高压氧联合替莫唑胺对胶质瘤U251细胞的影响

目的研究高压氧(Hyperbaric Oxygen,HBO)联合替莫唑胺(Temozolomide)对人神经胶质瘤U251细胞株的的影响及其机制。方法实验分为4组:A组高压氧联合替莫唑胺组、B组高压氧组、C组替莫唑胺组、D组对照组。通过体外模拟缺氧微环境,用四甲基偶氮唑蓝法(MTT法)、碘化丙啶(PI)染色法、流式细胞仪分别检测细胞生长抑制率、细胞死亡率、细胞凋亡率。Elisa法检测缺氧诱导因子1-α(HIF1-α)和多药耐药相关蛋白-1(MRP-1)的表达情况。结果 1高压氧联合替莫唑胺组在细胞生长抑制率、细胞死亡率和细胞凋亡率上明显高于其他组,数值均有统计学意义(P<0.05)。2高压氧联合替莫唑胺组与高压氧组在HIF1-α和MRP-1上无统计学意义(P>0.05),与其他组有统计学意义(P<0.05)。结论高压氧够增强替莫唑胺化疗效果,高压氧纠正了肿瘤的缺氧环境,下调了HIF1-α和MRP-1的表达,这可能是治疗作用的关键所在。

Influence of hyperbaric oxygen combining Temozolomide on human glioblastoma cell line U251

Objective To discuss the influence and mechanism on hyperbaric oxygen （ HBO ） combining Temozolomide with human glioblastoma cell line U251. Method The cells were divided into fbur groups,A group is HBO combining Temozolomide, B group is HBO, C group is Temozolomide and D group is control group. By simulation of hypoxia microenviroment in vitro, the rate of growth inhibiting is investigated by MTr method. The rate of cell death is observed by PI staining. The rate of apoptosis is analyzed by the flow cytometry. Elasia method is used to detect the expression of hypoxia- inducible factorl-α （HIF1-α） and Multidrug resistance-associated protein-1 （ MRP-1 ）. Results The group of HBO combining Temozolomide is obviously higher than others in rate of growth inhibiting, rate of cell death, rate of apoptosis, the results have statistics differences （P 〈 0.05 ）. The group of HBO comnining Temozolomide has no statistics differences compared with the group of HBO in the expression of HIF1-α and MRP-1 （ P 〉 0.05 ）, but to others it has statistics value （ P 〈 0.05 ）. Conclusion HBO can enhance the chemotherapy effect of temozolomide, it can correct the hypoxic microenvironment and reduce the expression of HIF1-α and MRP-1 ,these may be the key to effect.