子痫前期孕妇血清、胎盘组织MMP-9表达变化及其意义的研究

目的探讨孕妇血清基质金属蛋白酶-9（MMP-9）水平变化及胎盘组织中MMP-9mRNA表达变化在子痫前期发病中的作用。方法选取40例重度子痫前期孕妇,按发病时孕周不同分为早发型组（发病孕周≤34w）和晚发型组（发病孕周〉34w）各20例;另选20例正常晚期妊娠妇女为对照组。采用RT-PCR技术检测3组孕妇胎盘组织中MMP-9mRNA表达水平;采用酶联免疫吸附（ELISA）法检测3组孕妇血清MMP-9水平。结果早发型组及晚发型组孕妇血清中MMP-9水平均高于对照组,两两比较,差异均有统计学意义（P〈O．05）,且早发型组高于晚发型组（P〈0．05）。早发型组及晚发型组孕妇胎盘组织中MMP-9mRNA表达水平均低于对照组,两两比较,差异均有统计学意义（P〈0．05）,且早发型组低于晚发型组（P〈0．05）。结论子痫前期孕妇血清MMP-9水平的上升及在胎盘组织mRNA的表达下降可能通过不同途径参与子痫前期的病理生理过程,可能参与子痫前期的发病。     

基质金属蛋白酶-9及金属蛋白酶组织抑制因子-1在妊娠期高血压疾病患者胎盘组织中的表达

目的通过研究基质金属蛋白酶-9（MMP-9）及金属蛋白酶组织抑制因子-1（TIMP-1）在正常妊娠和妊娠期高血压疾病患者胎盘中的表达,探讨其与妊娠期高血压疾病发病机制的关系。方法收集山西医科大学第一医院产科和山西中医学院中西医结合医院产科住院分娩的产妇胎盘标本共142例,正常妊娠胎盘组织标本40例为对照组,妊娠期高血压疾病患者胎盘组织标本102例为病例组,通过免疫组织化学二步法,对MMP-9和TIMP-1在胎盘组织中的表达进行检测。结果1.MMP-9及TIMP-1在胎盘组织中的表达部位。在正常妊娠胎盘组织的滋养细胞、蜕膜细胞、间质细胞和血管内皮细胞胞浆中均可见MMP-9、TIMP-1的阳性表达,多为中度阳性和强阳性表达,但在妊娠期高血压疾病患者胎盘组织中,MMP-9未见间质细胞和血管内皮细胞有阳性表达,且表达者多为弱阳性。2.MMP-9在妊娠期高血压疾病患者中的阳性表达与正常妊娠组相比,差异有显著性（P〈0.05）,妊娠期高血压、子痫前期轻度、子痫前期重度组间比较差异有显著性（P〈0.05）。即妊娠期高血压疾病患者胎盘中MMP-9的表达显著低于正常妊娠,且随着妊娠期高血压疾病病情加重,MMP-9阳性表达呈明显减少趋势。3.TIMP-1在正常妊娠和妊娠期高血压疾病患者胎盘中的表达相比较,差异无显著性（P〉0.05）。结论MMP-9表达降低、MMP-9与TIMP-1的平衡状态改变可能与妊娠期高血压疾病发病有关,MMP-9及TIMP-1作为一对相互制约的因素在妊娠期高血压疾病发病中可能起重要作用,MMP-9有望成为妊娠期高血压疾病诊断及判断预后的新指标。     

红花多糖对荷瘤小鼠肿瘤组织基质金属蛋白酶-9、组织金属蛋白酶抑制剂-1mRNA表达影响的研究

目的 探讨红花多糖(safflower polysaccharide,SPS)对荷瘤小鼠肿瘤组织中基质金属蛋白酶(matrix metalloproteinases,MMP)-9、组织金属蛋白酶抑制剂1(tissue inhibitors of metalloproteinase,TIMP-1)mRNA表达的影响.方法 BABL/c小鼠腋下接种S180肉瘤,腹腔注射SPS连续10 d,给药结束24 h后取肿瘤组织Real time-PCR法测MMP-9、TIMP-1 mRNA表达水平.结果 SPS低剂量组、中剂量组和高剂量组肿瘤组织中MMP-9的表达量分别是模型对照组的0.452、0.204、0.026倍,TIMP-1的表达量分别是模型对照组的3.4、5.2、10.0倍.结论 SPS能够抑制肿瘤组织中MMP-9基因的表达,促进TIMP-1基因的表达,具有抑制肿瘤及其转移的作用.     

子痫前期患者胎盘组织TGF-β1及MMP-9 mRNA的表达及其意义

目的研究转化生长因子β1(TGF-β1)及基质金属蛋白酶9(MMP-9)mRNA在胎盘组织中的表达情况及其与子痫前期发病的关系。方法用半定量逆转录聚合酶链反应(RT-PCR)技术对10例正常妊娠组和25例子痫前期组(包括11例轻度和14例重度)胎盘组织中TGF-β1、MMP-9 mRNA的表达水平进行检测。结果与正常妊娠组相比,重度子痫前期组胎盘组织中TGF-β1、mRNA表达量增加(P<0.05),MMP-9 mRNA的表达水平显着下降(P<0.01);轻度子痫前期组胎盘组织中TGF-β1、MMP-9与正常组相比无统计学差异(P>0.05)。结论TGF-β1、MMP-9的表达在基因转录水平就已经发生改变。TGF-β1通过下调MMP-9的表达而抑制滋养层细胞的侵入,这些浸润相关基因可能在子痫前期的发病中发挥着重要的作用。     

新疆维吾尔族妊娠期高血压疾病胎盘中MMP-9、TIMP-1的表达及意义

目的探讨维吾尔族妊娠期高血压疾病(pregnancy induced hypertension,PIH)胎盘中MMP-9、TIMP-1的表达及与PIH的相关性。方法收集新疆自治区人民医院产科2009年12月～2010年8月住院分娩的维吾尔族患者胎盘组织标本90例,其中子痫前期重度组30例,子痫前期轻度组30例,正常组30例。结果 (1)胎盘组织中MMP-9与TIMP-1分布一致,主要分布在滋养叶细胞、血管内皮细胞及绒毛间质细胞的胞质中。重度组胎盘组织中MMP-9阳性颗粒分布明显减少。MMP-9在三组比较中,差异有显著性;(2)重度组与正常组、轻度组两两相比差异均有显著性,随着PIH病情的加重,MMP-9的阳性表达逐渐降低;(3)TIMP-1在各组中的表达,差异无显著性;(4)重度组MMP-9/TIMP-1阳性表达比低于正常妊娠组及轻度组,而且随着病情的加重,二者阳性表达比逐渐变小。结论 (1)PIH患者胎盘组织中MMP-9的阳性表达水平随着PIH病情加重,明显减少;(2)PIH患者胎盘组织中TIMP-1在各组中变化不大,与PIH病情无明显相关性.     

RECK、基质金属蛋白酶-9和血管内皮生长因子在子痫前期患者胎盘组织中的表达

目的检测子痫前期患者胎盘组织中RECK、基质金属蛋白酶-9(MMP-9)、血管内皮生长因子(VEGF)的基因表达,探讨它们与胎盘滋养细胞浸润过程的调控关系。方法采用RT-PCR、Western blotting、免疫组织化学检测120例妊娠足月剖宫产(正常妊娠、轻度子痫前期、中度子痫前期、重度子痫前期各30例)胎盘组织中RECK、MMP-9、VEGF的基因表达。结果 3组子痫前期患者胎盘组织中MMP-9及VEGF的mRNA表达水平均显著低于正常妊娠组(P0.05);重度子痫前期组中RECK mRNA的表达显著高于正常妊娠组(P0.05);3组子痫前期患者胎盘组织中MMP-9及VEGF蛋白表达均显著低于正常妊娠组(P0.05),中度和重度子痫前期组中RECK蛋白表达显著高于正常妊娠组(P0.05)。结论子痫前期患者胎盘中RECK与MMP-9、VEGF之间存在负相关性,它们可能参与了胎盘滋养细胞浅浸润过程的调控。     

MMP-9和TIMP-1在高血压合并糖尿病周围神经病大鼠坐骨神经的表达

目的探讨高血压(HTN)合并糖尿病周围神经病(DPN)大鼠模型坐骨神经中基质金属蛋白酶-9(MMP-9)和组织金属蛋白酶抑制剂-1(TIMP-1)的表达。方法实验大鼠分为正常组、HTN组、DPN组和DPN+HTN组。造模后4w检测各组血糖、血压及坐骨神经传导速度,RT-PCR检测坐骨神经MMP-9mRNA和TIMP-1mRNA表达。结果与正常组和HTN组比较,DPN组和HTN+DPN组血糖显著增高,神经传导速度显著降低(0.01),坐骨神经MMP-9mRNA和TIMP-1mRNA表达显著上调(0.01)。与DPN组比较,HTN+DPN组血压显著增高,神经传导速度显著降低,坐骨神经MMP-9mRNA表达较DPN组上调,TIMP-1 mRNA表达显著下降(0.01)。。结论高血压合并糖尿病周围神经病坐骨神经MMP-9mRNA表达上调,TIMP-1mRNA表达下调,可能与抑制施万细胞和髓鞘形成加剧周围神经损伤相关。     

MMP-9/TIMP -1在子宫内膜细胞中的多因素调节

目的通过体外实验研究E2、MPA、HB-EGF对Ishikawa细胞中MMP-9/TIMP-1 mRNA表达的调节,探讨其在胚胎种植中的意义.方法体外培养Ishikawa细胞,分别加入E2、MPA、E2 MPA、E2 MPA RU486、HB-EGF刺激48h后,采用原位杂交、RT-PCR测定各种条件下MMP-9、TIMP-1 mRNA的表达.结果雌、孕激素单独或联合作用均可以显著降低TIMP-1 mRNA的表达(P<0.05),同时加RU486后TIMP-1 mRNA的下降趋势减弱.相反HB-EGF 使TIMP-1 mRNA的表达增高(P<0.05).Ishikawa细胞中MMP-9 mRNA均没有阳性表达.结论 (1)雌、孕激素对TIMP-1 mRNA具有下调作用,RU486可以抑制孕激素的作用.(2)HB-EGF对TIMP-1 mRNA的表达具有上调作用.(3)MMP-9 mRNA在Ishikawa细胞中没有表达.     

氧化型胆固醇下调血管平滑肌细胞金属蛋白酶组织抑制剂基因表达

目的:研究氧化型胆固醇对血管平滑肌细胞MMP-9及TIMP-1表达的影响。方法:离体培养兔主动脉血管平滑肌细胞,分别用胆固醇、Triol与25-OH负载细胞,狭缝杂交测定TIMP-1mRNA表达,细胞免疫化学测定MMP-9与TIMP-1蛋白表达。结果:Triol与25-OH(1 mg/L,24 h)抑制TIMP-1 mRNA及蛋白表达,对MMP-9蛋白表达无影响。结论:氧化型胆固醇可以下调血管平滑肌细胞TIMP-1基因表达。     

基质金属蛋白酶-9和血管内皮生长因子在子痫前期患者胎盘组织中的表达

目的 检测子痫前期患者胎盘组织中RECK、基质金属蛋白酶-9（MMP-9）、血管内皮生长因子（VEGF）的基因表达,探讨它们与胎盘滋养细胞浸润过程的调控关系。 方法 采用RT-PCR、Western blotting、免疫组织化学检测120例妊娠足月剖宫产（正常妊娠、轻度子痫前期、中度子痫前期、重度子痫前期各30例）胎盘组织中RECK、MMP-9、VEGF的基因表达。结果 3组子痫前期患者胎盘组织中MMP-9及VEGF的mRNA表达水平均显著低于正常妊娠组（P<0.05）;重度子痫前期组中RECK mRNA的表达显著高于正常妊娠组（P<0.05）;3组子痫前期患者胎盘组织中MMP-9及VEGF蛋白表达均显著低于正常妊娠组（P<0.05）,中度和重度子痫前期组中RECK蛋白表达显著高于正常妊娠组（P<0.05）。结论 子痫前期患者胎盘中RECK与MMP-9、VEGF之间存在负相关性,它们可能参与了胎盘滋养细胞浅浸润过程的调控。     

Distribution patterns of matrix metalloproteinase (MMP)-2 and -9 and their inhibitors (TIMP-1 and TIMP-2) in the human decidua during early pregnancy

Early human trophoblast shows dramatic invasive properties during early pregnancy. A tightly-regulated activation of matrix metalloproteinases (MMPs) is considered to be of critical importance for the control of trophoblast invasion. The aim of the present study was to determine MMP-2, MMP-9, TIMP-1 and TIMP-2 protein expression in decidual endometrium during the first trimester of pregnancy (22-42 days post coitus) with special attention to their expression patterns in endometrial compartments. Cytokeratin staining applied to adjacent sections was used to identify epithelial and trophoblast cells. We observed that MMP-2, particularly in the fourth week, appeared to be expressed more strongly in extravillous trophoblasts (EVTs) and vascular endothelial cells in the first trimester of pregnancy. Therefore, MMP-2 is likely to be the primary mediator in invasion of the trophoblast into the decidual endometrium, as well as in vascular remodeling and angiogenesis in the first trimester of pregnancy. The high expression of TIMP-1 and TIMP-2 in EVTs and glandular epithelium suggests that a restricted and balanced expression of these molecules is important for matrix remodeling and controlled trophoblast invasion during placentation. We conclude that (1) MMP-2 and MMP-9 and their inhibitors TIMP-1, and TIMP-2 determine the invasive behavior of trophoblast into the endometrium, and in particular, (2) MMP-2 may be the key regulator of trophoblast invasion in early human pregnancy.     

蜕膜组织MMP-9/TIMP-3水平与自然流产关系

目的研究蜕膜组织中MMP-9／TIMP-3之间的平衡与自然流产发生的关系。方法用免疫组化S-P法测定30例自然流产患者与20例正常妊娠者蜕膜组织中MMP-9／TIMP-3的表达。结果研究组蜕膜细胞MMP-9表达阳性率为76．7％，高于对照组(55．0％，P-0．02)，两组蜕膜细胞TIMP-3的表达差异无显著性。结论自然流产患者蜕膜组织中MMP-9的表达增高，TIMP-3表达正常所导致的MMP-9／TIMP-3比例升高，在自然流产的发生中起重要作用。     

Secretion of matrix metalloproteinase-2, matrix metalloproteinase-9 and tissue inhibitor of metalloproteinases into the intrauterine compartments during early pregnancy.

Matrix metalloproteinases (MMPs) are important enzymes in tissue remodelling, a key event for the development of the fetal membranes and placenta and establishing the feto-maternal interface during early pregnancy. This study has examined the secretion of the gelatinases, MMP-2 (72 kDa) and MMP-9 (92 kDa), and the endogenous tissue inhibitors of metalloproteinases (TIMPs) into extra-embryonic coelomic and amniotic fluids, the two principal intra-uterine compartments of the first trimester, and compared them to amniotic fluid collected later in gestation. In extra-embryonic coelomic fluid, gelatin zymography demonstrated that MMP-2 (72 kDa) was the predominant gelatinase, with some MMP-9 present. A broad range of TIMPs corresponding to TIMP-1 and TIMP-2, glycosylated and unglycosylated TIMP-3 and TIMP-4 was detected in this compartment by reverse zymography and immunoblot analyses. There was little gelatinase or TIMP activity in amniotic fluid in the first trimester. In amniotic fluid from the second trimester after fusion of the membranes obliterating the extra-embryonic coelom, and at term elective caesarean section, MMP-2 is the predominant gelatinase present, with a broad spectrum of TIMPs. These findings demonstrate that predominantly MMP-2 and also MMP-9, regulated by a range of TIMPs, are involved in intra-uterine tissue remodelling during the establishment of pregnancy.     

基质金属蛋白酶-2、3及其组织抑制剂TIMP-1在子宫内膜异位症中的表达

目的探讨基质金属蛋白酶(MMP-2、MMP-3)及其抑制剂(TIMP-1)在子宫内膜异位症发生及发展中的作用.方法采用免疫组化SP法分别测定MMP-2、MMP-3 、TIMP-1在卵巢子宫内膜异位症异位内膜60例(A组),子宫腺肌症异位内膜40例(B组),子宫肌瘤子宫内膜30例(对照组C)的表达强度.结果 A、B组中MMP-2、MMP-3的表达强度明显高于对照组(P<0.05)而TIMP-1的表达明显低于对照组(P<0.05);A、B组间MMP-2、MMP-3 、TIMP-1 的表达无明显差异(P>0.05).结论在子宫内膜异位症中MMP-2、MMP-3的过度表达及TIMP-1的低表达可能与内异症的发生与发展有关.     

基质金属蛋白酶-9及其组织抑制物-1与颈动脉粥样斑块稳定性相关研究

目的: 探讨基质金属蛋白酶-9（MMP-9）、基质金属蛋白酶抑制剂-1（TIMP-1）、MMP-9/TIMP-1与脑梗死患者颈动脉粥样斑块稳定性的相关性。方法: 80例动脉粥样硬化性脑梗死患者按TCD微栓子检测结果分为微栓子阴性组70例和微栓子阳性组10例，20例正常人作为对照组，分别测定血浆MMP-9、TIMP-1水平。结果: 脑梗死患者血浆MMP-9、TIMP-1水平明显高于正常对照组(P<0.01)，相关性分析发现MMP-9水平与TIMP-1水平呈正相关（r=0.76，P<0.01）。MMP-9/TIMP-1比值仅在微栓子阳性组明显增高。结论: 血浆MMP-9参与了脑梗死的病理生理过程，血浆MMP-9和MMP-9/TIMP-1与颈动脉粥样斑块的不稳定性呈正相关。     

Imbalance between matrix metalloproteinase-9 and tissue inhibitor of metalloproteinase-1 in toluene diisocyanate-induced asthma

BACKGROUND: Toluene diisocyanate (TDI)-induced asthma is an inflammatory disease of the airways characterized by airway remodelling due, at least in part, to an excess of extracellular matrix deposition in the airway wall. The ratio of matrix metalloproteinase-9 (MMP-9) and its inhibitor, tissue inhibitor of metalloproteinase-1 (TIMP-1) may be a marker of the balance between airway tissue destruction and repair. OBJECTIVE: We determined whether an imbalance of the MMP-9 : TIMP-1 molar ratio is present before and/or after challenge with TDI. METHODS: We used a murine model of TDI-induced asthma to evaluate the MMP-9 and TIMP-1 balance in the lung. RESULTS : The expression of MMP-9 and TIMP-1 mRNAs and proteins in the lungs increased at 7 h after TDI inhalation and continued for up to 72 h. Immunohistochemical and immunocytological analyses in the lungs of TDI-exposed mice revealed increases of immunoreactive MMP-9 and TIMP-1. There were significant correlations between the levels of MMP-9 or TIMP-1 and the number of neutrophils, lymphocytes, or eosinophils. The molar ratio of MMP-9/TIMP-1 significantly decreased at 7 h after TDI inhalation and continued up to 72 h. CONCLUSION: These data suggest that TDI-induced asthma may be associated with an imbalance between MMP-9 and TIMP-1, which could be useful as a marker of airway inflammation and airway remodelling in this disease.     

高氧、维甲酸对早产大鼠肺成纤维细胞MMP-2及TIMP-2表达的调控

目的:探讨维甲酸（RA）对高氧暴露下早产大鼠肺成纤维细胞（LFs）基质金属蛋白酶-2（MMP-2）及其特异性组织抑制物-2（TIMP-2）表达的影响。方法:建立原代培养的早产大鼠LFs高氧暴露模型,采用半定量RT-PCR方法检测MMP-2和TIMP-2 mRNA表达,明胶酶谱法检测MMP-2酶原和活酶表达, Western blotting检测其磷酸化和总的ERK1/2、JNK1/2、p38和c-Jun表达。结果:（1）与对照组比较,高氧可促进早产大鼠LFs MMP-2 mRNA及其酶原和活酶表达（P<0.05,P<0.01）,同时使其p-ERK1/2、p-JNK1/2、p-p38和p-c-Jun表达水平显著提高（P<0.01,P<0.05）;（2）RA能不同程度下调高氧诱导的早产大鼠LFs MMP-2 mRNA高表达和明显降低其p-JNK1/2、 p-p38和p-c-Jun表达（P<0.01,P<0.05）,但进一步提高p-ERK1/2表达;（3）高氧、RA对TIMP-2 mRNA和总ERK1/2、JNK1/2 、p38及c-Jun表达无明显影响。结论:高氧暴露通过激活MAPKs信号转导通路（主要是JNK和p38）使c-Jun磷酸化水平提高,促进MMP-2表达和激活;RA通过抑制JNK和p38磷酸化,下调MMP-2表达与活化,从而拮抗高氧诱导的肺损伤。     

Increased matrix metalloproteinase-9 with elastolysis in nocturnal asthma.

BACKGROUND: Matrix metalloproteinase-9 (MMP-9) is capable of degrading elastin, whereas tissue inhibitor of metalloproteinase-1 (TIMP-1) can inhibit MMP-9 activity. We observed reduced airway tissue elastin volume density in six subjects with nocturnal asthma (NA) as compared with seven subjects with nonnocturnal asthma (NNA) and seven normal controls (NL) when endobronchial biopsies were evaluated morphometrically at 4:00 PM and 4:00 AM. OBJECTIVE: We hypothesized that increased metalloproteinases and decreased tissue inhibitors of metalloproteinases in the airways of subjects with NA may be responsible for reduced elastin volume density. METHODS: Ten additional subjects with NA, 10 subjects with NNA, and 7 normal control subjects underwent bronchoscopy with bronchoalveolar lavage at 4:00 PM and 4:00 AM. Levels of MMP-2, MMP-9, TIMP-1, and TIMP-2 were determined in bronchoalveolar lavage by enzyme-linked immunosorbent assay. RESULTS: There was a fourfold circadian increase in bronchoalveolar lavage levels of MMP-9, and there was a twofold increase in MMP-9:TIMP-1 ratio in NA subjects from 4:00 PM to 4:00 AM. There were no circadian changes in the NNA and NL subjects. At 4:00 AM, MMP-9 levels and the MMP-9:TIMP-1 ratio were highest in NA subjects. At 4:00 PM, no significant group differences were observed. The MMP-9 levels positively correlated with the overnight fall in forced expiratory volume in 1 second and the MMP-9/TIMP-1 ratio negatively correlated with the 4:00 AM % predicted forced expiratory volume in 1 second. CONCLUSIONS: Our results from these two pilot studies suggest that increased MMP-9 and decreased TIMP-1 at night in NA may lead to reduced elastin density.