Distribution of gamma delta T-cells in the bronchial tree of smokers and non-smokers.

Abstract:

AIMS:To assess the distribution of gamma delta T-cells in the human bronchial tree; and to compare quantitatively the differences between gamma delta T-cell numbers in different parts of the airway wall in smokers and non-smokers. METHODS:Full thickness bronchial wall sections were taken from 10 whole lung specimens from both smokers and non-smokers. Serial cryostat sections stained with the monoclonal antibodies CD3 and TCR delta-1 were examined with the aid of interactive image analysis to assess gamma delta T-cell numbers both in absolute terms and as a proportion of total T lymphocyte numbers. RESULTS:In all cases gamma delta T-cells were demonstrable throughout the airway wall. Although in absolute terms they tend to occur predominantly in the bronchial epithelium, this seems to reflect higher numbers of T lymphocytes in the epithelium in general compared with the submucosa. No genuine epitheliotropism is evident. Comparison by smoking status shows a significant increase in gamma delta T-cell numbers in the bronchial glands of smokers compared with non-smokers. CONCLUSIONS:gamma delta T-cells form an integral though variable component of the immunocompetent cell population of the human airway in both smokers and non-smokers. Although epitheliotropism does not exist in the bronchial tree, gamma delta T-cells seem to form a significant part of the bronchial gland inflammation associated with smoking.

journal_name

J Clin Pathol

authors

Richmond I,Pritchard GE,Ashcroft T,Corris PA,Walters EH

doi

10.1136/jcp.46.10.926

subject

Has Abstract

pub_date

1993-10-01 00:00:00

pages

926-30

issue

10

eissn

0021-9746

issn

1472-4146

journal_volume

46

pub_type

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