The role of Bax-inhibiting peptide in retinal ganglion cell apoptosis after optic nerve transection.
Bax, a pro-apoptotic member of Bcl-2 family proteins, plays a central role in mitochondria-dependent apoptosis. Bax normally resides in the cytosol in a quiescent state. Bax-inhibiting peptide (BIP) is a membrane permeable peptide comprised of five amino acids designed from the Bax-binding domain of Ku70 [M. Sawada, P. Hayes, S. Matsuyama, Cytoprotective membrane-permeable peptides designed from the Bax-binding domain of Ku70, Nat. Cell Biol. 5 (2003) 352-357]. It inhibits Bax-mediated translocation of cytochrome c and suppresses mitochondria-dependent apoptosis. BIP was used in order to elucidate its role in preventing retinal ganglion cell (RGC) death from apoptosis after optic nerve transection (ONT) in adult Wistar rats. RGC survival was significantly higher in animals with intravitreal injection of BIP, when compared with control animals. These findings suggest that BIP prevented RGC apoptosis after ONT prompting the suggestion that Bax plays a central role in RGC apoptosis after ONT.
Qin
Qiong
Q
Department of Ophthalmology, Cell Biology and Anatomy, New York Medical College, Valhalla, NY 10595, USA.
Patil
Kiran
K
Sharma
Sansar C
SC
D000595:Amino Acid Sequence / Q000235:genetics; D000818:Animals; D017209:Apoptosis / Q000187:drug effects* / Q000502:physiology; D005260:Female; D020221:Optic Nerve Injuries / Q000378:metabolism*; D010446:Peptide Fragments / Q000235:genetics / Q000494:pharmacology*; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000037:antagonists & inhibitors* / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D012165:Retinal Ganglion Cells / Q000187:drug effects* / Q000378:metabolism; D051028:bcl-2-Associated X Protein
C494828:Bax protein, rat; D010446:Peptide Fragments; D019253:Proto-Oncogene Proteins c-bcl-2; D051028:bcl-2-Associated X Protein