环氧合酶-2选择性抑制剂对乳腺癌细胞株生长及凋亡的影响

目的观察环氧合酶-2(COX-2)的特异性抑制剂NS-398对乳腺癌MCF-7细胞的生长抑制和凋亡作用，及其对阿霉素(ADM)诱导的MCF-7细胞凋亡作用的影响。方法应用四甲基偶氮唑蓝(MTT)比色法分析NS-398对MCF-7细胞的生长抑制作用，进一步用NS-398和ADM单独及联合作用于MCF-7细胞，流式细胞术检测细胞的凋亡，免疫印迹法检测凋亡相关蛋白Bcl-2、Pax的表达。结果40μg／ml的NS-398就可抑制MCF-7细胞生长、诱导其凋亡，下调Bcl-2蛋白表达；和ADM联用凋亡率显著增高。结论NS-398可抑制MCF-7细胞生长、诱导其凋亡，并且和阿霉素有协同作用，其诱导凋亡与Bcl-2表达下调有关。     

他莫昔芬与辛伐他汀对人乳腺癌细胞MCF-7的协同效应及机制

目的 探究他莫昔芬(TAM) 与辛伐他汀(SIV) 对人乳腺癌细胞株(MCF-7)的增殖抑制作用及其潜在的作用机制.方法 MTT检测TAM、SIV单独以及联合使用对MCF-7细胞株的增殖抑制作用,计算TAM与SIV单独作用时IC50值以及联合使用时对细胞作用的联合指数(CI),评价两药之间的相互作用.荧光显微镜下观察并拍摄各组中的细胞凋亡形态学变化.流式细胞术检测TAM组、SIV组、TAM+SIV组药物处理后的MCF-7细胞凋亡情况.Western blot法检测各组细胞Bcl-2、Bax的表达情况.结果 MTT法表明,TAM与SIV单药对MCF-7有增殖抑制作用,联合作用时抑制更为明显,且呈协同作用;荧光显微镜及流式细胞术显示TAM与SIV单药对MCF-7有诱导凋亡作用,联合时作用增强;Western blot 法表明TAM+SIV组中Bcl-2表达量较细胞对照组及TAM组、SIV组下降而Bax 表达量增加且更加明显.结论 TAM与SIV联合使用时可显著抑制MCF-7细胞株的增殖,同时可明显诱导MCF-7细胞株凋亡,提示两药联合使用时,乳腺癌患者可能有更好的获益.     

藻红蛋白诱导乳腺癌MCF-7细胞凋亡与细胞周期的关系

目的 研究藻红蛋白 (PE) 对人乳腺癌 MCF-7 细胞的增殖抑制效果和诱导凋亡作用。方法 采用 MTT 法和 SRB 法检测 PE 对人乳腺癌 MCF-7 细胞增殖的抑制作用。采用倒置显微镜、荧光显微镜 Hoechst 33258 染色观察 MCF-7 细胞凋亡细胞形态。Annexin V-FITC/PI 双荧光染色观察细胞凋亡过程中特异的磷脂酰丝氨酸 (PS) 外翻情况确定凋亡的出现。流式细胞仪观察 PE 对 MCF-7 细胞周期的影响。结果 PE 对 MCF-7 细胞有较强的生长抑制作用,并且呈一定的剂量依赖性,其 72 h 的 IC₅₀ 值为 147.82 μg/mL,GI₅₀ 值为 109.76 μg/mL。倒置显微镜下与基本贴壁的饱满、边沿清晰的对照组细胞比较,给药组细胞有明显的细胞变粗糙,贴壁细胞减少的现象,而且浓度越高,作用时间越长,悬浮细胞越多。荧光显微镜下可见各给药组 MCF-7 细胞出现不同程度深染亮点的细胞核质,染色质浓集固缩并伴有凋亡小体形成。激光共聚焦显微镜下可见给药组细胞膜被染成绿色,细胞核被染成红色。流式细胞仪显示 PE 可阻滞 MCF-7 细胞从 S 期进入 G₂/M 期,促使细胞凋亡。结论 PE 对 MCF-7 细胞有较强的抑制作用,可使其凋亡,其作用机制与周期阻滞有关。     

维生素C与顺铂联合用药对人乳腺癌细胞MCF-7的杀伤作用及机制研究

目的探讨维生素C与顺铂联合用药对人乳腺癌细胞MCF-7的杀伤作用及机制。方法将不同浓度的维生素C和顺铂单独用药或联合加入对数生长期的人乳腺癌细胞MCF-7,以不加药同期培养的细胞作为对照组。采用四氮唑盐比色法检测细胞增殖抑制率,流式细胞仪检测细胞凋亡,蛋白质印迹法检测细胞凋亡相关蛋白[胱天蛋白酶3(caspase-3)和B细胞淋巴瘤/白血病-2(Bcl-2)]的表达。结果随着顺铂和维生素C(> 1 mmol/L)药物浓度升高,其对MCF-7细胞增殖的抑制率逐渐增大。1 mmol/L的维生素C与1. 25～10μg/m L的顺铂有协同效应。所有单独用药或联合用药组内高剂量用药后MCF-7细胞的凋亡率均明显高于对应低剂量用药,且维生素C和顺铂联合用药的MCF-7细胞凋亡率明显高于维生素C或顺铂单独用药。5μg/m L顺铂单独用药或与0. 5 mmol/L、1 mmol/L、2 mmol/L维生素C联合用药后MCF-7细胞的促凋亡蛋白caspase-3表达增加,而凋亡抑制蛋白Bcl-2的表达减少。结论维生素C和(或)顺铂可抑制MCF-7细胞增殖并促进其凋亡,且联合用药效果优于单独用药。维生素C对顺铂抑制MCF-7细胞增殖有增敏作用,顺铂和维生素C单独用药或联合诱导MCF-7细胞凋亡的机制可能通过促进caspase-3和抑制Bcl-2表达实现。     

三羟异黄酮联合阿霉素对人乳腺癌细胞HER-2/neu表达的影响

目的:探讨三羟异黄酮(GEN)联合阿霉素(ADM)对人乳腺癌耐药细胞MCF-7/ADM中HER-2/neu mR-NA及蛋白表达的影响。方法:将不同浓度GEN和ADM单独或联合作用于体外培养的MCF-7/ADM细胞后,RT-PCR检测HER-2/neu mRNA表达情况,Western blot检测HER-2/neu蛋白表达情况。结果:体外培养的MCF-7/ADM细胞高表达HER-2/neu mRNA及蛋白,经GEN单独及联合ADM作用后,HER-2/neu mRNA和蛋白表达明显下调。联合用药比相同浓度GEN单用下调更明显。结论:人乳腺癌MCF-7/ADM细胞耐药性与HER-2/neu mRNA及蛋白高表达相关,GEN能部分逆转MCF-7/ADM细胞多药耐药性。     

三氧化二砷与粉防己碱联合作用对MCF-7细胞的影响

目的 观察三氧化二砷与粉防已碱联合作用对人乳腺癌细胞系MCF-7的影响.方法 MTT法检测三氧化二砷与粉防己碱联合作用对MCF-7细胞增殖的影响;流式细胞术检测三氧化二砷与粉防己碱联合作用对MCF-7细胞凋亡的影响;扫描电镜观察三氧化二砷与粉防己碱联合作用对MCF-7细胞形态的影响.结果 MTT比色实验显示两药联用产生的抑制率高于单药使用,联合用药时随着两药比例不同,效果有差异,在一定用药比例时产生协同作用;选取MTT比色实验中产生协同作用的药物浓度进行细胞凋亡实验,联合用药组的凋亡率高于单独用药组,且根据计算联合用药指数得出有协同作用;细胞形态学观察,联合用药组细胞表面微绒毛和伪足消失,细胞较小,表面出现塌陷.结论 粉防己碱和三氧化二砷单独和联合用药作用于MCF-7细胞均可抑制细胞生长,阻止细胞周期,诱导细胞凋亡.联合用药作用强于单独用药.在一定浓度范围产生协同作用.     

脂氧合酶抑制剂NDGA对乳腺癌细胞 MCF-7生物学特性的影响

目的：探讨去甲二氢愈创木酸（nordihydroguaiaretic acid，NDGA）对乳腺癌细胞MCF-7增殖和凋亡的生物学特性的影响。方法：MTT法绘制细胞生长曲线及检测细胞存活率、倒置相差显微镜和扫描电镜观察细胞凋亡、流式细胞仪检测细胞周期和凋亡率。结果：NDGA对乳腺癌细胞MCF-7生长增殖的抑制作用呈剂量和时间依赖效应，阻滞细胞周期于S期，诱导细胞凋亡形成，使细胞表面超微结构发生改变。结论：NDGA能够抑制乳腺癌MCF-7细胞增殖，诱导细胞凋亡。     

反义寡核苷酸抑制survivin表达来增强乳腺癌细胞株MCF-7和MDA-MB-231对多西他赛敏感性的研究

目的: 探讨利用反义寡核甘酸(ASODN)技术封闭乳腺癌细胞株survivin基因,观察survivin基因表达下调能否诱导细胞凋亡及增强对多西他赛(docetaxel)药物敏感性.方法: Survivin ASODN单独及联合多西他赛处理乳腺癌细胞株MCF-7和MDA-MB-231,RT-PCR检测survivin mRNA的表达,免疫细胞化学方法和Western blotting检测survivin蛋白表达,倒置显微镜观察细胞形态变化,MTT法检测细胞的生长抑制率.结果: Survivin ASODN可下调人乳腺癌细胞株中survivin mRNA 和蛋白质的表达;survivin ASODN 与多西他赛联合用药组相比对照组和多西他赛组可明显抑制细胞株的生长(P<0.01).结论: Survivin ASODN明显抑制survivin基因在乳腺癌细胞株MCF-7和MDA-MB-231中的转录及翻译,明显提高乳腺癌对多西他赛的敏感性.     

姜黄素联合干扰素-β/维甲酸对乳腺癌细胞的协同效应

目的 研究姜黄素和干扰素-β/维甲酸(IFN-β/RA)联合用药对人乳腺癌细胞MCF-7的生长抑制效应,探讨姜黄素和IFN-β/RA联合用药的合理性及科学性.方法 实验分组如下:对照组(加培养基)、姜黄素组(40 μmol/L)、 IFN-β/RA组(IFN-β 750 U/ml,RA 1.5 μmol/L)、姜黄素联合 IFN-β/RA 组(姜黄素 40 μmol/L, IFN-β 375 U/ml, RA 0. 75 μmol/L),分别处理乳腺癌细胞MCF-7,采用MTT法检测细胞活性,采用Annexin-V/PI双染流式细胞术检测细胞凋亡情况.结果 姜黄素和IFN-p/RA联合用药可显著抑制乳腺癌MCF-7细胞增殖,同时诱导细胞凋亡,这种作用强于单药(P<0. 05),表现为协同作用.结论 姜黄素联合 IFN-β/RA对乳腺癌MCF-7细胞增殖具有更强的抑制作用,并能促进细胞凋亡,具有协同作用.     

Evn-50对人乳腺癌MCF-7耐三苯氧胺细胞株生长和凋亡的影响

目的:通过研究黄荆子的乙酸乙酯提取物Evn-50在体外对人乳腺癌MCF-7和耐三苯氧胺细胞株(MCF-7/TAM-R)的生长和凋亡的影响,探索Evn-50在逆转乳腺癌耐药中的作用及其可能机制。方法:构建MCF-7/TAM-R细胞系,分别用DMSO、5μmol/L TAM、5μmol/L TAM+50μg/ml Evn-50和50μg/ml Evn-50处理细胞。然后,采用MTT法测定细胞存活率,PI单染流式细胞术检测细胞凋亡率及细胞周期分布情况,免疫蛋白印记法观察Evn-50和TAM单独或联合作用时的机制。结果:Evn-50单药或与TAM联合均可以降低人乳腺癌MCF-7和三苯氧胺耐药细胞株MCF-7/TAM-R的存活率,两药联合作用更为明显,同单用TAM组相比差异有统计学意义(P<0.01)。Evn-50单药或与TAM联合应用对两株细胞的凋亡均有明显影响,且随着作用时间的延长细胞凋亡逐渐增多,其中以72 h时细胞凋亡率和G2期细胞比例最为明显(P<0.01)。TAM和Evn-50联合处理无论是对MCF-7细胞还是对三苯氧胺耐药细胞MCF-7/TAM-R,均能明显下调p-AKT(Ser473)和p-MAPK44/42(Thr202/Tyr204)蛋白水平。结论:Evn-50能够抑制MCF-7和MCF-7/TAM-R细胞株的生长并诱导细胞凋亡,尤其在Evn-50与TAM联合处理时更为明显。其作用机制可能与AKT和MAPK信号通路的下调相关,但需要进一步研究证实。     

APPLICATION OF LORNOXICAM TO PATIENT-CONTROLLED ANALGESIA IN PATIENTS UNDERGOING ABDOMINAL SURGERIES

FOR anesthesiologis s ,treatingpostoperativepainhas alwaysbeen a problem.Althoughopioidshave been provedtobe effective,theirsideeffectscouldnotbeignored.With thedevelopmentofscienceand pharmacology,many drugs with aspectsof satisfactoryanalgesicefficacyand couldbe welltoleratedby patientshave been developed.And lornoxicamisone of them, which isa non-steroidalanti-inflammatorydrug (NSAID ), with analgesic, anti-infl-ammatory,andantipyreticproperties.Itseliminationhalf-time(3 to 5 hours) isle…     

Dr.Zhang Ren''''s Experience in the Acupuncture Treatment of Different Diseases with the Same Therapeutic Principle

Dr.Zhang Ren,the chief physician,is the chairman of Shanghai Acupuncture and Moxibustion Association.Having been engaged in medicine for about 40 years,he is experienced in treating various intractable diseases.In his long years of clinical practice,he advocates taking the TCM differentiation as the basis to seek for the acupuncture method for treatment of modern intractable diseases.The author of this essay had the fortune to follow Dr.Zhang in study.The following is a summary of Dr.Zhang's experience in the acupuncture treatment for different intractable diseases with the same therapeutic principle.     

Luo Lingjie''''s Experience in Treating Chronic Nephropathy

In treating chronic nephropathy,Luo Lingjie,a chief physician,pays attention to regulating the balance between yin and yang,treating infection if present,and removing pathogenic factors.He prescribes gentle drugs and uses carefully strongly warming-tonifying ones,emphasizes the importance of persuading the patient to persist in treatment with medication and nurse one's health for recuperation,and is good at combined use of TCM and western medicine therapy and brings the merits of various therapies into full play,with obvious theraoeutic effects.     

Acupuncture Combined with Spinal Tui Na for Treatment of Primary Dysmenorrhea in 30 Cases

Objective: To observe the therapeutic effects in acupunture treatment of primary dysmenorrhea combined with spinal Tui Na, and study its mechanism. Methods: Thirty cases of the treatment group were treated by acupuncture combined with spinal Tui Na, and thirty cases in the control group were treated by routine acupuncture. Results: The total effective rate was 93.3% in the treatment group, and 73.3% in the control group, with a significant difference between the two groups (P<0.05). Conclusions: Acupuncture combined with spinal Tui Na has good prospects for treatment of primary dysmenorrhea.     

猪肺磷脂注射液联合经鼻持续气道正压通气对呼吸衰竭早产儿的临床疗效及肌酸激酶同工酶活性的影响

目的 探讨猪肺磷脂注射液联合经鼻持续气道正压通气(NCPAP)对呼吸衰竭早产儿的临床疗效及肌酸激酶同工酶活性(CK-MB)的影响.方法 选取呼吸衰竭早产儿80例,分为观察组和对照组各40例.对照组采用NCPAP给氧治疗,观察组给予NCPAP给氧联合猪肺磷脂气管内给药.观察两组患儿治疗前及治疗12h、24 h后PaO2、PaCO2、血氧饱和度(SaO2)、pH的变化情况,检测治疗前及治疗5d后血清CK-MB水平;评估两组患儿的临床治疗效果.结果 两组患儿PaO2、PaCO2、SaO2、pH比较,差异均有统计学意义(P＜0.05),其中观察组治疗后的PaO2、SaO2、pH均高于对照组,PaCO2则低于对照组.两组的PaO2、SaO2、pH均随观察时间延长而升高(P＜0.05),PaCO2均随观察时间的延长而降低(P＜0.05).观察组治疗有效率为87.5％,显著高于对照组的70.0％ (P ＜0.05).治疗5d后两组患儿血清CK-MB水平均较前降低(P＜0.05),且观察组明显低于对照组(P＜0.05).结论 猪肺磷脂注射液气管内给药联合NCPAP可以显著降低呼吸衰竭早产儿CK-MB的含量,提高治疗有效率,起到很好的呼吸循环支持作用.     

Survey and practice of reporting quality of randomized controlled clinical trials on traditional Chinese medicine

Evidence obtained from randomized controlled trials （RCTs） has been generally accepted as the gold standard in the evaluation of clinical effectiveness. Readers need to understand the trial design, implementation, results, analysis and interpretation, so as to fully Jnderstand the results of RCTs. Thus, the investigators of RCTs have to report these items in a complete, accurate and clear manner. Since 1998, we have conducted several evaluations on the reporting quality of RCTs published in Chinese journals on traditional Chinese medicine （TCM） and results have shown that there is an urgent need for higher quality RCTs on TCM.     

TCM Treatment of Ankylosing Spondylitis by Tonifying the Kidney and Strengthening the Governor Vessel

Ankylosing spondylitis is a chronic and progressive disorder with inflammation mainly involving the central axis joints. It mainly affects the cervical spine and the lumbosacral area, with the pathogenesis closely related to the kidney and the Governor Vessel (GV). TCM holds that the syndrome is deficiency in origin and excess in superficiality, which is due to insufficiency of the kidney, deficiency of GV, and blocking of the channels with the invasion of exogenous evil, leading to poor circulation of qi and blood and malnutrition of the bones, muscles and joints. The TCM method of tonifying the kidney and strengthening GV to regulate circulation of qi and blood and check the arthralgia pain should be adopted, with the Kidney-Tonifying and GV Strengthening Decoction (益肾强督汤) prescribed.     

IMPROVING P-gp EXPRESSION IN HUMAN MONONUCLEAR CELLS IN VITRO TRANSFECTED BY MULTIDRUG RESISTANCE-1 mRNA

CHEMOTHERAPY playsa greatrolein the treat- ment of malignanttumors,especiallyingynecolo- gicalones.But inanticancerchemotherapy,leuko-cytopeniaisfrequentlytheprimarydose-limitingsideeffect factor.Moreover,cancersarefrequentlychemoresistantbe-causeof overexpressionof P-glycoprotein(P-gp), which isencodedby multidrugresistancegene (MDR1 ) and detectableinup to50% ofhuman cancersand renderscellsresistancetoanticancerdrugs.The safetyand potentialtherapeuticbenefitof mdr1 gene transferredto h…