Using Bronchoalveolar Lavage to Evaluate Changes in Pulmonary Diseases

  • Marissa E. Di
  • Dandan Yang
  • Y. Peter DiEmail author
Part of the Methods in Molecular Biology book series (MIMB, volume 2102)


Bronchoalveolar lavage (BAL) is a procedure that can be used to collect samples from human and animal lungs to efficiently evaluate the immune response and the potentially pathological changes by examining both the compositions of cells and fluid from lavage. There are observable changes including inflammatory response in human and animal lungs exposed to environmental exposures such as toxic chemicals and microorganisms, or under pathophysiological conditions in respiratory system. The profile of inflammatory cells in BAL provides a qualitative description of inflammatory response, and the secretion in BAL fluid contains secreted proteins of inflammatory mediators and albumin as a quantitative measurement of inflammation and tissue injury in the lungs. Mouse is the most common model system being used for pulmonary disease-related research. A consistent experimental approach on how to lavage mouse lungs and collect samples from mouse lungs is important for a reproducible evaluation of pathological and physiological changes in mouse lung especially for the analysis of inflammation.

Key words

Bronchoalveolar lavage BAL Inflammation Epithelial lining fluid Cytokines Chemokines Microbiome 


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Authors and Affiliations

  1. 1.Department of Environmental and Occupational HealthUniversity of PittsburghPittsburghUSA

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