青蒿琥酯增敏对宫颈癌HeLa细胞裸鼠移植瘤凋亡的影响

目的探讨青蒿琥酯增敏对宫颈癌HeLa细胞裸鼠移植瘤凋亡的影响。方法建立裸鼠移植瘤模型,待移植瘤体积平均增至大约（5 mm×5 mm×5 mm）,将裸鼠随机分为对照组、单药组、单照组和联合组,单药组和联合组每只裸鼠给予青蒿琥酯100 mg.kg^-1.d^-1,对照组和单照组每只裸鼠给予等体积生理盐水,处理7 d,第7 d给药后单照组和联合组立即给予一次性^60Coγ射线10Gy照射,照后观察14 d,14 d后剥瘤,TUNEL法检测移植瘤组织中细胞的凋亡。结果联合组裸鼠移植瘤瘤质量较单照组明显减小[（0.64±0.11）g vs（1.31±0.58）g]（P〈0.05）,抑瘤率达71.17%。联合组移植瘤组织中细胞凋亡数较单照组显著增大[（77.5±8.07）vs（48.80±6.71）]（P〈0.05）。结论青蒿琥酯能明显增加HeLa细胞裸鼠移植瘤对射线的放射敏感性,作用机制与其增强射线诱导移植瘤组织中细胞凋亡有关。     

重复经颅磁刺激对精神分裂症患者阴性症状和认知功能的疗效及安全性研究

目的:探讨重复经颅磁刺激(rTMS)改善精神分裂症患者阴性症状及认知功能的疗效及安全性。方法:入组2018年1月至2019年6月上海市民政第三精神卫生中心就诊的90例病程5年以下精神分裂症患者,给予利培酮药物维持治疗,后随机分为rTMS组(n=47)和伪刺激组(n=43),分别于治疗前、治疗4周末、治疗8周末对研究对象行阳性和阴性综合量表(PANSS)、神经心理状态评定量表(RBANS)测试,比较两组间各变量治疗前后的差异。结果:治疗4周后,rTMS组PANSS量表总分和阴性症状分均低于治疗前,且均低于伪刺激组,差异有统计学意义(P均<0.01)。对分组主效应方差分析发现rTMS组和伪刺激组在PANSS量表阴性分、总分2项和RBANS量表即刻记忆、视空间结构、语言功能、注意力、延迟记忆及RBANS总分6项有统计学差异(P均<0.01)。结论:rTMS治疗对精神分裂症患者阴性症状及认知功能具有改善作用,且疗效有持续效应,安全性好。     

蒿甲醚对人鼻咽癌细胞CNE-1放射敏感性的影响及其机制研究

Objective To evaluate the effect of artemether on the cell cycle and the radiosensitivity in human nasopharyngeal carcinoma cell line CNE-1.Methods Cell growth inhibition was assessed with MTT.The method of colony-forming was used to detect the radiation sensitivity.Cell cycle distribution was analyzed by using flow cytometry.The protein expressions of clyclin B1 and Weei were detected by using Western blot.Results The growth of CNE-1 cells was inhibited in a dose-dependent manner.The concentration of 20 μmol/L artemether had radiosensitive effect on CNE-1 cells at 24 h after administration,and SER was 1.481.When CNE-1 cell was irradiated,the G2/M cells increased (t =4.59,P ＜ 0.05).After exposure to combination of artemether and irradiation,the G2/M cells were decreased (t= 10.60,P ＜ 0.05).Western blot showed that artemether increased the level of cyclin B1 expression and inhibited the level of Weel expression.Conclusions The noncytotoxic concentration of artemether could enhance radiosensitization of CNE-1 cells.The radiosensitivity enhancement of artemether might depend on the exposure time.The effect is most obvious when radiation is delivered 24 h after expose to artemetherr.The radiosensitizing effect could be related to apoptosis.     

青蒿素对人鼻咽癌CNE细胞的放射增敏作用及机制的研究

Objective To investigate the radiosensitizing effects of artemisinin on CNE human nasopharyngeal carcinoma cells in vitro.Methods CNE human nasopharyngeal carcinoma cell line was used in this study.Cell growth kinetics was determined by MTT assay.Effect of the drug on radiosensitivity of CNE cells was analyzed by clonogenic assay.The change of cell cycle was measured by flow cytometry.Results The inhibition of CNE cells growth by artemisinin was increased with concentrations.Artemisinin (1 μmol/L)could enhance the radiosensitizing effects on CNE cell line,and the sensitizing enhancement ratio(SER)was 1.26.Artemisinin abrogated radiation-induced G2/M arrest of the tested CNE cells.Compared with the radiation alone group,the proportion of G2/M phase cells increased in radiation combined with drug group.Conclusions Artemisinin could reduce radiation-induced G2/M arrest and enhance the cytotoxicity of γ-irradiation on the CNE ceils.     

青蒿素对人鼻咽癌CNE细胞的放射增敏作用及机制的研究

Objective To investigate the radiosensitizing effects of artemisinin on CNE human nasopharyngeal carcinoma cells in vitro.Methods CNE human nasopharyngeal carcinoma cell line was used in this study.Cell growth kinetics was determined by MTT assay.Effect of the drug on radiosensitivity of CNE cells was analyzed by clonogenic assay.The change of cell cycle was measured by flow cytometry.Results The inhibition of CNE cells growth by artemisinin was increased with concentrations.Artemisinin (1 μmol/L)could enhance the radiosensitizing effects on CNE cell line,and the sensitizing enhancement ratio(SER)was 1.26.Artemisinin abrogated radiation-induced G2/M arrest of the tested CNE cells.Compared with the radiation alone group,the proportion of G2/M phase cells increased in radiation combined with drug group.Conclusions Artemisinin could reduce radiation-induced G2/M arrest and enhance the cytotoxicity of γ-irradiation on the CNE ceils.     

青蒿琥酯对人宫颈癌HeLa细胞的放射增敏作用

目的 探讨青蒿琥酯对人宫颈癌HeLa细胞的放射增敏作用。方法 应用⁶⁰Co γ射线照射细胞,吸收剂量率为0.635 Gy/min,照射剂量为0、1、2、4和6 Gy。采用MTT法检测青蒿琥酯对HeLa细胞的抑制作用,确定青蒿琥酯的最适实验作用浓度。克隆形成法检测青蒿琥酯对HeLa细胞放射敏感性的影响;采用"多靶单击数学模型"拟合HeLa细胞的剂量-存活曲线,得出平均致死剂量、准阈剂量及放射增敏比,评价其增敏效果。用流式细胞术检测HeLa细胞凋亡率,进一步检测青蒿琥酯对HeLa细胞的放射增敏性。结果 青蒿琥酯对HeLa细胞的抑制作用随药物浓度的增加而增加,单纯照射1、2、4和6 Gy细胞的克隆形成率分别为91.67%、82.02%、58.60%和25.01%,加入青蒿琥酯后,相同照射剂量下克隆形成率分别降低为74.93%、60.53%、22.38%和5.05%;单纯照射组与药物+照射组的平均致死剂量(D₀)分别为2.95和2.07 Gy,准阈剂量(D_q)分别为2.01和1.24 Gy,放射增敏比(SER)为1.43。单纯2和6 Gy照射组细胞凋亡率分别是12.26%和40.08%,加入青蒿琥酯后,相同照射剂量下细胞凋亡率分别上升至22.71%和59.92%。结论 青蒿琥酯对人宫颈癌HeLa细胞的抑制作用成药物浓度依赖性;青蒿琥酯对HeLa细胞具有一定的放射增敏作用。     

青蒿琥酯对子宫颈癌裸鼠移植瘤放射增敏作用的研究

目的 探讨青蒿琥酯对子宫颈癌HeLa细胞裸鼠移植瘤的放射增敏效应及其作用机制.方法 建立子宫颈癌HeLa细胞裸鼠移植瘤模型.待移植瘤平均体积增至5 mmx5 mmx5mm时,采用随机数字表法将裸鼠分为对照组、单纯药物组(青蒿琥酯)、单纯照射组( 10 Gy)及药物+照射组(青蒿琥酯+ 10 Gy).测量移植瘤体积,计算...     

青蒿琥酯对人宫颈癌HeLa细胞的放射增敏作用

Objective To investigate the radiosensitizing effects of artesunate on human HeLa cells of cervical cancer in vitro.Methods Hela cells were irradiated with 60Co γ-rays.The dose rate was 0.635 Gy/min and the radiation dose was 0,1,2,4,6 Gy,respectively.The anti-proliferation activities of artesunate on HeLa cells were evaluated with MTT assay,to determine the most appropriate drug concentration.The effect of radiosensitivity was observed by using clonogenic assay.The single-hit multitarget model was used to plot the HeLa cell's dose-survival curve,to calculate mean lethal dose,quasithreshold dose and sensitization enhancement rate,and to evaluate its radiosensitization effect.The apoptosis was analyzed with flow cytometry (FCM) to further test the radiation senseitization of artesunate on HeLa cells.Results The inhibition of artesunate on HeLa cells increased with concentration.In radiation group,the cell cloning efficiency were 91.67% ,82.02% ,58.60% ,25.01%,respectively,and in artesunate (2.0 μ mol/L) + radiation group,the cell cloning efficiency were 74.93% ,60.53% ,22.38% ,5.05%.In radiation group and artesunate (2.0 μmol/L) + radiation group,the mean lethal dose(D0) was 2.95 and 2.07 Gy,respectively,while the qusai-threshold dose (Dq) were 2.01 and 1.24 Gy,respectively,and SER was 1.43.Compared with 2 and 6 Gy radiation group,the apoptosis rate of drug + radiation group increased from 12.26% ,40.08% to 22.71% ,59.92%.Conclusions The inhibiting effect of artesunate on HeLa cells is concentration-dependent.Artesunate has radiosensitizing effect on HeLa cells in vitro.     

青蒿素联合^60Co γ射线对HeLa和SiHa细胞所致DNA损伤的研究

目的探讨青蒿素联合^60Coγ射线照射后对人宫颈癌HeLa和SiHa细胞的DNA损伤。方法采用甲基四唑蓝（MTT）法检测不同浓度青蒿素对人宫颈癌HeLa和SiHa细胞的抑制效应,确定青蒿素的最适实验浓度;采用单细胞凝胶电泳技术（SCGE）检测照射后HeLa和SiHa细胞DNA的损伤情况。结果青蒿素对HeLa和SiHa细胞的抑制率存在剂量-效应关系;SCGE结果显示：两种细胞的单药组与对照组的彗星细胞检测指标（拖尾率、尾长、OLIVE尾矩和彗尾DNA%）无明显差异（P〉0.05）;在相同照射剂量下,青蒿素加照射组的HeLa细胞的彗星细胞检测指标高于单纯照射组（P〈0.05）,而SiHa细胞差异无统计学意义（P〉0.05）。结论青蒿素本身不能引起He-La和SiHa细胞DNA损伤,但辐照后可致HeLa细胞DNA损伤加重,增加了HeLa细胞的辐射敏感性,而对SiHa细胞没有辐射增敏作用。     

早期子宫颈癌45例临床分析

目的探讨早期子宫颈癌的治疗方法、临床疗效及其影响因素。方法分析手术治疗早期子宫颈癌45例临床资料。按FIGO分期,Ⅰ期22例、Ⅱ期23例。单纯手术12例,以手术为主的综合治疗33例。广泛性全子宫切除＋双附件切除＋盆腔淋巴结清扫37例,广泛性全子宫切除＋单附件切除＋盆腔淋巴结清扫8例。观察肿瘤大小、病理分级、病理类型、临床分期及有无淋巴结转移对术后生存率的影响。结果45例中有43例获随访,其中3例死亡,全组死亡率6．98％。3年生存率92．86％（26／28）,5年生存率83．33％（15／18）。经统计分析,其预后与肿瘤大小、有无淋巴结转移有关（P〈0．05）。结论手术是治疗早期子宫颈癌的首选和有效的手段,早期诊断及早期治疗对改善其预后有帮