ABSTRACT
Objective To observe the expression levels of fork head box protein N2 (FOXN2) and fork head box protein F2 (FOXF2) in normal brain tissue, low-grade glioma and high-grade glioma, and to explore the relationship between the two and the grade of glioma, and then deduce their roles in the occurrence and development of glioma, to look for possibilities target of drug therapy. Methods From January 2016 to December 2020, 36 glioma specimens were collected from the Department of Pathology, Yijishan Hospital, Wannan Medical College. The expressions of F0XN2 and F0XF2 were detected by immunohistochemistry and immunofluorescence with the double-blind method, and analyzed by SPSS18. 0 software, with a statistical significance of P<0. 05. Then Western blotting and Real-time PCR experiments were carried out on fresh normal brain tissues, low-grade glioma tissues, high-grade glioma tissues during neurosurgery in Yijishan Hospital of Wannan Medical College from January 2020 to January 2021 (normal brain tissues were all trauma patients). Results The results of immunohistochemistry and immunofluorescence showed that the higher grade of glioma, the lower expressions of FOXN2 and FOXF2 would be (P<0. 05). Western blotting showed that the expressions of FOXN2 and FOXF2 in normal brain tissue and low-grade glioma were higher than those in high-grade glioma (P<0. 05). The result of Real-time PCR showed that the expressions of FOXN2 and FOXF2 in normal brain tissue were higher than those in high-grade glioma (P<0. 01). Conclusion FOXN2 and FOXF2 are expressed in normal brain tissues, and their expression is low in glioma in a grade-dependent manner, suggesting that FOXN2 and FOXF2 are related to the grade and poor prognosis of glioma. Enhancing the expression of F0XN2 and F0XF2 ma)' provide a new idea for target therapy of glioma.
ABSTRACT
AIM:To investigate the role of fatty acid translocase(FAT/CD36)on palmitate-induced inflam-mation in human monocyte-derived macrophage THP-1.METHODS:THP-1 cells were treated with palmitate(0,0.1 and 0.2 mmol/L)for 24 h.Transwell chamber assay was used to examine the migration ability of THP-1 cells.The mRNA ex-pression of CD36,tumor necrosis factor-α(TNF-α),interleukin-6(IL-6)and monocyte chemotactic protein 1(MCP-1) was measured by real-time PCR.The protein levels of TNF-αand IL-6 in the supernatant of cultured cells were measured by ELISA.The protein level of CD36 was examined by Western blot.Small interfering RNA(siRNA)targeting CD36 (siCD36)was used to inhibit the expression of CD 36 in the THP-1 cells,and the changes of the cell migration and inflam-matory response were monitored as mentioned above.RESULTS:Palmitate increased the expression of CD36 in the THP-1 cells(P<0.05).Palmitate also up-regulated inflammatory cytokine and chemokine levels,and the differences were sta-tistically significant(P<0.05).Compared with control group,palmitate promoted migration of THP-1 cells.siCD36 was transfected into the THP-1 cells and the silencing efficiency was approximately 54%.The protein levels of TNF-αand IL-6 were also decreased in siCD36 group compared with scrambled RNA(scrRNA)group,and the differences were statisti-cally significant(P<0.05).The migrated cells in siCD36 group were significantly less than those in scrRNA group(P<0.05).CONCLUSION:Palmitate promotes migration ability and triggers inflammatory response in the THP-1 macropha-ges by upregulating CD36 expression.