Estradiol and testosterone concentrations increase with fasting in weaned pups of the northern elephant seal (Mirounga angustirostris).
作者： RA Sherman-Cooney , RM Ortiz , DP Noren , L Pagarigan , CL Ortiz
DOI: 10.1086/425193
关键词: Luteinizing hormone 、 Food deprivation 、 Mirounga angustirostris 、 Internal medicine 、 Elephant seal 、 Testosterone 、 Radioimmunoassay 、 Endocrinology 、 Serum concentration 、 Biology 、 Immunoenzyme techniques
摘要: ABSTRACT Although neonatal development is generally associated with increased levels of circulating testosterone (T) and estradiol (E2), food deprivation may inhibit steroidogenesis. Therefore, these potentially conflicting stimuli were examined in fasting weaned northern elephant seal (Mirounga angustirostris) pups by measuring serum concentrations T, E2, progesterone (P4), luteinizing hormone (LH) either radioimmunoassay (P4, LH) or enzymeimmunoassay (T, E2). Blood samples obtained from 20 male female at both early (<1 wk postweaning) late (6–8 periods during their natural postweaning fast. T males (early: \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss...
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