Hydrogen peroxide induces apoptosis in HeLa cells through mitochondrial pathway

That in HeLa cells, apoptosis is triggered by H2O2 via the mitochondrial pathway involving upregulation of p73, and its downstream target Bax

Mayank Singh; Himani Sharma; Neeta Singh

2007

Scholarcy highlights

  • Cervical cancer is the most common cancer amongst females in India and is associated with high risk HPVs, reactive oxygen species, and excessive inflammation in most cases
  • ROS in turn affects the expression of pro- and anti-apoptotic proteins
  • The objective of the present study was to elucidate the effect of hydrogen peroxide on apoptotic signaling molecules in vitro
  • HeLa cell line expresses the Human papilloma virus – 18, E6 oncoprotein which causes the ubiquitin mediated degradation of p53 protein and is p53 deficient. p53 is known to act as a cellular stress sensor and triggers apoptosis. p73, a member of the p53 family induces apoptosis in response to DNA damaging agents but unlike p53, it is infrequently mutated in human tumors
  • That in HeLa cells, apoptosis is triggered by H2O2 via the mitochondrial pathway involving upregulation of p73, and its downstream target Bax
  • This was accompanied by upregulation of ERK, JNK, c-Myc, Hsp-70 and down regulation of anti-apoptotic Bcl-XL, release of cytochrome c from mitochondria and activation of caspases-9 and -3

Need more features? Save interactive summary cards to your Scholarcy Library.