Activity and function in lung injuries due to sulphur mustard

Area of Science:

• Toxicology
• Pulmonary Medicine
• Biochemistry

Background:

• Sulphur mustard exposure causes significant pulmonary complications in over half of patients.
• The pathogenesis and variable severity of lung injuries from sulphur mustard remain unclear.
• Research has primarily focused on clinical outcomes, often overlooking underlying pathogenetic mechanisms.

Purpose of the Study:

• To evaluate the correlation between superoxide dismutase (SOD) and catalase (CAT) enzyme activity and pulmonary function in individuals exposed to sulphur mustard.
• To explore the role of oxidative stress markers in the development and severity of lung injury post-sulphur mustard exposure.

Main Methods:

• A comparative cross-sectional survey was conducted on 250 sulphur mustard survivors from Sardasht (exposed in 1987) and a control group of non-exposed civilians.
• Pulmonary function tests were performed on all participants.
• Enzyme activity of SOD and CAT was measured in both exposed survivors and the control group.

Main Results:

• Mean SOD activity was significantly higher in the mild exposure group compared to the moderate-to-severe group, and higher in healthy controls than the moderate-to-severe group.
• Mean CAT activity was significantly lower in the healthy control group compared to both the mild and moderate-to-severe exposure groups.
• These findings suggest an altered oxidant-antioxidant balance in individuals with sulphur mustard-induced lung injury.

Conclusions:

• The study hypothesizes that restoring the oxidant-antioxidant balance in favor of antioxidant mechanisms could be a viable therapeutic strategy.
• Re-establishing this balance may help suppress the pathological mechanisms underlying lung injuries caused by sulphur mustard.
• Targeting enzymatic antioxidant pathways offers a potential avenue for mitigating long-term pulmonary damage.