PMID- 12565195 OWN - NLM STAT- MEDLINE DCOM- 20030328 LR - 20220330 IS - 0378-4274 (Print) IS - 0378-4274 (Linking) VI - 138 IP - 3 DP - 2003 Mar 3 TI - Zearalenone induces male germ cell apoptosis in rats. PG - 185-92 AB - Zearalenone (ZEA), a nonsteroidal estrogenic mycotoxin, is known to cause toxicity of testis in male rats. To investigate whether apoptosis is involved in ZEA-induced testicular toxicity and to identify the stage and target germ cell type, 10-week-old Sprague-Dawley male rats were treated with a single intraperitoneal (i.p.) dose of ZEA (5 mg/kg) and euthanized at 3, 6, 12, 24, or 48 h subsequently. Histopathologically, germ cell degeneration was found at stages I-VI 12 h after dosing. Degenerating germ cells were shown to undergo apoptosis as revealed by in situ terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL). The frequency of TUNEL-labeled germ cells increased in a stage-specific manner, the peak frequency gradually progressing at stages I-VI of seminiferous tubules with time after dosing, suggesting that the damaged germ cells, especially spermatogonia and spermatocytes, gradually underwent the processes leading to apoptosis. DNA laddering on gel electrophoresis was apparent 12 h after dosing. The results demonstrated that a single dose of ZEA induces testicular germ cell apoptosis in a time-dependent and stage-specific pattern. This study has established that apoptosis is the principal mechanism contributing to germ cell depletion and testicular atrophy following ZEA exposure. CI - Copyright 2002 Elsevier Science Ireland Ltd. FAU - Kim, Il-Hwan AU - Kim IH AD - Korea Institute of Toxicology, PO Box 123, 100 Jang-dong, Yuseong-gu, Daejeon 305-600, South Korea. FAU - Son, Hwa-Young AU - Son HY FAU - Cho, Sung-Whan AU - Cho SW FAU - Ha, Chang-Su AU - Ha CS FAU - Kang, Boo-Hyon AU - Kang BH LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - Toxicol Lett JT - Toxicology letters JID - 7709027 RN - 0 (Estrogens, Non-Steroidal) RN - 5W827M159J (Zearalenone) SB - IM MH - Animals MH - Apoptosis/*drug effects MH - DNA Fragmentation/drug effects MH - Electrophoresis, Agar Gel MH - Estrogens, Non-Steroidal/*toxicity MH - Histocytochemistry MH - In Situ Nick-End Labeling MH - Male MH - Rats MH - Rats, Sprague-Dawley MH - Seminiferous Tubules/pathology MH - Spermatocytes/*drug effects/pathology MH - Spermatogonia/*drug effects/pathology MH - Zearalenone/*toxicity EDAT- 2003/02/05 04:00 MHDA- 2003/03/29 05:00 CRDT- 2003/02/05 04:00 PHST- 2003/02/05 04:00 [pubmed] PHST- 2003/03/29 05:00 [medline] PHST- 2003/02/05 04:00 [entrez] AID - S0378427402004058 [pii] AID - 10.1016/s0378-4274(02)00405-8 [doi] PST - ppublish SO - Toxicol Lett. 2003 Mar 3;138(3):185-92. doi: 10.1016/s0378-4274(02)00405-8.