Abstract

Progressive fibrosing interstitial lung diseases (PF-ILDs) have a poor prognosis and may be resistant to corticosteroids and/or immunosuppressants, but antifibrotic therapies such as nintedanib and pirfenidone have been shown to slow the deterioration of lung function. The aim of this study was to identify the characteristic cellular profile of bronchoalveolar lavage fluid at diagnostic bronchoscopy for predicting PF-ILDs, defined as fibrotic diseases on chest high-resolution computed tomography with more than a 5% relative decline in the percent predicted value of forced vital capacity (FVC) over 6 months. The proportions of inflammatory cells, CCR6CXCR3 T helper type 2 (Th2) cells among conventional CD4+ T cells in bronchoalveolar lavage fluid (BALF) and peripheral blood, were measured by flowcytometry. The proportion of lymphocytes in BALF was significantly higher in non-PF-ILD patients than in PF-ILD patients. The proportion of Th2 cells in BALF, but not in peripheral blood, was significantly higher in PF-ILD patients than in non-PF-ILD patients. Multivariate analysis showed that a greater population of Th2 cells in BALF was the only indicator for PF-ILDs. An increased proportion of Th2 cells in BALF is associated with greater deterioration of lung function in fibrotic interstitial lung diseases.

Details

Title
Lung CCR6CXCR3 type 2 helper T cells as an indicator of progressive fibrosing interstitial lung diseases
Author
Tsukuda, Tsukie Kin 1 ; Ohnishi, Hiroshi 1 ; Fujimoto, Minoru 2 ; Nakatani, Yu 1 ; Takamatsu, Kazufumi 1 ; Naka, Tetsuji 2 ; Yokoyama, Akihito 1 

 Kochi University, Department of Respiratory Medicine and Allergology, Kochi Medical School, Nankoku, Japan (GRID:grid.278276.e) (ISNI:0000 0001 0659 9825) 
 Kochi University, Center for the Intractable Immune Disease, Kochi Medical School, Nankoku, Japan (GRID:grid.278276.e) (ISNI:0000 0001 0659 9825); Iwate Medical University, Division of Allergy and Rheumatology, Department of Internal Medicine, School of Medicine, Morioka, Japan (GRID:grid.411790.a) (ISNI:0000 0000 9613 6383) 
Publication year
2022
Publication date
2022
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2736508627
Copyright
© The Author(s) 2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.