基质金属蛋白酶-9及其组织抑制物-1在人胎盘的表达及意义

目的研究基质金属蛋白酶-9(matrix metalloproteinases,MMP-9)及其组织抑制物-1(tissue inhibitor of metalloproteinases,TIMP-1)在不同孕期胎盘中的表达及与滋养层细胞侵蚀、子宫-胎儿血管系统建立的关系.方法应用原位杂交法检测56例胎盘(早孕16 例、中孕20 例、晚孕20例)中MMP-9及TIMP-1mRNA的表达.结果 MMP-9及TIMP-1mRNA主要表达于滋养细胞、绒毛间质血管壁及蜕膜组织中;MMP-9mRNA的表达早、中孕组明显强于晚孕组,TIMP-1mRNA的表达晚孕组明显强于早、中孕组,差异均有极显著性(P<0.01).结论 MMP-9及TIMP-1协同表达可能在滋养层细胞侵蚀、孕卵着床、血管重建过程中发挥一定的作用.     

阿司匹林对TNF-α诱导人早孕滋养细胞增殖和侵袭的影响及机制

目的:采用体外细胞模型探讨阿司匹林促进人早孕滋养细胞增殖和侵袭在预防子痫前期(preeclampsia,PE)发生中的作用及机制。方法:收集PE病例20例和正常孕妇作为对照20例;HE染色观察胎盘组织病理改变;ELISA法检测基质金属蛋白酶2(MMP-2)及MMP-9的含量。体外培养人早孕滋养细胞HTR-8/SVneo,分别加入不同浓度的阿司匹林和肿瘤坏死因子α(TNF-α);CCK-8法检测细胞活力;Transwell实验检测细胞侵袭能力;Western blot检测细胞周期蛋白D1(cyclin D1)和增殖细胞核抗原(PCNA)的蛋白表达水平。结果:PE组胎盘组织存在子宫螺旋动脉血管重铸障碍,且孕妇血清中MMP-2及MMP-9浓度明显低于对照组(P0.05)。体外早孕滋养细胞系实验表明,与对照组比较,0.1 mmol/L阿司匹林明显增加细胞活力,且可缓解TNF-α引起的细胞活力降低(P0.05);TNF-α处理滋养细胞后,细胞cyclin D1及PCNA蛋白表达水平显著下降,侵袭能力减弱,培养上清液中MMP-2和MMP-9表达水平及活性均明显下降(P0.05);同时给予0.1 mmol/L阿司匹林和TNF-α处理后,滋养细胞cyclin D1及PCNA蛋白表达水平显著增高,侵袭能力增强,培养上清液中MMP-2和MMP-9表达水平及活性均明显上升(P0.05)。结论:小剂量阿司匹林可以促进绒毛滋养细胞增殖和侵袭,可能有利于改善PE胎盘浅着床和子宫螺旋动脉重铸异常情况。这为阿司匹林预防PE的发生提供实验依据。     

低分子量肝素对滋养层细胞MMP-2、TIMP-2表达及侵袭力的影响

目的:探讨低分子量肝素对体外培养人早孕绒毛滋养层细胞MMP-2、TIMP-2表达及侵袭力的影响。方法:将经胰蛋白酶/DNA酶Ⅰ联合消化,通过Percoll细胞分离液纯化得到的绒毛滋养层细胞进行体外培养。采用不同浓度低分子量肝素干预培养24h后,ELISA法测定细胞上清液中MMP-2、TIMP-2的浓度;采用Tr-answell小室观察滋养层细胞的侵袭能力。结果:不同浓度的低分子量肝素(1.0×102IU/L,1.0×103IU/L,1.0×104IU/L)干预人早孕绒毛滋养层细胞后,与对照组相比,MMP-2的表达上调,滋养层细胞侵袭力增强,在1.0×103IU/L时MMP-2表达最高,滋养层细胞侵袭力最强(P0.05)。TIMP-2的表达随着低分子量肝素浓度的增加而逐渐下降,与对照组比较,在1.0×103IU/L、1.0×104IU/L组明显降低(P0.05),但1.0×103IU/L组与1.0×104IU/L组之间TIMP-2的表达无差异(P0.05)。结论:低分子量肝素可能直接通过影响绒毛滋养层细胞MMP-2、TIMP-2的表达进而影响绒毛滋养层细胞的侵袭能力。     

MM P-2/TI MP-2及VEG F在滋养细胞疾病中的表达及意义

目的 检测不同滋养细胞疾病组织中MMP-2/TIMP-2及VEGF的表达情况,观察比较它们的表达特点,分析与滋养细胞疾病发生、发展的相关性.方法 收集30例正常绒毛;40例葡萄胎组织,30例手术切除的恶性葡萄胎组织,采用单克隆抗体免疫组化SP法对其染色,光镜下分别观察以上不同组织中MMP-2、TIMP-2、VEGF的阳性表达情况.结果 (1)从正常绒毛→良性葡萄胎→恶性葡萄胎,MMP-2的阳性率有升高趋势,差异有统计学意义(P＜0.05).VEGF的表达与MMP-2正相关.(2)TIMP-2的阳性表达在滋养细胞疾病内部不同分组间两两比较,差异均无统计学意义(P＞0.05).(3)MMP-2/TIMP-2组合同时阴性表达在良性葡萄胎中占65%(26/40),在恶性葡萄胎中占16.67%(5/30),两者比较有显著性差异(P＜0.01).MMP-2阳性表达伴TIMP-2阴性表达在良性葡萄胎中占2.5%(1/40),在恶性葡萄胎中占56.67%(17/30),两者比较有显著性差异(P＜0.01).结论 (1)MMP-2和VEGF共同参与了滋养细胞疾病的发生和发展.(2)MMP-2/TIMP-2两者联合检测对鉴别良、恶性滋养细胞疾病有重要价值.     

CXCR7分子对人早孕滋养细胞的调节作用

目的:已有研究表明CXCL12/CXCR4信号途径以自分泌的方式在人早孕滋养细胞增殖和信袭中发挥重要作用,探讨CXCL12的第二受体CXCR7信号对人早孕滋养细胞活力和侵袭功能的调节作用。方法:采用RT-PCR、免疫组化分析CXCR7在人早孕滋养细胞的表达;采用MTT和Transwell侵袭试验分别分析CXCL12/CXCR7信号途径对人早孕滋养细胞活力和侵袭功能的作用。结果:人早孕滋养细胞表达CXCR7分子,外源性给滋养细胞株HTR-8/Svneo添加anti-CXCR4(20μg/ml)和anti-CXCR7(10μg/ml)的中和性抗体后,均能显著抑制滋养细胞的增殖和侵袭能力。结论:人早孕滋养细胞表达CXCR7,通过CXCR7信号升调节滋养细胞的增殖和侵袭,其原因可能是与CXCR4形成二聚体共同参与CXCL12的信号传递。     

MMP-2、TIMP-2和PPARγ在子痫前期患者胎盘中的表达及意义

目的探讨MMP-2、TIMP-2和PPARγ在子痫前期患者胎盘中的表达及其临床意义。方法采用免疫组化SP法检测正常妊娠晚期、轻度子痫前期及重度子痫前期各30例患者胎盘底板中间型滋养细胞MMP-2、TIMP-2及PPARγ的表达。结果 MMP-2在正常妊娠晚期组、轻度子痫前期组及重度子痫前期组的表达强度呈减弱趋势,在重度子痫前期组的表达明显低于正常妊娠晚期组及轻度子痫前期组(P0.05);TIMP-2、PPARγ在正常妊娠晚期组、轻度子痫前期组及重度子痫前期组的表达强度呈增强趋势,各组间差异有显著性(P0.05);子痫前期组患者胎盘组织中MMP-2、TIMP-2及PPARγ的表达呈负相关(P0.05)。结论子痫前期组患者胎盘组织中MMP-2表达下调,TIMP-2、PPARγ表达上调,提示MMP-2、TIMP-2和PPARγ的表达异常可能在滋养细胞的浸润过程中起主导作用;MMP-2、TIMP-2及PPARγ的表达呈负相关,提示三者可能在滋养细胞浸润过程中相互影响,共同参与子痫前期的发病。     

HIV-1协同受体CXCR4、CCR5及相关趋化因子SDF-1在胎盘的表达

目的：研究HIV-1协同受体CXCR4、CCR5及CXCR4的特异性配体SDF-1在人胎盘组织的表达，探索HIV-1子宫内垂直传播的分子机制。方法：半定量RT-PCR检测早、中、晚孕期胎盘及早孕滋养细胞CXCR4、CCR5 mRNA水平；免疫组化和免疫细胞化学检测早孕胎盘及原代培养滋养细胞CXCR4、CCR5蛋白表达；原位杂交及免疫组化分析SDF-1在早孕胎盘的表达；ELISA测定滋养细胞SDF-1的动态分泌水平。结果：各孕期胎盘表达CXCR4及CCR5 mRNA；CXCR4蛋白定位于滋养细胞，而CCR5蛋白定位于绒毛基质中。滋养细胞可转录并翻译SDF-1，且能分泌可溶性SDF-1。结论：滋养细胞同时表达CXCR4及SDF-1，SDF-1可能通过降调CXCR4而拮抗X4-HIV-1感染胎儿细胞；R5-HIV-1或许能通过滋养层裂隙感染CCR5^#基质细胞和/或Hotbauer细胞，从而发生子宫内垂直传播。     

人早孕母胎界面SOCS1、SOCS2、SOCS3表达

目的：研究正常早孕绒毛及蜕膜组织细胞因子信号转导负调控因子（Suppressors of cytoldne signaling，SOCS）基因和蛋白水平表达，以揭示SOCS在母胎界面生理性调节作用。方法：半定量RT-PCR检测早孕绒毛组织、蜕膜组织及原代培养早孕滋养细胞、蜕膜基质细胞SOCS1、SOCS2、SOCS3 mRNA水平；Western blot检测早孕绒毛组织及蜕膜组织SOCS1、SOCS2、SOCS3蛋白表达；免疫组化定位SOCS1、SOCS2、SOCS3在早孕绒毛组织、蜕膜组织表达；ELISA检测滋养细胞、蜕膜基质细胞分泌IL-10、IFN-γ。结果：正常母胎界面见SOCS1、SOCS2、SOCS3基因表达，其中SOCS3绒毛／蜕膜阳性率73．7％／71．1％；SOCS2绒毛／蜕膜阳性率50．0％／39．5％，SOCS1最少，绒毛／蜕膜阳性率34．2％／31．6％；SOCS1、SOCS2、SOCS3蛋白表达与转录水平基本一致；正常母胎界面SOCS1、SOCS2、SOCS3表达主要定位于绒毛滋养细胞和蜕膜间质；体外无血清培养滋养细胞和蜕膜基质细胞SOCS2、SOCS3低表达，SOCS1未见表达，其分泌的IL-10随时间而增高（P〈0．05）。结论：正常早孕母胎界面表达SOCS1、SOCS2、SOCS3，无刺激条件下滋养细胞和蜕膜基质细胞低表达SOCS2、SOCS3，SOCS在正常妊娠Th平衡中具有重要意义。     

KIF1B在瘦素促进妊娠早期绒毛滋养细胞MMP-2表达中的作用

 目的 观察瘦素对妊娠早期绒毛滋养细胞基质金属蛋白酶2（MMP-2）表达的影响,探讨驱动蛋白家族成员1B（KIF1B）在瘦素对MMP-2调控中的作用。方法 正常妊娠妇女人工流产绒毛组织（6~9周）,按常规分离获得滋养细胞,分为对照组、leptin（100 和500 μg/L）刺激组以及KIF1B-siRNA、leptin（100 和500 μg/L）分别+KIF1B-siRNA组,24 h后,明胶酶谱检测上清MMP-2的表达,RT-PCR检测MMP-2 mRNA、瘦素长型受体（OB-Rl）mRNA及KIF1B mRNA表达,Western blot检测KIF1B蛋白表达。结果 与对照组相比,瘦素（100 和500 μg/L）显著促进滋养细胞MMP-2表达（100 μg/L: mRNA水平由0.11±0.02增至0.18±0.05,P<0.05）;瘦素以剂量依赖方式促进OB-Rl及KIF1B表达（P<0.05）;KIF1B-siRNA部分抑制瘦素对MMP-2分泌的促进作用。结论 瘦素可能通过leptin R-KIF1B途径促进MMP-2分泌,从而促进妊娠早期滋养细胞侵袭,为阐明滋养细胞侵袭调控机制提供了新的基础数据。     

脑源性神经营养因子对细胞外蛋白水解酶激活作用的研究

 目的：研究脑源性神经营养因子 (BDNF) 对细胞外蛋白水解酶表达和激活作用的影响。 方法：体外分离并培养人脐静脉内皮细胞（HUVEC），RT-PCR法检测HUVEC基质金属蛋白酶MMP-2 、MMP-9 和基质金属蛋白酶组织抑制剂TIMP-1、TIMP-2 mRNA的表达，明胶酶谱检测MMP-2和MMP-9蛋白酶活性，纤维蛋白酶谱检测尿激酶型纤溶酶原激活剂（uPA）蛋白酶活性，Western blotting检测uPA、纤溶酶原激活剂抑制剂（PAI）、TIMP-1及TIMP-2表达。 结果：在对HUVEC增殖无明显促进作用的浓度范围内，BDNF可促进无血清培养的HUVEC MMP-2和MMP-9 mRNA表达,并可促进MMP-2和MMP-9酶原的激活产生活性明胶酶，BDNF对TIMP-1和TIMP-2的表达无明显影响。BDNF以浓度和时间依赖性方式上调HUVEC uPA和PAI-1的表达，并可促进uPA的活性。 结论：BDNF可激活MMPs和uPA/PAI相关的蛋白级联。     

The matrix metalloproteinase/tissue inhibitor of matrix metalloproteinase profile in colorectal polyp cancers

Aims:  The matrix metalloproteinase (MMP)/tissue inhibitor of metalloproteinase (TIMP) system has a major role in tumour invasion and metastasis. Roles in pathways involved in early tumour development are also being identified for this system, and the aim of this study was to define the expression profile of the major MMPs and TIMPs in colorectal polyp cancers.
Methods and results:  The expression and cellular localization of individual MMPs and TIMPs was determined in colorectal polyp cancers by immunohistochemistry. All the MMPs and TIMPs showed immunoreactivity in carcinomatous epithelium. MMP1 ( P  < 0.001), MMP2 ( P  = 0.003), MMP3 ( P  = 0.004), TIMP1 ( P  = 0.01) and TIMP2 ( P  < 0.001) showed significant increases in immunoreactivity in carcinomatous epithelium compared with adenomatous epithelium. MMP7 showed immunoreactivity in carcinomatous epithelium, but showed no immunoreactivity in either normal epithelium or adenomatous epithelium. MMP and TIMP expression was limited in normal epithelium to MMP1, MMP2 and TIMP3.
Conclusions:  This study defines the expression profile of MMPs and TIMPs in colorectal polyp cancers and shows that the increased expression of MMPs and TIMPs occurs at an early stage of colorectal neoplasia. It provides evidence to support the hypothesis that these molecules have a key involvement in the early stages of tumour development.     

Serum matrix metalloproteinase and tissue inhibitor of metalloproteinase concentrations in infertile women achieved pregnancy following IVF-ET

PROBLEM: Matrix metalloproteinase (MMP) and tissue inhibitor of metalloproteinase (TIMP) play important roles throughout various stages of pregnancy, including embryo implantation, trophoblastic invasion, placentation in early gestation, and cervical dilatation in later gestation, and feto-maternal membrane lysis. It would be beneficial if assessment of serum concentrations of MMP and TIMP could predict successful implantation following in vitro fertilization-embryo transfer (IVF-ET). This study was performed to compare serum MMP and TIMP concentrations between patients with and without the establishment of pregnancy following ET. METHOD OF STUDY: Ten patients who conceived and 10 patients who did not after IVF-ET were entered in the present study. Only intra-uterine single pregnancies with uneventful courses to term were included in the study subjects. Blood samples were obtained at 7, 14 and 21 days after oocyte retrieval. Serum concentrations of MMP-1, MMP-2, MMP-3, and TIMP-1 were measured using enzyme-linked immunosorbent assay. These variables were compared with estradiol (E(2)), progesterone (P(4)), and betahCG levels in the patients' sera. Clinical pregnancies were diagnosed only when fetal heartbeat was visualized on ultrasound. RESULTS: There were no significant differences in serum MMP concentrations between the pregnant group and the non-pregnant group. However, serum TIMP-1 concentrations on Days 14 and 21 in the pregnant group were significantly higher than those in non-pregnant group [Day 14: 223.1 +/- 11.9 versus 177.5 +/- 20.6 ng/mL (P = 0.004); Day 21: 215.4 +/- 27.8 versus 181.5 +/- 27.4 ng/mL (P = 0.03)]. Serum TIMP-1 concentrations were also correlated with serum E(2) and P(4) levels (P < 0.0001), but not with those of the MMPs. None of MMP nor TIMP-1 were correlated with serum betahCG level. CONCLUSIONS: It was demonstrated that the patients who successfully conceived after IVF-ET showed significantly higher levels of TIMP-1 at 14 and 21 days after IVF-ET, but not at day 7; further work will be required to determine if serum TIMP-1 can be used to improve prediction of pregnancy outcome in these patients.     

滋养层细胞侵入相关基因在先兆子痫胎盘中的表达

探讨与滋养层侵入有关的细胞外基质分子相关基因在先兆子痫胎盘中的表达，采用分别点样有220余种人细胞因子相关基因和人类激素相关基因cDNA片段的两款基因芯片，检测经过严格配伍的先兆子痫和正常胎盘组织的基因表达谱差异。结果显示：钙粘蛋白、胶原、整合素、选择蛋白等18种细胞外基质分子基因的表达在先兆子痫和正常胎盘组织间相差2倍以上，且全部表现为在先兆子痫胎盘中的表达增强。先兆子痫患者的胎盘组织中基质金属蛋白酶(MMP)-10、-13、-15和金属蛋白酶组织抑制因子(TIMP)-2、TIMP-3、纤溶酶原、纤溶酶原激活物等的表达均较正常者高。提示胎盘中细胞外基质分子及其降解酶基因表达异常可能与先兆子痫的病理发生关系密切。     

血红素氧合酶1修饰骨髓间充质干细胞多点注射梗死灶周围对梗死后心肌结构重塑的影响

背景：研究表明血红素氧合酶1的过表达有抗炎症反应的作用,将血红素氧合酶1修饰的骨髓间充质干细胞(HO-1-BMSCs)移植入梗死心脏周围是否可调节基质金属蛋白酶/组织金属蛋白酶抑制剂的比例而明显改善梗死心肌重构呢？ 目的：观察血红素氧合酶1修饰的骨髓间充质干细胞移植对心肌梗死后心肌胶原的调节及心肌重塑的逆转作用。 方法：利用血红素氧合酶1腺病毒转染体外培养扩增的骨髓间充质干细胞。结扎大鼠左前降支动脉制造心肌梗死模型,1 h后,分别将HO-1-BMSCs、BMSCs多点注射到大鼠心脏梗死区四周,对照组注射等量磷酸盐缓冲液。 结果与结论：Adv-hHO-1转染BMSCs后获稳定表达;hHO-1-mRNA仅在HO-1-BMSCs移植组表达;与对照组相比,HO-1-BMSCs移植组基质金属蛋白酶2/9的表达显著减少(P < 0.05),Null-BMSCs组基质金属蛋白酶2/9的表达虽然减少,但差异无显著性意义(P > 0.05);与对照组相比,细胞移植组金属蛋白酶组织抑制剂2/3的表达显著增加,尤以HO-1-BMSCs组明显(P < 0.05);但金属蛋白酶组织抑制剂1无明显变化(P > 0.05)。金属蛋白酶组织抑制剂2/基质金属蛋白酶2和金属蛋白酶组织抑制剂3/基质金属蛋白酶9的比例在细胞移植的心脏中明显上升。与对照组比较,细胞移植组心室中的胶原蛋白沉积减少,心室腔内径显著缩小。结果表明血红素氧合酶1修饰的骨髓间充质干细胞移植可使基质金属蛋白酶/组织金属蛋白酶抑制剂的比例正常化,并逆转心肌细胞外基质的重构。     

The favorable prognostic impact of tissue inhibitor of matrix metalloproteinases-1 protein overexpression in breast cancer cells

The tissue inhibitor of metalloproteinases-1 (TIMP1) inhibits tumor cell invasion and metastasis in experimental models; in addition, TIMP1 is supposed to possess another important function, cell growth promotion. The potential prognostic significance of TIMP1 in breast cancer remains unclear. We evaluated the significance of the immunohistochemical expression of TIMP1 in a well-documented series of 133 infiltrating breast carcinomas by examining any possible statistical association between this expression and numerous clinicopathological parameters as well as patients' disease-free interval. TIMP1 was generally expressed in both stromal and cancer cells in our specimens. TIMP1 was overexpressed in cancer cells of 60.15% of all cases. Tumors of high histological and nuclear grade were found to overexpress TIMP1 less frequently than the rest (p=0.003 and p=0.057, respectively). Interestingly, TIMP1 overexpression was inversely associated with cell proliferation, the latter being evidenced by Ki67 immunoreactivity (p=0.028). TIMP1 immunostaining was in parallel with metalloproteinase-2 (MMP2) immunoexpression in both cancer and stromal cells. Multivariate analysis disclosed that TIMP1 overexpression in cancer cells was an independent determining factor for prognosis (p=0.006); TIMP1 overexpression in malignant cells appeared to correlate with favorable outcome, particularly in patients with lack of nodal metastases and in patients with MMP2-negative immunophenotype (p=0.0252). The upregulation of TIMP1 cancer cell expression in breast cancer may suggest that this marker has a multifunctional role apart from that of metalloproteinase inhibitor since it was found to be related to malignant cells' differentiation and proliferation. TIMP1 overexpression in cancer cells appears for the first time to be a promising indicator of favorable prognosis in breast cancer.     

糖尿病大鼠肾组织中NF-κB和MMP-9及TIMP-1表达关系的研究

目的 :研究糖尿病大鼠肾组织中核因子 κB(NF κB)和基质金属蛋白酶 9(MMP 9)及组织基质蛋白酶抑制因子 1(TIMP 1)表达之间的关系方法 :将 3 0只雄性Wistar大鼠随机分为正常对照组 (C组 )、糖尿病未治疗组 (D组 )和糖尿病苯那普利治疗组 (B组 ) ,每组10只 ,利用链脲佐菌素 (STZ)诱导糖尿病模型 ,应用免疫组化方法研究大鼠肾组织中NF κB、MMP 9和TIMP 1的表达 ,并利用HPIAS 10 0 0型医学彩色图像分析系统进行图像分析。结果 :各组间的差异均有显著性意义 (P <0 .0 1)。NF κB与MMP 9成明显负相关 (r =-0 .882 67,P <0 .0 1) ,NF κB与TIMP 1无明显相关 (r =0 .5 2 981,P >0 .0 5 ) ,NF κB与MMP 9/TIMP 1的比值亦成明显负相关 (r =-0 .8685 0 ,P <0 .0 1)。结论 :NF κB对糖尿病大鼠肾组织中MMP 9的表达起重要作用 ,可能参与了糖尿病肾病的发生和发展     

Membrane-type-1 matrix metalloproteinase, matrix metalloproteinase 2, and tissue inhibitor of matrix proteinase 2 in prostate cancer: identification of patients with poor prognosis by immunohistochemistry

Overexpression of the matrix metalloproteinase (MMP) 2 is associated with poor prognosis in many tumor types. Membrane-type-1 MMP (MMP14) activates MMP2 using pro-MMP2 specific inhibitor, tissue inhibitor of matrix proteinase 2 (TIMP2), as a receptor. We evaluated, by immunohistochemistry on 189 T3N0-2M0 prostate cancer (Pca) cases, the influence of MMP2, MMP14, and TIMP2 expression, individually and in association, on Pca disease-free survival (DFS). We evaluated marker expression separately in cancer, stromal, and benign epithelial (BE) cells according to a percentage scale (0%, <10%, 10%-50%, and >50%). Median follow-up was 4.61 years. In BE cells, there was an inverse relationship between initial prostate-specific antigen serum level and T3 stage with MMP14 expression (P = .003) and between pN stage and TIMP2 expression (P = .04). The most significant results with survival were obtained by dichotomizing the cases between those with less than 10% and at least 10% of cells expressing the marker, the latter category representing overexpression. TIMP2 overexpression in stromal cells was associated with a longer DFS with a hazard ratio of 0.573 (P = .02) for time to recurrence. MMP2 overexpression by BE cells correlated with a shorter DFS using a multivariate trend test (hazard ratio = 1.46, P = .02). Stromal cells expressing less than 10% TIMP2 and MMP2 overexpression was the only combination that was significantly associated with a shorter DFS (log-rank test, P = .0001). This study suggests that MMP14 is involved mostly in Pca implantation and that MMP2 and TIMP2 expression by reactive stromal cells might be used as predictors of DFS in T3N0-2M0 Pca.     

黄芪多糖对颈椎病模型大鼠颈椎间盘纤维环MMP2和MMP9表达的影响

目的:探究黄芪多糖(AP)对颈椎病模型大鼠颈椎间盘纤维环中基质金属蛋白酶2(MMP2)和MMP9表达的影响。方法:建立动静力失衡性颈椎间盘退变大鼠模型,将造模成功大鼠随机分为模型组(M组)及AP低、高剂量处理组(L-AP组和H-AP组),以假手术组大鼠作为阴性对照组(NC组),另取各组大鼠颈椎间盘纤维环组织细胞进行原代细胞培养。应用HE染色和藏红O染色进行组织学分析。应用免疫组织化学染色、Western blot和RT-qPCR法检测MMP2、MMP9、金属蛋白酶组织抑制物2(TIMP2)和Ⅳ型胶原(collagenⅣ)的mRNA和蛋白表达。应用细胞-胶原黏附实验检测纤维环细胞-胶原黏附作用。结果:M组大鼠椎间盘出现退行性病变,黄芪多糖能够改善颈椎病大鼠椎间盘退行性病变。与NC组相比,M组大鼠纤维环组织中MMP2和MMP9表达水平显著增加,而TIMP2和collagenⅣ表达水平均显著降低(P 0. 05);与M组相比,L-AP组和H-AP组的MMP2和MMP9表达水平显著降低,而TIMP2和collagenⅣ的表达水平均显著增加(P 0. 05)。M组大鼠纤维环细胞-胶原黏附作用显著低于NC组(P 0. 05);与M组相比,L-AP组和H-AP组的纤维环细胞-胶原黏附作用均显著上升(P 0. 05)。与NC组相比,M组纤维环细胞中的MMP2和MMP9表达水平显著增加,而TIMP2和collagenⅣ的表达水平均显著降低(P 0. 05);与M组相比,L-AP组和H-AP组纤维环细胞中的MMP2和MMP9表达水平显著降低,而TIMP2和collagenⅣ表达水平均显著增加(P 0. 05)。结论:黄芪多糖能够抑制颈椎病模型大鼠纤维环组织中MMP2和MMP9表达,调节细胞外基质中MMPs与TIMPs的动态平衡,从而抑制MMPs对椎间盘基质中胶原的降解,在椎间盘退变的治疗中具有潜在研究价值。     

Expression of MMP2, MMP9, MT1-MMP, TIMP1, and TIMP2 mRNA in valvular lesions of the heart

Matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs) play an important role in several diseases. This study was undertaken to investigate the mRNA synthesis of MMP2, MMP9, membrane-type 1 (MT1)-MMP, and matrix metalloproteinase inhibitors TIMP1 and TIMP2 by in situ hybridization in a set of heart mitral and aortic valves operatively removed due to degenerative or inflammatory valvular diseases. The material consisted of 21 valves, eight with endocarditis and 13 with a degenerative valvular disease. The samples were studied by in situ hybridization with specific probes for MMP2, MMP9, MT1-MMP, TIMP1, and TIMP2. Synthesis of MMP2 mRNA was found in seven valves, five with endocarditis and two with degenerative valvular disease. Signals for MMP9 mRNA were found in two cases with endocarditis and five cases with degenerative valvular disease. No signal for MT1-MMP mRNA was found in the lesions. TIMP1 mRNA, on the other hand, was found in 17 cases, both endocarditis and degenerative valvular disease. TIMP2 mRNA was found in three cases of endocarditis. The signals for MMP2, MMP9, TIMP1, and TIMP2 mRNA were localized in endothelial cells and in fibroblast-like cells expressing alpha-smooth muscle actin, thus showing myofibroblast-type differentiation. The results show that matrix metalloproteinases MMP2 and MMP9, and matrix metalloproteinase inhibitors TIMP1 and TIMP2 mRNAs are synthesized in diseased valves and suggest that they may contribute to matrix remodelling in valvular disease.     

Cryptococcus neoformans pulmonary granuloma formation is associated with matrix metalloproteinase-2 expression.

The aim of this study was to investigate matrix metalloproteinase (MMP) expression during the immune response to pulmonary Cryptococcus neoformans (Cne) infection. The immune response generated in C.B-17 and C57BL/6 mice to pulmonary Cne infection has previously been characterized as type 1 and type 2, respectively, differing in the cytokines produced and leukocytes recruited during infection, influencing the extent of Cne clearance from the lung. The focus of this study was to examine changes in expression of MMP-2 and tissue inhibitor of metalloproteinase (TIMP)-2 in the lungs of Cne-infected mice during the two types (type 1 vs. type 2) of responses. C.B-17 mice that formed well-defined granulomas had elevated levels of pulmonary MMP-2 mRNA early during infection. C57BL/6 mice that had poorly defined cellular aggregates did not express detectable levels of pulmonary MMP-2 mRNA until later in the infection. Specific expression of MMP/TIMP was correlated with the type of immune response present, resolution of Cne infection and the resulting lung pathology.