Expression of Thyroid Hormone Receptor Isoforms in Rat Growth Plate Cartilage In Vivo

Expression of Thyroid Hormone Receptor Isoforms in Rat Growth Plate Cartilage In Vivo
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甲状腺激素受体亚型在大鼠生长板软骨中的体内表达

DOI:
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发表时间:
1999
影响因子:
6.2
通讯作者:
Lynn M. Mink
Lynn M. Mink
中科院分区:
医学1区
文献类型:
--
作者:
R. Ballock;Barry C. Mita;Xiaolan Zhou;D. Chen;Lynn M. Mink

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尽管多年来已知甲状腺激素是体内骨骼成熟的有效调节剂,但尚未明确确定这种作用是该激素直接还是间接作用的结果。先前的体内研究表明,甲状腺激素可能通过增加生长激素的分泌来刺激纵向骨生长;然而,单独的生长激素无法刺激软骨成熟。也有迹象表明,甲状腺激素是能够直接作用于生长板软骨细胞通过生长激素的非依赖性机制。在这项研究中,我们证明,大鼠生长板软骨细胞在体内表达的基因编码的甲状腺激素受体的四个亚型中的三个,但相应的蛋白质只能检测到TRα1和TRβ1亚型的受体。正如在其他组织中所注意到的,通过免疫印迹法测量的每种亚型的mRNA水平与相应蛋白质的相对量之间通常相关性较差,这表明受体表达可能受转录后机制调节。
Although thyroid hormone has been known for many years to be a potent regulator of skeletal maturation in vivo, it has not definitively been determined whether this effect is a result of a direct or indirect action of the hormone. Previous in vivo studies have suggested that thyroid hormone may stimulate longitudinal bone growth by increasing the secretion of growth hormone; however, growth hormone alone is unable to stimulate cartilage maturation. There are also indications that thyroid hormone is able to act directly on growth plate chondrocytes through growth hormone–independent mechanisms. In this study, we demonstrate that rat growth plate chondrocytes in vivo express genes encoding three of the four isoforms of the thyroid hormone receptors described to date, but the corresponding protein can only be detected for the TRα1 and TRβ1 isoforms of the receptor. As has been noted in other tissues, there is generally poor correlation between the mRNA levels for each isoform and the relative amount of corresponding protein as measured by immunoblotting, suggesting the possibility that receptor expression may be regulated by post‐transcriptional mechanisms.
三碘甲腺原氨酸在体外刺激猪生长板软骨的成熟。
DOI: 10.1172/jci110641
发表时间: 1982
期刊: The Journal of clinical investigation
影响因子: --
作者:
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DOI: --
发表时间: 1988
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DOI: 10.1210/mend.8.12.7708050
发表时间: 1994-12
影响因子: --
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甲状腺激素受体变体 c-erbA α 2 和甲状腺激素受体 α 1 的独特 C 末端介导不同的 DNA 结合和异二聚化特性。
DOI: 10.1210/mend.6.5.1318505
发表时间: 1992
期刊: Molecular endocrinology (Baltimore, Md.)
影响因子: --
作者:
Katz,D;Berrodin,TJ;Lazar,MA
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