RA联合IFN—γ诱导分化抑制胶质瘤细胞增殖的协同作用

目的 探索用维甲酸（ＲＡ）联合干扰素－γ（ＩＦＮ－γ）协同诱导分化治疗脑胶质瘤的新方案。方法 应用改良ＭＴＴ法,系统分析ＲＡ／ＩＦＮ－γ协同调控脑胶质瘤细胞增殖的量效、时效关系。结果 ＲＡ及ＩＦＮ－γ单独应用时,在药理可达浓度（分别为１０＾－６Ｍ及４０ＩＵ／ｍｌ）水平对体外培养的脑胶质瘤细胞具有一定的抑制增殖效应,但作用较弱;ＲＡ／ＩＦＮ－γ协同诱导分化治疗能有效逆转脑胶质瘤细胞的恶性增殖表型。     

人脑胶质瘤与SV40的关系及其p53、RB蛋白的表达

目的：探讨人脑胶质瘤与猴病毒４０（ＳＶ４０）的关系及其ｐ５３和ＲＢ蛋白的表达。方法：采用核酸原位杂交和免疫组织化学技术对２５６例人脑胶质瘤和１１例正常脑组织进行了ＳＶ４０ ＤＮＡ和抑癌基因产物ｐ５３、ＲＢ蛋白检测。结果：胶质瘤ＳＶ４０阳性１０４例,阳性率４０．６％,正常脑组织均未检测出ＳＶ４０ ＤＮＡ,未发现ＳＶ４０感染与胶质瘤病理分级存在明显相关（Ｐ〉０．０５）;ＳＶ４０阳性胶质瘤ｐ５３、ＲＢ蛋     

伽玛刀治疗脑胶质瘤的临床分析(附142例临床报道)

目的评价伽玛刀对脑胶质瘤的治疗效果。方法自1993年12月至2003年12月经伽玛刀治疗且有完整随访资料的脑胶质瘤病例142例,其中男性88例,女性54例,年龄12～78岁(平均37.5±9.4岁),周边剂量10～22Gy(平均15.3Gy)。结果142例随访3～106个月(平均17.7个月),65例低恶度胶质瘤影像复查结果:消失11例(17%),缩小25%以上27例(42%),无变化15例(23%),恶化12例(18%),有效率为82%。77例高恶度胶质瘤影像复查,近期及远期有效率分别为80%和57%,6、12、24和36个月生存率分别为94.8%,84.4%,50.6%和32.5%。43例(30.3%)患者于治疗后出现放射性水肿。结论伽玛刀治疗脑胶质瘤,可提高患者生存质量,延长生命。对体积较小的低恶度胶质瘤,其疗效明确;对高恶度脑胶质瘤,可控制肿瘤的生长,但易复发。     

CD147、MMP-2在人脑胶质瘤中的表达及其与预后的关系

目的 探讨CD147和基质金属蛋白酶2(matrix metalloproteinases-2,MMP-2)在胶质瘤中的表达,及其与胶质瘤预后的关系.方法 采用免疫组化SP法检测50例胶质瘤标本中CD147和MMP-2蛋白的表达,采用RT-PCR对各级别胶质瘤中CD147的mRNA进行半定量分析,并结合随访资料进行分析.结果 胶质瘤标本中CD147蛋白阳性表达率为72.0%,MMP-2蛋白阳性表达率为78.0%,二者联合表达率70.0%,CD147蛋白的表达与MMP-2蛋白的表达之间存在正相关(r=0.737,P＜0.01),RT-PCR检测到各级别胶质瘤标本中均有CD147 mRNA的表达;且随着胶质瘤级别增高,CD147和MMP-2蛋白的表达强度增高,CD147 mRNA表达水平也增高.预后分析证实CD147的表达越高,患者生存期越短.结论 CD147和MMP-2的表达与胶质瘤的恶性程度及预后关系密切,二者可作为胶质瘤患者判断临床预后和制定诊疗计划有意义的参考指标.     

胶质瘤组织实时定量 PCR 检测中内参基因的选择

目的筛选胶质瘤组织中表达稳定性高的内参基因,为胶质瘤基因表达研究选取合适的内参基因提供实验基础。方法以相对正常脑组织及胶质瘤Ⅰ、Ⅱ、Ⅲ、Ⅳ期组织共25例为实验对象,利用Real-time PCR技术对15个候选内参基因进行筛选,通过geNorm软件对实验结果进行数据分析。结果在15个内参基因中,GUSB、ACTB、TBP、GAPDH、ATP5F1和PPIA 6个基因表达稳定,平均表达稳定度（ M值）均＜0.5,其中ATP5F1和PPIA为表达最稳定的两个内参基因,其M值为0.26。标准化因子V2/3＝0.102,小于取舍值0.15。结论在胶质瘤组织实时定量PCR分析中,ATP5F1和PPIA2个内参基因联合使用,可较好地共同校正基因表达结果。     

脑神经节细胞胶质瘤的影像学表现(附2例报告及文献复习)

目的:探讨脑神经节细胞胶质瘤(GG)的影像学表现及临床病理特点,提高对该病的认识.方法:复习文献并回顾性分析两例经手术病理证实的脑GG的临床、影像学表现及病理特征.结果:两例脑GG临床以头痛为主要症状,1例发生于脑室系统,1例位于枕叶;影像学上形态、密度(信号)、强化方式各异;病理学表现为发育不良的神经元与新生的胶质细...     

Effect of photodynamic therapy and endostatin on human glioma xenografts in nude mice

The aim of this study was to investigate the effect of endostar (a recombinant human endostatin) and photodynamic therapy (PDT) on gliomas. To establish glioma xenografts, human U251 glioma cells were injected into the brain of nude mice. Mice with MRI-confirmed glioma received hematoporphyrin monomethyl ether (HMME)-mediated PDT, daily injection of endostar or their combination, respectively. After treatment, tumor volume, the expression of HIF-1α, VEGF-A and apoptosis marker, and animal survival were examined. PDT and endostar treatment can prolong survival. Changes in induction of apoptosis, tumor growth and survival were more significant in PDT + endostar group. After PDT, HIF-1α and VEGF-A expressions were markedly increased. After endostar treatment, HIF-1α and VEGF-A expressions were significantly reduced. PDT in combination with endostar can significantly inhibit the growth of glioma xenografts. This approach may represent a promising strategy in the treatment of glioma.     

MR灌注成像在鉴别脑胶质瘤放疗后坏死与肿瘤复发中的应用

目的探讨MR灌注成像(PWI)在脑胶质瘤放疗后坏死和肿瘤复发鉴别诊断中的应用。资料与方法对术后行放疗的胶质瘤患者32例(肿瘤复发组18例;放射性坏死组14例),行MRPWI及常规MRI检查。由灌注数据获取脑血容积(CBV)图和脑血流量(CBF)图,计算出病灶及健侧脑皮质最大相对CBV(rCBV)值、最大相对CBF(rCBF)值。结果肿瘤复发组的rCBV值、rCBF值均升高,肿瘤复发的最大rCBV值及最大rCBF值分别为6.23±2.23、5.21±1.55,健侧分别为3.26±1.03(P<0.01)、2.41±1.15(P<0.01);放射性坏死组的rCBV值、rCBF值均降低,最大rCBV值及最大rCBF值分别为1.90±0.53、1.21±0.32,健侧分别为4.26±1.13(P<0.05)、3.36±1.24(P<0.05);两组间最大rCBV值和rCBF值差异均有统计学意义(t检验,P<0.01);非参数相关性分析表明最大rCBV值和最大rCBF值间存在显著的相关性(r=0.795,P<0.05)。结论MRPWI对脑胶质瘤放疗后坏死和肿瘤复发的鉴别有重要意义,最大rCBV值结合最大rCBF值可以更好地鉴别脑胶质瘤放疗后坏死和肿瘤复发。     

神经外科导航辅助下邻近功能区脑胶质瘤的手术治疗

目的 总结神经导航系统在邻近重要功能区手术切除脑胶质瘤的价值.方法 应用德国Brain-LAB公司VV2神经导航系统辅助切除大脑半球邻近脑功能区胶质瘤56例,并对神经外科导航应用于脑胶质瘤切除手术的优越性、精确性和注意事项进行分析和总结.结果 本组病例中,平均注册误差为1.6±0.5mm,术后近期复查CT或MRI证实肿瘤影像学全切率为87.5%,患者临床症状均得已改善,肢体活动等重要神经功能与术前比较均未受明显影响,手术并发症少.短期随访3～13个月期间,5例复发.结论 神经导航系统辅助手术切除邻近重要功能区胶质瘤具有定位准确、精确性好、具有微侵袭等特点,有助于提高脑胶质瘤的全切率及降低手术并发症,相对提高病人生存质量和疗效.     

Effects of irradiation and cisplatin on human glioma spheroids: inhibition of cell proliferation and cell migration

Purpose: Investigation of cell migration and proliferation of human glioma cell line spheroids (CLS) and evaluation of morphology, apoptosis, and immunohistochemical expression of MIB-1, p53, and p21 of organotypic muticellular spheroids (OMS) following cisplatin (CDDP) and irradiation (RT). Material and methods: Spheroids of the GaMg glioma cell line and OMS prepared from biopsy tissue of six glioblastoma patients were used. Radiochemosensitvity (5 μg/ml CDDP followed by RT) was determined using migration and proliferation assays on CLS. In OMS, histology and immunohistochemical studies of MIB-1, p53, and p21 expression were examined 24 and 48 h following treatment. Results: Combination treatment led to a migration inhibition of 38% (CDDP 13%; RT 27%) and specific growth delay of 2.6 (CDDP 1.3; RT 2.1) in CLS. Cell cycle analysis after combination treatment showed an accumulation of cells in the G2/M phase. In OMS, apoptosis increased, cell proliferation decreased, and p53/p21 expression increased more pronounced following CDDP+RT. No morphological damage was observed. Conclusion: CDDP can lead to enhancement of the RT effect in spheroids of both human glioma cell line spheroids and biopsy spheroids from glioblastoma specimens. The exerted effect is additive rather than synergistic.