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Antiradical Activity of Some Antiulcer and Local-Anaesthetic Active Substances
ANTIRADIKÁLOVÁ AKTIVITA NĚKTERÝCHANTIULCERÓZNĚ A LOKÁLNĚ ANESTETICKYÚČINNÝCH LÁTEK
Spektrofotometricky byla metodou změn absorbance difenyl-p-pikrylhydrazylu stanovena schopnost vychytávat volné radikály hydrochloridu (±)-trans-2-(1-pyrrolidinyl-) cyklohexylesteru kyselin3-(n)-pentyloxykarbanilové, pentakainu (trapenkain I.N.N.) a jeho derivátu, dále lidokainu, stobadinu, manitolu a kyseliny askorbové. Nejvyšší antiradikálovou aktivitu prokázal trapenkain, vyššínež porovnávací standardy stobadin, kyselina askorbová a manitol. Zavedení methylenu do hydrofilní části molekuly trapenkainu se porovnáním s trapenkainem neukázalo výhodným (stereoiso-mery P-18, P-20), ale cis isomer je antiradikálovi aktivnijší než trans-isomer. Výsledky ukázaly naexistenci vztahu mezi chemickou strukturou, antiradikálovou aktivitou a gastricko-cytoprotektivním účinkem.
Klíčová slova:
trapenkain - lidokain - stobadin - antiradikálová aktivita - gastricko-cytoprotektivní aktivita
Authors: J. Dovolil; L. Beneš
Authors‘ workplace: Ústav chemických léčiv Farmaceutické fakulty Veterinární a farmaceutické univerzity, Brno
Published in: Čes. slov. Farm., 2001; , 203-205
Category:
Overview
The free radical scavenging effect of the hydrochloride of (±)-trans-2-(1-pyrrolidinyl-) cyclohexylesterof 3-(n)-pentyloxy carbanilic acid, pentacaine (trapencaine I.N.N), and its derivatives and othersubstances, lidocaine, stobadine, mannitol, and ascorbic acid was tested in the presence of diphenyl-p-picrylhydrazyl (decrease in absorbance). In this method, more pronounced antiradical activitywas observed with trapencaine, more effective than stobadine, ascorbate, and mannitol. Trapen-caine derivatives and lidocaine were less effective in comparison with trapencaine. After introducinga methylene group into the hydrophilic moiety of the trapencaine molecule (stereoisomers P-18,P-20), there was a loss of antiradical activity, but the cis-isomer is more effective than thetransisomer. The results demonstrate the existence of relationships between the chemical structure,antiradical and gastric-cytoprotective activity.
Key words:
trapencaine - lidocaine - stobadine - antiradical activity - gastrocytoprotective activity
Labels
Pharmacy Clinical pharmacology
Article was published inCzech and Slovak Pharmacy
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