Molecular cloning, tissue distribution and ontogenetic expression of sodium proton exchanger isoform 2 (NHE-2) mRNA in the small intestine of pigs
文献类型: 外文期刊
第一作者: Feng, D.
作者: Feng, D.;Wang, T.;Feng, D.;Zhi, A.;Zou, S.;Zhou, X.;Zuo, J.;Huang, Z.;Zhi, A.
作者机构:
关键词: ontogenetic expression;sodium proton exchanger (NHE-2);pigs
期刊名称:ANIMAL ( 影响因子:3.24; 五年影响因子:3.223 )
ISSN: 1751-7311
年卷期: 2009 年 3 卷 3 期
页码:
收录情况: SCI
摘要: Molecular cloning, tissue distribution and ontogenetic regulation of sodium/proton exchanger isoform 2 (NHE-2) mRNA expression were evaluated in the pig small intestine during postnatal development The 2872-bp porcine full cDNA sequence of the NHE-2 (EF672046) cloned in this study showed 80% and 70% homology with known human and mouse gene sequence, respectively. Hydrophobic prediction suggests 13 putative membrane-spanning domains within porcine NHE-2. The porcine NHE-2 mRNA was detected in the brain, liver, kidney, heart, lung, small intestine and muscle. The small intestine had the highest NHE-2 mRNA abundance and the brain, lung and liver had the lowest NHE-2 mRNA abundance (P < 0.05). Along the longitudinal axis, the duodenum had the highest NHE-2 mRNA abundance and the ileum and colon had the lowest NHE-2 mRNA abundance (P < 0.05). The NHE-2 mRNA level was increased from day 1 to day 26 in the duodenum (P < 0.05) and dropped dramatically on day 30 (P < 0.05). There is no difference between day 1 and day 7 (P > 0.05). After day 30, the NHE-2 mRNA level remained the same except on day 90 (P > 0.05). The mRNA expression of NHE-2 was not only differentially regulated by age but also differentially distributed along the small intestine of piglets at early stages and growing Stages of life, which may contribute to changes in NHE activity.
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