慢性肾小球肾炎患者血清MMP-9和TIMP-1的浓度及意义

目的:观察慢性肾小球肾炎血清基质金属蛋白酶9(matrix metalo protein-ase-9,MMP-9)、金属蛋白酶组织抑制剂1(tissue inhibitors of metalloproteinases,TIMP-1)的浓度与肾组织中MMP-9、TIMP-1表达的相关性,探讨慢性肾小球肾炎血清MMP-9、TIMP-1对肾脏纤维化的判断价值。方法:通过肾组织活检病理检查,将入选慢性肾炎的病例分增生组(A组)15例,纤维化组(B组)15例,另选10例志愿者作为健康对照组C组。应用免疫组化法观察A、B两组MMP-9、TIMP-1在肾组织中的表达情况,并且进行半定量分析,比较它们之间有无差别。应用ELISA双抗体夹心法检测A、B、C三组MMP-9、TIMP-1在血清中的浓度,比较它们之间有无差别。观察A、B两组MMP-9、TIMP-1在肾组织中的表达水平与在血清的浓度有无相关性。结果:A、B两组MMP-9在肾小球和肾间质少见表达,主要在肾小管上皮细胞浆中表达增高,两组之间表达的强度有显著差异性;A组TIMP-1在肾小球中少见表达,在肾小管上皮细胞增强。B组TIMP-1在肾小球中有少量表达,在肾小管上皮细胞较A组进一步增强,两组之间表达的强度有显著差异性(P0.05)。血清中MMP-9、TIMP-1浓度在A、B组显著高于C组,血清中MMP-9在A、B两组之间无显著差异性,血清中TIMP-1在A、B、C三组间两两比较有显著差别(P0.05)。结论:慢性肾炎患者血清中MMP-9、TIMP-1浓度与肾脏组织中MMP-9、TIMP-1的表达呈正相关。MMP-9、TIMP-1的相关性分析P值小于0.01。血清MMP-9、TIMP-1参与了肾脏纤维化的进展,慢性肾小球肾炎血清中MMP-9、TIMP-1的浓度可在一定程度上反映肾脏纤维化程度。     

基质金属蛋白酶- 9, 组织抑制因子- 1 在进展期 胃癌中的表达与意义

目的：研究基质金属蛋白酶-9（matrix metalloproteinase-9,MMP-9）及其组织抑制因子-1（tissue inhibitor of metallopmteinase—1,TMP-1）在进展期胃癌中的表达情况,探讨二者的表达与胃癌侵袭转移闻的关系及二者间的联系。方法：应用免疫组化方法检测70例进展期胃癌标本中MMP-9,TIMP-1的表达,并进行回顾性随访。结果：馒反肌层以上者MMP-9的阳性表达（66．67％）明显高于肿瘤局限于粘膜、粘膜下者（20％P〈0.01）。MMP-9阳性表达与胃癌的淋巴转移与肝转移有相关性（P〈0．01）。TIMP-1的表达随胃癌浸润深度增加而减少,当肿瘤突破浆膜时TIMP-1的表达呈现陡降趋势（P〈0．01）。结论：MMP-9的过阳性表达和TIMP-1的表达失衡可能与胃癌转移行为有关。TIMP-1可能抑制胃癌的浸润转移。     

The MMP-9/TIMP-1 System is Involved in Fluoride-Induced Reproductive Dysfunctions in Female Mice

A total of 84 healthy female mice were kept with various concentrations of sodium fluoride (F) (0, 50, 100, 150 mg F^?/L in drinking water for 90 days) and were then mated with healthy male mice for 1 week to study the effect of excessive fluoride on female reproductive function, particularly in embryo implantation. The rate of pregnancy, litter size, and the birth weight of female mice were evaluated. Ultrastructural changes of uteri tissues were observed by transmission electron microscopy (TEM). The mRNA expression levels of MMP-9 and TIMP-1 were determined by quantitative real-time PCR. The protein expression levels of MMP-9 and TIMP-1 were analyzed by western blotting. Results showed a significant decrease of litter size in mice exposed to fluoride. TEM images of uteri tissue of mice that underwent a 150 mg/L F^? treatment for 90 days showed a vague nucleus, reduced microvilli, increased lysosomes, a dilated endoplasmic reticulum, and a vacuolization mitochondrion when compared with the control group. Following the damage of the structure, the expression levels of MMP-9 and TIMP-1 in uteri tissues were significantly unregulated in the F 150 group. These results show that MMP-9/TIMP-1 system disturbance and changes of histological structure in uteri tissue are involved in fluoride-induced reproductive dysfunctions.     

基质金属蛋白酶-2、-9及其组织抑制剂-1在大鼠肺组织中的增龄变化

目的研究基质金属蛋白酶（MMPs）-2、-9及组织型基质金属蛋白酶抑制剂（TIMPs）-1在大鼠肺组织中的增龄性变化规律。方法不同月龄（1月龄、3月龄、12月龄、18月龄、24月龄）雄性清洁级（SD）大鼠47只分为5组,按月龄取实验大鼠的右下叶肺组织,用流式细胞术检测MMP-2、MMP-9及TIMP-1的表达水平,进行定量分析。结果 MMP-2、MMP-9和TIMP-1均随着月龄的增长呈先降后升波谷型曲线变化;3月龄、12月龄和18月龄MMP-2、MMP-9和TIMP-1均较1月龄明显下降,且以12月龄为最低值;24月龄MMP-2、MMP-9和TIMP-1均较1月龄上升。MMP-2/TIMP-1比值和MMP-9/TIMP-1比值均随着月龄的增长呈先升后降波峰型曲线变化;12月龄和18月龄均较1月龄明显升高,且以18月龄为最高点;3月龄的MMP-2/TIMP-1较1月龄有所上升,3月龄的MMP-9/TIMP-1与1月龄持平;24月龄的MMP-2/TIMP-1和MMP-9/TIMP-1较1月龄也有不同程度上升。结论大鼠肺组织中MMPs及其抑制剂TIMPs随月龄的增长,呈特征性变化规律。     

MMP-2、MMP-7、MMP-9、TIMP-1及TIMP-2在乳腺癌组织中的表达及意义

目的:探讨基质金属蛋白酶及其抑制剂在乳腺癌组织中的表达及其与肿瘤浸润转移的关系,为乳腺癌的临床治疗及预后预测提供基础。方法:选择我院2012年5月至2014年5月收治的乳腺癌患者80例,对所选病例的乳腺癌组织、癌旁组织及正常乳腺组织样本进行检测。观察并比较不同乳腺组织中MMP-2,MMP-7、MMP-9、TIMP-1及TIMP-2 m RNA的表达水平。结果:与正常乳腺组织相比较,乳腺癌组织和癌旁组织中MMP-2、MMP-7、MMP-9,TIMP-1及TIMP-2 m RNA的表达显著增加,差异具有统计学意义(P0.05)。乳腺癌组织中MMP-2、MMP-7、MMP-9、TIMP-1及TIMP-2 m RNA的表达显著高于癌旁组织和正常组织,差异具有统计学意义(P0.05)。随着肿瘤范围扩大,MMP-2、MMP-7和MMP-9 m RNA的表达水平显著增加(P0.05),而TIMP-1和TIMP-2 m RNA表达无显著变化(P0.05)。随着淋巴结转移进展,MMP-2、MMP-7和MMP-9 m RNA的表达显著增加(P0.05),而TIMP-1和TIMP-2 m RNA无显著变化(P0.05)。结论:MMP-2、MMP-7、MMP-9、TIMP-1和TIMP-2的m RNA在乳腺癌组织中呈高表达,这可能与乳腺癌的发生和发展有关,而MMP-2、MMP-7和MMP-9可能有助于预测乳腺癌的侵袭行为。     

The Impact of MMP-2 and Its Specific Inhibitor TIMP-2 Expression on the WHO Grade and Prognosis of Gliomas in Chinese Population: a Meta-Analysis

So far, the prognostic value of matrix metalloproteinase 2 (MMP-2) and tissue inhibitor of matrix metalloproteinase 2 (TIMP-2) expressions in patients with gliomas has been widely reported, especially in China. But, the results were inconsistent. Thus, we conducted a meta-analysis to determine the correlation of MMP-2 and TIMP-2 expressions with the prognosis of patients with gliomas. Identical search strategies were used to search relevant literature in electronic databases updated to May 1, 2015, and odds ratios (ORs) with 95 % confidence intervals (95 % CIs) were estimated. Funnel plots and Egger’s tests were conducted for the evaluation of publication bias, and heterogeneity and sensitivity were also analyzed. Finally, a total of 25 studies involving 1572 patients were included in the meta-analysis. Coincidentally, all these studies were conducted in Chinese population. It was found that MMP-2 expression was significantly associated with high-WHO grade gliomas (n?=?24, OR?=?6.54, CI?=?4.98–8.60; I ²?=?0 %, P?=?0.911) and poor overall survival (OS), while it did not correlate to age (n?=?2, OR?=?0.78, CI?=?0.35–1.74; I ²?=?0 %, P?=?0.621) and gender (n?=?2, OR?=?1.15, CI?=?0.51–2.62; I ²?=?0 %, P?=?0.995). Moreover, the results of the pooled analysis indicated that there was no association between TIMP-2 expression and the WHO grade of gliomas (n?=?7, OR?=?1.02, 95 % CI?=?0.68–1.54; I ²?=?71.4 %, P?=?0.002), but the ratio of MMP-2 and TIMP-2 (MMP-2/TIMP-2) rose with the increase of the WHO grade of gliomas. In conclusion, there was no correlation between TIMP-2 expression and the WHO grade of gliomas, while MMP-2 expression was potently associated with high-WHO grade of gliomas.     

Matrix metalloproteinase-9,-3 and tissue inhibitor of matrix metalloproteinase-1 in colorectal cancer: relationship to clinicopathological variables

The balance between matrix metalloproteinases (MMPs) and their physiological tissue inhibitors of matrix metalloproteinases (TIMPs) is crucial in tumour invasion and progression. The aim of this study was to investigate the levels of MMP-9, MMP-3 and TIMP-1 in colorectal cancer (CRC) and to evaluate these proteinases and their inhibitor with respect to clinicopathological variables. Activities of pro- and active MMP-9 were measured in paired tumour and distant normal tissue specimens from 43 patients with CRC using gelatin zymography. ELISA was employed for the determination of MMP-9, MMP-3 and TIMP-1 protein expressions. The activity levels of pro- and active MMP-9 and protein expression levels of MMP-9, MMP-3 and TIMP-1 were higher in tumour tissues than in the corresponding normal tissues; the differences being significant for all (p < 0.05), except TIMP-1. Similarly, active MMP-9/proMMP-9 and the ratio of protein expression level of MMP-9-TIMP-1 were found to be significantly higher in tumour tissues ( p < 0.01). Among all the clinicopathological variables investigated, significant correlations were found between MMP-9 and presence of perineural invasion, MMP-3 and lymph node status, TIMP-1 and tumour differentiation, MMP-9/TIMP-1 ratio and histological types ( p < 0.05). In conclusion, MMP-3 was not as notably increased as MMP-9 in tumour tissues. However, different roles may be attributed to MMP-9 and MMP-3 in CRC development and progression. Additionally, assessment of TIMP-1 in relation to MMPs appeared to be crucial in CRC studies to provide a basis for the re-evaluation of the clinical usefulness of TIMP-1 in colorectal cancer.     

黄连提取物对动脉硬化小鼠斑块胶原类型及MMP-9/TIMP-1 比值 的影响*

目的:探讨黄连提取物对高脂喂养ApoE-/-小鼠主动脉AS斑块内胶原类型及基质金属蛋白酶-9( MMP-9)与基质金属蛋白酶组织抑制剂( TIMP-1)比值的影响,探讨黄连提取物稳定斑块的可能作用机制.方法:33只6-8周龄的ApoE基因敲除小鼠予高脂喂养13周后,待其形成成熟的AS斑块后,随机分为3组:模型组、黄连提取物组、辛伐他汀组(阳性对照组),每组11只.继续高脂喂养,并按体重比折算给予小鼠临床推荐剂量的相应药物治疗13周,处死动物,每只小鼠取主动脉根部的4个切面,行天狼猩红染色,检测各组小鼠主动脉斑块内Ⅰ、Ⅲ型胶原含量,以及斑块内MMP-9和TIMP-1的表达,计算MMP-9/TIMP-1比值.结果:给药13周后,图像分析结果显示,黄连提取物组小鼠主动脉斑块内Ⅰ型胶原含量与模型组比较有所增加,但无显著差异(P＞0.05);辛伐他汀组和黄连提取物组小鼠主动脉斑块内Ⅲ型胶原含量与模型组比较显著降低(P＜0.01).Ⅲ型/Ⅰ型胶原比值,两给药组与模型组比较均显著降低(P＜0.01).与模型组比较,黄连提取物和辛伐他汀组小鼠主动脉斑块内MMP-9的阳性表达均明显减少(P＜0.01),黄连提取物组主动脉斑块内TIMP-1的阳性表达与模型组相比明显增加(P＜0.01),辛伐他汀组TIMP-1表达有所增加,但无统计学差异(P＞0.05),两给药组之间比较无显著差异(P＞0.05).各给药组中MMP-9/TIMP-1比值均有所降低,与模型组比较具有显著差异(P＜0.05,P＜0.01).结论:在临床推荐剂量下,黄连提取物可明显改善ApoE-/-小鼠主动脉AS斑块内胶原类型,调整斑块内MMP-9/TIMP-1比值,从而促进斑块稳定.     

The Inhibitory Effect of C-phycocyanin Containing Protein Extract (C-PC Extract) on Human Matrix Metalloproteinases (MMP-2 and MMP-9) in Hepatocellular Cancer Cell Line (HepG2)

Spirulina platensis :have been studied for several biological activities. In the current study C-phycocyanin containing protein extract (C-PC extract) of Spirulina platensis have been studied for its effect on human matrix metalloproteinases (MMP-1, MMP-2 and MMP-9) and tissue inhibitors of MMPs (TIMP-1 and TIMP-2). In the present study, breast cancer cell line (MDA-MB 231) and hepatocellular cancer cell line (HepG2) were examined for inhibition of MMPs at different levels of expression after C-PC extract treatment. Herein, we have demonstrated that C-PC extract significantly reduced activity of MMP-2 by 55.13% and MMP-9 by 57.9% in HepG2 cells at 15 μg concentration. Additionally, the treatment has reduced mRNA expression of MMP-2 and MMP-9 at 20 μg concentration by 1.65-folds and 1.66-folds respectively. The C-PC extract treatment have also downregulated a mRNA expression of TIMP-2 by 1.12 folds at 20 μg concentration in HepG2 cells. Together, these results indicate that C-PC, extract successfully inhibited MMP-2 and -9 at different levels of expression and TIMP-2 at a mRNA expression level; however, extract did not have any effect on MMP-1 expressed in MDA-MB231 and TIMP-1 expressed in HepG2 cells as well as the exact mechanism of inhibition of MMP-2, MMP-9 and TIMP-2 remained unclear.     

Age-related lung tissue remodeling due to the local distribution of MMP-2, TIMP-2, TGF-β and Hsp70

Lung tissue remodeling requires complex interactions of matrix metalloproteinases (MMPs), tissue inhibitors of metalloproteinases (TIMPs), transforming growth factor (TGF) family and heat shock protein 70 (Hsp70). We evaluated the appearance and distribution of MMP-2, TIMP-2, TGF-β1 and Hsp70 in lung tissue using immunohistochemistry. Stained structures were graded semiquantitatively. Overall, more MMP-2, TIMP-2, TGF-β1 and Hsp70 were observed in bronchial cartilage, bronchial and alveola repithelium, and among alveolar macrophages. We evaluated mostly alveolar macrophages, bronchial epithelial cells and mucosal fibroblasts stained for TGF-β1, MMP-2 and TIMP-2. We also assessed strong or moderate correlations between numbers of cells containing TGF-β1, MMP-2, TIMP-2 in patients ≥ 60 years old. The presence of less TGF-β1 and more MMP-2, TIMP-2 and Hsp70 containing cells in all tissue groups indicated that local regulation was more dependent on MMP-2, TIMP-2 and Hsp70 distribution. Fewer TIMP-2, Hsp70 and TGF-β1 immunoreactive cells in younger individuals and increased expression of Hsp70 in elderly individuals demonstrated the influence of aging in lung remodeling. Findings of MMP-2, TIMP-2 and TGF-β1 immunoreactive cells in elderly individuals indicate lung remodeling due to aging.     

不同类型缺血性脑血管病血清VCAM-1、MMP-2、TIMP-1的表达及与神经功能缺损的关系分析

摘要 目的：探讨不同类型缺血性脑血管病血清血管细胞粘附分子-1（VCAM-1）、基质金属蛋白酶-2（MMP-2）、基质金属蛋白酶抑制剂1（TIMP-1）的表达及与神经功能缺损的关系。方法：选择2016年1月至2020年1月我院接诊的98例缺血性脑血管病患者为本研究对象,其中脑梗死55例设为脑梗死组,短暂性脑缺血发作组43例,并选择我院同期体检中心健康者50作为对照组,分析三组血清VCAM-1、MMP-2、TIMP-1水平之间的差异及不同神经缺损程度血清VCAM-1、MMP-2、TIMP-1水平、美国国立卫生研究院卒中量表（NIHSS）评分变化情况,及其之间的相关性。结果：脑梗死组血清VCAM-1、MMP-2、TIMP-1水平及NIHSS评分显著高于短暂性脑缺血发作组和对照组,差异显著（P＜0.05）;短暂性脑缺血发作组血清VCAM-1、MMP-2、TIMP-1水平及NIHSS评分显著高于对照组,差异显著（P＜0.05）;重度神经缺损组血清VCAM-1、MMP-2、TIMP-1水平及NIHSS评分显著高于中度神经缺损组和轻度神经缺损组,差异显著（P＜0.05）;中度神经缺损组血清VCAM-1、MMP-2、TIMP-1水平及NIHSS评分显著高于轻度神经缺损组,差异显著（P＜0.05）;相关性分析结果中显示,血清VCAM-1、MMP-2、TIMP-1均和NIHSS评分呈正相关（r=0.603, 0.915, 0.778,P＜0.05）。结论：血清VCAM-1、MMP-2、TIMP-1在缺血性脑血管病患者中表达异常,神经缺损越严重血清VCAM-1、MMP-2、TIMP-1表达越高。     

Dynamic alterations of connexin43, matrix metalloproteinase-2 and tissue inhibitor of matrix metalloproteinase-2 during ventricular fibrillation in canine

The aim of this study is to investigate the dynamic alterations of cardiac connexin 43 (Cx43), matrix metalloproteinase-2 (MMP-2) and tissue inhibitor of metalloproteinase-2 (TIMP-2) in the setting of different ventricular fibrillation (VF) duration. In this study, thirty-two dogs were randomly divided into sham control group, 8-min VF group, 12-min VF group, and 30-min VF group. Cx43 and phosphorylated Cx43 (p-Cx43) in tissues were detected by western blot and immunofluorescence analysis. MMP-2 and TIMP-2 were detected by western blot and immunohistochemistry analysis. The results showed that Cx43 levels in three VF groups were significantly decreased compared with sham control group. p-Cx43 levels in 12-min and 30-min VF groups were significantly reduced compared with sham control group. The ratio of p-Cx43/Cx43 was also decreased in VF groups. Compared with sham controls, no significant difference was observed between the sham control group and 8-min VF group in MMP-2 level, but MMP-2 level increased in 12-min and 30-min VF groups. The ratios of MMP-2/TIMP-2 were higher in VF groups, and were correlated with the duration of VF. A remarkable correlation was observed between the ratio of p-Cx43/Cx43 and MMP-2/TIMP-2 (r = ?0.93, P < 0.01). In conclusion, the alteration of Cx43 and/or p-Cx43 levels and the imbalance of MMP-2 and TIMP-2 may contribute to the initiation and/or persistence of VF. Maneuvers managed to modulate Cx43 level or normalize the balance of MMP-2/TIMP-2 are promising to ameliorate prognosis of VF.     

Acute phase of aortic dissection: a pilot study on CD40L,MPO, and MMP-1, -2, 9 and TIMP-1 circulating levels in elderly patients

Background

Acute aortic dissection (AAD) is an event which may be rapidly fatal without early diagnosis and treatment. Aging is one of the main risk factors that could leading to AAD. To date, no specific biomarkers are available to increase the speed of diagnosis. CD40 ligand (CD40L), myeloperoxidase (MPO), matrix metalloproteinase (MMP)-1, -2, -9 and metallopeptidase tissue inhibitor 1 (TIMP-1) are biologically related molecules which integrate inflammation, tissue injury and remodeling, all events associated to AAD.Our is a pilot study to evaluate whether circulating levels of these molecules may be used as potential biomarkers in timely diagnosis of AAD.

Results

Within 24 h of symptom onset, circulating CD40L, MPO, MMP-1,-2,-9 and TIMP-1 were quantified by enzyme-linked immunosorbent assays in 22 patients (40–86 years of age) with AAD of ascending aorta (type A according to Stanford classification) and 11 patients with AAD of descending aorta (type B). 30 healthy individuals age matched were used as control group compared to controls, both type A and B AAD patients had higher CD40L (p?<?0.001) and MPO (p?<?0.01) levels. MMP-1 was higher in the overall AAD group (p?<?0.01). After Stanford classification, type A group had increased level compared to both control and type B (p?<?0.01 and p?<?0.05, respectively). TIMP-1 was higher in both A and B groups compared to controls (p?<?0.001). No differences were observed in MMP-2 and MMP-9 levels.

Conclusions

The simultaneous evaluation of CD40L, MPO and MMP-1 and TIMP-1, which may contribute to structural changes in aortic tissue in AAD patients, seems to be a novel promising diagnostic panel.

     

Interstitial collagenase, gelatinases A and B and their endogenous inhibitors in squamous cell cervical carcinomas

Interstitial collagenase and gelatinases are matrix metalloproteinases (MMP), which play the key role in tumor invasion and metastasis determining tumor malignancy. The aim of this study was to elucidate peculiarities of expression of interstitial collagenase (MMP-1), gelatinases A and B (MMP-2 and MMP-9) and their endogenous tissue inhibitors TIMP-1 and TIMP-2 as invasive factors of squamous cell carcinomas (SCC) of human cervical cancer. The study was carried out using 24 specimens of SCC and 11 specimens of morphologically normal tissue adjacent to tumor. All carcinoma specimens expressed the E7 HPV-16 gene. Results obtained indicate that the increased expression of MMP-1 and MMP-9 and low expression of TIMP-1 and TIMP-2 make the main contribution to the destructive (invasive) potential of SCC. Changes in MMP-2 expression are less important. In the specimens of morphologically normal tissue adjacent to the tumor, substantial expression of MMP-1, MMP-2 and MMP-9 was registered. This expression appears to make additional contribution to the tumor destructive potential.     

Potential of Raloxifene in reversing osteoarthritis-like alterations in rat chondrocytes: An in vitro model study

The aim of this study was to investigate the effects of Raloxifene (Ral) on degeneration-related changes in osteoarthritis (OA)-like chondrocytes using two- and three-dimensional models. Five-azacytidine (Aza-C) was used to induce OA-like alterations in rat articular chondrocytes and the model was verified at molecular and macrolevels. Chondrocytes were treated with Ral (1, 5 and 10 μM) for 10 days. Caspase-3 activity, gene expressions of aggrecan, collagen II, alkaline phosphatase (ALP), collagen X, matrix metalloproteinases (MMP-13, MMP-3 and MMP-2), and MMP-13, MMP-3 and MMP-2 protein expressions were studied in two-dimensional model. Matrix deposition and mechanical properties of agarose-chondrocyte discs were evaluated in three-dimensional model. One μM Ral reduced expression of OA-related genes, decreased apoptosis, and MMP-13 and MMP-3 protein expressions. It also increased aggrecan and collagen II gene expressions relative to untreated OA-like chondrocytes. In three-dimensional model, 1 μM Ral treatment resulted in increased collagen deposition and improved mechanical properties, although a significant increase for sGAG was not observed. In summation, 1 μM Ral improved matrix-related activities, whereas dose increment reversed these effects except ALP gene expression and sGAG deposition. These results provide evidence that low-dose Ral has the potential to cease or reduce the matrix degeneration in OA.     

Expression of matrix metalloproteinases and their tissue inhibitors in the serum and cerebrospinal fluid of patients with HIV-1 infection and syphilis or neurosyphilis

The potential mechanisms for altered matrix metalloproteinase (MMP) or tissue inhibitors of matrix metalloproteinase (TIMP) function in patients with syphilis and HIV-1 co-infection (HIV-S) was unclear. To determine the expression of MMP-2, 9 and TIMP-1, 2, 4 in the serum and cerebrospinal fluid (CSF) of HIV-S patients, a total of 20 HIV-S patients and 8 controls were enrolled in a HIV-1 clinical cohort for diagnosis of neurosyphilis in Taiwan. Serum and CSF concentrations of MMP-2, 9, and TIMP-1, 2, 4 were determined by ELISA. Gelatin zymography was used to detect the expression of MMP-2 and MMP-9 in the CSF. Neurosyphilis was defined as a CSF white blood cell count ≥ 20 cells/μL or a reactive CSF Venereal Disease Research Laboratory (VDRL). All the patients with HIV-S were males. Most (85%) had sex with men (MSM) and serum rapid plasma reagin (RPR) titers of ≥ 1:32. The median age was 35 years (IQR 30-43). The median CD4 T cell counts at the time of the diagnosis of syphilis were 270 cells/μL (IQR 96-484). Ten patients (50%) had neurosyphilis based on a reactive CSF VDRL test (n=8) or increased CSF white cell counts ≥ 20/μL (n=2). The concentrations of CSF MMP-9, TIMP-1, and TIMP-2 were significantly higher in patients with HIV-S than the controls (P<0.05). The CSF TIMP-4 concentrations were significantly lower in those with HIV-S (452 pg/ml) than controls (3101 pg/ml), P<0001. There were no significant differences in serum concentrations between the groups. The only finding that distinguished HIV-1 patients with from those without neurosyphilis is a significant higher expression of CSF MMP-9. In conclusion, the MMP/TIMP system was found to be dysregulated in patients with HIV-S regardless of whether they met the laboratory definition of neurosyphilis. The CSF level of MMP-9 was the only measure that distinguished those with or without neurosyphilis.     

基质金属蛋白酶和组织金属蛋白酶抑制剂在肾细胞癌组织中的表达

目的:基质金属蛋白酶及组织金属蛋白酶抑制剂在肾细胞癌转移中占有重要的作用,研究肾细胞癌组织中MMP-2、MMP-9、TIMP-1和TIMP-2的表达情况,为肾癌转移的治疗提供理论依据。方法:选取36例肾细胞癌肾组织标本,从相同的肾细胞癌组织及癌旁肾组织获得对照样本,均进行根治性肾切除手术切除。肿瘤分期按TNM分期标准。为了统计评估,肿瘤1期和2期为低级,3期以上为高级。RT-PCR检测肿瘤和正常组织中的MMP-2、MMP-9、TIMP-1和TIMP-2的表达。结果:不同样本MMPs和TIMPs表达水平各不相同。肾细胞癌组织中MMP-2、MMP-9、TIMP-1、TIMP-2在肾细胞癌中的表达明显高于正常肾组织(P0.05)。在肾细胞癌的肿瘤分期方面,MMP-2与MMP-9和肿瘤的分期显著相关,随着肿瘤分期的增加,MMP-2与MMP-9的表达明显升高(P0.05),而TIMP-1与TIMP-2与肿瘤的分期无关。结论:肾细胞癌组织中TIMP-2、MMP-2,MMP-9,TIMP-1的mRNA表达显著高于正常肾组织,抑制MMPS的表达将成为治疗肾细胞癌转移的新的方向。