A novel transcript for the thyrotropin-releasing hormone receptor in human pituitary and pituitary tumors.
A novel transcript for the thyrotropin-releasing hormone receptor in human pituitary and pituitary tumors.
复制标题
人类垂体和垂体肿瘤中促甲状腺素释放激素受体的新转录本。
DOI:
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发表时间:
1997
影响因子:
5.8
通讯作者:
M. Mori
中科院分区:
文献类型:
--
作者:
M. Yamada;K. Hashimoto;T. Satoh;N. Shibusawa;H. Kohga;Y. Ozawa;S. Yamada;M. Mori
We measured the amounts of TRH receptor (TRHR) messenger ribonucleic acid (mRNA) in human normal pituitary and pituitary tumors and found a novel transcript of the TRHR gene. Competitive PCR revealed expression of the TRHR mRNA in all pituitary adenomas examined, and its level was variable and similar to that in the normal pituitary. When the C-terminal region was amplified by PCR, an additional short product was observed. Cloning and sequence analysis of this short fragment revealed that the deleted sequence corresponded exactly to the 5'-sequence of exon 3, indicating alternative splicing of the TRHR mRNA. This alternative splicing resulted in a frame shift, yielding a C-terminal truncated protein (HTRHR2) on translation. Expression analysis of HTRHR2 in Chinese hamster ovary cells showed no significant binding to [3HIMeTRH or response of intracellular calcium to TRH administration. However, the mRNA ratio of HTRHR2 vs. the wild type (HTRHR1) was significantly different among pituitary tumors. The highest ratio was observed in prolactinomas (30%), and almost no detectable expression was found in GH-producing tumors. These findings indicate that this novel transcript of the human TRH receptor gene is produced in a tumor-specific manner and may be a useful parameter for evaluation of individual pituitary tumors.
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影响因子:
5.8
作者:
HERMAN, V;FAGIN, J;MELMED, S
通讯作者:
MELMED, S
影响因子:
15.9
作者:
ALEXANDER, JM;BILLER, BMK;KLIBANSKI, A
通讯作者:
KLIBANSKI, A
DOI:
10.1210/mend-4-4-551
发表时间:
1990
期刊:
Molecular endocrinology (Baltimore, Md.)
影响因子:
--
作者:
Yamada,M;Radovick,S;Wondisford,FE;Nakayama,Y;Weintraub,BD;Wilber,JF
通讯作者:
Wilber,JF
DOI:
10.1073/pnas.88.24.11354
发表时间:
1991-12-01
影响因子:
11.1
作者:
ALLEN, LF;LEFKOWITZ, RJ;COTECCHIA, S
通讯作者:
COTECCHIA, S
DOI:
--
发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Perlman,JH;Laakkonen,L;Osman,R;Gershengorn,MC
通讯作者:
Gershengorn,MC