Oleanolic acid attenuates hydrogen peroxide-induced apoptosis of IPEC-J2 cells through suppressing c-Jun and MAPK...

Area of Science:

• Cell Biology
• Molecular Biology
• Pharmacology

Background:

• Oleanolic acid (OA) is a natural triterpenoid with broad therapeutic potential.
• The exact mechanisms by which OA affects stress-induced apoptosis in intestinal epithelial cells are not fully understood.
• Intestinal epithelial cells are vulnerable to oxidative stress, which can lead to apoptosis and disease.

Purpose of the Study:

• To investigate the protective effects of Oleanolic acid (OA) against oxidative stress in intestinal epithelial cells.
• To elucidate the underlying molecular mechanisms of OA's action in an oxidative stress model.
• To determine OA's impact on stress-induced apoptosis and related signaling pathways.

Main Methods:

• An in vitro model of oxidative stress was created using hydrogen peroxide (H₂O₂) in IPEC-J2 intestinal cells.
• Gene expression profiling was performed using RNA sequencing.
• Quantitative real-time polymerase chain reaction (qRT-PCR) and Western blot analysis were used to validate gene and protein expression levels.

Main Results:

• Oleanolic acid (OA) demonstrated a concentration-dependent attenuation of H₂O₂-induced apoptosis in intestinal cells.
• RNA sequencing and pathway analysis indicated that OA mitigates H₂O₂ cytotoxicity by downregulating gene expression via the MAPK signaling pathway.
• Western blot analysis confirmed that OA suppressed the H₂O₂-induced expression of c-Jun protein.

Conclusions:

• Oleanolic acid (OA) pretreatment significantly protects intestinal epithelial cells against H₂O₂-induced apoptosis.
• The protective effect is mediated by the suppression of the c-Jun protein and the MAPK signaling pathway.
• OA shows promise as a therapeutic agent for managing intestinal diseases associated with oxidative stress.