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The characteristics of lymphocytes in patients positive for anti-MDA5 antibodies in interstitial lung disease

医学 间质性肺病 淋巴细胞 CD8型 骨髓 病理 胃肠病学 外周血淋巴细胞 内科学 免疫学 免疫系统
作者
Wenhan Huang,Feifeng Ren,Lei Luo,Jun Zhou,Dongmei Huang,Zhuma Pan,Lin Tang
出处
期刊:Rheumatology [Oxford University Press]
卷期号:59 (12): 3886-3891 被引量:39
标识
DOI:10.1093/rheumatology/keaa266
摘要

Abstract Objective The aim was to investigate the characteristics of blood lymphocytes in patients positive for anti-melanoma differentiation-associated gene 5 antibodies (anti-MDA5+) in interstitial lung disease. Methods Thirty-eight anti-MDA5+ patients with interstitial lung disease were admitted to our hospital, and the lymphocyte count, lymphocyte subtypes and lung high-resolution CT were recorded. Some of the cases were examined by bone marrow aspiration. Results Compared with the control group, the blood lymphocyte counts of anti-MDA5+ patients before treatment were significantly lower (P < 0.05). After treatment, lung interstitial lesions in some cases were reduced and the lymphocyte counts increased, whereas their CD4:CD8 ratio decreased (P < 0.05). In contrast, lung interstitial lesions of other cases were exacerbated after treatment and the lymphocyte counts decreased, whereas the CD4:CD8 ratio increased (P < 0.05). In cases with exacerbated lung interstitial lesions after treatment, there were fewer CD4 and CD8 T cells than before treatment, and the change in CD8 T cells was significant (P < 0.05). Bone marrow aspiration biopsy indicated that there was no abnormality in the distribution of bone marrow lymphocytes. Conclusion Anti-MDA5+ patients showed a decrease in blood lymphocyte counts. The presence of anti-MDA5+ in patients with pulmonary interstitial lesions was positively correlated with blood lymphocyte counts but negatively correlated with the CD4:CD8 ratio. The CD8 T cells decreased more significantly than CD4 T cells in patients with aggravation of interstitial lung disease. The change in blood lymphocytes in anti-MDA5+ patients might be attributable to transfer of lymphocytes to the lungs to participate in the local immune response.
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