Metabolic Dysfunction-Associated Steatotic Liver Disease(MASLD)has emerged as a predominant cause of chronic liver disease globally,with its prevalence rising steadily each year.If left untreated,MASLD may progress to...Metabolic Dysfunction-Associated Steatotic Liver Disease(MASLD)has emerged as a predominant cause of chronic liver disease globally,with its prevalence rising steadily each year.If left untreated,MASLD may progress to metabolic dysfunction in associated steatohepatitis(MASH),a more severe condition that can irreversibly advance to liver fibrosis,cirrhosis,and even hepatocyte carcinoma(HCC).Recent studies have illuminated a pivotal link between dysregulated cholesterol metabolism and the pathogenesis and severity of MASLD.This underscores the critical need for a comprehensive exploration of the regulatory mechanisms underlying hepatic cholesterol metabolism in MASLD,as such insights could unveil new therapeutic targets and pave the way for early diagnosis and effective prevention strategies.Cyclocarya paliurus(Batal.)Iljinskaja,a plant known for both medicinal and dietary applications,has demonstrated diverse pharmacological properties,including hypoglycemic,lipid-regulating,and hepatoprotective effects.This study aimed to investigate the hypolipidemic and hepatoprotective activities of Cyclocarya paliurus extract(CCE)in a murine model of MASLD induced by a methionine-choline-deficient(MCD)diet.Simvastatin was employed as a positive control drug,while various doses of CCE were administered to assess its therapeutic potential.Meanwhile,the control and model groups received 0.5%sodium carboxymethyl cellulose(CMC-Na)once daily for 6 weeks.At the end of the treatment period,blood and liver samples were collected for biochemical analysis,histopathological assessment,and gene expression profiling.The findings revealed that CCE significantly reduced serum levels of aspartate aminotransferase(AST)and alanine aminotransferase(ALT)while enhancing the activities of cholinesterase(CHE)and high-density lipoprotein cholesterol(HDL-C).In liver tissues,CCE markedly decreased the levels of total cholesterol(TC)and triglycerides(TG),while simultaneously increasing hepatic HDL-C content.Histological analyses showed notable alleviation of pathological liver damage in CCE-treated mice.Molecular studies further demonstrated that CCE downregulated the expression of key genes and proteins involved in cholesterol synthesis,including SREBP2,LDLR,and HMGCR.Concurrently,it upregulated the expression of genes and proteins related to cholesterol transport,such as ABCG5 and ABCG8.Additionally,CCE mitigated inflammation by improving the expression levels of pro-inflammatory cytokines,including TNF-α and IL-6,and modulated oxidative stress markers,such as NRF2,KEAP1,and NQO1.Protein expression analyses revealed reduced levels of IL-6 and IL-1β,further corroborating its anti-inflammatory effects.In summary,C.paliurus exhibited potent hepatoprotective effects in MCD-induced MASLD mice.These protective mechanisms were closely linked to the upregulation of cholesterol transporters ABCG5/8 and the modulation of sterol regulatory element-binding protein 2(SREBP2).This study highlighted the therapeutic potential of C.paliurus as a promising intervention for MASLD and underscored its role in regulating cholesterol metabolism and mitigating inflammation and oxidative stress.展开更多
Metabolic dysfunction-associated steatotic liver disease(MASLD)lacks effective pharmacotherapies.This study evaluated the nutritional interventions of Umbelliferone(UMB),a natural coumarin from fruits,on MASLD using a...Metabolic dysfunction-associated steatotic liver disease(MASLD)lacks effective pharmacotherapies.This study evaluated the nutritional interventions of Umbelliferone(UMB),a natural coumarin from fruits,on MASLD using a combination of in vitro colonic fermentation,a high-fat diet(HFD)-induced mouse model,and oleic acid-treated HepG2 cells.Biochemical,histological,and molecular analyses were performed to evaluate metabolic and microbial changes.UMB exhibited prebiotic properties,enhancing microbial diversity and butyrate production.It significantly reduced serum lipids,ALT/AST levels,and hepatic steatosis in HFD-mice.In hepatocytes,UMB activated AMPK signaling,inhibiting lipogenesis and promoting fatty acid oxidation.Furthermore,UMB restored gut microbiota balance and increased short-chain fatty acids.These results indicate that UMB alleviates MASLD by modulating hepatic metabolic function and gut microbiota homeostasis,highlighting its dual therapeutic role targeting the gut-liver axis.展开更多
Metabolic dysfunction-associated steatotic liver disease(MASLD),previously known as nonalcoholic fatty liver disease(NAFLD),is the most prevalent chronic liver disease worldwide,with an estimated global prevalence of ...Metabolic dysfunction-associated steatotic liver disease(MASLD),previously known as nonalcoholic fatty liver disease(NAFLD),is the most prevalent chronic liver disease worldwide,with an estimated global prevalence of approximately 30%;however,effective pharmacotherapies are still limited due to its complex pathogenesis and etiology.Therefore,a more thorough understanding of disease pathogenesis is urgently needed.An increasing number of studies suggest that MASLD and its progressive form,metabolic dysfunction-associated steatohepatitis(MASH),are driven by chronic overnutrition,multiple genetic susceptibility factors,and pathogenic consequences,including hepatocyte damage and liver inflammation.Hepatic inflammation is the key event fueling the conversion from simple steatosis to steatohepatitis and fibrosis.Current therapies for MASH,including the recently approved thyroid hormone receptor-beta agonist resmetirom or the available incretin mimetics,mainly target metabolic injury to the liver but not inflammation directly.In this review,we provide an in-depth discussion of current data related to the immunological mechanisms of MASLD and summarize the effects of current and experimental therapies on immunoregulation in MASLD.展开更多
Aims:The synergistic impact of alcohol consumption and cardiometabolic risk factors(CMRFs)on liver health remains unclear.Herein,we aimed to investigate the interplay between varying levels of alcohol consumption and ...Aims:The synergistic impact of alcohol consumption and cardiometabolic risk factors(CMRFs)on liver health remains unclear.Herein,we aimed to investigate the interplay between varying levels of alcohol consumption and the number of CMRFs on all-cause mortality in individuals with metabolic dysfunction-associated steatotic liver disease(MASLD)and metabolic and alcohol-associated liver disease(MetALD).Methods:Adult participants with ultrasound-proven hepatic steatosis were identified using the Third National Health and Nutrition Examination Survey(NHANES III)database.Multivariate Cox regression was applied to investigate the association between incremental alcohol consumption and the number of CMRFs,with all-cause mortality as the outcome.The E-value was calculated to assess the robustness of the associations,and additive interaction models were used to explore the synergistic effects of alcohol consumption and CMRFs on mortality.Results:A total of 2161 individuals(1957 with MASLD and 204 with MetALD)between the Years 1988 and 1994 were included in the analysis.During a follow-up period of 51,719 person-years,the overall mortality rate was 1.46%per person-year.Stratification by age showed an increased mortality risk associated with CMRFs and alcohol consumption in individuals aged<65 years,especially among those with 3-5 CMRFs(hazard ratio:3.15-5.71,all p<0.05).Additive interaction models also supported a synergistic effect in this subgroup,while no such trend was observed in those aged≥65 years.Conclusion:Among individuals with MASLD/MetALD and MASLD alone,a significant synergistic effect between alcohol consumption and CMRFs on mortality risk was found in those aged<65 years.This suggests an age-stratified approach for managing modifiable risk factors in individuals with MASLD or MetALD.展开更多
Metabolic dysfunction-associated steatotic liver disease(MASLD),the most prevalent chronic liver condition globally,lacks adequate and effective therapeutic remedies in clinical practice.Recent studies have increasing...Metabolic dysfunction-associated steatotic liver disease(MASLD),the most prevalent chronic liver condition globally,lacks adequate and effective therapeutic remedies in clinical practice.Recent studies have increasingly highlighted the close connection between the ubiquitin–proteasome system(UPS)and the progression of MASLD.This relationship is crucial for understanding the disease's underlying mechanism.As a sophisticated process,the UPS govern protein stability and function,maintaining protein homeostasis,thus influencing a multitude of elements and biological events of eukaryotic cells.It comprises four enzyme families,namely,ubiquitin-activating enzymes(E1),ubiquitin-conjugating enzymes(E2),ubiquitin-protein ligases(E3),and deubiquitinating enzymes(DUBs).This review aims to delve into the array of pathways and therapeutic targets implicated in the ubiquitination within the pathogenesis of MASLD.Therefore,this review unveils the role of ubiquitination in MASLD while spotlighting potential therapeutic targets within the context of this disease.展开更多
The new European clinical practice guidelines from three scientific societies(European Association for the Study of the Liver,European Association for the Study of Diabetes and European Association for the Study of Ob...The new European clinical practice guidelines from three scientific societies(European Association for the Study of the Liver,European Association for the Study of Diabetes and European Association for the Study of Obesity)on the management of metabolic dysfunction-associated steatotic liver disease(MASLD)provide detailed recommendations on diagnosis,risk stratification,monitoring strategies,treatment and prevention.Lifestyle interventions(eg,weight reduction,Mediterranean diet,exercise,alcohol abstinence)and the treatment of cardiometabolic risk factors continue to be the mainstay of treatment and prevention of the disease.Incretin mimetics that are approved to treat obesity and/or type 2 diabetes such as semaglutide and tirzepatide have benefits for ameliorating metabolic dysfunction-associated steatohepatitis(MASH).Novel developments include adapted strategies for screening(case finding)using non-invasive tests(NITs)with a focus on detecting fibrosis or cirrhosis,risk-adjusted monitoring of MASLD by NITs as well as the recommendation to use,if locally approved,the thyroid hormone receptorβ-agonist resmetirom in patients with non-cirrhotic MASH fibrosis(≥F2 stage).展开更多
Metabolic dysfunction-associated steatotic liver disease(MASLD)is a global health burden that requires early screening,diagnosis,and intervention MASLD is a leading cause of chronic liver disease globally,with an esti...Metabolic dysfunction-associated steatotic liver disease(MASLD)is a global health burden that requires early screening,diagnosis,and intervention MASLD is a leading cause of chronic liver disease globally,with an estimated prevalence of 38%worldwide(1,2).MASLD is the new term that replaces what was previously known as non-alcoholic fatty liver disease(NAFLD).展开更多
Background Metabolic dysfunction-associated steatotic liver disease(MASLD)is the leading cause of chronic liver disease globally,with rising prevalence linked to metabolic syndrome(MetS).Excessive liver fat accumulati...Background Metabolic dysfunction-associated steatotic liver disease(MASLD)is the leading cause of chronic liver disease globally,with rising prevalence linked to metabolic syndrome(MetS).Excessive liver fat accumulation(steatosis)worsens disease progression and MASLD prognosis.Moreover,gut microbiota dysbiosis might promote steatosis,accelerating the disease progression to severe stages.Identifying gut microbiota signatures specific to steatosis severity might improve its diagnosis and inform personalised interventions in MASLD.This study aimed to characterise associations between gut microbiota composition and hepatic steatosis severity in a cohort of patients with MASLD/MetS.Ultimately,we aimed to assess the potential for microbiota features to enhance the diagnosis of severe steatosis.Methods A cross-sectional cohort of 61 patients with MetS with extensive clinical history was recruited at different stages of MASLD.Transient elastography was used to evaluate liver fibrosis and steatosis severity.Participants’faecal microbiota were profiled using 16S rRNA gene sequencing.Statistical analyses first identified correlations between microbiota profiles and patients’phenotypes,while disentangling important confounders such as medication.Identified features were then used to build predictive models for diagnosing severe steatosis.Results High steatosis severity was distinctly associated with a higher prevalence of the inflammation-associated Bacteroides 2(Bact2)-enterotype,accompanied by a lower proportion of beneficial commensals(eg,Akkermansia)and a higher proportion of opportunistic bacteria(eg,Streptococcus).Patients harbouring a Bact2-enterotype reached severe steatosis at lower Fatty Liver Index(FLI)thresholds.Using Bact2-carrier status together with FLI in a predictive model significantly improved the classification of severe steatosis(accuracy 90%,receiver operating characteristics 96%)when compared with FLI alone.Conclusion Gut microbiota composition and dysbiosis(defined as Bact2-enterotype)are distinctly associated with steatosis severity in MASLD/MetS.Patient stratification by microbiota composition enhances the diagnostic classification of severe steatosis in MASLD,suggesting a potential for personalised interventions in patients with microbiota dysbiosis.展开更多
The prevalence of cirrhosis and hepatocellular carcinoma resulting from metabolic dysfunction-associated steatotic liver disease(MASLD)is increasing,posing a significant burden on both the economy and public health(1,...The prevalence of cirrhosis and hepatocellular carcinoma resulting from metabolic dysfunction-associated steatotic liver disease(MASLD)is increasing,posing a significant burden on both the economy and public health(1,2).Although the need for effective therapeutic strategies for MASLD is growing,pharmacologic options remain limited,with resmetirom currently the only approved drug.Consequently,lifestyle modification-particularly weight reduction through diet and exercise-remains the cornerstone of MASLD management.展开更多
Introduction:Advances in HIV management have transformed HIV into a chronic condition,resulting in improved prognosis and increased survival among people living with HIV(PLWH).Traditional risk factors for metabolic dy...Introduction:Advances in HIV management have transformed HIV into a chronic condition,resulting in improved prognosis and increased survival among people living with HIV(PLWH).Traditional risk factors for metabolic dysfunction-associated steatotic liver disease(MASLD)—including dyslipidemia—are prevalent in PLWH.This systematic review and meta-analysis aim to synthesize current evidence on lipid profile disturbances as contributors to MASLD in PLWH.Methods:This systematic review and meta-analysis were conducted according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses(PRISMA)guidelines and registered in PROSPERO with registration number CRD420251054477.We searched seven databases to identify studies reporting the prevalence and characteristics of MASLD in PLWH.Meta-analysis was conducted using Review Manager 5.4.1.Mean differences(MDs)were calculated using a random-effects model.Risk of bias was assessed using the ROBINS-E tool.Results:A total of 17 studies comprising 3933 HIV-positive participants were included,among whom 1226(37%)had MASLD.Male sex was significantly associated with MASLD(OR=1.57;95%CI:1.13-2.17;p=0.007).MASLD was significantly associated with higher body mass index(BMI)(MD=3.23 kg/m^(2);p<0.00001).Lipid profile analysis revealed that MASLD patients had higher total cholesterol(MD=6.62 mg/dL;p=0.01),low density lipoprotein(LDL)(MD=3.83 mg/dL;p=0.01),triglycerides(MD=63.02 mg/dL;p<0.00001),and lower high density lipoprotein(HDL)(MD=-3.73 mg/dL;p<0.0001).Conclusion:This study demonstrates a significant difference in lipid profiles(higher total cholesterol,LDL,triglycerides,and lower HDL)among PLWH who develop MASLD,suggesting a potential metabolic signature associated with this comorbidity.展开更多
Metabolic dysfunction-associated steatotic liver disease(MASLD)is now considered to be among the most prevalent chronic liver diseases worldwide.Its comprehensive management encompasses multiple stages,including risk ...Metabolic dysfunction-associated steatotic liver disease(MASLD)is now considered to be among the most prevalent chronic liver diseases worldwide.Its comprehensive management encompasses multiple stages,including risk assessment,early detection,stratified intervention,and long-term follow-up.Among these,improving diagnostic accuracy and optimizing individualized therapeutic strategies remain key challenges in both research and clinical practice.In recent years,artificial intelligence and smart devices have developed rapidly and have gradually been applied in the medical field,offering novel tools and pathways for MASLD risk stratification,non-invasive diagnosis,therapeutic evaluation,and patient self-management.This review summarizes the current applications of artificial intelligence and smart devices in MASLD care,highlights their benefits and limitations,and discusses future directions to support precision diagnosis and treatment strategies.展开更多
The liver is increasingly recognized as a major regulator of systemic cardio-renal-metabolic health.Evidence is mounting that sex-chromosome dosage per se itself,independent of gonadal sex hormones,modulates hepatic p...The liver is increasingly recognized as a major regulator of systemic cardio-renal-metabolic health.Evidence is mounting that sex-chromosome dosage per se itself,independent of gonadal sex hormones,modulates hepatic physiology and liver disease risk.Turner syndrome(TS;monosomy X)and Klinefelter syndrome(KS;47,XXY and variants)are the two most common sex-chromosome aneuploidies and carry a clinically relevant,yet often under-appreciated,burden of liver disease.Population studies show that individuals with TS have 2-to sixfold higher odds of raised liver enzymes,steatotic liver disease,advanced fibrosis,and even hepatocellular malignancy compared with to sex-and age-matched controls.In KS,the prevalence of metabolic dysfunction-associated steatotic liver disease(MASLD)reaches approximately 45%,with testosterone deficiency,visceral adiposity,and systemic inflammation acting as key drivers.Pathogenetic mechanisms converge on vascular dysgenesis and estrogen deficiency in TS,and on hypogonadism-related metabolic derangements in KS,together accelerating steatosis,inflammation,and fibrogenesis.This concise review/Comprehensive perspective reviews discusses historical background,epidemiology,hepatic phenotypes,pathophysiology,and current diagnostic and management recommendations.It also highlights critical knowledge gaps,including the need for prospective cohorts,optimized hormone-replacement protocols,and trials of emerging pharmacological approaches anti-MASH agents.Raising awareness among all stakeholders,endocrinologists,hepatologists,and primary-care physicians is essential for early detection,multidisciplinary management,and improved hepatic and extra-hepatic outcomes in these vulnerable patient populations.展开更多
Background and AimsHepatic iron deposition(HID)in the reticuloendothelial system(RES)is associated with histological severity in metabolic dysfunction-associated steatotic liver disease(MASLD).This study aimed to asse...Background and AimsHepatic iron deposition(HID)in the reticuloendothelial system(RES)is associated with histological severity in metabolic dysfunction-associated steatotic liver disease(MASLD).This study aimed to assess the interaction between the transferrin(TF)-rs1049296 C>T variant and HID patterns on the risk of significant liver fibrosis in MASLD.MethodsWe analyzed 406 adults with liver biopsy-confirmed MASLD.HID was categorized as hepatocellular,RES,or mixed,based on Perl's iron staining.The association between iron-related genetic variants and significant liver fibrosis(fibrosis stage≥F2)was analyzed,focusing on the interactions between single-nucleotide polymorphism genotypes and iron deposition patterns.Multivariable logistic regression analysis was used to adjust for potential confounders.ResultsHID was detected in 271(66.7%)patients,with hepatocellular,RES,and mixed patterns accounting for 11.1%,18.0%,and 37.7%,respectively.A significant interaction was observed between HID and the TF-rs1049296 genotype(P=0.035 for interaction).In multivariable analysis,male sex,hypertension,severe lobular inflammation,and mixed hepatocellular/RES iron deposition were independent predictors of significant liver fibrosis.RES deposition markedly increased the risk of significant liver fibrosis(adjusted odds ratio:6.65;95%confidence interval:1.84-23.97,p<0.05),particularly in men with isolated RES iron deposition(adjusted odds ratio:5.26;95%confidence interval:1.21-22.81,p<0.05).ConclusionsThe TF-rs1049296 T allele interacts with RES iron deposition to identify a MASLD subpopulation at elevated risk of progressive liver disease,providing opportunities for refined risk stratification and personalized management.展开更多
MASLD in China:an under-recognized public health problem Epidemic characteristics of metabolic dysfunction-associated steatotic liver disease(MASLD)in China As one of the most common chronic non-infectious liver disea...MASLD in China:an under-recognized public health problem Epidemic characteristics of metabolic dysfunction-associated steatotic liver disease(MASLD)in China As one of the most common chronic non-infectious liver diseases,metabolic dysfunction-associated steatotic liver disease(MASLD),previously known as non-alcoholic fatty liver disease(NAFLD),affects one quarter of the world’s population,is closely related to diabetes and obesity[1,2].展开更多
Metabolic dysfunction-associated steatotic liver disease(MASLD)remains a rapidly growing global health burden.Here,we report that the nonessential amino acid(NEAA)transporter SLC7A11 plays a key role in MASLD.In patie...Metabolic dysfunction-associated steatotic liver disease(MASLD)remains a rapidly growing global health burden.Here,we report that the nonessential amino acid(NEAA)transporter SLC7A11 plays a key role in MASLD.In patients with MASLD,we found high expression levels of SLC7A11 that were correlated directly with clinical grade.Using both loss-of-function and gain-of-function genetic models,we found that Slc7a11 deficiency accelerated MASLD progression via classic cystine/cysteine deficiencyinduced ferroptosis,while serine deficiency and a resulting impairment in de novo cysteine production were attributed to ferroptosis-induced MASLD progression in mice overexpressing hepatic Slc7a11.Consistent with these findings,we found that both serine supplementation and blocking ferroptosis significantly alleviated MASLD,and the serum serine/glutamate ratio was significantly lower in these preclinical disease models,suggesting that it might serve as a prognostic biomarker for MASLD in patients.These findings indicate that defects in NEAA metabolism are involved in the progression of MASLD and that serine deficiency-triggered ferroptosis may provide a therapeutic target for its treatment.展开更多
基金National Key Research and Development Program of China(Grant No.2022YFC3501700)the Beijing Municipal Natural Science Foundation(Grant No.7144219).
文摘Metabolic Dysfunction-Associated Steatotic Liver Disease(MASLD)has emerged as a predominant cause of chronic liver disease globally,with its prevalence rising steadily each year.If left untreated,MASLD may progress to metabolic dysfunction in associated steatohepatitis(MASH),a more severe condition that can irreversibly advance to liver fibrosis,cirrhosis,and even hepatocyte carcinoma(HCC).Recent studies have illuminated a pivotal link between dysregulated cholesterol metabolism and the pathogenesis and severity of MASLD.This underscores the critical need for a comprehensive exploration of the regulatory mechanisms underlying hepatic cholesterol metabolism in MASLD,as such insights could unveil new therapeutic targets and pave the way for early diagnosis and effective prevention strategies.Cyclocarya paliurus(Batal.)Iljinskaja,a plant known for both medicinal and dietary applications,has demonstrated diverse pharmacological properties,including hypoglycemic,lipid-regulating,and hepatoprotective effects.This study aimed to investigate the hypolipidemic and hepatoprotective activities of Cyclocarya paliurus extract(CCE)in a murine model of MASLD induced by a methionine-choline-deficient(MCD)diet.Simvastatin was employed as a positive control drug,while various doses of CCE were administered to assess its therapeutic potential.Meanwhile,the control and model groups received 0.5%sodium carboxymethyl cellulose(CMC-Na)once daily for 6 weeks.At the end of the treatment period,blood and liver samples were collected for biochemical analysis,histopathological assessment,and gene expression profiling.The findings revealed that CCE significantly reduced serum levels of aspartate aminotransferase(AST)and alanine aminotransferase(ALT)while enhancing the activities of cholinesterase(CHE)and high-density lipoprotein cholesterol(HDL-C).In liver tissues,CCE markedly decreased the levels of total cholesterol(TC)and triglycerides(TG),while simultaneously increasing hepatic HDL-C content.Histological analyses showed notable alleviation of pathological liver damage in CCE-treated mice.Molecular studies further demonstrated that CCE downregulated the expression of key genes and proteins involved in cholesterol synthesis,including SREBP2,LDLR,and HMGCR.Concurrently,it upregulated the expression of genes and proteins related to cholesterol transport,such as ABCG5 and ABCG8.Additionally,CCE mitigated inflammation by improving the expression levels of pro-inflammatory cytokines,including TNF-α and IL-6,and modulated oxidative stress markers,such as NRF2,KEAP1,and NQO1.Protein expression analyses revealed reduced levels of IL-6 and IL-1β,further corroborating its anti-inflammatory effects.In summary,C.paliurus exhibited potent hepatoprotective effects in MCD-induced MASLD mice.These protective mechanisms were closely linked to the upregulation of cholesterol transporters ABCG5/8 and the modulation of sterol regulatory element-binding protein 2(SREBP2).This study highlighted the therapeutic potential of C.paliurus as a promising intervention for MASLD and underscored its role in regulating cholesterol metabolism and mitigating inflammation and oxidative stress.
基金supported by the Chinese Medicine Development Fund(grant number:24B2/029A)Hong Kong Research Grants Council General Research Fund(grant number:14104923)State Key Laboratory of Agrobiotechnology Research Fund(grant numbers:8300068 and 8300041).
文摘Metabolic dysfunction-associated steatotic liver disease(MASLD)lacks effective pharmacotherapies.This study evaluated the nutritional interventions of Umbelliferone(UMB),a natural coumarin from fruits,on MASLD using a combination of in vitro colonic fermentation,a high-fat diet(HFD)-induced mouse model,and oleic acid-treated HepG2 cells.Biochemical,histological,and molecular analyses were performed to evaluate metabolic and microbial changes.UMB exhibited prebiotic properties,enhancing microbial diversity and butyrate production.It significantly reduced serum lipids,ALT/AST levels,and hepatic steatosis in HFD-mice.In hepatocytes,UMB activated AMPK signaling,inhibiting lipogenesis and promoting fatty acid oxidation.Furthermore,UMB restored gut microbiota balance and increased short-chain fatty acids.These results indicate that UMB alleviates MASLD by modulating hepatic metabolic function and gut microbiota homeostasis,highlighting its dual therapeutic role targeting the gut-liver axis.
基金sponsored by the National Science and Technology Innovation 2030 Major Program(2024ZD0530604)the National Key Research and Development Program of China(2023YFA1800804)+2 种基金the National Natural Science Foundation of China(82270601,China)the German Research Foundation(DFG Ta434/8-1 and SFB1382,Project-ID 403224013)the U.S.National Institutes of Health(R01DK137061 and R01DK133930 to D.D.).
文摘Metabolic dysfunction-associated steatotic liver disease(MASLD),previously known as nonalcoholic fatty liver disease(NAFLD),is the most prevalent chronic liver disease worldwide,with an estimated global prevalence of approximately 30%;however,effective pharmacotherapies are still limited due to its complex pathogenesis and etiology.Therefore,a more thorough understanding of disease pathogenesis is urgently needed.An increasing number of studies suggest that MASLD and its progressive form,metabolic dysfunction-associated steatohepatitis(MASH),are driven by chronic overnutrition,multiple genetic susceptibility factors,and pathogenic consequences,including hepatocyte damage and liver inflammation.Hepatic inflammation is the key event fueling the conversion from simple steatosis to steatohepatitis and fibrosis.Current therapies for MASH,including the recently approved thyroid hormone receptor-beta agonist resmetirom or the available incretin mimetics,mainly target metabolic injury to the liver but not inflammation directly.In this review,we provide an in-depth discussion of current data related to the immunological mechanisms of MASLD and summarize the effects of current and experimental therapies on immunoregulation in MASLD.
基金supported by the National Natural Science Foundation of China(No.82170609)NSFC-RGC Forum for Young Scholars(No.82411560273)+1 种基金Nanjing Drum Tower Hospital Academic Innovation Peak Project(No.2024-DF-03)the Natural Science Foundation of Jiangsu Province(No.BK20231118).
文摘Aims:The synergistic impact of alcohol consumption and cardiometabolic risk factors(CMRFs)on liver health remains unclear.Herein,we aimed to investigate the interplay between varying levels of alcohol consumption and the number of CMRFs on all-cause mortality in individuals with metabolic dysfunction-associated steatotic liver disease(MASLD)and metabolic and alcohol-associated liver disease(MetALD).Methods:Adult participants with ultrasound-proven hepatic steatosis were identified using the Third National Health and Nutrition Examination Survey(NHANES III)database.Multivariate Cox regression was applied to investigate the association between incremental alcohol consumption and the number of CMRFs,with all-cause mortality as the outcome.The E-value was calculated to assess the robustness of the associations,and additive interaction models were used to explore the synergistic effects of alcohol consumption and CMRFs on mortality.Results:A total of 2161 individuals(1957 with MASLD and 204 with MetALD)between the Years 1988 and 1994 were included in the analysis.During a follow-up period of 51,719 person-years,the overall mortality rate was 1.46%per person-year.Stratification by age showed an increased mortality risk associated with CMRFs and alcohol consumption in individuals aged<65 years,especially among those with 3-5 CMRFs(hazard ratio:3.15-5.71,all p<0.05).Additive interaction models also supported a synergistic effect in this subgroup,while no such trend was observed in those aged≥65 years.Conclusion:Among individuals with MASLD/MetALD and MASLD alone,a significant synergistic effect between alcohol consumption and CMRFs on mortality risk was found in those aged<65 years.This suggests an age-stratified approach for managing modifiable risk factors in individuals with MASLD or MetALD.
基金supported by the National Natural Science Foundation of China(Grant Nos.U21A20420,82373895 and 82304517)the Zhejiang Provincial Natural Science Foundation(Grant No.LQ23H310009,China).
文摘Metabolic dysfunction-associated steatotic liver disease(MASLD),the most prevalent chronic liver condition globally,lacks adequate and effective therapeutic remedies in clinical practice.Recent studies have increasingly highlighted the close connection between the ubiquitin–proteasome system(UPS)and the progression of MASLD.This relationship is crucial for understanding the disease's underlying mechanism.As a sophisticated process,the UPS govern protein stability and function,maintaining protein homeostasis,thus influencing a multitude of elements and biological events of eukaryotic cells.It comprises four enzyme families,namely,ubiquitin-activating enzymes(E1),ubiquitin-conjugating enzymes(E2),ubiquitin-protein ligases(E3),and deubiquitinating enzymes(DUBs).This review aims to delve into the array of pathways and therapeutic targets implicated in the ubiquitination within the pathogenesis of MASLD.Therefore,this review unveils the role of ubiquitination in MASLD while spotlighting potential therapeutic targets within the context of this disease.
基金supported by a Digital Clinician Scientist fellowship from the Berlin Institute of Health.Work in the lab of FT has been funded by the German Research Foundation(DFG Ta434/8-1 and CRC1382,Project-ID 403224013).
文摘The new European clinical practice guidelines from three scientific societies(European Association for the Study of the Liver,European Association for the Study of Diabetes and European Association for the Study of Obesity)on the management of metabolic dysfunction-associated steatotic liver disease(MASLD)provide detailed recommendations on diagnosis,risk stratification,monitoring strategies,treatment and prevention.Lifestyle interventions(eg,weight reduction,Mediterranean diet,exercise,alcohol abstinence)and the treatment of cardiometabolic risk factors continue to be the mainstay of treatment and prevention of the disease.Incretin mimetics that are approved to treat obesity and/or type 2 diabetes such as semaglutide and tirzepatide have benefits for ameliorating metabolic dysfunction-associated steatohepatitis(MASH).Novel developments include adapted strategies for screening(case finding)using non-invasive tests(NITs)with a focus on detecting fibrosis or cirrhosis,risk-adjusted monitoring of MASLD by NITs as well as the recommendation to use,if locally approved,the thyroid hormone receptorβ-agonist resmetirom in patients with non-cirrhotic MASH fibrosis(≥F2 stage).
文摘Metabolic dysfunction-associated steatotic liver disease(MASLD)is a global health burden that requires early screening,diagnosis,and intervention MASLD is a leading cause of chronic liver disease globally,with an estimated prevalence of 38%worldwide(1,2).MASLD is the new term that replaces what was previously known as non-alcoholic fatty liver disease(NAFLD).
基金funded by national funds through FCT-Portuguese Foundation for Science and Technology,under the scope of the Cardiovascular R&D Center-UnIC(UIDB/00051/2020 and UIDP/00051/2020)JC-L was supported by a travel grant fellowship from the Research Foundation Flanders(V465523N)SV-S is a principal investigator in the BMFTR Cluster4Future CurATime(CurATime project microbAIome,03ZU1202CB)funded by the Federal Ministry of Research,Technology and Space(BMFTR).
文摘Background Metabolic dysfunction-associated steatotic liver disease(MASLD)is the leading cause of chronic liver disease globally,with rising prevalence linked to metabolic syndrome(MetS).Excessive liver fat accumulation(steatosis)worsens disease progression and MASLD prognosis.Moreover,gut microbiota dysbiosis might promote steatosis,accelerating the disease progression to severe stages.Identifying gut microbiota signatures specific to steatosis severity might improve its diagnosis and inform personalised interventions in MASLD.This study aimed to characterise associations between gut microbiota composition and hepatic steatosis severity in a cohort of patients with MASLD/MetS.Ultimately,we aimed to assess the potential for microbiota features to enhance the diagnosis of severe steatosis.Methods A cross-sectional cohort of 61 patients with MetS with extensive clinical history was recruited at different stages of MASLD.Transient elastography was used to evaluate liver fibrosis and steatosis severity.Participants’faecal microbiota were profiled using 16S rRNA gene sequencing.Statistical analyses first identified correlations between microbiota profiles and patients’phenotypes,while disentangling important confounders such as medication.Identified features were then used to build predictive models for diagnosing severe steatosis.Results High steatosis severity was distinctly associated with a higher prevalence of the inflammation-associated Bacteroides 2(Bact2)-enterotype,accompanied by a lower proportion of beneficial commensals(eg,Akkermansia)and a higher proportion of opportunistic bacteria(eg,Streptococcus).Patients harbouring a Bact2-enterotype reached severe steatosis at lower Fatty Liver Index(FLI)thresholds.Using Bact2-carrier status together with FLI in a predictive model significantly improved the classification of severe steatosis(accuracy 90%,receiver operating characteristics 96%)when compared with FLI alone.Conclusion Gut microbiota composition and dysbiosis(defined as Bact2-enterotype)are distinctly associated with steatosis severity in MASLD/MetS.Patient stratification by microbiota composition enhances the diagnostic classification of severe steatosis in MASLD,suggesting a potential for personalised interventions in patients with microbiota dysbiosis.
基金supported by Japan Agency for Medical Research and Development(JP25fk0210123 to M.K.)Japanese Ministry of Health,Labour and Welfare(23HC2001 to M.K.)+1 种基金from Japan Agency for Medical Research and Development(JP25fk0310535,JP25fk0210174,and JP25fk0210123 to N.T.)Japanese Ministry of Health,Labour and Welfare(23HC2003 and 23HC2002 to N.T.).
文摘The prevalence of cirrhosis and hepatocellular carcinoma resulting from metabolic dysfunction-associated steatotic liver disease(MASLD)is increasing,posing a significant burden on both the economy and public health(1,2).Although the need for effective therapeutic strategies for MASLD is growing,pharmacologic options remain limited,with resmetirom currently the only approved drug.Consequently,lifestyle modification-particularly weight reduction through diet and exercise-remains the cornerstone of MASLD management.
文摘Introduction:Advances in HIV management have transformed HIV into a chronic condition,resulting in improved prognosis and increased survival among people living with HIV(PLWH).Traditional risk factors for metabolic dysfunction-associated steatotic liver disease(MASLD)—including dyslipidemia—are prevalent in PLWH.This systematic review and meta-analysis aim to synthesize current evidence on lipid profile disturbances as contributors to MASLD in PLWH.Methods:This systematic review and meta-analysis were conducted according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses(PRISMA)guidelines and registered in PROSPERO with registration number CRD420251054477.We searched seven databases to identify studies reporting the prevalence and characteristics of MASLD in PLWH.Meta-analysis was conducted using Review Manager 5.4.1.Mean differences(MDs)were calculated using a random-effects model.Risk of bias was assessed using the ROBINS-E tool.Results:A total of 17 studies comprising 3933 HIV-positive participants were included,among whom 1226(37%)had MASLD.Male sex was significantly associated with MASLD(OR=1.57;95%CI:1.13-2.17;p=0.007).MASLD was significantly associated with higher body mass index(BMI)(MD=3.23 kg/m^(2);p<0.00001).Lipid profile analysis revealed that MASLD patients had higher total cholesterol(MD=6.62 mg/dL;p=0.01),low density lipoprotein(LDL)(MD=3.83 mg/dL;p=0.01),triglycerides(MD=63.02 mg/dL;p<0.00001),and lower high density lipoprotein(HDL)(MD=-3.73 mg/dL;p<0.0001).Conclusion:This study demonstrates a significant difference in lipid profiles(higher total cholesterol,LDL,triglycerides,and lower HDL)among PLWH who develop MASLD,suggesting a potential metabolic signature associated with this comorbidity.
基金supported by the National Key Research and Development Program(2024YFA1307101).
文摘Metabolic dysfunction-associated steatotic liver disease(MASLD)is now considered to be among the most prevalent chronic liver diseases worldwide.Its comprehensive management encompasses multiple stages,including risk assessment,early detection,stratified intervention,and long-term follow-up.Among these,improving diagnostic accuracy and optimizing individualized therapeutic strategies remain key challenges in both research and clinical practice.In recent years,artificial intelligence and smart devices have developed rapidly and have gradually been applied in the medical field,offering novel tools and pathways for MASLD risk stratification,non-invasive diagnosis,therapeutic evaluation,and patient self-management.This review summarizes the current applications of artificial intelligence and smart devices in MASLD care,highlights their benefits and limitations,and discusses future directions to support precision diagnosis and treatment strategies.
文摘The liver is increasingly recognized as a major regulator of systemic cardio-renal-metabolic health.Evidence is mounting that sex-chromosome dosage per se itself,independent of gonadal sex hormones,modulates hepatic physiology and liver disease risk.Turner syndrome(TS;monosomy X)and Klinefelter syndrome(KS;47,XXY and variants)are the two most common sex-chromosome aneuploidies and carry a clinically relevant,yet often under-appreciated,burden of liver disease.Population studies show that individuals with TS have 2-to sixfold higher odds of raised liver enzymes,steatotic liver disease,advanced fibrosis,and even hepatocellular malignancy compared with to sex-and age-matched controls.In KS,the prevalence of metabolic dysfunction-associated steatotic liver disease(MASLD)reaches approximately 45%,with testosterone deficiency,visceral adiposity,and systemic inflammation acting as key drivers.Pathogenetic mechanisms converge on vascular dysgenesis and estrogen deficiency in TS,and on hypogonadism-related metabolic derangements in KS,together accelerating steatosis,inflammation,and fibrogenesis.This concise review/Comprehensive perspective reviews discusses historical background,epidemiology,hepatic phenotypes,pathophysiology,and current diagnostic and management recommendations.It also highlights critical knowledge gaps,including the need for prospective cohorts,optimized hormone-replacement protocols,and trials of emerging pharmacological approaches anti-MASH agents.Raising awareness among all stakeholders,endocrinologists,hepatologists,and primary-care physicians is essential for early detection,multidisciplinary management,and improved hepatic and extra-hepatic outcomes in these vulnerable patient populations.
基金funded by grants from the National Natural Science Foundation of China(82070588)High-Level Creative Talents from the Department of Public Health in Zhejiang Province(S2032102600032)+2 种基金the Project of New Century 551 Talent Nurturing in WenzhouGT is supported in part by grants from the School of Medicine,University of Verona,Verona,Italy.CDB is supported in part by the Southampton NIHR Biomedical Research Centre(NIHR203319),UKCDB has received research grant support from Echosens,the manufacturer of the Fibroscan device used to assess liver fat and fibrosis in chronic liver diseases.
文摘Background and AimsHepatic iron deposition(HID)in the reticuloendothelial system(RES)is associated with histological severity in metabolic dysfunction-associated steatotic liver disease(MASLD).This study aimed to assess the interaction between the transferrin(TF)-rs1049296 C>T variant and HID patterns on the risk of significant liver fibrosis in MASLD.MethodsWe analyzed 406 adults with liver biopsy-confirmed MASLD.HID was categorized as hepatocellular,RES,or mixed,based on Perl's iron staining.The association between iron-related genetic variants and significant liver fibrosis(fibrosis stage≥F2)was analyzed,focusing on the interactions between single-nucleotide polymorphism genotypes and iron deposition patterns.Multivariable logistic regression analysis was used to adjust for potential confounders.ResultsHID was detected in 271(66.7%)patients,with hepatocellular,RES,and mixed patterns accounting for 11.1%,18.0%,and 37.7%,respectively.A significant interaction was observed between HID and the TF-rs1049296 genotype(P=0.035 for interaction).In multivariable analysis,male sex,hypertension,severe lobular inflammation,and mixed hepatocellular/RES iron deposition were independent predictors of significant liver fibrosis.RES deposition markedly increased the risk of significant liver fibrosis(adjusted odds ratio:6.65;95%confidence interval:1.84-23.97,p<0.05),particularly in men with isolated RES iron deposition(adjusted odds ratio:5.26;95%confidence interval:1.21-22.81,p<0.05).ConclusionsThe TF-rs1049296 T allele interacts with RES iron deposition to identify a MASLD subpopulation at elevated risk of progressive liver disease,providing opportunities for refined risk stratification and personalized management.
基金funded by the Program of China Scholarships Council(No.202206785007)“Four New”Experimental Teaching Curriculum Reform Project of Jinan University in China(SYJG202235),the Teaching QualityTeaching Reform Project of Undergraduate University of Guangdong in China(2020).
文摘MASLD in China:an under-recognized public health problem Epidemic characteristics of metabolic dysfunction-associated steatotic liver disease(MASLD)in China As one of the most common chronic non-infectious liver diseases,metabolic dysfunction-associated steatotic liver disease(MASLD),previously known as non-alcoholic fatty liver disease(NAFLD),affects one quarter of the world’s population,is closely related to diabetes and obesity[1,2].
基金supported by research grants from the National Natural Science Foundation of China(82471593 to Junxia Min,and 32330047 and 31930057 to Fudi Wang)。
文摘Metabolic dysfunction-associated steatotic liver disease(MASLD)remains a rapidly growing global health burden.Here,we report that the nonessential amino acid(NEAA)transporter SLC7A11 plays a key role in MASLD.In patients with MASLD,we found high expression levels of SLC7A11 that were correlated directly with clinical grade.Using both loss-of-function and gain-of-function genetic models,we found that Slc7a11 deficiency accelerated MASLD progression via classic cystine/cysteine deficiencyinduced ferroptosis,while serine deficiency and a resulting impairment in de novo cysteine production were attributed to ferroptosis-induced MASLD progression in mice overexpressing hepatic Slc7a11.Consistent with these findings,we found that both serine supplementation and blocking ferroptosis significantly alleviated MASLD,and the serum serine/glutamate ratio was significantly lower in these preclinical disease models,suggesting that it might serve as a prognostic biomarker for MASLD in patients.These findings indicate that defects in NEAA metabolism are involved in the progression of MASLD and that serine deficiency-triggered ferroptosis may provide a therapeutic target for its treatment.
