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ACS Central Science

ACS Central Science

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SOX2-dependent expression of dihydroorotate dehydrogenase regulates oral squamous cell carcinoma cell proliferation

Published:29 January 2021 DOI: 10.1038/s41368-020-00109-x PMID: 33510132
Xuemei Qiu,?Sheng Jiang,?Yanxuan Xiao,?Yumin He,?Tao Ren,?Lu Jiang,?Rui Liu,?Qianming Chen

Abstract

Oral squamous cell carcinoma (OSCC) become a heavy burden of public health, with approximately 300 000 newly diagnosed cases and 145 000 deaths worldwide per year. Nucleotide metabolism fuel DNA replication and RNA synthesis, which is indispensable for cell proliferation. But how tumor cells orchestrate nucleotide metabolic enzymes to support their rapid growth is largely unknown. Here we show that expression of pyrimidine metabolic enzyme dihydroorotate dehydrogenase (DHODH) is upregulated in OSCC tissues, compared to non-cancerous adjacent tissues. Enhanced expression of DHODH is correlated with a shortened patient survival time. Inhibition of DHODH by either shRNA or selective inhibitors impairs proliferation of OSCC cells and growth of tumor xenograft. Further, loss of functional DHODH imped de novo pyrimidine synthesis, and disrupt mitochondrial respiration probably through destabilizing the MICOS complex. Mechanistic study shows that transcriptional factor SOX2 plays an important role in the upregulation of DHODH in OSCC. Our findings add to the knowledge of how cancer cells co-opt nucleotide metabolism to support their rapid growth, and thereby highlight DHODH as a potential prognostic and therapeutic target for OSCC treatment.

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VidofludiMus 717824-30-1 C20H18FNO4 121 suppliers $19.00-$1200.00
VidofludiMus 717824-30-1 C20H18FNO4 121 suppliers $19.00-$1200.00
VidofludiMus 717824-30-1 C20H18FNO4 121 suppliers $19.00-$1200.00
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