细胞外基质黏附分子表达与成釉细胞瘤生物学特性的关系

【目的】探讨细胞外基质黏附分子层粘连蛋白（LN）和纤黏连蛋白（FN）与成釉细胞瘤复发和侵袭的关系。【方法】采用免疫组织化学LABC方法检测28例成釉细胞瘤组织中LN和FN的表达。【结果】在28例成釉细胞瘤中，LN和FN在基底膜的阳性表达率分别为46．4％和39．3％，复发性成釉细胞瘤LN和FN在基底膜的阳性表达率明显低于原发性成釉细胞瘤（P〈0．01）。LN和FN的表达形式相似，阳性着色部位均位于基底膜及部分肿瘤细胞的胞浆，在基底膜连续着色的部位，靠近基底膜的肿瘤外周细胞胞浆染色较强，中央内层细胞胞浆染色弱或无，而在基底膜着色缺失的部位，靠近基底膜的肿瘤外周细胞胞浆染色弱或缺失。【结论】LN和FN在基底膜表达缺失与成釉细胞瘤的复发密切相关，可能是成釉细胞瘤局部侵袭的机制之一。     

肥胖者胰岛素抵抗与体脂分布关系的研究

目的应用化学发光等技术,研究正常糖耐量人中正常体质量者及超重/肥胖者胰岛素敏感性的异同,以及体脂含量及分布与胰岛素敏感性的关系。方法对30例居住青岛地区中国人进行化学发光法测定胰岛素及C肽,并应用核磁共振技术(MRI)测定局部体脂。结果①超重/肥胖组较之正常体质量组胰岛素介导的葡萄糖利用率明显降低(P<0.01),以糖原合成障碍为主(P<0.01)。②局部体脂中以腹内脂肪增加对胰岛素敏感性的影响最为显著(r=-0.80,P<0.01)。结论中国人正常糖耐量、超重/肥胖个体胰岛素敏感性下降,腹内脂肪增加是胰岛素抵抗的主要原因。     

早期肠内营养对胃癌患者术后营养状况和免疫功能的影响

目的研究术后早期肠内营养对胃癌患者术后营养状况和免疫功能的影响。方法将60例胃癌患者随机分为肠内营养(EN)组和肠外营养(PN)组各30例。PN组术后行TPN支持;EN组术后第1天起经鼻饲管输注能全力。分别于术前及术后8 d测体重、血清蛋白质、Hb、免疫球蛋白及外周血T淋巴细胞亚群(CD+3、CD+4、CD+8、CD+4/CD+8)等。临床观察生命体征、胃肠道功能恢复情况及各种不良反应。结果EN组术后8 d体重(60.5±5)kg,高于PN组的(58.8±3)kg(P<0.05);肛门排气时间EN组(62±10)h,较PN组(74±15)h显著缩短(P<0.05)。PN组术后CD+3、CD+4、CD+4/CD+8稍下降,而EN组术后CD+3、CD+4、CD+4/CD+8与术前相比无显著变化。术后CD+4/CD+8EN组(1.4±0.3),高于PN组(1.2±0.2),两组比较有统计学意义(P<0.05)。结论早期肠内营养可改善胃癌患者术后营养状态及免疫功能。     

产紫杉醇内生真菌的快速筛选方法研究

试验考察了快速筛选产紫杉醇内共生真菌的方法，分别比较了TLC、HPLC—UV和HPLC—MS方法，结果表明HPLC-MS快速检测紫杉醇的效果较优。     

低分子肝素钙治疗过敏性紫癜及预防肾损害的作用

Objective To investigate the curative effect of low molecular heparin calcium on Henoch-Schoenlein purpura(HSP) and the preventive effect on Henoch-schonlein purpura nephritis.Methods One hundred and three patients with HSP were enrolled in the study and divided randomly into two groups,heparin group(57 cases) and control group(46 cases).Heparin group received low molecular heparin calcisymptom remission time,the incidence of recurrent skin rash were recorded.The contents of D-dipolymer and the three indicators of early renal damage were detected before and after the treatment.Results The remission times of purpura,joint pain and abdominal pain in heparin group[(15.23±3.14) d,(6.80±1.96) d and(6.68±3.42) d]were significantly shorter than those of control group[(17.11±4.79) d,(8.30±2.67)d,(8.59±4.09) d](P ＜0.05).The incidence of recurrent skin rash in heparin group(14.6%) was significantly lower than that of control group(39.1%)(P＜0.01).Compared to control group,the positive rate of D-dipolymer in heparin group was higher(15.8% vs 37.0%),and the urine levels of mALB,β2-MG and NAG were significantly decreased[(12.22±3.92) mg/L,(5.35±0.51) mg/L,(8.12±.65) U/L vs (14.15±5.17) mg/L,(6.54±2.67) mg/L,(10.04±2.60) U/L]during 3 months after treatment(P＜0.01,P ＜0.05).Conclusion Low molecular heparin can shorten the course of HSP and prevent the development of Henoch-Schonlein purpura nephritis.     

吐温80合并温热诱导BGC-823细胞的抑制作用及对凋亡相关因子的影响

目的　观察膜活化剂吐温 80合并温热作用对人胃癌细胞BGC 82 3的抑制效应及其对Hsp70、bcl 2、bax表达的影响。方法　通过MTT法 ,测定 0 .1%及 0 .15 %吐温 80与 4 2℃温热合并作用对BGC 82 3细胞的抑制作用 ;运用免疫细胞化学染色 ,观察 0 .1%吐温 80与 4 2℃温热合并作用后 (0h、8h、16h、2 4h)BGC 82 3细胞Hsp70、bcl 2、bax表达的改变。结果　吐温 80合并 4 2℃10 0min温热作用对BGC 82 3细胞具有明显的抑制效应 ,温热后保留吐温 80继续作用将进一步增强抑制效应 ,合并抑制效应与吐温 80浓度相关 (P <0 .0 1)。合并作用能明显抑制BGC 82 3细胞热作用后的Hsp70表达 ,但bcl 2、bax的表达均增加 ,且bax的表达强于bcl 2 ,并全部分布于胞浆。结论　吐温 80与 4 2℃温热有明显协同抑制肿瘤细胞生长效应 ,对Hsp70和bcl 2、bax表达及分布的影响提示其抑制机理可能与诱导肿瘤细胞凋亡有关。     

扶正健脾方对脾虚厌食症患儿微量元素含量及免疫功能的影响

目的：评价扶正健脾方治疗脾虚厌食症患儿微量元素含量、免疫功能的变化、疗效及应用前景。方法：用扶正健脾方治疗130例脾虚厌食症患儿，每天1剂，水煎服，30天为1个疗程；选择同期健康儿60例作为对照组，观察每疗程前后T细胞亚群、白细胞介素2受体（IL－2R）、免疫球蛋白（Ig）及微量元素的含量变化。结果：脾虚患我治疗前T淋巴细胞亚群异常，尤以CD3、CD4降低明显，IgG含量低，治疗后CD3、CD4、CD4／CD8的比值明显提高（P＜0．01）；IgG、IgA改善明显，治疗前后比较差异有显著性（P＜0．01）；治疗后IL－2R接近正常，治疗组微量元素Zn、Fe的变化较为明显，治疗前后比较差异有显著性（P＜0．01）。结论：扶正健脾方可使脾虚厌食症患儿体液和细胞免疫恢复动态平衡，并改善患儿体内微量元素含量。     

Tei指数在监测妊娠合并心脏病伴肺动脉高压患者右心室功能中的作用

Objective To investigate clinical value of Tei index used for monitoring right ventricular (RV) function in pregnant women complicating cardiac disease accompanying pulmonary hypertension(PH) and the influence on left ventricular(LV) function due to overload pressure of RV. Methods Fifty-eight pregnant women complicating cardiac disease (including 32 cases with congenital heart disease,14 cases with rheumatic heart disease and 8 cases with arrhythmia)were enrolled in this study, among 26 cases coexisted with pulmonary hypertension. According to the pressure of PH, those patients were divided into three groups:11 cases in mild group[30-49 mm Hg (1 mm Hg=0.133 kPa)],9 cases in moderate group (50-79 mm Hg)and 6 cases in severe group (≥80 mm Hg). In the mean time, 15 healthy pregnant women were matched as control. Tei index were measured for LV and RV respectively. Results (1) The isovolumetric relaxation time [IRT,(93±52) ms] and isovolumetric contraction time [ICT,(66±41) ms] of RV in PH group were significantly higher than normal controls [(39±19) ms in IRT and (38±20) ms in ICT] and the other patients without PH group[(59±12) ms in IRT and (43±19)ms in ICT, P<0.01, P<0.05;P<0.05,P<0.05]; however, ejection time (ET) was(239±46) ms significantly shortened in PH group (P<0.05,P<0.01) when compared with (250±41) ms in patients without PH and (299±38) ms in normal controls. Tei index in PH group were 0.72±0.49, which were significantly higher than 0.38±0.12 in normal controls and 0.43±0.16 in patients without PH (P<0.01,P<0.05). (2) The IRT[(99±27)ms] and ICT[(71±40) ms] of LV in PH group were significantly higher than in normal controls [(88±20) ms,(50±24)ms] (P<0.01,P<0.01). ET of LV in PH group [(202±26)ms] were significantly shortened that (290±21)ms in normal controls and (220±36)ms in patients without PH (P<0.01,P<0.05). Tei index of LV in PH group were significantly higher than 0.43±0.15 in normal controls and 0.58±0.21 in patients without PH (P<0.01,P<0.05). (3) Positive correlation between Tei index of RV and pressure of pumonaroy artery were observed (r=0.84, P<0.01). (4) Tei index of RV in severe PH were significantly higher than mild PH (0.75±0.43 vs. 0.68±0.35, P<0.01) and moderate PH (0.75±0.43 vs. 0.71±0.14, P<0.05). Conclusions (1)The Tei index is a novel efficient Doppler index in assessing RV function of pregnant women complicating cardiac disease accompanying PH. And the fluctuation of Tei index might reflect seriousness of the disease. (2) The overload pressure of RV pressure due to PH has significant influence on LV function.     

康心宁对大鼠的抗衰老作用研究

目的 :研究康心宁在大鼠体内的抗衰老作用。方法 :建立实验动物模型 ,分别测定如下指标 :血清胆固醇 (TC)、甘油三酯 (TG)、血清和心脏脂质过氧化物 (LPO)、全血谷胱甘肽过氧化物酶 (GSH- Px)的活性。结果 :康心宁使老年大鼠血清TC、TG、LPO和心脏 LPO水平有不同程度降低 ,以 D组更为明显。 B、D组血清分别为 TC(1 .95± 0 .2 6) mmol/L ,(1 .41± 0 .30 ) mmol/L(P<0 .0 5) ;TG为 (1 .70± 0 .2 4 ) mmol/L,(1 .34± 0 .2 5) mmol/L(P<0 .0 5) ;LPO为 (9.4± 0 .33) μmol/L,(6.5± 0 .1 5)μmol/L(P<0 .0 1 ) ;心脏组织 LPO为 (4.1± 0 .1 8) nmol/mg protein,(2 .2± 0 .2 7) nmol/mg protein(P<0 .0 1 )。 D组 GSH- Px活力也有明显提高。结论 :康心宁可能在延缓衰老、防治老年人易患的心血管疾病方面有着较好的作用。     

紫杉醇诱导肝癌细胞SMMC-7721凋亡的实验研究

目的 :研究紫杉醇 (Taxol)对肝癌细胞SMMC 772 1的生长抑制和诱导凋亡的作用。方法 :应用MTT法观察紫杉醇对SMMC 772 1的生长抑制作用 ,通过瑞氏染色、荧光显微镜、透射电镜 ,流式细胞仪和TUNEL染色研究紫杉醇对SMMC 772 1诱导凋亡的作用。结果 :紫杉醇对肝癌细胞SMMC 772 1有明显的生长抑制作用 ,其IC50 为 2 1.6nmol/L。紫杉醇作用细胞后 ,可看到较为典型的细胞凋亡的形态学变化 ,细胞核固缩、染色质凝集成新月型紧贴于核膜周边 ,核碎裂、染色质片断化、凋亡小体形成等。流式细胞仪上可见S期和G2 /M期和DNA含量增加 ,并出现典型的亚二倍体“凋亡小峰”。TUNEL染色显示。紫杉醇作用于SMMC 772 1后 ,随药物浓度增加和作用时间延长 ,凋亡指数增加。结论 :紫杉醇对SMMC 772 1有明显的生长抑制作用 ;紫杉醇对SMMC 772 1有诱导凋亡的作用。