Cadmium-induced apoptosis is mediated by the translocation of AIF to the nucleus in rat testes.
Cadmium (Cd) is a highly toxic metal that affects a variety of cellular events, such as cell proliferation, differentiation and survival. Cd generates reactive oxygen species (ROS) that induce apoptosis. We previously demonstrated that Cd induces apoptosis in testicular germ cells and that apoptosis was prevented by the administration of ascorbic acid (AA), an ROS scavenger. However, little is known about the signaling pathways underlying Cd-induced apoptosis in rat testes. Here, we report that Cd-induced apoptosis in rat testes was associated with the translocation of apoptosis inducing factor (AIF) from mitochondria to the nucleus, and that this was prevented by treatment with AA. Cd-induced cleavage of poly ADP-ribose polymerase-1 (PARP-1), and this was also inhibited by treatment with AA. Taken together, these results suggest that Cd-induced ROS was responsible for the upregulation of PARP-1, the translocation of AIF to the nucleus, and apoptosis of testicular cells in rat testes.
Kim
Jisun
J
Hormone Research Center, School of Biological Science and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea.
Soh
Jaemog
J
D021581:Active Transport, Cell Nucleus; D000818:Animals; D000975:Antioxidants / Q000494:pharmacology; D017209:Apoptosis / Q000187:drug effects*; D051033:Apoptosis Inducing Factor / Q000378:metabolism*; D001205:Ascorbic Acid / Q000494:pharmacology; D019256:Cadmium Chloride / Q000633:toxicity*; D002467:Cell Nucleus / Q000187:drug effects* / Q000378:metabolism / Q000473:pathology; D008297:Male; D008928:Mitochondria / Q000187:drug effects / Q000378:metabolism; D000071137:Poly (ADP-Ribose) Polymerase-1; D011065:Poly(ADP-ribose) Polymerases / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley; D017382:Reactive Oxygen Species / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects; D013737:Testis / Q000187:drug effects* / Q000378:metabolism / Q000473:pathology; D013997:Time Factors
C494831:Aifm1 protein, rat; D000975:Antioxidants; D051033:Apoptosis Inducing Factor; D017382:Reactive Oxygen Species; C499322:Parp1 protein, rat; D000071137:Poly (ADP-Ribose) Polymerase-1; D011065:Poly(ADP-ribose) Polymerases; D019256:Cadmium Chloride; D001205:Ascorbic Acid