Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, Canada.
Zebrafish. 2011 Jun;8(2):65-71. doi: 10.1089/zeb.2011.0691. Epub 2011 Jun 10.
Wnt signaling is a major player during development and its misregulation often leads to disease, especially cancer. The negative feedback Wnt regulator homologs, Nkd1 and Nkd2, have been shown to inhibit Wnt signaling during development, and current evidence suggests that Nkds degrade Dvl proteins to antagonize Wnt signaling. Here, we demonstrate that during early zebrafish development Nkd1 does not alter either endogenous or exogenous levels of Dvl2. Furthermore, Dvl2 does not affect the levels of Nkd1. Cumulatively, these results demonstrate that Dvl2 is a ubiquitous and stable protein and that Nkds may not always function to degrade Dvl proteins as a method of inhibiting Wnt signaling.
Wnt 信号通路在发育过程中起着重要作用,其调控失常通常会导致疾病,尤其是癌症。负反馈 Wnt 调节同源物 Nkd1 和 Nkd2 已被证明可在发育过程中抑制 Wnt 信号通路,目前的证据表明 Nkds 通过降解 Dvl 蛋白来拮抗 Wnt 信号通路。在这里,我们证明在早期斑马鱼发育过程中,Nkd1 不会改变内源性或外源性 Dvl2 的水平。此外,Dvl2 也不会影响 Nkd1 的水平。综上所述,这些结果表明 Dvl2 是一种普遍存在且稳定的蛋白质,而 Nkds 可能并不总是通过降解 Dvl 蛋白来抑制 Wnt 信号通路。