Phosphodiesterase inhibition and lipolytic action of the stereoisomers of trimetoquinol

M. T. Piascik, D. D. Miller, D. R. Feller

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


The isomers and racemate of trimetoquinol [TMQ; 6 7 dihydroxy 1 (3',4',5' trimethoxybenzyl) 1,2,3,4 tetrahydroisoquinoline] as well as N (3',4',5' trimethoxyphenethyl) dopamine were all shown to be effective at promoting glycerol release from rat epididymal fat tissue. The rank order of potency observed for these compounds was (-) TMQ ≥ (±) TMQ >> (+) TMQ = N (3 trimethoxyphenethyl) dopamine. (±) TMQ and (-) TMQ were the only agents capable of producing a maximal lipolytic response. None of the compounds tested were able to exhibit significant c AMP phosphodiesterase inhibition. This study is the first report which shows that the β adrenoceptor activity of the isomers of TMQ does not correlate with an inhibition of c AMP phosphodiesterase. An alternate mechanism of action for these compounds is proposed.

Original languageEnglish
Pages (from-to)203-215
Number of pages13
JournalResearch Communications in Chemical Pathology and Pharmacology
Issue number2
StatePublished - 1976

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Toxicology
  • Pharmacology
  • Pharmacology, Toxicology and Pharmaceutics (all)


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