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[Cell apoptosis and the associated signal expression in epithelial cells from patients with idiopathic pulmonary fibrosis].

Respiratory Department of Henan Provincial People's Hospital, Zhengzhou 450003, China.
Zhonghua jie he he hu xi za zhi = Zhonghua jiehe he huxi zazhi = Chinese journal of tuberculosis and respiratory diseases 11/2007; 30(10):767-70.
Source: PubMed

ABSTRACT To investigate the changes and significance of cell apoptosis, Fas/FasL and P53 protein in epithelial cells from patients with idiopathic pulmonary fibrosis (IPF).
Cell apoptosis and the expressions of Fas/FasL and P53 protein in lung tissues from 12 patients with IPF (IPF group) and 10 normal controls (control group) were detected by terminal deoxynucleotide transferase-mediated deoxyuridine triphosphate-biotin nick end-labeling (TUNEL) and immunohistochemistry.
Compared with the control group (0/10), the percentage of apoptosis in alveolar epithelial cells and bronchial cells of the IPF group (12/12) was higher. The percentage of Fas, FasL and P53 protein expressions (12/12, 12/12, 11/12) in alveolar epithelial cells of the IPF group were higher than those of the control group (5/10, 2/10, 0/10); and the percentage of Fas, FasL and P53 protein expressions (12/12, 12/12, 11/12) in bronchial cells of the IPF group were also higher than those of the control group (6/10, 3/10, 0/10). There was a significant correlation between the percentage of apoptosis and Fas/FasL and P53 protein expression (r=0.625-0.839, all P<0.01). The correlation of the Fas/FasL and P53 protein expression was also significant (r=0.571-0.760, all P<0.01).
The apoptosis percentage of epithelial cells and the expression of Fas/FasL and P53 protein are up-regulated in lung tissues of IPF, which may play an important role in the development of the disease.

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