Abstract:The mechanisms governing cell quiescence-proliferation balance are poorly defined. Using a zebrafish model, here we report that Stc1a, a glycoprotein known as a hypocalcemic hormone, not only inhibits epithelial calcium uptake but also functions as a Ca2+-regulated switch controlling epithelial cell quiescence-proliferation balance. Among the 4 stc genes, only the stc1a expression is [Ca2+]-dependent. Genetic deletion of stc1a, but not stc2b, resulted in elevated body Ca2+ contents, ectopic Ca2+ deposit, body … Show more
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