Serum pneumoproteins in firefighters.

Area of Science:

• Occupational Health
• Pulmonary Medicine
• Biomarkers

Background:

• Firefighters face significant exposure to combustion products.
• Pulmonary health monitoring in firefighters is crucial due to occupational hazards.
• Serum pneumoproteins like CC16 and SP-A may indicate lung injury or inflammation.

Purpose of the Study:

• To investigate the association between serum Clara cell protein (CC16) and surfactant-associated protein A (SP-A) levels and smoke exposure in firefighters.
• To explore potential biomarkers of lung response to fire smoke inhalation.

Main Methods:

• Cross-sectional study involving 402 firefighters.
• Measurement of serum CC16 and SP-A levels.
• Assessment of smoke exposure history, including recent exposure and number of fires fought.

Main Results:

• No overall association between serum pneumoproteins and smoke exposure in the general firefighter population.
• Elevated SP-A levels were observed in symptomatic firefighters exposed to fire smoke within 2 days prior to testing.
• SP-A levels were higher in firefighters with a history of inhalation incidents.
• CC16 showed a negative association with the number of fires fought in the past 12 months among current non-smokers.

Conclusions:

• Recent fire smoke exposure, particularly in symptomatic individuals, is associated with increased SP-A levels.
• CC16 levels may be influenced by cumulative fire exposure in non-smokers.
• Findings underscore the importance of consistent use of self-contained breathing apparatus (SCBA) to mitigate respiratory risks in firefighters.