Long noncoding RNAs HAND2-AS1 ultrasound microbubbles suppress hepatocellular carcinoma progression by regulating the miR-873-5p/tissue inhibitor of matrix metalloproteinase-2 axis

BACKGROUND Increasing data indicated that long noncoding RNAs(lncRNAs)were directly or indirectly involved in the occurrence and development of tumors,including hepatocellular carcinoma(HCC).Recent studies had found that the expression of lncRNA HAND2-AS1 was downregulated in HCC tissues,but its role in HCC progression is unclear.Ultrasound targeted microbubble destruction mediated gene transfection is a new method to overexpress genes.AIM To study the role of ultrasound microbubbles(UTMBs)mediated HAND2-AS1 in the progression of HCC,in order to provide a new reference for the treatment of HCC.METHODS In vitro,we transfected HAND2-AS1 siRNA into HepG2 cells by UTMBs,and detected cell proliferation,apoptosis,invasion and epithelial-mesenchymal transition(EMT)by cell counting kit-8 assay,flow cytometry,Transwell invasion assay and Western blotting,respectively.In addition,we transfected miR-837-5p mimic into UTMBs treated cells and observed the changes of cell behavior.Next,the UTMBs treated HepG2 cells were transfected together with miR-837-5p mimic and tissue inhibitor of matrix metalloproteinase-2(TIMP2)overexpression vector,and we detected cell proliferation,apoptosis,invasion and EMT.In vivo,we established a mouse model of subcutaneous transplantation of HepG2 cells and observed the effect of HAND2-AS1 silencing on tumor formation ability.RESULTS We found that UTMBs carrying HAND2-AS1 restricted cell proliferation,invasion,and EMT,encouraged apoptosis,and HAND2-AS1 silencing eliminated the effect of UTMBs.Additionally,miR-873-5p targets the gene HAND2-AS1,which also targets the 3’UTR of TIMP2.And miR-873-5p mimic counteracted the impact of HAND2-AS1.Further,miR-873-5p mimic solely or in combination with pcDNA-TIMP2 had been transformed into HepG2 cells exposed to UTMBs.We discovered that TIMP2 reversed the effect of miR-873-5p mimic caused by the blocked signalling cascade for matrix metalloproteinase(MMP)2/MMP9.In vivo results showed that HAND2-AS1 silencing significantly inhibited tumor formation in mice.CONCLUSION LncRNA HAND2-AS1 promotes TIMP2 expression by targeting miR-873-5p to inhibit HepG2 cell growth and delay HCC progression.

Adenovirus-mediated tissue inhibitor of metalloproteinase-3 gene transfection inhibits rabbit intervertebral disc degeneration in vivo

The aim of this study was to investigate the inhibitory effects of recombinant adenovirus vector carrying tissue inhibitor of metalloproteinase-3(RAd-TIMP-3)against degeneration of rabbit intervertebral disc.Thirty Japanese white rabbits of 4 months old were randomly divided into 5 groups.Mild or moderate rabbit lumbar disc degeneration model was constructed with the controllable axial loading device by imposing 98 N pressure at the discs for 2 weeks.Various doses of virus were injected into the degenerated discs as follows:20μL of normal saline in group 1;20μL of RAd66(an empty adenovirus vector,1.0�1010 OPU/mL)in group 2;and 20,10,and 5μL of RAdTIMP-3(1.0�1010 OPU/mL)in groups 3,4,and 5,respectively.Two weeks after the injection,the discs were collected for investigations,including assessment of degeneration degrees according to the Thompson’s grading system,reverse-transcription polymerase chain reaction(RT-PCR)assay for TIMP-3 gene,Safranin O-Fast green staining,and immunohisto-chemical staining for TIMP-3 and type II collagen.According to Thompson’s criteria,the degeneration of groups 3,4,and 5,especially group 3,was alleviated as compared with groups 1 and 2.RT-PCR revealed that the expression of TIMP-3 in groups 3,4,and 5,especially in group 3,was significantly enhanced as compared with group 1(P<0.01).Both Safranin O-Fast green staining and type II collagen staining demonstrated better reserved integrity of disc matrix in groups 3,4,and 5 than in groups 1 and 2.TIMP-3 staining exhibited an obvious increase of positive-staining rate in groups 3,4,and 5 as compared with group 1.The positive-staining rate in group 3(79.42%�1.35%)was about 3 times that of group 1(25.47%�5.46%,P<0.01).RAdTIMP-3 can effectively protect the matrix of rabbit intervertebral disc against overloading-induced degeneration in a dose-dependent manner,resulting in the alleviation of disc degeneration.

Matrix metalloproteinase-9 and tissue inhibitor of metalloproteinase-1 expression in early focal cerebral infarction following urokinase thrombolysis in rats

Activity of matrix metalloproteinase-9 increases following cerebral ischemia/reperfusion, and is associated with cerebral microvascular permeability, blood-brain barrier destruction, inflammatory cell infiltration and brain edema. Matrix metalloproteinase-9 also likely participates in thrombolysis. A rat model of middle cerebral artery infarction was established by injecting autologous blood clots into the internal carotid artery. At 3 hours following model induction, urokinase was injected into the caudal vein. Decreased neurological severity score, reduced infarct volume, and increased expression of matrix metalloproteinase-9 and tissue inhibitor of metalloproteinase-1 were observed in the cerebral cortex 24 hours after urokinase thrombolysis. These results suggest that urokinase can suppress damage in the acute-early stage of cerebral infarction.

Expression of tissue inhibitor of metalloproteinase-1 in progression muscular dystrophy

Objective Tissue inhibitor of metalloproteinase-1 （TIMP-1） is a muhifunctional protein that has thc capacity to modify cellular activities and to modulate matrix turnover. This paper revealed the contributive role of TIMP-1 in progressive muscular dystrophy （PMD）. Methods We examined the expression and cellular localization of TIMP-1 protein using biopsied frozen muscle from patients with Duchenne muscular dystrophy （DMD）, Becker muscular dystrophy （BMD） , congenital muscular dystrophy （CMD） by immunohistochemistry, double immunofluorescence and Western blot analysis. Results The results of immunohistochemistry and double immunofluorescence showed that TIMP-1 was positive only in vascular endothelial cells of normal muscles. Immunohistochemistry and Western blot analysis showed that the staining intensity was distinctly increased in some dystrophic muscles of PMD for TIMP-1. Double immunofluorescence revealed that TIMP-1 strongly expressed in the regenerating muscle fibers, macrophages and macrophage infiltrating necrotic fibers. Some activated fibroblasts in endomysium and perimysium of DMD and CMD muscles were also positive for TIMP- 1. Conclusion The functional consequence of overexpression of TIMP-1 in the dystrophic muscles is unknown, but the elevated local expression of TIMP-1 in diseased muscles of PMD and their distinct distribution pattern provide evidence that TIMP-1 may participate in the pathogenesis of PMD.

Expressions of matrix metalloproteinase-9 and tissue inhibitor of metalloproteinase-1 in malignant peripheral nerve sheath tumor

BACKGROUND： Matrix metalloproteinase-9 （MMP-9） can degrade collagen IV （the main structural ingredient of basilar membrane）, and it also plays an important role in tumor vascularization, tumor cell progression, formation of metastatic focus, etc. Tissue inhibitor of metalloproteinase-1 （T1MP-1） can bind with MMP-9 to form 1 ： 1 compound and inhibit its activity, and can negatively regulate the tumor progression and metastasis. OBJECTIVE： To analyze the relationship of MMP-9 and T1MP-1 expressions with the pathological grade, metastasis and prognosis of malignant peripheral nerve sheath tumor （MPNST）. DESIGN： An observational comparative experiment. SETTING： Heze Medical College. PARTICIPANTS： Fifty-eight surgical pathological samples, which were clearly diagnosed to be MPNST, were collected from the pathological laboratory archives in the Department of Pathology, Heze Municipal Hospital from January 1988 to December 2003. The MPNST pathological types were common tumor in 53 cases, malignant triton tumor in 2 cases, epithelial MPNST in 2 cases and MPNST with gland differentiation in 1 case. The pathological grade was grade 1 in 11 cases, grade 2 in 24 cases and grade 3 in 23 cases. Besides, the resected tumor samples of 20 patients with benign peripheral nerve tumor （10 cases of nerve sheath tumor and 10 cases of neurofibromatosis） and the normal peripheral nerves （by-products of some surgeries） of 5 patients were also collected. The samples were used with the approval of the patients. Rat-anti-human MMP-9, TIMP-1 monoclonal antibody and S-P kit were purchased from Fuzhou Maixin Biotechnology, Co.,Ltd. METHODS： The documented paraffin blocks were again prepared to sections of 5 lJ m. The expressions of MMP-9 and TIMP-1 in the samples were detected with mmunohistochemical S-P method. The relationships of the MPNST severity, recurrence, metastasis and survival rate with the expressions of MMP-9 and TIMP-1 were analyzed. MAIN OUTCOME MEASURES： Relationships of MMP-9 and TIMP-1 expressions with the MPNST severity and prognosis. RESULTS： ①Expressions of MMP-9 and TIMP-1 in three tissues： MMP-9 and TIMP-1 stainings were mainly observed in cytoplasm. Among the 58 MPNST patients, the MMP-9 expression was significantly higher than those in normal peripheral nerve and benign tumor （P 〈 0.05）, while the TIMP-1 expression in MPNST was lower than those in normal peripheral nerve and benign tumor （P 〈 0.05）. ②Relationship of MMP-9 and TIMP-1 expressions with the severity and prognosis of MPNST： The expressions of both proteins were observed in the four subtypes. The positive expression of MMP-9 in the MPNST patients of grades 2 - 3 was significantly higher than that in the MPNST patients of grade 1 （P 〈 0.05）, while the expression of MMP-9 was significantly lower than that in the MPNST patients of grade 1 （P 〈 0.05）. The metastatic rate was positively correlated with MMP-9 expression （r =1.696, P 〈 0.05）, but negatively correlated with TIMP-1 expression （r = - 2.125, P 〈 0.05）. CONCLUSION： MMP-9 and TIMP-1 are associated with MPNST pathological grades and metastasis, and can be used as the indicators for judging the severity and orognosis of MPNST.

Serum Matrix Metalloproteinase 3 and Tissue Inhibitor Metalloproteinase 1 in Vascular Dementia: A Comparative Study

Aim: To compare serum level of matrix metalloproteinase 3 (MMP3) and tissue inhibitor metallo-proteinase 1 (TIMP1) in vascular dementia patients and healthy control subjects. Methods: A case control study was carried out in Ain Shams University hospital, Cairo, Egypt. 32 cases with vascular dementia were collected and classified into 2 subgroups;vascular dementia of multiinfarct type (VDMI) 14 patients, and vascular dementia of subcortical type (VDSC) 18 subjects. 23 cases with normal cognitive functions were collected as control group. Cases were subjected to comprehensive geriatric assessment, neurological examination, neuropsychological testing and brain CT scan. Blood sample was collected to analyze serum level of matrix metalloproteinase 3 (MMP3) and tissue inhibitor metalloproteinase 1 (TIMP1). Results: Mean serum level of TIMP1 (20.85 × 103 picogram/ml) was significantly lower than mean serum level of TIMP1 in control group (27.69 × 103 picogram/ml) (p = 0.018). The same finding was also evident when comparing VDMI subgroup mean serum TIMP1 (18.71 × 103 pc/ml) to control group (p = 0.025). There was no significant difference between mean serum MMP3 levels in cases group (mean = 67.39 × 103) as compared to control group (mean = 61.65 × 103 pc/ml) (p = 0.519). Conclusion: Patients with VD particularly VDMI has lower serum level of TIMP1 as compared to control group.

血清金属蛋白酶组织抑制剂3和性别决定区Y框蛋白2在2型糖尿病肾损伤早期诊断中的临床应用

目的探究血清金属蛋白酶组织抑制剂3(tissue inhibitors of metalloproteinases 3,TIMP3)和性别决定区Y框蛋白2(transcription factor determining region Y box protein 2,SOX2)对2型糖尿病(type 2 diabetes mellitus,T2DM)肾损伤的早期诊断。方法选取2022年4月至2023年4月在华北石油管理局总医院就诊的102例T2DM患者为研究对象,根据24 h尿蛋白排泄率(uri-nary albumin excretion rate,UAER)将T2DM患者分为肾损伤组(n=40)和无肾损伤组(n=62),另选取同期在华北石油管理局总医院行体检的健康者50名为对照组。酶联免疫吸附法测定所有受试者血清TIMP3、SOX2水平;比较3组受试者一般资料、糖化血红蛋白(hemoglobin A1c,HbA1c)、UAER、血肌酐(serum creatinine,Scr)、估算肾小球滤过率(estimated glomerular filtration rate,eGFR)、血清TIMP3、SOX2水平;Pearson相关性分析血清TIMP3与SOX2及两者与HbA1c、UAER、Scr、eGFR之间的关系;受试者工作特征曲线(receiver operating characteristic curve,ROC)分析血清TIMP3、SOX2对T2DM患者肾损伤的诊断价值。结果T2DM患者血清TIMP3[(0.68±0.17)μg/L比(1.35±0.35)μg/L]及eGFR[(105.99±20.56)mL·min^(-1)·(1.73 m^(2))比(133.15±26.18)mL·min^(-1)·(1.73 m^(2))^(-1)]显著低于对照组(P<0.05),且肾损伤患者血清TIMP3[(0.47±0.11)μg/L比(0.82±0.21)^(-1)μg/L]及eGFR[(74.69±10.22)mL·min^(-1)·(1.73 m^(2))比(126.18±27.23)mL·min^(-1)·(1.73 m^(2))^(-1)]显著低于无肾损伤患者(P<0.05);血清SOX2[(8.91±1.82)kU/L比(5.15±1.31)kU/L]及HbA1c[(8.80±1.55)%比(5.52±0.83)%]、UAER[(70.13±18.06)mg/24 h比(13.22±3.61)mg/24 h]、Scr[(82.14±15.23)µmol/L比(53.19±5.62)µmol/L]显著高于对照组(P<0.05),且肾损伤患者血清SOX2[(10.81±2.13)kU/L比(5.15±1.31)kU/L]及UAER[(156.83±40.29)mg/24 h比(13.22±3.61)mg/24 h]、Scr[(113.77±13.58)µmol/L比(53.19±5.62)µmol/L]显著高于无肾损伤患者(P<0.05)。Pearson相关性分析结果显示,TIMP3与UAER、Scr、HbA1c呈显著负相关(P<0.05),与eGFR呈显著正相关(P<0.05);SOX2与UAER、Scr、HbA1c呈显著正相关(P<0.05),与eGFR呈显著负相关(P<0.05);血清TIMP3与SOX2呈显著负相关(r=-0.590,P<0.05)。ROC结果显示,血清TIMP3联合SOX2诊断T2DM患者肾损伤的敏感度和特异度分别为95.0%、85.3%,显著高于TIMP3、SOX2单独测定。结论T2DM肾损伤患者血清TIMP3水平显著降低,SOX2水平显著升高,且两者与T2DM患者肾损伤密切相关,可用于T2DM患者肾损伤早期诊断。

电针对负透镜诱导型近视豚鼠视网膜中MMP-3和TIMP-3及Col3α1表达的影响

目的:探讨电针对负透镜诱导型近视豚鼠视网膜中基质金属蛋白酶(MMP)-3、金属蛋白酶组织抑制剂(TIMP)-3和III型胶原α1(Col3α1)表达的影响。方法:将80只豚鼠随机分为正常对照组、负透镜诱导型近视组、电针干预组和假穴组,每组20只。正常对照组不做任何干预,负透镜诱导型近视组、电针干预组和假穴组,右眼均配戴-6.0 D透镜,左眼不戴镜。戴镜同时电针干预组在合谷穴与太阳穴给予电针刺激,假穴组豚鼠在假穴位进行干预。造模前,造模2、4 wk检影验光检测屈光度,A超检测眼轴长度,HE染色观察视网膜组织结构变化,定量聚合酶链反应(Q-PCR)和蛋白免疫印迹(WB)检测视网膜中MMP-3、TIMP-3、Col3α1 mRNA和蛋白表达的情况。结果:造模2、4 wk,负透镜诱导型近视组与正常对照组相比眼轴长度均明显增加(均P<0.05),屈光度均明显降低(均P<0.05);与负透镜诱导型近视组相比,电针干预组干预后眼轴长度均减少(均P<0.05),屈光度均增加(均P<0.05)。HE染色显示,正常对照组豚鼠视网膜组织各层分界明显,排列规则;负透镜诱导型近视组视网膜厚度、内外核层厚度及细胞数量减少,排列不规则;电针干预组视网膜整体结构较为完善,排列较规则,组织各层形态结构未出现明显异常。Q-PCR和WB检测结果显示,负透镜诱导型近视组视网膜中MMP-3、TIMP-3和Col3α1 mRNA及蛋白表达均比正常对照组明显升高(均P<0.05);而电针干预组干预后视网膜中MMP-3、TIMP-3和Col3α1mRNA及蛋白表达均较负透镜诱导型近视组明显降低(均P<0.05)。结论:电针能够延缓负透镜诱导型近视豚鼠眼轴增长,下调负透镜诱导型近视豚鼠视网膜中的MMP-3、TIMP-3及Col3α1 mRNA及蛋白表达。

柚皮素通过调控平滑肌细胞TIMP-3表达促进动脉粥样硬化斑块稳定

[目的]探究柚皮素对动脉粥样硬化斑块胞外基质重构和斑块稳定性的影响。[方法]分离原代小鼠血管平滑肌细胞,进行不同剂量的柚皮素处理。对高脂诱导的ApoE-/-小鼠进行柚皮素灌胃16周,天狼星红-苏木精染色分析主动脉根部斑块坏死核面积、斑块内胶原含量和纤维帽厚度,Van Gieson染色检测弹力蛋白降解,明胶酶谱法和荧光标记明胶法检测斑块内基质金属蛋白酶(MMP)活性。[结果]柚皮素(50μmol/L)促进平滑肌细胞信号转导及转录活化因子6(STAT6)磷酸化和组织型基质金属蛋白酶抑制剂3(TIMP-3)的转录活性,TIMP-3的表达升高3.1倍(P<0.001)。柚皮素(80 mg/kg)处理后,与对照组相比,主动脉根部斑块坏死核面积降低53%(P<0.01)、纤维帽厚度提高近50%(P<0.05),弹力纤维降解程度降低。同时,柚皮素促进斑块内TIMP-3的表达,斑块内MMP活性也相应降低。慢病毒介导的体内抑制TIMP-3表达可降低柚皮素对斑块稳定的保护作用。[结论]柚皮素通过提高平滑肌细胞内TIMP-3表达,改善细胞外基质成分,促进动脉粥样硬化斑块稳定。

肺炎支原体肺炎患儿血清TIMP3和SOD2水平与肠道菌群及免疫功能的关系研究

目的探究肺炎支原体肺炎(MPP)患儿血清金属蛋白酶组织抑制因子3(TIMP3)和超氧化物歧化酶2(SOD2)水平与肠道菌群及免疫功能的关系。方法选取MPP患儿120例作为研究对象,分为轻症组65例和重症组55例,同时选取120例在本院查体的健康儿童作为对照组,比较三组血清TIMP3、SOD2水平。Pearson法分析血清TIMP3、SOD2水平与肠道菌群及免疫功能的相关性。结果与对照组相比,轻症组和重症组血清TIMP3水平显著降低,SOD2及D-乳酸水平升高,粪便中双歧杆菌、大肠杆菌、乳酸杆菌、链球菌水平依次降低,免疫功能水平降低(P均<0.05)。相关性分析显示,MPP患儿血清TIMP3分别与双歧杆菌、大肠杆菌、乳酸杆菌、IgG、CD4^(+)/CD8^(+)呈正相关性,与D-乳酸、hs-CRP、TNF-α、WBC呈负相关性;SOD2与双歧杆菌、大肠杆菌、乳酸杆菌、IgG、IgM、补体C3、补体C4、CD4^(+)/CD8^(+)呈负相关性,与D-乳酸、hs-CRP、TNF-α、WBC呈正相关性(P<0.05)。结论重症MPP患儿血清TIMP3水平降低,SOD2水平升高,并且二者与MPP患儿肠道菌群及免疫功能密切相关。

TIMP3/MMP9通路与非小细胞肺癌上皮间质转化的相关性研究

目的:研究TIMP3/MMP9通路与非小细胞肺癌上皮间质转化的相关性。方法:选取2020年6月-2022年3月皖西卫生职业学院附属医院49例非小细胞肺癌患者癌组织以及22例患者癌旁组织,比较TIMP3/MMP9通路相关蛋白差异并采用spearman法检验其相关性。结果:非小细胞肺癌组织与癌旁组织间,组织分化程度、TNM分期、淋巴结转移间TIMP3/MMP9通路相关蛋白比较差异明显(P<0.05);spearman分析结果显示:TIMP3与E-钙黏蛋白呈正相关(P<0.05),与波形蛋白呈负相关(P<0.05),MMP9与E-钙黏蛋白呈负相关(P<0.05),与波形蛋白呈正相关(P<0.05)。结论:TIMP3/MMP9通路与非小细胞肺癌上皮间质转化相关。

阿尔茨海默病患者血清Ang、TIMP3水平与β-淀粉样蛋白沉积及认知功能的关系

目的探讨阿尔茨海默病(AD)患者血清血管抑制素(Ang)、组织金属蛋白酶抑制剂3(TIMP3)水平与β-淀粉样蛋白(Aβ)沉积及认知功能的关系。方法将2020年1月至2022年5月于该院治疗的143例AD患者纳入研究作为AD组,另选取同期55例体检健康者作为对照组。采用酶联免疫吸附法检测血清Ang、TIMP3水平。采用Pearson/Spearman相关分析AD患者血清Ang、TIMP3水平与Aβ1-40、Aβ1-42、总Tau(t-Tau)、磷酸化Tau181(p-Tau181)水平和简易精神状态检查表(MMSE)评分的相关性,绘制受试者工作特征(ROC)曲线分析血清Ang、TIMP3水平对AD的诊断价值。结果AD组血清Ang、TIMP3水平均低于对照组,差异有统计学意义(P<0.05)。Pearson/Spearman相关分析显示:AD患者血清Ang、TIMP3水平与Aβ1-40水平(r=-0.446、-0.465,P<0.05)及MMSE评分(r=-0.558、-0.607,P<0.05)均呈负相关,与Aβ1-42水平呈正相关(r=0.443、0.437,P<0.05),与t-Tau、p-Tau181水平无明显的相关性(P>0.05)。ROC曲线分析显示,血清Ang、TIMP3水平单项及联合用于AD诊断的曲线下面积(AUC)分别为0.798、0.793、0.901,灵敏度分别为96.50%、67.13%、74.13%,特异度分别为56.36%、80.00%、90.91%。血清Ang、TIMP3水平联合用于AD诊断的AUC大于二者单项用于AD诊断(P<0.05)。结论血清Ang、TIMP3水平降低与AD患者认知功能下降和Aβ沉积有关,可作为AD诊断的辅助指标,而且血清Ang、TIMP3水平联合检测有助于提升对AD的诊断效能。

LncRNA MEG3调控microRNA-181b-5p/TIMP3对前列腺癌细胞侵袭、迁移的影响

目的探究长链非编码RNA母系表达基因3(lncRNA MEG3)调控微小RNA-181b-5p(microRNA-1816-5P,简称miR-181b-5p)/组织金属蛋白酶抑制因子3(TIMP3)对前列腺癌细胞侵袭、迁移的影响。方法收集2019年12月—2021年12月本院所收治的20例前列腺癌患者前列腺癌组织及其对应癌旁组织;实时荧光定量PCR(qRT-PCR)检测组织MEG3、miR-181b-5p表达;将前列腺癌细胞(PC3细胞)随机分为对照组(未处理)、pcDNA3.1-NC组(转染pcDNA3.1-NC)、pcDNA3.1-MEG3组(转染pcDNA3.1-MEG)、pcDNA3.1-MEG3+miR-NC组(pcDNA3.1-MEG3与miR-NC共转染)、pcDNA3.1-MEG3+miR-181b-5p mimic组(pcDNA3.1-MEG3与miR-181b-5p mimic共转染);qRT-PCR检测细胞MEG3、miR-181b-5p表达;MTT实验、Transwell实验、划痕实验分别检测PC3细胞活力、侵袭及迁移能力;Western blot检测PC3细胞TIMP3、基质金属蛋白酶(MMP)9、MMP2蛋白表达;双荧光素酶实验检测MEG3、miR-181b-5p、TIMP3的靶向关系。结果与癌旁组织的表达相比,MEG3在前列腺癌组织(0.37±0.05 vs.1.00±0.04)及细胞(0.31±0.06 vs.1.00±0.01)中表达显著降低(P<0.05);与对照组相比,pcDNA3.1-MEG3组miR-181b-5p表达(0.26±0.04 vs.1.00±0.02)、细胞存活率(53.60±5.22 vs.100.00±0.00)、侵袭细胞数(62.33±9.85 vs.162.34±21.30)、细胞迁移率(32.85±3.80 vs.75.22±5.96)、MMP9(0.61±0.08 vs.1.62±0.23)、MMP2(0.73±0.10 vs.1.20±0.16)表达显著降低,MEG3(2.31±0.36 vs.1.00±0.01)、TIMP3蛋白(1.32±0.24 vs.0.53±0.08)表达显著增加(P<0.05);miR-181b-5p过表达可逆转上述指标变化(P<0.05);miR-181b-5p与MEG3、TIMP3间均存在靶向关系。结论lncRNA MEG3过表达可通过抑制miR-181b-5p来促进TIMP3表达,从而抑制PC3细胞侵袭、迁移。

TGF-β1/Smad3信号通路调控MMP-13/TIMP-1蛋白表达在糖尿病膀胱纤维化中的作用研究

目的探讨转化生长因子β1(TGF-β1)/细胞信号转导分子3(Smad3)信号通路调控基质金属蛋白酶13(MMP-13)/基质金属蛋白酶抑制剂1(TIMP-1)蛋白表达在糖尿病膀胱纤维化中的作用。方法将80只雄性Wistar大鼠按随机数字表法分为糖尿病组和正常对照组,每组40只;另取20只糖尿病大鼠按随机数字表法分为TGF-β1敲除组和Smad3敲除组,每组10只。采用链脲佐素65 mg/kg一次性给药法建立糖尿病模型;采用Cas9 gene targeting技术分别敲除TGF-β1或Smad3基因。采用HE或VG染色法观察糖尿病组与正常对照组大鼠膀胱组织病理学形态,Western blot法检测并比较糖尿病组与正常对照组、糖尿病组与TGF-β1敲除组、糖尿病组与Smad3敲除组大鼠膀胱平滑肌组织中相关信号通路因子蛋白表达水平,包括TGF-β1、Smad3、MMP-13、TIMP-1、Ⅰ型胶原蛋白(colⅠ)、Ⅲ型胶原蛋白(colⅢ)等。结果HE及VG染色结果显示,糖尿病组大鼠膀胱组织胶原纤维明显增多。糖尿病组大鼠膀胱平滑肌组织中TGF-β1、Smad3、MMP-13、TIMP-1蛋白表达水平均明显高于正常对照组,MMP-13、TIMP-1、colⅠ、colⅢ蛋白表达水平均明显高于TGF-β1敲除组、Smad3敲除组,差异均有统计学意义(均P<0.05)。结论MMP-13、TIMP-1在糖尿病膀胱纤维化中呈高表达。TGF-β1/Smad3信号通路通过调控MMP-13/TIMP-1蛋白表达参与糖尿病膀胱纤维化的发生、发展。

腹膜透析患者腹膜冲洗液MMPs/TIMPs、25(OH)D 3水平变化与腹膜透析相关性腹膜炎、腹膜纤维化的关系

目的探究腹膜透析(PD)患者腹膜冲洗液基质金属蛋白酶(MMPs)/金属蛋白酶组织抑制因子(TIMPs)、血25-羟基维生素D_(3)[25(OH)D_(3)]水平变化与腹膜透析相关性腹膜炎(PDAP)、腹膜纤维化的关系。方法收集2018年1月—2020年1月收治的58例PD为研究对象,根据是否发生PDAP分为PDAP组和无PDAP组,根据是否出现腹膜纤维化分为腹膜纤维化组和无腹膜纤维化组,查阅患者临床病历资料,检测各组腹膜冲洗液中MMPs/TIMPs、25(OH)D_(3)水平,分析影响PD患者PDAP或腹膜纤维化发生的易感因素,采用受试者工作特征(ROC)曲线分析腹膜冲洗液MMPs/TIMPs、25(OH)D_(3)水平变化对PDAP或腹膜纤维化发生的预测价值。结果58例PD中13例(22.41%)出现PDAP,10例(17.24%)出现腹膜纤维化。多因素Logistic回归分析显示,年龄、透析时间、MMPs/TIMPs、25(OH)D_(3)是PD患者PDAP发生的影响因素(P<0.05,P<0.01);透析时间、MMPs/TIMPs、25(OH)D_(3)是PD患者腹膜纤维化发生的影响因素(P<0.05,P<0.01)。ROC曲线分析显示,腹膜冲洗液MMPs/TIMPs、25(OH)D_(3)联合检测预测PD患者PDAP、腹膜纤维化发生的曲线下面积、敏感度分别为0.840、0.835和0.892、0.811,均较二者单一检测高。结论PD患者发生PDAP、腹膜纤维化的风险不容忽视,加强对年龄≥60岁、PD时间较长高危人群的重视,通过监测腹膜冲洗液MMPs/TIMPs、25(OH)D_(3)水平,对PD患者PDAP、腹膜纤维化的有效防治十分重要。

溃疡性结肠炎患者血清PTX3TFPI表达情况及其临床意义

目的探讨溃疡性结肠炎(UC)患者血清正五聚蛋白3(PTX3)、组织因子途径抑制物(TFPI)表达情况及其临床意义。方法选择2020年7月至2022年5月华北理工大学附属医院收治的157例UC患者作为观察组,根据治疗前Mayo评分将其分为缓解期组(Mayo评分0~2分,n=62)和活动期组(Mayo评分≥3分,n=95)。活动期患者根据病情,分为轻度组32例、中度组40例和重度组23例;根据患者预后情况,将观察组分为好转组(n=108)例和未好转组(n=49),采用酶联免疫吸附法(ELISA)检测治疗前后血清PTX3、TFPI水平;ROC曲线分析治疗前血清PTX3、TFPI对UC患者临床治疗后未好转的诊断价值。结果治疗前,缓解期组血清PTX3水平为(8.56±2.35)ng/mL,TFPI为(85.42±9.62)ng/mL,低于活动期组,差异有统计学意义(P<0.05);缓解期组与活动期组患者治疗前后PTX3差值比较,差异有统计学意义(P<0.05);活动期中度组、重度组患者治疗前血清水平高于轻度组,重度组患者治疗前血清PTX3、TFPI水平高于中度组,差异有统计学意义(P<0.05);未好转组UC患者治疗前血清PTX3水平高于好转组,差异有统计学意义(P<0.05);治疗前血清PTX3、TFPI单独及联合诊断UC患者未好转的曲线下面积分别为0.830(95%CI=0.762~0.885)、0.819(95%CI=0.749~0.876)和0.907(95%CI=0.851~0.948)。结论UC患者血清PTX3、TFPI升高,与患者病情严重程度和预后有关,可能作为UC患者病情评估与疗效评价的标志物。

血清Nrf2和TIMP3水平在川崎病早期诊断及预后中的意义

目的探讨血清核因子红细胞2相关因子(Nrf2)和组织抑制剂金属蛋白酶3(TIMP3)表达在川崎病(KD)早期诊断及预后中的意义。方法选取2019年9月至2021年9月我院收治的KD患儿84例为研究对象(KD组),另选取同期我院体检中心进行体检的健康儿童84例作为对照组,其中KD组根据患儿预后情况又分为冠状动脉病变(CAL)组(18例)及无CAL组(66例),收集基本资料及实验室指标。酶联免疫吸附法(ELISA)检测血清Nrf2和TIMP3水平;相关性分析采用Pearson法;绘制受试者工作特征(ROC)曲线分析血清Nrf2和TIMP3水平预测KD及CAL的价值。结果KD组血清Nrf2和TIMP3水平显著低于对照组,血小板计数(PLT)、白细胞介素-6(IL-6)、血沉(ESR)及氨基末端脑钠肽前体(NT-proBNP)水平均显著高于对照组(P<0.05);KD患儿血清Nrf2与IL-6、NT-proBNP均呈负相关(r=-0.512、-0.530,P<0.05),血清TIMP3与IL-6、NT-proBNP均呈负相关(r=-0.465、-0.482,P<0.05);ROC曲线显示,Nrf2诊断KD的AUC为0.769,截断值为789.85 U/L,其敏感度、特异度分别为79.76%、67.86%,TIMP3诊断KD的AUC为0.790,截断值为147.76 pg/ml,其敏感度、特异度分别为65.48%、79.76%,二者联合诊断KD的AUC为0.857,明显高于二者单独诊断(Z_(联合vs.Nrf2)=2.951、P=0.003,Z_(联合vs.TIMP3)=2.658、P=0.008)。CAL组血清Nrf2和TIMP3显著低于无CAL组,IL-6、ESR及NT-proBNP水平均显著高于无CAL组(P<0.05);ROC曲线显示,Nrf2预测CAL的AUC为0.812,截断值为634.12 U/L,其敏感度、特异度分别为94.44%、62.12%,TIMP3预测CAL的AUC为0.736,截断值为127.71 pg/ml,其敏感度、特异度分别为94.44%、48.48%,二者联合预测CAL的AUC为0.889,明显高于二者单独预测(Z_(联合vs.Nrf2)=2.254、P=0.024,Z_(联合vs.TIMP3)=2.724、P=0.006)。结论KD患儿血清Nrf2、TIMP3低表达,二者联合用于KD诊断及预后均有一定价值。

Signal transducers and activators of transcription 3 mediates up-regulation of angiotensin ll-induced tissue inhibitor of metalloproteinase-1 expression in cultured human senescent fibroblasts

Backgroud Angiotensin Ⅱ （Ang Ⅱ）, a principal effector of renin-angiotensin system （RAS） and increased in aging tissues, can stimulate JAK/STAT pathway via the G-protein-coupled Ang Ⅱ receptor type Ⅰ （AT1） and induce nuclear translocation of signal transducers and activators of transcription （STAT）. To further explore the role of Ang Ⅱ in aging, we examined the effect of Ang Ⅱ on human replicative senescent diploid fibroblast WI-38 cells.

Effects of (-)-epigallocatechin-3-gallate on expression of matrix metalloproteinase-1 and tissue inhibitor of metalloproteinase-1 in fibroblasts irradiated with ultraviolet A

Background It is known that ultraviolet irradiation can affect cellular function through a number of signaling pathways ( ) epigallocatechin 3 gallate (EGCG) is the major effective component in green tea and can offer protection from ultraviolet induced damage In this study, we investigated the protective mechanism of EGCG on human dermal fibroblasts damaged by ultraviolet A (UVA) in vitro Methods Transcription factor Jun protein levels were measured by Western blot Matrix metalloproteinase 1 (MMP 1) and tissue inhibitor of metalloproteinase 1 (TIMP 1) mRNA were studied by reverse transcription polymerase chain reaction (RT PCR) analysis in conjunction with computer assisted image analysis MMP 1 and TIMP 1 proteins were quantified by enzyme linked immunosorbent assay (ELISA) Results EGCG decreased transcription activity of Jun protein after induction by UVA Both the mRNA and protein levels of MMP 1 were increased by UVA irradiation, while no significant changes were observed in TIMP 1 levels The ratio of MMP 1 to TIMP 1 showed statistically significant differences compared with the control EGCG decreased the ratio of MMP 1 to TIMP 1 by inhibiting UVA induced MMP 1 expression ( P <0 05) Conclusion EGCG can protect human fibroblasts against UVA damage by downregulating the transcription activity of Jun protein and the expression of MMP 1 The ratio of MMP 1 to TIMP 1, rather than the levels of MMP 1 or TIMP 1 alone, may play a significant role in human skin photodamage

膝骨关节炎患者血清MMP-3、TIMP-1水平变化及相关性研究

目的观察膝骨关节炎(KOA)患者血清基质金属蛋白酶-3(MMP-3)、基质金属蛋白酶组织抑制物-1(TIMP-1)变化并进行相关性研究。方法采用酶联免疫吸附法(ELISA)对60例KOA患者(KOA组)及30例正常对照组血清MMP-3、TIMP-1、白细胞介素-1β(IL-1β)、转化生长因子-β(TGF-β)进行检测;采用流式细胞术检测外周血CD4+CD25+CD127low/-调节性T细胞(Treg)比例;依据KOA严重程度指数(LequesneMG)评分标准将60例KOA患者分为轻、中、重3组,并以60岁为界限将KOA患者分为<60岁组(26例)、≥60岁组(34例),分析KOA患者血清MMP-3、TIMP-1变化及与LequesneMG积分、症状量化积分、国际普适生活质量量表(SF-36)积分、焦虑自评量表(SAS)积分、抑郁自评量表(SDS)积分、红细胞沉降率(ESR)、超敏C-反应蛋白(hs-CRP)、IL-1β、TGF-β、CD4+CD25+CD127low/-Treg的相关性。结果①与正常对照组比较,KOA组血清MMP-3水平显著升高,TIMP-1水平显著降低(P<0.05)。②重度组血清MMP-3、TIMP-1水平显著高于轻度组及中度组,中度组显著高于轻度组(P<0.05)。③与<60岁组比较,≥60岁组血清MMP-3、TIMP-1显著升高(P<0.05)。④相关性分析显示KOA患者血清MMP-3、TIMP-1与LequesneMG积分、SAS积分、ESR、hs-CRP、IL-1β、TGF-β呈正相关,与SF-36各维度积分呈负相关,MMP-3与CD4+CD25+CD127low/-Treg呈负相关(P<0.05)。结论 KOA患者血清MMP-3显著升高,TIMP-1显著降低,其表达失调可能参与KOA发病过程。