Activation of the wnt/β-catenin/CYP1B1 pathway alleviates oxidative stress and protects the blood-brain barrier under cerebral ischemia/reperfusion conditions

Accumulating evidence suggests that oxidative stress and the Wnt/β-catenin pathway participate in stroke-induced disruption of the blood-brain barrier.However,the potential links between them following ischemic stroke remain largely unknown.The present study found that cerebral ischemia leads to oxidative stress and repression of the Wnt/β-catenin pathway.Meanwhile,Wnt/β-catenin pathway activation by the pharmacological inhibito r,TWS119,relieved oxidative stress,increased the levels of cytochrome P4501B1(CYP1B1)and tight junction-associated proteins(zonula occludens-1[ZO-1],occludin and claudin-5),as well as brain microvascular density in cerebral ischemia rats.Moreove r,rat brain microvascular endothelial cells that underwent oxygen glucose deprivation/reoxygenation displayed intense oxidative stress,suppression of the Wnt/β-catenin pathway,aggravated cell apoptosis,downregulated CYP1B1and tight junction protein levels,and inhibited cell prolife ration and migration.Overexpression ofβ-catenin or knockdown ofβ-catenin and CYP1B1 genes in rat brain mic rovascular endothelial cells at least partly ameliorated or exacerbated these effects,respectively.In addition,small interfering RNA-mediatedβ-catenin silencing decreased CYP1B1 expression,whereas CYP1B1 knoc kdown did not change the levels of glycogen synthase kinase 3β,Wnt-3a,andβ-catenin proteins in rat brain microvascular endothelial cells after oxygen glucose deprivatio n/reoxygenation.Thus,the data suggest that CYP1B1 can be regulated by Wnt/β-catenin signaling,and activation of the Wnt/β-catenin/CYP1B1 pathway contributes to alleviation of oxidative stress,increased tight junction levels,and protection of the blood-brain barrier against ischemia/hypoxia-induced injury.

Calculus bovis inhibits M2 tumor-associated macrophage polarization via Wnt/β-catenin pathway modulation to suppress liver cancer

BACKGROUND Calculus bovis(CB),used in traditional Chinese medicine,exhibits anti-tumor effects in various cancer models.It also constitutes an integral component of a compound formulation known as Pien Tze Huang,which is indicated for the treatment of liver cancer.However,its impact on the liver cancer tumor microenvironment,particularly on tumor-associated macrophages(TAMs),is not well understood.AIM To elucidate the anti-liver cancer effect of CB by inhibiting M2-TAM polarization via Wnt/β-catenin pathway modulation.METHODS This study identified the active components of CB using UPLC-Q-TOF-MS,evaluated its anti-neoplastic effects in a nude mouse model,and elucidated the underlying mechanisms via network pharmacology,transcriptomics,and molecular docking.In vitro assays were used to investigate the effects of CB-containing serum on HepG2 cells and M2-TAMs,and Wnt pathway modulation was validated by real-time reverse transcriptase-polymerase chain reaction and Western blot analysis.RESULTS This study identified 22 active components in CB,11 of which were detected in the bloodstream.Preclinical investigations have demonstrated the ability of CB to effectively inhibit liver tumor growth.An integrated approach employing network pharmacology,transcriptomics,and molecular docking implicated the Wnt signaling pathway as a target of the antineoplastic activity of CB by suppressing M2-TAM polarization.In vitro and in vivo experiments further confirmed that CB significantly hinders M2-TAM polarization and suppresses Wnt/β-catenin pathway activation.The inhibitory effect of CB on M2-TAMs was reversed when treated with the Wnt agonist SKL2001,confirming its pathway specificity.CONCLUSION This study demonstrated that CB mediates inhibition of M2-TAM polarization through the Wnt/β-catenin pathway,contributing to the suppression of liver cancer growth.

Calculus bovis in hepatocellular carcinoma:Tumor molecular basis,Wnt/β-catenin pathway role,and protective mechanism

In this editorial,we comment on the recent article by Huang et al.The editorial focuses specifically on the molecular mechanisms of hepatocellular carcinoma(HCC),mechanism of Wnt/β-catenin pathway in HCC,and protective mechanism of Calculus bovis(CB)in HCC.Liver cancer is the fourth most common cause of cancer-related deaths globally.The most prevalent kind of primary liver cancer,HCC,is typically brought on by long-term viral infections(hepatitis B and C),non-alcoholic steatohepatitis,excessive alcohol consumption,and other conditions that can cause the liver to become chronically inflamed and cirrhotic.CB is a wellknown traditional remedy in China and Japan and has been used extensively to treat a variety of diseases,such as high fever,convulsions,and stroke.Disturbances in lipid metabolism,cholesterol metabolism,bile acid metabolism,alcohol metabolism,and xenobiotic detoxification lead to fatty liver disease and liver cirrhosis.Succinate,which is a tricarboxylic acid cycle intermediate,is vital to energy production and mitochondrial metabolism.It is also thought to be a signaling molecule in metabolism and in the development and spread of liver malignancies.The Wnt/β-catenin pathway is made up of a group of proteins that are essential for both adult tissue homeostasis and embryonic development.Cancer is frequently caused by the dysregulation of the Wnt/β-catenin signaling pathway.In HCC liver carcinogenesis,Wnt/β-catenin signaling is activated by the expression of downstream target genes.Communication between the liver and the gut exists via the portal vein,biliary tract,and systemic circulation.This"gutliver axis"controls intestinal physiology.One of the main factors contributing to the development,progression,and treatment resistance of HCC is the abnormal activation of the Wnt/β-Catenin signaling pathway.Therefore,understanding this pathway is essential to treating HCC.Eleven ingredients of CB,particularly oleanolic acid,ergosterol,and ursolic acid,have anti-primary liver cancer properties.Additionally,CB is important in the treatment of primary liver cancer through pathways linked to immune system function and apoptosis.CB also inhibits the proliferation of cancer stem cells and tumor cells and controls the tumor microenvironment.In the future,clinicians may be able to recommend one of many potential new drugs from CB ingredients to treat HCC expression,development,and progress.

Silencing of peroxiredoxin 2 suppresses proliferation and Wnt/β-catenin pathway,and induces senescence in hepatocellular carcinoma

Hepatocellular carcinoma(HCC),a common malignancy worldwide,still lacks effective clinical treatment.The study aimed to investigate the oncogenes that affect the progression of HCC and their possible mechanisms.In our study,we initially confirmed a higher level of PRDX2 in the bile of HCC patients compared to those with choledocholithiasis by 2-DE,LC-MS,and ELISA.Subsequently,we demonstrated the high expression of peroxiredoxin 2(PRDX2)in HCC based on the TCGA database and clinical sample analysis.Furthermore,PRDX2 overexpression enhanced the viability of HCC cells.And PRDX2 silencing induced senescence of HCC cells.In vivo,knockdown of PRDX2 significantly reduced the weight of xenograft tumors.PRDX2 also was found to activate the Wnt/β-catenin pathway by inducingβ-catenin nuclear translocation.Consequently,we proved that silencing PRDX2 could inhibit proliferation and Wnt/β-catenin pathway while promoting senescence in HCC cells.

Cinobufotalin prevents bone loss induced by ovariectomy in mice through the BMPs/SMAD and Wnt/β-catenin signaling pathways

Background:Osteoporosis is a chronic bone disease characterized by bone loss and decreased bone strength.However,current anti-resorptive drugs carry a risk of various complications.The deep learning-based efficacy prediction system(DLEPS)is a forecasting tool that can effectively compete in drug screening and prediction based on gene expression changes.This study aimed to explore the protective effect and potential mechanisms of cinobufotalin(CB),a traditional Chinese medicine(TCM),on bone loss.Methods:DLEPS was employed for screening anti-osteoporotic agents according to gene profile changes in primary osteoporosis.Micro-CT,histological and morphological analysis were applied for the bone protective detection of CB,and the osteogenic differentiation/function in human bone marrow mesenchymal stem cells(hBMMSCs)were also investigated.The underlying mechanism was verified using qRT-PCR,Western blot(WB),immunofluorescence(IF),etc.Results:A safe concentration(0.25mg/kg in vivo,0.05μM in vitro)of CB could effectively preserve bone mass in estrogen deficiency-induced bone loss and promote osteogenic differentiation/function of hBMMSCs.Both BMPs/SMAD and Wnt/β-catenin signaling pathways participated in CB-induced osteogenic differentiation,further regulating the expression of osteogenesis-associated factors,and ultimately promoting osteogenesis.Conclusion:Our study demonstrated that CB could significantly reverse estrogen deficiency-induced bone loss,further promoting osteogenic differentiation/function of hBMMSCs,with BMPs/SMAD and Wnt/β-catenin signaling pathways involved.

IL13RA2 promotes progression of infantile haemangioma by activating glycolysis and the Wnt/β-catenin signaling pathway

Background:Interleukin 13 receptor subunit alpha 2(IL13RA2)plays an essential role in the progression of many cancers.However,the role of IL13RA2 in infantile haemangioma(IH)is still unknown.Materials and Methods:IL13RA2 expression in IH tissues was analyzed using western blot,qRT-PCR,and immunofluorescence.The role of IL13RA2 in haemangioma-derived endothelial cells(HemECs)was determined following knockdown or overexpression of IL13RA2 using CCK-8,colony formation,apoptosis,wound healing,tubule formation,Transwell,and western blot.Results:IL13RA2 expression was upregulated in IH tissues.IL13RA2 overexpression promoted proliferation,migration,and invasion of HemECs and induced glycolysis,which was confirmed with a glycolysis inhibitor.Specifically,IL13RA2 interacted withβ-catenin and activated the Wnt/β-catenin pathway in HemECs,which were involved in the above-mentioned effects of IL13RA2.Conclusions:These findings revealed that targeting IL13RA2 is a potential therapeutic approach for IH.

Inhibition of M2 tumor-associated macrophages polarization by modulating the Wnt/β-catenin pathway as a possible liver cancer therapy method

The problem of liver cancer is becoming increasingly important due to the epi-demic of metabolic diseases and persistent high alcohol consumption.This deter-mines great attention to the development and improvement of methods for early diagnosis and treatment of liver cancer.Huang et al presented a study in the World Journal of Gastroenterology,in which they showed that the use of the traditional Chinese medicine Calculus bovis(CB)can suppress tumor growth in mice by inhibiting M2 tumor-associated macrophages(TAM)through modulating the activity of the Wnt/β-catenin pathway.The interaction of CB components with the Wnt/β-catenin pathway,M2 TAM polarization,and tumor dynamics were studied using network pharmacology,transcriptomics,and molecular docking.It is now generally accepted that the polarization of TAM and the differentiation of the functions of M1 and M2 phagocytes are of great importance for the progression of neoplasms.It is assumed that M2 TAM promote proliferation and migration of tumor cells.Attempts to medicinally influence the Wnt/β-catenin pathway in order to modulate phagocyte polarization now belong to one of the most promising areas of immunotherapy of oncological diseases.Undoubtedly,the work of the Chinese authors deserves attention and further development.

Effects of Helicobacter pylori and Moluodan on the Wnt/β-catenin signaling pathway in mice with precancerous gastric cancer lesions

BACKGROUND Helicobacter pylori(H.pylori)is the primary risk factor for gastric cancer(GC),the Wnt/β-Catenin signaling pathway is closely linked to tumourigenesis.GC has a high mortality rate and treatment cost,and there are no drugs to prevent the progression of gastric precancerous lesions to GC.Therefore,it is necessary to find a novel drug that is inexpensive and preventive to against GC.AIM To explore the effects of H.pylori and Moluodan on the Wnt/β-Catenin signaling pathway and precancerous lesions of GC(PLGC).METHODS Mice were divided into the control,N-methyl-N-nitrosourea(MNU),H.pylori+MNU,and Moluodan groups.We first created an H.pylori infection model in the H.pylori+MNU and Moluodan groups.A PLGC model was created in the remaining three groups except for the control group.Moluodan was fed to mice in the Moloudan group ad libitum.The general condition of mice were observed during the whole experiment period.Gastric tissues of mice were grossly and microscopically examined.Through quantitative real-time PCR(qRT-PCR)and Western blotting analysis,the expression of relevant genes were detected.RESULTS Mice in the H.pylori+MNU group showed the worst performance in general condition,gastric tissue visual and microscopic observation,followed by the MNU group,Moluodan group and the control group.QRT-PCR and Western blotting analysis were used to detect the expression of relevant genes,the results showed that the H.pylori+MNU group had the highest expression,followed by the MNU group,Moluodan group and the control group.CONCLUSION H.pylori can activate the Wnt/β-catenin signaling pathway,thereby facilitating the development and progression of PLGC.Moluodan suppressed the activation of the Wnt/β-catenin signaling pathway,thereby decreasing the progression of PLGC.

Pachymic acid exerts antitumor activities by modulating the Wnt/β-catenin signaling pathway via targeting PTP1B

Objective:To determine the inhibitory effects of pachymic acid on lung adenocarcinoma(LUAD)cells and elucidate its underlying mechanism.Methods:CCK-8,wound healing,Transwell,Western blot,tube formation,and immunofluorescence assays were carried out to measure the effects of various concentrations of pachymic acid on LUAD cell proliferation,metastasis,angiogenesis as well as autophagy.Subsequently,molecular docking technology was used to detect the potential targeted binding association between pachymic acid and protein tyrosine phosphatase 1B(PTP1B).Moreover,PTP1B was overexpressed in A549 cells to detect the specific mechanisms of pachymic acid.Results:Pachymic acid suppressed LUAD cell viability,metastasis as well as angiogenesis while inducing cell autophagy.It also targeted PTP1B and lowered PTP1B expression.However,PTP1B overexpression reversed the effects of pachymic acid on metastasis,angiogenesis,and autophagy as well as the expression of Wnt3a andβ-catenin in LUAD cells.Conclusions:Pachymic acid inhibits metastasis and angiogenesis,and promotes autophagy in LUAD cells by modulating the Wnt/β-catenin signaling pathway via targeting PTP1B.

MicroRNA-329-3p inhibits the Wnt/β-catenin pathway and proliferation of osteosarcoma cells by targeting transcription factor 7-like 1

An important factor in the emergence and progre sion of osteosarcoma(OS)is the dysregulated expression of microRNAs(miRNAs).Transcription factor 7-like 1(TCF7LI),a member of the T cell factor/lymphoid enhancer factor(TCF/LEF)transcription factor family,interacts with the Wnt signaling pathway regulator β-catenin and acts as a DNA-specific binding protein.This study sought to elucidate the impact of the interaction between miR 3293p and TCF7L1 on.the growth and apoptosis of OS and analyze the regulatory expression relationship between miRNA and mRNA in osteosarcoma cells using a variety of approaches.MiR329-3p was significantly downregulated,while TCF7L1 was considerably up-regulated in all examined OS cell lines.Additionally,a clinical comparison study was performed using the TCGA database.Subsequently,the regulatory relationship between miR-329-3p and TCF7L1 on the proliferation and apoptosis of OS cells was verified through in vitro and in vivo experiments.When miR 329-3p was transfected into the OS cell line,the expression of TCF7L1 decreased,the proliferation of OS cells was inhibited,the cytoskeleton disintegrated,and the nucleus condensed to fom apoptotic bodies.The expression of proteins that indicate apoptosis increased simultaneously.The cell cycle was arrested in the G0/G1 phase,and the G1/S transition was blocked.The introduction of miR 3293p also inhibited downstream Cyclin D1 of the Wnt pathway.Xenograf experiments indicated that the overexpression of miR-329-3p signi ficanly inhibited the growth of OS xenografts in nude mice,and the expression of TCF7L1 and C-Myc in tumor tssues decreased.MiR 329-3p was significantly reduced in OS cells and played a suppressive role in tumorigenesis and proliferation by targeting TCF7L1 both in vitro and in vivo.Osteosarcoma cell cycle arrest and pathway inhibition were observed upon the regulation of TCF7LI by miR 3293p.Summarizing these results,it can be inferred that miR.3293p exerts anticancer efects in osteosarcoma by inhibiting TCF7L1.

ZNF554 Inhibits Endometrial Cancer Progression via Regulating RBM5 and Inactivating WNT/β-Catenin Signaling Pathway

Objective:Uterine corpus endometrial carcinoma(UCEC),a kind of gynecologic malignancy,poses a significant risk to women’s health.The precise mechanism underlying the development of UCEC remains elusive.Zinc finger protein 554(ZNF554),a member of the Krüppel-associated box domain zinc finger protein superfamily,was reported to be dysregulated in various illnesses,including malignant tumors.This study aimed to examine the involvement of ZNF554 in the development of UCEC.Methods:The expression of ZNF554 in UCEC tissues and cell lines were examined by qRT-PCR and Western blot assay.Cells with stably overexpressed or knocked-down ZNF554 were established through lentivirus infection.CCK-8,wound healing,and Transwell invasion assays were employed to assess cell proliferation,migration,and invasion.Propidium iodide(PI)staining combined with fluorescence-activated cell sorting(FACS)flow cytometer was utilized to detect cell cycle distribution.qRT-PCR and Western blotting were conducted to examine relative mRNA and protein levels.Chromatin immunoprecipitation assay and luciferase reporter assay were used to explore the regulatory role of ZNF554 in RNA binding motif 5(RBM5).Results:The expression of ZNF554 was found to be reduced in both UCEC samples and cell lines.Decreased expression of ZNF554 was associated with higher tumor stage,decreased overall survival,and reduced disease-free survival in UCEC.ZNF554 overexpression suppressed cell proliferation,migration,and invasion,while also inducing cell cycle arrest.In contrast,a decrease in ZNF554 expression resulted in the opposite effect.Mechanistically,ZNF554 transcriptionally regulated RBM5,leading to the deactivation of the Wingless(WNT)/β-catenin signaling pathway.Moreover,the findings from rescue studies demonstrated that the inhibition of RBM5 negated the impact of ZNF554 overexpression onβ-catenin and p-glycogen synthase kinase-3β(p-GSK-3β).Similarly,the deliberate activation of RBM5 reduced the increase inβ-catenin and p-GSK-3βcaused by the suppression of ZNF554.In vitro experiments showed that ZNF554 overexpression-induced decreases in cell proliferation and migration were counteracted by RBM5 knockdown.Additionally,when RBM5 was overexpressed,it hindered the improvements in cell proliferation and migration caused by reducing the ZNF554 levels.Conclusion:ZNF554 functions as a tumor suppressor in UCEC.Furthermore,ZNF554 regulates UCEC progression through the RBM5/WNT/β-catenin signaling pathway.ZNF554 shows a promise as both a prognostic biomarker and a therapeutic target for UCEC.

Complement factor Ⅰ knockdown inhibits colon cancer development by affecting Wnt/β-catenin/c-Myc signaling pathway and glycolysis

BACKGROUND Colon cancer(CC)occurrence and progression are considerably influenced by the tumor microenvironment.However,the exact underlying regulatory mechanisms remain unclear.AIM To investigate immune infiltration-related differentially expressed genes(DEGs)in CC and specifically explored the role and potential molecular mechanisms of complement factor I(CFI).METHODS Immune infiltration-associated DEGs were screened for CC using bioinformatics.Quantitative reverse transcription polymerase chain reaction was used to examine hub DEGs expression in the CC cell lines.Stable CFI-knockdown HT29 and HCT116 cell lines were constructed,and the diverse roles of CFI in vitro were assessed using CCK-8,5-ethynyl-2’-deoxyuridine,wound healing,and transwell assays.Hematoxylin and eosin staining and immunohistochemistry staining were employed to evaluate the influence of CFI on the tumorigenesis of CC xenograft models constructed using BALB/c male nude mice.Key proteins associated with glycolysis and the Wnt pathway were measured using western blotting.RESULTS Six key immune infiltration-related DEGs were screened,among which the expression of CFI,complement factor B,lymphoid enhancer binding factor 1,and SRY-related high-mobility-group box 4 was upregulated,whereas that of fatty acid-binding protein 1,and bone morphogenic protein-2 was downregulated.Furthermore,CFI could be used as a diagnostic biomarker for CC.Functionally,CFI silencing inhibited CC cell proliferation,migration,invasion,and tumor growth.Mechanistically,CFI knockdown downregulated the expression of key glycolysis-related proteins(glucose transporter type 1,hexokinase 2,lactate dehydrogenase A,and pyruvate kinase M2)and the Wnt pathway-related proteins(β-catenin and c-Myc).Further investigation indicated that CFI knockdown inhibited glycolysis in CC by blocking the Wnt/β-catenin/c-Myc pathway.CONCLUSION The findings of the present study demonstrate that CFI plays a crucial role in CC development by influencing glycolysis and the Wnt/β-catenin/c-Myc pathway,indicating that it could serve as a promising target for therapeutic intervention in CC.

香连片对小鼠溃疡性结肠炎癌变过程中DKK-1mRNA、β-catenin和PCNA蛋白表达的影响及意义

目的通过观察香连片对DKK-1 m RNA、β-catenin和PCNA蛋白表达的影响,初步明确香连片预防小鼠溃疡性结肠炎癌变的作用机制。方法 48只BALB/C小鼠随机分为空白组、模型组、香连片用药组和柳氮磺胺嘧啶组,采用DMH/DSS复合法诱导小鼠溃疡性结肠炎癌变模型,造模时间为18周,用药时间为11周。Real-time PCR检测DKK-1基因的表达,SABC免疫组织化学法检测β-catenin和PCNA蛋白的表达。结果 Real-time PCR检测结果表明香连片可以上调DKK-1 m RNA的表达,与模型组比较,差异有统计学意义(P<0.05);免疫组织化学结果表明香连片可以下调β-catenin和PCNA蛋白的表达,与模型组比较,差异具有统计学意义(P<0.05)。结论香连片预防小鼠溃疡性结肠炎癌变的作用机制与上调DKK-1的表达,阻抑Wnt/β-catenin信号通路有一定的关系。

乙型肝炎病毒及黄曲霉毒素暴露的肝细胞癌中β-catenin、PTEN的mRNA表达

目的研究β-catenin、PTEN基因在乙型肝炎病毒(HBV)及黄曲霉毒素B1(AFB1)暴露下肝细胞癌(HCC)中mRNA表达,探讨在双暴露情况下β-catenin、PTEN与HCC发生、发展的关系。方法根据HBV与AFB1的暴露情况,将108例肝细胞癌手术切除研究对象分为4组,A组:HBV(+)/AFB1(+)48例;B组:HBV(+)/AFB1(-)27例;C组:HBV(-)/AFB1(+)19例;D组:HBV(-)/AFB1(-)14例。同时收集正常肝组织者20例,分别来自肝外伤、肝血管瘤、肝移植供体等手术切除标本作为正常对照组。采用逆转录-PCR(RT-PCR)法检测β-catenin基因与PTEN基因的mRNA表达情况,分别对各组的表达情况进行比较。结果 RT-PCR显示,β-catenin基因mRNA的半定量平均灰度值A组(1.13±0.14)、C组(1.16±0.18)分别与D组(1.01±0.13)相比,差异有统计学意义(P<0.05),此外,A、B(1.06±0.18)、C、D组与正常对照组比较,差异均有统计学意义(P<0.001)。PTEN基因mRNA的半定量平均灰度值A组(0.54±0.13)、B组(0.59±0.16)分别与C组(0.97±0.16)及D组(0.92±0.13)相比,差异有统计学意义(P<0.05)。此外,A、B、D组与正常对照组相比,差异有统计学意义(P<0.05)。结论β-catenin基因的高表达率可能与AFB1高暴露有关,PTEN基因的失活与HBV高感染率有关。

MEBT/MEBO对糖尿病足溃疡创面愈合中Smad3、β-catenin mRNA表达的影响

目的采用RT-PCR检测方法观察皮肤原位再生复原技术(Moist Exposed BurnTreatment/Moist Exposed Burn Ointment,MEBT/MEBO)对大鼠糖尿病足溃疡创面愈合的干预作用,研究其促进溃疡创面愈合的机制。方法将100只雄性SD大鼠随机分为空白对照组(20只)和糖尿病造模组(80只),糖尿病造模组大鼠尾静脉注射链脲佐菌素(STZ),成功制备糖尿病大鼠模型64只,从中随机选取60只,并随机分为湿润烧伤膏(MEBO)组(20只)、贝复济组(20只)和模型组(20只)。造模成功后次日开始用药,各组大鼠创面给予相应的药物治疗,并记录创面愈合时间;用药6 d后,采用RT-PCR法观察记录创面肉芽组织中β-catenin mRNA和Smad3 mRNA的表达量。结果 (1)4组大鼠创面平均愈合时间对比,空白对照组愈合时间最短;MEBO组、贝复济组、模型组3组大鼠创面平均愈合时间对比,MEBO组愈合时间最短。(2)用药后第6天,模型组大鼠创面肉芽组织中β-catenin mRNA的表达显著低于空白对照组、MEBO组、贝复济组(P<0.01),而MEBO组与贝复济组相比,差异具有统计学意义(P<0.05);模型组大鼠创面肉芽组织中Smad3 mRNA的表达显著高于空白对照组、MEBO组、贝复济组(P<0.01),而MEBO组与贝复济组相比,差异具有统计学意义(P<0.05)。结论 MEBT/MEBO可抑制Smad3 mRNA、增强β-catenin mRNA在实验性糖尿病足溃疡大鼠创面修复中的表达,缩短创面愈合时间,促进糖尿病足溃疡创面的愈合。

青光安Ⅱ号对慢性高眼压模型大鼠视网膜GSK-3β及β-catenin mRNA表达影响

目的观察青光安Ⅱ号方对慢性高眼压模型大鼠视网膜GSK-3β及β-catenin mRNA表达影响。方法将40只(80眼)雄性SD大鼠随机分成6组,分别为:空白组(A),模型组(B)、青光安Ⅱ号方低剂量组(C)、青光安Ⅱ号方中剂量组(D)、青光安Ⅱ号方高剂量组(E)、益脉康分散片组(F)。将B、C、D、E、F组大鼠采用烧灼巩膜表浅静脉法建立大鼠慢性高眼压模型。模型大鼠维持高眼压状态2月后开始干预,干预后2周、4周分别用q PCR检测大鼠视网膜GSK-3β及β-catenin mRNA的相对表达量。结果 2周后,与B组比较,各组GSK-3βmRNA表达降低而β-catenin mRNA表达升高,差异有统计学意义(P<0.05)。4周后,与F组比较,C、D、E组GSK-3βmRNA降低,β-catenin mRNA表达升高,差异有统计学意义(P<0.05)。与E组比较,C、D组GSK-3βmRNA降低而β-catenin mRNA表达升高,差异有统计学意义(P<0.05)。结论青光安Ⅱ号方及益脉康分散片均能抑制GSK-3βmRNA的表达,并增加β-catenin mRNA的相对表达量,对慢性高眼压大鼠视网膜神经节细胞有一定的保护作用;初步观察表明复方中药青光安Ⅱ号方在对慢性高眼压大鼠视神经的保护中,效果优于益脉康分散片,且以青光安Ⅱ号方高剂量最优。

miRNA-155对慢性心力衰竭的诊断效能及其与β-catenin mRNA通路的相关性研究

目的探讨miRNA-155对慢性心力衰竭(CHF)的诊断效能及其与β-catenin mRNA通路的相关性。方法选择2018年4月至2020年4月金华市中医院收治的CHF患者67例作为观察组,将同期治疗的非CHF心血管疾病患者45例作为对照1组;并选择同期健康体检者39例作为对照2组。采用实时荧光PCR技术测定3组miRNA-155、β-catenin mRNA通路表达水平;绘制ROC曲线,分析miRNA-155、β-catenin mRNA通路表达水平对CHF的诊断效能;并采用Pearson相关对CHF患者miRNA155与β-catenin mRNA通路表达水平的相关性进行分析。结果观察组miRNA-155表达水平(2.78±0.11)高于对照1组(1.43±0.08)和对照2组(0.12±0.02),β-catenin mRNA表达水平(0.23±0.13)低于对照1组和对照2组(0.99±0.06、2.14±0.03),差异均有统计学意义(均P<0.05);对照1组miRNA-155表达水平高于对照2组(P<0.05),β-catenin mRNA表达水平低于对照2组(P<0.05)。miRNA-155、β-catenin mRNA通路联合测定CHF的诊断灵敏度(0.901)、特异度(0.723)均高于单一miRNA-155、β-catenin mRNA通路测定(均P<0.05)。CHF患者miRNA-155表达水平与β-catenin mRNA通路表达水平呈负相关(r=-0.783,P<0.05)。结论miRNA-155在CHF患者中呈高表达,且与β-catenin mRNA通路表达呈负相关,两者联合测定能获得较高的诊断效能,值得推广应用。

Inhibitory effect of caffeic acid phenethyl ester on the growth of SW480 colorectal tumor cells involvesβ-catenin associated signaling pathway down-regulation

AIM： To study the anti-tumor effect of caffeic acid phenethyl ester （CAPE） and the influence of CAPE on β-catenin associated signaling pathway in SW480 colorectal cancer （CRC） cells. METHODS： SW480 cells were treated with CAPE at serial concentrations. The proliferative status of cells was measured by methabenzthiazuron （MTT） assay. Cell cycle and cell apoptosis were analyzed using flow cytometry （FCM）. Western blotting assay was used to evaluate the protein level of β-catenin, c-myc and cyclinD1. β-catenin localization was determined by indirect immunofluorescence. RESULTS： CAPE displayed a strong inhibitory effect in a significant dose- and time-dependent manner on SW480 cell growth. FCM analysis showed that the ratio of G0/G1 phase cells increased, S phase ratio decreased and apoptosis rate increased after SW480 cells were exposed to CAPE for 24 h. Pretreatment of SW480 cells with CAPE significantly suppressed β-catenin, c-myc and cyclinD1 protein expression. CAPE treatment was associated with decreased accumulation of β-catenin protein in nucleus and cytoplasm, and concurrently increased its accumulation on the surface of cell membrane. CONCLUSION： CAPE can inhibit SW480 cell proliferation by inducing cell cycle arrest and apoptosis. Decreased β-catenin and the associated signaling pathway target gene expression may mediate the anti-tumor effects of CAPE.

Effects of gastrin 17 on β-catenin/Tcf-4 pathway in Colo320WT colon cancer cells

AIM： To explore the effect of gastrin 17 （G17） on β-catenin/T cell factor-4 （Tcf-4） signaling in colonic cancer cell line Colo320WT. METHODS： The pCR3.1/GR plasmid, which expresses gastrin receptor, cholecystokinin-2 receptor （CCK-2R）, was transfected into a colonic cancer cell line Colo320 by Lipofectamine ^TM 2000 and the stably expressing CCK-2R clones were screened by G418. The expression levels of gastrin receptor in the Colo320 and the transfected Colo320WT cell line were assayed by RTPCR. Colo320WT cells were treated with G17 in a time-dependent manner （0, 1, 6, 12, 24 and 48 h）, then with L365,260 （Gastrin17 receptor blocker） for 30 rain, and with G17 again for 12 h or L365,260 for 12 h. Expression levels of β-catenin in a TX-100 soluble fraction and TX-100 insoluble fraction of Colo320WT cells treated with G17 were detected by co-immuniprecipation and Western blot. Immunocytochemistry was used to examine the distribution of β-catenin in CoLoWT320 cells. Expression levels of c-myc and cyclin D1 in Colo320WT cells treated with G17 were assayed by Western blot. RESULTS： Expression levels of β-catenin in the TX-100 solution fraction decreased apparently in a time- dependent fashion and reached the highest level after G17 treatment for 12 h, while expression levels of β-catenin in the TX-100 insoluble fraction were just on the contrary. Immunocytochemistry showed that β-catenin was translocated from the cell membranes into the cytoplasm and nucleus under G17 treatment. Expression levels of c-myc and cyclin D1 in the G17- treated Colo320WT cells were markedly higher compared to the untreated Colo320WT cells. In addition, the aforementioned G17-stimulated responses were blocked by L365,260.CONCLUSION： Gastrin17 activates β-catenin/Tcf-4 signaling in Colo320WT cells, thereby leading to over- expression of c-myc and cyclin D1.

Mechanism of miR-21 via Wnt/β-catenin signaling pathway in human A549 lung cancer cells and Lewis lung carcinoma in mice

Objective:To study the mechanism of effect of miR-21 via Wnt/ β-catenin signaling pathway in human A549 lung cancer cells and Lewis lung carcinoma in mice.Methods:The effect of miR-21 on A549 cells were detected by MTT method.MiR-21 expression levels were overexpressed or inhibited in A549 cells by transfecting with miR-21 mimics or inhibitors.Correlation among key molecules(Wnt1,β-catenin.CyclinD1 and miR-21) of mRNA and protein levels in Wnt/β-catenin signaling pathway were studied by Real-time PCR and Western blot hybridization assay.Invasive ability of A549 cells was determined via Transwell chamber cell invasion assay;the role of miR-21 in A549 cells was explored via the Wnt/β-catenin signaling pathway.A Lewis lung carcinoma animal model was established to detect miR-21 expressions in tumor animals and controlled animal tissues,and verify expression changes of the above moleculesin the Wnt / β-catenin signaling pathway was determined in the animal level.Results:MTT assay results showed that miR-21 overexpression could markedly enhance cell absorbance value;that is,miR-21 could increase the ability proliferation of A549 cells.β-catenin and CyclinD1 expression levels were significantly higher in miR-21 mimic transfected cells(P<0.05),and Wnt 1 gene had no significant change.Wnt 1,β-catenin and CyclinD1 gene expression showed no significant change when miR-21 expression was suppressed,compared with controls.After cells were transfected with miR-21 mimics,cell invasion assay revealed that the perforated cells was significantly higher than the perforated cells in the control group(P<0.01).Lewis lung assay revealed that miR-21 expression levels in the Lewis lung carcinoma were significantly higher;and at the same time.Wnt1,β-catenin and CyclinD1 gene expression levels were significantly increased,compared to controls.Conclusions:In A549 human lung cancer cells and Lewis lung carcinoma in mice,key molecules β-catenin and CyclinD1 of miR-21 expressions and the Wnt/ β-catenin signaling pathway are positively correlated.