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A Critical Role of Growth Arrest-Specific Gene 6-Mer Axis in the Pathogenesis of Endothelial Damage Contributing to Thrombotic Microangiopathy Associated with Graft-Versus-Host Disease after Allogeneic Hematopoietic Stem Cell Transplantation
Graft-versus-host disease (GVHD) and thrombotic microangiopathy (TMA) are severe complications of allogeneic hematopoietic stem cell transplantation (allo-SCT). Host endothelial cells are targets of alloreactive donor cytotoxic T lymphocytes or various proinflammatory cytokines following allo-SCT, and endothelial damage plays an important role in the pathogenic mechanism(s) of TMA associated with GVHD. However, the detailed mechanism(s) of TMA as well as GVHD have not yet been fully elucidated. Growth arrest-specific (Gas) 6 structurally belongs to the family of plasma vitamin K-dependent proteins working as a cofactor for...
Source: Blood - November 21, 2018 Category: Hematology Authors: Furukawa, M., Xintao, W., Ohkawara, H., Fukatsu, M., Alkebsi, L., Noji, H., Ogawa, K., Ikezoe, T. Tags: 701. Experimental Transplantation: Basic Biology, Pre-Clinical Models: Poster III Source Type: research

Vitamin A-coupled liposomes containing siRNA against HSP47 ameliorate skin fibrosis in chronic graft-versus-host disease
Chronic graft-versus-host disease (GVHD) after allogeneic hematopoietic stem cell transplantation (SCT) is characterized by multiorgan fibrosis and profoundly affects the quality of life of transplant survivors. Heat shock protein 47 (HSP47), a collagen-specific molecular chaperone, plays a critical role in collagen synthesis in myofibroblasts. We explored the role of HSP47 in the fibrotic process of cutaneous chronic GVHD in mice. Immunohistochemical analysis showed massive fibrosis with elevated amounts of collagen deposits and accumulation of F4/80+ macrophages, as well as myofibroblasts expressing HSP47 and retinol-bin...
Source: Blood - March 29, 2018 Category: Hematology Authors: Yamakawa, T., Ohigashi, H., Hashimoto, D., Hayase, E., Takahashi, S., Miyazaki, M., Minomi, K., Onozawa, M., Niitsu, Y., Teshima, T. Tags: Transplantation Source Type: research