The expression of p27^(Kip1) and β-catenin in multiple endocrine neoplasia type 1-related parathyroid tumors

Objective To explore tissue expression of cyclin-dependent kinase inhibitor p27Kip1 andβ-catenin in multiple endocrine neoplasia type1（MEN1）-related parathyroid tumors（MHPT）.Methods Immunohistochemistry was performed to analyze the expression of p27Kip1 andβ-catenin in parathyroid glands from 31 subjects

Tiaml gene expression and its significance in colorectal carcinoma

AIM: To explore the expression of Tiam1 gene in colorectal carcinoma and its correlation with tumor metastasis. METHODS: Expressions of Tiaml gene in 8 colorectal carcinoma cell lines were detected by reverse transcriptase-polymerase chain reaction. In vitro invasiveness was determined by means of Matrigel invasion assay. The correlation of Tiaml expression with the invasive ability was also analyzed. RESULTS: Tiaml gene was highly expressed in LoVo and SW620, which were established from metastatic colorectal carcinomas in comparison with LS174T, SW480, HCT116, LST, HRT-18 and Hee8693, which were established from primary colorectal carcinomas. In vitro cell invasivion demonstrated that LoVo and SW620 had a higher invasive ability than LS174T, SW480, HCT116, LST, HRT-18 and Hee8693. The expression of Tiaml gene was highly related to the metastatic potential of colorectal carcinoma cells. CONCLUSION: Tiaml gene may play an important role in invasion and metastasis of colorectal carcinoma and is a metastasis-related gene.

Relationship between expression of triggering receptor-1 on myeloid cells in intestinal tissue and intestinal barrier dysfunction in severe acute pancreatitis

BACKGROUND：Triggering receptor expressed on myeloid cells-1 （TREM-1） in the intestine was upregulated and correlated with disease activity in inflammatory bowel diseases. Membrane- bound TREM-1 protein is increased in the pancreas, liver and kidneys of patients with severe acute pancreatitis （SAP）, suggesting that TREM-1 may act as an important mediator of inflammation and subsequent extra-pancreatic organ injury. This study aimed to investigate the relationship between the expression of TREM-1 in intestinal tissue and intestinal barrier dysfunction in SAP. METHODS： Sixty-four male Wistar rats were randomly divided into a sham operation group （SO group, n=32） and a SAP group （n=32）. A SAP model was established by retrograde injection of 5% sodium deoxycholate into the bile-pancreatic duct. Specimens were taken from blood and intestinal tissue 2, 6, 12, and 48 hours after operation respectively. The levels of D-lactate, diamine oxidase （DAO） and endotoxin in serum were measured using an improved spectro-photometric method. The expression levels of TREM-1, interleukin-1β （IL-1β）, and tumor necrosis factor-α （TNF-α） mRNA in terminal ileum were detected by real-time reverse transcription-polymerase chain reaction （RT-PCR）. Specimens of the distal ileum were taken to determine pathological changes by a validated histology score. The serum levels of D-lactate, DAO and endotoxin were significantly increased in each subgroup of SAP compared with the SO group （P〈0.01, P〈0.05）. The expression levels of TREM-1, IL-1β and TNF-a mRNA in the terminal ileum in each subgroup of SAP were significantly higher than those in the SO group （P〈0.01, P〈0.05）. The expression level of TREM-lmRNA was positively correlated with IL-1βand TNF-α mRNA （r=0.956, P=0.044; r=0.986, P=0.015）, but the correlation was not found between IL-1β mRNA and TNF-a mRNA （P=0.133）. Compared to the SO group, the pathological changes were aggravated significantly in the SAP group. CONCLUSIONS： The expression level of TREM-1 in intestinal tissue of rats with SAP was elevated, leading to the release of inflammatory mediators and intestinal mucosal injury. This finding indicates that TREM-I might play an important role in the development of intestinal barrier dysfunction in rats with SAP.

Adhesion molecule and proinflammatory cytokine gene expression in hepatic sinusoidal endothelial cells following cecal ligation and puncture

INTRODUCTIONMultiple organ dysfunction syndrome (MODS) isthought to be a frequent consequence of sepsis[1-3].Despite substantial advances in our knowledge and understanding of the basic pathophysiologic mechanisms[4-7], in critically ill patients infections and sepsis are still associated with a high mortality[8,9].

Prokaryotic expression, purification of a novel candidate tumor suppressor gene FUS1 and characterization of its polyclonal antibodies

FUS1 is a novel candidate tumor suppressor gene identified in human chromosome 3p21.3. Its expression showed significantly reduction or even loss in lung cancer and other types of cancers. In order to further investigate the biological function of FUS1 protein, FUS1 cDNA from MRC-5 cells was amplified by RT-PCR and cloned into prokaryotic expression vector pQE-30. The recombinant expression plasmids were transformed into M15 strain and grown at 20℃ or 37℃. SDS–PAGE analysis revealed that the accumulation of the recombinant protein FUS1 (rFUS1) in inclusion body forms reached maxium amount when induced with 0.5 mM IPTG for 5 h at 37℃. The inclusion bodies were solubilized in 2M urea and purified by a 6 ×His tagged affinity column under denaturing condition. The purified rFUS1 was identified by electrospray ionization-mass spectrometry (ESI-MS) and tested for purity by HPLC chromatography. The purified rFUS1 proteins were then used to immunize rabbits to obtain anti-human FUS1 polyclonal antibodies, which were suitable to detect both the recombinant exogenous FUS1 and the endogenous FUS1 from tissues and cells by western blot and immunohistochemistry, Available purified rFUS1 proteins and self-prepared polyclonal antibodies against FUS1 may provide effective tools for further studies on biological function and application of FUS1.

TNF-α regulates the expression of transcription factor FoxM1 in bladder cancer and cystitis glandularis

Objective:To study the expression and significance of TNF-transcription factor M1(FoxM1)in bladder cancer and cystitis glandularis(CG).Methods:A total of 30 patients with bladder cancer admitted to our hospital and received surgical treatment from February 2017 to February 2019 were included for the study.During surgery,bladder cancer tissues and normal bladder tissues(tissues more than 5cm away from the cancer tissue center)were collected.Meanwhile,we retained 30 CG tissues from 30 CG patients who received surgical treatment in our hospital at the same time.Bladder cancer cell lines RT4 and BIU87 were cultured and treated with TNF-αat different concentrations(0nM,1nM,5nM,10nM).The expressions of TNF-αand FoxM1 in different bladder tissues were analyzed,and the effects of different concentrations of TNF-αon the expressions of FoxM1 in bladder cancer cell lines and cyclin B1 and cyclin D1 in bladder cancer cell lines were analyzed.Results:The expression levels of TNF-αand FoxM1 in normal bladder,CG and bladder cancer tissues were gradually increased,and univariate analysis of variance showed that the differences between groups were statistically significant(all P<0.05).FoxM1 expression in bladder cancer cell lines treated with TNF-αat concentrations of 0nM,1nM,5nM and 10nM showed a gradual increase trend,and one-way anova showed that the difference between the groups was statistically significant(all P<0.05).After the treatment of bladder cancer cell lines with TNF-αat concentrations of 0nM,1nM,5nM and 10nM,the expression of cyclin B1 and cyclin D1 showed a gradually increasing trend,and one-way anova showed that the difference between groups was statistically significant(all P<0.05).Conclusion:TNF-αmay play a crucial role in the occurrence and development of CG by regulating the expression of transcription factor FoxM1,and then affecting the expression of cyclin B1 and cyclin D1,which is worthy of clinical attention.

EXPRESSION OF mdr-1 GENE IN CANCER TISSUE AND ITS ASSOCIATION WITH MORPHOLOGICAL INDEXES OF ESOPHAGEAL CARCINOMA IN ANYANG

Objective: Overexpression of mdr-1 gene is associated with multidrug resistance (MDR) and aggressive characteristics of malignance. Our purposewas to detect the levels of P-gp expression in fresh untreated esophageal carcinomas, and to correlate these levels to current prognostic indicators of morphology.Methods: Reverse transcription polymerase chain reaction (RT-PCR) was used to investigate mdr-1 gene expression of 46 samples from untreated esophageal carcinoma, and compared the positive incidences among differentiated grades, TNM stages and macroscopic types.Results: All 46 samples were pathologically squamous cell carcinoma. The positive' incidences of mdr-1 gene expression were 37% (17/46) in whole group,35% (6/17), 40% (8/20), 33% (3/9), for Ⅰ,Ⅱ and Ⅲdifferentiated grades, respectively. The expression rates of 33% (6/18), 40% (5/12), and 37% (6/16), were found in Ⅱa, Ⅱ, and Ⅲ stage of TNM, respectively. In macroscopic type view, the positive incidence was 37%(3/8) in constrictive, 33% (5/15) in fungating, 40% (6/14)in marrowlike, 33% (319) in ulcerative type. There were no statistically significant differences among each category system of morphology.Conclusion: The result, high level expression of mdr-1 gene in untreated esophageal carcinoma, suggested the poor efficacy of chemotherapy for some esophageal carcinoma patients. And we should cautiously choose cases who will receive chemotherapy. Surgery is still the best treatment for carcinoma of esophagus. Besides, the data also revealed that the expression of mdr-1 gene in untreated esophageal cancer was independent of morphologic prognostic indexes, and that there were no correlation between mdr-1 gene expression and morphological indexes.

Underexpression of LATS1 TSG in colorectal cancer is associated with promoter hypermethylation

AIM:To investigate large tumor suppressor 1 (LATS1 ) expression, promoter hypermethylation, and microsatellite instability in colorectal cancer (CRC).METHODS:RNA was isolated from tumor tissue of 142 CRC patients and 40 colon mucosal biopsies of healthy controls. After reverse transcription, quantitative polymerase chain reaction (PCR) was performed, and LATS1 expression was normalized to expression of the ACTB and RPL32 housekeeping genes. To analyze hypermethylation, genomic DNA was isolated from 44 tumor CRC biopsies, and methylation-specific PCR was performed. Microsatellite instability (MSI) status was checked with PCR using BAT26, BAT25, and BAT40 markers in the genomic DNA of 84 CRC patients, followed by denaturing gel electrophoresis. RESULTS:Decreased LATS1 expression was found in 127/142 (89.4%) CRC cases with the average ratio of the LATS1 level 10.33 ± 32.64 in CRC patients vs 32.85 ± 33.56 in healthy controls. The lowest expression was found in Dukes' B stage tumors and G1 (welldifferentiated) cells. Hypermethylation of the LATS1 promoter was present in 25/44 (57%) CRC cases analyzed. LATS1 promoter hypermethylation was strongly associated with decreased gene expression; methylated cases showed 162× lower expression of LATS1 than unmethylated cases. Although high-grade MSI (mutation in all three markers) was found in 14/84 (17%) cases and low-grade MSI (mutation in 1-2 markers) was found in 30/84 (36%) cases, we found no association with LATS1 expression. CONCLUSION:Decreased expression of LATS1 in CRC was associated with promoter hypermethylation, but not MSI status. Such reduced expression may promote progression of CRC.

Expression of triggering receptor-1 in myeloid cells of mice with acute lung injury

BACKGROUND： Myeloid cell （TREM-1） is an important mediator of the signal transduction pathway in inflammatory response. In this study, a mouse model of acute lung injury （ALl） by intraperitoneal injection of lipopolysaccharide （LPS） was established to observe the expression pattern of TREM-1 in lung tissue and the role of TREM-1 in pulmonary inflammatory response to ALl.METHODS： Thirty BALB/C mice were randomly divided into a normal control group （n=6） and an ALl group （n=24）. The model of ALl was made by intraperitonal injection of LPS in dose of 10 mg/ kg. Specimens from peripheral blood and lung tissue were collected 6, 12, 24 and 48 hours after LPS injection. RT-PCR was used to detect TREM-1 mRNA, and ELISA was employed for detection of TREM-1 protein and TNF-a protein, and HE staining was performed for the pathological Smith lung scoring under a light microscope.RESULTS： The expressions of TREM-1 mRNAin lung tissue and blood of the ALl group 6, 12, 24, and 48 hours after injection of LPS were higher than those in the control group. The levels of TREM- 1 protein and the levels of TNF-a protein in lung tissue of the ALl group 6, 12, 24, and 48 hours after LPS injection were higher than those of the control group; the level of TREM-1 protein peaked 12 hours after LPS injection, but it was not significantly correlated with the expression of TREM-1 mRNA （P=0.14）; the TNF-a concentration was positively correlated with TREM-1 levels in lung tissue and with Smith pathological score （r=0.795, P=0.001 ：r=0.499, P=0.034）, but not with the expression of TREM-1 mRNA （P=0.176）.CONCLUSION： The expression of TREM-1 mRNA in lung tissue of mice with ALl is elevated, and the expression of TREM-1 mRNA is related to the level of TNF-a and the severity of inflammatory response to ALl. The expressions of the TREM-1 gene are not consistent with the levels of TREM-1 protein, suggesting a new functional protein involved in immune regulation.

HN1L、PLK1在食管胃交界腺癌中的表达及与肿瘤进展和患者预后的关系研究

目的探讨血液和神经表达1样蛋白(HN1L)、Polo样激酶1蛋白(PLK1)在食管胃交界腺癌(AEGJ)中的表达及其与肿瘤进展和患者预后的关系。方法回顾性收集2017年6月至2020年6月邯郸市第一医院手术切除的105例AEGJ组织及其距离肿瘤边缘5 cm处的癌旁组织。采用免疫组化法观察并比较癌组织和癌旁组织HN1L、PLK1表达评分,比较不同临床特征AEGJ患者癌组织HN1L、PLK1表达评分,采用Pearson相关分析两种蛋白表达评分的相关性,根据表达评分分组,生存分析采用Kaplan-Meier生存曲线,预后分析采用多因素Cox回归分析。结果癌组织中HN1L、PLK1表达评分均显著高于癌旁组织(均P<0.05)。相比于肿瘤-淋巴结-远处转移(TNM)分期Ⅰ~Ⅱ期、无淋巴结转移AEGJ患者,TNM分期Ⅲ~Ⅳ期、有淋巴结转移AEGJ患者癌组织HN1L、PLK1表达评分显著升高(均P<0.05)。癌组织HN1L表达评分与PLK1表达评分呈正相关(P<0.01)。AEGJ患者3年总生存率为43.8%。生存分析显示,HN1L高表达组患者和PLK1高表达组患者3年总生存率均显著低于HN1L低表达组和PLK1低表达组(均P<0.01)。多因素Cox回归分析显示,淋巴结转移、TNM分期Ⅲ~Ⅳ期、HN1L和PLK1高表达是影响AEGJ患者预后的独立危险因素(均P<0.01)。结论AEGJ患者癌组织HN1L、PLK1表达与肿瘤恶性程度有关,可作为预测患者预后的潜在指标。

未足月胎膜早破患者血清和胎盘中可溶性髓系细胞触发受体-1与绒毛膜羊膜炎的相关性研究

目的探讨未足月胎膜早破(PPROM)患者血清和胎盘中可溶性髓系细胞触发受体-1(sTREM-1)及炎症介质TNF-α、IL-1β与绒毛膜羊膜炎(CA)的相关性,为疾病早期诊断提供敏感性标志物。方法收集2021年3月至2023年9月金华市中心医院收治的84例PPROM患者,平均孕周为(34.5±2.3)周。根据胎盘病理检查结果分为CA组40例和无CA组44例,并选择同期年龄和孕周匹配的正常妊娠者40例作为对照组。ELISA法检测产前孕妇血清sTREM-1、TNF-α和IL-1β水平,检查血液WBC、粒细胞百分比、CRP和降钙素原(PCT),Western blot法检测产后胎盘中sTREM-1、TNF-α和IL-1β蛋白相对表达量。分析血清和胎盘中各项检测指标的相关性。绘制ROC曲线,分析血清s TREM-1诊断PPROM和CA的效能。结果CA组血清sTREM-1、TNF-α、IL-1β、CRP和PCT水平均显著高于无CA组和对照组,无CA组sTREM-1、TNF-α和IL-1β水平均显著高于对照组(均P<0.05)。CA组胎盘sTREM-1、TNF-α和IL-1β蛋白相对表达量均显著高于无CA组(均P<0.05)。胎盘sTREM-1、TNF-α、IL-1β蛋白相对表达量与血清s TREM-1、TNF-α、IL-1β水平均两两呈正相关(均P<0.001)。血清sTREM-1、TNF-α和IL-1β诊断PPROM的AUC分别为0.916、0.785和0.815(均P<0.05);血清sTREM-1诊断CA的AUC为0.935(P<0.05)。结论PPROM患者血清s TREM-1升高可作为疾病诊断和CA评估的重要血清生化标志物。

TTF-1和P40共表达的非小细胞肺癌2例并文献复习

分析2例共表达甲状腺转录因子1(thyroid transcription factor-1,TTF-1)和蛋白40(protein 40,P40)的非小细胞肺癌(non-small cell lung cancer,NSCLC)患者的临床病理学特征。2例患者均为老年男性,均有长期吸烟史,并伴有胸闷、胸痛、咳嗽等呼吸道症状;CT检查提示肺癌;镜下瘤细胞呈巢团状分布,具有类似鳞状上皮分化特征,可观察到细胞边界和细胞间连接,无腺腔结构和黏液。2例细胞角蛋白(cytokeratin,CK)7、TTF-1、CK5/6、P40、P63均呈弥漫强阳性,P53均呈突变型表达模式,无整合酶相互作用分子-1(integrase interactor-1,Ini-1)和染色质重塑复合物核心催化亚基-1(brahma-related gene 1,BRG-1)表达缺失,细胞增殖指数Ki-67增高。2例均发生肿瘤蛋白53(tumor protein 53,TP53)基因突变。同时具有腺上皮和鳞状上皮分化免疫表型的NSCLC极为罕见,迄今为止8篇文献(含本研究在内)共报道的12例共表达TTF-1和P40的NSCLC病例中,10例检测到TP53基因突变。因病例数极少,2021年世界卫生组织胸部肿瘤分类未提出确切的诊断分型和预后建议,仍需要更多的病例报道补充。

SPP1、DEC1、C1QTNF6蛋白与口腔鳞状细胞癌患者临床病理指标及预后的关系

目的:探讨口腔鳞状细胞癌患者血清重组人分泌型磷蛋白1(SPP1)、软骨分化的表达基因1(DEC1)和补体C1q/肿瘤坏死因子相关蛋白6(C1QTNF6)的表达水平与其临床病理指标及预后的关系。方法:免疫组织化学染色法和电化学发光免疫分析法检测88例口腔鳞状细胞癌患者癌组织和血清中SPP1、DEC1和C1QTNF6蛋白的表达水平;Pearson相关性分析和Kaplan-Meier生存分析法分析患者血清SPP1、DEC1和C1QTNF6蛋白表达水平与其临床病理指标的相关性和对患者预后的影响。多因素Cox回归法分析影响口腔鳞状细胞癌患者预后的危险因素。结果:免疫组织化学染色结果显示口腔鳞状细胞癌患者癌组织中SPP1、DEC1和C1QTNF6蛋白的阳性表达率较癌旁组织分别增加了1.94、2.98和2.35倍(P<0.05或P<0.01);电化学发光免疫分析法结果显示口腔鳞状细胞癌患者血清SPP1、DEC1和C1QTNF6蛋白表达水平较正常人分别上调了8.61、6.20和4.03倍(P<0.05或P<0.01);Pearson相关性分析结果显示患者血清SPP1、DEC1和C1QTNF6蛋白表达水平与患者发生多灶嗜神经侵犯、肿瘤浸润程度、淋巴结转移、较高的TNM分期呈正相关(P<0.05);Kaplan-Meier生存分析结果显示,血清SPP1、DEC1和C1QTNF6蛋白高表达水平的口腔鳞状细胞癌患者总生存率低;多因素Cox回归分析结果表明多灶嗜神经侵犯、肿瘤高浸润度、淋巴结转移和高的TNM分期是影响预后的危险因素(P<0.05)。结论:口腔鳞状细胞癌患者癌组织和血清中SPP1、DEC1和C1QTNF6蛋白表达水平升高,且与患者发生多灶嗜神经侵犯、肿瘤浸润和淋巴结转移、较高的TNM分期呈正相关,而与患者预后呈负相关。

胆固醇酰基转移酶1在非小细胞肺癌患者中的表达水平及其与肿瘤分期、病理分级的关系

目的研究胆固醇酰基转移酶1(ACAT1)在非小细胞肺癌(NSCLC)患者中的表达水平及其与肿瘤分期、病理分级的关系。方法选择2022年1月~2024年1月我院58例NSCLC患者的癌组织标本作为研究组,随机抽取其中20例的癌旁组织标本作为对照组。测试两组标本中ACAT1表达水平,分析ACAT1在NSCLC患者中的表达水平及其与肿瘤分期、病理分级的关系。结果研究组和对照组之间ACAT1 mRNA表达水平的差异具有统计学意义(P<0.05);高表达组和低表达组患者的年龄、性别、吸烟史差异无统计学意义(P>0.05);高表达组和低表达组患者的肿瘤大小、淋巴结转移、远处转移差异具有统计学意义(P<0.05);高表达组和低表达组患者在肿瘤分期和病理分级上差异有统计学意义(P<0.05);ACAT1 mRNA表达水平与肿瘤分期、病理分级之间均呈正相关(P<0.05);ACAT1与肿瘤大小、淋巴结转移、远处转移、肿瘤分期、病理分级有关(P<0.05)。结论ACAT1 mRNA在NSCLC中的表达水平与肿瘤分期和病理分级密切相关。

颅脑外伤患者血清IL-33、sST2、TNF-α、HMGB1水平与病情严重程度及短期预后的关系

目的探讨颅脑外伤患者血清白细胞介素(IL)-33、可溶性生长刺激表达基因2蛋白(sST2)、肿瘤坏死因子-α(TNF-α)、高迁移率族蛋白B1(HMGB1)与病情严重程度及短期预后的关系。方法回顾性分析2022年1月至2024年1月渭南市中心医院收治的142例颅脑外伤患者的临床资料。根据格拉斯哥昏迷量表(GCS)评估病情严重程度分为轻度组(13~15分)(n=47)、中度组(9~12分)(n=59)、重度(3~8分)(n=36)。根据格拉斯哥预后量表(GOS)评估28 d预后分为预后良好组(4~5分)(n=115)、预后不良组(1~3分)(n=27)。收集患者资料,包括性别、年龄、体重指数、吸烟、饮酒、高血压、糖尿病、外伤原因、IL-33、sST2、TNF-α、HMGB1。比较不同病情严重程度、不同预后患者的临床资料;采用Spearman秩相关分析检验颅脑外伤患者病情严重程度与IL-33、sST2、TNF-α、HMGB1水平的相关性;通过受试者操作特征(ROC)分析IL-33、sST2、TNF-α、HMGB1预测颅脑外伤患者预后不良的价值。结果重度组IL-33、sST2、TNF-α、HMGB1水平分别为(40.69±9.64)pg/mL、(7.75±2.14)ng/mL、(252.43±41.37)ng/L、(11.42±3.27)μg/L,中度组IL-33、sST2、TNF-α、HMGB1水平分别为(30.47±7.22)pg/mL、(6.45±1.37)ng/mL、(181.29±22.75)ng/L、(8.05±2.13)μg/L,均高于轻度组[(21.53±5.84)pg/mL、(5.61±1.05)ng/mL、(140.36±16.41)ng/L、(4.87±1.42)μg/L],差异均有统计学意义(P<0.05)。IL-33、sST2、TNF-α、HMGB1水平与颅脑外伤患者病情严重程度呈正相关(r=0.561、0.518、0.593、0.537,P<0.05)。预后不良组IL-33、sST2、TNF-α、HMGB1水平分别为(74.08±20.37)pg/mL、(10.56±2.54)ng/mL、(286.31±42.81)ng/L、(13.45±3.07)μg/L,均高于预后良好组[(22.64±6.19)pg/mL、(6.95±1.73)ng/mL、(153.76±31.45)ng/L、(5.86±1.49)μg/L],差异均有统计学意义(P<0.05)。ROC曲线分析结果显示,IL-33、sST2、TNF-α、HMGB1预测颅脑外伤患者预后不良的曲线下面积为0.891、0.846、0.905、0.928,均有P<0.05。结论IL-33、sST2、TNF-α、HMGB1表达水平随颅脑外伤患者病情严重程度升高而升高,且与其短期不良预后有关。

Caveolin-1在胃癌组织中的表达及临床生物学意义

背景与目的:Caveolin-1作为候选抑癌基因,在多种肿瘤均有异常表达。本研究探讨Caveolin-1在非癌胃粘膜、肠上皮化生、异型增生和胃癌组织以及胃癌细胞系MGC803和BGC823的表达特点。方法:采用冰冻组织微阵列的免疫组织化学(immunohistochemistry,IHC)染色,在完全相同的实验条件下检测56例胃癌及29例非癌粘膜、11例肠上皮化生、7例异型增生组织中Caveolin-1的表达状况,及其与胃癌的临床病理分期、淋巴结转移、Lauren分型及组织学分型的关系。Westernblot和RT-PCR法检测胃癌及相应癌旁组织与MGC-803和BGC-823细胞中Caveolin-1蛋白和RNA的表达情况。结果:免疫组化结果显示,Caveolin-1在非癌胃粘膜、肠上皮化生、异型增生和胃癌中的阳性率分别为86.2%(25/29)、81.8%(9/11)、57.1%(4/7)、17.9%(10/56);胃癌与其它各组间的阳性率有显著性差异(P<0.05)。进展期胃癌的Caveolin-1阳性率(16.0%)低于早期胃癌(33.3%),但无统计学意义(P>0.05)。弥漫型胃癌的阳性率(7.0%)明显低于肠型胃癌(26.9%,P<0.05)。有淋巴结转移的胃癌Caveolin-1阳性率(9.7%)低于无淋巴结转移(31.8%,P<0.05)。Westernblot及RT-PCR结果显示,胃癌组织和相应非癌胃粘膜组织中Caveolin-1的表达无显著性差异,但MGC-803和BGC-823细胞中Caveolin-1表达?

+Gz重复暴露大鼠脑组织中IL-1β和TNF-αmRNA表达变化

目的了解反复高 +Gz暴露后大鼠脑组织中IL 1 β和TNF αmRNA表达变化。方法 2 0只SD大鼠随机分成对照组、+Gz重复暴露后 3 0min、6h、2 4h和 48h五组 ,每组 4只。对照组大鼠G值为 +1Gz ,实验组大鼠在动物离心机上经历了 3次 +1 4Gz/45s(两次间间隔 3 0min)作用。分别于暴露后 3 0min、6h、2 4h和 48h处死大鼠取脑 ,提取总RNA ,用半定量反转录聚合酶链反应 (RT -PCR)检测方法检测大鼠脑组织中IL 1 β和TNF αmRNA表达水平。结果 +Gz暴露后 3 0min、6h和 2 4h大鼠脑组织IL 1 β和TNF αmRNA均有升高 ,但 48h时均恢复正常。结论反复高 +Gz暴露可刺激大鼠脑组织内IL 1 β和TNF αmRNA表达 ,它们在 +Gz所致脑损伤中起一定的作用 。

TNF-αⅠ型受体对小鼠脑血管内皮细胞iNOS和HO-1基因表达的影响

目的探讨TNFαⅠ型受体(TNFR1)对小鼠脑血管内皮细胞iNOS、HO1基因表达水平的影响。方法体外培养TNFR1基因敲除的小鼠脑血管内皮细胞(BVECTNFR1)和野生型小鼠脑血管内皮细胞(BVEC),分别给予5ngmLTNFα刺激24h后,用实时荧光定量PCR技术及Westernblot方法检测两种细胞iNOS基因和HO1mRNA和蛋白表达量。结果给予TNFα刺激后,iNOSmRNA和蛋白表达仅在野生型脑血管内皮细胞内明显增高,而在受体敲除脑血管内皮细胞无明显变化。HO1mRNA和蛋白表达量在野生型小鼠脑血管内皮细胞和受体敲除小鼠脑血管内皮细胞均明显增高。结论TNFα可能作用于脑血管内皮细胞TNFR1,增加iNOS表达,HO1表达增高并非由TNFR1介导,而由TNFα的其他受体介导。

血管细胞黏附分子-1蛋白在人脑胶质瘤组织内表达改变及其临床意义

目的观察不同级别人脑胶质瘤组织中VCAM-1的表达情况,探讨其与脑胶质瘤病理分级的关系及临床意义。方法用免疫组织化学及蛋白免疫印迹技术,检测6例正常脑组织和30例脑胶质瘤组织中VCAM-1蛋白表达情况,比较各级别之间的表达差异,分析VCAM-1蛋白表达水平与脑胶质瘤病理级别的相关性。结果正常脑组织及各级别胶质瘤组织内VCAM-1阳性细胞率分别为:正常5.8%,Ⅱ级26.5%,Ⅲ级69.5%和Ⅳ级79.3%。高级别脑胶质瘤组织内,阳性细胞集中分布于肿瘤微血管周围。脑胶质瘤组织阳性细胞率明显高于正常脑组织(P<0.05);Ⅲ级和Ⅳ级恶性胶质瘤阳性细胞率显著高于Ⅱ级低级别胶质瘤(P<0.05);正常脑组织中VCAM-1表达量较低,胶质瘤组织中表达量则明显增多(P<0.05);Ⅲ级和Ⅳ级恶性胶质瘤内VCAM-1蛋白表达明显高于Ⅱ级胶质瘤(P<0.05);而Ⅲ级和Ⅳ级脑胶质瘤间,VCAM-1蛋白表达则无显著性差异。结论 VCAM-1蛋白在人脑胶质瘤组织中明显高表达,且与脑肿瘤病理级别相关,提示VCAM-1蛋白在脑胶质瘤恶性进展中可能发挥着重要作用。

DJ-1蛋白在卵巢上皮性肿瘤组织和血清中的表达及相关性

目的研究DJ-1蛋白在卵巢上皮性肿瘤组织和血清中的表达及其相关性。方法免疫组织化学染色SABC法测定DJ-1蛋白在74例卵巢上皮性肿瘤和80例非卵巢肿瘤组织中的表达,双抗体夹心法测定其在血清中的含量。结果 1正常卵巢组织中DJ-1表达呈阴性,卵巢肿瘤组织中有不同程度阳性表达。其中卵巢癌DJ-1蛋白表达阳性率高于交界性卵巢肿瘤和良性卵巢肿瘤;低分化和中分化卵巢癌DJ-1表达阳性率均高于高分化的卵巢癌(P<0.05)。2非卵巢肿瘤患者血清DJ-1蛋白含量低于各种卵巢肿瘤患者血清DJ-1含量(P<0.05)。其中卵巢癌患者血清DJ-1蛋白含量高于交界性卵巢肿瘤和良性卵巢肿瘤患者,交界性卵巢肿瘤高于良性卵巢肿瘤;低分化和中分化卵巢癌患者血清DJ-1含量均高于高分化者(P<0.05)。不同手术病理分期和不同组织学分类的卵巢癌DJ-1蛋白阳性表达率和血清DJ-1含量差别均无统计学意义(P>0.05)。3卵巢上皮性肿瘤组织DJ-1蛋白和血清中DJ-1蛋白呈正相关(rs=0.92,P<0.05)。结论 DJ-1蛋白参与卵巢癌的发生和发展,可能成为检测指标及基因治疗的潜在靶点。