Intestinal phenotype in mice overexpressing a heparin-binding EGF-like growth factor transgene in enterocytes.

Intestinal phenotype in mice overexpressing a heparin-binding EGF-like growth factor transgene in enterocytes.
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在肠肠上细胞中过表达肝素结合EGF的生长因子转基因的小鼠中的肠表型。

DOI:
10.3109/08977190903407365
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发表时间:
2010-04
期刊:
Growth factors (Chur, Switzerland)
影响因子:
--
通讯作者:
Besner GE
Besner GE
中科院分区:
其他
文献类型:
--
作者:
Chen CL;Mehta VB;Zhang HY;Wu D;Otabor I;Radulescu A;El-Assal ON;Feng J;Chen Y;Besner GE

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肝素结合EGF样生长因子(HB-EGF)保护动物肠道免受损伤。HB-EGF的未来临床试验可能涉及重复剂量的HB-EGF。由于HB-EGF激活与肿瘤发展有关的EGF受体,我们研究了HB-EGF过表达在肠道中的作用。我们产生转基因(TG)小鼠,其中人HB-EGF基因由绒毛启动子驱动,沿十二指肠至结肠的隐窝绒毛轴沿着过表达HB-EGF。HB-EGF TG小鼠肠上皮细胞增殖增加,肠上皮细胞凋亡增加。尽管HB-EGF长期过度表达,但没有肠增生或肿瘤形成的证据。虽然HB-EGF TG小鼠在基础条件下没有显著的表型改变,但它们对肠损伤的抵抗力增加。在基础条件下,长期的肠HB-EGF过表达不会导致显著的表型改变,但可保护肠免受损伤。
Heparin-binding EGF-like growth factor (HB-EGF) protects the intestine from damage in animals. Future clinical trials of HB-EGF may involve administration of repeated doses of HB-EGF. Since HB-EGF activates EGF receptors which have been implicated in tumor development, we examined the effects of HB-EGF overexpression in the intestine. We generated transgenic (TG) mice in which the human HB-EGF gene is driven by the villin promoter to overexpress HB-EGF along the crypt-villous axis from the duodenum to the colon. HB-EGF TG mice have increased enterocyte proliferation balanced by increased enterocyte apoptosis. Despite prolonged overexpression of HB-EGF, no evidence of intestinal hyperplasia or tumor formation occurs. Although HB-EGF TG mice have no significant phenotypic alterations under basal conditions, they have increased resistance to intestinal injury. Prolonged intestinal HB-EGF overexpression results in no significant phenotypic alterations under basal conditions, but confers protection against intestinal injury.
DOI: 10.1016/0026-2862(91)90086-q
发表时间: 1991-09-01
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