Ku70 modulation alleviates murine allergic asthma features and restores mitochondrial function in lungs

Area of Science:

• Immunology
• Molecular Biology
• Cellular Biology

Background:

• Airway epithelium is constantly exposed to environmental pollutants and allergens.
• Asthma involves airway inflammation, hyperresponsiveness, and mitochondrial dysfunction.
• Reduced Ku70 expression is linked to mitochondrial dysfunction in asthmatic airways.

Purpose of the Study:

• To investigate the role of Ku70 in asthma pathogenesis.
• To determine if Ku70 modulation can ameliorate asthma features and mitochondrial dysfunction.

Main Methods:

• Overexpression of Ku70 in asthmatic mice using Ku70 plasmid.
• Assessment of asthma-related parameters including airway hyperresponsiveness, inflammation, and fibrosis.
• Measurement of oxidative stress markers (8-isoprostane) and mitochondrial function.
• Evaluation of DNA damage using the comet assay.

Main Results:

• Ku70 overexpression attenuated airway hyperresponsiveness, inflammation, and sub-epithelial fibrosis.
• Ku70 administration reduced oxidative stress and restored mitochondrial function in asthmatic mice.
• These effects were observed without impacting DNA damage levels, indicating Ku70's role is independent of DNA repair.

Conclusions:

• Ku70 plays a significant role in mitigating key asthma features.
• Ku70 overexpression restores mitochondrial function and reduces oxidative stress in asthma.
• Ku70 represents a promising therapeutic target for asthma treatment, potentially without interfering with DNA repair mechanisms.