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• W4205383133 endingPage "C394" @default.
• W4205383133 startingPage "C382" @default.
• W4205383133 abstract "Sarcolipin (SLN) is a small regulatory protein that inhibits the sarco(endo)plasmic reticulum Ca2+-ATPase (SERCA) pump. When bound to SERCA, SLN reduces the apparent Ca2+ affinity of SERCA and uncouples SERCA Ca2+ transport from its ATP consumption. As such, SLN plays a direct role in altering skeletal muscle relaxation and energy expenditure. Interestingly, the expression of SLN is dynamic during times of muscle adaptation, in that large increases in SLN content are found in response to development, atrophy, overload, and disease. Several groups have suggested that increases in SLN, especially in dystrophic muscle, are deleterious as it may reduce muscle function and exacerbate already abhorrent intracellular Ca2+ levels. However, there is also significant evidence to show that increased SLN content is a beneficial adaptive mechanism that protects the SERCA pump and activates Ca2+ signaling and adaptive remodeling during times of cell stress. In this review, we first discuss the role for SLN in healthy muscle during both development and overload, where SLN has been shown to activate Ca2+ signaling to promote mitochondrial biogenesis, fiber-type shifts, and muscle hypertrophy. Then, with respect to muscle disease, we summarize the discrepancies in the literature as to whether SLN upregulation is adaptive or maladaptive in nature. This review is the first to offer the concept of SLN hormesis in muscle disease, wherein both too much and too little SLN are detrimental to muscle health. Finally, the underlying mechanisms which activate SLN upregulation are discussed, specifically acknowledging a potential positive feedback loop between SLN and Ca2+ signaling molecules." @default.
• W4205383133 created "2022-01-26" @default.
• W4205383133 creator A5037156246 @default.
• W4205383133 creator A5041040281 @default.
• W4205383133 creator A5073714861 @default.
• W4205383133 creator A5090114298 @default.
• W4205383133 date "2022-03-01" @default.
• W4205383133 modified "2023-09-30" @default.
• W4205383133 title "Role of SERCA and sarcolipin in adaptive muscle remodeling" @default.
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