Abstract
Graft-versus-host disease (GVHD) is among the most challenging complications in unrelated donor hematopoietic cell transplantation (HCT). The highly polymorphic "MHC class I chain-related gene A", MICA, encodes a stress-induced glycoprotein expressed primarily on epithelia. MICA interacts with the invariant activating receptor NKG2D; expressed by cytotoxic lymphocytes. The MICA gene is
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