Vibramycin inhibits the expression of MMP-2 and the invasiveness of PC-3 cells in vitro

Objective To study the inhibition of vibramycin on the expression of matrix metalloproteinase-2 (MMP-2) and the invasiveness of androgen-independent prostatic carcinoma cell line PC - 3 in vitro. Methods Immunohistochemistry stain and transwell chamber were used to investigate the expression of MMP-2 in different concentration of vibramycin treated PC-3 cells and the invasive ability of different concentration of vibramycin treated PC-3 cell. Results The positive rate of MMP-2 inJune 2003 Vol12 No2 PC-3 cells was decreased at a concentration of 5 mg/L of vibramycin and decreased dramatically at the concentration of 10 mg/L. The cells moved throuth the membrane was(82. 0 ± 4.6)/field in the control group, while decreased to(26.1 ±3.6),(7.2 ±2.2) and(3.3± 0.7)/field in 5,10 and 20 mg/L vibramycin treated PC-3 cell respectively. Conclusion Vibramycin can inhibit the invasiveness and metastatasis of PC-3 cells, the mechanism of which is related to the inhibition of MMP-2 in PC-3 cell.10refs.

EGFR/ERK/MMP-2通路调控牙龈纤维化的初步研究

目的探讨表皮生长因子受体/细胞外信号调节激酶/基质金属蛋白酶-2(EGFR/ERK/MMP-2通路调控牙龈纤维化的作用机制。方法收集本院4例因畸形治疗的健康者和4例遗传性牙龈纤维瘤病(HGF)患者牙龈组织标本;苏木素-伊红(HE)染色检测牙龈组织的组织学变化情况;蛋白质免疫印迹检测牙龈组织中EGFR蛋白表达情况。体外培养人牙龈成纤维细胞(HGFs),并分为对照组、EGFR激动剂组、EGFR抑制剂组,EGFR激动剂组添加终浓度为10 ng/ml EGF,EGFR抑制剂组添加终浓度为10μmol/L AG1478,对照组添加10%胎牛血清的DMEM培养液培养细胞,处理48 h后,蛋白质免疫印迹检测细胞中EGFR、ERK1/2、p-ERK1/2、MMP-2蛋白水平;CCK-8法检测细胞增殖情况。结果HGF患者牙龈组织充满粗大的胶原纤维和成纤维细胞,血管偏少,结缔组织处出现轻微炎症。与健康者相比,HGF患者牙龈组织中EGFR蛋白水平升高(P<0.05)。在细胞实验中,与对照组相比,EGFR激动剂组细胞中EGFR、p-ERK1/2/ERK1/2、MMP-2蛋白水平及细胞增殖率升高(P<0.05),EGFR抑制剂组细胞中EGFR、p-ERK1/2/ERK1/2、MMP-2蛋白水平及细胞增殖率降低(P<0.05)。结论EGFR/ERK/MMP-2通路可能通过促进细胞增殖加强牙龈纤维化进程,抑制EGFR的表达从而缓解疾病。

血清CRP/Alb、MMP-2及MCP-1水平与结直肠癌患者腹腔镜根治术后吻合口瘘的关系及其预测价值分析

目的:探究血清C反应蛋白(CRP)/清蛋白(Alb)、基质金属蛋白酶-2(MMP-2)及单核细胞趋化蛋白-1(MCP-1)水平与结直肠癌患者腹腔镜根治术(LRS)后吻合口瘘的关系及其预测价值。方法:纳入2019年2月—2022年10月于我院接受LRS治疗后发生吻合口瘘的41例结直肠癌患者作为观察组。另取同期接受LRS治疗后未发生吻合口瘘的40例结直肠癌患者作为对照组。采用单因素及多因素Logistic回归分析影响结直肠癌患者LRS后吻合口瘘的因素,采用受试者工作特征(ROC)曲线分析各因子预测结直肠癌患者LRS后吻合口瘘的效能。结果:单因素分析发现,血清CRP/Alb、MMP-2及MCP-1水平与结直肠癌患者LRS后吻合口瘘有关(均P<0.05)。经多因素Logistic回归分析发现:血清CRP/Alb、MMP-2及MCP-1水平升高均是结直肠癌患者LRS后吻合口瘘的危险因素(均P<0.05)。经ROC曲线分析发现:血清CRP/Alb、MMP-2及MCP-1水平联合(Log P模型)预测结直肠癌患者LRS后吻合口瘘的效能优于上述三项指标单独预测,曲线下面积(AUC)(0.95CI)为0.863(0.783~0.920)。结论:血清CRP/Alb、MMP-2及MCP-1水平与结直肠癌患者LRS后吻合口瘘密切相关,可作为预测吻合口瘘的辅助指标,且CRP/Alb、MMP-2及MCP-1联合预测价值更高。

RECK、MMP-2、bcl-2蛋白在牙龈瘤患儿牙龈组织中的表达分析

目的 探讨RECK、基质金属蛋白酶-2(MMP-2)、B淋巴细胞瘤-2基因(bcl-2)蛋白在牙龈瘤患儿牙龈组织中的表达情况。方法 选取80例牙龈瘤患儿作为研究对象,所有患儿均行手术治疗,采集肿瘤组织及肿瘤旁健康牙龈组织,采用免疫组化SP法检测样本内RECK、MMP-2、bcl-2蛋白表达情况,比较肿瘤组织及健康牙龈组织中上述表达情况;并随访1年,分析RECK、MMP-2、bcl-2蛋白表达与其复发的关系。结果 肿瘤组织中RECK阳性率为36.25%,低于健康牙龈组织的77.50%,MMP-2阳性率、bcl-2蛋白阳性率分别为73.75%、67.50%,高于对照组的18.75%、22.50%,差异有统计学意义(P<0.05);80例患儿术后随访1年,共出现33例复发,复发率为41.25%(33/80);复发组RECK阳性率为15.15%,低于未复发组的51.06%,MMP-2阳性率、bcl-2蛋白阳性率为90.91%、93.94%,高于未复发组的61.70%、48.94%,差异有统计学意义(P<0.05)。结论 RECK、MMP-2、bcl-2蛋白在牙龈瘤患儿牙龈组织内存在不同表达,RECK阳性表达率低,MMP-2、bcl-2蛋白表达偏高,其表达与复发存在密切关系,可为完善早期治疗工作提供一定指导。

Expressions of MMP-2,-9,TIMP-1,-2,-3 mRNA in Rat Uterus during Estrous Cycle

Zymography and in situ hybridization were used to investigate matrixmetalloproteinase -2, -9 (MMP -2, MMP-9) activities and expressions of MMP -2, -9 and TIMP1, -2, -3 (tissue inhibitors of matrix metallo-proteinases) mRNA in the rat uterus during estrouscycle. The relative activity was semiquanted by using densitometric analysis. The MMP-2(67 kDa) activity in every stage during estrpus cycle was detected by zymography. MMP-2activity was highest at proestrus; higher at estrus and metaestrus; lowest at diestrus. Throughin situ hybridization, MMP -2, -9, TIMP -1~ -3 mRNA mainly in hasal stroma cells of uterineendometrium were detected. The positive signals of MMP -2 and -9 mRNAs in hasal stromacells were shown stronger at proestrus, estrus and metaestrus while they showed the weakest atdiestrus. The expression of MMP -2 mRNA coincided with MMP -2 activity change. MMP-2and -9 mRNAs were also highly expressed in uterine circular muscle at estrus. Weak signals ofMMP -9 mRNA were detected in uterine luminal and glandular epithelial cells at estrus.TIMP -1 mRNA in hasal stroma cells was shown as the strongest expression at estrus andmetaestrus; stronger at proestrus and the weakest at diestrus. TIMP-2 mRNA in basal stromacells was stronger at estrus and diestrus; weaker at proestrus and metaestrus. TIMP -1 and -2mRNAs were also highly expressed in uterine luminal and glandular epithelial cells at estrus.TIMP -3 mRNA in hasal stroma cells revealed the strongest expression at estrus; stronger atdiestrus and metaestrus and showed the weakest at proestrus. The mRNA was also highlyexpressed in uterine circular muscle at estrus. In short, our present results provide evidencethat MMP -2, -9 and TIMP -1~ -3 were involved in rat uterine endometrium reconstructionduring estrous cycle.

LuminalB型乳腺癌原发灶和同侧腋窝淋巴结转移灶中CD147和MMP-2的表达差异及其临床意义

研究细胞外基质金属蛋白酶诱导因子(CD147)和基质金属蛋白酶-2(MMP-2)在luminal B型乳腺癌原发灶和同侧腋窝淋巴结转移灶中的表达差异及其临床意义,探讨CD147及MMP-2在该分型乳腺癌的表达与预后的关系。方法 提取luminal B型的乳腺癌数据,分别对CD147及MMP2进行单基因分析。选取了2013年06月至2018年01月在贵州医科大学附属医院乳腺外科的67名接受手术治疗的女性luminai B型乳腺癌患者。检测其中原发灶与淋巴结转移灶的雌激素受体(ER)、孕酮受体(PR)、人表皮生长因子受体2(HER-2)、Ki-67、CD147和MMP-2的表达。电话随访调查其生存情况。结果 1相关性分析结果表明,MMP-2在淋巴结转移灶中的表达差异与临床分期有关(p<0.05),但与年龄、家族遗传史和肿瘤大小无关(p>0.05);CD147和MMP-2在原发灶和腋窝淋巴结中的表达被分为四个亚组进行分析,CD147和MMP-2的OS(overall survival)总体差异具有统计学意义(p<0.05)。

唾液CA-Ⅵ、MMP-2、CCL28与儿童龋病严重程度关系及预测龋病复发价值

目的:探讨唾液碳酸酐酶Ⅵ(Carbonic anhydraseⅥ,CA-Ⅵ)、基质金属蛋白酶-2(Matrix metalloproteinase2,MMP-2)、CC趋化因子配体28(CC chemokine ligand 28,CCL28)水平在判断儿童龋病病情及预测龋病复发中的应用效果。方法:选取2019年4月至2022年4月我院收治且均完成1 y随访的86例龋病者为研究对象。根据龋失补指数(decay missing fill index,DMFT)将患者分为低龋组(39例,DMFT=1~4)和高龋组(47例,DMFT≥5)。根据治疗后1 y复发情况将患者分为复发(24例)和未复发(62例)。比较低龋组和高龋组入院时唾液CA-Ⅵ、MMP-2、CCL28水平及与DMFT的相关性;比较复发、未复发患者唾液CA-Ⅵ、MMP-2、CCL28水平。分析CA-Ⅵ、MMP-2、CCL28水平对龋病复发的危险度。分析CA-Ⅵ、MMP-2、CCL28水平预测龋病复发的价值。结果:入院时高龋组唾液CA-Ⅵ水平低于低龋组,与DMFT呈负相关;高龋组唾液MMP-2、CCL28水平高于低龋组,与DMFT呈正相关(P<0.05)。入院时、治疗后1 m时复发者唾液CA-Ⅵ水平均明显低于未复发者,MMP2、CCL28水平均明显高于未复发者(P<0.05)。CA-Ⅵ、MMP-2、CCL28水平联合预测龋病复发AUC为0.808,最佳敏感度、特异度分别为91.67%、77.42%。结论:唾液CA-VI、MMP-2、CCL28水平的变化对儿童龋病病情判断提供参考依据,对预后评估具有重要意义。

CD147、MMP-2在胃癌组织中的表达及临床意义

目的 研究胃癌组织中CD147、MMP-2的表达,并分析其与胃癌病理特征的关系.方法 制备组织芯片,采用免疫组织化学法和原位杂交技术分别检测CD147、MMP-2在170例胃癌组织和30例正常胃黏膜组织中的表达情况.结果 CD147、MMP-2蛋白在胃癌组织的阳性表达率为72.9%和77.1%;CD147、MMP-2 mRNA在胃癌组织中阳性表达率为68.8%和74.7%,均明显高于在正常胃黏膜组织(P<0.05).CD147、MMP-2蛋白和CD147、MMP-2 mRNA与胃癌分化程度无关,但与肿瘤浸润程度、淋巴结转移、临床分期有关(P<0.05).胃癌组织中CD147、MMP-2蛋白和CD147、MMP-2 mRNA的阳性表达,分别具有显著正相关性(P<0.05).结论 检测胃癌组织中CD147、MMP-2的表达,可预估胃癌的浸润和转移,对抗肿瘤综合治疗和预后评估具有重要意义.

原发性高血压患者血清sST2、MMP-3和Gal-3水平及其与左心室重塑的相关性研究

探讨原发性高血压患者血清可溶性ST2(sST2)、基质金属蛋白酶(MMP-3)及半乳糖凝集素-3(Gal-3)水平及其与左心室重塑的相关性。选择2019年11月—2021年12月在桂林市人民医院接受治疗的136例原发性高血压患者为研究对象,评估患者左心室质量指数(LVMI)。将136例原发性高血压患者分为伴左心室肥厚与不伴左心室肥厚,其中伴左心室肥厚52例,纳入观察组;不伴左心室肥厚84例,纳入对照组。重点分析患者血清sST2、MMP-3和Gal-3水平,以及血清sST2、MMP-3和Gal-3水平与左心室重塑的相关性。结果显示,观察组血清sST2、MMP-3和Gal-3水平均高于对照组,差异有统计学意义(P<0.05)。研究发现,原发性高血压患者血清sST2、MMP-3和Gal-3水平与左心室重塑有关,血清sST2、MMP-3和Gal-3水平过表达会增加LVMI的风险,检测各项指标水平有助于为临床准确诊断左心室重塑提供重要参考和指导价值。

Effect of small interference RNA on expression of the Skp2 in human chondrocytes cell

Objective:To study the inhibitory effect of siRNA mediated by expression vectors on Skp2 expression in human chondrocytes.Method:Three Skp2 sequences siRNA-59,siRNA-318 and siRNA-504 were designed as target sites using online siRNA design tools.Skp2 siRNA expression vectors were successfully constructed in vitro by gene recombination technology,and the influence of recombinant plasmid transfection on Skp2 mRNA expression was detected.DNA electrophoresis was used to verify the results.Results:The sequence of Skp2 interference was correct by sequence analysis.The expression of Skp2 mRNA in siRNA-59,siRNA-318,siRNA-504 transfection group was significantly lower than that in no-load group and NC group(P<0.05),the inhibition rates of Skp2 mRNA in siRNA-59,siRNA-318 and siRNA-504 were respectively 60%,41%and 64%,and the siRNA-504 transfection group had the highest inhibition rate.Conclusion:The siRNA eukaryotic expression vector of Skp2 gene was constructed successfully which effectively inhibit Skp2 mRNA expression in human chondrocytes cell,and can provide strong evidence for the treatment of osteoarthritis.

Genome-Wide Identification, Evolution and Expression Analyses of GA2ox Gene Family in Brassica napus L.

Gibberellin 2-oxidases(GA2ox)are important enzymes that maintain the balance of bioactive GAs in plants.GA2ox genes have been identified and characterized in many plants,but these genes were not investigated in Brassica napus.Here,we identified 31 GA2ox genes in B.napus and 15 of these BnaGA2ox genes were distributed in the A and C subgenomes.Subcellular localization predictions suggested that all BnaGA2ox proteins were localized in the cytoplasm,and gene structure analysis showed that the BnaGA2ox genes contained 2–4 exons.Phylogenetic analysis indicated that BnGA2ox family proteins in monocotyledons and dicotyledons can be divided into four groups,including two C_(19)-GA2ox and two C_(20)-GA2ox clades.Group 4 is a C_(20)-GA2ox Class discovered recently.Most BnaGA2ox genes had a syntenic relationship with AtGA2ox genes.BnaGA2ox genes in the C subgenome had experienced stronger selection pressure than genes in the A subgenome.BnaGA2ox genes were highly expressed in specific tissues such as those involved in growth and development,and most of them were mainly involved in abiotic responses,regulation of phytohormones and growth and development.Our study provided a valuable evolutionary analysis of GA2ox genes in monocotyledons and dicotyledons,as well as an insight into the biological functions of GA2ox family genes in B.napus.

Eukaryotic expression, purification and activity characterization of human soluble DSG2 extracellular domain protein

Objective:To construct a secretory eukaryotic expression vector of DSG2 fused with the Fc region of the human IgG,to validate its expression in 293T cells,and to purify the secretory protein with biological activity.Methods:The DSG2 extracellular domain fragment gene(DSG2ex),was amplified by PCR,and was inserted into the eukaryotic expression plasmid pCMV3-IgG1 to construct the recombinant eukaryotic expression plasmid-pCMV3-DSG2ex-IgG1.The successfully constructed eukaryotic expression plasmid was transfected into 293T cells to express and secrete DSG2 extracellular domain protein.The targeted protein was purified from the cell culture supernatant by Protein A affinity chromatography and confirmed by Western Blotting and ELISA.Results:The pCMV3-DSG2ex-IgG1 eukaryotic expression plasmid was successfully constructed.The highest protein expression level was obtained with 293T cells after 96 h of transfection.The relative molecular mass of the purified product was between 100 and 130 kDa was estimated by SDS-PAGE,which was consistent with the expectation.The yield of the purified protein reached 0.8 mg/ml with a purity over 90%.The purified DSG2 extracellular domain protein with IgG1 tag was recognized by IgG monoclonal antibodies by Western blotting.Moreover,the ELISA results showed that the prepared DSG2 extracellular domain protein had significant binding activity to human type 55 adenovirus Fiber Knob protein(HAdV-55).Conclusion:A simple and efficient method for eukaryotic expression and purification of human soluble DSG2 extracellular domain protein was successfully established,and biologically active DSG2 extracellular domain protein was purified,which laid the foundation for the later study of its protein function and anti-adenovirus drugs.

Expression of MMP-2,TIMP-2 protein and the ratio of MMP-2/TIMP-2 in gallbladder carcinoma and their significance

AIM: To study the correlation between expression of MMP-2, TIMP-2 protein and the ratio of MMP-2/TIMP-2 and clinicalpathological parameters of patients with gallbladder carcinoma.METHODS: Carcinomas (n=45) and polypoid lesions (n=15) of the gallbladder were studied for the expression of MMP-2 and TIMP-2 protein by immunohistochemical avidin-biotin-complex method and image analysis. Clinicalpathological data of patients with gallbladder carcinoma such as histological type, grade of differentiation, level of infiltration, liver invasion and lymph node involvement, etc, were recorded.RESULTS: There was significant difference between the average level (1.123±0.108 VS 1.030±0.054, P=0.002) of MMP-2, the ratio (1.050±0.013 VS0.937±0.078, P=0.003) of MMP-2/TIMP-2 in gallbladder carcinomas and in polypoid lesions of the gallbladder. Significant difference was found between the expression of MMP-2 in early stage and advanced tumors, but there was no correlation between MMP-2 protein expression and histological type, differentiation degree, infiltration level, lymph node involvement or liver invasion. Although no difference was observed between TIMP-2 expression and histological type or differentiation degree, signific ant difference was found between TIMP-2 expression and different Nevin stage, infiltration level, local lymph node involvement or liver invasion (1.168±0.067 VS1.048±0.075, 1.170±0.062 vs 1.039±0.06g, 1.039±0.076 VS1.147±0.083, 1.048±0.074 vs 1.103±0.095, P＜0.05). MMP-2/TIMP-2 ratio did not correlate with histological type, grade of differentiation and liver invasion, but significant differences were found between MMP-2/TIMP-2 ratio and different Nevin stage, infiltration level and lymph node involvement in patients with carcinoma of gallbladder.CONCLUSION: TIMP-2 and MMP-2/TIMP-2 ratio could reflect more accurately biological characteristic of gallbladder carcinoma and MMP-2/TIMP-2 ratio might be a new significant marker in early diagnosis, in the judgment of invasion or metastasis and the estimate of prognosis in patients with gallbladder carcinomas.

DNA ploidy analysis and expression of MMP-9, TIMP-2, and E-cadherin in gastric carcinoma

AIM： To investigate DNA ploidy and expression of MMP-9, TIMP-2, and E-cadherin in gastric carcinoma and to explore the mechanism of invasion and metastasis of gastric carcinoma. METHODS： Immunohistochemical methods were used to detect the expressions of MMP-9, TIMP-2, and E-cadherin in 156 cases, including 99 cases of gastric carcinoma, 16 cases of adjacent noncancerous mucosa, 16 cases of distant metastases and 25 cases of metastatic lymph node （LN） from gastric carcinoma. Flow cytometry DNA ploidy and S-phase fraction （SPF） analysis were performed on 57 cases, including 47 cases of gastric cancer, 6 cases of adjacent noncancerous mucosa, and 4 cases of distant metastatic cancer. RESULTS： The expression of MMP-9 was significantly correlated with Lauren＇s classification, Borrmann＇s classification, LN metastasis, tumor metastasis, and TNM stage, as well as depth of invasion （all P〈0.05）. The positive rate was lower in noncarcinoma than in carcinoma （31.3% vs 66.7%, P〈0.01）. The expression of TIMP-2 was significantly correlated with Borrmann＇s classification, LN metastasis, and the depth of invasion （all P〈0.05）. The expression of E-cadherin was significantly correlated with differentiation, Lauren＇s classification, Borrmann＇s classification, and LN metastasis, as well as the depth of invasion （P〈0.01 or P〈0.05）. E-cadherin was less expressed in carcinoma than in noncarcinoma （42.4% vs 87.5%, P〈0.01）. There was a positive correlation between MMP-9and TIMP-2 and a negative correlation between MMP-9 and E-cadherin, but no correlation between TIMP-2 and E-cadherin. Also there was a positive correlation between DNA aneuploid rate and differentiation and LN metastasis. SPF that was higher than 15% was positively correlated with tumor size, differentiation and LN metastasis. And there was a significant difference between carcinoma and noncarcinoma in DNA aneuploid rate and SPF. CONCLUSION： With tumor progression and development of heterogeneity, the abnormal expressions of MMP-9, TIMP-2, and E-cadherin or DNA aneuploid rate or high SPF gradually increases, suggesting that they play a crucial role in gastric carcinoma progression. 2005 The WJG Press and Elsevier Inc. All rights reserved

Lymph node micrometastasis and its correlation with MMP-2 expression in gastric carcinoma

AIM： To examine matrix metalloproteinase-2 （MMP-2） expression in gastric cancer tissues and to evaluate its relationship with lymph node micrometastasis. MATERIALS： The authors studied 850 lymph nodes resected from 30 patients with gastric carcinoma who underwent gastrectomy with lymphadenetomy using reverse transcription polymerase chain reaction （RT-PCR） assay in addition to H-E staining. MMP-2 expression of the tumor tissues was detected by immunohistochemical technique （EliVision^TM plus）. RESULTS： MMP-2 expression was positive in 21 （70%） cases and negative in g （30%） cases. No significant correlations were found between MMP-2 expression and other variables such as age, gender, tumor location, tumor diameter, Lauren classification and lymphatic invasion. In contrast, MMP-2 expression correlated significantly with depth of tumor infiltration （P = 0.022）, lymph node metastasis （P = 0.030） and tumor differentiation （P = 0.043）. Lymph node micrometastases were detected in 77 （12.5%） lymph nodes of 14 （46.7%） gastric carcinoma patients. MMP-2 expression was positive in 12 （85.7%） of the 14 patients with lymph node micrometastasis, and in g （56.3%） of the 16 patients without lymph node micrometastasis （P = 0.118）. CONCLUSIONS： Our results demonstrate that MMP-2 expression has significant correlation with tumor invasion, tumor differentiation and lymph node metastases. MMP-2 expression may be an important biological characteristics and significant prognostic parameter of gastric carcinoma. We also conclude that MMP-2 may participate in the development of lymph node micrometastasis of gastric carcinoma. Further investigations are needed to draw a conclusion.

Changes of histology and expression of MMP-2 and nm23-H1 in primary and metastatic gastric cancer

AIM: To investigate the changes of histology and expression of MMP-2 and nm23-H1 in primary and metastatic gastric cancer. METHODS: One hundred and seventy-seven gastric cancer patients with lymph node and/or distal metastasis between 1997 and 2001 were reviewed. Differences in histology of the primary and metastatic gastric cancer were assessed. MMP-2 and nm23-H1 immunoreactivity was compared in 44 patients with tumor infiltration to the serosa layer. RESULTS: Poorly and moderately differentiated metastatic gastric cancer was found in 88.7% (157/177) and primary gastric cancer in 75.7% (134/177) of the patients. The histological type of metastatic gastric cancer that was not completely in accordance with the preponderant histology of primary gastric cancer was observed in 25 patients (14.1%). MMP-2 immunoreactivity in metastatic gastric cancer was significantly stronger than that in primary gastric cancer, while nm23-H1 immunoreactivity showed no difference in primary and metastatic gastric cancer. CONCLUSION: Metastatic gastric cancer presents more aggressive histological morphology and higher MMP-2 immunoreactivity than primary gastric cancer. This heterogeneity may elicit a possible mechanism of gastric cancer metastasis.

COX-2, MMP-7 expression in oral lichen planus and oral squamous cell carcinoma

Objective: To observe cyclooxygenase (COX)-2 expression in normal oral mucosa (NOM), oral lichen planus (OLP) and oral squamous cell carcinoma (OSCC) and explore its significance in the incidence of oral cancer. Methods: The immunohistochemical method and RT-PCR method were applied to detect the expression of COX-2 and MMP-7 in 10 cases with NOM, 33 cases of with OLP and 38 cases with OSCC. Results: The expression of COX-2 mRNA in OSCC tissues (68.4%, 26/38) was significantly higher than in the OLP (24.2%, 8/33) and NOM (0.0%, 0/10) ( P<0.01). The expression of MMP-7 mRNA in OSCC tissues (65.8%, 25/38) was significantly higher than in the OLP (30.3%, 10/33) and NOM (0.0%, 0/10) ( P<0.01). The expression of MMP-7 in OLP was significantly higher than in the NOM ( P<0.05). There was no significant expression of COX-2 protein in NOM, and the positive rate was 42.4% (14/33) and 89.5% (34/38) in OLP and OSCC group, respectively. The COX-2 expression in cancer tissues was significantly higher than in NOM and OLP ( P<0.05). The MMP-7 protein expression in cancer tissues (84.2%, 32/38) was significantly higher than in NOM (10.0%, 1/10) and in OLP (42.4%, 14/33), and the positive rate in OLP was significantly higher than in NOM ( P<0.01). The COX-2 expression was associated with clinical stage ( P<0.05), the MMP-7 expression was associated with clinical stage and lymph node metastasis ( P<0.05). The expressions of COX-2 and MMP-7 mRNA were positively correlated with OSCC. Conclusions: The abnormal expressions of COX-2 and MMP-7 are closely related to the biological behavior of OSCC, the MMP-7 may be induced by COX-2, and further lead to the invasion and metastasis of OSCC.

Effect of Qingguangan on the expressions of MMP-2 and MMP-9 in filtering bleb after trabeculectomy in rabbits

AIM: To explore the effect of Qingguangan on the expressions of MMP-2 and MMP-9 in filtering bleb scarring area after trabeculectomy in rabbit model. METHODS: Thirty-two New Zealand rabbits were randomized into four groups: control group, experimental group, MMC group (ocular trabeculectomy in combination with MMC), and Qingguangan group. Trabeculectomy was performed on both eyes in each group except control group. Qingguangan group was mouth-fed with Qingguangan (solution). On postoperative day 14, the appearances of MMP-2 and MMP-9 on filtrating blebs were observed by immunohistochemistry. RESULTS: Statistical differences of the expressions of MMP-2 and MMP-9 were noted among groups on day 14 following surgery. Histology immunohistochemistry showed significant differences on the expressions of MMP-2 and MMP-9 between each groups( P<0.05). CONCLUSION: Qingguangan can promote the expressions of MMP-2 and MMP-9.

Effects of hepatocyte growth factor on MMP-2 expression in scleral fibroblasts from a guinea pig myopia model

AIMTo investigate the effects of hepatocyte growth factor (HGF) on MMP-2 expression in scleral fibroblasts from guinea pig with LIM.

Expression and significance of MMP-9 and MDM2 in the oncogenesis of lung cancer in rats

Objective:To observe the expression of matrix metalloproteinase-9(MMP-9)and mouse double minute 2 homolog(MDM2)in the oncogenesis of lung cancer in rats and to explore their clinical value.Methods:A total of 140 rats were selected,of which 20 were selected randomly as the control group;and the remaining 120 as the observation group.The observation group was injected with benzopyrene to establish diseases model such as tissue proliferation,abnormal proliferation and lung cancer.Delected the MMP-9 levels of lung tissue by enzyme-linked assay,detected the MDM2 levels of lung tissue by immunochemistry assay.Results:The MMP-9 and MDM2 expression of the lung cancer group and the abnormal proliferation group were significantly higher than that in the tissue proliferation group and the control group,the difference was significant(P<0.05).And the MDM2 expression of the tissue proliferation group was significantly higher than that in the control group,the difference was significant(P<0.05).There was no significant difference in the MMP-9 expression between the tissue proliferation group and the control group(P>0.05).The MDM2 and MMP-9 expression were increased in turn in the small cell carcinoma,squamous cell carcinoma and adenocarcinoma,the difference was statistically significant(P<0.05).The MMP-9 and MDM2 expressions of stageⅢand stageⅣlung cancer tissue in rats were significant higher than that during stageⅠand stageⅡ,the difference was significant(P<0.05).There was no significantly different in the MMP-9 and MDM2 expressions between stageⅢand stageⅣ(P>0.05),and there is no significant difference of the MMP-9and MDM2 expressions between stageⅠand stageⅡ(P>0.05).Conclusions:The expression of MMP-9 and MDM2 in lung tissue was associated with lung disease and lung cancer,both of them may be involved in the development and metastasis of lung cancer.Combined detection can be used as therapy and prognostic indicators for lung cancer.