Liver metastases are commonly detected in a range of malignancies including colorectal cancer (CRC), unfortunately no effectively strategies for CRC liver metastasis (CRLM). In this study, we found GPR37 expression dramatically increased in human CRLM specimens and associated poor prognosis. GPR37 depletion greatly suppressed the liver metastasis in the mouse models of CRLM. Functional experiments showed that GPR37 knockdown inhibited the growth by reducing the glycolysis of CRC cells. Also, GPR37 knockdown in tumor cells produced decreased levels of two chemokines involved in neutrophil accumulation, which abrogated neutrophil recruitment in the tumor microenvironment of CRLM. Finally, the mechanism studies revealed that GPR37 could activate the hippo pathway, thereby promoting LDHA expression and glycolysis. This leads to increased lactylation of H3K18la, resulting in up-regulation of CXCL1 and CXCL5. These results support a role of the GPR37 in modulating the tumor metabolism and microenvironment in CRLM and GPR37 could be a potential therapeutic target.
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