Inflammation, as a critical defensive response of the body, can exacerbate tissue damage through oxidative cascade reactions when it becomes uncontrolled. Among the key oxidative stress mediators are monoamine oxidase A (MAO-A) and peroxynitrite (ONOO[-]), which synergistically promote cellular damage. To further elucidate their molecular mechanisms of action, precise and reliable imaging tools are required for spatiotemporal dynamic monitoring of both mediators. Addressing the limitations of traditional dual-probe detection, which suffers from inconsistencies in distribution and response, this study developed a mitochondria-targeted dual-responsive fluorescent probe, KMO, achieving the first in situ real-time visualization of MAO-A and ONOO[-] in inflammatory cells and an acute hepatitis mouse model. Utilizing this tool, we revealed a self-amplifying cycle in inflammation characterized by "MAO-A activation─ONOO[-] burst─ferroptosis─inflammation exacerbation", and demonstrated that inhibiting ferroptosis can disrupt this pathway. This work not only provides a fluorescent imaging tool but also establishes a theoretical and experimental foundation for elucidating the mechanisms of acute inflammation and targeted interventions.

Diseases caused by Flaviviridae viruses exert profound global health and economic burdens due to their high incidence and associated mortality. Infection by the Flaviviridae family often leads to severe acute or chronic illnesses, including hemorrhagic systemic diseases caused by dengue virus (DENV) and yellow fever virus, neurological complications associated with West Nile virus and Zika virus (ZIKV) infection, as well as liver damage and hepatocellular carcinoma resulting from hepatitis C virus (HCV) infection. Accumulating evidence indicates that a hallmark of Flaviviridae infection is to hijack calcium (Ca2+) signaling of the host cells, consequently facilitating viral entry, RNA replication, viral assembly, and release. Transient receptor potential (TRP) channels, a superfamily of nonselective cation channels, are central regulators of intracellular Ca2+ homeostasis. Recent studies reveal that TRP channels are closely involved in Flaviviridae infection. This comprehensive review synthesizes current findings on the role of TRP channels (e.g. TRPC, TRPV, TRPA, TRPM, and TRPML) in the pathogenesis of Flaviviridae viruses such as DENV, ZIKV, HCV, and Japanese encephalitis virus. Moreover, this review summarizes virus-TRP channel interaction mechanisms and discusses the potential of targeting TRP channels for host-directed antiviral therapies. This review aims to establish a conceptual framework for understanding TRP channel biology in Flaviviridae infection and to guide future research on antiviral strategies. Future directions should highlight the potential utility of TRP channel research for advancing anti-Flaviviridae therapies and clarifying their underlying mechanisms.

Adult T-cell leukemia/lymphoma (ATLL) is an aggressive lymphoma with a poor prognosis. The human T-lymphotropic virus 1 (HTLV-1) is associated with immunodeficiency and increased extranodal involvement in patients with diffuse large B-cell lymphoma (DLBCL). We report on a 47-year-old woman with spastic paraparesis and hepatitis B who was diagnosed with the acute form of ATLL. The clinical picture reveals peripheral generalized lymphadenopathy and splenomegaly. Findings on a hematologic exam indicated leukocytosis with lymphocytosis. A bone marrow biopsy/aspiration confirmed 50% T-cell lymphoid infiltration. Biochemistry results revealed hypercalcemia and a high lactate dehydrogenase value. Results of a CT scan indicated abdominal and thoracic adenopathy as well as moderate splenomegaly. A supraclavicular lymph node biopsy established a DLBCL diagnosis. The final diagnosis was composite lymphoma, DLBCL, and ATLL. The CHOP (cyclophosphamide, doxorubicin hydrochloride, vincristine sulfate [Oncovin], and prednisone) regimen was chosen due to the patient's ECOG performance status. Multiple infectious complications were diagnosed during chemotherapy-induced secondary aplasia. A complete remission, confirmed via PET-CT imaging, was obtained. After 1 month, a skin tumor on the upper right thigh was discovered and biopsied, and the histopathological exam and immunochemistry findings indicated Epstein-Barr virus-DLBCL lymphoma. The association of 2 aggressive lymphomas in a single HTLV-1 carrier is a rare report, and the evolution was severe, complicated by opportunistic infections, and unfavorable.

Disseminated intravascular coagulation (DIC) is a critical complication of systemic illness, and its diagnosis can be especially challenging in patients with cirrhosis, where baseline liver-related coagulopathy may mask the development of superimposed consumptive coagulopathy. In the setting of sepsis and liver dysfunction, DIC may progress to purpura fulminans (PF), a rare, life-threatening condition characterized by dermal necrosis and microvascular thrombosis. We present the case of a 54-year-old man with alcoholic cirrhosis and untreated hepatitis C who developed DIC and PF following methicillin-sensitive Staphylococcus aureus (MSSA) bacteremia and toxic shock syndrome (TSS). Despite treatment with antibiotics, transfusions, intravenous immunoglobulin (IVIG), and hemodialysis, he developed multiorgan failure. This case highlights that in patients with sepsis and cirrhosis, acutely worsening coagulation parameters, falling fibrinogen, and evolving purpuric or necrotic skin lesions should not be attributed to liver disease alone but should instead prompt urgent evaluation for DIC and PF. The early recognition of this distinction is essential to guide timely multidisciplinary intervention in this rare but devastating complication.

Hepatitis E virus (HEV) is a major cause of acute viral hepatitis worldwide, with zoonotic genotypes detected in humans and animals. In Africa, limited data exist on environmental HEV circulation. Here, we report the first detection of Rocahepevirus ratti (RHEV) in urban wastewater from Conakry, Guinea. From December 2024 to April 2025, Rocahepevirus ratti (RHEV) has been detected in 35 out of 180 urban untreated wastewater samples in Conakry, Guinea. The phylogenetic analysis of partial HEV ORF1 genome segments reveals clustering with African rodent RHEV strains, highlighting environmental contamination and potential zoonotic risk for human populations in proximity. This finding underscores the need for integrated One Health surveillance to monitor HEV transmission at the human-animal-environment interface in West Africa, particularly in Guinea.

Background: Hepatitis E virus (HEV) is an increasingly recognized cause of acute viral hepatitis in Thailand as the burden of hepatitis A, B, and C has declined. HEV is a positive-sense RNA virus in the family Hepeviridae with three major open reading frames encoding replication proteins (ORF1), the capsid protein (ORF2), and an accessory protein involved in viral egress (ORF3). Unlike highly endemic regions where genotypes 1 and 2 are linked to waterborne outbreaks, infections in Thailand are reported mainly as sporadic cases associated with zoonotic transmission, most commonly genotype 3. Objectives: This review summarizes the epidemiology, transmission routes, and public health implications of HEV infection in Thailand. Methods: Peer-reviewed studies on HEV seroprevalence, molecular epidemiology, and transmission in Thailand were identified through PubMed using combinations of the keywords "HEV" and "Thailand". Two investigators independently screened titles, abstracts, and full texts. Eligible studies were synthesized qualitatively. Results: Earlier studies suggested low population exposure, but more recent evidence indicates substantial cumulative risk. A nationwide survey among blood donors reported anti-HEV IgG seroprevalence of about 30%, with geographic variation and increasing prevalence with age. Detection of HEV RNA in pigs, slaughterhouse environments, and retail pork products, together with links to raw or undercooked pork consumption, supports pigs as the principal reservoir and foodborne exposure as an important route. Transfusion-associated infection has also been documented. Conclusions: In Thailand, HEV infection is linked mainly to zoonotic and foodborne transmission involving genotype 3. Stronger surveillance, food safety measures, and risk-based blood safety policies are needed.

Alcohol-associated Hepatitis (AH) is a rare acute injury caused by alcohol consumption, which can lead to one of the most severe manifestations of liver disease. It is part of the alcohol-related liver diseases (ArLD) spectrum, which represents a major global health burden, with oxidative stress and inflammation serving as central, interconnected pathogenic mechanisms. Chronic alcohol (ethanol) consumption induces hepatic reactive oxygen species (ROS) generation through multiple pathways, including cytochrome P450 2E1 (CYP2E1) induction, mitochondrial dysfunction, and NADPH oxidase activation. These oxidative insults trigger a cascade of cellular damage encompassing lipid peroxidation, protein adduct formation, DNA damage, and endoplasmic reticulum stress, ultimately leading to hepatocyte dysfunction and multiple forms of cell death, including apoptosis, necroptosis, pyroptosis, and ferroptosis. The inflammatory response, orchestrated primarily by Kupffer cells and infiltrating neutrophils through Toll-like receptor (TLR) signalling and inflammasome activation, not only amplifies hepatic injury but also promotes fibrogenesis through hepatic stellate cell activation. Neutrophils, characterised by elevated lipocalin-2 expression and spontaneous NETosis in AH, exhibit a paradoxical role by driving both tissue damage and repair. Current therapeutic strategies include corticosteroids, which remain the first-line treatment for severe AH, while emerging therapies targeting the gut-liver axis, hepatic regeneration, and specific molecular targets show promise in clinical trials. This review comprehensively examines the molecular crosstalk between oxidative stress and inflammation in the pathogenesis of AH to highlight current and investigational therapeutic approaches targeting these interconnected pathways.

Alcoholic liver disease (ALD), secondary to chronic alcohol abuse, encompasses a spectrum of liver disorders that progress from steatosis and hepatitis to fibrosis, cirrhosis, and acute-on-chronic liver failure. It poses a considerable global health burden due to its elevated rates of associated morbidity and mortality. The rising prevalence of ALD, coupled with the lack of approved pharmacotherapies, presents considerable unmet clinical needs. In this study, long-chain acyl-CoA synthetase 4 (ACSL4) was identified as a pathogenic driver in the context of chronic alcohol consumption. Hepatocyte Acsl4 ablation mitigated key pathological manifestations in Gao-Binge model mice, as evidenced by reduced inflammatory cell infiltration and attenuated lipid accumulation. Mechanistically, ACSL4 inhibition augmented cellular antioxidant defence through elevating gamma-glutamylcysteine (γ-GC) levels. In addition, γ-GC bound to and suppressed the expression of protein tyrosine phosphatase type IVA member 1 (PTP4A1). Both genetic silencing and pharmacological inhibition of PTP4A1 attenuated the activation of the downstream MAPK-NF-κB inflammatory cascade. Dronedarone, identified as a novel compound targeting ACSL4, demonstrated efficacy in ameliorating the progression of ALD. Overall, these findings elucidate a novel mechanism wherein ACSL4 modulates antioxidant responses via a small bioactive peptide, highlighting ACSL4 as a potential therapeutic target for ALD.

A major challenge in many liver diseases is the lack of highly sensitive, specific, and minimally invasive biomarkers. Cell-free DNA (cfDNA) methylation compensates for the limitations of existing biomarkers and exhibits substantial clinical application potential in a variety of liver diseases, notably hepatocellular carcinoma (HCC). A systematic literature search was conducted in the PubMed, Web of Science Core Collection, and Cochrane Library databases from 1 January 2000, to 31 December 2025.

Seronegative autoimmune hepatitis (SnAIH) lacks detectable conventional autoantibodies (ANA, SMA, anti-LKM, anti-LC1, and anti-SLA/LP), posing diagnostic challenges. Increasing evidence suggests SnAIH in adults reflects limitations in autoantibody detection rather than a distinct variant. We systematically re-evaluated all biopsy-proven SnAIH cases in a large international multicenter AIH cohort using standardized testing. Among 760 patients with baseline liver biopsy, 52 (6.8%) were initially classified as SnAIH. Forty-three lacked complete autoantibody testing, most commonly anti-SLA/LP. After comprehensive re-evaluation, only 9 patients (1.18%) fulfilled criteria for true SnAIH. All presented acutely with markedly elevated transaminases (median ALT 16.1 × ULN); five had elevated IgG levels. Histology suggestive of autoimmune-like drug-induced liver injury was observed in four cases. All but one relapsed after treatment withdrawal, and 42.9% failed to normalize ALT at six months. In conclusion, SnAIH is rare (~1%), highlighting the importance of standardized, comprehensive autoantibody testing and re-testing according to the guidelines.