体外培养人牙髓干细胞的生物学特性

目的 研究体外培养的人牙髓干细胞的生物学特性.方法 收集因正畸拔除的第一前磨牙,用酶消化法分离能够形成克隆且具有高增殖力的细胞,细胞以低密度接种传代培养;免疫荧光法检测第3代细胞表面标志的表达;取第4代细胞,用含有20%胎牛血清、地塞米松、β甘油磷酸钠和维生素C的培养液诱导3周,茜素红染色观察诱导后细胞矿化情况,免疫荧光法检测牙本质涎蛋白(DSP)表达,改良Kaplow氏法检测诱导前后碱性磷酸酶的表达.结果 诱导前细胞表达Stro-1、Cbfa-1、和Ⅰ型胶原,碱性磷酸酶呈弱表达,不表达DSP;诱导后细胞表达DSP,碱性磷酸酶呈强表达,并可见钙结节形成.结论 分离所得细胞具有较高的增殖和分化能力,与间充质干细胞具有相似的表面标志,并在诱导后表达DSP而具备牙髓干细胞的特征.     

rhBMP2对人牙髓干细胞分化及Delta蛋白表达的影响

目的：研究重组人骨形成蛋白2（rhBMP₂）对人牙髓干细胞分化及Delta蛋白表达的影响,为人牙髓干细胞的研究提供理论依据。方法：酶消化法获得人牙髓干细胞,光镜下进行形态学观察,免疫荧光法检测细胞表面标志的表达;取第5代牙髓干细胞, 分为实验组（加含50 μg•L^-1rhBMP₂的培养液）及阴性对照组（只加入培养液）,检测碱性磷酸酶活性和Delta蛋白表达的变化。结果：人牙髓干细胞呈集落状生长, 免疫组织化学检测显示nestin、 vimentin染色呈阳性,免疫荧光法检测STRO-1呈阳性。与阴性对照组比较,实验组第7、14及21天碱性磷酸酶活性均明显升高（P<0.01）,第21天Western blotting法检测Delta蛋白表达明显升高(P<0.05)。 结论：培养的牙髓干细胞具有干细胞特性,并且rhBMP₂可使其碱性磷酸酶活性增高并上调Delta蛋白表达,提示Delta蛋白可能参与牙髓干细胞向成牙本质样细胞分化的过程。     

IGF-1、bFGF对人牙髓干细胞的体外诱导分化的影响

目的研究IGF-1、bFGF对人牙髓干细胞分化的影响.方法酶消化法获得人牙髓干细胞,形态学观察,计算细胞克隆形成率;第3代牙髓干细胞,以IGF-1、bFGF细胞因子诱导,免疫组化染色和RT-PCR方法检测牙本质涎蛋白(dentin sialoprotein, DSP)、牙本质基质蛋白1(dentin matrix protein 1, DMP-1)和牙本质涎磷蛋白(dentin sialophosphoprotein, DSPP)的mRNA的表达.结果人牙髓干细胞呈集落状生长,在体外具有一定的克隆形成能力,经细胞因子刺激后细胞表达DSP、DMP-1蛋白和DSPP的mRNA.结论人牙髓组织中有呈克隆样生长的成体干细胞,IGF-1、bFGF可诱导人牙髓干细胞定向分化.     

人胚胎干细胞向类间充质干细胞的诱导分化及鉴定

目的 建立诱导人胚胎干细胞向类间充质干细胞分化的方法,并鉴定细胞的生物学特性.方法 人胚胎干细胞在无血清条件下悬浮培养形成类胚体,10 d后在含血清条件下使类胚体贴壁生长,5～6 d后机械法剔除类胚体中心区高密度重叠细胞,保留周边铺展细胞并传代扩增.观察诱导分化与传代扩增后细胞的形态学变化;免疫荧光染色和流式细胞术进行细胞表型分析.取第5代细胞进行成脂、成骨和成软骨诱导,3～4周后运用特殊染色及RT-PCT技术检测细胞成脂、成骨及成软骨分化能力.结果 诱导分化后细胞具有与骨髓间充质干细胞相似的形态,扩增能力较强,多次扩增传代后细胞形态和增殖能力无明显改变.免疫荧光染色发现细胞表达中胚层标志波型蛋白(vimentin).流式细胞术分析显示,细胞表达CD29、CD105、CD166等间充质干细胞表面标志.特殊染色及RT-PCT检测结果显示,成脂诱导后多数细胞油红染色阳性,脂蛋白酶和leptin表达增加;成骨诱导后细胞茜素红染色阳性,碱性磷酸酶和Cbfa-1表达增加;成软骨诱导后细胞Ⅱ型胶原染色阳性,Ⅱ型胶原和软骨寡聚基质蛋白(COMP)表达增强.结论 成功诱导人胚胎干细胞向类间充质干细胞分化.分化获得的细胞增殖能力强,表达间充质干细胞的特异性标志,并具有多向分化潜能.     

人胚胎干细胞向类间充质干细胞的诱导分化及鉴定

目的 建立诱导人胚胎干细胞向类间充质干细胞分化的方法,并鉴定细胞的生物学特性.方法 人胚胎干细胞在无血清条件下悬浮培养形成类胚体,10 d后在含血清条件下使类胚体贴壁生长,5～6 d后机械法剔除类胚体中心区高密度重叠细胞,保留周边铺展细胞并传代扩增.观察诱导分化与传代扩增后细胞的形态学变化;免疫荧光染色和流式细胞术进行细胞表型分析.取第5代细胞进行成脂、成骨和成软骨诱导,3～4周后运用特殊染色及RT-PCT技术检测细胞成脂、成骨及成软骨分化能力.结果 诱导分化后细胞具有与骨髓间充质干细胞相似的形态,扩增能力较强,多次扩增传代后细胞形态和增殖能力无明显改变.免疫荧光染色发现细胞表达中胚层标志波型蛋白(vimentin).流式细胞术分析显示,细胞表达CD29、CD105、CD166等间充质干细胞表面标志.特殊染色及RT-PCT检测结果显示,成脂诱导后多数细胞油红染色阳性,脂蛋白酶和leptin表达增加;成骨诱导后细胞茜素红染色阳性,碱性磷酸酶和Cbfa-1表达增加;成软骨诱导后细胞Ⅱ型胶原染色阳性,Ⅱ型胶原和软骨寡聚基质蛋白(COMP)表达增强.结论 成功诱导人胚胎干细胞向类间充质干细胞分化.分化获得的细胞增殖能力强,表达间充质干细胞的特异性标志,并具有多向分化潜能.     

人体脂肪干细胞培养及成骨诱导分化

目的 通过成人脂肪体外分离培养脂肪间充质干细胞（adipose-derived stem cells,ADSCs）研究其生理特性及在特定培养条件下向成骨分化,探讨脂肪源性干细胞作为骨组织工程的种子细胞的前景.方法 从成人脂肪中利用胶原酶消化法分离并体外培养干细胞,流式细胞仪检测细胞表面标记物,CCK8检测细胞活性,P3代脂肪干细胞通过成骨诱导液诱导向骨细胞分化,BCIP/NBT比色法染色检测碱性磷酸酶（AKP）,茜素红染色检测钙结节形成,RT-PCR检测碱性磷酸酶（ALP）、骨桥蛋白（OP）表达变化.结果 成人脂肪间质来源的ADSCs,能稳定传代,增殖能力旺盛;流式细胞检测证实其特异表达相关干细胞表面标记物;成骨诱导后表现出呈典型的成骨细胞形态;ALP染色阳性,茜素红染色阳性,诱导培养0、3、7、14、21、28天后RT-PCR定量检测证实细胞中ALP、OP阳性表达.结论 成人脂肪中可分离得到ADSCs,其稳定表达特异性的表面抗原,并且经过相应诱导培养后可向骨细胞分化,阳性表达OP、ALP,可作为优良的骨组织工程的种子细胞来源.     

兔骨髓间充质干细胞的体外培养、鉴定及诱导分化

目的建立兔骨髓间充质干细胞的体外分离、培养、鉴定方法。方法通过全骨髓贴壁法体外分离、培养、纯化兔骨髓间充质干细胞,进行形态学观察,绘制生长曲线,检测细胞表面标志物,加入诱导剂诱导细胞向成骨、成脂方向分化,油红O染色,检测细胞内碱性磷酸酶(ALT)、甘油三酯(TG)含量。结果兔骨髓间充质干细胞符合正常细胞生长特性,形状以梭形、纺锤形为主,后期多数细胞呈长梭形;细胞生长较旺盛,可连续传7~10代,以第3代细胞状态最佳;第3代骨髓间充质干细胞CD29表达呈阳性,CD34表达呈阴性;成骨、成脂诱导后,油红O染色出现明显脂滴,ALT、TG含量明显增高。结论全骨髓贴壁法可成功分离和培养出兔骨髓间充质干细胞,具有间充质干细胞的一般生物学特性,且生长状态良好,增殖力强,经诱导后具有向成骨和成脂分化的潜能,该方法获得的骨髓间充质干细胞可能成为组织工程的优良种子细胞。     

玻璃粘连蛋白对大鼠骨髓间充质干细胞成骨分化影响

目的体外分离纯化培养大鼠骨髓间充质干细胞(rMSC),研究玻璃粘连蛋白(VN)在rMSC向成骨方向分化过程中的作用。方法贴壁分离培养法分离纯化rMSC,观察第1、3、5、8、10代细胞的增殖情况,并绘制出生长曲线。选第3代细胞用以VN包被的培养板培养,每4d检测碱性磷酸酶活性及钙结节的形成。结果经贴壁筛选法分离的rMSC生长曲线呈S形,第3、4、5代细胞排列具有典型的漩涡状结构;细胞表达CD44、CD90,而不表达CD34。用以VN包被的培养板培养12d,碱性磷酸酶染色呈阳性,硝酸银染色显示有钙结节形成。结论VN有诱导rMSC向成骨方向分化的作用。     

淫羊藿苷对大鼠骨髓间充质干细胞向成骨细胞分化的影响

目的:探讨淫羊藿苷对大鼠骨髓间充质干细胞成骨分化的影响。方法:采用差速贴壁法体外分离培养大鼠骨髓间充质干细胞,流式细胞仪鉴定表面标志。取第3代细胞加入10-6mol/L淫羊藿苷培养基,对照组仅加入等量普通培养基进行培养。通过镜下观察细胞形态,流式细胞仪测定细胞表面标志,碱性磷酸酶试剂盒测定诱导细胞碱性磷酸酶活性,组织化学染色观察钙化结节形成能力。结果:体外培养的细胞表达CD29、CD44、CD105、CD166。淫羊藿苷诱导组细胞碱性磷酸酶呈阳性反应并有钙化结节形成,而对照组未见钙化结节形成。结论:淫羊藿苷能够诱导大鼠骨髓间充质干细胞向成骨细胞分化,可视为一种良好的骨诱导活性因子。     

生殖细胞核因子在骨髓间充质干细胞增殖分化中的表达

目的:研究生殖细胞核因子在骨髓间充质干细胞增殖与分化中的表达.方法:取4～6周BALB/c小鼠,采用全骨髓贴壁筛选法体外培养小鼠BMSCs.取第3代小鼠BMSCs,定向诱导BMSCs向成骨细胞分化,通过检测碱性磷酸酶鉴定诱导后的细胞.采用RT-PCR及间接免疫荧光染色,从mRNA和蛋白水平检测GCNF在小鼠BMSCs诱导分化前后的表达.结果:RT-PCR与间接免疫荧光染色结果同时显示,第3代的小鼠BMSCs和向成骨方向诱导10d后的BMSCs均有GCNF表达.结论:GCNF在BMSCs增殖分化中有表达.     

Value of D-Dimers in patients with acute aortic dissection

Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P ＜ 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (＞0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P ＜0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P ＜ 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.     

Research of combined liver-kidney transplantation model in rats

Objective： To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods： SD rats served as both donors and recipients. 4℃ sodium lactate Ringer＇s was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava （IVC） inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results： Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion： This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.     

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…     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P＜ 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P＜ 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.     

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.     

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.     

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.     

安心颗粒对急诊经皮冠状动脉介入术后生活质量影响的研究

目的：评价使用安心颗粒对急诊经皮冠状动脉介入术（PPCI）术后生活质量的影响.方法：将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组（术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次）和对照组（仅接受基础药物治疗）.所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表（MIDAS）、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果：入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异（P＞0.05）;出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低（P＜0.05）;组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低（P＜0.05）.两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血（P＞0.05）.两组发生轻度血小板减少症的患者数比较无差异（P＞0.05）.结论：PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P＜0.01);the MAP decreased(P＜0.01)and the HR increased drastically(P＜0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.