Xiaoliang Xu1, Hui Liu2, Ran Wu2, Weiwen Zuo3, Tiantao Wang4, Dong Chen1. 1. Department of Dental, The Second Hospital of Tangshan Tangshan, China. 2. Dental Department, North China University of Science and Technology Affiliated Hospital Tangshan, China. 3. Stormotologry Department, Tangshan Vocational and Technical College Tangshan, China. 4. School of Basic Medicine Science, North China University of Science and Technology Tangshan, China.
Abstract
OBJECTIVE: To investigate the correlation of the expression level of hypoxia-inducible factor-1α (HIF-1α) with the glycosylation of oral squamous cell carcinoma (OSCC). METHODS: We conducted an immunohistochemical SP method to detect the expression levels of HIF-1α and O-glycosylation-related proteins (O-linked N-acetylglucosamine [O-GlcNAc], O-GlcNAcase [OGA], and O-GlcNAc transferase [OGT]) in 30 cases of OSCC tissues that were surgically removed and confirmed by pathology in our hospital from January 2018 to July 2020. Meanwhile, the expression levels of O-GlcNAc, OGA, and OGT under the action of the HIF-1α inhibitor PX-478 were detected by Western blotting in the human OSCC cell line (Tca8113 line). RESULTS: ① The expression of HIF-1α and O-glycosylation-related proteins in OSCC was reported at an increased level. ② The positive expression of HIF-1α was associated with the age and tumor size of OSCC patients (P < 0.05); the positive expression of O-GlcNAc and OGT was related to the tumor size of OSCC patients (P < 0.05). ③ Expression of HIF-1α, O-GlcNAc and OGT in OSCC tissues was positively correlated (φcorrelation coefficient = 0.550). ④ Under HIF-1α inhibition, a statistically significant decrease occurred in the expression levels of O-GlcNAc and OGT at a dose of 25 μM PX-478 (P < 0.05), but a statistically significant increase occurred in OGA (P < 0.05). ⑤ Under the action of PX-478, there was a statistically significant and gradual decrease in the OGT content over time (P < 0.05). CONCLUSIONS: The expression of HIF-1α and O-glycosylation-related proteins increases in OSCC, and the expression level increases proportionally with tumor volume. Expression of HIF-1α and O-GlcNAc and OGT was positively correlated. HIF-1α inhibition by PX-478 led to decreased expression levels of O-GlcNAc and OGT but the increased expression level of OGA. PX-478 can affect Tca8113 glycosylation by reducing the expression level of OGT. AJTR
OBJECTIVE: To investigate the correlation of the expression level of hypoxia-inducible factor-1α (HIF-1α) with the glycosylation of oral squamous cell carcinoma (OSCC). METHODS: We conducted an immunohistochemical SP method to detect the expression levels of HIF-1α and O-glycosylation-related proteins (O-linked N-acetylglucosamine [O-GlcNAc], O-GlcNAcase [OGA], and O-GlcNAc transferase [OGT]) in 30 cases of OSCC tissues that were surgically removed and confirmed by pathology in our hospital from January 2018 to July 2020. Meanwhile, the expression levels of O-GlcNAc, OGA, and OGT under the action of the HIF-1α inhibitor PX-478 were detected by Western blotting in the human OSCC cell line (Tca8113 line). RESULTS: ① The expression of HIF-1α and O-glycosylation-related proteins in OSCC was reported at an increased level. ② The positive expression of HIF-1α was associated with the age and tumor size of OSCC patients (P < 0.05); the positive expression of O-GlcNAc and OGT was related to the tumor size of OSCC patients (P < 0.05). ③ Expression of HIF-1α, O-GlcNAc and OGT in OSCC tissues was positively correlated (φcorrelation coefficient = 0.550). ④ Under HIF-1α inhibition, a statistically significant decrease occurred in the expression levels of O-GlcNAc and OGT at a dose of 25 μM PX-478 (P < 0.05), but a statistically significant increase occurred in OGA (P < 0.05). ⑤ Under the action of PX-478, there was a statistically significant and gradual decrease in the OGT content over time (P < 0.05). CONCLUSIONS: The expression of HIF-1α and O-glycosylation-related proteins increases in OSCC, and the expression level increases proportionally with tumor volume. Expression of HIF-1α and O-GlcNAc and OGT was positively correlated. HIF-1α inhibition by PX-478 led to decreased expression levels of O-GlcNAc and OGT but the increased expression level of OGA. PX-478 can affect Tca8113 glycosylation by reducing the expression level of OGT. AJTR
Authors: Shariq S Ansari; Ashwini K Sharma; Himanshu Soni; Doaa M Ali; Björn Tews; Rainer König; Hansjörg Eibl; Martin R Berger Journal: Cell Death Dis Date: 2018-02-20 Impact factor: 8.469