title: Effects of total energy withdrawal (fasting) on thelevels of growth hormone, thyrotropin, cortisol, adrenaline, noradrenaline, T4, T3, and rT3 in healthy males.
abstract: Ten days of total energy deprivation evoked the following endocrine changes in 12 healthy, normal-weight males: early and marked reductions and increments in the blood levels of T3 and reverse T3, respectively, with rapid returns to pre-starvation levels after refeeding; a slight and late decrease in the blood levels of T4; a minute reduction of the blood levels of TSH; a pronounced increase in the blood levels of growth hormone, but a return towards pre-exposure levels even before discontinuation of starving; a minor and gradual enhancement of the blood levels of cortisol, and an increase in nocturnal urinary adrenaline excretion. It is assumed that these changes reflect a complex regulatory mechanism, the purpose of which is to secure adequate energy supply to vital organs.
mesh_terms: D000328:Adult; D002395:Catecholamines / Q000652:urine*; D004837:Epinephrine / Q000652:urine; D005215:Fasting; D013006:Growth Hormone / Q000097:blood*; D006801:Humans; D006854:Hydrocortisone / Q000097:blood*; D008297:Male; D009638:Norepinephrine / Q000652:urine; D013963:Thyroid Hormones / Q000097:blood*; D013972:Thyrotropin / Q000097:blood*; D013974:Thyroxine / Q000097:blood; D013997:Time Factors; D014284:Triiodothyronine / Q000097:blood
chemical_list: D002395:Catecholamines; D013963:Thyroid Hormones; D014284:Triiodothyronine; D013972:Thyrotropin; D013006:Growth Hormone; D013974:Thyroxine; D006854:Hydrocortisone; D009638:Norepinephrine; D004837:Epinephrine