缺血性脑血管病患者颈动脉粥样硬化斑块类型与血清MMP-8、TIMP-1表达的相关性研究

目的:探讨缺血性脑血管病患者颈动脉粥样硬化斑块的类型与血清基质金属蛋白酶-8(MMP-8)及其抑制剂TIMP-1的关系.方法:选择191例缺血性脑血管病患者及50例健康查体者,所有研究对象均行颈动脉彩色多普勒超声检查,并采用ELISA法检测血清MMP_8、TIMP-1的水平.结果:脑梗死、腔隙性脑梗死及短暂性脑缺血发作...     

冠状动脉狭窄与扩张患者的血浆NO、ET-1、MMP-9及TIMP-1水平变化

目的 探讨一氧化氮（NO）、内皮素-1(ET-1)、基质金属蛋白酶-9(MMP-9)和组织基质金属蛋白酶抑制物-1(TIMP-1)在冠状动脉损伤中可能参与机制。方法 选择我院行冠脉造影的患者,分为冠脉扩张组25例（单纯冠脉扩张7例;冠脉扩张合并少量斑块18例）,冠脉粥样硬化组38例,冠脉正常组32例（冠脉完全正常14例;冠脉有少量斑块18例）。用ELISA法检测血浆NO、ET-1、MMP-9及TIMP-1水平。结果 NO、NO/ET-1、MMP-9、MMP-9/TIMP1在冠脉扩张、粥样硬化及正常组间存在显著差异（P<0.05）。进一步分亚组分析,单纯冠脉扩张组NO水平达到最高分泌峰值[（168±121） mmol/L],冠脉扩张合并少量斑块组MMP-9水平达到分泌最高值[（1977±1090） ng/L],ET-1和TIMP-1水平并没有产生统计学差异。结论 冠脉扩张可能是抵抗动脉粥样硬化发生而启动的机体正常代偿功能,而冠脉动脉粥样硬化是机体正常代偿功能的失去所导致的血管损伤。     

ACS患者动脉粥样斑块稳定性相关细胞因子变化的临床意义

目的：探讨急性冠脉综合征（ACS）病人血清中的细胞因子基质金属蛋白酶-1（MMP-1）、金属蛋白酶组织抑制剂-1（TIMP1）、sICAM-1、sVCAM-1水平与冠状动脉粥样硬化斑块稳定性的相关性及临床意义。方法：用ELISA检测ACS病人血清中sICAM-1、sVCAM-1、MMP-1、TIMP-1水平,并与正常对照组进行比较分析。结果：ACS组血清sICAM-1、sVCAM-1、MMP-1、TIMP-1水平均非常明显地高于正常对照组（P〈0.01）。结论：外周血中sICAM-1、sVCAM-1、MMP-1、TIMP-1水平增高与ACS相关,能反映冠脉粥样硬化斑块的稳定情况,可作为评价冠状动脉粥样硬化斑块稳定性与病变严重程度的一个参考指标。     

哮喘患者血浆IL-13、LTB-4、MMP-9、TIMP-1变化及临床意义

目的：探讨哮喘患者血浆IL-13、白三烯B4（LTB-4）、基质金属蛋白酶9（MMP-9）和基质金属蛋白酶组织抑制剂1（TIMP-1）变化及临床意义。方法：选择哮喘患者及查体健康者（对照组）各30例,检测哮喘组急性发作期及稳定期的血浆IL-13、LTB-4、TIMP-1及TIMP-1/MMP-9比值,且与对照组比较;并对哮喘组各检测指标进行相关性分析。结果：哮喘组急性发作期血浆IL-13、LTB-4、MMP-9、TIMP-1及MMP-9/TIMP-1比值明显高于稳定期（P均〈0.05）,上述指标均明显高于对照组（P均〈0.01）;IL-13与LTB-4、MMP-9与TIMP-1、MMP-9、TIMP-1与TIMP-1/MMP-9比值均呈显著正相关（r分别为0.841、0.832、0.921、0.579,P均〈0.05）。结论：IL-13、LTB-4升高及MMP-9/TIMP-1失衡参与哮喘发病,检测IL-13、LTB-4、MMP-9、TIMP-1、TIMP-1/MMP-9比值可评估哮喘病情,指导治疗。     

血浆sES、MMP-9和TIMP-1与冠状动脉扩张的关系

目的 探讨炎症因子可溶性E选择素(sES)、基质金属蛋白酶-9(MMP9)、基质金属蛋白酶抑制物-1(TIMP-1)与冠脉扩张的关系及其临床意义.方法 选择我院行冠脉造影的部分患者,根据冠造结果分三组,其中Ⅰ组为冠状动脉扩张,共11例;冠状动脉粥样硬化为Ⅱ组,共35例;造影正常者为Ⅲ组,共24例.用ELISA法检测血浆MMP-9及其抑制物TIMP1水平.结果 sES及MMP-9水平在冠脉扩张组明显高于冠脉粥样硬化组及冠脉造影正常组(P＜0.05).血浆TIMP1水平在三组中相近.结论 sES、MMP-9/TIMP-1与冠脉扩张相关,它们可能参与了冠脉扩张的发生,在冠脉疾病的进展中起重要作用.     

罗格列酮对DM2患者血清MMP-9和TIMP-1影响的研究

目的:探讨2型糖尿病(DM2)患者血清基质金属蛋白酶-9(MMP-9)和组织抑制因子1(TIMP-1)的变化,以及罗格列酮治疗对其的影响。方法:临床观察采用随机对照方法,选择100例初诊DM2患者和50例正常人对照。将100例DM2患者分为A组和B组,A组常规降糖治疗,B组在常规治疗基础上加服罗格列酮,16周后测定患者治疗前后血清MMP-9及TIMP-1水平。结果:DM2患者血清MMP-9、TIMP-1及MMP-9/TIMP-1水平较正常对照组显著升高(P<0.01);B组治疗前后血清MMP-9、TIMP-1及MMP-9/TIMP-1显著降低(P<0.01),A组治疗前后血清MMP-9、TIMP-1及MMP-9/TIMP-1差异无统计学意义(P>0.05);且MMP-9与TIMP-1之间,MMP-9/TIMP-1与MMP-9、TIMP-1之间均呈正相关。结论:血清MMP-9与TIMP-1可能与DM2发生、发展有关,罗格列酮能显著降低DM2患者MMP-9与TIMP-1水平,纠正MMP-9/TIMP-1比值,以期达到早期诊治,防止DM2大血管病变的目的。     

兔颈动脉粥样硬化斑块内MMP-2与新生血管关系的研究

目的探讨兔颈动脉粥样硬化模型斑块内基质金属蛋白酶-2(matrix metaloproteinase-2,MMP-2)与新生血管的关系。方法将40只健康雄性新西兰大白兔随机分为4组,A组予普通饲料喂养28 d、B组予高脂饮食28 d、C组予硅橡胶圈干预联合高脂饮食14 d、D组予硅橡胶圈干预联合高脂饮食28 d。利用超声造影检测C组、D组兔颈动脉粥样硬化模型斑块内新生血管情况,应用免疫组化检测斑块内MMP-2、血小板内皮细胞黏附分子-1(cluster of differentiation 31,CD31)的表达,进行两者间相关性分析。结果超声造影检测到C组、D组模型兔颈动脉斑块内有新生血管形成,两组间差异有统计学意义(P<0.05)。免疫组化结果显示斑块内有阳性表达的MMP-2、CD31,两者之间呈正相关(P<0.01)。结论 MMP-2在兔颈动脉粥样硬化斑块内新生血管的生成中发挥一定作用。     

脑梗死患者间歇使用低分子肝素对颈动脉斑块和血清炎性标志物的影响

目的:脑梗死患者间断使用低分子肝素,观察其对颈动脉斑块和血清炎性标志物的影响.方法:选择脑梗死并具有颈动脉斑块的患者78例作为对象,随机分为常规组(37例)和低分子肝素组(41例),分别于治疗前后测定颈动脉斑块情况及血清高敏C反应蛋白(hs-CRP)、基质金属蛋白酶-9(MMP-9)水平.结果:①治疗前比较,两组间颈动...     

急性冠状动脉综合征患者血浆基质金属蛋白酶及其抑制因子的变化

目的：研究急性冠状动脉综合征患者血浆基质金属蛋白酶（MMP-9）及其抑制因子（TIMP-1）的变化。方法：采用夹心酶免疫定量分析技术，测定30例急性冠状动脉综合征患者、29例稳定型心绞痛患者和17例正常对照血浆MMP-9和TIMP-1的变化。结果：3组间年龄、性别、总胆固醇、甘油三脂、高密度脂蛋白胆固醇和低密度脂蛋白胆固醇无显著差异。急性冠脉综合征组高敏C反应蛋白(4.336±1.334) mg/L、MMP-9 (13.145±9.796) μg/L、TIMP-1 (1.363±0.605) μg/L、MMP-9/TIMP-1 (10.013±7.195) 显著高于稳定型心绞痛组[ 分别为(2.205±0.458) mg/L、(2.206±1.996) μg/L、(0.688±0.389) μg/L和(3.249±1.987) ]和正常对照组[ 分别为(1.625±0.434) mg/L、(1.663±1.271) μg/L、(0.583±0.421) μg/L和(5.169±7.416) ]，MMP-9与hs-CRP、TIMP-1、MMP-9/TIMP-1呈正相关。结论：急性冠脉综合征患者存在着由炎症反应导致的以MMP-9升高为主的MMP-9/TIMP-1失衡状态，血浆MMP-9/TIMP-1有可能作为反映急性冠脉综合征患者脆性斑块的指标。     

急性脑梗死患者颈动脉粥样硬化斑块形成与血清脂蛋白a、MMP-9、D-D水平相关研究

目的 分析急性脑梗死患者颈动脉粥样硬化斑块形成与血清脂蛋白a、MMP-9、D-D水平的相关性.方法 选择2019年1月至2020年12月间收治的150例急性脑梗死患者作为观察组,100例脑梗死但未见颈动脉粥样硬化斑块患者作为对照组;入组后检测患者血糖、血脂、脂蛋白a、MMP-9及D-D水平.结果 观察组血糖、TG、TC、HDL及LDL水平均明显高于对照组,且差异具有统计学意义(P<0.05);观察组脂蛋白a、MMP-9及D-D水平均明显高于对照组,且差异具有统计学意义(P<0.05);脂蛋白a、MMP-9及D-D三指标均呈现明显的两两线性相关关系,且具有统计学意义(P<0.05);脂蛋白a、MMP-9及D-D水平与颈动脉粥样硬化斑块形成呈显著正相关关系,且具有统计学意义(P<0.01);脂蛋白a、MMP-9及D-D水平是影响颈动脉粥样硬化斑块形成的独立性危险因素(P<0.05).结论 急性脑梗死患者颈动脉粥样硬化斑块形成与血清脂蛋白a、MMP-9、D-D水平呈显著性正相关关系.     

糖尿病合并脑梗死患者颈动脉斑块及甲襞微循环观察

目的:观察2型糖尿病合并脑梗死(DMCI)患者颈动脉斑块及甲襞微循环变化。方法:将110例脑梗死患者分为DMCI组(n=40)和非糖尿病脑梗死组(NDMCI组,n=70),并设健康体检对照组(CON组,n=60)。采用彩色多普勒超声诊断仪测量各组双侧颈动脉内膜增厚及斑块形成;采用微循环检测系统观测各组甲襞微循环(NFM)形态、流态和袢周状态,并运用加权积分法分析比较各组分值和相关指标的变化。结果:DMCI组颈动脉内膜增厚者为15.00%,与NDMCI组的15.71%比较无明显差异,P>0.05;DMCI组颈动脉斑块占67.50%,显著高于ND-MCI组的54.29%,P<0.01。DMCI组NFM形态和袢周状态积分值与NDMCI组比较无显著差异,P>0.05;但DMCI组NFM流态积分值(2.16±0.70)明显高于NDMCI组(1.16±0.66),P<0.01;主要表现在DMCI组微血流呈粒缓流和/或粒摆流,甚至停滞,同时白色微小血栓(白微栓)数量及红细胞重度聚集和微血管渗出、出血均比NDMCI组严重,P<0.05。结论:2型糖尿病可明显增加脑梗死患者颈动脉斑块和微循环障碍。     

IL-19及其受体与慢性鼻-鼻窦炎组织重塑的相关性研究

目的:探讨白细胞介素19(interleukin-19,IL-19)及其受体(IL-20R1/IL-20R2)在不同类型慢性鼻-鼻窦炎[慢性鼻-鼻窦炎伴鼻息肉(chronic rhinosinusitis with nasal polyps,CRSw NP)和慢性鼻-鼻窦炎不伴鼻息肉(chronic rhinosinusitis without nasal polyps,CRSs NP)]患者中表达的差异,并分析其与慢性鼻-鼻窦炎组织重塑的相关性。方法:研究共分3组:CRSw NP组(30例)、CRSs NP组(15例)和对照组(鼻中隔偏曲患者15例)。实时荧光定量PCR检测IL-19及其受体(IL-20R1/IL-20R2)和组织重塑因子基质金属蛋白酶(MMP)-2、MMP-9、金属蛋白酶组织抑制物(TIMP)-1的mRNA相对表达量;免疫组化检测IL-19及其受体的蛋白表达量;ELISA检测MMP-9、TIMP-1的蛋白表达量。结果:CRSw NP组IL-19、IL-20R1、IL-20R2和MMP-9的mRNA和蛋白表达量高于CRSs NP组和对照组(P0.05),CRSs NP组TIMP-1的mRNA和蛋白的表达量均高于CRSw NP组和对照组(P0.05);MMP-2的mRNA和蛋白的表达量在各组无显著差异。CRSw NP组IL-19、IL-20R1和IL-20R2均与MMP-9的mRNA相对表达量呈正相关(P0.05);IL-19及其受体与TIMP-1的mRNA相对表达量无明显相关。结论:IL-19及其受体的mRNA在CRSw NP中高表达,且与MMP-9 mRNA表达呈正相关,提示二者可能存在交互作用,可能参与慢性鼻-鼻窦炎的组织重塑。     

Coexpression of cyclooxygenase-2 and matrix metalloproteinases in human aortic atherosclerotic lesions

Inflammation appears to have a major role in the development of atherosclerosis. Cyclooxygenase-2 (COX-2) is involved in the inflammatory response via the generation of prostanoids that, in turn, are involved in the production of matrix metalloproteinases (MMPs). This study aimed to investigate atherosclerosis in human aortas for in situ tissue distribution of COX-2, MMPs including MMP-9 and membrane type 1 MMP (MT1-MMP), and tissue inhibitor of metalloproteinase-2 (TIMP-2). Immunohistochemical studies were performed on atherosclerotic lesions of aortas from patients with aortic aneurysms (n = 4) and dissections (n = 3) by using antibodies to COX-2, MMP-9, MT1-MMP, and TIMP-2. Control tissues were obtained from traumatically dissected aortas (n = 2). All specimens from diseased aortas had atherosclerotic lesions ranging from fatty streak to atheromatous plaques. In control, there was no expression of COX-2, MMP-9, and MT1-MMP in all aortic layers. Immunoreactivity for COX-2 was predominantly noted in macrophages and smooth muscle cells (SMCs) of the intima including atherosclerotic plaque itself and the medial layer of the plaque base, as well as in SMCs and endothelial lining of the vasa vasorum in the adventitia. Immunoreactivity for MMP-9 and MT1-MMP was found in the same distribution as that of COX-2. Additionally, the expression of TIMP-2 increased in relation to MMP-9 expression. This study demonstrates that COX-2 is coexpressed with MMP-9 and MT1-MMP, not only by macrophages and SMCs in atherosclerotic lesions, but also in endothelial lining of the vasa vasorum of human aortas. Thus, vascular inflammatory reactions may influence extracellular matrix remodeling by coactivation of MMPs in the development of atherosclerosis and, in turn, the progression of disease.     

彩超对脑梗死患者颈动脉斑块的研究及临床价值分析

目的:探究彩超对脑梗死患者颈动脉斑块的研究及临床价值.方法:将157例脑梗死患者作为脑梗死组,分别进行CT血管造影检查(CT脑梗组)和彩超检查(彩超脑梗组);另纳入157例健康受试者为非脑梗死组,也分别进行CT血管造影检查(CT对照组)和彩超检查(彩超对照组).比较四组颈动脉斑块诊断的准确性及影像资料图质量.结果:CT...     

Quantitative differences in matrix metalloproteinase (MMP)-2, but not in MMP-9, tissue inhibitor of metalloproteinase (TIMP)-1 or TIMP-2, in seminal plasma of normozoospermic and azoospermic patients

BACKGROUND: Matrix metalloproteinases (MMPs) and their inhibitors, tissue inhibitors of metalloproteinases (TIMPs), have been detected in reproductive tissues and seminal plasma. The purpose of this study was to quantify MMP-2, MMP-9, TIMP-1 and TIMP-2 in human seminal plasma and to evaluate their association with sperm. METHODS: Seminal plasma was analysed using ELISA assays for all four analytes in 12 normozoospermic and 12 azoospermic patients and then for MMP-2 only in another 114 men with azoospermia (n = 16), after vasectomy (n = 20) and with sperm counts within the following ranges: 0.3-19 x 10(6)/ml (n = 20), 20-23 x 10(6)/ml (n = 11), 49-57 x 10(6)/ml (n = 12), 96-110 x 10(6)/ml (n = 12), 139-161 x 10(6)/ml (n = 12) and 215-346 x 10(6)/ml (n = 11). Additional zymographic analyses using SDS-PAGE were performed. RESULTS: All investigated MMPs and TIMPs were detected. MMP-9, TIMP-1 and TIMP-2 were not significantly different in normozoospermia and azoospermia. Only the MMP-2 concentration was significantly decreased in azoospermic compared with normozoospermic patients (mean +/- SD: 650.6 +/- 288.9 versus 1677 +/- 910.4 ng/ml respectively; P = 0.0002) and significantly correlated with the number of sperm (r = 0.54; P < 0.0001). CONCLUSION: MMP-2 in seminal plasma was strongly correlated to the sperm count in a linear fashion. Its origin and potential function remain to be elucidated.     

Age-related changes in plaque composition: a study in patients suffering from carotid artery stenosis.

OBJECTIVE: The extent of atherosclerotic plaque burden and the incidence of atherosclerosis-related cardiovascular events accelerate with increasing age. The composition of the plaque is associated with plaque thrombosis and acute coronary occlusion. Surprisingly, however, the relation between advancing age and atherosclerotic plaque composition is still unclear. In the present study, we investigated the association between plaque characteristics and advancing age in a population of patients with haemodynamically significant carotid artery stenosis. METHODS: Patients (N=383), ages 39-89 years, underwent carotid endarterectomy (CEA). Morphometric analysis was performed on the dissected atherosclerotic plaques to study the prevalence of fibrous and atheromatous plaques. Picro sirius red, haematoxylin eosin, alfa actin and CD68 stainings were performed to investigate the extent of collagen, calcification, smooth muscle cells and macrophages in carotid plaques, respectively. The presence of metalloproteinases-2 and -9 was assessed by ELISA. RESULTS: With aging, a decrease in fibrous plaques and an increase in atheromatous plaques were observed. This was accompanied by an age-associated decrease in smooth muscle cell content in carotid plaques. Macrophage content slightly increased with age. In addition, total matrix metalloprotease (MMP)-2 was negatively and MMP-9 positively related with age. Differences in plaque phenotype were most prominent for the youngest age quartile compared with older age quartiles. CONCLUSIONS: With increasing age, the morphology of atherosclerotic plaques from patients with carotid artery stenosis changes. Plaques become more atheromatous and contain less smooth muscle cells with increasing age. Local inflammation and MMP-9 levels slightly increased with age in plaques obtained from patients suffering from haemodynamically significant advanced atherosclerotic lesions.     

缬沙坦对阿霉素心肌病大鼠的心脏保护作用及机制研究

目的： 探讨AT1受体阻滞剂缬沙坦对阿霉素心肌病(ADR-DCM)大鼠的心脏保护作用及其机制。方法: 雄性Wistar大鼠分3组：(1)阿霉素心肌病组(ADR-DCM，n=25)，阿霉素 2.5 mg/kg，尾静脉注射，每周1次，连续10周；(2)阿霉素心肌病+缬沙坦治疗组(ARB，n=10)， 缬沙坦 30 mg/kg，每天1次，灌胃治疗；(3)正常对照组(CON，n=10)。12周时进行超声和血流动力学检测，氯胺T法检测羟脯氨酸及胶原含量， Western印迹分析检测MMP-2、MMP-9及TIMP-1的表达，明胶酶谱法检测MMPs活性。结果: ARB组死亡率明显低于ADR-DCM组(20% vs 40%，P<0.01)。ADR-DCM组大鼠左室内径大于CON组，心功能明显低于CON组， ARB组左室内径增加程度及心功能各项指标变化低于ADR-DCM组。ADR-DCM组心肌羟脯氨酸及胶原含量高于CON组， ARB组显著低于ADR-DCM组(P<0.01)。ADR-DCM组左室心肌MMP-2、MMP-9蛋白表达及MMPs明胶酶活性明显高于CON组 (P<0.01)，ARB组MMP-2、MMP-9表达及活性明显低于ADR-DCM组(P<0.01)，而TIMP-1的表达在3组间均无显著差异(P>0.05)。结论: 缬沙坦部分通过抑制MMPs表达及活性逆转ADR-DCM左室重构，改善心功能。     

H型高血压合并腔隙性脑梗死患者Hcy水平与动脉粥样硬化的关系

目的 观察H型高血压合并腔隙性脑梗死(lacunar infarction,LI,简称腔梗)患者血浆同型半胱氨酸(hyperhomocysteine,Hcy)的水平与颈动脉粥样硬化的关系.方法 对入选的高血压合并腔梗患者,依据Hcy水平分为H型高血压合并腔梗组(Hcy≥10μmol/L,H型高血压组,n=120);普通高血压合并腔梗组(Hcy＜ 10μmol/L,普通高血压组,n =120);选择同期健康体检人群为对照组(n=115).用酶联免疫吸附试验法(enzyme-linked immunosorbent assay,ELISA法)检测各组受试者Hcy的水平,同时检测一般生化指标.采用彩色多普勒超声测定各组受试者颈动脉IMT.结果 H型高血压组的颈动脉IMT水平明显高于普通高血压组及对照组[IMT:H型高血压组(1.37±0.20)比普通高血压组(1.15±0.18)比对照组(0.57 ±0.22) mm,P＜0.001;Hcy:H型高血压组(19.2±3.5)比普通高血压组(9.2±1.4)比对照组(9.0±1.3).μmol/L,P＜0.001];Pearson线性分析结果显示高血压合并腔梗患者的Hcy水平与IMT呈正相关(r=0.413,P＜0.05),H型高血压组相关性更大(r=0.585,P＜0.05).以IMT为因变量进行多元逐步线性回归分析显示,Hcy(β=0.535,P＜0.01)是颈动脉IMT的影响因素.结论 高血压合并腔梗患者血浆Hcy水平升高与颈动脉IMT增厚呈正相关.H型高血压合并腔梗患者颈动脉粥样硬化更显著.     

同型半胱氨酸测定在急性脑梗塞合并颈动脉病变的临床应用价值分析

目的　探讨急性脑梗塞伴颈动脉病变同血同型半胱氨酸水平的相关性。 方法　将215例初发急性脑梗塞患者根据其空腹同型半胱氨酸 (Hcy) 值分为低同型半胱氨酸组103例及高同型半胱氨酸组112例。主要比较两组脑梗塞患者斑块和颈动脉狭窄的发生率以及严重程度。 结果　斑块以及严重的动脉狭窄更容易发生在急性脑梗塞高Hcy组。血浆Hcy的水平与斑块以及软斑的数量具有正相关性（kendall相关系数为0.145,P=0.006<0.05）;血浆Hcy的水平与重度动脉狭窄的发生率呈正相关（kendall相关系数为0.359,P=0.000<0.05）。 结论　急性脑梗塞患者血浆Hcy水平与颈动脉斑块和狭窄发生率呈正相关,提示积极干预高同型半胱氨酸血症有助于预防颈动脉病变。