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- W2067475521 abstract "Androgen deprivation, a consequence of hypogonadism, certain cancer treatments, or normal aging in men, leads to loss of muscle mass, increased adiposity, and osteoporosis. In the present study, using a soluble chimeric form of activin receptor type IIB (ActRIIB) we sought to offset the adverse effects of androgen deprivation on muscle, adipose tissue, and bone. Castrated (ORX) or sham-operated (SHAM) mice received either TBS [vehicle-treated (VEH)] or systemic administration of ActRIIB-mFc, a soluble fusion protein comprised of a form of the extracellular domain of ActRIIB fused to a murine IgG2aFc subunit. In vivo body composition imaging demonstrated that ActRIIB-mFc treatment results in increased lean tissue mass of 23% in SHAM mice [19.02 ± 0.42 g (VEH) versus 23.43 ± 0.35 g (ActRIIB-mFc), P < 0.00001] and 26% in ORX mice [15.59 ± 0.26 g (VEH) versus 19.78 ± 0.26 g (ActRIIB-mFc), P < 0.00001]. Treatment also caused a decrease in adiposity of 30% in SHAM mice [5.03 ± 0.48 g (VEH) versus 3.53 ± 0.19 g (ActRIIB-mFc), NS] and 36% in ORX mice [7.12 ± 0.53 g (VEH) versus 4.57 ± 0.28 g (ActRIIB-mFc), P < 0.001]. These changes were also accompanied by altered serum levels of leptin, adiponectin, and insulin, as well as by prevention of steatosis (fatty liver) in ActRIIB-mFc-treated ORX mice. Finally, ActRIIB-mFc prevented loss of bone mass in ORX mice as assessed by whole body dual x-ray absorptiometry and micro-computed tomography of proximal tibias. The data demonstrate that treatment with ActRIIB-mFc restored muscle mass, adiposity, and bone quality to normal levels in a mouse model of androgen deprivation, thereby alleviating multiple adverse consequences of such therapy." @default.
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- W2067475521 date "2010-07-23" @default.
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- W2067475521 title "A Soluble Activin Receptor Type IIB Prevents the Effects of Androgen Deprivation on Body Composition and Bone Health" @default.
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- W2067475521 doi "https://doi.org/10.1210/en.2010-0134" @default.
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