Blockade of estrogen-stimulated proliferation by a constitutively-active prolactin receptor having lower expression in invasive ductal carcinoma.
Blockade of estrogen-stimulated proliferation by a constitutively-active prolactin receptor having lower expression in invasive ductal carcinoma.
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通过在浸润性导管癌中表达较低的组成型活性催乳素受体来阻断雌激素刺激的增殖。
DOI:
10.1016/j.canlet.2014.12.031
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发表时间:
2015
期刊:
影响因子:
9.7
通讯作者:
A. Walker
中科院分区:
文献类型:
--
作者:
Kuang;Dunyong Tan;Kuan;A. Walker
A comprehensive understanding of prolactin's (PRL's) role in breast cancer is complicated by disparate roles for alternatively-spliced PRL receptors (PRLR) and crosstalk between PRL and estrogen signaling. Among PRLRs, the short form 1b (SF1b) inhibits PRL-stimulated cell proliferation. In addition to ligand-dependent PRLRs, constitutively-active varieties, missing the S2 region of the extracellular domain (ΔS2), naturally occur. Expression analysis of the ΔS2 version of SF1b (ΔS2SF1b) showed higher expression in histologically-normal contiguous tissue versus invasive ductal carcinoma. To determine the function of ΔS2SF1b, a T47D breast cancer line with inducible expression was produced. Induction of ΔS2SF1b blocked estrogen-stimulated cell proliferation. Unlike intact SF1b, induction of ΔS2SF1b had no effect on PRL-mediated activation of Stat5a. However induction inhibited estrogen's stimulatory effects on serine-118 phosphorylation of estrogen receptor α, serine-473 phosphorylation of Akt, serine-9 phosphorylation of GSK3β, and c-myc expression. In addition, induction of ΔS2SF1b increased expression of the cell cycle-inhibiting protein, p21. Thus, increased expression of ΔS2SF1b, such as we demonstrate occurs with the selective PRLR modulator, S179D PRL, would create a physiological state in which estrogen-stimulated proliferation was inhibited, but differentiative responses to PRL were maintained.
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影响因子:
4.8
作者:
J. Watters;J. S. Campbell;M. Cunningham;E. Krebs;D. Dorsa
通讯作者:
J. Watters;J. S. Campbell;M. Cunningham;E. Krebs;D. Dorsa
DOI:
--
发表时间:
--
期刊:
--
影响因子:
--
作者:
通讯作者:
--
影响因子:
3.5
作者:
Trott, JF;Hovey, RC;Vonderhaar, BK
通讯作者:
Vonderhaar, BK
DOI:
10.1073/pnas.93.12.5947
发表时间:
1996-06-11
影响因子:
11.1
作者:
Chang, WP;Clevenger, CV
通讯作者:
Clevenger, CV
影响因子:
--
作者:
J. L. Brockman;M. Schroeder;L. Schuler
通讯作者:
J. L. Brockman;M. Schroeder;L. Schuler