Expression of CNPY2 in mouse tissues: quantification and localization.

Expression of CNPY2 in mouse tissues: quantification and localization.
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DOI:
10.1371/journal.pone.0111370
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Li RK
Li RK
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Hatta K;Guo J;Ludke A;Dhingra S;Singh K;Huang ML;Weisel RD;Li RK

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Canopy FGF 信号调节因子 2 (CNPY2) 是一种 FGF21 调节蛋白,含有 saposin B 型结构域。体外研究表明,CNPY2 能够增强神经元的轴突生长,并稳定巨噬细胞和肝细胞中低密度脂蛋白受体的表达。然而,没有关于 CNPY2 正常表达的体内数据,并且缺乏关于哪些细胞类型在组织中表达这种蛋白质的信息。为了解决这个问题,本研究在 mRNA 和蛋白质水平上检测了 CNPY2 的表达。对小鼠组织的定量PCR和ELISA检查显示,CNPY2在不同器官之间存在差异,其中在心脏、肺和肝脏中表达最高。免疫组织化学在多种细胞类型中检测到 CNPY2,包括骨骼肌细胞、心肌细胞和平滑肌细胞、内皮细胞和上皮细胞。 CNPY2 在小鼠血液以及人和小鼠子宫中也可检测到。这些数据表明 CNPY2 广泛分布于组织中,并表明该蛋白质具有尚未确定的生物学功能。利用这些新的观察结果,我们讨论了该蛋白质的可能功能。
Canopy FGF signaling regulator 2 (CNPY2) is a FGF21-modulated protein containing a saposin B-type domain. In vitro studies have shown CNPY2 is able to enhance neurite outgrowth in neurons and stabilize the expression of low density lipoprotein receptor in macrophages and hepatocytes. However, no in vivo data are available on the normal expression of CNPY2 and information is lacking on which cell types express this protein in tissues. To address this, the present study examined CNPY2 expression at the mRNA and protein levels. Quantitative PCR and ELISA examination of mouse tissues showed that CNPY2 varies between organs, with the highest expression in the heart, lung and liver. Immunohistochemistry detected CNPY2 in a variety of cell types including skeletal, cardiac and smooth muscle myocytes, endothelial cells and epithelial cells. CNPY2 was also detectable in mouse blood and human and mouse uteri. These data demonstrate CNPY2 is widely distributed in tissues and suggest the protein has biological functions that have yet to be identified. Using these new observations we discuss possible functions of the protein.
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