Adenoviral vector expressing IGF-1 protects murine chondrogenic ATDC5 cells against hydrogen peroxide-induced...

Area of Science:

• Cell Biology
• Biochemistry
• Oxidative Stress Research

Background:

• Insulin-like growth factor-1 (IGF-1) plays a crucial role in cell proliferation, survival, and cartilage matrix regulation.
• Age-related decline in IGF-1 levels can impact cellular functions, particularly in cartilage.
• Oxidative stress, induced by agents like hydrogen peroxide (H2O2), is implicated in cellular damage and apoptosis.

Purpose of the Study:

• To investigate the protective effects of IGF-1 against H2O2-induced mitochondrial dysfunction and apoptosis in murine chondrocytic ATDC5 cells.
• To evaluate the efficacy of adenoviral vector-mediated IGF-1 overexpression (IGF-1-Ad) in mitigating oxidative stress damage.
• To explore the potential therapeutic role of IGF-1 in chondrocyte protection.

Main Methods:

• ATDC5 cells were exposed to H2O2 to induce mitochondrial dysfunction and apoptosis.
• An adenovirus expressing IGF-1 (IGF-1-Ad) was constructed and utilized to overexpress IGF-1 in ATDC5 cells.
• Mitochondrial function, cell viability, and apoptosis markers were assessed following H2O2 exposure and IGF-1 overexpression.

Main Results:

• H2O2 treatment significantly promoted mitochondrial dysfunction, reduced cell viability, and induced apoptosis in ATDC5 cells.
• Overexpression of IGF-1 using IGF-1-Ad effectively inhibited H2O2-induced mitochondrial dysfunction.
• IGF-1 overexpression also significantly reduced H2O2-promoted apoptosis in the murine chondrocytic cells.

Conclusions:

• Oxidative stress induces mitochondrial dysfunction and apoptosis in murine chondrocytic ATDC5 cells.
• Adenoviral vector-expressed IGF-1 demonstrates a protective role against oxidative stress-induced cellular damage in chondrocytes.
• Recombinant IGF-1-Ad exhibits promising anti-oxidative stress effects, highlighting its potential therapeutic application in chondrocyte protection.