硫氢化钠后处理对培养心肌细胞缺氧/复氧损伤的保护作用

目的 探讨硫化氢供体--硫氢化钠(NaHS)后处理对原代培养的新生大鼠心肌细胞缺氧/复氧损伤的保护作用.方法 体外培养原代新生大鼠心肌细胞建立缺氧/复氧损伤模型,并随机分为4组:对照组(Normal组)、缺氧/复氧组(H/R组)、缺氧后处理组(HPC组)和硫氢化钠后处理组(H/R NaHS组).4组均为缺氧2 h后复氧2 h,并取5个时间点(缺氧前、缺氧2 h和复氧后 0.5 h、1 h、2 h)检测下列指标: ①心肌细胞存活率;②乳酸脱氢酶(LDH)活性;③丙二醛 (MDA)含量;④超氧化物歧化酶 (SOD)活性.结果 缺氧2 h时,H/R组、HPC组和H/R NaHS组各个指标检测值均无显著差异(P﹥0.05).经缺氧后处理和NaHS后处理后,HPC组和H/R NaHS组的细胞存活率分别为(70.5±2.2)%、(66.2±2.5)%,比H/R组显著升高[(61.3±1.8)%,P﹤0.05)];同时HPC组和H/R NaHS组LDH活性分别为(36.2±1.3)U·L-1、(39.5±1.5)U·L-1,显著低于H/R组[(44.6±1.7)U·L-1,P﹤0.05];HPC组和H/R NaHS组MDA含量分别为(0.905±0.033)mmol·g-1、(0.986±0.042)mmol·g-1,也明显低于H/R组[(1.120±0.045)mmol·g-1,P﹤0.05];而HPC组和H/R NaHS组SOD活性分别为(16.9±1.0)U·L-1、(15.9±1.2)U·L-1,却明显高于H/R组[(13.3±1.5)U·L-1,P﹤0.05].在2 h复氧期内,HPC组和H/R NaHS组细胞存活率和SOD活性始终明显高于H/R组,而LDH活性和MDA含量始终明显低于H/R组(P﹤0.05).结论 NaHS后处理可以提高心肌细胞清除氧自由基的能力,从而有效减轻缺氧/复氧造成的心肌细胞损伤.     

活性氧在顺铂致HepG2凋亡中的作用

目的利用Acivicin阻断GGT的功能,观察其单独对HepG2凋亡及联用顺铂后对HepG2的凋亡、细胞内ROS产生的影响.方法细胞毒性测定采用MTT法.Acivicin和顺铂分别或联合处理HepG2细胞.采用DCFH-DA能被ROS作用发光的特性.通过流式细胞仪测定细胞内ROS的变化.凋亡检测采用细胞凋亡原位检测法(TUNEL法).结果MTT法测定HepG2I IC50值Acivicin为1.4 mmol/L,顺铂为67μmol/L.Acivicin 1.4 mmol/L和顺铂67μmol/L以及Acivicin(1.4mmol/L) 顺铂(67μmol/L)HepG2 24h细胞内的ROS显著升高,尤其是在当与顺铂联用时HepG2细胞内的ROS升高就更加明显.TUNEL法测定Acivicin(1.4 mmol/L)在24、48、72 h致HepG2的凋亡率分别分(16.3±3.5)%、(27.9±4.3)%、(47.2±3.0)%.与对照组相比差异显著(P＜0.05).顺铂(67μmol/L)HepG2 24h的凋亡率为(73.4±1.5)%,Acivicin(1.4 mmol/L) 顺铂(67 μmol/L)HepG2 24h的凋亡率为(94.7±0.5)%,较单用显著增加(P＜0.01.结论顺铂致HepG2凋亡的机制之一是增加细胞内ROS的产生.Acivicin抑制GGT,干扰GSH代谢,可致HepG2细胞内的ROS升高,使细胞凋亡,并增强顺铂的细胞毒性.     

顺铂联合卡铂对骨肉瘤细胞毒作用的实验研究

目的 :通过半量顺铂和卡铂联合与单一顺铂或卡铂对骨肉瘤细胞株 (OS - 732 )的细胞毒性的对比研究 ,为顺铂联合卡铂治疗骨肉瘤提供实验依据。方法 :用IC50 的顺铂、IC50 的卡铂、 1/2IC50 的顺铂 +1/2IC50的卡铂与骨肉瘤细胞株 (OS - 732 )的作用 4 8、 72h后计算各组的细胞毒性指数值 (CI)。结果 :IC50 的顺铂、IC50 的卡铂、 1/2IC50 的卡铂与骨肉瘤细胞株 (OS - 732 )的作用 4 8h后CI值分别为 5 5 8%、 5 7 4 %、 5 8 1% ,三组比较无统计学意义 (P >0 0 5 ) ;IC50 的顺铂、IC50 的卡铂、 1/2IC50 的顺铂 +卡 1/2IC50 的卡铂与骨肉瘤细胞株 (OS - 732 )作用 72h后CI值分别为 6 4 4 %、 6 9 8%、 6 8 5 % ,IC50 的顺铂组与 1/2IC50 的顺铂 +1/2IC50 的卡铂组和IC50 的卡铂组比较均有统计学意义 (P <0 0 5 )。IC50 的卡铂组与 1/2IC50 的顺铂 +1/2IC50 的卡铂组比较无统计学意义 (P >0 0 5 )。结论 :半量顺铂、卡铂联合能产生与单独顺铂或卡铂对骨肉瘤细胞株 (OS - 732 )相似的细胞毒性作用。     

顺铂联合卡铂对骨肉瘤细胞株毒性的实验研究

目的探讨半量顺铂、卡铂联合对骨肉瘤细胞株(OS-732)的细胞毒性强度,为临床应用提供实验依据.方法采用MTT法细胞毒性试验,先分别获取顺铂、卡铂对骨肉瘤细胞株的半数抑制浓度(IC50),再分别用IC50的顺铂、IC50的卡铂、1/2IC50的顺铂 1/2IC50的卡铂作用骨肉瘤细胞株48h和72h,比较3组药物对骨肉瘤细胞株的细胞毒性.结果根据相应实验结果制作生长曲线求得顺铂、卡铂对骨肉瘤细胞株的IC50分别为7.6μg/ml和199.0μg/ml.分别用8.0μg/ml顺铂、200.0μg/ml卡铂、4.0μg/ml顺铂 100.0μg/ml卡铂作用48h时,对骨肉瘤细胞株的细胞毒性指数(CI)值依次为(54.7±5.3)%、(56.9±6 3)%、(57.5±5.7)%,3组比较差别无显著性意义(P＞0.05);作用72h时CI值依次为(65.7±4.5)%、(69.4±2.2)%、(68.4±3.6)%,含卡铂的两组与单独顺铂组比较差别均有显著性意义(均P＜0.05).结论半量顺铂、卡铂联合应用能产生单独顺铂或卡铂对骨肉瘤细胞株相似的细胞毒性作用.     

硫氢化钠对高浓度葡萄糖环境下原代人脐静脉内皮细胞的影响

目的观察硫氢化钠(NaHS,外源性的H2S供体)对高浓度葡萄糖环境下原代人脐静脉内皮细胞(HUVECs)的作用。方法以0.125%胰酶和0.01%EDTA灌注法获得HUVECs,分别用5.5 mmol/L葡萄糖、25 mmol/L葡萄糖、25 mmol/L葡萄糖+50μmol/L NaHS及50μmol/L NaHS处理72 h,采用MTT法检测各组细胞的存活率,Western blot法检测H2S生成酶胱硫醚-γ-裂解酶(cystathionine-γ-Iyase,CSE)的变化。结果 MTT检测表明,25 mmol/L葡萄糖组的HUVECs存活率比5.5 mmol/L葡萄糖组下降28.37%(P<0.05),而50μmol/L NaHS和25 mmol/L葡萄糖共同处理组的细胞存活率比25 mmol/L葡萄糖组上升30.3%(P<0.05),50μmol/L NaHS组与5.5 mmol/L葡萄糖组无明显差异(P>0.05)。与5.5 mmol/L葡萄糖组相比,以25 mmol/L葡萄糖处理72 h后能使CSE蛋白的表达下降(P<0.05),而25 mmol/L葡萄糖+50μmol/L NaHS则能改善这种损害作用(P<0.05),CSE蛋白的表达比25 mmol/L葡萄糖组增强。结论高浓度葡萄糖降低人原代脐静脉内皮细胞的生长和存活率,减少CSE蛋白的表达,而NaHS能够减轻高浓度葡萄糖对CSE的作用。     

片仔癀对人骨肉瘤细胞U2OS细胞周期的影响

目的:探讨片仔癀对体外培养的人骨肉瘤U2OS细胞周期的作用及机制.方法:0.8、1.2、1.6mg/ml片仔癀干预U2OS细胞24、48、72h后,MTT检测片仔癀对U2OS细胞的生长抑制作用;片仔癀干预U2OS细胞48h后流式细胞术分析细胞周期的变化;Western blot检测Survivin蛋白的表达.结果:与对照组比较,不同浓度的片仔癀作用24、48、72h后,不同程度的抑制了U2OS细胞增殖,且呈时间和剂量依赖性(P＜0.05);片仔癀干预U2OS细胞48h后细胞发生G2/M阻滞,Survivin蛋白表达较对照组明显降低(P＜0.05).结论:片仔癀可抑制骨肉瘤U2OS细胞的生长,诱导U2OS细胞发生G2/M周期阻滞,周期阻滞的发生与Survivin蛋白表达减少有关.     

零下非结冰UW液保存人工肝用C3A细胞

目的探索零下非结冰（-0.8℃）保存C3A肝细胞的效果以及同细胞凋亡的关系。方法UW液（University of Wisconsin Solution）保存的C3A细胞分为以下2组：-0.8℃组,4℃组。低温保存24h、48h及72h后分别测定细胞存活率及凋亡率、AST释放、尿素合成功能及白蛋白分泌功能。结果零下非结冰（-0.8℃）72hC3A细胞存活率（86.49±2.80）%高于4℃（77.83±3.40）%,P〈0.001;细胞凋亡率（1.26±0.84）%低于4℃（9.16±1.99%,P〈0.001;AST释放（5.30±0.42）U/L低于4℃（8.18±1.05）U/L;细胞尿素合成功能（0.68±0.06）mmol/L优于4℃（0.40±0.07）mmol/L,P〈0.001;白蛋白分泌功能（2.06±0.22）mg/ml优于4℃（1.68±0.18）mg/ml（P=0.002）。结论0.8℃的UW液可明显提高低温保存C3A细胞存活率,有效地保护细胞尿素合成和白蛋白分泌功能。     

零下非结冰UW液成功保存生物人工肝用L-02肝细胞

目的 比较零下非结冰(-0.8℃)与常规低温(4℃)分别用于人工肝用永生化L-02细胞保存的效果,探索零下非结冰保存肝细胞与细胞凋亡的关系.方法 制备好的UW液保存的L-02细胞悬液分为以下2组:-0.8℃组(零下非结冰组),4℃组(对照组).低温保存24、48 h及72 h后,分别测定细胞存活率、凋亡率、坏死率(流式细胞术)及ALT释放、尿素合成功能、白蛋白分泌功能.结果 -0.8℃(零下非结冰)较4℃明显提高了长时间低温保存L-02细胞的存活率[72 h:(70.17±2.82)%vs(60.05 4±3.17)%,P<0.01],降低了细胞凋亡率[72 h:(5.73±1.68)%vs(9.20±2.35)%,P=0.02],抑制了ALT释放[72h:(6.21±O.65)U/L vs(8.68±1.18)U/L,P<0.01],更好地维持了L-02细胞的尿素合成功能[72 h:(1.01±0.14)mmol/L vs(0.66±0.09)mmot/L,P<0.01]及白蛋白分泌功能[72 h:(9.04±0.53)μg/ml vs(7.70±0.52)μg/ml,P<0.01].2组间细胞坏死率差异无统计学意义[72 h:(18.45±1.88)%vs(21.82±3.86)%,P>0.05].结论 零下非结冰可明显维持L-02细胞存活率,降低低温损伤引起的细胞凋亡,有效保护肝细胞尿素合成和白蛋白分泌功能.     

顺铂损伤U2-OS细胞诱导细胞周期阻滞、凋亡及p53、bcl-2、c-myc基因表达的实验研究

目的 探讨顺铂损伤U2骨肉瘤细胞(U2-OS)诱导细胞周期阻滞及凋亡过程中不同时间p53、bcl-2、c-myc基因表达的变化,为提高骨肉瘤化疗敏感性提供理论依据.方法 使用0、0.3、3.0、30.0 μg/mL顺铂作用U2-OS细胞2 h后继续培养0、6、12、24、48 h.采用四唑蓝比色法(MTT法)、流式细胞术、逆转录-聚合酶链反应(RT-PCR)、蛋白免疫印迹发光法(Western blot法)检测顺铂对U2-OS细胞体外增殖、凋亡作用、细胞周期变化及相关基因的表达.结果 不同浓度的顺铂在体外对U2-OS细胞均有抑制作用,其抑制率随着浓度明显增加,且有组间差异(P<0.05).在顺铂损伤早期细胞发生G1期细胞周期阻滞,且仅p53明显表达;继续培养48 h后,30.0 μg/mL顺铂作用过的细胞凋亡率达27.08%,p53、bcl-2和c-myc mRNA及蛋白表达呈现明显组间差异.结论 不同浓度顺铂通过细胞内p53、bcl-2、c-myc基因表达的变化,诱导骨肉瘤细胞凋亡是其抗肿瘤的机制之一.在细胞损伤早期p53的表达诱导了G1细胞周期的阻滞,而中后期p53的表达抑制了bcl-2的表达,促进细胞凋亡的发生.c-myc基因表达的抑制在损伤后期参与了抑制细胞的增殖.     

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.     

Acupuncture Treatment of Vomiting

CASE HISTORY A female patient, 46 years old, head of the foreign affairs department of a certain university in Beijing, paid her first visit on October 9, 2006, with the chief complaint of vomiting for one month. She got vomiting after meals in early September. Before that, she had discomfortable sensation in the stomach due to angry with others, but she didn't pay much attention. Later, it developed into vomiting after eating. After the vomiting, the discomfort would be relieved, but with slight hypodynamia. She was once diagnosed as having 'neurogenic vomiting'. Having taken some western and Chinese drugs, the above symptoms were a little bit improved, but she would have nausea upon eating and with regurgitation. Because of the fear for vomiting, she did not dare to have food intake, with body weight reduction of 6 kilos in one month.     

Qiu Baoguo''''s Experience in Treating Consumptive Syndromes after Radio-Chemotherapies

Radiotherapy and chemotherapy are the important modern medical therapies for malignant tumors,yet they can also bring about serious local and systemic toxic side reactions so to decrease the patient;'s life quality,manifested by a series of consumptive symptoms.Having engaged in the combined work of Chinese and western medicine for nearly 50 years,the research fellow Qiu Baoguo in Henan Provincial Academy of TCM has developed his unique views on the TCM study of consumptive syndromes.The author of this essay had once the fortune tO follow Dr.Qiu in clinic,and specially would like to introduce in the following Dr.Qiu's experience in treating consumptive syndromes after radio-chemotherapies for patients with malignant tumor.     

Insomnia Due to Deficiency of Both the Heart and Spleen Treated by Acupuncture-Moxibustion and Chinese Tuina

OBJECTIVE: To observe therapeutic effects of the comprehensive therapy of acupuncture-moxibustion and Chinese Tuina for treatment of insomnia due to deficiency of both the heart and spleen. METHODS: 92 cases were divided randomly into the treatment group (treated by acupuncture-moxibustion and Chinese Tuina) and the control group (treated by acupuncture-moxibustion). RESULTS: The therapeutic effect of the treatment group was obviously superior to that of the control group (the CHI2 test showed P < 0.01). CONCLUSIONS: The comprehensive therapy of acupuncture-moxibustion and Chinese Tuina can give marked therapeutic effects for treatment of insomnia due to deficiency of both the heart and spleen.