | en_US |
dc.identifier.issnl | 0010-7824 | - |