Abstract：
:The purpose of this study was to investigate the effect of T3 on amino acid accumulation and on the membrane potential of Sertoli cells of immature rat testes. Testes of pre-pubertal and pubertal rats were pre-incubated (30 min) in Krebs-Ringer bicarbonate buffer and incubated in the presence of [14C]methylaminoisobutyric acid with and without T3 for 15, 45 and 60 min. The hormone (10(-6) M and 10(-7) M) significantly stimulated amino acid accumulation in 6 and 13-day old rat testes but did not have any effect in neonatal and pubertal animals. T3 produced a dose-dependent hyperpolarizing effect at concentrations of 10(-6) M, 10(-5) M, 2 x 10(-5) M and 10(-4) M. We conclude that T3 induces a membrane hyperpolarization in Sertoli cells and stimulates amino acid accumulation in immature rat testes, demonstrating that the hormone has a rapid plasma membrane action.
journal_name
Life Scijournal_title
Life sciencesauthors
Silva FR,Leite LD,Barreto KP,D'Agostini C,Zamoner Adoi
10.1016/s0024-3205(01)01186-9subject
Has Abstractpub_date
2001-07-13 00:00:00pages
977-86issue
8eissn
0024-3205issn
1879-0631pii
S0024320501011869journal_volume
69pub_type
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