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16 pages, 862 KB  
Review
Drug-Induced Acute Generalized Exanthematous Pustulosis: Mechanisms, Diagnosis, and Clinical Differentiation from Other Pustular Eruptions
by Esteban Zavaleta-Monestel, Audry Escudero-Correa, Jeaustin Mora-Jiménez, Andy Jesús Hernández-Vásquez, Luis Carlos Monge-Bogantes, Josephine Hernández-López and Sebastián Arguedas-Chacón
Dermato 2026, 6(1), 3; https://doi.org/10.3390/dermato6010003 (registering DOI) - 15 Jan 2026
Abstract
Background/Objectives: Acute generalized exanthematous pustulosis (AGEP) is a severe drug-induced cutaneous reaction characterized by the abrupt onset of sterile pustules, fever, neutrophilia, and a T cell-mediated type IVd hypersensitivity response. This narrative review synthesizes current evidence on pharmacological triggers, immunopathogenic mechanisms, diagnostic criteria, [...] Read more.
Background/Objectives: Acute generalized exanthematous pustulosis (AGEP) is a severe drug-induced cutaneous reaction characterized by the abrupt onset of sterile pustules, fever, neutrophilia, and a T cell-mediated type IVd hypersensitivity response. This narrative review synthesizes current evidence on pharmacological triggers, immunopathogenic mechanisms, diagnostic criteria, and differential diagnosis to provide a clinically oriented framework. Methods: A comprehensive literature search was conducted in PubMed/MEDLINE, Scopus, ScienceDirect, and SpringerLink for studies published between 2000 and 2025, complemented by selected clinical reference sources. Studies addressing clinical features, immunological pathways, pharmacovigilance signals, and diagnostic tools for AGEP were included. Synthesis of Evidence: β-lactam antibiotics remain the most frequent triggers, while increasing associations have been reported with hydroxychloroquine, targeted therapies, immune checkpoint inhibitors, psychotropic agents, and vaccines. Immunopathogenesis is driven by IL-36 activation, CXCL8/IL-8–mediated neutrophil recruitment, and IL36RN mutations, explaining overlap with pustular psoriasis. Diagnostic accuracy improves through integration of drug latency, clinical morphology, histopathology, biomarkers, and standardized tools such as the EuroSCAR score. Conclusions: AGEP is a complex pustular reaction induced by diverse drugs and amplified by IL-36-mediated inflammation. Accurate diagnosis requires a multidimensional approach supported by structured algorithms and robust pharmacovigilance to identify evolving drug-associated patterns. Full article
(This article belongs to the Special Issue Reviews in Dermatology: Current Advances and Future Directions)
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11 pages, 821 KB  
Article
Tildrakizumab in Managing Psoriasis with Involvement of Difficult-to-Treat Areas: A Multicenter Real-Life Retrospective Study
by Ruggero Cascio Ingurgio, Angela Alfano, Elena Matteodo, Luciano Ibba, Luigi Gargiulo, Giovanni Paolino, Santo Raffaele Mercuri, Andrea Carugno, Nicola Zerbinati, Stefano Bighetti, Antonio Costanzo, Alessandra Narcisi and Mario Valenti
J. Clin. Med. 2026, 15(2), 631; https://doi.org/10.3390/jcm15020631 - 13 Jan 2026
Abstract
Background: Psoriasis involving difficult-to-treat anatomical areas, such as the scalp, genitalia, fingernails, and palmoplantar regions, carries a disproportionate disease burden and often requires systemic therapy. In this context, real-life data comparing the long-term effectiveness of tildrakizumab 100 mg versus 200 mg in [...] Read more.
Background: Psoriasis involving difficult-to-treat anatomical areas, such as the scalp, genitalia, fingernails, and palmoplantar regions, carries a disproportionate disease burden and often requires systemic therapy. In this context, real-life data comparing the long-term effectiveness of tildrakizumab 100 mg versus 200 mg in patients with difficult-to-treat psoriasis remain limited. Methods: This multicenter retrospective observational study included adult patients in three Italian dermatology centers. Global efficacy endpoints included PASI75, PASI90, PASI100, and absolute PASI ≤ 2 at weeks 16, 32, 52, and 104. Site-specific effectiveness was assessed as complete clearance (PGA = 0) in patients with baseline involvement (PGA ≥ 2) of difficult-to-treat areas. Outcomes were described by dose. Results: 183 patients were included (100 mg: n = 89; 200 mg: n = 94). Patients receiving 200 mg had higher baseline BMI and were more frequently biologic-experienced. At week 104, PASI75 was achieved by 94.2% of patients receiving 100 mg and 94.7% receiving 200 mg, while PASI90 and PASI100 were achieved by 82.7% vs. 57.9% and 48.1% vs. 47.4%, respectively. Clearance of difficult-to-treat areas improved progressively across all sites. Scalp and genital psoriasis showed higher and earlier clearance rates, whereas nail and palmoplantar psoriasis showed slower and more heterogeneous responses. No consistent dose-dependent advantage emerged, despite less favorable baseline characteristics in the 200 mg group. Conclusions: Over 104 weeks, tildrakizumab showed sustained long-term effectiveness in both global disease control and difficult-to-treat areas. The 200 mg dose, used in a more difficult-to-treat population, achieved comparable long-term outcomes, supporting dose optimization in clinical practice. Full article
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23 pages, 1257 KB  
Review
Connective Tissue Disease-Associated Pulmonary Arterial Hypertension: Current Therapeutic Strategies and Future Prospects
by Yukina Mizuno Yokoyama, Ryu Watanabe, Tomohiro Yamaguchi, Ryuhei Ishihara, Mayu Shiomi, Yuya Fujita, Masao Katsushima, Kazuo Fukumoto, Yoichiro Haji, Shinsuke Yamada and Motomu Hashimoto
Biomolecules 2026, 16(1), 140; https://doi.org/10.3390/biom16010140 - 13 Jan 2026
Abstract
Connective tissue disease-associated pulmonary arterial hypertension (CTD-PAH) is a severe form of pulmonary hypertension with poor prognosis. It most commonly arises in systemic sclerosis (SSc), followed by systemic lupus erythematosus (SLE) and mixed connective tissue disease (MCTD). Its pathogenesis involves a complex interplay [...] Read more.
Connective tissue disease-associated pulmonary arterial hypertension (CTD-PAH) is a severe form of pulmonary hypertension with poor prognosis. It most commonly arises in systemic sclerosis (SSc), followed by systemic lupus erythematosus (SLE) and mixed connective tissue disease (MCTD). Its pathogenesis involves a complex interplay of immune dysregulation, chronic inflammation, endothelial injury, vascular remodeling, and fibrosis. Although vasodilators targeting the endothelin, nitric oxide, and prostacyclin pathways remain the therapeutic backbone, newer agents—including the activin signal inhibitor sotatercept and inhaled treprostinil—have expanded treatment options. Immune-targeted therapies such as glucocorticoids, cyclophosphamide, mycophenolate mofetil, rituximab, and IL-6 receptor inhibitors may benefit inflammation-dominant PAH phenotypes, while fibrotic phenotypes continue to demonstrate limited responsiveness. In addition to brain natriuretic peptide (BNP), N-terminal (NT)-proBNP and disease-specific autoantibodies, emerging biomarkers show promise for early detection, risk stratification, and personalized treatment, though validation in CTD-PAH is lacking. Advances in animal models replicating immune-mediated vascular injury and fibrosis have further improved mechanistic understanding. Despite these developments, substantial unmet needs remain, including the absence of disease-specific therapeutic strategies, limited biomarker integration into clinical practice, and a scarcity of large, well-designed trials targeting individual CTD subtypes. Addressing these gaps will be essential for improving prognosis in patients with CTD-PAH. Full article
(This article belongs to the Section Molecular Biology)
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24 pages, 1612 KB  
Review
Biomarkers in Primary Systemic Vasculitides: Narrative Review
by Mario Sestan, Martina Held and Marija Jelusic
Int. J. Mol. Sci. 2026, 27(2), 730; https://doi.org/10.3390/ijms27020730 - 11 Jan 2026
Viewed by 84
Abstract
Vasculitides are a heterogeneous group of disorders characterized by inflammation of blood vessel walls, leading to tissue ischemia and organ injury. Traditional inflammatory markers such as the erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) are widely used but lack diagnostic specificity. This [...] Read more.
Vasculitides are a heterogeneous group of disorders characterized by inflammation of blood vessel walls, leading to tissue ischemia and organ injury. Traditional inflammatory markers such as the erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) are widely used but lack diagnostic specificity. This has driven the search for more informative biomarkers across vasculitis subtypes. This review summarizes current evidence for validated and emerging biomarkers in large-, medium-, small-, and variable-vessel vasculitis, as well as single-organ vasculitis. Key analytes reflect systemic inflammation, such as serum amyloid A (SAA) and interleukin-6 (IL-6), as well as endothelial activation, complement pathways, neutrophil and macrophage activation, and organ-specific damage. Promising candidates include pentraxin-3 (PTX3) and matrix metalloproteinase-9 (MMP-9) in large-vessel vasculitis; N-terminal pro-B-type natriuretic peptide (NT-proBNP) and S100 proteins in Kawasaki disease; galactose-deficient immunoglobulin A1 (Gd-IgA1) and urinary angiotensinogen (AGT) in IgA vasculitis; and tissue inhibitor of metalloproteinases-1 (TIMP-1), S100 proteins, complement C3, and PTX3 in antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis. Although these biomarkers provide mechanistic insight, most lack disease-specificity, external validation, or standardized assays. Future progress will require multicenter studies, harmonized testing, and integrated biomarker panels combined with imaging modalities to improve diagnosis, activity assessment, and monitoring. Full article
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16 pages, 1025 KB  
Review
Treatment of Inflammatory Bowel Disease with Drugs Targeting PANoptosis: A Comprehensive Review
by John K. Triantafillidis and Stavros Karakatsanis
Biomedicines 2026, 14(1), 148; https://doi.org/10.3390/biomedicines14010148 - 11 Jan 2026
Viewed by 135
Abstract
Background: Inflammatory Bowel Disease (IBD) involves a complex interplay between immune dysregulation and intestinal barrier failure. Traditional views focused on individual cell death pathways, but the emerging concept of PANoptosis—a coordinated inflammatory cell death involving apoptosis, necroptosis, and pyroptosis—offers a more holistic understanding [...] Read more.
Background: Inflammatory Bowel Disease (IBD) involves a complex interplay between immune dysregulation and intestinal barrier failure. Traditional views focused on individual cell death pathways, but the emerging concept of PANoptosis—a coordinated inflammatory cell death involving apoptosis, necroptosis, and pyroptosis—offers a more holistic understanding of IBD pathogenesis. Objective: This review evaluates the role of PANoptosis in IBD, identifies key molecular triggers (such as the ZBP1-ADAR1 axis), and discusses the therapeutic potential of targeting this process. Methods: We analyzed recent literature and clinical trial data regarding programmed cell death (PCD) inhibitors and natural compounds in IBD models. Results: Preclinical data suggest that targeting PANoptotic regulators like RIPK1 and ZBP1 can restore barrier integrity. However, clinical translation remains challenging; for instance, while targeting pyroptosis via IL-1/IL-18 (Anakinra) showed promise in theory, clinical results in IBD have been disappointing. Furthermore, RIPK1 inhibitors such as GSK2982772 have failed to meet primary endpoints in Phase 2 trials. Conclusions: PANoptosis is a “hot” therapeutic target, but successful treatment likely requires combination therapies or “PANoptosome” specific modulators rather than single-pathway inhibition. Full article
(This article belongs to the Section Molecular and Translational Medicine)
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31 pages, 3161 KB  
Review
Oral Dysbiosis and Neuroinflammation: Implications for Alzheimer’s, Parkinson’s and Mood Disorders
by Laura Carolina Zavala-Medina, Joan Sebastian Salas-Leiva, Carlos Esteban Villegas-Mercado, Juan Antonio Arreguín-Cano, Uriel Soto-Barreras, Sandra Aidé Santana-Delgado, Ana Delia Larrinua-Pacheco, María Fernanda García-Vega and Mercedes Bermúdez
Microorganisms 2026, 14(1), 143; https://doi.org/10.3390/microorganisms14010143 - 8 Jan 2026
Viewed by 334
Abstract
Background: Growing evidence indicates that oral microbiome dysbiosis contributes to systemic inflammation, immune activation, and neural dysfunction. These processes may influence the onset and progression of major neuropsychiatric and neurodegenerative disorders. This review integrates clinical, epidemiological, and mechanistic findings linking periodontal pathogens and [...] Read more.
Background: Growing evidence indicates that oral microbiome dysbiosis contributes to systemic inflammation, immune activation, and neural dysfunction. These processes may influence the onset and progression of major neuropsychiatric and neurodegenerative disorders. This review integrates clinical, epidemiological, and mechanistic findings linking periodontal pathogens and oral microbial imbalance to Alzheimer’s disease (AD), Parkinson’s disease (PD), depression, and anxiety. Methods: A narrative review was conducted using PubMed/MEDLINE, Scopus, Web of Science, and Google Scholar to identify recent studies examining alterations in the oral microbiota, microbial translocation, systemic inflammatory responses, blood–brain barrier disruption, cytokine signaling, and neural pathways implicated in brain disorders. Results: Evidence from human and experimental models demonstrates that oral pathogens, particularly Porphyromonas gingivalis, Fusobacterium nucleatum, and Treponema denticola, can disseminate systemically, alter immune tone, and affect neural tissues. Their virulence factors promote microglial activation, cytokine release (IL-1β, IL-6, TNF-α), amyloid-β aggregation, and α-synuclein misfolding. Epidemiological studies show associations between oral dysbiosis and cognitive impairment, motor symptoms in PD, and alterations in mood-related taxa linked to stress hormone profiles. Immunometabolic pathways, HPA-axis activation, and the oral–gut–brain axis further integrate these findings into a shared neuroinflammatory framework. Conclusions: Oral dysbiosis emerges as a modifiable contributor to neuroinflammation and brain health. Periodontal therapy, probiotics, prebiotics, synbiotics, and targeted inhibitors of bacterial virulence factors represent promising strategies to reduce systemic and neural inflammation. Longitudinal human studies and standardized microbiome methodologies are still needed to clarify causality and evaluate whether restoring oral microbial balance can modify the course of neuropsychiatric and neurodegenerative disorders. Full article
(This article belongs to the Section Microbiomes)
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24 pages, 3255 KB  
Review
Molecular Mechanisms Underlying Atherosclerosis and Current Advances in Targeted Therapeutics
by Bo Zhu
Int. J. Mol. Sci. 2026, 27(2), 634; https://doi.org/10.3390/ijms27020634 - 8 Jan 2026
Viewed by 209
Abstract
Atherosclerosis is a chronic, multifactorial vascular disease and the leading global cause of cardiovascular morbidity. Its development reflects interconnected disturbances in lipid metabolism, endothelial function, inflammation, smooth muscle cell (SMC) phenotypic switching, and extracellular matrix remodeling. Genetic predisposition, including monogenic disorders such as [...] Read more.
Atherosclerosis is a chronic, multifactorial vascular disease and the leading global cause of cardiovascular morbidity. Its development reflects interconnected disturbances in lipid metabolism, endothelial function, inflammation, smooth muscle cell (SMC) phenotypic switching, and extracellular matrix remodeling. Genetic predisposition, including monogenic disorders such as familial hypercholesterolemia and polygenic risk variants, modulates disease susceptibility by altering lipid homeostasis as well as inflammatory and thrombotic pathways. Epigenetic regulators and noncoding RNAs, such as histone modifications, microRNAs, and long noncoding RNAs, further shape gene expression and link environmental cues to vascular pathology. Endothelial injury promotes lipoprotein retention and oxidation, triggering monocyte recruitment and macrophage-driven foam cell formation, cytokine secretion, and necrotic core development. Persistent inflammation, macrophage heterogeneity, and SMC plasticity collectively drive plaque growth and destabilization. Emerging insights into immune cell metabolism, intracellular signaling networks, and novel regulatory RNAs are expanding therapeutic possibilities beyond lipid-lowering. Current and evolving treatments include statins, proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibitors, anti-inflammatory agents targeting interleukin-1 beta (IL-1β) or NOD-, LRR-, and pyrin domain-containing protein 3 (NLRP3), and advanced approaches such as gene editing, siRNA, and nanoparticle-based delivery. Integrating multi-omics, biomarker-guided therapy, and precision medicine promises improved risk stratification and next-generation targeted interventions. This review summarizes recent molecular advances and highlights translational opportunities for enhancing atherosclerosis prevention and treatment. Full article
(This article belongs to the Special Issue Molecular Insights and Therapeutic Advances in Atherosclerosis)
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18 pages, 3656 KB  
Article
Free Fatty Acids and Endotoxins Synergically Induce Pyroptosis in Bovine Hepatocytes
by Dan Li, Yuan Tian, Lei Tian, Hang Yu, Le Zhang, Song Wang, Changsheng Lei, Pin Long, Tao Peng, Lei Liu and Yingfang Zhou
Metabolites 2026, 16(1), 53; https://doi.org/10.3390/metabo16010053 - 8 Jan 2026
Viewed by 130
Abstract
Background/Objectives: Elevated circulating non-esterified fatty acids (NEFAs) are closely associated with hepatic inflammatory injury in dairy cattle, simultaneously with the entry of lipopolysaccharide (LPS) into the liver. This study aimed to investigate the synergistic effects of NEFAs and LPS on pyroptosis in [...] Read more.
Background/Objectives: Elevated circulating non-esterified fatty acids (NEFAs) are closely associated with hepatic inflammatory injury in dairy cattle, simultaneously with the entry of lipopolysaccharide (LPS) into the liver. This study aimed to investigate the synergistic effects of NEFAs and LPS on pyroptosis in bovine hepatocytes. Methods: Primary bovine hepatocytes were allocated into control, NEFA, NEFA + LPS, NEFA + LPS + Caspase-1 inhibitor, and NEFA + LPS + NLRP3 inhibitor groups. Levels and activation of pyroptosis-related markers (NLRP3, ASC, Caspase-1, GSDMD, IL-18 and IL-1β) were measured. Results: NEFAs alone upregulated these markers in a dose-dependent manner. Compared to NEFAs alone, NEFA + LPS co-treatment significantly enhanced levels of the markers, increased IL-1β secretion, and promoted NLRP3/Caspase-1 co-localization and Caspase-1activity. Notably, these effects of NEFA + LPS were attenuated by the NLRP3 or Caspase-1 inhibitors. Similar results were obtained when repeating the experiments in carcinoma HepG2 cells. Also, a random liver section from the subclinical ketotic cows displayed a higher fluorescence intensity of NLRP3 and Caspase-1 and stronger co-localization than that from a healthy cow. Conclusions: NEFAs and LPS synergistically contribute to pyroptosis in bovine hepatocytes by enhancing NLRP3 inflammasome assembly and subsequent Caspase-1 activation, providing a potential target for mitigating hepatic injury. Full article
(This article belongs to the Special Issue Metabolic Research in Dairy Cattle Health)
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25 pages, 31724 KB  
Article
Oxidative Stress and PRKN-Mediated Senescence Link RhoA/ROCK Signaling to Epithelial Remodeling in Allergic Rhinitis
by Xuan Yuan, Wei Zhong, Shaobing Xie, Liyuan Liu, Wenjing Gu, Yixiang Zeng, Hua Zhang, Weihong Jiang, Zhihai Xie and Peisong Gao
Antioxidants 2026, 15(1), 77; https://doi.org/10.3390/antiox15010077 - 7 Jan 2026
Viewed by 262
Abstract
Allergic rhinitis (AR) is characterized by persistent epithelial remodeling, yet the upstream drivers and molecular mechanisms remain poorly defined. Analysis of nasal mucosa from AR patients revealed marked epithelial remodeling, oxidative stress, and Th2 inflammation. Transcriptome analysis of nasal mucosa revealed RhoA as [...] Read more.
Allergic rhinitis (AR) is characterized by persistent epithelial remodeling, yet the upstream drivers and molecular mechanisms remain poorly defined. Analysis of nasal mucosa from AR patients revealed marked epithelial remodeling, oxidative stress, and Th2 inflammation. Transcriptome analysis of nasal mucosa revealed RhoA as one of the most upregulated genes, with expression positively correlating with disease severity. Using epithelial-specific RhoA-deficient mice (RhoAcKO) and fasudil, a RhoA/ROCK inhibitor, we found that loss of RhoA/ROCK signaling markedly attenuated nasal Th2 inflammation, oxidative stress, and epithelial remodeling following allergen challenge. Further transcriptome analysis demonstrated that elevated RhoA activation was associated with increased epithelial cellular senescence. Both in vitro and in vivo studies confirmed that epithelial RhoA activation promotes allergen- or Th2 cytokine-induced cellular senescence, whereas genetic or pharmacologic elimination of senescent cells alleviated allergic inflammation and tissue remodeling. Pathway analysis identified PRKN (parkin) as a central node within RhoA-regulated, senescence-associated networks in AR. Functional studies showed that PRKN overexpression mitigated IL-13-induced mitochondrial dysfunction, oxidative stress, and epithelial senescence in human nasal epithelial cells. Together, these findings reveal that RhoA-driven epithelial senescence contributes to allergic inflammation and epithelial remodeling in AR and identify PRKN as a potential therapeutic target to restore epithelial homeostasis. Full article
(This article belongs to the Special Issue Oxidative Stress in Cell Senescence)
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12 pages, 236 KB  
Article
Long-Term Impact of Guselkumab on Systemic Inflammation Indices in Moderate-to-Severe Psoriasis
by Edoardo Mortato, Lorenzo Marcelli, Agostino Panichelli, Marina Talamonti, Valerio Gneo, Domenico Marrapodi, Cosimo Di Raimondo, Luca Bianchi and Marco Galluzzo
J. Clin. Med. 2026, 15(2), 439; https://doi.org/10.3390/jcm15020439 - 6 Jan 2026
Viewed by 221
Abstract
Background/Objectives: Psoriasis is a chronic immune-mediated inflammatory disease associated with systemic inflammation and comorbidities such as cardiovascular disease and metabolic syndrome. Blood-derived inflammatory indices like neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), systemic immune-inflammation index (SII), systemic inflammation response index (SIRI), and pan-immune-inflammation [...] Read more.
Background/Objectives: Psoriasis is a chronic immune-mediated inflammatory disease associated with systemic inflammation and comorbidities such as cardiovascular disease and metabolic syndrome. Blood-derived inflammatory indices like neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), systemic immune-inflammation index (SII), systemic inflammation response index (SIRI), and pan-immune-inflammation value (PIV) have been proposed as biomarkers of systemic inflammation and disease severity. This retrospective and prospective observational study aimed to evaluate the long-term effects of guselkumab, an IL-23 inhibitor, on these indices in moderate-to-severe psoriasis. Methods: We analyzed 208 patients with moderate-to-severe psoriasis treated with guselkumab, with hematologic evaluations available for 208 patients at baseline, 208 at week 52, 129 at week 104, and 94 at week 156. Systemic inflammatory indices were calculated from routine annual blood tests. Patients were stratified by obesity, cardiovascular comorbidities, treatment response, and prior biologic therapy. Longitudinal changes were assessed using Friedman tests with Wilcoxon post hoc comparisons, and correlations between PASI and inflammatory indices were evaluated using Spearman’s coefficients. Results: SIRI and PLR showed significant reductions at week 156 (p = 0.038 and p = 0.018, respectively), while MLR also decreased over time without reaching consistent significance. NLR and PIV showed minimal or inconsistent changes. Obese patients and those with cardiovascular disease had higher baseline SII and SIRI and less pronounced improvements. No significant differences were observed between super responders and others. Correlation between baseline PASI and most inflammatory markers was weak, except for a weak but significant correlation with PIV (ρ = 0.119, p = 0.049). Conclusions: Guselkumab treatment is associated with long-term reduction in systemic inflammatory indices, particularly SIRI. The weak correlation of these markers with skin severity highlights a dissociation between cutaneous and systemic inflammation. SIRI and SII may serve as useful biomarkers to monitor systemic inflammation and guide comprehensive management in psoriasis patients. Full article
18 pages, 2011 KB  
Article
Non-Canonical Senescence Phenotype in Resistance to CDK4/6 Inhibitors in ER-Positive Breast Cancer
by Aynura Mammadova, Yuan Gu, Ling Ruan, Sunil S. Badve and Yesim Gökmen-Polar
Biomolecules 2026, 16(1), 93; https://doi.org/10.3390/biom16010093 - 6 Jan 2026
Viewed by 137
Abstract
Cyclin-dependent kinase 4/6 inhibitors (CDK4/6i) have transformed the treatment landscape for estrogen receptor-positive (ER+) breast cancer, yet resistance remains a major clinical challenge. Although CDK4/6i induce G1 arrest and therapy-induced senescence (TIS), the exact nature of this senescent state and its contribution [...] Read more.
Cyclin-dependent kinase 4/6 inhibitors (CDK4/6i) have transformed the treatment landscape for estrogen receptor-positive (ER+) breast cancer, yet resistance remains a major clinical challenge. Although CDK4/6i induce G1 arrest and therapy-induced senescence (TIS), the exact nature of this senescent state and its contribution to resistance are not well understood. To explore this, we developed palbociclib- (2PR, 9PR, TPR) and abemaciclib- (2AR, 9AR, TAR) resistant ER+ breast cancer sublines through prolonged drug exposure over six months. Resistant cells demonstrated distinct phenotypic alterations, including cellular senescence, reduced mitochondrial membrane potential, and impaired glycolytic activity. Cytokine profiling and enzyme-linked immunosorbent assay (ELISA) validation revealed a non-canonical senescence-associated secretory phenotype (SASP) characterized by elevated growth/differentiation factor 15 (GDF-15) and serpin E1 (plasminogen activator inhibitor-1, PAI-1) and absence of classical pro-inflammatory interleukins, including IL-1α and IL-6. IL-8 levels were significantly elevated, but no association with epithelial–mesenchymal transition (EMT) was observed. Resistant cells preserved their epithelial morphology, showed no upregulation of EMT markers, and lacked aldehyde dehydrogenase 1-positive (ALDH1+) stem-like populations. Additionally, Regulated upon Activation, Normal T-cell Expressed, and Secreted (RANTES) was strongly upregulated in palbociclib-resistant cells. Together, these findings identify a distinct, non-canonical senescence phenotype associated with CDK4/6i resistance and may provide a foundation for identifying new vulnerabilities in resistant ER+ breast cancers through targeting SASP-related signaling. Full article
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20 pages, 4641 KB  
Article
Salmon Nasal Cartilage Proteoglycan Ameliorate Joint Pain and Cartilage Degradation by Regulating Catabolic and Anabolic Homeostasis in MIA-Induced Osteoarthritis
by Min Yu, So Eun Jo, Young Bae Son, Ye Jin Kim, Youngsik Seo, Sang Bae Han, Hyun Jin Kim, Seon Gil Do, Hanjoong Jo and Dong Ju Son
Nutrients 2026, 18(1), 176; https://doi.org/10.3390/nu18010176 - 5 Jan 2026
Viewed by 337
Abstract
Background/Objectives: Osteoarthritis (OA) is a pervasive chronic joint disease characterized by the triad of persistent articular cartilage degeneration, debilitating synovial inflammation, and sustained chronic pain. Although salmon nasal cartilage proteoglycan (SPG) is recognized for supporting joint health, the precise molecular mechanism underlying its [...] Read more.
Background/Objectives: Osteoarthritis (OA) is a pervasive chronic joint disease characterized by the triad of persistent articular cartilage degeneration, debilitating synovial inflammation, and sustained chronic pain. Although salmon nasal cartilage proteoglycan (SPG) is recognized for supporting joint health, the precise molecular mechanism underlying its effects during OA progression remains to be fully elucidated. This study evaluated the therapeutic efficacy of SPG using a monosodium iodoacetate (MIA)-induced mouse model. Methods: A total of 180 male C57BL/6J mice (six-week-old) were utilized, organized into three independent cohorts to analyze distinct analytical endpoints: (1) pain assessment, histology, and immunohistochemistry; (2) mRNA expression analysis for early-stage OA (Day 3); and (3) mRNA expression analysis for the late-stage OA (Day 28). All subjects received daily oral treatment via gavage, commencing 5 days prior to OA induction and continuing until the designated experimental termination points (either Day 3 or Day 28). Each cohort comprised five experimental groups (n = 10–12 per group): a saline-injected Sham group, an MIA-induced Control group, a positive comparator receiving celecoxib (CLX, 20 mg/kg/day), and two groups administered SPG at a dose of 50 or 100 mg/kg/day. Results: Our findings demonstrated that SPG, particularly at the 100 mg/kg dose, significantly mitigated joint pain symptoms, performing comparably to CLX. Histopathological assessments confirmed that SPG effectively preserved the structural integrity of the cartilage matrix and substantially reduced pathological damage, as evidenced by lower Mankin scores. Mechanistically, SPG treatment led to a marked downregulation of degradative enzymes, including matrix metalloproteinase-3 (MMP-3) and a disintegrin and metalloproteinase with thrombospondin motifs 4 (ADAMTS-4), while concurrently normalizing the levels of tissue inhibitors of metalloproteinases (TIMPs). Furthermore, SPG prevented the aberrant, over-compensatory expression of anabolic markers such as SRY-box transcription factor 9 (SOX-9), type II collagen alpha 1 chain (COL2A1), and aggrecan (ACAN) typically observed in the disease’s later stages. While SPG demonstrated a limited impact on broadly pro-inflammatory cytokine profiles, it specifically and significantly reduced interleukin-6 (IL-6) gene expression during the chronic phase. Conclusions: These results suggest that SPG serves as a promising natural agent that maintains articular homeostasis by balancing matrix metabolic pathways, positioning it as a scientifically validated functional food candidate for the management of joint health. Full article
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23 pages, 45505 KB  
Article
Jaceosidin Attenuates Sepsis-Induced Myocardial Dysfunction by Promoting SIRT2-Mediated Inhibition of Histone H3K18 Lactylation
by Huiming Yu, Minfu Liu, Shuwan Hou, Jiaqin Wu, Qianqian Du, Fan Feng, Sixiang Wang, Chunli Wang and Kang Xu
Pharmaceuticals 2026, 19(1), 97; https://doi.org/10.3390/ph19010097 - 4 Jan 2026
Viewed by 183
Abstract
Background: Sepsis-induced myocardial dysfunction (SIMD) is a life-threatening complication with limited therapeutic options. Jaceosidin (JAC), a natural flavonoid from Folium Artemisiae Argyi, shows potential in cardiovascular diseases, but its role and mechanism in SIMD remain unclear. This study aims to investigate the protective [...] Read more.
Background: Sepsis-induced myocardial dysfunction (SIMD) is a life-threatening complication with limited therapeutic options. Jaceosidin (JAC), a natural flavonoid from Folium Artemisiae Argyi, shows potential in cardiovascular diseases, but its role and mechanism in SIMD remain unclear. This study aims to investigate the protective effects of JAC against SIMD and explore the underlying molecular mechanisms. Methods: In vitro, AC16 human cardiomyocytes were stimulated with TNF-α and treated with JAC. Cell viability and apoptosis were assessed using CCK−8 and flow cytometry, respectively. Transcriptomic and metabolomic analyses were performed to identify altered pathways. Molecular docking evaluated JAC’s interaction with SIRT2. The SIRT2 inhibitor AGK2 was used to validate its role. Chromatin immunoprecipitation quantitative PCR (ChIP-qPCR) determined H3K18la enrichment on target gene promoters. In vivo, a murine SIMD model was established via LPS injection, and cardiac function was evaluated by echocardiography. Serum markers (cTnT, CK−MB) and myocardial lactylation levels were measured. Results: JAC significantly attenuated TNF-α−induced injury in AC16 cells by enhancing viability and reducing apoptosis. Multi-omics analyses revealed JAC suppressed glycolysis and lactate production. JAC specifically inhibited histone H3K18 lactylation (H3K18la), and molecular docking indicated strong binding affinity with SIRT2. AGK2 treatment reversed JAC-mediated suppression of H3K18la. ChIP-qPCR confirmed H3K18la directly regulates IL-6, BAX, and BCL-2 expression. In vivo, JAC improved cardiac function (LVEF, LVFS, LVDd, LVDs), reduced serum cTnT and CK−MB levels, and decreased myocardial H3K18la in LPS−treated mice. Conclusions: JAC alleviates SIMD by activating SIRT2, which inhibits H3K18la, thereby modulating inflammatory and apoptotic pathways. This study identifies JAC as a novel metabolic-epigenetic therapeutic agent for SIMD. Full article
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20 pages, 4023 KB  
Article
Prolonged QT Interval in HIV-1 Infected Humanized Mice Treated Chronically with Dolutegravir/Tenofovir Disoproxil Fumarate/Emtricitabine
by Ali Namvaran, Julian V. Garcia, Mahendran Ramasamy, Kayla Nguyen, Farzaneh Tavakkoli Ghazani, Bryan T. Hackfort, Prasanta K. Dash, Reagan E. Fisher, Benson Edagwa, Santhi Gorantla and Keshore R. Bidasee
Int. J. Mol. Sci. 2026, 27(1), 519; https://doi.org/10.3390/ijms27010519 - 4 Jan 2026
Viewed by 315
Abstract
The REPRIEVE Trial recently reported high rates of sudden cardiac death (SCD) middle-aged people living with HIV-1 infection (PWH) using the WHO/NIH-recommended two nucleoside reverse transcriptase inhibitors (NRTIs)/one integrase strand inhibitor (INSTI) regimen to manage HIV-1 viremia. To date, clinically relevant animal models [...] Read more.
The REPRIEVE Trial recently reported high rates of sudden cardiac death (SCD) middle-aged people living with HIV-1 infection (PWH) using the WHO/NIH-recommended two nucleoside reverse transcriptase inhibitors (NRTIs)/one integrase strand inhibitor (INSTI) regimen to manage HIV-1 viremia. To date, clinically relevant animal models to delineate underlying causes for this remain limited. Here, we assessed if HIV-1-infected NOD.Cg-PrkdcscidIl2rgtm1Wjl/SzJ humanized mice (Hu-mice) treated with the WHO/NIH-recommended antiretroviral regimen, dolutegravir (DTG, INSTI)/tenofovir disoproxil fumarate (TDF, NRTIs)/emtricitabine (FTC, NRTIs), can recapitulate abnormalities in the ECG and subclinical structural heart disease that serve as harbingers of SCD in middle-aged PWH. HIV-1-infected and uninfected Hu-mice served as controls. After one month of infection (HIV-1ADA), ECG intervals/segments were significantly altered. ECG changes progressively worsened as the duration of untreated infection increased. Treating HIV-1-infected animals with the DTG/TDF/FTC for eight weeks, starting four weeks after infection, prevented worsening, but did not restore ECG intervals/segments to those before infection. In hearts from DTG/TDF/FTC-treated animals, steady-state levels of the sarco-(endo) plasmic reticulum Ca2+ ATPase (SERCA2) were reduced by 35%. Steady-state levels of type 2 ryanodine receptor (RyR2) did not change, but its phosphorylation status at Ser2808 was 2-fold higher than that of uninfected controls, indicative of a gain-of-function. The density of perfused micro vessels and fibrosis in hearts of DTG/TDF/FTC-treated animals was not significantly different from that of HIV-1-infected and uninfected Hu-mice. These data show for the first time that HIV-1 infection is triggering abnormalities in the ECG of Hu-mice, and changes in ECG persisted with DTG/TDF/FTC treatment, independent of ischemia and/or fibrosis. They also indicate that chronic DTG/TDF/FTC treatment did not worsen ECG changes, including the QT interval. Since phosphorylation of RyR2 at Ser2808 occurs via β-adrenergic activation of protein kinase A, these new data also suggest that chronic hyperadrenergic activity may be increasing the risk of SCD via Ca2+ leak through RyR2. Full article
(This article belongs to the Section Molecular Pathology, Diagnostics, and Therapeutics)
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Article
Serum Oxidized LDL and Interleukin-10 as Biomarkers for Peripheral Artery Disease in Chronic Myeloid Leukemia Patients Receiving Tyrosine Kinase Inhibitor Therapy
by Hernycane Sosilya, Muhammad Noor Diansyah, Merlyna Savitri, Putu Niken Ayu Amrita, Pradana Zaky Romadhon, Hermina Novida, Nadya Luthfah, Ami Ashariati and Siprianus Ugroseno Yudho Bintoro
Hemato 2026, 7(1), 3; https://doi.org/10.3390/hemato7010003 - 4 Jan 2026
Viewed by 139
Abstract
Background/Objectives: Tyrosine kinase inhibitors (TKIs) have transformed the treatment of chronic myeloid leukemia (CML), yet emerging evidence indicates an increased risk of vascular adverse events, particularly peripheral artery disease (PAD). Reliable biomarkers for early detection of TKI-related vascular toxicity are still lacking. Methods: [...] Read more.
Background/Objectives: Tyrosine kinase inhibitors (TKIs) have transformed the treatment of chronic myeloid leukemia (CML), yet emerging evidence indicates an increased risk of vascular adverse events, particularly peripheral artery disease (PAD). Reliable biomarkers for early detection of TKI-related vascular toxicity are still lacking. Methods: A cross-sectional study was conducted on 78 patients with chronic-phase CML treated at Dr. Soetomo General Hospital, Surabaya. PAD was confirmed using ankle–brachial index. Serum oxidized low-density lipoprotein (OxLDL) and interleukin-10 (IL-10) levels were measured using ELISA. Results: PAD was detected in 20% of subjects. The PAD group showed significantly higher OxLDL, lower IL-10, and a markedly elevated OxLDL/IL-10 ratio (all p < 0.001). OxLDL remained independently associated with PAD after adjustment (adjusted OR = 1.132, 95% CI 1.020–1.255, p = 0.019). OxLDL/IL-10 ratio yielded a good diagnostic value (sensitivity 87.5% and specificity of 88.7%). Conclusions: Elevated OxLDL and an increased OxLDL/IL-10 ratio are associated with PAD in CML patients receiving TKI therapy and demonstrated a good diagnostic performance for early detection of TKI-induced vascular toxicity. Full article
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