星形胶质细胞
胶质纤维酸性蛋白
内分泌学
内科学
激素
生物
三碘甲状腺素
海马结构
小脑
甲状腺
神经科学
中枢神经系统
医学
免疫组织化学
作者
Flávia Regina Souza Lima,N Gonçalves,Flávia Carvalho Alcântara Gomes,Marta Sampaio de Freitas,Vivaldo Moura‐Neto
标识
DOI:10.1016/s0736-5748(98)00002-1
摘要
Astrocytes are target to triiodothyronine (T3) hormone action during rat brain development. In this work, we show that astrocytes from distinct developing brain regions are differently responsive to thyroid hormone. Distinctly from embryonic or newborn cerebral hemisphere and mesencephalic astrocytes, newborn cerebellar and embryonic hippocampal astrocytes do not change their morphology in response of hormone treatment. We also analysed protein synthesis and secretion from these T3-treated astrocytes. The results showed a significant increase in protein synthesis in astrocytes from older brain regions. Maximum effect, however, was observed in cerebral hemisphere astrocytes from newborn rats. The protein secretion effect was also more evident in the cerebral hemisphere as well as in cerebellar astrocytes from newborn rats. In addition, we examined T3 effects on GFAP/vimentin expression by culturing 6-day old cerebellar astrocytes. In this case T3 seems to induce GFAP expression which might be occurring as a first step to astrocyte differentiation.
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