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DDR1 promotes LoVo cell proliferation by regulating energy metabolism.

Authors:
Bin Xiong Zehui Xie Feixue Song Huiling Chen Xiaojuan Wang Zhengxu Jin Tiyun Han Yi Li Dekui Zhang

Acta Biochim Biophys Sin (Shanghai) 2022 Mar 25. Epub 2022 Mar 25.

Department of Gastroenterology, The Second Hospital of Lanzhou University, Lanzhou 730030, China.

Cellular energy metabolism dysregulation is associated with colorectal cancer (CRC) development and progression. Discoidin domain receptor1a (DDR1a), one of the five DDR1 isoforms, is closely related to cell proliferation, invasion, and apoptosis in various tumors. Whether it participates in cellular metabolic reprogramming and regulates CRC initiation and progression remains unclear. In this study, we compared the expression of DDR1 in CRC tissues and adjacent tissues from 126 postoperative CRC samples. Moreover, lentivirus-mediated DDR1a overexpression and knockdown were performed in LoVo cells, and cell viability and proliferation were determined by CCK-8 and BrdU assays, respectively. Oxygen consumption rate, extracellular acidification rate, and lactate production were used to determine the effect of DDR1a on metabolic reprogramming. Clinically, CRC patients with high DDR1 expression had poor differentiation and were at an advanced TNM stage. DDR1a promoted LoVo cell proliferation, mitochondrial function, and extracellular acidification. Moreover, DDR1a knockdown inhibited intracellular lactic acid production in LoVo cells, while a pyruvate kinase inhibitor (diamide, significantly reversed this progression. Taken together, our results reveal that DDR1 plays a crucial role in maintaining intracellular environment homeostasis through metabolic reprogramming.

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http://dx.doi.org/10.3724/abbs.2022038DOI Listing
March 2022

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