Mechanisms and models of Gremlin1 signaling in human disease

It prevents BMPs from interacting with their receptors, crucial for kidney and limb formation. Disruptions in this signaling may cause developmental anomalies like renal agenesis and abnormal digit formation.

GREM1 is also linked to fibrosis in the kidney and lung, chronic pancreatitis, and cancers of the colon, lung, and cervix.<br><br>In studies using GREM1-FITC, GREM1 was found to enter colorectal and cervical cancer cells via clathrin-mediated, caveolin-mediated, and dynamin-mediated endocytosis. It localised to early endosomes post-uptake and was partly re-secreted. The glycosylation of GREM1 isn't necessary for its uptake; however, heparin sulphate proteoglycans (HSPGs) are essential.<br><br>Additionally, GREM1 influences insulin signaling in HeLa cells and activates the Fibroblast growth factor receptor 1 (FGFR1) pathway, enhancing its downstream signaling.