Ubiquitin-specific protease 21 promotes tumorigenicity and stemness of colorectal cancer by deubiquitinating and stabilizing ZEB1

BACKGROUND Colorectal cancer(CRC)is one very usual tumor together with higher death rate.Ubiquitin-specific protease 21(USP21)has been confirmed to take part into the regulation of CRC progression through serving as a facilitator.Interestingly,the promotive function of USP21 has also discovered in the progression of CRC.ZEB1 has illustrated to be modulated by USP7,USP22 and USP51 in cancers.However,the regulatory functions of USP21 on ZEB1 in CRC progression need more invest-igations.AIM To investigate the relationship between USP21 and ZEB1 in CRC progression.METHODS The mRNA and protein expressions were assessed through RT-qPCR,western blot and IHC assay.The interaction between USP21 and ZEB1 was evaluated through Co-IP and GST pull down assays.The cell proliferation was detected through colony formation assay.The cell migration and invasion abilities were determined through Transwell assay.The stemness was tested through sphere formation assay.The tumor growth was evaluated through in vivo mice assay.RESULTS In this work,USP21 and ZEB1 exhibited higher expression in CRC,and resulted into poor prognosis.Moreover,the interaction between USP21 and ZEB1 was further investigated.It was demonstrated that USP21 contributed to the stability of ZEB1 through modulating ubiquitination level.In addition,USP21 streng-thened cell proliferation,migration and stemness through regulating ZEB1.At last,through in vivo assays,it was illustrated that USP21/ZEB1 axis aggravated tumor growth.CONCLUSION For the first time,these above findings manifested that USP21 promoted tumorigenicity and stemness of CRC by deubiquitinating and stabilizing ZEB1.This discovery suggested that USP21/ZEB1 axis may provide novel sights for the treatment of CRC.

血清半胱氨酸天冬氨酸蛋白酶3和可溶性血管内皮生长因子受体-1水平与突发性耳聋患者病情及预后的关系分析

目的探讨血清半胱氨酸天冬氨酸蛋白酶3(Caspase-3)、可溶性血管内皮生长因子受体-1(sFIt-1)水平与突发性耳聋患者病情及预后的关系。方法选取2022年1月至2024年1月陕西省人民医院收治的78例突发性耳聋患者作为研究组。男46例,女32例;年龄32~76(47.92±4.65)岁;体重指数20.37~27.94(24.57±3.24)kg/m^(2)。另外,选取同期38例体检健康志愿者作为参照组,男21例,女17例,年龄34~63(48.23±4.81)岁;体重指数19.86~22.51(20.87±2.39)kg/m^(2)。采用纯音测听检查评估突发性耳聋患者病情,并根据严重程度进行分组,重度组16例[纯音平均听阈(PTA)>60 dBHL]、中度组39例(PTA>40~60 dBHL)、轻度组23例(PTA 20~40 dBHL)。所有患者均给予激素、营养神经等治疗,10 d为1个疗程,10 d后评估患者预后。根据预后情况将治疗后突发性耳聋患者分为预后良好组(57例)和预后不良组(21例)。采用酶联免疫吸附法检测受试者血清Caspase-3、sFIt-1水平。收集受试者一般资料,包括性别、年龄、体重指数、病程、临床症状、耳聋部位、听力损失程度、基础疾病等。采用独立样本t检验、重复测量方差分析和χ2检验进行统计学分析。采用Spearman秩相关系数进行相关性分析。采用多因素logistic回归分析突发性耳聋患者预后的影响因素。采用受试者操作特征曲线(ROC)分析血清Caspase-3、sFIt-1水平对突发性耳聋患者预后的预测效能。结果研究组血清Caspase-3、sFIt-1水平均高于参照组[(17.27±3.14)ng/L比(6.63±1.67)ng/L、(157.82±13.47)ng/L比(81.67±10.63)ng/L](均P<0.05)。重度、中度组Caspase-3、sFIt-1水平均高于轻度组,重度组上述指标均高于中度组(均P<0.05)。Spearman相关性分析显示,突发性耳聋患者血清Caspase-3、sFIt-1水平与病情严重程度呈正相关(r=0.881、0.841,均P<0.05)。预后不良组和预后良好组年龄、听力损伤程度、血清Caspase-3、sFIt-1水平比较,差异均有统计学意义(均P<0.05)。多因素logistic回归分析显示,听力损失程度(OR:0.009,95%CI:0.000~0.209)、年龄(OR:1.165,95%CI:1.049~1.293)、血清Caspase-3(OR:1.546,95%CI:1.183~2.022)、sFIt-1(OR:1.058,95%CI:1.015~1.104)水平均是突发性耳聋患者预后的影响因素(均P<0.05)。ROC分析结果显示,血清Caspase-3、sFIt-1水平联合预测的曲线下面积(AUC)大于血清Caspase-3、sFIt-1水平单独预测。其中联合预测灵敏度66.67%,特异度87.72%,AUC为0.819(0.712~0.925);Caspase-3灵敏度52.38%,特异度82.46%,AUC为0.721(0.593~0.849);sFIt-1灵敏度52.38%,特异度84.21%,AUC为0.703(0.573~0.832)。结论血清Caspase-3、sFlt-1水平升高可反映突发性耳聋患者病情严重程度,二者联合检测可更准确评估患者预后情况。

Small ubiquitin-like modifier protein-specific protease 1 and prostate cancer

Small ubiquitin-like modifier protein （SUMO） modification is a highly dynamic process, catalyzed by SUMO- specific activating （El）, conjugating （E2） and ligating （E3） enzymes, and reversed by a family of SUMO-specific proteases （SENPs）. There are six members of the human SENP family, and each SENP has different cellular locations and substrate specificities. However, the precise roles of SENPs in cellular processes have not been elucidated to date. This brief review will focus on recent advances pertaining to the identified targets of SENP 1 and its potential role in prostate cancer.

A dicistrovirus increases pupal mortality in Spodoptera frugiperda by suppressing protease activity and inhibiting larval diet consumption

Understanding interactions between viruses and their hosts is conducive to enabling better application of viruses as biocontrol agents.Certain viruses carried by parasitic wasps enhance the parasitic efficiency of wasp-larvae by protecting them against the immune system of their Lepidopteran host.However,the relationship between prey pests and viruses found in predatory natural enemies remains unclear.Herein,we report the interaction between Arma chinensis virus-1(AcV-1),originally isolated from a predatory natural enemy,Arma chinensis(Hemiptera:Pentatomidae),and one of its prey species,Spodoptera frugiperda(Lepidoptera:Noctuidae).The results showed that the AcV-1 virus appeared harmful to the novel host S.frugiperda by inhibiting larval diet consumption and increasing pupal mortality.Meanwhile,sequencing data indicated that the virus altered the gene expression profiles of S.frugiperda.KEGG analysis showed that the proteasome and phagosome pathways related to protein degradation and immune response were significantly enriched.Although the expression levels of digestive enzyme genes did not change significantly,the total protease activity of AcV-1 virus-positive individuals was significantly decreased,suggesting that the virus inhibited diet consumption of S.frugiperda via the down-regulation of digestive enzyme activities.These results indicate that a virus initially isolated in a predatory natural enemy can decrease the fitness of its prey species.The virus was found to impact the host proteasome and phagosome pathways related to protein degradation and immunity,providing a potential mechanism to enhance controlling efficiency.

Serine protease HtrA1 expression in human hepatocellular carcinoma

BACKGROUND: HtrA1, a serine protease, is down-regulated in various human solid tumors. Overexpression of HtrA1 in human cancer cells inhibits cell growth and proliferation in vitro and in vivo, suggesting its possible role as a tumor suppressor. METHODS: Immunohistochemistry was used to determine the expression of HtrA1 in 50 hepatocellular carcinoma specimens and adjacent liver tissues. The correlation between the expression of HtrA1 and the clinico-pathologic data were analyzed. RESULTS: The levels of HtrA1 were lower in tumor tissues than in their adjacent liver tissues. Moreover, an inverse relationship was found between HtrA1 expression and the differentiation of hepatocellular carcinoma. Loss of HtrA1 was more frequently found in tumors in Edmondson grade especially in those with venous invasion, compared to tumors in Edmondson grade I-II. Most importantly, patients with higher HtrA1 expression had a better survival rate. CONCLUSION: All these data suggest an important role of HtrA1 in hepatocellular carcinoma development and progression, which may be a new target for its treatment.

长链非编码RNA核富集转录本1对瘢痕成纤维细胞增殖、凋亡和迁移的影响

背景:已有研究阐明核富集转录本1(nuclear enriched abundant transcript 1,NEAT1)下调抑制了瘢痕成纤维细胞的进展,但具体机制尚不完全清楚。目的:探讨长链非编码RNA NEAT1调节miR-136-5p/泛素特异性蛋白酶4(ubiquitin specific protease 4,USP4)轴对瘢痕成纤维细胞生物学行为的影响。方法:将瘢痕成纤维细胞分为5组:si-NC组、空白对照组、si-NEAT1组、si-NEAT1+miR-136-5p inhibitor组、si-NEAT1+inhibitor-NC组,qRT-PCR检测NEAT1、miR-136-5p表达;CCK-8法及EDU染色检测细胞增殖能力;流式细胞术检测细胞凋亡情况;划痕愈合实验检测细胞迁移情况;Western blot检测USP4、p27、Bax、基质金属蛋白酶9、α-平滑肌肌动蛋白、Ⅰ型胶原蛋白α1链蛋白表达;双荧光素酶实验检测NEAT1与miR-136-5p、miR-136-5p与USP4的关系。结果与结论:①与si-NC组比较,si-NEAT1组NEAT1表达、A450值、EDU阳性细胞百分比、划痕愈合率以及USP4、基质金属蛋白酶9、α-平滑肌肌动蛋白、Ⅰ型胶原蛋白α1链蛋白表达降低(P<0.05),miR-136-5p表达、细胞凋亡率及p27、Bax蛋白表达升高(P<0.05);②miR-136-5p inhibitor逆转了沉默NEAT1对瘢痕成纤维细胞生物学行为的影响;③miR-136-5p与NEAT1、miR-136-5p与USP4存在靶向调控关系。结果表明,沉默NEAT1可能通过调控miR-136-5p/USP4轴抑制瘢痕成纤维细胞的增殖和迁移,诱导其凋亡。

DNA Methylation Profiles of Protease Nexin 1 (SERPINE2) Gene in Human Cell Lines

Objective： To investigated whether epigenetic mechanisms contribute to the variable expression of variable protease nexin1（PN-1） encoded by the SERPINE2 gene in different cell types. Methods： Working with 5 human cell lines, we determined the CpG methylation status within two CpG islands in the SERPINE2 gene by bisulphate sequencing and the PN-1 mRNA level by Q-RT PCR. Results： A CpG island spanning the transcription initiation site showed little methylation in 3 of the cell lines and substantial methylation in 2 of the cell lines. A CpG island covering the translation starting site showed full methylation in all investigated cell lines. Methylation within the CpG island was not randomly distributed, but showed accumulation at specific sites. However, we were not able to distinguish any patterns which related the methylation frequency to the gene expression level. Inhibition of CpG methylation with 5-aza-2’-deoxycytidine led to a several fold increase in PN-1 mRNA levels, but based on the results on CpG methylation in the CpG island spanning the transcript, the effect is most likely indirect. Conclusion： We have carefully mapped the CpG methylation pattern in two CpG islands in the 5’ part of the SERPINE2 gene without finding any obvious inverse correlation between methylation frequency and expression level.

Hippocampal expression of apoptotic protease activating factor-1 following diffuse axonal injury under mild hypothermia

The influence of mild hypothermia on neural cell apoptosis remains poorly understood. Therefore, the present study established rat models of diffuse axonal injury （DAI） at 33℃. Morris water maze results demonstrated significantly better learning and memory functions in DAI rats with hypothermia compared with DAI rats with normothermia. Expression of apoptotic protease activating factor-1 in the hippocampal CA1 region was significantly lower in the DAI hypothermia group compared with the DAI normothermia group. Expression of apoptotic protease activating factor-1 positively correlated with latency, but negatively correlated with platform location times and time of swimming in the quadrant area. Results suggested that post-traumatic mild hypothermia in a rat model of DAI could provide cerebral protection by attenuating expression of apoptotic protease activating factor-1.

Synthesis of N1-Substituted-3-aryl-4-alkyl-4, 5-dihydro-1H-1-pyra-zolethiocarboxamide as Novel Small Molecule Inhibitors of Cysteine Protease of T.cruzi

A series of N1-substituted-3-aryl-4-alkyl-4, 5-dihydro-1H-1-pyrazolethiocarboxamide were prepared from the Mannich bases of aryl ketones in good yields. Some derivatives were found to be active against the cysteine protease of T.cruzi..

A new approach for HIV-1 protease cleavage site prediction combined with feature selection

Acquired immunodeficiency syndrome (AIDS) is a fatal disease which highly threatens the health of human being. Human immunodeficiency virus (HIV) is the pathogeny for this disease. Investigating HIV-1 protease cleavage sites can help researchers find or develop protease inhibitors which can restrain the replication of HIV-1, thus resisting AIDS. Feature selection is a new approach for solving the HIV-1 protease cleavage site prediction task and it’s a key point in our research. Comparing with the previous work, there are several advantages in our work. First, a filter method is used to eliminate the redundant features. Second, besides traditional orthogonal encoding (OE), two kinds of newly proposed features extracted by conducting principal component analysis (PCA) and non-linear Fisher transformation (NLF) on AAindex database are used. The two new features are proven to perform better than OE. Third, the data set used here is largely expanded to 1922 samples. Also to improve prediction performance, we conduct parameter optimization for SVM, thus the classifier can obtain better prediction capability. We also fuse the three kinds of features to make sure comprehensive feature representation and improve prediction performance. To effectively evaluate the prediction performance of our method, five parameters, which are much more than previous work, are used to conduct complete comparison. The experimental results of our method show that our method gain better performance than the state of art method. This means that the feature selection combined with feature fusion and classifier parameter optimization can effectively improve HIV-1 cleavage site prediction. Moreover, our work can provide useful help for HIV-1 protease inhibitor developing in the future.

Exploring QSARs for Inhibitory Activity of Cyclic Urea and Nonpeptide-Cyclic Cyanoguanidine Derivatives HIV-1 Protease Inhibitors by Artificial Neural Network

Quantitative structure–activity relationship study using artificial neural network (ANN) methodology were conducted to predict the inhibition constants of 127 symmetrical and unsymmetrical cyclic urea and cyclic cyanoguanidine derivatives containing different substituent groups such as: benzyl, isopropyl, 4-hydroxybenzyl, ketone, oxime, pyrazole, imidazole, triazole and having anti-HIV-1 protease activities. The results obtained by artificial neural network give advanced regression models with good prediction ability. The two optimal artificial neural network models obtained have coefficients of determination of 0.746 and 0.756. The lowest prediction’s root mean square error obtained is 0.607. Artificial neural networks provide improved models for heterogeneous data sets without splitting them into families. Both the external and cross-validation methods are used to validate the performances of the resulting models. Randomization test is employed to check the suitability of the models.

Monitoring the autoproteolysis of hiv-1 protease by site-directed spin-labeling and electron paramagnetic resonance spectroscopy

Site-directed spin-labeling with continuous wave electron paramagnetic resonance spectroscopy was used to monitor autoproteolysis of HIV-1 protease, an enzyme essential for viral maturation. Two protein constructs were examined, namely subtype F and the circulating recombinant form CRF01_A/E. As the protease undergoes self-cleavage, protein unfolds and small peptide fragments containing the spin label are generated, which collectively give rise to a sharp spectral component that is easily discernable in the high-field resonance line in the EPR spectrum. By monitoring the intensity of this spectral component over time, the autoproteolytic stability of each construct was characterized under various conditions. Data were collected for samples stored at 4 °C, 25 °C, and 37 °C, and on a subtype F HIV-1 protease sample stored at 25 °C and containing the FDA-approved protease inhibitor Tipranavir. As expected, the rate of autoproteolysis decreased as the storage temperature was lowered. Minimal autoproteolysis was seen for the sample that contained Tipranavir, providing direction for future spectroscopic studies of active protease samples. When compared to standard methods of monitoring protein degradation such as gel electrophoresis or chromatographic analyses, spin-labeling with CW EPR offers a facile, real-time, non-consuming way to monitor autoproteolysis or protein degradation. Additionally, mass spectrometry studies revealed that the N-termini of both constructs are sensitive to degradation and that the sites of specific autoproteolysis vary.

A protease-activated receptor 1 antagonist protects against global cerebral ischemia/reperfusion injury after asphyxial cardiac arrest in rabbits

Cerebral ischemia/reperfusion injury is partially mediated by thrombin, which causes brain damage through protease-activated receptor 1（PAR1）. However, the role and mechanisms underlying the effects of PAR1 activation require further elucidation. Therefore, the present study investigated the effects of the PAR1 antagonist SCH79797 in a rabbit model of global cerebral ischemia induced by cardiac arrest. SCH79797 was intravenously administered 10 minutes after the model was established. Forty-eight hours later, compared with those administered saline, rabbits receiving SCH79797 showed markedly decreased neuronal damage as assessed by serum neuron specific enolase levels and less neurological dysfunction as determined using cerebral performance category scores. Additionally, in the hippocampus, cell apoptosis, polymorphonuclear cell infiltration, and c-Jun levels were decreased, whereas extracellular signal-regulated kinase phosphorylation levels were increased. All of these changes were inhibited by the intravenous administration of the phosphoinositide 3-kinase/Akt pathway inhibitor LY29004（3 mg/kg） 10 minutes before the SCH79797 intervention. These findings suggest that SCH79797 mitigates brain injury via anti-inflammatory and anti-apoptotic effects, possibly by modulating the extracellular signal-regulated kinase, c-Jun N-terminal kinase/c-Jun and phosphoinositide 3-kinase/Akt pathways.

Effect of protease inhibitor from Agaricus bisporus on glucose uptake and oxidative stress in 3T3-L1 adipocytes

Objective:To explore the effect of the protease inhibitor from Agaricus bisporus(J.E.Lange)Imbach(AbPI)on glucose uptake and oxidative stress in 3 T3-L1 adipocytes.Methods:Adipocytes were differentiated and stained with OilRed-O staining to confirm adipogenesis.The toxic/protective effect of AbPI on the adipocytes was determined by MTT assay,intracellular reactive oxygen species generation through flow cytometry,and morphologically through confocal microscopy using propidium iodide,4,6-diamino-2-phenylindol dihydrochloride,and 2’,7’-dichlorofluorescein diacetate dyes.The uptake of fluorescent glucose analog,2-[N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)amino]-2-deoxy-d-glucose by adipocytes was also studied through confocal microscopy.Results:MTT assay showed that the cell survival rate was(28.00±3.00)%,(92.33±2.60)%,and(71.34±2.10)%in the presence of 2 mM H2O2,AbPI alone,and AbPI and H2O2 both,respectively,in comparison to the control.Oil-Red-O staining indicated that Ab PI enhanced adipogenesis.AbPI stimulated the glucose uptake by adipocytes similar to the drug rosiglitazone,and showed insulinsensitizing effect in the presence of insulin,but failed to stimulate the uptake in the absence of insulin.Intracellular reactive oxygen species generation was reduced in differentiating adipocytes upon Ab PI treatment.Confocal microscopy showed that the damaged cell population rose to 3.50%,117.84%,and 261.50%in the presence of Ab PI alone,AbPI with H2O2,and H2O2 alone,respectively.Conclusions:The protease inhibitor enhances glucose uptake by adipocytes and exhibits a cytoprotective effect on them.

经阴道超声血流参数及血清SERPINA1水平与子宫肌瘤患者保守治疗效果的相关性

目的分析经阴道超声血流参数[收缩期峰值流速(PSV)、舒张末期流速(EDV)、阻力指数(RI)、峰值收缩期/舒张期流速(S/D)]及血清丝氨酸蛋白酶抑制剂1(SERPINA1)水平与子宫肌瘤患者保守治疗效果的相关性。方法回顾性收集河南省第二人民医院2019年10月至2023年9月收治的80例子宫肌瘤患者为研究组,另选取80例健康体检者为对照组,子宫肌瘤患者均进行临床保守治疗,根据治疗3个月时不同临床疗效情况分为治疗有效、治疗无效患者;对比两组入院时PSV、EDV、RI、S/D及血清SERPINA1水平,对比不同临床疗效患者入院时及治疗3个月时各指标水平,受试者工作特征(ROC)曲线及曲线下面积(AUC)分析治疗3个月时各指标联合检测对治疗无效的预测价值,并分析其不同水平患者发生治疗无效的危险度。结果研究组入院时PSV、EDV、SERPINA1均高于对照组、RI、S/D表达低于对照组(P<0.05);治疗无效患者治疗3个月时PSV、EDV、SERPINA1均高于治疗有效患者,RI、S/D表达低于治疗有效患者(P<0.05);治疗3个月时PSV、EDV、RI、S/D及血清SERPINA1水平联合预测治疗无效的AUC为0.763、0.836;治疗3个月时高水平PSV、EDV、SERPINA1及低水平的RI、S/D患者发生治疗无效的危险度较高(P<0.05)。结论经阴道超声血流参数及血清SERPINA1水平与宫肌瘤保守治疗临床疗效相关,检测其表达可有效预测子宫肌瘤患者保守治疗效果,具有较高的临床应用价值。

MicroRNA-137-5p靶向USP30改善阿尔茨海默病

目的 探索miR-137-5p对阿尔茨海默病(AD)的保护机制。方法 首先用qRT-PCR评估AD患者和健康对照组人血清中miR-137和USP30的表达。用D-半乳糖和氯化铝建立AD小鼠模型,用水迷宫试验检测小鼠的行为,确认AD小鼠模型的成功。用Aβ1-42寡聚体诱导的SH-SY5Y细胞建立AD细胞模型,通过实时定量聚合酶链反应检测AD模型中miR-137-5p和USP30的表达。双重荧光素酶试验用于验证miR-137-5p和USP30之间的靶向结合关系。结果 miR-137-5p的表达在AD患者中与健康对照组相比有所下降(P<0.05),而USP30则明显增加(P<0.05)。miR-137-5p能改善AD细胞模型中的细胞凋亡,USP30的过表达部分废除了miR-137-5p对Aβ1-42-处理的SH-SY5Y细胞的影响,miR-137-5p通过靶向USP30改善AD小鼠的认知能力和Aβ的沉积。结论 miR-137-5p可以通过下调USP30来改善AD症状,miR-137-5p可能能成为治疗AD的一个靶点。

子宫动脉血流多普勒超声联合血清PIGF、Vaspin、ESM-1诊断HDP价值

目的:探讨妊娠高血压疾病(HDP)患者子宫动脉血流多普勒超声、血清促血管生成因子(PIGF)、丝氨酸蛋白酶抑制剂(Vaspin)、内皮细胞特异分子-1(ESM-1)水平及其诊断价值。方法:回顾性收集2020年6月-2021年12月本院接诊的HDPL患者86例为病例组,产前检查健康孕妇75例为对照组,检测两组血清PIGF、Vaspin、ESM-1水平及子宫动脉血流参数,分析在诊断HDP价值。结果:病例组血清PIGF(271.56±45.56 pg/ml)低于对照组(330.15±50.35 pg/ml),Vaspin(0.46±0.04 ng/ml)、ESM-1(1.38±0.51μg/L)高于对照组(0.39±0.08 ng/ml、1.01±0.07μg/L),多普勒超声子宫动脉血流阻力指数(RI)(0.79±0.14)、搏动指数(PI)(0.83±0.21)、收缩期峰值流速与舒张末期血流速度比值(S/D)(2.26±0.74)均高于对照组(0.51±0.20、0.44±0.19、1.41±0.35),且病例组妊娠期高血压、轻度子痫前期、重度子痫前期患者上述各指标均有差异(均P<0.05)。受试者工作特征曲线分析,血清PIGF、Vaspin、ESM-1、RI、PI、S/D及各项联合,诊断HDP的曲线下面积分别为0.811、0.780、0.691、0.944、0.860、0.813、0.999,截断值分别为291.56 pg/ml、0.43 ng/ml、1.12μg/L、0.58、0.53、1.87,联合检测的特异度(96.5%)、准确度(93.4%)最高(均P<0.05)。结论:HDP患者血清PIGF、Vaspin、ESM-1、子宫动脉血流参数异常改变,且对HDP有较好诊断价值,本次研究也为靶向药物治疗HDP提供了新思路。

胃癌组织中IL-32与Apaf-1蛋白的表达及意义

目的 分析胃癌组织中白细胞介素-32(Interleukin-32,IL-32)与凋亡蛋白酶激活因子-1(Apoptotic Protease Activating Factor-1,Apaf-1)的表达及意义。方法 回顾性选取2019年1月—2022年12月南通市肿瘤医院收治的100例胃癌患者的临床资料,分别取其胃癌组织标本(胃癌组)和正常胃黏膜标本(癌旁组),通过免疫组化法(Streptavidin-perosidase,SP)检测胃癌标本与正常标本中IL-32、Apaf-1蛋白的阳性表达情况。结果胃癌组IL-32阳性表达率高于癌旁组,Apaf-1蛋白阳性表达率低于癌旁组,差异有统计学意义(P均<0.05);胃癌患者高中分化程度与低分化程度之间,浸润深度<肌层与≥肌层之间,TNM分期为Ⅰ、Ⅱ期与分期为Ⅲ、Ⅳ期之间以及有无淋巴结转移之间的IL-32、Apaf-1蛋白阳性表达率对比,差异有统计学意义(P均<0.05)。结论 IL-32与Apaf-1蛋白的阳性表达可为胃癌患者的临床诊断和治疗提供重要的参考价值。

血清TRAP1、Cystatin-SN联合检测在肺结节鉴别诊断中的价值

目的研究血清肿瘤坏死因子受体相关蛋白1(TRAP1)、半胱氨酸蛋白酶抑制剂SN(Cystatin-SN)联合检测在良性肺结节与恶性肺结节中的诊断价值。方法选取2021年7月—2023年6月江苏省扬州大学附属医院胸外科诊治的肺结节患者198例作为研究对象,根据病理检查结果分为良性结节组42例,恶性结节组156例。检测良性结节组和恶性结节组血清TRAP1、Cystatin-SN水平;绘制ROC曲线分析血清TRAP1、Cystatin-SN单一及联合检查对恶性肺结节的诊断效能。结果恶性结节组血清TRAP1、Cystatin-SN水平显著高于良性结节组,差异有统计学意义(t/P=32.273/<0.001、30.512/<0.001)。在恶性肺结节组中,有淋巴结转移、组织学低/未分化患者血清TRAP1、Cystatin-SN水平高于无淋巴结转移、组织学高/中分化患者,差异有统计学意义(t/P=11.812/<0.001、5.547/<0.001,16.837/<0.001、8.923/<0.001),而不同性别、临床症状、结节部位、病理类型患者比较,差异均无统计学意义(P>0.05)。ROC曲线分析结果表明,血清TRAP1、Cystatin-SN单独及二者联合检查诊断恶性肺结节的曲线下面积(AUC)分别为0.831、0.863和0.938,二者联合的AUC显著大于TRAP1、Cystatin-SN单独预测,差异有统计学意义(Z=2.127、2.038,P<0.05)。结论恶性肺结节患者血清中TRAP1、Cystatin-SN水平较高,二者联合检测在肺结节良恶性鉴别诊断中具有良好的应用价值。

冠心病心绞痛患者血清内脏脂肪特异性丝氨酸蛋白酶抑制剂、不规则趋化因子、单核细胞趋化蛋白-1与心功能、心肌损伤指标相关性分析

目的:探讨冠心病(CHD)心绞痛患者血清内脏脂肪特异性丝氨酸蛋白酶抑制剂(Vaspin)、单核细胞趋化蛋白-1(MCP-1)、不规则趋化因子(Fractalkine)与心功能、心肌损伤指标的相关性。方法:选取150例CHD心绞痛患者作为观察组(不稳定型心绞痛患者64例为A组、稳定型心绞痛患者86例为B组),同期收治的164例非CHD患者为C组。比较三组血清Fractalkine、Vaspin、MCP-1水平、心功能指标及心肌损伤指标,相关性采用Pearson相关性分析。结果:A组血清Vaspin水平低于B组、C组,且与C组比较,B组更低;A组血清Fractalkine、MCP-1水平高于B组、C组,且与C组比较,B组更高(均P<0.05)。A组左心室射血分数(LVEF)、左心室短轴缩短率(FS)低于B组、C组,且与C组比较,B组更低;A组左心室舒张末期内径(LVEDD)、左室收缩末期内径(LVESD)高于B组、C组,且与C组比较,B组更高(均P<0.05)。A组各心肌损伤指标水平均高于B组、C组,且与C组比较,B组更高(均P<0.05)。Pearson相关性分析:CHD心绞痛患者血清Vaspins水平与LVEF、FS成正比;血清Vaspins水平与LVEDD、LVESD、肌酸激酶(CK)、肌酸激酶同工酶(CK-MB)、肌钙蛋白I(cTnI)、心型脂肪酸结合蛋白(H-FABP)成反比;血清Fractalkine、MCP-1与LVEF、FS成反比;血清Fractalkine、MCP-1与LVEDD、LVESD、CK、CK-MB、cTnI、H-FABP成正比(均P<0.05)。结论:随着CHD心绞痛患者病情加重,患者心功能及心肌损伤越严重,且患者血清Vaspins、Fractalkine、MCP-1与患者心功能及心肌损伤具有密切联系,临床可根据其水平变化评估病情进展情况。