Abstract
Critical roles of T cells in idiopathic polymyositis have been suggested, but, those in polymyositis occurring as GVHD after BMT are poorly understood. We thus investigated T cell clonality in a patient with post- transplant polymyositis. As a result, T cell receptor β chains used various BV families in peripheral blood, but only one BV family (BV7) in affected muscle. Importantly, T cells proliferated oligoclonally both in the peripheral blood and the muscle, however, the expanded clonotypes were completely different. Taken together, T cells expanded in the muscle, possibly stimulated by limited kinds of antigens, may drive myositis.
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Acknowledgements
We thank Ms Sayaka Yukii and Ms Yumiko Ajiri for their technical assistant. This work was supported in part by grants from the Ministry of Health and Welfare and the Ministry of Education of Japan.
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Kojima, K., Kurokawa, M., Tanimoto, K. et al. Clonal expansion of limited T cell clonotypes in affected muscle from a patient with post-transplant polymyositis. Bone Marrow Transplant 30, 467–470 (2002). https://doi.org/10.1038/sj.bmt.1703665
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DOI: https://doi.org/10.1038/sj.bmt.1703665
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