细胞外信号调节激酶对细胞周期调控的影响

目的:研究脑缺血后细胞外信号调节激酶(ERK)对细胞周期调控的影响。方法:建立光化学法诱导大鼠局灶性脑缺血模型,随机分为脑缺血组（对照组及干预组）和假手术组。干预组于缺血前30 min尾静脉注入ERK阻滞剂U0126,对照组尾静脉注入相同体积不含U0126的DMSO稀释溶液。应用免疫组织荧光化学法观察细胞周期蛋白D1 ...     

KLF6、p21^WAF1/CIP1、CyclinD1在结直肠癌中的表达及意义

目的研究转录因子KLF6、p21WAF1/C IP1及Cyc linD1在结直肠癌中的表达及意义。方法应用免疫组化Envision法对58例结直肠癌组织、20例结直肠黏膜慢性炎症组织中的KLF6、p21WAF1/C IP1及Cyc linD1蛋白表达进行检测。结果结直肠癌组织KLF6、p21WAF1/C IP1及Cyc linD1蛋白表达率均与结直肠黏膜慢性炎症组织比较有统计学差异（P〈0.05）;KLF6、p21WAF1/C IP1及Cyc linD1蛋白在结直肠癌组织中的表达与其浸润深度及预后有关（P〈0.05）。结论 KLF6、p21WAF1/C IP1及Cyc linD1在结直肠癌的发生发展中可能起重要作用。     

Cyclin D1 expression and novel mutational findings in Rosai-Dorfman disease

Rosai-Dorfman disease (RDD) is an enigmatic histiocytic disorder classically diagnosed by a distinctive combination of pathological features: emperipolesis, or migration of intact haematological cells through the voluminous cytoplasm of lesional histiocytes, and expression of S100 by these histiocytes. The pathogenesis has long been elusive until the recent detection of recurrent and mutually exclusive mutations in several oncogenes in the mitogen-activated protein kinase (MAPK) pathway. Based on these findings, we investigated a cohort of 21 RDD patients and found that the lesional histiocytes in 86% (18/21) of patients exhibited strong and diffuse nuclear Cyclin D1 expression, which not only may provide a diagnostic marker for this sometimes pathologically challenging disease, but also probably reflects constitutive MAPK pathway activation because we additionally identified phosphorylated-ERK expression in 90% (19/21) of cases. Further, we performed massively parallel sequencing on a subset (6/18) of the CyclinD1 positive cases, identifying several mutations that have not been previously reported in RDD. Taken together, our findings bolster the concept of RDD as a disease of MAPK activation in a substantial percentage of cases and enhance the current understanding of the pathogenesis of RDD.     

STAT3、 Bcl-xL、 Bax和CyclinD1在非小细胞肺癌中的表达

目的：分析STAT3、 Bcl-xL、 Bax和CyclinD1在非小细胞肺癌和正常肺组织中的表达及关系, 以进一步探讨其与非小细胞肺癌发生发展的关系.方法：利用SABC免疫组织化学技术检测84例非小细胞肺癌组织及30例正常肺组织中STAT3、 Bcl-xL、 Bax和CyclinD1的表达.结果：（1）STAT3、 Bcl-xL和CyclinD1在非小细胞肺癌组织中的表达水平明显高于正常肺组织（P＜0.05）, Bax在非小细胞肺癌组织有一定表达, 但与其在正常肺组织的表达比较无统计学意义（P＞0.05）;（2）STAT3、 Bcl-xL表达水平与非小细胞肺癌组织学类型有关, 在腺癌组织中的表达明显高于鳞癌, 与肿瘤大小、组织分化程度、 TNM分期及淋巴结转移无关;（3）Bax、 CyclinD1的表达水平与与组织学类型、肿瘤大小、组织分化程度、 TNM分期及淋巴结转移无关（P＞0.05）.结论：STAT3、 Bcl-xL和CyclinD1可能在肺癌的发生发展中发挥重要作用, 由此可望寻找到新的非小细胞肺癌的诊断方法和治疗靶点.     

OVCA1在宫颈病变中表达的意义及与CyclinD1、p16的相关性

目的:探讨宫颈病变中OVCA1与CyclinD1、p16蛋白表达的意义、相关性及与高危型人乳头瘤病毒(high-risk human papillomavirus,HR-HPV)感染的关系.方法:免疫组化法检测89例宫颈癌、30例宫颈鳞状上皮内瘤变(cervical intraepithelial neoplasia,CIN)、21例正常宫颈组织中OVCA1、CyclinD1、p16的蛋白表达情况.结果:OVCA1在正常宫颈、CIN及宫颈癌中蛋白表达的阳性率分别为28.57%、60.00%、84.27%,差异有统计学意义(P<0.01).OVCA1的蛋白表达在低/高级别CIN、早/中晚期宫颈癌中均有统计学差异(P<0.05).OVCA1的蛋白表达与宫颈癌病理分型、分级及有无淋巴结转移无关(P>0.05).OVCA1与Cy-clinD1、p16的蛋白表达均存在正相关(P<0.01).OVCA1的蛋白表达在HR-HPV(+)组高于HR-HPV(-)组(P<0.05).结论:OVCA1蛋白表达异常参与了宫颈病变发生的全过程.OVCA1在宫颈病变发生中的作用机制与CyclinD1、p16的异常表达及HR-HPV感染相关.     

P53CyclinD1P-gp在上皮性卵巢癌发生中的作用及其预后关系

目的：探讨P^53、CyclinD1、P-gP在上皮性卵巢癌发生中的作用及其预后关系。方法：阅读国内外有关文献并进行综述。结果：P^53、CyclinD1、在上皮性卵巢癌的发生、发展过程中起关键作用,P^53、Cyc-linD1、P-gP可作为卵巢癌预后和复发的重要指标。结论：P^53、CyclinD1可能参与上皮性卵巢癌的发生、发展,P^53、Cyclin D1、P-gP可能是卵巢癌治疗靶点。     

cyclinD1及p16蛋白在大肠癌中的表达及与预后的关系

目的：研究cyclinD1（周期素D1）及p16基因表达的蛋白产物在大肠癌组织中的表达及与预后的关系.方法：应用免疫组化ABC法,在55例原发性大肠癌中检测cyclinD1及p16蛋白的表达.结果：cyclinD1蛋白表达阳性率为43.64%（24/55）;p16蛋白阳性表达率为47.27%（26/55）,cyclinD1与p16阳性表达与正常结肠直肠粘膜组织之间有非常显著性差异;cyclinD1阳性表达率在死亡组（64.70%,11/17）与生存组（28.57%,6/21）之间有非常显著性差异（P〈0.01）;p16蛋白阳性表达率在死亡组（5.85%,1/17）与生存组（42.86%,9/21）亦有显著性差异（P〈0.05）.结论：大肠癌发生过程中,存在cyclinD1及p16蛋白表达的异常,p16及cyclinD1过度表达与患者的预后密切相关,对肿瘤预后评估有重要意义.     

Role of cyclinD1 and CDK4 in the carcinogenesis induced by silica

To study the role of cyclinD 1 and CDK4 in malignant transformation of human fetal lung diploid fibroblast cell line （2BS） induced by silica. Methods Recombination vectors with sense and antisense pXJ41-cyclinD1 and pXJ41-CDK4 were constructed, and then transfected into the malignant transformed cells induced by silica, respectively. At the same time, pXJ41-neo was used as the control. Results During the progress of the malignant transformation of 2BS cells induced by silica, cyclinD 1 and CDK4 were overexpressed. Antisense RNA suppressed cyclinD 1 and CDK4 gene expression in the antisense pXJ41-cyclinD1 and pXJ41-CDK4 transfected cells. Antisense RNA led to cell cycle arrest, resulting in lengthened G1 phase （the percentages of cells in the G1 phase changed from 45.1% to 52.7% and 58.0% for cyclinD1 and CDK4 transfected cells, respectively）, and eventually attenuated the increase of the proliferation of malignant transformed cells induced by silica. Compared with malignant transformed cells induced by silica, cells transfected with antisense pXJ41-cyclinD1 and pXJ41-CDK4 showed obviously reduced growth rates. On the 8th day, the suppression rates were 58.69 and 77.43% （the growth rate of malignant transformed cells induced by silica was 100%）, doubling time changed from 21.0 h to 31.4 h and 21.0 h to 42.7 h, respectively, the growth capacities on soft agar of cells transfected by antisense pXJ41-cyclinD1 and pXJ41-CDK4 decreased obviously. Conclusion CyclinD 1 and CDK4 play an important role in maintaining transformed phenotype of the cancer cells.     

p-MAPK、CyclinD1和CDK4蛋白在大肠癌中的表达及相关性

目的 检测p-MAPK、CyclinD1和CDK4蛋白在大肠癌中的表达,并探讨其相关性.方法 选取78例大肠癌组织,距癌灶3 cm以外的癌旁组织,进行组织切片,HE染色进行病理分型,应用S-P免疫组化法对组织中的p-MAPK、Cyclin D1和CDK4进行检测.结果 病理分型后,78例大肠癌中p-MAPK、Cycli...     

周期蛋白D1在先天性与后天性胆脂瘤中的表达

目的通过研究周期蛋白D1(CyclinD1)在先天性胆脂瘤和后天性胆脂瘤的表达,探讨其表达差异的意义。方法选取我院就诊的60例中耳胆脂瘤患者,其中先天性胆脂瘤25例,后天性胆脂瘤35例;同时选取同期3例慢性中耳炎手术患者正常耳廓后皮肤组织作为对照组。采用免疫组化方法检测胆脂瘤组织中CyclinD1的表达。结果 CyclinD1免疫组化染色在先天性胆脂瘤和后天性胆脂瘤中均为阳性表达,但后天性胆脂瘤中阳性表达率高于先天性胆脂瘤,其差异具有统计学意义(P<0.01);CyclinD1在正常皮肤中不表达。结论 CyclinD1在后天性胆脂瘤上皮表达增强,可能是炎症刺激所致。