PMID- 33137121 OWN - NLM STAT- MEDLINE DCOM- 20201229 LR - 20201229 IS - 1932-6203 (Electronic) IS - 1932-6203 (Linking) VI - 15 IP - 11 DP - 2020 TI - CXCL9, CXCL10, and CXCL11; biomarkers of pulmonary inflammation associated with autoimmunity in patients with collagen vascular diseases-associated interstitial lung disease and interstitial pneumonia with autoimmune features. PG - e0241719 LID - 10.1371/journal.pone.0241719 [doi] LID - e0241719 AB - INTRODUCTION: Interstitial lung disease (ILD) is a heterogeneous group of diseases characterized by varying degrees of lung inflammation and/or fibrosis. We investigated biomarkers to infer whether patients with collagen vascular diseases associated ILD (CVD-ILD) and interstitial pneumonia with autoimmune features (IPAF) benefit from immunosuppressive therapy. MATERIALS AND METHODS: We retrospectively investigated patients with CVD-ILD, IPAF, and idiopathic pulmonary fibrosis (IPF) between June 2013 and May 2017 at our department. First, we assessed differences in serum and bronchoalveolar lavage fluid (BALF) levels of cytokines between groups. Second, we assessed the associations of patient's clinical variables with serum and BALF levels of those cytokines that were different between groups. Finally, we assessed the associations of diagnosis and response to immunosuppressive therapy with serum levels of those cytokines that were different between groups. RESULTS: We included 102 patients (51 with IPF, 35 with IPAF, and 16 with CVD-ILD). Serum and BALF levels of CXCL9, CXCL10, and CXCL11 were significantly elevated in patients with IPAF or CVD-ILD compared with those in patients with IPF. BALF levels of CXCL9 and CXCL10 were correlated with the percentages of lymphocytes and macrophages in BALF. Serum levels of CXCL9 and CXCL10 were correlated with BALF levels. Serum levels of CXCL9, CXCL10, and CXCL11 were correlated C-reactive protein, percent predicted forced vital capacity, alveolar-arterial oxygen difference, and the percentages of lymphocytes and macrophages in BALF. Serum levels of CXCL9, CXCL10, and CXCL11 showed moderate accuracy to distinguish patients with CVD-ILD from those with IPAF and IPF. Pre-treatment serum levels of CXCL9 and CXCL11 showed strong positive correlations with the annual forced vital capacity changes in patients with IPAF and CVD-ILD treated with immunosuppressive drugs. CONCLUSIONS: Serum CXCL9, CXCL10, and CXCL11 are potential biomarkers for autoimmune inflammation and predictors of the immunosuppressive therapy responses in ILD with background autoimmunity. FAU - Kameda, Masami AU - Kameda M AD - Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan. FAU - Otsuka, Mitsuo AU - Otsuka M AD - Department of Respiratory Medicine, Sapporo-Kosei General Hospital, Sapporo, Hokkaido, Japan. FAU - Chiba, Hirofumi AU - Chiba H AD - Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan. FAU - Kuronuma, Koji AU - Kuronuma K AUID- ORCID: 0000-0002-2743-3266 AD - Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan. FAU - Hasegawa, Takehiro AU - Hasegawa T AUID- ORCID: 0000-0002-4635-4942 AD - Sysmex Corporation, Kobe, Japan. FAU - Takahashi, Hiroki AU - Takahashi H AD - Department of Rheumatology, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan. FAU - Takahashi, Hiroki AU - Takahashi H AD - Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20201102 PL - United States TA - PLoS One JT - PloS one JID - 101285081 RN - 0 (Biomarkers) RN - 0 (Chemokine CXCL10) RN - 0 (Chemokine CXCL11) RN - 0 (Chemokine CXCL9) RN - 9007-34-5 (Collagen) RN - 9007-41-4 (C-Reactive Protein) SB - IM MH - Aged MH - Autoimmunity MH - Biomarkers/analysis/*blood MH - Bronchoalveolar Lavage Fluid/chemistry/cytology/immunology MH - C-Reactive Protein/analysis MH - Chemokine CXCL10/analysis/*blood MH - Chemokine CXCL11/analysis/*blood MH - Chemokine CXCL9/analysis/*blood MH - Collagen/metabolism MH - Female MH - Humans MH - Idiopathic Pulmonary Fibrosis/diagnosis MH - Lung Diseases, Interstitial/*diagnosis/etiology MH - Lymphocytes/cytology/metabolism MH - Macrophages/cytology/metabolism MH - Male MH - Middle Aged MH - Retrospective Studies MH - Vascular Diseases/*complications/pathology MH - Vital Capacity PMC - PMC7605704 COIS- Masami Kameda, Mitsuo Otsuka, and Takehiro Hasegawa have a pending patent application belonging to Sysmex Corporation and Sapporo Medical University. This does not alter our adherence to PLOS ONE policies on materials. EDAT- 2020/11/03 06:00 MHDA- 2020/12/30 06:00 PMCR- 2020/11/02 CRDT- 2020/11/02 17:13 PHST- 2020/07/23 00:00 [received] PHST- 2020/10/20 00:00 [accepted] PHST- 2020/11/02 17:13 [entrez] PHST- 2020/11/03 06:00 [pubmed] PHST- 2020/12/30 06:00 [medline] PHST- 2020/11/02 00:00 [pmc-release] AID - PONE-D-20-22949 [pii] AID - 10.1371/journal.pone.0241719 [doi] PST - epublish SO - PLoS One. 2020 Nov 2;15(11):e0241719. doi: 10.1371/journal.pone.0241719. eCollection 2020.