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Rapid Quantification of Oxidized and Reduced Forms of Glutathione Using Ortho -phthalaldehyde in Cultured Mammalian Cells In Vitro
Published on: June 28, 2024
Glutathione cycle in stable chronic obstructive pulmonary disease
Vanja Radisić Biljak1, Lada Rumora, Ivana Cepelak
1Department for Laboratory Medicine, University Clinic for Diabetes, Endocrinology and Metabolic Diseases Vuk Vrhovac, Zagreb, Croatia. vanja.radisic@gmail.com
Cell Biochemistry and Function
|July 22, 2010
Summary
Glutathione levels in chronic obstructive pulmonary disease (COPD) patients did not differ from controls, but activities of glutathione reductase and peroxidase were altered. Smoking and disease severity impacted glutathione levels and lung function.
Area of Science:
- Biochemistry
- Pulmonology
- Oxidative Stress Research
Background:
- Chronic obstructive pulmonary disease (COPD) involves chronic inflammation and an imbalance between oxidants and antioxidants.
- The glutathione redox cycle is crucial for cellular antioxidant defense, with glutathione being a key thiol.
- Understanding these biochemical pathways is vital for managing COPD progression.
Purpose of the Study:
- To investigate the concentrations of total glutathione and the activities of glutathione peroxidase and glutathione reductase in the peripheral blood of COPD patients.
- To compare these markers between COPD patients and healthy controls, and across different disease severity stages.
- To explore the relationship between glutathione levels, smoking status, and lung function parameters in COPD.
Main Methods:
- Quantification of total glutathione concentration.
- Measurement of catalytic activities of glutathione peroxidase and glutathione reductase.
- Analysis of peripheral blood samples from 109 COPD patients and 51 healthy subjects.
- Statistical comparison of biochemical markers across groups and correlation with clinical parameters.
Main Results:
- Total glutathione concentration was not significantly different in COPD patients compared to healthy controls, but varied between moderate and severe COPD stages.
- Glutathione reductase activity was elevated, while glutathione peroxidase activity was decreased in COPD patients versus controls.
- Lower total glutathione concentrations were observed in current smokers compared to former and never-smokers, with an inverse association between glutathione levels and lung function parameters.
Conclusions:
- Peripheral blood glutathione levels and the activities of key enzymes in the glutathione redox cycle are differentially modulated in stable COPD.
- Glutathione reductase-dependent regulation plays a significant role in maintaining the glutathione redox state for oxidative stress protection in COPD.
- These findings highlight the complex interplay of glutathione metabolism, smoking, and disease severity in COPD pathophysiology.
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