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Zhang X, Han J, Feng L, Zhi L, Jiang D, Yu B, Zhang Z, Gao B, Zhang C, Li M, Zhao L, Wang G. DUOX2 promotes the progression of colorectal cancer cells by regulating the AKT pathway and interacting with RPL3. Carcinogenesis 2021; 42:105-117. [PMID: 32531052 PMCID: PMC7877561 DOI: 10.1093/carcin/bgaa056] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 05/28/2020] [Accepted: 06/08/2020] [Indexed: 12/13/2022] Open
Abstract
Dual oxidase 2 (DUOX2) is an important regulatory protein in the organic process of thyroid hormone iodine. Mounting evidence suggests that DUOX2 plays a crucial role in the occurrence and development of cancers. However, the function and mechanism of DUOX2 in colorectal cancer (CRC) have not been fully clarified. In the present study, the relationship between the expression of DUOX2 and the clinicopathological features and prognosis of CRC patients was analyzed. Furthermore, the effects of DUOX2 on proliferation and invasion in vitro and in vivo were examined. DUOX2-associated proteins were identified by immunoprecipitation (IP). Next-generation sequencing detection was performed to illustrate the mechanism of DUOX2 in CRC cells. It was found that the expression levels of DUOX2 in metastatic sites were significantly higher than those in primary tumor tissues, and this was demonstrated to be associated with poor prognosis. The knockdown of DUOX2 inhibited the invasion and migration of CRC cells. Furthermore, DUOX2 regulated the stability of ribosomal protein uL3 (RPL3) by affecting the ubiquitination status of RPL3, and the invasion and migration ability of DUOX2 can be reversed by the overexpression of RPL3. The downregulation of DUOX2 can affect the expression level of a large number of genes, and a number of these are enriched in the PI3K-AKT pathway. Some of the changes caused by DUOX2 can be reversed by RPL3. In summary, DUOX2 exhibits a significantly higher expression in CRC tumor samples, and facilitates the invasion and metastasis ability of CRC cells by interacting with RPL3.
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Affiliation(s)
- Xue Zhang
- Department of Medical Oncology, Hebei Medical University Fourth Affiliated Hospital, Shijiazhuang, Hebei, China
- The Second General Surgery, Hebei Medical University Fourth Affiliated Hospital, Shijiazhuang, Hebei, China
| | - Jing Han
- Department of Medical Oncology, Hebei Medical University Fourth Affiliated Hospital, Shijiazhuang, Hebei, China
- The Second General Surgery, Hebei Medical University Fourth Affiliated Hospital, Shijiazhuang, Hebei, China
| | - Li Feng
- Department of Medical Oncology, Hebei Medical University Fourth Affiliated Hospital, Shijiazhuang, Hebei, China
| | - Lianghui Zhi
- The Second General Surgery, Hebei Medical University Fourth Affiliated Hospital, Shijiazhuang, Hebei, China
| | - Da Jiang
- Department of Medical Oncology, Hebei Medical University Fourth Affiliated Hospital, Shijiazhuang, Hebei, China
| | - Bin Yu
- The Second General Surgery, Hebei Medical University Fourth Affiliated Hospital, Shijiazhuang, Hebei, China
| | - Zhenya Zhang
- The Second General Surgery, Hebei Medical University Fourth Affiliated Hospital, Shijiazhuang, Hebei, China
| | - Bo Gao
- The Second General Surgery, Hebei Medical University Fourth Affiliated Hospital, Shijiazhuang, Hebei, China
| | - Cong Zhang
- Scientific Research Center, Hebei Medical University Fourth Affiliated Hospital, Shijiazhuang, Hebei, China
| | - Meng Li
- The Second General Surgery, Hebei Medical University Fourth Affiliated Hospital, Shijiazhuang, Hebei, China
| | - Lianmei Zhao
- Scientific Research Center, Hebei Medical University Fourth Affiliated Hospital, Shijiazhuang, Hebei, China
| | - Guiying Wang
- The Second General Surgery, Hebei Medical University Fourth Affiliated Hospital, Shijiazhuang, Hebei, China
- Department of General Surgery, Hebei Medical University Third Affiliated Hospital, Shijiazhuang, Hebei, China
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Structures of mouse DUOX1-DUOXA1 provide mechanistic insights into enzyme activation and regulation. Nat Struct Mol Biol 2020; 27:1086-1093. [PMID: 32929281 PMCID: PMC7644671 DOI: 10.1038/s41594-020-0501-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 08/07/2020] [Indexed: 02/07/2023]
Abstract
DUOX1, a NADPH oxidase family member, catalyzes the production of hydrogen peroxide. DUOX1 is expressed in various tissues, including thyroid and respiratory tract, and plays a crucial role in processes such as thyroid hormone biosynthesis and innate host defense. DUOX1 co-assembles with its maturation factor DUOXA1 to form an active enzyme complex. However, the molecular mechanisms for activation and regulation of DUOX1 remain mostly unclear. Here I present cryo-EM structures of the mammalian DUOX1–DUOXA1 complex, in the absence and presence of substrate NADPH, as well as DUOX1–DUOXA1 in an unexpected dimer-of-dimer configuration. These structures reveal atomic details of the DUOX1–DUOXA1 interaction, a lipid-mediated NADPH-binding pocket and the electron transfer path. Furthermore, biochemical and structural analyses indicate that the dimer-of-dimer configuration represents an inactive state of DUOX1–DUOXA1, suggesting an oligomerization-dependent regulatory mechanism. Together, my work provides structural bases for DUOX1–DUOXA1 activation and regulation.
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