肾细胞癌基质金属蛋白酶-9与血管生成的关系

目的观察基质金属蛋白酶-9(matrix metalloproteinase-9,MMP-9)在肾细胞癌组织中的表达特点及其与微血管密度(microvessel density,MVD)的关系,探讨MMP-9对肾细胞癌血管生成的作用和意义.方法采用SP免疫组织化学染色方法检测55例肾细胞癌组织中MMP-9和CD34的表达,并结合临床病理参数进行综合分析.结果 MMP-9蛋白在肾细胞癌组织中的阳性率为63.63%.肾癌组织中MMP-9的表达显著高于正常肾组织(P＜0.05),且与肿瘤中MVD密切正相关(r=0.456,P＜0.01).MMP-9的表达和肿瘤中MVD均与肾癌的分期、肾包膜侵袭和淋巴结转移密切相关(P＜0.05),而与肾癌组织学类型无关(P＞0.05).结论肾癌组织MMP-9高表达与MVD及肾癌的一些生物学行为、转移发生有密切关系,MMP-9可能是肾癌的重要促血管生成因子之一.     

加热诱导抗原修复技术对HE染色淋巴瘤核固缩的影响

淋巴瘤的治疗效果依赖于正确的病理诊断,而正确的病理诊断离不开优良的组织切片[1].优良的淋巴瘤组织切片表现为切片薄、细胞无重叠、细胞核及染色质形态清晰等.在日常病理诊断工作中,有少部分的淋巴瘤标本,由于前期组织处理不佳,HE染色后出现严重的细胞核固缩现象,造成病理诊断和分型困难.近年有研究采用加热诱导抗原修复来解决HE...     

CXCR4与肿瘤的发生和发展

趋化因子受体-4（chemokinereceptor-4,CXCR4）属趋化因子家族,为G蛋白偶联的7次跨膜受体蛋白,基质细胞衍生因子-12是该受体的唯一配体。目前发现CXCR4在23种不同类型肿瘤中均有表达,与肿瘤细胞的增殖、侵袭、转移及预后密切相关,针对CXCR4靶向治疗可望成为肿瘤基因治疗研究的新热点。     

nm23表达变化与胃癌淋巴结转移的相关性

应用ＳＰ免疫组化方法，研究１１１例原发性胃癌组织ｎｍ２３表达变化与肿瘤组织分型，浸润深度，淋巴结转移，肿瘤细胞增殖和癌胚抗原（ＣＥＡ）表型的关系，发现ｎｍ２３低表达与胃癌组织分型，侵袭程度和ＣＥＡ表型显著相关（Ｐａａｒｓｏｎ列联系数Ｐ＝０．２８，０．３１和０．３８，Ｐ〈０．０５），ｎｍ２３低表达者淋巴结转移率（９０．４％）比正常表达者高（４７．４％，Ｐ〈０．０５），提示ｎｍ２３低表达在胃癌淋巴结转     

cNOS mRNA在格雷夫斯病和桥本甲状腺炎的表达及意义

目的：研究cNOSmRNA在格雷夫斯病（GD）和桥本甲状腺炎（HT）甲状腺组织中的表达及与血管形成的关系。方法：应用原位杂交技术检测46例GD、41例HT和15例正常甲状腺组织中cNOSmRNA的表达情况,并用免疫组织化学CD34染色测量组织的微血管密度。结果：GD和HT中甲状腺上皮细胞、血管内皮细胞及单核／吞噬细胞上均可见cNOSmRNA表达,阳性表达率明显高于正常甲状腺组织。GD在甲状腺上皮细胞cDODmRNA表达,阳性表达率明显高于正常甲状腺组织。GD在甲状腺上皮细胞cNOSmRNA的表达明显高于HT。GD和HT中血管内皮细胞上cNOSmRNA的表达与微血管密度呈正相关。结论：GD和HT甲状腺组织中cNOSmRNA的表达与血管形成有关,cNOS可能参与GD和HT的发病机制。     

谷胱甘肽S转移酶π、P-糖蛋白在骨肉瘤的表达及意义

目的　检测谷胱甘肽Ｓ转移酶（ＧＳＴ－π）、Ｐ－糖蛋白在骨肉瘤、骨软骨瘤、正常骨组织中的表达及其与骨肉瘤临床病理改变之间的关系。　方法　对５３例原发性骨肉瘤、１５ 例骨软骨瘤、１７ 例正常骨组织进行免疫组化染色。　结果　在骨肉瘤中ＧＳＴ－π、Ｐ－糖蛋白的表达明显高于正常骨组织和骨软骨瘤,骨肉瘤中Ｐ－糖蛋白的表达与术前有无化疗明显相关,在骨肉瘤、骨软骨瘤和正常骨组织中Ｐ－糖蛋白与ＧＳＴ－π共同表达率分别为５２．８％ , １３．３％ 和０。　结论　（１）骨肉瘤患者化疗不敏感可能与肿瘤组织中自发性存在Ｐ－糖蛋白和ＧＳＴ－π过表达有关;（２）术前化疗能明显提高Ｐ－糖蛋白的表达,提示骨肉瘤患者预后差可能与自发性和获得性Ｐ－糖蛋白的过表达有关;（３）联合检测ＧＳＴ－π、Ｐ－糖蛋白可作为鉴别良恶性骨肿瘤的有益指标。     

微视频与翻转课堂在病理学教学中的联合应用

在本科生病理学实验课中开展微视频与翻转课堂相结合的教学实践,通过课后小测试、问卷调查等方式进行教学效果评价、教学满意度分析。结果显示,基于微视频的翻转课堂教学模式可提高学生的学习兴趣、自主学习能力和学习效率,有利于学生深入掌握和理解知识,提高学生团队协作意识,促进教学相长。     

抗高血压药物对SHR大鼠主动脉DNA合成速率的研究

Aim To explore the effect of captopril and clonidine on the DNA synthetic rate of aortic smooth muscle cell of spontaneously hypertensive rats.Methods 12 wk old male SHRs (BW 130 g～150 g,n=42) were divided into 3 groups ,each received captopril 20 mg/kg^.d^-1,clonidine 30 μg/kg^.d^-1,and placebo for 12 weeks,respectively.Nomortensive WKY rats served as control (n=8,BW150 g～180 g).During treatment,systolic blood pressure was measured every 4 weeks.Then rats were killed,lumen to wall ratio in aorta was analyzed by morphological methods.Smooth muscle cells were cultured.DNA synthetic rate,concentration of protein and DNA,protein/tissue ratio,and DNA/tissue rate were determined.Results Captopril and clonidine effectively reduced blood pressure and the wall thickening in SHR,DNA synthetic rate,DNA/tissue,and protein/tissue ratio were decreased in captopril treated SHR.All these index were not significantly affected by clonidine.DNA synthetic rate was correlated with SBP in SHR.Conclusion Clonidine and small dose of captopril prevented the development of hypertension in SHR.Captopril,but not clonidine,inhibited DNA synthetic rate in SMC of aorta in SHR.     

乳腺癌组织黏着斑激酶、血管内皮生长因子-C表达与淋巴转移的关系

目的研究黏着斑激酶（FAK）和血管内皮生长因子-C（VEGF-C）在乳腺癌组织中的表达，探讨其与肿瘤淋巴转移的关系及两者的相关性。方法应用免疫组织化学SP法检测92例乳腺癌组织和30例乳腺良性病变组织中FAK、VEGF-C的表达情况。结果92例乳腺癌组织中FAK和VEGF-C的阳性表达率分别为69．6％和46．7％，与良性对照组比较，差异有统计学意义（P〈0．01）；FAK的阳性表达与乳腺癌肿瘤大小、腋窝淋巴结转移、临床分期星正相关（P〈0.01），VEGF-C的表达与乳腺癌腋窝淋巴结转移、临床分期呈正相关（P〈0．05）；乳腺癌组织FAK和VEGF—C的表达呈正相关（P〈0．01，列联系数C≈0．3952）。结论FAK和VEGF-C蛋白的表达与乳腺癌淋巴转移密切相关，FAK可能通过上调VEGF-C的表达，增强其淋巴管生成作用，进而促使乳腺癌细胞的淋巴转移。     

血管内皮生长因子C表达与宫颈鳞状细胞癌局部淋巴管血管生成和浸润转移及预后的关系

Objective To examine the relation among the expression of vascular endothelial growth factor C (VEGF-C) and regional lymphangiogenesis, invasion, metastasis and prognosis in squamous cell carcinoma of cervix.Methods The expression of VEGF-C, lymphatic microvessel density(LMVD) labeled by VEGFR-3, proliferation index (PI) of cancer cells labeled by Ki-67 and microvessel density (MVD) labeled by CD34 in 28 cases of normal cervical epithelium( NCE), 36 cases of cervical intraepithelial neoplasm( CIN ) and 68 cases of squamous carcinoma of cervix (SCC)were detected by immunohistochemistry method. Results The positive rates of expressions of VEGF-C in NCE, CIN and SCC group were 21.43% , 61.11% and 72.06%, respectively. The positive expression of VEGF-C increased remarkably from NCE to CIN and SCC accordingly ( P ＜ 0. 01 ). The expression of VEGF-C in CIN significantly related to MVD ( r =0. 199, P =0. 048). The MVD in the cases with positively expressed VEGF-C in CIN was significantly higher than that with negatively VEGF-C expressed (F =4.112, P = 0. 049 ). The expression of VEGF-C in SCC significantly correlated with LMVD(r=0.288,P=0.017), but not with PI(r=0.085, P=0.489) and MVD(r=0. 181, P=0. 139). The LMVD in the cases with positively expressed VEGF-C in SCC was remarkably higher than that with negatively VEGF-C expressed ( F =6.488, P =0. 013 ). The expression of VEGF-C in SCC significantly related to pelvic lymph node metastasis, intravascular infiltration and survival rate (P ＜0.05 ), but not to patients' age, FIGO staging, histological grading, and depth of stroma infiltration (P ＞0.05 ). In the cases with VEGF-C positive expression in SCC group, the rate of pelvic lymph node metastasis and intravascular infiltration was significantly higher than that in those without the conditions mentioned above ( P ＜0.05 ). The patients' survival rate in the VEGF-C positively expressed cases in SCC group was significantly lower compared with the negative cases ( log rank test, P = 0.0357 ). Conclusion The overexpression of VEGF-C in SCC may result in rapid regional lymphangiogenesis and tumor metastasis, showing a bad prognosis.