FOXC2及MUC4促進(jìn)多形性膠質(zhì)母細(xì)胞瘤增殖、遷移與侵襲作用及其分子機(jī)制研究
[Abstract]:Part one: FOXC2 promotes the proliferation, migration and invasion of glioblastoma multiforme and its mechanism.
AIM: To investigate the expression of FOXC2 (forkhead box C2) in GBM (Glioblastoma multiforme glioblastoma) tissues and GBM cell lines, and to construct FOXC2 high expression cell model and FOXC2 gene silencing cell model using GBM cell lines. The regulation mechanism in GBM cells.
METHODS: The expression of FOXC2 in GBM human brain tissue samples was detected by RT-PCR, Western blot and immunohistochemical assay, and compared with human brain tissue samples and six GBM cell lines. 2 cell model, T98G-shFOXC2 cell model with FOXC2 gene silencing and SNB19-FOXC2-siEGFR cell model with EGFR (epidermal growth factor receptor) silencing. MTT and clone formation assay were used to determine the effect of FOXC2 expression on the proliferation of SNB19 and T98G cells and cell injury. The migration and invasiveness of SNB19-FOXC2 cells and T98G-shFOXC2 cells were measured by oral healing test and Boyden cell model. The effect of FOXC2 on EGFR expression in GBM cell lines was determined by RT-PCR, Western blot and immunohistochemistry. The EGFR gene silencing model SNB19-FOXC2-siEGFR1,2 was constructed in SNB19-FOXC2 cells by MTT. The effects of EGFR on FOXC2-induced proliferation, migration and invasion of GBM cells were studied by Boyden cell model and wound healing test.
Results: The expression of FOXC2 in brain samples of 10 GBM patients was significantly higher than that of 10 control patients by RT-PCR and Western blot. The number of FOXC2 positive cells in brain samples of GBM patients was also found by immunohistochemistry. In U87, T98G, SNB19, SW1088, SF767 and SW1783 GBM cell lines, the expression of FOXC2 was the highest in T98G and the lowest in SNB19. According to this result, T98G cells were further used in FOXC2 gene silencing experiment to construct T98G-shFOXC2 cell model, while SNB19 cells were used in FOXC2 gene silencing experiment. The results of MTT and cell cloning showed that the proliferation ability of SNB19-FOXC2 cells was greatly improved, the total number of cloning formation was significantly increased, and the range of cloning formation was wider. Cell wound healing test and Boyden chamber test showed that SNB19-FOXC2 cells significantly accelerated wound healing and had the ability to penetrate Transwell membrane twice as fast as SNB19 cells. On the other hand, after FOXC2 gene was silenced, T98G-shFOXC2 cells showed significant migration and invasion ability. The results of RT-PCR and Western blot showed that FOXC2 gene silencing could significantly reduce the expression of EGFR at RNA transcription and protein levels in T98G cells. EGFR-related genes in B19-FOXC2 cells were used to construct SNB19-FOXC2-siEGFR cell model. MTT, Boyden chamber and wound healing experiments showed that the proliferation, migration and invasion of SNB19-FOXC2-siEGFR cells were significantly lower than those of SNB19-FOXC2 cells. It plays an important regulatory role in the process of proliferation, migration and invasion.
CONCLUSION: (1) FOXC2 is highly expressed in GBM tissues and GBM cell lines. (2) FOXC2 plays an important role in the proliferation, migration and invasion of GBM cells. (3) FOXC2 regulates the expression of EGFR in GBM cells. (4) EGFR is an important regulator of GBM cell proliferation, migration and invasion.
Part 2 MUC4 mucin up-regulates the expression of epidermal growth factor receptor and promotes the proliferation, migration and invasion of glioblastoma multiforme
Objective: To investigate the expression of MUC4 (mucin 4,4 mucin) in GBM tissues and GBM cell lines, and to construct a cell model of MUC4 overexpression and MUC4 gene silencing.
METHODS: The expression of MUC4 in brain tissue samples of GBM patients and six GBM cell lines was determined by RT-PCR, immunohistochemistry and Western blot. According to the expression of MUC4 in six GBM cells, the over-expressed SNB19-MUC4 cells were constructed by gene transfection and RNA interference, and T98G-shM was silenced by MUC4. UC4 cell model and EGFR (epidermal growth factor receptor) silencing SNB19-MUC4-siEGFR cell model. MTT and cell clone formation assays were used to determine the effect of MUC4 on the proliferation of GBM cells. The effect of MUC4 on EGFR expression was determined by RT-PCR, Western blot and immunohistochemical staining. The SNB19-MUC4-siEGFR 1,2,3 cell model with EGFR gene silencing was constructed. The proliferation, migration and invasiveness of GBM cells after EGFR silencing were studied by MTT test, Boyden cell model test and cell healing test.
Results: The expression of MUC4 in 11 brain samples of GBM patients and 11 brain samples of GBM patients was detected by RT-PCR. The expression of MUC4 in 11 brain samples of GBM patients was significantly higher than that in control brain samples, and the number of MUC4 positive cells in brain samples of GBM patients was also significantly higher than that in control brain samples. The expression of MUC4 in six GBM cell lines was measured by RT-PCR and Western blot. The results showed that MUC4 was the highest in T98G cell line and the lowest in SNB19 cell line. T98G cells were used to construct mutant T98G-shMUC4 cell model and SNB19 cells were used to construct MUC4 gene transfection experiment. In cell proliferation experiments, MTT and cell clone formation assays showed that SNB19-MUC4 cells had significantly higher proliferation capacity, more clones and a wider range of clones than the control group. On the other hand, T98G-shMUC cells had significantly lower number of clones than the control group T98G cells. Cell wound healing experiments showed that SNB19-MUC4 cells significantly accelerated wound healing. Boyden's compartment model showed that SNB19-MUC4 cells had three times the ability of control and control cells to penetrate Transwell membranes. The results of RT-PCR and Western blot showed that MUC4 gene silencing could significantly reduce the expression of EGFR at RNA and protein levels in T98G cells. SNB19-MUC4 cells were further treated with RNA interference technique. EGFR-1,2,3 gene was silenced. MTT test, Boyden chamber model test and cell healing test showed that the proliferation, migration and invasion of SNB19-MUC4 cells were significantly decreased compared with those before silencing.
Conclusion: (1) MUC4 is highly expressed in GBM cells and plays an important role in the proliferation, migration and invasion of GBM cells. (2) MUC4 can regulate the expression of EGFR in GBM cells. EGFR plays an important role in the proliferation, migration and invasion of GBM cells.
【學(xué)位授予單位】:大連醫(yī)科大學(xué)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2014
【分類號(hào)】:R739.41
【共引文獻(xiàn)】
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