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.

Duodenal-jejunal bypass surgery on type 2 diabetic rats reduces the expression of matrix metalloproteinase-9 and tissue inhibitor of matrix metalloproteinase-1 in the thoracic aorta

Background Bariatric surgery offers a productive resolution of type 2 diabetes mellitus （T2DM）.The development of T2DM vasculopathy is due to chronic inflammation,which increases matrix metalloproteinase-9 （MMP-9） and tissue inhibitor of matrix metalloproteinase-1 （TIMP-1） expression.This study sought to examine MMP-9 and TIMP-1 expression in the thoracic aorta after duodenal-jejunal bypass （DJB） surgery on a T2DM rat model induced by a high-fat diet and low dose streptozotocin （STZ）.Methods Twenty-one T2DM Wistar rats induced by high-fat diet and low dose STZ were randomly divided into DJB and sham duodenal-jejunal bypass （S-DJB） groups.Ten Wistar rats were fed a normal diet as a control.Recovery of gastrointestinal function post-operation and resumption of a normal diet completed the experiment.Body weight,blood glucose,blood lipid levels,and MMP-9 and TIMP-1 expression levels in aortic endothelial cells were measured throughout.Results DJB rats showed significant weight loss 2 weeks post-operation compared with S-DJB rats.After surgery,DJB rats showed significant improvement and steady glycemic control with improved insulin sensitivity and glucose tolerance.They also exhibited improved lipid metabolism with a decrease in fasting free fatty acids （FFAs） and triglycerides （all P ＜0.05）.Immunohistochemistry showed decreased MMP-9 and TIMP-1 expression 12 weeks after surgery （P ＜ 0.01）.Conclusions DJB surgery on an induced T2DM rat model improves blood glucose levels and lipids,following a high-fat diet and low dose STZ treatment.In addition,DJB decreased MMP-9 and TIMP-1 expression in vascular endothelial cells,which may play an important role in delaying the development of T2DM vascular disease.

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 matrix metalloproteinase-2 and tissue inhibitor of metalloproteinase-1 in hepatic stellate cells during rat hepatic fibrosis and its intervention by IL-10

AIM: To investigate the expression of matrix metalloproteinase-2 and tissue inhibitor of metalloproteinase-1 in hepatic fibrosis and the antifibrogenic role of exogenous interleukin-10 (IL-10).METHODS: Hepatic fibrosis was induced by CCl4administration and 60 male Sprague-Dawley rats were randomly divided into normal control group (group N, 8rats), CCl4-induced group (group C, 28 rats) and IL-10-treated group (group I, 24 rats). At the beginning of the 7th and 11th wk, rats in each group were routinely perfused with pronase E and type Ⅳ collagenase through portal vein catheter and the suspension was centrifuged by 11%Nycodenz density gradient to isolate hepatic stellate cells (HSCs). RT-PCR was used to analyze mRNA of MMP-2 and TIMP-1 from freshly isolated cells. Densitometric data were standardized with β-actin signals. Immunocytochemistry was performed to detect MMP-2 and TIMP-1 expression in HSC cultured for 72 h.RESULTS: Compared to group N in the 7th wk, MMP-2and TIMP-1 mRNA increased in group C (P= 0.001/0.001)and group I (P = 0.001/0.009). The level of MMP-2 and TIMP-1 mRNA in group I was significantly lower than that in group C (P= 0.001/0.001). In the 11th wk, MMP-2 mRNAin group I was still lower than that in group C (P = 0.005),but both dropped compared with that in the 7th week (P = 0.001/0.004). TIMP-1 mRNA in group I was still lower than that in group C (P= 0.001), and increased in group C (P = 0.001) while decreased in group I (P = 0.042)compared with that in the 7th wk. Same results were found by immunocytochemistry.CONCLUSION: Expression of MMP-2 and TIMP-1 is increased in hepatic fibrosis. IL-10 exhibits an antifibrogenic effect by suppressing MMP-2 and TIMP-1 expression.

Expression of matrix metalloproteinase-1 and tissue inhibitor of metalloproteinase-1 in ulcerative colitis

AIM: To examine the expression of metalloproteinase-1 (MMP-1) and tissue inhibitor of metalloproteinase-1 (TIMP-1) in the colonic mucosa of patients with ulcer- ative colitis (UC). METHODS: Reverse transcription-polymerase chain re- action (RT-PCR) and immunohistochemistry were used to study the expression of MMP-1 and TIMP-1 at both mRNA and protein levels in patients with UC and con- trols. The relationship between MMP-1 mRNA, TIMP-1 mRNA, MMP-1 mRNA/TIMP-1 mRNA ratio and the sever- ity of clinical symptoms of the patients with UC were also analyzed. RESULTS: The expression of MMP-1 mRNA and TIMP-1 mRNA in the ulcerated and inflamed colonic mucosa was signifi cantly higher than that in the non-inflamed colonic mucosa (P < 0.001), but there was no statistically signif i- cant difference in the non-inflamed colonic mucosa of UC patients and normal controls (P > 0.05). The mRNA ex- pression of MMP-1 and TIMP-1 in ulcerated colonic mu- cosa of UC patients was increased by 80-fold and 2.2-fold, respectively when compared with the normal controls. In the inflamed colonic mucosa, the increase was 30-fold and 1.6-fold, respectively. Immunohistochemical analy- sis showed that among the ulcerated, inflamed, and non-inflamed colonic mucosae of UC patients and the normal controls, the positive rate of MMP-1 expression was 87%, 87%, 40% and 35% respectively, and the positive rate of TIMP-1 expression was 89%, 89%, 80% and 75%, respectively. Furthermore, the expression of MMP-1 mRNA, TIMP-1 mRNA and the MMP-1 mRNA/ TIMP-1 mRNA ratio were correlated with the severity of clinical symptoms (P <0.05).CONCLUSION: Excessive expression of MMP-1 in the diseased colonic mucosa causes excessive hydrolysis of the extracellular matrix (ECM) and ulceration in UC pa-tients. MMP-1 mRNA, TIMP-1 mRNA and MMP-1 mRNA/ TIMP-1 mRNA ratio can be used as biomarkers to judge the severity of clinical symptoms in patients with UC. Exogenous TIMP-1 or MMP-1 inhibitor therapy is a novel treatment for patients with UC.

Imbalance of matrix metalloproteinase-9 and matrix metalloproteinase tissue inhibitor-1 may contribute to hemorrhage in cerebellar arteriovenous malformations

In this study, we determined the expression levels of matrix metalloproteinase-2 and -9 and matrix metalloproteinase tissue inhibitor-1 and -2 in brain tissues and blood plasma of patients undergoing surgery for cerebellar arteriovenous malformations or primary epilepsy （control group）. Immunohistochemistry and enzyme-linked immunosorbent assay revealed that the expression of matrix metalloproteinase-9 and matrix metalloproteinase tissue inhibitor-1 was significantly higher in patients with cerebellar arteriovenous malformations than in patients with primary epilepsy. The ratio of matrix metalloproteinase-9 to matrix metalloproteinase tissue inhibitor-1 was significantly higher in patients with hemorrhagic cerebellar arteriovenous malformations compared with those with non-hemorrhagic malformations. Matrix metalloproteinase-2 and matrix metalloproteinase tissue inhibitor-2 levels were not significantly changed. These findings indicate that an imbalance of matrix metalloproteinase-9 and matrix metalloproteinase tissue inhibitor-I, resulting in a relative overabundance of matrix metalloproteinase-9, might be the underlying mechanism of hemorrhage of cerebellar arteriovenous malformations.

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.

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.

Correlation of matrix metalloproteinase－2, －9, tissue inhibitor－1 of matrix metalloproteinase and CD44 variant 6 in head and neck cancer metastasis

This study aimed to explore the molecular mechanism in tumor invasion and metastasis. The ex-pression of matrix metalloproteinase-2,-9 (MMP-2,MMP-9), tissue inhibitor-1 of matrix metalloprote inase(TIMP-1) , cell adhesion molecule 44 variant 6 (CD44v6) , HER2/neu and p53 was investigated in 154 pa-tients with head and neck squamous cell carcinoma (SCC) by ABC and ImmunoMax immunohistochemical method. Their clinical relevance and correlation were analysed. The expression of MMP-2, MMP-9, TIMP-1,CD44v6, HER2/neu and p53 was found in cancer cells in 87.01%, 85.71%, 68. 18%, 98.05%,55.19% and 50.65% cases respectively. Linear regression and correlation analysis revealed that there wasclose positive relationship ( P < 0.05) between the expression of MMP-2 and MMP-9, TIMP-1 and CD44v6,HER2/neu and MMP-9, MMP-2 and p53. Up-regulation of MMP-2 was accompanied by advanced T stage( P < 0.01 ) . There was also a trend of MMP-2 expression being related with tumor metastasis. Increased ex-pression of HER2/neu was found in patients with tumor recurrence( P < 0.05 ) . The expression of TIMP-1 washigher in laryngeal cancer than that in pharyngeal cancer, and higher in keratinizing and non-keratlnizing SCC than that in basaloid SCC ( P < 0.05 ) . These findings suggested that MMP-2 and MMP-9, HER2/neu andMMP-9, MMP-2 and p53 had a coordinate function in aggression of tumor; that MMP-2 had a more important function than MMP-9 in tumor invasion and metastasis; and that HER2/neu might serve as a biomarker forpoor prognosis in HNSCC.

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.

多西他赛联合PD-1抑制剂对晚期非小细胞肺癌预后及血清MMP-9、TIMP-1水平的影响

目的探讨多西他赛联合程序性死亡受体1(PD-1)抑制剂对晚期非小细胞肺癌(NSCLC)预后及血清基质金属蛋白酶-9(MMP-9)、基质金属蛋白酶组织抑制剂-1(TIMP-1)水平的影响。方法将90例晚期NSCLC患者随机分为研究组和对照组,每组45例。对照组给予多西他赛和顺铂治疗,研究组在对照组治疗基础上给予PD-1治疗,3周为1个治疗周期,共治疗6个周期。比较2组治疗后客观缓解率(ORR)、疾病控制率(DCR)、无进展生存期(PFS)、总生存期(OS),观察2组治疗期间不良反应发生情况及治疗前后血清MMP-9、TIMP-1水平的变化。结果研究组治疗后DCR、PFS、OS显著高于对照组(P<0.05);治疗期间2组不良反应发生率比较差异无统计学意义(P>0.05);2组治疗后血清MMP-9、TIMP-1水平较治疗前显著降低(P<0.05),且研究组降低较对照组更为显著(P<0.05)。结论多西他赛联合PD-1抑制剂对晚期NSCLC具有较好的疗效和预后,能够降低血清MMP-9、TIMP-1水平,降低肺癌细胞侵袭转移的能力,安全性良好。

虎黄烧伤搽剂联合常规疗法治疗Wagner 1-2级糖尿病足临床观察

目的探讨虎黄烧伤搽剂联合常规疗法治疗Wagner 1-2级糖尿病足的临床疗效。方法选取重庆医科大学附属大足医院2022年1月至2023年6月收治的Wagner 1-2级糖尿病足患者94例,按随机数字表法分为对照组和观察组,各47例。两组患者均予常规降糖药物,并以蚕食清创法清除坏死组织;观察组患者加用虎黄烧伤搽剂治疗。两组均连续治疗28 d。结果观察组疗效优于对照组(P<0.05);观察组糖尿病足感染率为2.13%,显著低于对照组的14.89%(P<0.05)。与对照组比较,观察组患者治疗第7,14,28天创面面积显著缩小,创面愈合时间显著缩短,创面组织中血管内皮生长因子(VEGF)、表皮生长因子(EGF)、基质金属蛋白酶抑制剂-1(TIMP-1)、转化生长因子-β(TGF-β)水平均显著升高,基质金属蛋白酶-9(MMP-9)水平显著降低(P<0.05)。结论虎黄烧伤搽剂联合常规疗法治疗Wagner 1-2级糖尿病足,可进一步上调创面组织中VEGF,EGF,TIMP-1,TGF-β水平,降低MMP-9水平,加速创面愈合。

CTA联合血清MMP-9、TIMP-1对脑梗死患者颈动脉斑块诊断价值

目的探究计算机断层扫描血管成像(CTA)联合血清基质金属蛋白酶-9(MMP-9)、基质金属蛋白酶组织抑制剂-1(TIMP-1)对脑梗死患者颈动脉斑块诊断价值。方法选取2021年5月-2021年12月期间我院神经内科收治的140例脑梗死患者作为试验组研究对象,另选择同期至我院进行体检的健康者80例作为参照组。试验组患者均行CTA和数字减影血管造影(DSA),分析CTA诊断颈动脉斑块价值。试验组和参照组均接受血清MMF-9 TIMP-1检测。对比试验组与参照组的血清MMP-9、TIMP-1水平差异。在试验组中,以DSA为金标准,将患者分为斑块组和无斑块组,对比两组之间的血清MMP-9、TIMP-1水平差异,对CTA联合血清MMP-9、TIMP-1诊断颈动脉斑块的效果进行受试者特征曲线(ROC)分析。结果CTA检测结果显示存在颈动脉斑块者64例,无斑块组76例,CTA诊断颈动脉斑块敏感度为96.88%,特异性为97.37%,准确度为97.14%;试验组血清MMP-9水平显著高于参照组(P<0.05),TIMP-1水平显著低于参照组(P<0.05);斑块组血清MMP-9水平显著高于无斑块组(P<0.05),TIMP-1水平显著低于无斑块组(P<0.05);ROC曲线显示血清CTA、MMP-9、TIMP-1水平单独及联合诊断颈动脉斑块AUC值依次为0.979、0.835、0.812和0.993。结论CTA联合血清MMP-9、TIMP-1对脑梗死患者颈动脉斑块具有良好的诊断价值。

脑脊液基质金属蛋白酶9水平和基质金属蛋白酶9/基质金属蛋白酶组织抑制剂1比值与结核性脑膜炎病情严重程度的相关性及对预后的预测价值研究

目的 探讨脑脊液基质金属蛋白酶9(MMP-9)水平和MMP-9/基质金属蛋白酶组织抑制剂1(TIMP-1)比值与结核性脑膜炎病情严重程度的相关性及对预后的预测价值。方法 选择2021年1月至2023年2月在湖南省胸科医院住院的结核性脑膜炎患者72例为观察组,以同期住院的非肿瘤非感染性头痛患者52例为对照组。比较2组患者脑脊液MMP-9水平和MMP-9/TIMP-1比值。根据改良的英国医学研究理事会结核性脑膜炎分期标准将观察组患者分为Ⅰ期组、Ⅱ期组、Ⅲ期组,比较3组患者MMP-9水平和MMP-9/TIMP-1比值。根据预后情况将观察组患者分为预后良好组和预后不良组,比较2组MMP-9水平和MMP-9/TIMP-1比值,并以受试者工作特征(ROC)曲线法评估各指标对结核性脑膜炎的预后预测价值。结果 观察组MMP-9水平及MMP-9/TIMP-1比值均大于对照组[(96±21)μg/L比(50±12)μg/L、(1.21±0.33)比(0.67±0.15)](均P<0.05),但2组间TIMP-1水平比较差异无统计学意义(P>0.05)。不同严重程度结核性脑膜炎患者MMP-9水平及MMP-9/TIMP-1比值差异均有统计学意义,且均呈Ⅰ期<Ⅱ期<Ⅲ期(均P<0.05);不同严重程度结核性脑膜炎患者TIMP-1水平差异均无统计学意义(均P>0.05)。相关性分析结果显示,结核性脑膜炎病情严重程度与MMP-9水平及MMP-9/TIMP-1比值均呈正相关(r=0.861、P=0.012;r=0.731、P=0.008),与TIMP-1无相关性(r=0.220,P=0.063)。预后不良组患者MMP-9水平及MMP-9/TIMP-1比值均高于预后良好组(均P<0.05),2组TIMP-1水平差异无统计学意义(P>0.05)。ROC曲线分析结果显示,MMP-9水平、MMP-9/TIMP-1比值预测结核性脑膜炎患者预后不良的截断值分别为112.04μg/L、1.41,曲线下面积分别为0.803、0.905(均P<0.05)。结论 结核性脑膜炎患者脑脊液MMP-9水平、MMP-9/TIMP-1比值明显升高,且MMP-9水平、MMP-9/TIMP-1比值与结核性脑膜炎的病情严重程度呈正相关,并可用于预测患者预后。

CTA联合血清MMP-9、TIMP-1在缺血性脑卒中诊断中的应用

目的 探究CT血管成像(CTA)联合血清基质金属蛋白酶9(MMP-9)、金属蛋白酶组织抑制因子1(TIMP-1)在缺血性脑卒中诊断中的应用。方法 选取2021年5月至2022年5月期间张家口市第一医院神经内科收治的140例脑卒中患者作为研究组研究对象,均行CTA检查,以数字血管造影(DSA)为金标准,分析CTA对缺血性脑卒中诊断价值,另选择同期至此院进行体检的健康者80名作为对照组,比较两组患者血清MMP-9、TIMP-1水平。结果 140例患者,共检查463条头颈血管,经CTA诊断无狭窄236条、轻度狭窄66条、中度狭窄36条、重度狭窄46条、闭塞22条,与DSA对照CTA诊断缺血性脑卒中患者血管狭窄程度的灵敏度为81.25%,特异度为90.15%;CTA诊断轻度狭窄患者74例、中度16例、重度46、闭塞4例,与DSA对照CTA诊断灵敏度82.50%、特异度83.33%;研究组患者血清MMP-9、TIMP-1表达水平均显著高于对照组患者,差异有统计学意义(t=73.668、33.925,P<0.05),且研究组患者随着狭窄程度增加,血清MMP-9、TIMP-1水平逐渐上升,差异有统计学意义(F=13298.37、901.001,P<0.05);MMP-9以247.14 ng/mL为临界值,阳性53例,阴性87例;TIMP-1均值(239.21 ng/mL)为临界值,阳性53例,阴性87例;以CTA阳性为基础,MMP-9、TIMP-1任一指标阳性则定义为联合诊断阳性,结果显示联合诊断灵敏度为88.75%,特异度为80.00%。结论 CTA联合血清MMP-9、TIMP-1对缺血性脑卒中诊断效能较高,临床应在密切观察缺血性脑卒中患者CTA检查基础上联合MMP-9、TIMP-1水平检测。

EPO、IL-1β、MMP-9/TIMP-1与烧伤患者瘢痕评分、创面愈合时间关系及对创面愈合质量的预测价值

目的:探讨促红细胞生成素(Erythropoietin,EPO)、白介素-1β(Interleukin-1β,IL-1β)、基质金属蛋白酶-9/基质金属蛋白酶抑制剂-1(Matrix metalloproteinase-9/Tissue inhibitor of metalloproteinase-1,MMP-9/TIMP-1)与烧伤患者瘢痕评分、创面愈合时间关系及对创面愈合质量的预测价值。方法:选取2018年5月-2021年1月笔者科室收治的113例深Ⅱ度烧伤患者,采用削痂植皮联合外用重组人粒细胞-巨噬细胞刺激因子治疗,根据创面愈合质量分为良好组(n=88)、不良组(n=25),比较两组基线资料及治疗前、治疗5 d、10 d后EPO、IL-1β、MMP-9/TIMP-1,应用Pearson分析治疗5 d、10 d后EPO、IL-1β、MMP-9/TIMP-1与温哥华瘢痕量表(Vancouver scar scale,VSS)、创面愈合时间关系,采用多因素Logistic回归方程分析创面愈合质量的相关影响因素,采用受试者工作特征曲线(Receiver operating characteristic,ROC)及ROC下面积(Area under the curve,AUC)分析治疗5 d、10 d后EPO、IL-1β、MMP-9/TIMP-1,预测创面愈合质量价值。结果:不良组创面愈合时间、VSS评分数值均高于良好组(P<0.05);不良组治疗5 d、10 d后EPO低于良好组,IL-1β、MMP-9/TIMP-1高于良好组,差异均有统计学意义(P<0.05);治疗5 d、10 d后EPO与VSS评分、创面愈合时间呈负相关(P<0.05);治疗5 d、10 d后IL-1β、MMP-9/TIMP-1与VSS评分、创面愈合时间呈正相关(P<0.05);将创面愈合时间、VSS评分控制后,治疗5 d、10 d后EPO、IL-1β、MMP-9/TIMP-1仍与创面愈合质量相关(P<0.05);治疗10 d后EPO、IL-1β、MMP-9/TIMP-1的AUC大于治疗5 d后,且EPO、IL-1β联合MMP-9/TIMP-1的AUC大于任一单一指标。结论:EPO、IL-1β、MMP-9/TIMP-1与烧伤患者瘢痕评分、创面愈合时间、创面愈合质量有关,联合检测能为临床预测创面质量提供有效参考,并有望成为促进创面愈合、提高愈合质量的一个干预靶点。

超脉冲CO_(2)激光联合磁敷疗法治疗浅表型增殖期婴幼儿血管瘤的临床效果及其对患儿血清EGFL7、HIF-1α、MMP9、TIMP-1水平的影响

目的探讨超脉冲CO_(2)激光联合磁敷疗法治疗浅表型增殖期婴幼儿血管瘤(IH)的临床效果及其对患儿血清表皮生长因子样结构域蛋白7(EGFL7)、缺氧诱导因子1α(HIF-1α)、基质金属蛋白酶9(MMP9)、组织金属蛋白酶抑制剂1(TIMP-1)水平的影响。方法将110例浅表型增殖期IH患儿随机分成观察组与对照组,各55例。观察组采用超脉冲CO_(2)激光联合磁敷疗法治疗,对照组采用单纯超脉冲CO_(2)激光治疗。比较两组患儿近期与远期治疗有效率,以及治疗前后的血清EGFL7、HIF-1α、MMP9、TIMP-1水平,观察两组患儿治疗期间不良反应的发生情况。结果观察组近期治疗有效率与远期治疗有效率均高于对照组(均P<0.05)。治疗后,两组患儿的血清EGFL7、HIF-1α、MMP9水平均低于治疗前,且观察组患儿的上述指标水平均低于对照组(均P<0.05);两组患儿的血清TIMP-1水平均高于治疗前,且观察组患儿的血清TIMP-1水平高于对照组(均P<0.05)。两组患儿治疗期间局部肿胀、局部红斑、色素沉着的发生率比较,差异均无统计学意义(均P>0.05)。结论相比于单纯超脉冲CO_(2)激光治疗,超脉冲CO_(2)激光联合磁敷疗法可提高浅表型增殖期IH患儿的治疗效果,安全性较高,其机制可能与调节血清EGFL7、HIF-1α、MMP9和TIMP-1水平有关。

Effects of Fengbaisan(丰白散) on the Expression of Matrix Metalloproteinase-9 and Tissue Inhibitor of Metalloproteinase-1 in Lung Tissue of Rats with Chronic Obstructive Pulmonary Disease

Objective： To observe effects of Fengbaisan （丰白散, FBS） on the expression of matrix metalloproteinase-9 （MMP-9） and tissue inhibitor of metalloproteinase-1 （TIMP-1） in lung tissue of rats with chronic obstructive pulmonary disease （COPD） and to investigate the preventive and therapeutic mechanisms of FBS. Methods： The COPD rat model was established by cigarette smoke exposure and lipopolysaccharide （LPS） intra-tracheal dripping. The histopathological changes of lung tissue was observed via hematoxylin/eosin staining. The expression of MMP-9 and TIMP-1 in lung tissue was measured by reverse transcription polymerase chain reaction （RT-PCR） and immunohistochemistry. Results： The typical histopathological changes of COPD were displayed in the model group, Ambroxol Hydrochloride group and FBS group, and the pathological lesions in the FBS group were less than those in the model group. The expression of MMP-9 and TIMP-1 in the model group increased significantly compared with those in the normal group （P〈0.05）. After treatment for successive 28 days, the expression of MMP-9 and TIMP-1 in the FBS group decreased remarkably as compared with the model group （P〈0.05）. Conclusions： FBS can regulate MMP-9/TIMP-1 imbalance to prevent airway and lung parenchyma remodeling process via reducing the expression of MMP-9 and TIMP-1 in the lung tissue of COPD rats, and this may be a possible therapeutic mechanism of FBS on COPD. KEYWORDS chronic obstructive pulmonary disease, Fengbaisan, matrix metalloproteinase-9, tissue inhibitor of metalloproteinase-1, airway remodeling, Chinese medicine

Increased expression of matrix metalloproteinase-9 associated with gastric ulcer recurrence

AIM: To compare matrix metalloproteinase (MMP)-9 and tissue inhibitor of metalloproteinase (TIMP)-1 in gastric ulcer (GU) and chronic superficial gastritis (CSG). METHODS: This study enrolled 63 patients with GU and 25 patients with CSG. During upper gastroduodenal endoscopy, we took samples of gastric mucosa from the antrum and ulcer site from patients with GU, and samples of antral mucosa from patients with CSG. Mucosal biopsy tissues were cultured for 24 h, and the culture supernatant was measured for levels of MMP-9 and TIMP-1. After receiving eradication therapy for Helicobacter pylori (H. pylori ) and 8 wk proton-pump inhibitor therapy for GU, follow-up endoscopy examination was performed after 6 mo and whenever severe symptoms occurred. RESULTS: Levels of MMP-9 and TIMP-1 at the ulcer site or in the antrum were significantly higher in GU than CSG patients. MMP-9 levels at the ulcer site were significantly higher than in the antrum in GU patients, and had a significantly positive correlation with TIMP-1. MMP-9 levels were significantly higher in H. pylori -positive than H. pylori -negative GU and CSG patients. Levels of MMP-9 or TIMP-1 at the ulcer site were associated with the histological severity of activity and inflammation. About 57 GU patients were followed up, and seven had GU recurrence. H. pyloriinfection and MMP-9 levels were risk factors for the recurrence of GU adjusted for age and sex by multiple logistic regression analysis. CONCLUSION: MMP-9 may perform an important function in gastric ulcer formation and recurrence.