R-Spondin 1 (RSPO1)

RSPO1 is a member of the R-spondin family and encodes a secreted activator protein with two cystein-rich, furin-like domains and one thrombospondin type 1 domain. In mice, the protein induces the rapid onset of crypt cell proliferation and increases intestinal epithelial healing, providing a protective effect against chemotherapy-induced adverse effects.R-spondin transcripts were observed mainly in central nervous system (CNS) tissues, especially in association with the roof plate structure, in 10- and 12-dpc embryos. Outside the CNS, R-spondin transcripts were detected in forelimb buds after 10 dpc, especially in the body trunk and the proximal posterior part of the anterior limb bud. Expression was also observed in facial parenchyma surrounding the nasal cavity at 12 dpc.