SGLT2 inhibitor promotes ketogenesis to improve MASH by suppressing CD8+ T cell activation

Ketogenesis instigates immune suppression in enzalutamide resistant prostate cancer via OTUD7B β-hydroxybutyrylation

Next-generation androgen receptor inhibitors are the primary treatment for metastatic prostate cancer. Unfortunately, the majority of patients rapidly develop resistance. Resistance to enzalutamide has been linked to the emergence of an immunosuppressive tumor, although the underlying mechanisms remain poorly understood. In this study, we observed a marked overexpression of enzymes involved in the ketogenic pathway in enzalutamide-induced castration-resistant prostate cancer, which contributed to immune desertification and resistance to immunotherapy. Mechanistically, upregulation of the ketogenic pathway led to the accumulation of β-hydroxybutyrate, which promoted β-hydroxybutyrylation of the cell cycle-regulated deubiquitinase OTUD7B at lysine 511. This modification impaired the degradation of APC/C substrates, resulting in a subsequent reduction in cytoplasmic double-stranded DNA accumulation, thereby attenuating cGAS-STING activation and interferon expression. These findings shed light on the metabolic adaptations and immune escape driven by androgen receptor signaling inhibitors, potentially informing the development of more effective and durable therapeutic approaches in the near future.

Repurposing glucose-lowering drugs for cancer therapy

The acknowledged relationship between metabolism and cancer retains important potential as a novel target in therapy. Reallocating glucose-lowering drugs (GLDs) in cancer treatment offers valuable perspectives for the ability of these molecules to regulate metabolism at cellular and systemic level. This comprehensive review addresses the therapeutic potential of the main antidiabetic classes of glucose-lowering drugs with emerging anticancer effects, such as metformin, rosiglitazone, glucagon-like peptide-1 receptor agonists (GLP-1RAs), and sodium/glucose cotransporter-2 inhibitors. The multifaceted actions of these drugs are explored, from in vitro evidence to clinical evidence as monotherapy or as a sparing agent with chemotherapy and immunotherapy. For each molecule, unconventional mechanisms, benefits, and limitations are dissected and possible concerns addressed, supporting evidence for the potential use of the drug in cancer.

Effective preparation and immunogenicity analysis of antigenic proteins for prevention of porcine enteropathogenic coronaviruses PEDV/TGEV/PDCoV

Porcine epidemic diarrhea virus (PEDV), transmissible gastroenteritis virus (TGEV) and porcine deltacoronavirus (PDCoV) cause highly contagious gastrointestinal damage to piglets with high coinfection in clinical. However, there is no available trivalent vaccine against the three viruses. Here, a trivalent subunit vaccine by combining PEDV-SCOE, TGEV-SAD, and PDCoV-RBD proteins with ISA 201 adjuvant was effectively prepared, and the immunogenicity was evaluated. The detection results showed that the vaccine induced specific humoral IgG, neutralizing antibodies, and increased levels of Th1 and Th2 cytokines. Splenocytes proliferation and specific cytotoxic T lymphocytes (CTL) were activated. Furthermore, the three antigenic proteins up-regulated CD4+ and CD8+ T lymphocytes, activated the germinal center (GC) through the Tfh-GC axis, and promoted the differentiation of GC B cells in to plasma cells and memory B cells. Overall, the three antigenic proteins will provide helpful information for further exploration of trivalent vaccines against PEDV, TGEV, and PDCoV.

Pathophysiological underpinnings of metabolic dysfunction-associated steatotic liver disease

Metabolic dysfunction-associated steatotic liver disease (MASLD) is emerging as the leading cause of chronic liver disease worldwide, reflecting the global epidemics of obesity, metabolic syndrome, and type 2 diabetes. Beyond its strong association with excess adiposity, MASLD encompasses a heterogeneous population that includes individuals with normal body weight ("lean MASLD") highlighting the complexity of its pathogenesis. This disease results from a complex interplay between genetic susceptibility, epigenetic modifications, and environmental factors, which converge to disrupt metabolic homeostasis. Adipose tissue dysfunction and insulin resistance trigger an overflow of lipids to the liver, leading to mitochondrial dysfunction, oxidative stress, and hepatocellular injury. These processes promote hepatic inflammation and fibrogenesis, driven by cross talk among hepatocytes, immune cells, and hepatic stellate cells, with key contributions from gut-liver axis perturbations. Recent advances have unraveled pivotal molecular pathways, such as transforming growth factor-β signaling, Notch-induced osteopontin, and sphingosine kinase 1-mediated responses, that orchestrate fibrogenic activation. Understanding these interconnected mechanisms is crucial for developing targeted therapies. This review integrates current knowledge on the pathophysiology of MASLD, emphasizing emerging concepts such as lean metabolic dysfunction-associated steatohepatitis (MASH), epigenetic alterations, hepatic extracellular vesicles, and the relevance of extrahepatic signals. It also discusses novel therapeutic strategies under investigation, aiming to provide a comprehensive and structured overview of the evolving MASLD landscape for both basic scientists and clinicians.

Metal-modulated T cell antitumor immunity and emerging metalloimmunotherapy

In recent years, increasing evidence has shown that metals play important roles in both innate and adaptive immunity. An emerging concept of metalloimmunotherapy has been proposed, which may accelerate the development of immunotherapy for cancers. Here, we discuss how metals affect T cell function through different signaling pathways. Metals impact the fate of T cells, including their activation, proliferation, cytotoxicity, and differentiation. Most importantly, metals also participate in mitochondrial operation by regulating energy production and reactive oxygen species homeostasis in T cells. We also identified the metal-based mutual effects between tumor cells and T cells in the tumor microenvironment. Overall, the antitumor effect of T cells can be improved by targeting metal metabolism and metalloimmunotherapy, which will be a step forward in the treatment of cancers.

Impact of Metabolic Dysfunction-associated Steatotic Liver Disease on Cardiovascular Structure, Function, and the Risk of Heart Failure

Mounting evidence has established metabolic dysfunction-associated steatotic liver disease (MASLD) as an independent risk factor for heart failure (HF), particularly HF with preserved ejection fraction (HFpEF). In this narrative review we explore the impact of MASLD on cardiovascular structure and function. We summarize findings from multiple cohort studies demonstrating that MASLD is associated with distinct patterns of adverse cardiac remodeling, including increased left ventricular concentricity and impaired diastolic function. These subclinical changes in cardiac structure and function often precede overt HF development and appear to occur in the context of multiple interconnected pathways involving metabolic dysfunction, systemic inflammation, adipose tissue dysregulation, vascular dysfunction, and altered hepatic hemodynamics. Early identification of cardiac structural and functional abnormalities through systematic screening may enable timely intervention in this high-risk population. Lifestyle modifications remain foundational, but achieving and maintaining significant weight loss is challenging. Recent clinical trials have shown promising results with cardiometabolic agents, particularly glucagon-like protein 1 receptor agonists, which demonstrate significant weight loss and hepatic and cardiovascular benefits. Despite these advances, key knowledge gaps remain regarding optimal screening strategies, mechanisms linking MASLD to HF, and targeted therapeutic approaches. Addressing these gaps will be essential for developing effective prevention and treatment strategies in this high-risk population.

Metabolic Syndrome and Liver Disease: Re-Appraisal of Screening, Diagnosis, and Treatment Through the Paradigm Shift from NAFLD to MASLD

Metabolic dysfunction-associated steatotic liver disease (MASLD), previously known as non-alcoholic fatty liver disease (NAFLD), encompasses a spectrum of liver diseases characterized by hepatic steatosis, the presence of at least one cardiometabolic risk factor, and no other apparent cause. Metabolic syndrome (MetS) is a cluster of clinical conditions associated with increased risk of cardiovascular disease, type 2 diabetes, and overall morbidity and mortality. This narrative review summarizes the changes in the management of people with MetS and NAFLD/MASLD from screening to therapeutic strategies that have occurred in the last decades. Specifically, we underline the clinical importance of considering the different impacts of simple steatosis and advanced fibrosis and provide an up-to-date overview on non-invasive diagnostic tests (i.e., imaging and serum biomarkers), which now offer acceptable accuracy and are globally more accessible. Early detection of MetS and MASLD is a top priority as it allows for timely interventions, primarily through lifestyle modification. The liver and cardiovascular benefits of a global and multidimensional approach are not negligible. Therefore, a holistic approach to both conditions, MetS and related chronic liver disease, should be applied to improve overall health and longevity.

Post-hoc analysis of the tofogliflozin post-marketing surveillance study (J-STEP/LT): Tofogliflozin improves liver function in type 2 diabetes patients regardless of BMI

AIMS/INTRODUCTION

Patients with type 2 diabetes are at high risk of developing steatotic liver disease (SLD). Weight loss has proven effective in treating metabolic dysfunction-associated steatotic liver disease (MASLD) in obese patients with type 2 diabetes, with sodium-glucose cotransporter 2 (SGLT2) inhibitors showing promising results. However, lean MASLD is more prevalent in Japan, necessitating alternative approaches to body weight reduction.

MATERIALS AND METHODS

We used the J-STEP/LT dataset including up to 3-year treatment data to analyze the effects of the SGLT2 inhibitor tofogliflozin on liver function and treatment safety and conducted a subgroup analysis based on body mass index (BMI; kg/m2, <20, 20-<23, 23-<25, 25-<30, and ≥30).

RESULTS

This study included 4,208 participants. Tofogliflozin significantly reduced alanine aminotransferase (ALT) levels in participants with baseline ALT levels >30 U/L across all BMI groups, with median changes of -12, -16, -13, -15, and -15 U/L, respectively (P = 0.9291 for trends). However, median changes in body weight with tofogliflozin were -2.00, -2.75, -2.00, -3.00, and -3.80 kg, respectively (P < 0.0001 for trends), with no significant weight loss observed in the BMI <20 group. ALT levels were also significantly decreased in participants who did not lose weight. Safety assessments according to BMI and age categories revealed no clear differences in the frequency of adverse events.

CONCLUSIONS

Tofogliflozin reduced ALT levels without substantial body weight reduction among lean participants. These findings suggest that SGLT2 inhibitors may be a viable treatment option for non-obese patients with type 2 diabetes and SLD.

Novel translational mouse models of metabolic dysfunction-associated steatotic liver disease comparable to human MASLD with severe obesity

OBJECTIVE

Metabolic dysfunction-associated steatotic liver disease (MASLD) is the most common cause of chronic liver disease, especially in patients with severe obesity. However, current mouse models for MASLD do not reflect the polygenetic background nor the metabolic changes in this population. Therefore, we investigated two novel mouse models of MASLD with a polygenetic background for the metabolic syndrome.

METHODS

TALLYHO/JngJ mice and NONcNZO10/LtJ mice were fed a high-fat- high-carbohydrate (HF-HC) diet with a surplus of cholesterol diet. A second group of TH mice was additional treated with empagliflozin.

RESULTS

After sixteen weeks of feeding, both strains developed metabolic syndrome with severe obesity and histological manifestation of steatohepatitis, which was associated with significantly increased intrahepatic CD8+cells, CD4+cells and Tregs, contributing to a significant increase in pro-inflammatory and pro-fibrotic gene activation as well as ER stress and oxidative stress. In comparison with the human transcriptomic signature, we could demonstrate a good metabolic similarity, especially for the TH mouse model. Furthermore, TH mice also developed signs of kidney injury as an extrahepatic comorbidity of MASLD. Additional treatment with empagliflozin in TH mice attenuates hepatic steatosis and improves histological manifestation of MASH.

CONCLUSIONS

Overall, we have developed two promising new mouse models that are suitable for preclinical studies of MASLD as they recapitulate most of the key features of MASLD.

The Management of Cardiometabolic Risk in MAFLD: Therapeutic Strategies to Modulate Deranged Metabolism and Cholesterol Levels

Background and Objectives: Fatty Liver Disease is a major health problem worldwide. We can distinguish liver steatosis as non-associated or associated with chronic/acute alcohol consumption. These two entities share similar stages ranging from hepatic fat storage (namely, steatosis) to inflammation, necrosis, and fibrosis until hepatocellular carcinoma (HCC). Over time, "Metabolic Associated Fatty Liver Disease" (MAFLD) has replaced nonalcoholic fatty liver disease (NAFLD) nomenclature and has included cardiometabolic criteria in these patients definition. Thus, obesity, type 2 diabetes mellitus (T2DM), hypertension, and dyslipidemia are MAFLD features and are of the metabolic syndrome. Importantly, there is not a specific treatment for MAFLD, but there are therapeutic strategies that act on metabolic dysfunction related to MAFLD. They can reduce the progression of liver fibrosis and its complications. Materials and Methods: For all these reasons, we conducted a narrative review of the literature, and we focused on metabolic dysfunction related to MAFLD, with a special regard for cholesterol metabolism. Results: MAFLD is a recently redefined condition that better describes the metabolism derangement responsible for fatty liver disease. This distinguishes MAFLD from NAFLD. In fact, the diagnostic criteria for MAFLD require the presence of liver steatosis together with at least one of the following: obesity, T2DM, or evidence of metabolic disorder such as hypertriglyceridemia, low high-density lipoprotein cholesterol, or hypertension. As a result, MAFLD is closely linked to an increased cardiometabolic risk. Current therapeutic approaches can be used to reduce this risk, focusing on lifestyle interventions and pharmacological strategies. Several treatments in patients diagnosed with MAFLD are mainly cholesterol-lowering remedies. Among these, Pro-protein Convertase Subtilisin/Kexin type 9 inhibitors (PCSK9i) show the most promising efficacy profile but data on liver fibrosis are lacking. Agonists of GLP-1 receptor, Sodium-glucose cotransporter-2 inhibitors (SGLT2i) and Dipeptidyl Peptidase-4 inhibitors (DPP-4i) have a " multi-hit " action allowing their use also in diabetic patients with MAFLD. Conclusions: Lifestyle modifications, some nutraceuticals, statins, incretins, and PCSK9i have changed the natural course and significantly improved the cardiometabolic outcomes of MAFLD. Emerging cholesterol-lowering drugs, such as Bempedoic acid, can overcome low compliance to statins' use and their controversial effect on liver fibrosis. Finally, medications targeting insulin resistance allow for strategic interventions of the convoluted pathophysiology of MAFLD in multiple steps, with the potential to reduce liver steatosis, inflammation, and necrosis and, sometimes even to reverse liver fibrosis.

Mechanism and therapeutic targets of circulating immune cells in diabetic retinopathy

Diabetic retinopathy (DR) continues to be the leading cause of preventable vision loss among working-aged adults, marked by immune dysregulation within the retinal microenvironment. Typically, the retina is considered as an immune-privileged organ, where circulating immune cells are restricted from entry under normal conditions. However, during the progression of DR, this immune privilege is compromised as circulating immune cells breach the barrier and infiltrate the retina. Increasing evidence suggests that vascular and neuronal degeneration in DR is largely driven by the infiltration of immune cells, particularly neutrophils, monocyte-derived macrophages, and lymphocytes. This review delves into the mechanisms and therapeutic targets associated with these immune cell populations in DR, offering a promising and innovative approach to managing the disease.