Role of AMPK DOI
Sihai Dave Zhao,

Weilun Fang,

Wei Yu

и другие.

PubMed, Год журнала: 2024, Номер 49(12), С. 1891 - 1901

Опубликована: Дек. 28, 2024

Over 25% of the global population is affected by metabolic dysfunction-associated fatty liver disease (MAFLD), yet its pathogenesis remains unclear. Endoplasmic reticulum stress (ERS) may be involved in onset and progression MAFLD. Adenosine 5'-monophosphate-activated protein kinase α2 (AMPKα2), a key regulator hepatic energy metabolism, influence MAFLD development via ERS modulation. This study aims to investigate role AMPKα2 high-fat diet-induced mouse model regulatory effect on inositol-requiring enzyme 1 alpha (IRE1α)-c-Jun N-terminal (JNK) signaling pathway. Liver-specific knockout mice C57BL/6 background were generated subjected induction. Mice divided into four groups: wild-type control (WT+Chow, basic diet for 12 weeks), (WT+HFD, (AMPKα2 KO+Chow), KO+HFD). Blood glucose, lipid levels, function assessed post-treatment. Liver histology was analyzed using Oil Red O, hematoxylin-eosin, Masson, Sirius staining. Western blotting used evaluate expression AMPKα2, markers, autophagy, apoptosis, ferroptosis-related proteins. Compared with WT+Chow group, WT+HFD group showed significantly elevated blood alanine aminotransferase (ALT), aspartate (AST) levels (all P<0.01); histological analyses revealed steatosis, vacuolization, fibrosis, increased non-alcoholic steatohepatitis activity score (NAS) (P<0.001). Phosphorylated IRE1α autophagy marker microtubule-associated light chain (LC) 3II/LC3I markedly upregulated, while apoptotic proteins (Cleaved-Caspase 3, BAX, Bcl-2) ferroptosis markers (SLC7A11, GPX4) no significant change (P>0.05). In KO+HFD ALT, AST reduced compared group. Histological improvements observed vacuolization accumulation. Expression p-IRE1α, JNK, LC3II/LC3I decreased (P<0.05). Hepatic alleviates induced MAFLD, potentially inhibiting IRE1α-JNK pathway reducing autophagy.

Язык: Английский

Endpoints in NASH Clinical Trials: Are We Blind in One Eye? DOI Creative Commons
Amedeo Lonardo, Stefano Ballestri, Alessandro Mantovani

и другие.

Metabolites, Год журнала: 2024, Номер 14(1), С. 40 - 40

Опубликована: Янв. 8, 2024

This narrative review aims to illustrate the notion that nonalcoholic steatohepatitis (NASH), recently renamed metabolic dysfunction-associated (MASH), is a systemic disorder featuring both adverse hepatic and extrahepatic outcomes. In recent years, several NASH trials have failed identify effective pharmacological treatments and, therefore, lifestyle changes are cornerstone of therapy for NASH. with this context, we analyze epidemiological burden possible pathogenetic factors involved. These include genetic factors, insulin resistance, lipotoxicity, immuno-thrombosis, oxidative stress, reprogramming metabolism, hypoxia, all which eventually culminate in low-grade chronic inflammation increased risk fibrosis progression. The explanations underlying failure also accurately examined. We conclude high heterogeneity NASH, resulting from variable backgrounds, exposure, responses different stresses, susceptibility hepatocyte differences repair-response, calls personalized medicine approaches involving research on noninvasive biomarkers. Future should aim at achieving complete assessment determinants, modifiers, correlates thus adopting more holistic unbiased approach, notably including cardiovascular–kidney–metabolic outcomes, without restricting therapeutic perspectives histological surrogates liver-related outcomes alone.

Язык: Английский

Процитировано

13

Pharmacological therapy of metabolic dysfunction-associated steatotic liver disease-driven hepatocellular carcinoma DOI Creative Commons
Yumin Wang, Joshua S. Fleishman,

Tongda Li

и другие.

Frontiers in Pharmacology, Год журнала: 2024, Номер 14

Опубликована: Янв. 19, 2024

In light of a global rise in the number patients with type 2 diabetes mellitus (T2DM) and obesity, non-alcoholic fatty liver disease (NAFLD), now known as metabolic dysfunction-associated (MAFLD) or steatotic (MASLD), has become leading cause hepatocellular carcinoma (HCC), annual occurrence MASLD-driven HCC expected to increase by 45%–130% 2030. Although MASLD serious major public health threat globally, exact molecular mechanisms mediating remain an open problem, necessitating future investigation. Meanwhile, emerging studies are focusing on utility bioactive compounds halt progression HCC. this review, we first briefly review recent progress possible pathogenesis for We then discuss application mitigate through different modulatory encompassing anti-inflammatory, lipid metabolic, gut microbial pathways, providing valuable information treatment prevention Nonetheless, clinical research exploring effectiveness herbal medicines is still warranted.

Язык: Английский

Процитировано

11

From gut to liver: Exploring the crosstalk between gut-liver axis and oxidative stress in metabolic dysfunction-associated steatotic liver disease DOI Creative Commons

Mi Zhou,

Jianyu Lv, Han Y. H. Chen

и другие.

Annals of Hepatology, Год журнала: 2025, Номер unknown, С. 101777 - 101777

Опубликована: Янв. 1, 2025

Non-alcoholic fatty liver disease (NAFLD), now recognized as metabolic dysfunction-associated steatotic (MASLD), represents a significant and escalating global health challenge. Its prevalence is intricately linked to obesity, insulin resistance, other components of the syndrome. As our comprehension MASLD deepens, it has become evident that this condition extends beyond liver, embodying complex, multi-systemic with hepatic manifestations mirror broader landscape. This comprehensive review delves into critical interplay between gut-liver axis oxidative stress, elucidating their pivotal roles in etiology progression MASLD. Our analysis reveals several key findings: (1) Bile acid dysregulation can trigger stress through enhanced ROS production hepatocytes Kupffer cells, leading mitochondrial dysfunction lipid peroxidation; (2) Gut microbiota dysbiosis disrupts intestinal barrier function, allowing increased translocation endotoxins like LPS, which activate inflammatory pathways TLR4 signaling promote via NADPH oxidase activation; (3) The redox-sensitive transcription factors NF-κB Nrf2 serve crucial mediators axis, regulating responses orchestrating antioxidant defenses; (4) Oxidative stress-induced damage function creates destructive feedback loop, further exacerbating inflammation progression. These findings highlight complex interrelationship pathogenesis, suggesting potential therapeutic targets for management.

Язык: Английский

Процитировано

1

ER Stress as a Sentinel Mechanism for ER Ca2+ Homeostasis DOI Creative Commons

Tadashi Makio,

Junsheng Chen, Thomas Simmen

и другие.

Cell Calcium, Год журнала: 2024, Номер 124, С. 102961 - 102961

Опубликована: Окт. 18, 2024

Язык: Английский

Процитировано

8

The lipid side of unfolded protein response DOI Creative Commons
Wojciech Białek, Anita Hryniewicz‐Jankowska,

Paulina Czechowicz

и другие.

Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids, Год журнала: 2024, Номер 1869(7), С. 159515 - 159515

Опубликована: Июнь 5, 2024

Although our current knowledge of the molecular crosstalk between ER stress, unfolded protein response (UPR), and lipid homeostasis remains limited, there is increasing evidence that dysregulation either or profoundly affects other. Most research regarding UPR signaling in human diseases has focused on causes consequences disrupted folding. The itself consists very complex pathways function to not only maintain homeostasis, but just as importantly, modulate biogenesis allow adjust promote cell survival. Lipid known activate many aspects UPR, complexity this a major barrier. disequilibrium lipotoxicity are be important contributors numerous pathologies, including insulin resistance, liver disease, cardiovascular diseases, neurodegenerative cancer. Despite their medical significance continuous research, however, mechanisms synthesis during stress conditions, impact fate decisions, remain poorly understood. Here we summarize view connections altered metabolism, UPR.

Язык: Английский

Процитировано

7

Developmental Programming of the Fetal Immune System by Maternal Western-style Diet: Mechanisms and Implications for Disease Pathways in the Offspring DOI Open Access

Benjamin N. Nelson,

Jacob E. Friedman

Опубликована: Апрель 22, 2024

Maternal obesity and over/undernutrition can have a long-lasting impact on offspring health during critical periods in the first 1000 days of life. Children born to mothers with reduced immune responses stimuli which increase susceptibility infections. Recently, maternal western-style diets (WSD), high fat simple sugars, been associated skewing neonatal cell development, recent evidence suggests that dysregulation innate immunity early life has long-term consequences metabolic diseases behavioral disorders later Several factors contribute abnormal tolerance or trained immunity, including changes gut microbiota, metabolites, epigenetic modifications. Critical knowledge gaps remain regarding mechanisms whereby these fetal postnatal especially precursor stem cells bone marrow liver. Components microbiota are transferred from consuming WSD their understudied identifying cause effect adaptive development needs be refined. Tools single-cell RNA-sequencing, analysis, spatial location specific liver for understanding system programming. Considering vital role function plays health, it will important understand how control developmental programming immunity.

Язык: Английский

Процитировано

6

A review of the mechanisms of abnormal ceramide metabolism in type 2 diabetes mellitus, Alzheimer’s disease, and their co-morbidities DOI Creative Commons

Yun Pan,

Jieying Li,

P.T. Lin

и другие.

Frontiers in Pharmacology, Год журнала: 2024, Номер 15

Опубликована: Фев. 6, 2024

The global prevalence of type 2 diabetes mellitus (T2DM) and Alzheimer’s disease (AD) is rapidly increasing, revealing a strong association between these two diseases. Currently, there are no curative medication available for the comorbidity T2DM AD. Ceramides structural components cell membrane lipids act as signal molecules regulating homeostasis. Their synthesis degradation play crucial roles in maintaining metabolic balance vivo , serving important mediators development neurodegenerative disorders. Abnormal ceramide metabolism disrupts intracellular signaling, induces oxidative stress, activates inflammatory factors, impacts glucose lipid homeostasis metabolism-related tissues like liver, skeletal muscle, adipose tissue, driving occurrence progression T2DM. connection changes levels brain, amyloid β accumulation, tau hyper-phosphorylation evident. Additionally, regulates survival apoptosis through related signaling pathways, actively participating Regulatory enzymes, their metabolites, pathways impact core pathological molecular mechanisms shared by AD, such insulin resistance response. Consequently, may become potential therapeutic target intervention paper comprehensively summarizes discusses role its metabolites pathogenesis well latest progress treatment with

Язык: Английский

Процитировано

5

Elucidating cuproptosis in metabolic dysfunction-associated steatotic liver disease DOI Open Access

Yamei Li,

Ping Qi, Siyuan Song

и другие.

Biomedicine & Pharmacotherapy, Год журнала: 2024, Номер 174, С. 116585 - 116585

Опубликована: Апрель 13, 2024

Emerging research into metabolic dysfunction-associated steatotic liver disease (MASLD) up until January 2024 has highlighted the critical role of cuproptosis, a unique cell death mechanism triggered by copper overload, in disease's development. This connection offers new insights MASLD's complex pathogenesis, pointing to accumulation as key factor that disrupts lipid metabolism and insulin sensitivity. The identification cuproptosis significant contributor MASLD underscores potential for targeting copper-mediated pathways novel therapeutic approaches. promising avenue suggests managing levels could mitigate progression, offering fresh perspective on treatment strategies. Further investigations how influences are essential unraveling detailed mechanisms at play identifying effective interventions. focus copper's health opens possibility developing targeted therapies address underlying causes MASLD, moving beyond symptomatic tackle root problem. exploration context exemplifies importance understanding metal homeostasis diseases represents step forward quest more treatments. direction lights path innovative management reversal.

Язык: Английский

Процитировано

5

The fundamental role of mitochondria–endoplasmic reticulum contacts in ageing and declining healthspan DOI Creative Commons
Richard M. Monaghan

Open Biology, Год журнала: 2025, Номер 15(2)

Опубликована: Фев. 1, 2025

This open question research article highlights mitochondria-associated endoplasmic reticulum (ER) membranes (MAMs), which have emerged as crucial cellular structures that challenge our traditional understanding of organelle function. review the critical importance MAMs a frontier in cell biology with far-reaching implications for health, disease and ageing. serve dynamic communication hubs between ER mitochondria, orchestrating essential processes such calcium signalling, lipid metabolism stress responses. Recent has implicated MAM dysfunction wide array conditions, including neurodegenerative diseases, metabolic disorders, cardiovascular diseases cancer. The significant lack biological knowledge behind function emphasizes need to study these enigmatic subcellular sites greater detail. Key questions include mechanisms controlling formation disassembly, full complement MAM-associated proteins how contribute decision-making ageing processes. Advancing through interdisciplinary approaches cutting-edge technologies promises reveal new insights into fundamental signalling pathways potentially lead innovative therapeutic strategies range diseases. As such, represents potential transform life human health.

Язык: Английский

Процитировано

0

Μetabolic dysfunction-associated steatotic liver disease: a condition of heterogeneous metabolic risk factors, mechanisms and comorbidities requiring holistic treatment DOI
Christopher D. Byrne, Angelo Armandi, Vanessa Pellegrinelli

и другие.

Nature Reviews Gastroenterology & Hepatology, Год журнала: 2025, Номер unknown

Опубликована: Фев. 17, 2025

Язык: Английский

Процитировано

0