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Progranulin (PGRN) was reported to be a stress-response factor in response to hypoxia and acidosis. Here we present evidences demonstrating that PGRN is also an endoplasmic reticulum (ER) stress responsive factor: PGRN expression was induced and its activation of Erk1/2 and Akt signaling enhanced in response to ER stress; Normal ER stress response was lost in PGRN deficient cells and PGRN deficient...
Bone morphogenetic protein 2 is known to activate unfolded protein response signaling molecules, including XBP1S, BiP and IRE1α. Endoplasmic reticulum stress is induced in chondrogenesis and activates IRE1α signal pathway, which is associated with ER stress-mediated apoptosis. However, the influence on IRE1α and BiP in BMP2-induced chondrocyte differentiation has not yet been elucidated; the molecular...
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