低氧微环境下脑胶质瘤对替莫唑胺耐药性的机制研究
1.四川省九〇三医院,四川 江油 621700;
2.云南省普洱市人民医院,云南 普洱 665000
收稿日期: 2025-07-24
修回日期: 2025-09-01
录用日期: 2026-04-20
网络出版日期: 2026-04-21
基金资助
昆明理工大学医学联合专项项目(KUST-PE2022011Y);四川省绵阳市卫生健康委基础应用科研课题项目(202210)
Study on the Mechanism of Temozolomide Resistance in Glioma under Hypoxic Microenvironment
1.903 Hospital, Sichuan Jiangyou 621700, China;
2.Pu'er People's Hospital, Yunnan Pu'er 665000, China
Received date: 2025-07-24
Revised date: 2025-09-01
Accepted date: 2026-04-20
Online published: 2026-04-21
目的:研究替莫唑胺对低氧微环境中脑胶质瘤细胞表型的影响,探究在低氧微环境下脑胶质瘤细胞对替莫唑胺的耐药机制。方法:①构建低氧微环境:将T98G细胞分为常氧组(21%氧气浓度)和低氧组(1%氧气浓度)。细胞贴壁后,在两组细胞中添加1 mmol·L-1的替莫唑胺(TMZ),培养72 h。采用CCK-8法检测细胞增殖情况,同时通过细胞划痕实验和Transwell侵袭实验评估细胞的迁移及侵袭能力。利用蛋白质印迹法(Western blot)技术检测两组细胞中低氧诱导因子-1α(HIF-1α)和转化生长因子-β1(TGF-β1)的表达水平。②干扰T98G细胞HIF-1α的表达:在1%低氧微环境中培养细胞,分为干扰组(sh-HIF-1α)和空白对照组(sh-control)。细胞贴壁后,两个组别均添加1 mmol·L-1替莫唑胺,继续培养72 h,分析细胞的增殖、迁移和侵袭能力变化以及TGF-β1的表达水平。结果:①低氧组胶质瘤细胞的增殖、迁移及侵袭水平均高于常氧组(P<0.05)。同时,低氧组胶质瘤细胞中HIF-1α和TGF-β1的表达水平均高于常氧组(P<0.05)。②HIF-1α干扰组T98G细胞的增殖和迁移能力弱于空白对照组(P<0.05),并且HIF-1α干扰组T98G细胞的TGF-β1表达水平亦低于空白对照组(P<0.05)。结论:低氧微环境可减弱替莫唑胺对脑胶质瘤细胞增殖、迁移及侵袭的影响。低氧微环境可能通过上调HIF-1α和TGF-β1的表达,促进胶质瘤细胞的化疗耐药性。在低氧环境下,HIF-1α可能通过调控TGF-β1的表达,参与脑胶质瘤细胞的耐药机制。
赵锦阳
,
许智星
,
陈德
.
低氧微环境下脑胶质瘤对替莫唑胺耐药性的机制研究
Objective: To observe the effect of temozolomide on the phenotype of glioma cells in hypoxic microenvironment and to explore the mechanism of temozolomide resistance of glioma cells in hypoxic microenvironment.Methods: ①To construct a hypoxic microenvironment: The T98G cells were set as the normoxia group (21% oxygen content) and the hypoxia group (1% oxygen content). After the cells adhered, 1 mmol·L-1 temozolomide (TMZ) was added to the two groups of cells. After 72 h of culture, the cell proliferation was detected by CCK-8 assay, and the cell migration and invasion were detected by cell scratch and transwell assay. The expressions of hypoxia-inducible factor-1α (HIF-1α) and transforming growth factor-β1 (TGF-β1) in the two groups were detected by western blot. ② Interfere with the expression of HIF-1α in T98G cells: After the cells of the interference group (sh-HIF-1α) and the blank control group (sh-control) were cultured in 1% hypoxic microenvironment to adhere to the cell wall, 1mmol·L-1 temozolomide was added to the two groups of cells, and continued to culture for 72 h, and the changes of cell proliferation, migration, invasion ability, and the expression level of TGF-β1 were analyzed.Results: ①The proliferation, migration and invasion of glioma cells in the hypoxia group were higher than those in the normoxia group (P<0.05). The expression levels of HIF-1α and TGF-β1 in glioma cells in the hypoxia group were higher than those in the normoxia group (P<0.05). ②The proliferation and migration abilities of T98G cells in the HIF-1αinterference group were lower than those in the blank control group (P<0.05), and the TGF-β1 expression level of T98G cells in the HIF-1αinterference group was also lower than that in the blank control group (P<0.05).Conclusion: Hypoxic microenvironment can attenuate the effects of temozolomide on the proliferation, migration and invasion of glioma cells. Hypoxic microenvironment may promote the chemoresistance of glioma cells by up-regulating the expression of HIF-1α and TGF-β1. HIF-1α may be involved in the drug resistance of glioma cells through mediating TGF-β1 under hypoxic microenvironment.
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