首页|RSPO2 as Wnt signaling enabler:Important roles in cancer development and therapeutic opportunities
RSPO2 as Wnt signaling enabler:Important roles in cancer development and therapeutic opportunities
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R-spondins are secretory proteins localized in the endoplasmic reticulum and Golgi bodies and are processed through the secretory pathway.Among the R-spondin family,RSPO2 has emanated as a novel regulator of Wnt signaling,which has now been acknowledged in numerous in vitro and in vivo studies.Cancer is an abnormal growth of cells that proliferates and spreads uncontrollably due to the accumulation of genetic and epigenetic factors that constitutively activate Wnt signaling in various types of cancer.Colorectal cancer(CRC)begins when cells in the colon and rectum follow an indefinite pattern of division due to aberrant Wnt activation as one of the key hallmarks.Decades-long progress in research on R-spondins has demonstrated their oncogenic function in distinct cancer types,particularly CRC.As a critical regulator of the Wnt pathway,it modulates several phenotypes of cells,such as cell prolifer-ation,invasion,migration,and cancer stem cell properties.Recently,RSPO mutations,gene rearrangements,fusions,copy number alterations,and altered gene expression have also been identified in a variety of cancers,including CRC.In this review,we addressed the recent up-dates regarding the recurrently altered R-spondins with special emphasis on the RSPO2 gene and its involvement in potentiating Wnt signaling in CRC.In addition to the compelling physi-ological and biological roles in cellular fate and regulation,we propose that RSPO2 would be valuable as a potential biomarker for prognostic,diagnostic,and therapeutic use in CRC.
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