Background Inflammatory bowel disease causes intestinal structural damage,impairs gut function,hinders animal growth and development,and reduces farming efficiency.Previous studies demonstrated that lactate alleviates...Background Inflammatory bowel disease causes intestinal structural damage,impairs gut function,hinders animal growth and development,and reduces farming efficiency.Previous studies demonstrated that lactate alleviates dextran sulfate sodium(DSS)-induced inflammation and mitigates weight loss by enhancing intestinal barrier functions.However,the mechanisms underlying lactate-mediated protection of the intestinal epithelial barrier remain unclear.This study aimed to explore the protective effect of lactate on intestinal barrier damage in colitis piglets and the possible underlying mechanisms through in vivo and in vitro experiments.Methods A total of 6021-day-old weaned female piglets were randomly assigned into three groups based on weight:the control group(basal diet with physiological saline gavage),the DSS group(basal diet with 5%DSS gavage),and the DSS+LA group(2%lactate diet with 5%DSS gavage).There were 10 replicates per treatment,with 2 piglets per replicate.Jejunal morphology was assessed via hematoxylin and eosin staining,while Western blotting quantified the protein levels of proliferation markers,including cluster of differentiation 24(CD24),cyclin D1,and wingless/integrated(Wnt)/β-catenin signaling components.In vitro,0.08%DSS and 2–32 mmol/L sodium lactate-treated intestinal porcine epithelial cell line-J2(IPEC-J2)cells(n=4)were assessed for viability(Cell Counting Kit-8 assay),apoptosis(flow cytometry),and proliferation parameters,including cell cycle analysis and Leucine-rich repeat-containing G-protein coupled receptor 5(Lgr5+)stem cell quantification.Results In vivo,DSS administration induced jejunal villus shortening(P<0.05),downregulated protein levels of CD24,cyclin D1,casein kinase 1(CK1),and dishevelled-2(DVL2)(P<0.05).In vitro,DSS promoted apoptosis,inhibited proliferation,diminished the Lgr5+cell populations(P<0.05),and reduced S-phase cell proportions(P<0.05).Conversely,lactate supplementation ameliorated DSS-induced villus atrophy(P<0.05),restored CD24,cyclin D1,CK1,and DVL2 protein levels(P<0.05).Furthermore,in vitro,sodium lactate attenuated DSS-induced apoptosis(P<0.05),enhanced IPEC-J2 proliferation(P<0.05),expanded Lgr5+cells(P<0.05),and increased S-phase progression(P<0.05).Conclusions In summary,lactate ameliorated intestinal barrier damage in DSS-induced colitis by activating the Wnt/β-catenin pathway and restoring the balance between epithelial cell proliferation and apoptosis.This study provides novel mechanistic evidence supporting lactate's therapeutic potential for IBD management.展开更多
BACKGROUND The Danggui-Baishao herb pair is the foundation of a traditional Chinese medicine formula known as Shaoyao decoction,which is widely used in the treatment of colitis.AIM To uncover the mechanisms underlying...BACKGROUND The Danggui-Baishao herb pair is the foundation of a traditional Chinese medicine formula known as Shaoyao decoction,which is widely used in the treatment of colitis.AIM To uncover the mechanisms underlying the anti-colitis effects of the Danggui-Baishao herb pair.METHODS The chemical composition of the herb pair was characterized by high performance liquid chromatography-quadrupoleime of flight mass spectrometry analysis.A mouse model of colitis was induced by administering 2.5%dextran sulfate sodium.The therapeutic effects of the herb pair were evaluated based on body weight changes,colon length,histopathological,intestinal inflammation,and barrier function.To investigate the underlying mechanisms,RNA sequencing,metabolomics,16S rRNA sequencing,metagenomics,and theβ-catenin inhibitor ICG-001 were utilized.Furthermore,molecular docking and dextran sulfate sodiumtreated HCT 116 cells were conducted to explore the protective mechanisms of benzoylpaeoniflorin.RESULTS The herb pair improved body weight,colon length,intestinal inflammation,and barrier function.Additionally,the herb pair upregulated the expression of intestinal stem cells marker leucine-rich repeat-containing G-protein coupled receptor 5 and proliferation-related proteins.RNA sequencing analysis showed that the herb pair activated the Wnt/β-catenin signaling pathway.Metabolomic analysis revealed changes in bile acids composition.Through 16S rRNA and metagenomic sequencing,it was observed that the herb pair modulated the gut microbiota,with an enrichment of probiotics and a depletion of pathogenic bacteria.Following intraperitoneal injection of antagonist ICG-001,the therapeutic efficacy was diminished.Molecular docking showed that benzoylpaeoniflorin can bind toβ-catenin.Furthermore,benzoylpaeoniflorin can activated the Wnt/β-catenin signaling pathway and the therapeutic efficacy was also diminished by the ICG-001 in vitro.CONCLUSION The herb pair effectively reduces colonic inflammation and maintains the integrity of the intestinal barrier.Moreover,the anti-colitis efficacy of the herb pair is closely associated with activation of the Wnt/β-catenin pathway.展开更多
Background:Hepatocellular carcinoma(HCC)is a highly lethal malignancy driven by both intrinsic oncogenic pathways and immune microenvironmental regulation.Emerging evidence suggests that DNASE1L3 may influence tumor b...Background:Hepatocellular carcinoma(HCC)is a highly lethal malignancy driven by both intrinsic oncogenic pathways and immune microenvironmental regulation.Emerging evidence suggests that DNASE1L3 may influence tumor biology and immune responses;however,its specific roles in HCC progression and macrophage-mediated regulation remain unclear.This study aimed to elucidate the biological functions of DNASE1L3 in HCC and to determine how it modulates tumor behavior and immune interactions.Methods:Bioinformatics analyses of the GSE41804 and Cancer Genome Atlas-Liver Hepatocellular Carcinoma(TCGA-LIHC)datasets were used to identify hub genes.Functional assays assessed the impact of DNASE1L3 on HCC cell proliferation,migration,invasion,and cell cycle progression.The effects of DNASE1L3 on macrophage polarization and the Wnt/β-catenin signaling pathway were examined using a co-culture system.An HCC organoid model was established to further validate its regulatory function.Results:Eight prognostic signature genes were identified,with deoxyribonuclease I-like 3(DNase I-like 3)selected as the hub gene.DNASE1L3 overexpression suppressed HCC cell growth,inhibited migration and invasion,induced G1 arrest,and modulated epithelial-mesenchymal transition(EMT)markers.DNASE1L3 knockdown promoted M2-like macrophage polarization.Mechanistically,DNASE1L3 interacted withβ-catenin to enhance its ubiquitination and degradation,thereby inhibiting Wnt/β-catenin signaling and reducing PD-L1 expression.DNASE1L3 overexpression similarly restricted organoid growth and suppressed pathway activity.Conclusion:DNASE1L3 acts as a negative regulator of HCC progression by targeting the Wnt/β-catenin pathway and reducing PD-L1 expression,thereby influencing both tumor cell behavior and macrophage-mediated immune responses.展开更多
DACRGROUND Colorectal cancer(CRC)is a leading cause of cancer-related mortality worldwide,and treatment for advanced disease remains challenging.The natural compound icaritin has demonstrated anti-tumor properties,how...DACRGROUND Colorectal cancer(CRC)is a leading cause of cancer-related mortality worldwide,and treatment for advanced disease remains challenging.The natural compound icaritin has demonstrated anti-tumor properties,however its effects on CRC metastasis are not fully understood.AIM To investigate the inhibitory effects of icaritin on CRC and its underlying mechanism of action.METHODS The impact of icaritin on CRC cell invasion and migration was evaluated using in vitro and in vivo approaches.The viability of HCT116 and SW620 cells was assessed using the cell counting kit-8 assay.Epithelial-mesenchymal transition and Wnt/β-catenin signaling related proteins were analyzed by western blotting and immunofluorescence.Cell migration and invasion were evaluated using Transwell assays.Additionally,an orthotopic xenograft tumor model was established to provide further insights.RESULTS Icaritin significantly inhibited HCT116 and SW620 cell proliferation in a time-dependent manner and promoted apoptosis,as determined by flow cytometry analysis of apoptotic markers.It also suppressed cell migration and invasion.At the molecular level,icaritin downregulated the expression of N-cadherin,Snail,β-catenin,matrix metalloproteinase 2,and matrix metalloproteinase 9,while upregulating E-cadherin and adenomatous polyposis coli.In a mouse xenograft model,icaritin treatment significantly reduced tumor volume and weight compared to the control group.CONCLUSION Icaritin inhibits CRC cell invasion and metastasis by preventing epithelial-mesenchymal transition and suppressing the Wnt/β-catenin signaling pathway,highlighting its potential as a therapeutic agent for CRC.展开更多
基金funded by the Sichuan Science and Technology Program(2021ZDZX0009)the earmarked fund from the National Natural Science Foundation of China(31972577)。
摘要Background Inflammatory bowel disease causes intestinal structural damage,impairs gut function,hinders animal growth and development,and reduces farming efficiency.Previous studies demonstrated that lactate alleviates dextran sulfate sodium(DSS)-induced inflammation and mitigates weight loss by enhancing intestinal barrier functions.However,the mechanisms underlying lactate-mediated protection of the intestinal epithelial barrier remain unclear.This study aimed to explore the protective effect of lactate on intestinal barrier damage in colitis piglets and the possible underlying mechanisms through in vivo and in vitro experiments.Methods A total of 6021-day-old weaned female piglets were randomly assigned into three groups based on weight:the control group(basal diet with physiological saline gavage),the DSS group(basal diet with 5%DSS gavage),and the DSS+LA group(2%lactate diet with 5%DSS gavage).There were 10 replicates per treatment,with 2 piglets per replicate.Jejunal morphology was assessed via hematoxylin and eosin staining,while Western blotting quantified the protein levels of proliferation markers,including cluster of differentiation 24(CD24),cyclin D1,and wingless/integrated(Wnt)/β-catenin signaling components.In vitro,0.08%DSS and 2–32 mmol/L sodium lactate-treated intestinal porcine epithelial cell line-J2(IPEC-J2)cells(n=4)were assessed for viability(Cell Counting Kit-8 assay),apoptosis(flow cytometry),and proliferation parameters,including cell cycle analysis and Leucine-rich repeat-containing G-protein coupled receptor 5(Lgr5+)stem cell quantification.Results In vivo,DSS administration induced jejunal villus shortening(P<0.05),downregulated protein levels of CD24,cyclin D1,casein kinase 1(CK1),and dishevelled-2(DVL2)(P<0.05).In vitro,DSS promoted apoptosis,inhibited proliferation,diminished the Lgr5+cell populations(P<0.05),and reduced S-phase cell proportions(P<0.05).Conversely,lactate supplementation ameliorated DSS-induced villus atrophy(P<0.05),restored CD24,cyclin D1,CK1,and DVL2 protein levels(P<0.05).Furthermore,in vitro,sodium lactate attenuated DSS-induced apoptosis(P<0.05),enhanced IPEC-J2 proliferation(P<0.05),expanded Lgr5+cells(P<0.05),and increased S-phase progression(P<0.05).Conclusions In summary,lactate ameliorated intestinal barrier damage in DSS-induced colitis by activating the Wnt/β-catenin pathway and restoring the balance between epithelial cell proliferation and apoptosis.This study provides novel mechanistic evidence supporting lactate's therapeutic potential for IBD management.
基金Supported by National Natural Science Foundation of China,No.82405050,No.82270567,and No.82100564Fundamental Research Funds for the Central Universities,China,No.3332024017.
摘要BACKGROUND The Danggui-Baishao herb pair is the foundation of a traditional Chinese medicine formula known as Shaoyao decoction,which is widely used in the treatment of colitis.AIM To uncover the mechanisms underlying the anti-colitis effects of the Danggui-Baishao herb pair.METHODS The chemical composition of the herb pair was characterized by high performance liquid chromatography-quadrupoleime of flight mass spectrometry analysis.A mouse model of colitis was induced by administering 2.5%dextran sulfate sodium.The therapeutic effects of the herb pair were evaluated based on body weight changes,colon length,histopathological,intestinal inflammation,and barrier function.To investigate the underlying mechanisms,RNA sequencing,metabolomics,16S rRNA sequencing,metagenomics,and theβ-catenin inhibitor ICG-001 were utilized.Furthermore,molecular docking and dextran sulfate sodiumtreated HCT 116 cells were conducted to explore the protective mechanisms of benzoylpaeoniflorin.RESULTS The herb pair improved body weight,colon length,intestinal inflammation,and barrier function.Additionally,the herb pair upregulated the expression of intestinal stem cells marker leucine-rich repeat-containing G-protein coupled receptor 5 and proliferation-related proteins.RNA sequencing analysis showed that the herb pair activated the Wnt/β-catenin signaling pathway.Metabolomic analysis revealed changes in bile acids composition.Through 16S rRNA and metagenomic sequencing,it was observed that the herb pair modulated the gut microbiota,with an enrichment of probiotics and a depletion of pathogenic bacteria.Following intraperitoneal injection of antagonist ICG-001,the therapeutic efficacy was diminished.Molecular docking showed that benzoylpaeoniflorin can bind toβ-catenin.Furthermore,benzoylpaeoniflorin can activated the Wnt/β-catenin signaling pathway and the therapeutic efficacy was also diminished by the ICG-001 in vitro.CONCLUSION The herb pair effectively reduces colonic inflammation and maintains the integrity of the intestinal barrier.Moreover,the anti-colitis efficacy of the herb pair is closely associated with activation of the Wnt/β-catenin pathway.
基金funded by Shanghai Science and Technology Innovation Action Plan Project(22140901100)Shanghai Key Laboratory of Molecular Imaging(18DZ2260400)Shanghai University of Medicine and Health Science Seed Fund(SSF-24-21-01).
摘要Background:Hepatocellular carcinoma(HCC)is a highly lethal malignancy driven by both intrinsic oncogenic pathways and immune microenvironmental regulation.Emerging evidence suggests that DNASE1L3 may influence tumor biology and immune responses;however,its specific roles in HCC progression and macrophage-mediated regulation remain unclear.This study aimed to elucidate the biological functions of DNASE1L3 in HCC and to determine how it modulates tumor behavior and immune interactions.Methods:Bioinformatics analyses of the GSE41804 and Cancer Genome Atlas-Liver Hepatocellular Carcinoma(TCGA-LIHC)datasets were used to identify hub genes.Functional assays assessed the impact of DNASE1L3 on HCC cell proliferation,migration,invasion,and cell cycle progression.The effects of DNASE1L3 on macrophage polarization and the Wnt/β-catenin signaling pathway were examined using a co-culture system.An HCC organoid model was established to further validate its regulatory function.Results:Eight prognostic signature genes were identified,with deoxyribonuclease I-like 3(DNase I-like 3)selected as the hub gene.DNASE1L3 overexpression suppressed HCC cell growth,inhibited migration and invasion,induced G1 arrest,and modulated epithelial-mesenchymal transition(EMT)markers.DNASE1L3 knockdown promoted M2-like macrophage polarization.Mechanistically,DNASE1L3 interacted withβ-catenin to enhance its ubiquitination and degradation,thereby inhibiting Wnt/β-catenin signaling and reducing PD-L1 expression.DNASE1L3 overexpression similarly restricted organoid growth and suppressed pathway activity.Conclusion:DNASE1L3 acts as a negative regulator of HCC progression by targeting the Wnt/β-catenin pathway and reducing PD-L1 expression,thereby influencing both tumor cell behavior and macrophage-mediated immune responses.
摘要DACRGROUND Colorectal cancer(CRC)is a leading cause of cancer-related mortality worldwide,and treatment for advanced disease remains challenging.The natural compound icaritin has demonstrated anti-tumor properties,however its effects on CRC metastasis are not fully understood.AIM To investigate the inhibitory effects of icaritin on CRC and its underlying mechanism of action.METHODS The impact of icaritin on CRC cell invasion and migration was evaluated using in vitro and in vivo approaches.The viability of HCT116 and SW620 cells was assessed using the cell counting kit-8 assay.Epithelial-mesenchymal transition and Wnt/β-catenin signaling related proteins were analyzed by western blotting and immunofluorescence.Cell migration and invasion were evaluated using Transwell assays.Additionally,an orthotopic xenograft tumor model was established to provide further insights.RESULTS Icaritin significantly inhibited HCT116 and SW620 cell proliferation in a time-dependent manner and promoted apoptosis,as determined by flow cytometry analysis of apoptotic markers.It also suppressed cell migration and invasion.At the molecular level,icaritin downregulated the expression of N-cadherin,Snail,β-catenin,matrix metalloproteinase 2,and matrix metalloproteinase 9,while upregulating E-cadherin and adenomatous polyposis coli.In a mouse xenograft model,icaritin treatment significantly reduced tumor volume and weight compared to the control group.CONCLUSION Icaritin inhibits CRC cell invasion and metastasis by preventing epithelial-mesenchymal transition and suppressing the Wnt/β-catenin signaling pathway,highlighting its potential as a therapeutic agent for CRC.