Abstract
The cellular components in bronchoalveolar lavage fluids (BALF) and biopsied lung tissues of patients with various types of interstitial pneumonia were analyzed to clarify cellular kinetics in the lung. The T-cell subsets of lymphocytes in BALF and biopsied lung tissues were examined in 7 cases of hypersensitivity pneumonitis (HP), 2 cases of sarcoidosis (Sar), one case of idiopathic interstitial pneumonia (IIP) and 2 cases of rheumatoid arthritis with interstitial pneumonia (RA+IP). The T-cell subsets in BALF were analyzed by flow cytometry and the T-cell subsets in lung tissue were detected in fresh frozen and thin-sliced specimens using an avidine-biotine complex (ABC) kit. The mean CD4/CD8 ratio in BALF was 0.36 in HP, 3.1 in Sar, 1.07 in IIP and 2.59 in RA+IP, while the mean CD4/CD8 ratio in lung tissues was 0.52 in HP, 2.59 in Sar, 1.11 in IIP and 2.25 in RA+IP, respectively. The ratios of CD4/CD8 in BALF and lung tissues from patients with these various interstitial pneumonia showed a positive correlation. Significant correlation was seen between CD4/CD8 ratios of the alveolar portion and BALF, but there was no correlation observed between granuloma and BALF. These findings indicate that BALF findings reflect the changes in the lung tissues, although BALF might reflect only a part of the changes in the whole lung.
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Schedule a callMore From: Okayama Igakkai Zasshi (Journal of Okayama Medical Association)
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