Velde, M. van der

ghrelin effect growth osteoblast hormone study ghsr 1a endocrinol differentiation receptor proliferation unacylated ghrelin expression metab bone mass bone formation peptide treatment secretagogue gastrectomy osteoblastic factor unacylated disease bone metabolism acylated ghrelin formation level acylated bone miner ghsr 1b osteoblast differentiation growth hormone mechanism resorption mineral serum osteoblastic cells action marker hexarelin mouse bone mineral density delhanty velde activity gh secretion mitogen-activated protein kinase secretion ghigo martijn increase osteoporosis des-acyl ghrelin pathway protein metabolism gastroenterol des-acyl vitamin ohlsson cell lines ghrelin levels food intake kinase bone growth ghsr 1a antagonist osteopenia response van der lely fukushima endocrinology deficiency adult kojima stomach growth hormone secretagogues muccioli release bone disease