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- W2403283379 abstract "Background: 5-Azacytidine-induced protein 2 (AZI2) is critical in GM-CSF-induced dendritic cell differentiation.Results: AZI2 deficiency enhances osteoclast survival, leading to decreased bone mass in vivo.Conclusion: AZI2 suppresses osteoclast survival by inhibiting c-Src activation.Significance: This is the first study showing the osteoprotective function of AZI2.5-Azacytidine-induced protein 2 (AZI2) is a TNF receptor (TNFR)-associated factor family member-associated NF-κB activator-binding kinase 1-binding protein that regulates the production of IFNs. A previous in vitro study showed that AZI2 is involved in dendritic cell differentiation. However, the roles of AZI2 in immunity and its pleiotropic functions are unknown in vivo. Here we report that AZI2 knock-out mice exhibit normal dendritic cell differentiation in vivo. However, we found that adult AZI2 knock-out mice have severe osteoporosis due to increased osteoclast longevity. We revealed that the higher longevity of AZI2-deficient osteoclasts is due to an augmented activation of proto-oncogene tyrosine-protein kinase Src (c-Src), which is a critical player in osteoclast survival. We found that AZI2 inhibits c-Src activity by regulating the activation of heat shock protein 90 (Hsp90), a chaperone involved in c-Src dephosphorylation. Furthermore, we demonstrated that AZI2 indirectly inhibits c-Src by interacting with the Hsp90 co-chaperone Cdc37. Strikingly, administration of a c-Src inhibitor markedly prevented bone loss in AZI2 knock-out mice. Together, these findings indicate that AZI2 regulates bone mass by fine-tuning osteoclast survival." @default.
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- W2403283379 date "1978-10-01" @default.
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- W2403283379 title "Prognostic Factors in Aplastic Anaemia" @default.
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- W2403283379 doi "https://doi.org/10.1016/s0308-2261(21)00043-6" @default.
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