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08:17
Generation of a Chronic Obstructive Pulmonary Disease Model in Mice by Repeated Ozone Exposure
Published on: August 25, 2017
[Superoxide dismutase gene polymorphisms and functional activity in chronic obstructive pulmonary disease]
1Department of Respiratory, the Second Affiliated Hospital of Nanchang University, Nanchang 330006, China.
Summary
Genetic variations in manganese superoxide dismutase (Mn-SOD) are linked to chronic obstructive pulmonary disease (COPD) development. Lower superoxide dismutase (SOD) activity in COPD patients suggests impaired antioxidant defenses.
Area of Science:
- Genetics
- Pulmonology
- Biochemistry
Context:
- Chronic obstructive pulmonary disease (COPD) is a major global health issue.
- Oxidative stress plays a significant role in COPD pathogenesis.
- Superoxide dismutase (SOD) is a key antioxidant enzyme involved in cellular defense against reactive oxygen species.
Purpose:
- To investigate the association between genetic polymorphisms of superoxide dismutase (SOD) and its activity in patients with COPD.
- To determine if specific Mn-SOD (G5774A) and EC-SOD (G -4466 T) gene variants are associated with COPD risk or severity.
- To assess SOD enzyme activity in COPD patients compared to healthy controls.
Summary:
- A study of 114 COPD patients and 80 controls found significant differences in Mn-SOD genotype frequencies.
- The Mn-SOD 5774A allele was more prevalent in COPD patients and associated with increased COPD risk and severity (AA and AG genotypes).
- No significant association was found for EC-SOD gene polymorphisms, but SOD activity was significantly lower in COPD patients, indicating compromised antioxidant capacity.
Impact:
- Identifies Mn-SOD (G5774A) genetic polymorphism as a potential predisposing factor for COPD.
- Highlights the role of impaired oxidant/antioxidant balance in COPD pathophysiology.
- Suggests potential for genetic markers in COPD risk assessment and understanding disease mechanisms.
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