Serum oxidative stress in patients with pulmonary Mycobacterium avium complex disease

Area of Science:

• Pulmonary Medicine
• Infectious Diseases
• Oxidative Stress Research

Background:

• The mechanism of progressive airway destruction in pulmonary Mycobacterium avium complex (pMAC) disease remains unknown.
• Oxidative stress is implicated in various progressive chronic respiratory diseases.
• A hypothesis suggests oxidative stress contributes to airway destruction in pMAC disease.

Purpose of the Study:

• To investigate the role of oxidative stress in pMAC disease.
• To quantify serum oxidative stress levels in untreated pMAC patients.
• To correlate oxidative stress levels with disease severity.

Main Methods:

• Studied 28 untreated patients with pMAC disease.
• Quantitatively evaluated serum oxidative stress using the diacron reactive oxygen metabolites (d-ROMs) test.
• Categorized patients into mild, moderate, and severe disease groups based on CT imaging.

Main Results:

• All pMAC patients exhibited elevated serum oxidative stress (mean 495.5 ± 102.6 U.Carr).
• Serum oxidative stress levels significantly exceeded the normal range (250-300 U.Carr).
• Patients with severe pMAC disease showed significantly higher oxidative stress compared to those with mild disease (583.4 ± 95.1 vs. 434.6 ± 30.2, p=0.009).

Conclusions:

• Patients with pMAC disease demonstrate elevated serum oxidative stress.
• The degree of oxidative stress elevation correlates with pMAC disease severity.
• Increased oxidative stress may play a role in the progression of pMAC disease.