Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:Q9UIJ5 (Rec)
 58,342 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Mutagenicities of Etoposide (VP 16-213) and Teniposide (VM-26), podophyllotoxin derivatives with antitumor activity, were studied by Rec-assay, Salmonella/microsome reverse mutation assay (Ames' test) and Micronucleus test. In the Rec-assay, both Etoposide and Teniposide showed positive results on B. subtilis H17 rec+ and M45 rec-. They also induced the revertants of S. typhimurium TA 98, TA 1537 and TA 1538, but not of S. typhimurium TA 100, TA 1535 or E. coli WP2 uvrA in the Reverse mutation test. The results were not influenced by the addition of S-9 Mix. In the Micronucleus test, Etoposide and Teniposide induced significantly micronucleated polychromatic erythrocytes of the bone marrow cells in mice; 3.3-4.3% at the doses of 0.75-6 mg/kg and 4.0-6.1% at 0.5-4 mg/kg, respectively. These results indicate that Etoposide and Teniposide are both mutagenic.
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PMID:[Mutagenicity tests of etoposide and teniposide]. 376 99

Etoposide is a podophyllotoxin semiderivative that is used in a variety of chemotherapy treatments, including therapy for children tumors. This drug promotes the formation of a ternary DNA-topoisomerase II-etoposide complex that triggers apoptosis. The purpose of this work was to analyze the occurrence of apoptosis in the seminiferous epithelium of prepubertal, pubertal, and adult rats treated with 10, 20, and 40 mg/Kg of etoposide during the prepubertal phase, as well as the role of apoptosis in etoposide-induced testicular damage. The rat testes were fixed in Bouin's liquid, and the apoptotic cells were quantified by means of the hematoxylin and eosin (H&E) technique (all groups) and the terminal dUTP nick end labeling (TUNEL) method (prepubertal groups only). The results obtained from both the H&E and TUNEL methods showed an increased frequency of apoptosis in the seminiferous epithelium of treated animals, except for the subgroup that received the 10-mg/Kg dose and was sacrificed 12 hr after the treatment and for the etoposide-treated pubertal group, that did not show cells suggesting apoptosis during H&E analysis. The labeled cells were mainly primary spermatocytes and differentiated spermatogonia. The prepubertal rats showed an etoposide-dose-dependent diminution of differentiated spermatogonia. Etoposide treatment during the prepubertal phase increases the frequency of apoptosis in the seminiferous epithelium, and causes serious harm to male fertility. 2004.
Anat Rec A Discov Mol Cell Evol Biol 2004 Jul
PMID:Apoptosis and testicular alterations in albino rats treated with etoposide during the prepubertal phase. 1522 3