IMR Press / FBL / Volume 8 / Issue 6 / DOI: 10.2741/1185

Frontiers in Bioscience-Landmark (FBL) is published by IMR Press from Volume 26 Issue 5 (2021). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on imrpress.com as a courtesy and upon agreement with Frontiers in Bioscience.

Open Access Article
Identification, rare-event detection and analysis of dendritic cell subsets in broncho-alveolar lavage fluid and peripheral blood by flow cytometry
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1 University of Pittsburgh Cancer Institute, Department of Surgery, The Hillman Cancer Center, 5117 Centre Avenue, Pittsburgh PA 15213, USA
2 University of Pittsburgh Cancer Institute and Department of Medicine, The Hillman Cancer Center, 5117 Centre Avenue, Pittsburgh PA

Academic Editor: Rakesh Sindhi

Front. Biosci. (Landmark Ed) 2003, 8(6), 1175–1180; https://doi.org/10.2741/1185
Published: 1 September 2003
(This article belongs to the Special Issue Immunemodulation and immunosuppressants)
Abstract

Dendritic cells (DCs) and their precursors play important roles, not only as antigen presenting cells, but components of the immunoregulatory network. Depending on their lineage, activation and differentiation state, DCs can promote a strong T-cell response or a state of anergy, and can polarize the T helper response in the direction of TH1 or TH2. The lung comprises one of the major interfaces between the host and the environment and regularly comes into contact with antigens, allergens and pathogens. Inflammation in response to these stimuli must be very carefully regulated in the lung since perturbations, especially of a chronic nature, can result in immunopathology that interferes with the lungs' critical function of gas exchange. Especially in disease states such as chronic obstructive pulmonary disease, which has been associated with a chronic TH1 response, and asthma, which is TH2-driven, the ability to access and characterize DCs and their precursors is critical to the understanding of immune modulation in these processes. In this report we will demonstrate that mature DCs and their monocytoid and plasmacytoid precursors can be sampled in the lung by the minimal invasive procedure of broncho-alveolar lavage (BAL) despite their relative scarcity and can be detected by rare event multiparameter flow cytometry.

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