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.

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.

Preparation and in vitro studies of microencapsulated cells releasing human tissue inhibitor of metalloproteinase-2

Objective: To prepare microencapsulated cells releasing human tissue inhibitor ofmetalloproteinase-2 (TIMP-2), and investigate their biological characteristics in vitro. Methods: Chinese hamster ovary (CHO) cells were stably transfected with a human TIMP-2 expression vector, encapsulated in barium alginate microcapsules and cultured in vitro. Morphological appearance of the microcapsules was observed under a light microscope. Cell viability was assessed using MTT (3-(4,5-dimethylthiazol2-yl)-2,5-diphenyltetrazolium bromide) assay. Enzyme linked immunosorbent assay (ELISA) and reverse zymography were used to confirm the release of biologically active TIMP-2 from the microcapsules. Cryopreservation study of the microencapsulated cells was carried out using dimethyl sulfoxide (DMSO) as preservative agent. Results: The microcapsules appeared like a sphere kept proliferating over the 6 weeks observed. No significant difference in TIMP-2 secretion was found between encapsulated and unencapsulated cells. Reverse zymography confirmed the bioactivity of MMP (matrix metalloproteinase) inhibition of TIMP-2.The cryopreservation process did not damage the microcapsule morphology nor the viability of the cells inside. Conclusion:Microencapsulated engineered CHO cells survive at least 6 weeks after preparation in vitro, and secrete bioactive TIMP-2 freely from the microcapsules.

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.

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.

Expression of Matrix Metalloproteinase and Its Tissue Inhibitor in Haemangioma

The action mechanism of matrix metalloproteinases-2 （MMP-2） and tissue inhibitor of metalloproteinases-2 （TIMP-2） in the genesis, development and degeneration of haemangioma was investigated by detecting their expression in the tissue of haemangioma in different phases by using the immunohistochemistry. Fifty paraffin-embedded specimens of skin capillary haemangioma were collected, which were documented in the Department of Pathology, Renmin Hospital of Wuhan University from 2000 to 2006. All samples were stained by regular HE method, and proliferative cell nuclear antigen （PCNA） was tested by immunohistochemical S-P method. The samples were classified according to the Mulliken criteria and the expression pattern of PCNA. Immunohistochemical S-P method was ap- plied to detect the expression of MMP-2 and TIMP-2 in proliferative and degenerative phases of cutaneous capillary haemangioma, and in normal skin tissues. In combination with the detection of the expression of factor Ⅷ-related antigen, it was verified that in haemangioma tissues, the cells expressing MMP-2 and TIMP-2 were vascular endothelial cells. The MMP-2 and TIMP-2 expression was quantitatively analyzed by image analysis system （HPIAS-1000）, and one-way ANOVA（107） and SNK（q） test were done to analyze average absorbance （A） and positive area rate of immunohistochemically positive particles by using SPSS11.5. The results showed： （1） Among 50 samples of haemangioma, there were 26 proliferative haemangiomas, and 24 degenerative haemangiomas, respectively; （2） The expression of MMP-2 was weak in normal vascular endothelial cells, cytoplasm of connective tissues and extracellular matrix around blood vessels. The expression of MMP-2 in proliferative group was significantly higher than in degenerative group and control group （normal skin） （P〈0.05）, but there was no statistically significant difference between the latter two groups; （3） TIMP-2 was highly expressed in normal tissues, degenerative vascular endothelial cells, cytoplasm of connective tissues and extracellular matrix around blood vessels. The expression level of TIMP-2 in proliferative phase was significantly lower than in degenerative phase （P〈0.05）, and the expression of TIMP-2 in proliferative phase was significantly different from that in degenerative phase and normal tissues （P〈0.05）. It was concluded that in proliferative phase of haemangioma, MMP-2 may promote over-proliferation of endothelial cells of haemangioma, and in degenerative phase, TIMP-2 can inhibit the proliferation of endothelial cells of haemangioma. The two substances play important roles in the genesis, development and degeneration of haemangiomas.

Occurrence of Two Distinct types of Tissue Inhibitors of Metallo-proteinases-2 in Fugu rubripes

In this study, genes of two distinct tissue inhibitors of metalloproteinases-2 (TIMP-2) from Japanese puffer fishFugu rubripes, Fugu TIMP-2a and TIMP-2b, were cloned. The open reading frames of Fugu TIMP-2a and TIMP-2b cDNAsare composed of 660 and 657 nucleotides and 220 and 219 amino acids, respectively. Both Fugu TIMP-2s contain 12 cysteineresidues, which might form six disulfide bonds as in other animals’ TIMP-2s. Reverse-transcribed polymerase chain reactionanalysis showed the mRNAs of Fugu TIMP-2a and TIMP-2b to be expressed in some tissues examined with different expres-sion patterns. These findings suggest that the two distinct Fugu TIMP-2s might perform different functions in Fugu tissues.

重度烧伤患者入院时尿[TIMP-2]×[IGFBP7]水平与早期肾损伤的关系

目的 探讨重度烧伤患者入院时尿组织金属蛋白酶抑制剂-2[TIMP-2]×胰岛素样生长因子结合蛋白7[IGFBP7]水平与早期肾损伤的关系。方法 选取2018年11月—2022年6月本院收治的77例重度烧伤患者设为重度组、77例轻中度烧伤患者设为轻中度组,另选取同期77例体检正常者为正常组。比较3组尿[TIMP-2]×[IGFBP7]水平及血清胱抑素C(CysC)水平。根据重度烧伤患者在住院期间是否发生肾早期损伤分为非肾损伤组(45例)和肾损伤组(32例),比较非肾损伤组、肾损伤组重度烧伤患者尿[TIMP-2]×[IGFBP7]水平及血清CysC水平。分析入院时尿[TIMP-2]×[IGFBP7]、血清CysC对重度烧伤患者并发肾损伤的预测价值。结果 重度组烧伤患者尿[TIMP-2]×[IGFBP7]水平及血清CysC水平高于正常组、轻中度组(P<0.05),轻中度组烧伤患者尿[TIMP-2]×[IGFBP7]水平及血清CysC水平高于正常组(P<0.05)。肾损伤组重度烧伤患者尿[TIMP-2]×[IGFBP7]、血清CysC水平高于非肾损伤组(P<0.05)。入院时尿[TIMP-2]×[IGFBP7]、血清CysC预测重度烧伤患者并发肾损伤的AUC分别为0.873、0.699,截断值分别为1.06 [(ng/mL)^(2)/1000]、5.52 mmol/L,灵敏度分别为84.4%、59.4%,特异度分别为89.9%,73.3%。结论 发生早期肾损伤的重度烧伤患者入院时尿[TIMP-2]×[IGFBP7]水平及血清CysC水平较高,[TIMP-2]×[IGFBP7]水平或可成为预测重度烧伤患者并发肾损伤的潜在指标,为临床评估重度烧伤并发肾损伤提供参考。

前列腺突入膀胱程度及尿TIMP-2水平与前列腺增生患者膀胱出口梗阻严重程度的相关性分析

目的研究前列腺突入膀胱程度(Intravesical prostatic protrusion,IPP)及尿金属蛋白酶组织抑制剂-2(Tissue inhibitor of metalloproteinase-2,TIMP-2)与前列腺增生患者膀胱出口梗阻(Bladder outlet obstruction,BOO)严重程度的相关性。方法收集99例良性前列腺增生(Benign prostatic hyperplasia,BPH)患者纳入本研究,收集患者临床资料,检测患者IPP及尿TIMP-2,对患者进行尿动力学检测。根据国际前列腺症状评分(International prostate symptom score,IPSS)将患者分为3组,0~7评分为轻度组,共42例,8~19分为中度组,共25例,20~35分为重度组,共32例。采用Logistic回归分析3组患者的临床资料、IPP、尿TIMP-2、膀胱出口梗阻指数(Bladder outlet obstruction,BOOI)的相关性。采用受试者工作特征曲线(Receiver operating characteristic,ROC)分析IPP、TIMP-2检测预测BOO的敏感性。结果使用单因素方差分析法分析3组患者的临床指标,随着患病程度加重,年龄、TPV、IPSS、IPP、尿TIMP-2水平均有增加趋势,尿动力学指标中Qmax下降,Pdet.Qmax、BOOI、PVR均升高,且差异具有统计学意义(P均<0.05)。相关性分析结果显示,3组患者BOOI与年龄、BMI、TPV、PVR无显著相关性(P均>0.05)。轻度组、中度组和重度组患者BOOI与IPP、尿TIMP-2以及IPSS均呈正相关(P均<0.05)。ROC曲线分析显示IPP与尿TIMP-2单独预测BOO均具有较强敏感性,IPP联合尿TIMP-2检测敏感性更高(P均<0.05)。结论IPP、尿TIMP-2与前列腺增生患者BOO严重程度具有相关性,且IPP联合尿TIMP-2预测BOO具有较高敏感性。

Effects of hypoxia,hyperoxia on the regulation of expression and activity of matrix metalloproteinase-2 in hepatic stellate cells

AIM To study the effects of hypoxia, hyperoxia on the regulation of expression and activity of matrix metalloproteinase-2 (MMP-2) in hepatic stellate cells ( HSC).``METHODS The expressions of MMP-2, tissue inhibitor of mjatrix metalloproteinese-2 ( TIMP-2 ) and membrane type matrix metalloproteiness-l (MT1-MMP) in cultured rat HSC were detected by immunocytochemistry (ICC) and in situ hybridization (ISH). The contents of MMP-2 and TIMP-2 in culture supernatant were detected with ELISA and the activity of MMP-2 in supematant was revealed by zymography.``RESULTS In the situation of hypoxia for 12 h, the expression of MMP-2 protein wss enhenced (hypoxiagroup positive indexes: 5.7 ± 2.0, n = 10; control: 3.2 ±1 .0. n -- 7; P＜0.05). while TIMP-2 protein wss decreased in HSC ( hypoxia group positive indexes: 2.5 ± 0.7, n =10: control: 3.6 ± 1.0, n = 7; P＜O.05), and the activity ( total A) of MMP-2 in supematant declined obviously (hypoxia group: 7.334 ± 1.922, n = 9; control: 17.277 ±7.424. n= 11; P＜0.01). Compared the varied duration of hypoxia, the changes of expressions including mRNA and protein level as well as activity of MMP-2 were most notable in 6 h group. The highest value (Ahypoxia-Acontrol) ofthe protein and the most intense signal of mRNA were in the period of hypoxia for 6 h, along with the lowest activity of MMP-2. In the situation of hyperoxia for 12 h,the contonts (A450) of MMP-2 and TIMP-2 in supernatant were both higher then those in the control, especially the TIMP-2 (hyperoxia group: 0.0499 _+ 0.0144, n = 16;control: 0.0219 ± 0.0098, n = 14; P＜0.01), and so was the activity of MMP-2 (hyperoxia group: 5.252 _+ 0.771,n: 14; control: 4.304 +_ 1 .083, n = 12; P＜0.05), and the expression of MT1-MMP was increased.``CONCLUSION HSC Js sensitive to the oxygen, hypoxia enhances the expression of MMP-2 and the effect is more marked at the early stage; hyperoxia mainly raises the activity of MMP-2.

2型糖尿病合并冠心病患者TIMP-4、FFA水平和EAT厚度与颈部血管病变相关性分析

【目的】探讨2型糖尿病(T2DM)合并冠心病(CHD)患者组织型金属蛋白酶抑制剂4(TIMP-4)、游离脂肪酸(FFA)水平及心外膜脂肪组织(EAT)厚度与颈部血管病变相关性。【方法】选取2019年5月至2022年5月在本院行冠脉造影检查诊断为T2DM合并CHD的158例患者,根据是否存在颈部血管病变分为非颈部血管病变组(n=90)、颈部血管病变组(n=68)。收集并比较两组患者临床资料;采用酶联免疫吸附法(ELSA)检测两组患者血清TIMP-4、FFA水平;使用超声心动图测量EAT厚度;采用多因素Logistic回归分析T2DM合并CHD患者发生颈部血管病变的危险因素;采用受试者工作特征(ROC)曲线评估血清TIMP-4、FFA水平及EAT厚度对T2DM合并CHD患者发生颈部血管病变的诊断价值。【结果】与非颈部血管病变组比较,颈部血管病变组患者血清TIMP-4水平降低(P<0.05),FFA水平及EAT厚度升高(P<0.05);多因素Logistic回归分析显示:TIMP-4水平降低、FFA水平及EAT厚度升高是T2DM合并CHD颈部血管病变的危险因素(OR=3.968、2.587、4.125,均P<0.05);血清TIMP-4、FFA水平及EAT厚度联合诊断T2DM合并CHD患者发生颈部血管病变的AUC分别为0.753、0.506、0.856、0.915,灵敏度分别为83.10%、70.69%、83.1%、85.77%,特异度分别为85.60%、62.87%、89.6%、82.96%。【结论】血清TIMP-4、FFA水平及EAT厚度联合检测对T2DM合并CHD患者发生颈部血管病变有一定的诊断价值,可为临床早期诊治T2DM合并CHD颈部血管病变提供一定参考。

尿液胰岛素样生长因子结合蛋白-7与金属蛋白酶组织抑制剂-2在脓毒症急性肾损伤中的应用价值

目的分析尿液胰岛素样生长因子结合蛋白-7(IGFBP-7)和金属蛋白酶组织抑制剂-2(TIMP-2)在脓毒症急性肾损伤(AKI)中的早期预测价值。方法选取2020年1月—2021年12月山西省人民医院急诊科监护室收治的脓毒症患者58例,并根据KDIGO的诊断标准分成脓毒症AKI组22例和非AKI组36例。分别在入组后0 h、24 h、48 h、72 h采集患者尿液及血液标本,并检测血肌酐(SCr)与尿IGFBP-7、TIMP-2水平。分析SCr、尿IGFBP-7、TIMP-2与脓毒症AKI的相关性。受试者工作特征曲线(ROC)分析SCr、尿IGFBP-7及TIMP-2在脓毒症早期急性肾损伤中的诊断价值。结果与非AKI组比较,AKI组各时点SCr、尿IGFBP-7、尿TIMP-2水平均升高,差异具有统计学意义(F/P=147.848/<0.001、330.849/<0.001、136.777/<0.001)。SCr与尿IGFBP-7、尿TIMP-2均呈正相关(r/P=0.680/<0.001,0.392/0.002),尿IGFBP-7与尿TIMP-2呈正相关(r/P=0.618/<0.001)。ROC曲线分析显示,SCr、尿IGFBP-7、尿TIMP-2及尿IGFBP-7联合TIMP-2预测脓毒症AKI的曲线下面积(AUC)分别为0.586、0.907、0.738、0.914,尿IGFBP-7、尿IGFBP-7联合TIMP-2优于SCr(Z/P=4.117/<0.001,4.196/<0.001);尿IGFBP-7、尿IGFBP-7联合TIMP-2优于尿TIMP-2(Z/P=2.663/0.008,3.378/0.008)。结论尿IGFBP-7、尿TIMP-2与尿IGFBP-7联合TIMP-2均可以作为早期预测脓毒症急性肾损伤发生的指标,且尿IGFBP-7、尿IGFBP-7联合TIMP-2的预测价值优于尿TIMP-2。

血清TIMP-2、PLGF与高龄子痫前期患者胎儿生长受限的关系

目的 分析血清基质金属蛋白酶抑制因子(TIMP)-2、胎盘生长因子(PLGF)与高龄子痫前期(PE)患者发生胎儿生长受限(FGR)的关系。方法 采用前瞻性队列研究法选取2020年3月至2022年2月于新疆医科大学第一附属医院产检的138例高龄PE患者作为研究对象,纳入PE组;另选取同期在同一医院接受产检的138例高龄孕妇作为对照组。检查所有研究对象的肝肾功能[血肌酐(Scr)、谷丙转氨酶(ALT)、谷草转氨酶(AST)]、孕激素及血清TIMP-2、PLGF等。统计患者FGR发生情况,并分为FGR组和N-FGR组,采用Logistic回归分析血清TIMP-2、PLGF与高龄PE患者发生FGR的关系。结果 PE组血清TIMP-2水平高于对照组,血清PLGF水平低于对照组,差异均具有统计学意义(P<0.05)。138例高龄PE患者发生流产8例,胎停3例,退出研究2例,最终125例患者获得随访结果,胎儿娩出时确诊为FGR 27例。FGR组收缩压(SBP)、舒张压(DBP)、Scr及血清ALT、AST、TIMP-2水平均高于N-FGR组,血清PLGF水平低于N-FGR组,差异均具有统计学意义(P<0.05)。Logistic回归分析结果显示,血清TIMP-2高表达、PLGF低表达与高龄PE孕妇发生FGR有关(P<0.05)。结论 FGR患者血清TIMP-2显著升高,而PLGF水平显著降低;血清TIMP-2高表达、PLGF低表达是导致高龄PE孕妇FGR风险增加的危险因素。

乙型肝炎肝硬化并发急性肾损伤患者血清和尿液NGAL、IGFBP7和TIMP-2水平变化及其临床意义探讨

目的 探讨乙型肝炎肝硬化并发急性肾损伤(AKI)患者血清和尿液中性粒细胞明胶酶原相关蛋白(NGAL)、胰岛素样生长因子结合蛋白7(IGFBP7)和金属蛋白酶组织抑制剂-2(TIMP-2)变化及其临床意义。方法 2020年3月~2022年12月我院收治的119例乙型肝炎肝硬化患者(并发AKI者38例,其中1期15例、2期14例和3期9例)和54例健康体检者,采用ELISA法检测血清NGAL水平及尿液NGAL、IGFBP7和TIMP-2水平。应用Cox单因素和多因素Logistic回归分析影响乙型肝炎肝硬化并发AKI的危险因素。结果 AKI组血清NGAL水平及尿液NGAL、尿液TIMP-2和IGFBP7水平分别为(371.7±60.2)μg/L、(59.7±7.3)μg/L、(3.3±0.6)ng/mL和(98.3±19.5)ng/mL,显著高于肝硬化组【分别为(82.3±15.7)μg/L、(10.7±2.5)μg/L、(2.4±0.5)ng/mL和(85.0±18.2)ng/mL,P<0.05】或健康人【分别为(46.5±10.9)μg/L、(7.9±1.2)μg/L、(0.7±0.1)ng/mL和(16.1±3.7)ng/mL,P<0.05】;AKI 3期患者血清NGAL水平及尿液NGAL、尿液TIMP-2和IGFBP7水平分别为(552.7±63.5)μg/L、(81.9±13.7)μg/L、(4.0±0.7)ng/mL和(110.4±15.1)ng/mL,显著高于1期患者【分别为(249.5±50.7)μg/L、(45.7±11.9)μg/L、(2.8±0.6)ng/mL和(90.3±10.9)ng/mL,P<0.05】或2期患者【分别为(386.3±59.8)μg/L、(60.4±9.5)μg/L、(3.4±0.7)ng/mL和(99.1±12.7)ng/mL,P<0.05】;本组并发AKI患者90 d生存率为57.9%;死亡组Child-Pugh C级、AKI 3期、肝性脑病、感染和上消化道出血患者占比显著高于生存组,血清NGAL水平及尿液NGAL、尿液TIMP-2和IGFBP7水平也显著高于生存组(P<0.05);多因素分析发现,Child-Pugh C级、AKI 3期、肝性脑病和上消化道出血及尿液NGAL和IGFBP7水平升高为乙型肝炎肝硬化并发AKI患者死亡的危险因素(P<0.05)。结论 乙型肝炎肝硬化并发AKI患者血清NGAL水平及尿液NGAL、TIMP-2和IGFBP7水平变化与病情严重程度有关,且尿液NGAL和IGFBP7水平显著升高为短期死亡的危险因素。

尿液TIMP-2、IGFBP-7在老年急性肾损伤患者中的临床诊断预后价值研究

目的探究尿液金属蛋白酶组织抑制剂-2(TIMP-2)、胰岛素样生长因子结合蛋白-7(IGFBP-7)预测老年急性肾损伤(AKI)的价值及与预后的关系。方法选取2021年6-10月开滦总医院重症监护病房(ICU)住院的老年患者112例,统计入住ICU 24 h后3 d内AKI的发生情况,将患者分为AKI组、非AKI组,比较两组一般资料、入住ICU 12 h内动脉血氧分压(PaO 2)、动脉血二氧化碳分压(PaCO 2)、天门冬氨酸氨基转移酶(AST)、降钙素原(PCT)、血肌酐(SCr)水平及入住ICU即刻、4、12、24 h尿[TIMP-2]×[IGFBP-7],采用Spearman相关系数模型分析各时间点尿[TIMP-2]×[IGFBP-7]与AKI发生的相关性,通过受试者工作特征(ROC)曲线分析各时间点尿[TIMP-2]×[IGFBP-7]预测AKI发生的价值,以AKI组患者死亡和血液滤过为复合终点事件,运用Cox比例风险回归模型分析各时间点尿[TIMP-2]×[IGFBP-7]与复合终点事件的关联性。结果112例老年患者入住ICU 24 h后AKI发生率为25.89%;AKI组入住ICU 4、12、24 h尿[TIMP-2]×[IGFBP-7]均高于非AKI组,差异有统计学意义(P<0.05);入住ICU 4、12、24 h尿[TIMP-2]×[IGFBP-7]与AKI的发生呈正相关(r=0.312、0.479、0.635,均P<0.05);入住ICU 4、12、24 h尿[TIMP-2]×[IGFBP-7]预测AKI发生的曲线下面积(AUC)分别为0.739(95%CI为0.647~0.817)、0.798(95%CI为0.712~0.868)、0.818(95%CI为0.733~0.884);发生复合终点事件患者入住ICU 4、12、24 h尿[TIMP-2]×[IGFBP-7]均高于未发生复合终点事件患者,差异有统计学意义(P<0.05);入住ICU 4、12、24 h尿[TIMP-2]×[IGFBP-7]均是复合终点事件的发生的影响因素(P<0.05)。结论尿液生物标志物[TIMP-2]×[IGFBP-7]与AKI的发生显著相关,入住ICU 24 h内监测尿[TIMP-2]×[IGFBP-7]有助于预测AKI发生风险,且与发生AKI患者的预后密切相关。

盐酸氨基葡萄糖联合氟比洛芬对增生性膝骨关节炎患者高迁移率族蛋白B1人类成纤维生长因子-2组织金属蛋白酶抑制剂-1水平的影响

目的 探讨盐酸氨基葡萄糖联合氟比洛芬对增生性膝骨关节炎患者高迁移率族蛋白B1(HMGB1)、人类成纤维生长因子-2(FGF-2)、组织金属蛋白酶抑制剂-1(TIMP-1)水平的影响。方法 选取2021年6月至2023年1月陆军第七十二集团军医院确诊增生性膝骨关节炎患者100例,采用随机数字表法分为对照组和观察组各50例,对照组接受盐酸氨基葡萄糖治疗,观察组联合应用氟比洛芬治疗,2组连续治疗6周。比较2组临床疗效,比较2组视觉模拟评分法(VAS)、Lysholm膝关节评分系统(LKSS)、西安大略和麦克马斯特大学骨关节炎指数(WOMAC)评分、HMGB1、FGF-2、TIMP-1水平、不良反应发生率。结果 与对照组(74%)比较,观察组临床总有效率(90%)升高(P<0.05);与治疗前比较,治疗后2组VAS、WOMAC评分降低,LKSS评分升高,并且观察组VAS、WOMAC评分低于对照组,LKSS评分高于对照组(P<0.05);治疗后2组HMGB1水平比治疗前降低,FGF-2、TIMP-1水平升高,并且观察组HMGB1低于对照组,FGF-2、TIMP-1水平高于对照组(P<0.05);2组不良反应发生率比较,差异无统计学意义(P>0.05)。结论 盐酸氨基葡萄糖联合氟比洛芬能够有效治疗增生性膝骨关节炎,同时还能降低HMGB1水平,升高FGF-2、TIMP-1水平,且不良反应少,具有较高的临床参考价值。

血清MMP2/TIMP2比值与老年2型糖尿病患者并发AS的相关性分析

目的探讨血清基质金属蛋白酶-2/金属蛋白酶组织抑制因子-2(MMP2/TIMP2)比值与老年2型糖尿病(T2DM)患者并发主动脉硬化(AS)之间的关系。方法回顾性分析2022年1月至2023年4月万宁市人民医院收治的180例初次诊断为T2DM的老年患者的临床资料,并根据是否并发AS[颈动脉-股动脉脉搏波传导速度(cfPWV)>10 m/s]分为AS组(n=69)和非AS组(n=111)。另选取同时期来院体检健康者采用倾向性评分法匹配90例为对照组。比较3组对象的一般资料、实验室指标以及血清MMP2、TIMP2水平和MMP2/TIMP2比值。采用Spearman相关分析探究老年T2DM患者cfPWV与各项指标的相关性。采用多因素logistic回归模型分析,老年T2DM患者并发AS的影响因素。绘制受试者工作特征(ROC)曲线,分析并比较MMP2/TIMP2比值与多指标联合检测对老年T2DM患者并发AS的诊断价值。结果非AS组稳态模型胰岛素抵抗指数(HOMA-IR)、血清三酰甘油(TG)、MMP2水平及MMP2/TIMP2比值高于对照组,血清TIMP2水平低于对照组,差异有统计学意义(P<0.05)。AS组年龄、合并高血压比例高于非AS组(P<0.05)。AS组HOMA-IR、血清TG、MMP2水平及MMP2/TIMP2比值高于对照组和非AS组,血清TIMP2水平低于对照组和非AS组,差异均有统计学意义(P<0.05)。相关性分析结果显示,非AS组患者的cfPWV与HOMA-IR、TC、LDL-C、MMP2、MMP2/TIMP2比值呈正相关(r=0.217、0.264、0.216、0.197、0.703,P<0.05),与TIMP2呈负相关(r=-0.524,P<0.01);AS组患者cfPWV与MMP2、MMP2/TIMP2比值呈正相关(r=0.659、0.857,P<0.01),与TIMP2呈负相关(r=-0.532,P<0.01)。logistic回归分析显示,年龄增长(OR=1.108,95%CI:1.022~1.201,P=0.012)、高血压病(OR=2.877,95%CI:1.174~7.051,P=0.021)及MMP2/TIMP2比值升高(OR=5.147,95%CI:2.392~11.074,P<0.001)是老年T2DM患者并发AS的的独立危险因素。ROC曲线分析结果显示,MMP2/TIMP2比值及多指标联合检测诊断老年T2DM患者并发AS的曲线下面积分别为0.850(95%CI:0.789~0.899,P<0.01)和0.886(95%CI:0.831~0.929,P<0.01),灵敏度分别为73.91%、82.61%,特异度分别为89.19%、82.88%,约登指数分别为0.631、0.655。多指标联合检测的诊断效能明显大于MMP2/TIMP2比值,差异具有统计学意义(Z=2.233,P=0.026)。MMP2/TIMP2比值诊断老年T2DM患者并发AS的最佳截断值为3.23。结论MMP2/TIMP2比值升高为老年T2DM患者并发AS的独立危险因素,对老年T2DM并发AS的诊断有辅助价值,多指标联合检测可提高诊断效能。

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。