Vinylic telluride derivatives as promising pharmacological compounds with low toxicity.
J Appl Toxicol
; 28(7): 839-48, 2008 Oct.
Article
in En
| MEDLINE
| ID: mdl-18344192
ABSTRACT
The aim of the present study was to evaluate pharmacological and toxicological properties of (Z)-2-(methylthio)-1-(butyltelluro)-1-phenylethene 1a, (Z)-1-(4-methylphenylsulfonyl)-2-(phenyltelluro)-2-phenylethene 1b, (Z)-2-(butyltelluro)-1-(benzylthio)-1-heptene 1c and (Z)-2-(phenylthio)-1-(butyltelluro)-1-phenylethene 1d. In vitro, vinylic telluride derivatives 1a, 1d and 1c were more effective in reducing lipid peroxidation than compound 1b. The maximal inhibitory effect of vinylic telluride derivatives on lipid peroxidation was in the following order 1a = 1d > 1c > 1b. Compound 1b was more potent in inhibiting delta-ALA-D activity (delta-aminolevulinate dehydratase) than compounds 1c and 1d. Based on the in vitro properties presented by compounds 1a (an antioxidant) and 1b (a pro-oxidant), toxicological parameters were assessed in vivo and ex vivo in rats. Calculated LD50 of compounds 1a and 1b, administered by oral route, were 20.5 and 1.44 micromol kg(-1), respectively. Compound 1b induced behavioral alterations in the open field test. Renal and spleenic delta-ALA-D activities were inhibited in rats treated orally with compound 1a. Compound 1b stimulated delta-ALA-D activity in liver and spleen of rats. Rats treated with compound 1b had increased hepatic, renal and spleenic lipid peroxidation. Renal and hepatic markers were not altered when compounds 1a and 1b were administered to rats at doses of around LD50, while compound 1a at high doses changed aspartate aminotransferase activity and urea levels. Based on in vitro results, this study demonstrated that compounds 1a and 1d are promising antioxidant compounds. Ex vivo data reinforce compound 1a as a promising drug for more detailed pharmacological studies.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Organometallic Compounds
/
Tellurium
/
Antioxidants
Limits:
Animals
Language:
En
Journal:
J Appl Toxicol
Year:
2008
Document type:
Article
Affiliation country:
Brazil