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Zhang X, Dou P, Akhtar ML, Liu F, Hu X, Yang L, Yang D, Zhang X, Li Y, Qiao S, Li K, Tang R, Zhan C, Ma Y, Cheng Q, Bai Y, Han F, Nie H, Li Y. NEU4 inhibits motility of HCC cells by cleaving sialic acids on CD44. Oncogene 2021; 40:5427-5440. [PMID: 34282273 DOI: 10.1038/s41388-021-01955-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Revised: 06/19/2021] [Accepted: 07/09/2021] [Indexed: 02/07/2023]
Abstract
Hepatocellular carcinoma (HCC) is an extremely metastatic tumor. Sialic acids (SAs) are associated with cancer development and metastasis. NEU4 is a sialidase that removes SAs from glycoconjugates, while the function of the NEU4 in HCC has not been clearly explored. In our research, we found the NEU4 expression was significantly down-regulated in HCC tissues, which was correlated with high grades and poor outcomes of HCC. The NEU4 expression could be regulated by histone acetylation. In the functional analysis of NEU4, the cell motility was inhibited when NEU4 was overexpressed, and restored when NEU4 expression was down-regulated. Similarly, NEU4 over-expressed HCC cells showed less metastasis in athymic nude mice. Further study revealed that NEU4 could inhibit cell migration by enzymatic decomposition of SAs. Our results verified a NEU4 active site (NEU4E235) and overexpressing inactivates NEU4E235A that weakens the inhibition ability to cell migration. Further, 70 kinds of specific interacting proteins of NEU4 including CD44 were identified through mass spectrum. Moreover, the α2,3-linked SAs on CD44 were decreased and the hyaluronic acid (HA) binding ability was increased when NEU4 over-expressed or activated. Additionally, the mutation of CD44 with six N-glycosylation sites showed less sensibility to NEU4 on cell migration compared with wild-type CD44. In summary, our results revealed the mechanism of low expression of NEU4 in HCC and its inhibitory effect on cell migration by removal of SAs on CD44, which may provide new treatment strategies to control the motility and metastasis of HCC.
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Affiliation(s)
- Xiaoqing Zhang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008
| | - Peng Dou
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008
| | - Muhammad Luqman Akhtar
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008
| | - Fei Liu
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008
| | - Xibo Hu
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008
| | - Lijun Yang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008
| | - Depeng Yang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008
| | - Xiaohan Zhang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008
| | - Yiqun Li
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008
| | - Shupei Qiao
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008
| | - Kai Li
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008
| | - Ran Tang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008
| | - Chao Zhan
- The third affiliated hospital, Harbin Medical University, Harbin, Heilongjiang Provence, China, 150006
| | - Yue Ma
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008
| | - Qixiang Cheng
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008
| | - Yan Bai
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008
| | - Fang Han
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008
| | - Huan Nie
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008.
| | - Yu Li
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Provence, China, 150008.
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