微囊化异种甲状旁腺组织移植的研究

目的探讨微囊化异种甲状旁腺(PTG)组织移植对Wistar大鼠甲状旁腺功能低下的治疗作用及微囊的通透性。方法 40只去甲状旁腺Wistar大鼠随机分为微囊组、非微囊组、空囊组、空白对照组。用海藻酸-钡交联微囊包裹兔甲状旁腺组织,移植至Wistar大鼠肾包囊。移植后每隔2周取血测血钙,移植后第16周取移植物进行透射电镜检查及T淋巴细胞、大鼠IgG抗体的免疫组织化学染色。结果微囊组移植后第4周血清钙由(1．62±0．04)mmol／L恢复至正常水平 (2．2～2．6)mmol／L,9例维持至观察期结束(P<0．01),非微囊组、空囊组及空白对照组血清钙差异无统计学意义(P>0．05)。第16周取出移植物检测显示移植物活性良好,微囊周围可见较多T 淋巴细胞浸润,囊壁及囊内IgG抗体染色阳性。结论海藻酸-钡交联微囊可对甲状旁腺组织起到有效的保护作用,使甲状旁腺组织较长时间存活并发挥正常功能。但海藻酸-钡交联微囊并未减轻受体免疫排斥反应的激活且未有效的免疫隔离IgG抗体。     

αVβ3在胃癌组织中的表达及其临床意义

目的:研究整合素αVβ3在胃癌组织中的表达及与胃癌生物学行为的关系。方法:运用免疫组织化学方法检测胃癌组织中整合素αVβ3的表达水平,用改良的Weidner方法计数肿瘤组织微血管密度(microvessel density,MVD),探讨二者的相关性及与患者临床分期和肿瘤病理分级的关系。结果:整合素αVβ3在胃癌原发灶的表达率显著高于邻近正常胃黏膜组织(72.38%vs22.86%,χ2=8.35,P=0.032);浸润性生长、T3～T4期、有淋巴结转移和有远处转移的胃癌组织中αVβ3阳性表达率显著高于膨胀性生长(χ2=14.97,P=0.002)、T1～T2期(χ2=15.21,P=0.015)、无淋巴结转移(χ2=17.89,P=0.025)和无远处转移(P<0.05)的胃癌组织。浸润性生长、T3～T4期、有淋巴结转移和有远处转移的胃癌组织中MVD高于膨胀性生长(t=10.150,P=0.001)、T1～T2期(t=5.961,P=0.001)、无淋巴结转移(t=3.819,P=0.01)和无远处转移(P<0.001)的胃癌组织,且与整合素αVβ3表达呈正相关。结论:整合素αVβ3与胃癌组织生物学行为、临床分期、淋巴结转移状况等密切相关,可促进胃癌血管生成,其表达的检测对判定胃癌淋巴结转移程度、临床分期具有一定临床价值。     

紫杉醇诱导体外培养胃腺癌细胞系SGC-7901凋亡

目的：研究紫杉醇对胃腺癌细胞系SGC—7901的凋亡诱导作用。方法：紫杉醇不同浓度、不同作用时间分别处理胃腺癌细胞系SGC—7901。采用MTT法测定胃癌细胞的生长抑制率，通过组织学观察、TUNEL等手段检测胃腺癌细胞系SGC--7901细胞凋亡情况。结果：紫杉醇对胃腺癌细胞系SGC—7901有明显的抑制作用，并在一定剂量和时间范围内诱导胃腺癌细胞系SGC—7901凋亡，随着药物浓度的增加及时间的延长，凋亡细胞明显增多，当紫杉醇作用浓度为20μmol/L以上时，细胞出现破碎、坏死。结论：紫杉醇对胃腺癌细胞系SGC—7901有明显的抑制作用，诱导凋亡是其发挥抗癌作用的机制之一。     

脑梗死患者急性期血小板功能定量分析

目的 :比较急性脑梗死 (ACI)患者与健康人血小板功能的不同。方法 :检测 3 2例ACI患者和 18名对照组人群的血小板粘附率 (PAdT)、血小板聚集率 (PAgT)以及血小板膜糖蛋白CD41、CD62p和CD63的阳性表达率。结果 :ACI患者组PAdT、PAgT、CD41、CD62p和CD63的检测值分别为 ( 3 1± 13 ) %、( 4 0± 14 ) %、( 12 3 4± 3 3 1) %、( 7 82± 2 5 9) %、( 2 1 3 4± 6 63 ) % ;对照组上述检测值分别为 ( 2 2± 9) %、( 2 7± 13 ) %、( 8 98± 2 5 0 ) %、( 4 87± 1 79) %、( 17 87± 4 45 ) %。结论 :ACI患者血小板粘附、聚集、释放等功能增强 ,血小板活化与ACI的发病机制有关。     

500株细菌对环丙沙星药物敏感试验

５００株细菌对环丙沙星药物敏感试验仲淑英，潘尚哈，路娟，王美村，范淑珍，孙鹰滨，田锦（哈尔滨医科大学第一附属医院，哈尔滨１５０００１）１９９２年１月至１９９４年６月从住院病人送检标本，分离出５００株致病菌，用环丙沙星纸片测定敏感性，采用Ｋ－Ｂ法，用Ｍ...     

二氢青蒿素对胰腺癌生长的抑制作用

Objective To investigate the anti-tumor activity of dihydroartemisinin in pancreatic cancer in vitro and in vivo. Methods For cultured cells,cell growth was determined by the MTT assay and apoptosis was evaluated by flow cytometry analysis stained with Annexin V-FITG/PI. The protein expression in BxPC-3 cells was analyzed by Western blot assay. BxPC-3 cells were injected subcutaneously into nude mice to establish pancreatic xenograft tumors and the tumor volume was monitored after exposure to dihydroartemisinin. Ki-67 staining and TUNEL assay were used to assess tumor cell proliferation and apoptosis in tumor tissue. Results After treatment by dihydroartemisinin in vitro, the proliferative inhibition rates of pancreatic cancer cells BxPC-3 and AsPC-1 reached up to (76.2 ± 3.5) % and (79.5 ± 2.9) %, and the apoptosis rates were up to (55.5 ± 3.2)% and (40.0 ± 3.5)%, the differences were significantly (P ＜ 0.01) compared with control [(2.0 ± 1.3) % and (0.9 ± 0.4) %]. Dihydroartemisinin inhibited the growth of pancreatic xenograft tumors in nude mice. The proliferation index and apoptusis index were (49.1 ± 3.9)% and (50.2 ± 4.4)% respectively in dihydroarternisinin 50 mg/kg treatment group, compared to those of (72.1 ± 3.3) % and (9.4 ± 2.9) % in control, the differences were significantly (P ＜0.01). Western blot assay indicated that dihydroartemisinin up-regulates expression of proliferation-associated protein p21WAF1 and down-regulates expression of PCNA, increases expression of apoptosis-associated protein Bax and decreases expression of Bcl-2 and activates caspase-9 in BxPC-3 cells. Conclusions Dihydroartemisinin exerts anti-tumor activity in pancreatic cancer both in vitro and in vivo by proliferation inhibition and apoptusis induction. Dihydroartemisinin can be used as a potential anti-tumor drug in pancreatic cancer.     

用聚合酶链反应检测乳头瘤病毒DNA

本文应用PCR检测阴道炎,宫颈糜烂和宫颈癌病变部位分泌物中的乳头瘤病毒DNA,共138例,结果表明:44例阴道炎中8例阳性占18.18％,80例宫颈糜烂中37例阳性占46.25％,14例宫颈癌11例阳性占78.5％,所设对照组20例正常标本均为阴性。目前,用核酸杂交试验已将HPV分成至少50多个型,本文实验所用引物可以扩增所有型的HPV。并且本实验模板制备方法非常简单,不会引起模板丢失。因此,聚合酶链反应非常适用于快速检测乳头瘤病毒的感染,实验表明乳头瘤病毒与宫颈糜烂和宫颈癌的发生密切相关。     

单相抑郁症与5-羟色胺受体候选基因的关联研究

目的 探讨中国汉族人5-羟色胺受体4个候选基因(5-HT2A受体基因、5-HT2C受体基因、5-HT1Dβ受体基因、5-HT6受体基因)与单相抑郁症的遗传关联性.方法 应用聚合酶链式反应扩增技术与限制性片断长度多态性技术(PCR-RFLP)分析5-羟色胺受体4个候选基因多态性,对132例抑郁症患者和180名正常对照者进行关联分析;采用汉密顿抑郁量表(HAMD)评定病例组症状表型.结果 (1)5-HT2A、5-HT1Dβ日和5-HT6的基因型和等位基因频率在病例组和对照组中差异无显著性(P＞0.05).(2)5-HT2C基因型在2组中分布差异有显著性(x2=7.0887,P＜0.05),但进一步按性别分层分布差异无显著性(P＞0.05).(3)5-HT2A、5-HT2C和5-HT6病例组中HAMD各因子评分在三种基因型间分布差异无显著性(P＞0.05);5-HT1Dβ病例组HAMD各因子评分,其中日夜变化症状G/G基因型[(1.74±1.25)分]和T/G基因型[(1.61±1.06)分]分值均低于T/T基因型[(2.44±1.19)分],在绝望感症状群中T/G基因型[(7.09±1.93)分]分值为低于G/G基因型[(7.82±1.85)分]和T/T基因型[(8.33±2.22)分].结论 5-HT2C受体基因可能与中国汉族人单相抑郁症有关联,5-HT1Dβ受体基因T/T基因型可能是单相抑郁症患者日夜变化症状的危险因子,T/G基因型可能是绝望感症状群的保护性因素.     

亚甲基四氢叶酸还原酶基因C677T多态性与偏头痛的相关性研究

目的 探讨哈尔滨地区汉族人群中偏头痛患者亚甲基四氢叶酸还原酶(methylenetetrahydrofolate re-ductase,MTHFR)基因C677T位点多态性与偏头痛的相关性.方法 研究包括182例偏头痛患者(有先兆偏头痛43例,无先兆的偏头痛患者139例);健康对照103例.应用聚合酶链反应一限制性片段长度多态性(PCR-RFLP)方法检测MTHFRC677T.基因型.采用x2检验,t检验对实验结果进行统计分析.结果 (1)MTHFR基因型分布在病例组和对照组之间差异无统计学意义(P＞0.05);病例组与对照组间等位基因频率分布差异无统计学意义(P＞0.05).(2)偏头痛临床特征在野生型和突变型之间,在起病年龄、病程、头痛频率、头痛程度、有无先兆症状方面比较差异无统计学意义(P＞0.05),而在疼痛持续时间、伴随症状方面比较差异有统计意义(P＜0.05).结论 本研究显示:(1)MTHFR基因C677T位点多态性可能与哈尔滨地区汉族人群偏头痛的发病无相关性.(2)在哈尔滨地区汉族人群偏头痛患者中,MTHFR基因突变型(CT、TT型)与起病年龄、病程、头痛频率、头痛程度、有无先兆症状无相关性,而与头痛发作持续时间、伴随症状可能具有相关性.     

β-FIBRINOGEN PROMOTER-455 G／A （HaeⅢ） POLYMORPHISM PREDICTION OF PLASMA FIBRINOGEN BUT NOT OF ISCHEMIC CEREBROVASCULAR DISEASE

Objective The-455 G/A (HaeⅢ) polymorphism of β-fibrinogen gene influences levels of plasma fibrinogen. We further investigated whether it influences the risk of isehemie cerebrovaseular disease. Methods We accumulated 134 acute isehemic eerebrovaseular disease (ICVD) eases and compared their -455 G/A status with a control group (n=166). The β-fibrinogen gene -455 G/A polymorphism was analyzed for all subjects by PCR-RFLP with the restrictive enzyme HaeⅢ. Results Plasma fibrinogen was higher in AA homozygous participants (341mg/dL) than in participants carrying the G allele: GA (290mg/dL), GG (298mg/dL) in the control group. Plasma fibrinogen was also higher in AA homozygous patients (353mg/dL) than in eases carrying the G allele: GA (287mg/dL), GG (302mg/dL) in the ICVD group. However, there was no significant association between β-fibrinogen gene -455 G/A polymorphism and ICVD group. Conclusions Although a small effect cannot be excluded, β-fibrinogen gene -455 G/A polymorphism is an independent predictor of plasma fibrinogen, but not of isehemie cerebrovaacular disease.