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Isolation and Functional Analysis of Mitochondria from Cultured Cells and Mouse Tissue
09:27

Isolation and Functional Analysis of Mitochondria from Cultured Cells and Mouse Tissue

Published on: March 23, 2015

Intestinal mitochondrial apoptotic signaling is activated during oxidative stress

Naira Baregamian1, Jun Song, John Papaconstantinou

  • 1Department of Surgery, The University of Texas Medical Branch, Galveston, TX 77555, USA.

Pediatric Surgery International
|March 15, 2011
PubMed
Abstract

Insights

Mitochondria contribute to intestinal cell death in necrotizing enterocolitis (NEC) by producing reactive oxygen species (ROS). Growth factors like IGF-1 may protect against this oxidative stress, offering potential therapeutic avenues for NEC.

Area of Science:

  • Cell Biology
  • Gastroenterology
  • Neonatal Research

Background:

  • Necrotizing enterocolitis (NEC) is a severe intestinal disease in premature infants.
  • Reactive oxygen species (ROS) are implicated in NEC pathogenesis.
  • The role of mitochondria in NEC-related apoptosis is not well understood.

Purpose of the Study:

  • Investigate the impact of oxidative stress on intestinal mitochondrial apoptotic signaling.
  • Determine the role of growth factors in mitigating oxidative stress-induced apoptosis in the intestine.

Main Methods:

  • Utilized Swiss-Webster mouse pups, RIE-1 cells, and a mitochondrial DNA-depleted RIE-1 cell line (RIE-1-ρ°).
  • Included human fetal intestinal epithelial cells (FHs74 Int).
  • Applied hydrogen peroxide (H2O2) to induce oxidative stress.

Main Results:

  • Hydrogen peroxide induced apoptosis and ROS production in intestinal cells.
  • Mitochondrial silencing in RIE-1-ρ° cells significantly reduced ROS-mediated apoptotic signaling.
  • Growth factors, particularly IGF-1, attenuated the H2O2-induced apoptotic response.

Conclusions:

  • Mitochondria are a significant source of intestinal apoptotic signaling under oxidative stress.
  • Modulating mitochondrial apoptotic pathways presents a potential strategy to alleviate NEC.
  • Growth factors may offer protective effects against NEC-related intestinal damage.

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