Abstract
Procollagen-lysine, 2-oxoglutarate 5-dioxygenase 2 (PLOD2) has been reported as an oncogenic gene, affecting various malignant tumors, including endometrial carcinoma, osteosarcoma, and gastric cancer. These effects are mostly due to the enhanced deposition of collagen precursors. However, more studies need to be conducted on how its lysyl hydroxylase function affects cancers like colorectal carcinoma (CRC). Our present results showed that PLOD2 expression was elevated in CRC, and its higher expression was associated with poorer survival. Overexpression of PLOD2 also facilitated CRC proliferation, invasion, and metastasis in vitro and in vivo. In addition, PLOD2 interacted with USP15 by stabilizing it in the cytoplasm and then activated the phosphorylation of AKT/mTOR, thereby promoting CRC progression. Meanwhile, minoxidil was demonstrated to downregulate the expression of PLOD2 and suppress USP15, and the phosphorylation of AKT/mTOR. Our study reveals that PLOD2 plays an oncogenic role in colorectal carcinoma, upregulating USP15 and subsequently activating the AKT/mTOR pathway.
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