Regulation of Cellular Signaling Pathways in the Metabolic Syndrome

A special issue of Life (ISSN 2075-1729). This special issue belongs to the section "Physiology and Pathology".

Deadline for manuscript submissions: 28 February 2026 | Viewed by 3269

Special Issue Editors


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Guest Editor
Department of Biology, College of Science and Technology, North Carolina Agricultural and Technical State University, Greensboro, NC, USA
Interests: cell signaling; synthetic biology; systems biology; phosphorylation networks; biochemistry
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Guest Editor
Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
Interests: biochemistry; chemical biology; metabolism aging and development; systems biology and biological regulation

Special Issue Information

Dear Colleagues,

Metabolic syndrome (MetS), which describes a cluster of interrelated conditions that includes central obesity, dyslipidemia, lipid resistance, hypertension, diabetes, and cancer, has become a global public health concern. The pathophysiology of MetS is tightly regulated by a complex network of cellular signaling pathways, including insulin-, AMPK-, MAPK-, mTOR-, PKA-, NF-κB-, and adipokine-mediated signaling, among others. These pathways coordinate metabolic processes such as glucose and lipid metabolism, inflammation, oxidative stress response, and mitochondrial function. Dysregulation of these signaling networks plays a central role in the onset and progression of MetS and its associated complications, including type 2 diabetes, cardiovascular disease, metabolic dysfunction-associated steatotic liver disease (MASLD), and many cancer types. A deeper mechanistic understanding of how these pathways are regulated—both under physiological and pathological conditions—may yield novel biomarkers and therapeutic targets.

Therefore, Life is pleased to announce this Special Issue titled “Regulation of Cellular Signaling Pathways in the Metabolic Syndrome”. This Special Issue aims to bring together cutting-edge research that enhances our understanding of how cellular signaling pathways contribute to the development, progression, and potential treatment of MetS. We invite original research articles, reviews, and short communications that explore the regulation, crosstalk, and therapeutic modulation of cellular signaling in the context of MetS.

Topics of interest include, but are not limited to, the following:

  • Molecular mechanisms of insulin signaling and resistance in MetS;
  • Crosstalk between nutrient-sensing pathways (e.g., AMPK, mTOR, and SIRT) in metabolic regulation.
  • Role of inflammation and immune signaling (e.g., NF-κB and JAK-STAT) in adipose tissue dysfunction;
  • Oxidative stress, mitochondrial signaling, and redox imbalance in metabolic disorders;
  • Adipokine and cytokine signaling in obesity and MetS;
  • ER stress and unfolded protein response pathways in metabolic regulation;
  • Mechanisms by which hallmarks of MetS (e.g., increased IGF signaling, chronic inflammation, adipokine imbalance, oxidative stress, and hormonal changes) impact the etiology and progression of various cancers;
  • Tissue-specific signaling dynamics in liver, muscle, adipose tissue, heart, and brain;
  • Microbiota-derived metabolites and their influence on host signaling in MetS;
  • Emerging therapeutic targets and pharmacological modulators of key signaling nodes;
  • Systems biology and multi-omics approaches to signaling network analysis in MetS.

We look forward to your contributions.

Dr. Robert H. Newman
Dr. Danielle L. Schmitt
Guest Editors

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Keywords

  • metabolic syndrome (MetS)
  • cellular signaling pathways
  • insulin signaling and resistance
  • nutrient-sensing pathways
  • inflammation and immune signaling

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Published Papers (4 papers)

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Research

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16 pages, 1379 KB  
Article
The Impact of Decreased GSK3β and S6K1 Expression in TNBC Patients
by Tijana Tomić, Mirjana Prvanović, Jovan Jevtić, Blagoje Murganić, Nejla Ademović, Milica Nedeljković, Irena Jovanić, Nikola Tanić and Nasta Tanić
Life 2025, 15(12), 1917; https://doi.org/10.3390/life15121917 - 15 Dec 2025
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Abstract
Breast cancer is the most frequent and lethal type of cancer that affects women worldwide. Triple-negative breast cancer (TNBC) is the most aggressive type of breast cancer, having high rate of recurrence, metastasis, and mortality, with very limited options for treatment, and a [...] Read more.
Breast cancer is the most frequent and lethal type of cancer that affects women worldwide. Triple-negative breast cancer (TNBC) is the most aggressive type of breast cancer, having high rate of recurrence, metastasis, and mortality, with very limited options for treatment, and a tendency to develop resistance to conventional therapy. These circumstances mean that it is necessary to develop effective therapies for TNBC patients which would circumvent resistance mechanisms. The PAM and Wnt signaling pathways are among those responsible for therapy resistance in TNBC, as they also have major roles in different cellular processes such as metabolism, proliferation, metastasis, stemness, and survival. We analysed the expression of GSK3β and S6K1 as interacting components of the two pathways in order to examine the relation between them and determine whether they could be used as predictive markers in TNBC. The expression of mRNA was examined with real-time PCR and protein expression with immunohistochemistry. Our results showed that protein expression is in line with mRNA expression. We found a positive correlation between the mRNA expressions of GSK3β and S6K1, showing their coordinated transcription. We also showed that their simultaneous low expression is unfavorable for TNBC patients and could possibly be used as a predictive marker. Full article
(This article belongs to the Special Issue Regulation of Cellular Signaling Pathways in the Metabolic Syndrome)
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15 pages, 698 KB  
Article
Proarrhythmogenic Echocardiographic Markers in Metabolic Syndrome: A Cross-Sectional Study
by Spas Kitov, Maria-Florance Kitova, Boyan Nonchev, Mariya Tokmakova and Lyudmila Kitova
Life 2025, 15(9), 1443; https://doi.org/10.3390/life15091443 - 15 Sep 2025
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Abstract
In metabolic syndrome, cardiomyocyte changes induced by metabolic and proinflammatory factors impair repolarization and exacerbate the heterogeneity of the transmural dispersion of repolarization, and this is proarrhythmogenic. Limited data in the literature on the capabilities of speckle tracking echocardiography for assessing proarrhythmogenicity in [...] Read more.
In metabolic syndrome, cardiomyocyte changes induced by metabolic and proinflammatory factors impair repolarization and exacerbate the heterogeneity of the transmural dispersion of repolarization, and this is proarrhythmogenic. Limited data in the literature on the capabilities of speckle tracking echocardiography for assessing proarrhythmogenicity in metabolic syndrome exists. 71 patients with newly diagnosed metabolic syndrome, aged 35–55 years, were studied. Ischemic heart disease was excluded in all patients with stress test cycle ergometry, CT-angiography or selective coronary angiography. All patients underwent a 48-h Holter ECG recording. Based on the latter, they were divided into two groups: 38 patients (53.5%) with a high arrhythmogenic load (supraventricular or ventricular tachycardia, atrial fibrillation/flutter, ventricular extrasystoles over 10%, frequent supraventricular extrasystoles > 500/24 h are included); and 33 patients (46.5%) with low arrhythmogenic load (no significant rhythm disturbances are included). Echocardiography was performed with a GE Vivid T9 emphasizing global longitudinal strain, mechanical dispersion index and left atrium strains. Statistically significant differences in the global longitudinal strain, mechanical dispersion index, and left atrium strain were found between the group with low arrhythmogenicity and the group with high arrhythmogenicity (p < 0.0001). The index of mechanical dispersion has the most optimal sensitivity and specificity of all investigated echocardiographic markers. These results support the mechanical dispersion index as an additional tool for assessing proarrhythmogenicity in metabolic syndrome. Full article
(This article belongs to the Special Issue Regulation of Cellular Signaling Pathways in the Metabolic Syndrome)
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15 pages, 8949 KB  
Article
Protein Expression of TXNIP in the Dopaminergic Neurons of Subjects with Parkinson’s Disease: Evidence from a Pilot Study
by Francesca A. Schillaci, Giuseppe Lanza, Maria Grazia Salluzzo, Raffaele Ferri and Michele Salemi
Life 2025, 15(8), 1252; https://doi.org/10.3390/life15081252 - 7 Aug 2025
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Abstract
Parkinson’s disease (PD) is a progressive, multisystemic α-synucleinopathy, recognized as the second most prevalent neurodegenerative disorder globally. Its neuropathology is characterized by the degeneration of dopaminergic neurons, particularly in the substantia nigra pars compacta (SNpc), and the intraneuronal accumulation of α-synuclein-forming Lewy bodies. [...] Read more.
Parkinson’s disease (PD) is a progressive, multisystemic α-synucleinopathy, recognized as the second most prevalent neurodegenerative disorder globally. Its neuropathology is characterized by the degeneration of dopaminergic neurons, particularly in the substantia nigra pars compacta (SNpc), and the intraneuronal accumulation of α-synuclein-forming Lewy bodies. Oxidative stress is a key contributor to PD pathogenesis. Thioredoxin-interacting protein (TXNIP) is a crucial regulator of cellular redox balance, inhibiting the antioxidant function of thioredoxin. This pilot study aimed to investigate the protein expression and localization of TXNIP in the SNpc of PD patients compared to healthy controls. We performed immunohistochemical analyses on 12 post-mortem human brain sections (formalin-fixed, paraffin-embedded) from six subjects with PD and six healthy controls. The study was performed on PD subjects with Braak stage 6. Our findings revealed that in control samples, TXNIP protein was distinctly and closely associated with neuromelanin (NM) pigment within the cytoplasm of SNpc dopaminergic neurons. Conversely, in PD samples, there was a markedly weak cytoplasmic expression of TXNIP, and critically, this association with NM pigment was absent. Furthermore, PD samples exhibited a significant reduction in both dopaminergic neurons and NM content, consistent with advanced disease. These findings, which mirror previous transcriptomic data showing TXNIP gene under-expression in the same subjects, suggest that altered TXNIP expression and localization in SNpc dopaminergic neurons are features of late-stage PD, potentially reflecting neuronal dysfunction and loss. Full article
(This article belongs to the Special Issue Regulation of Cellular Signaling Pathways in the Metabolic Syndrome)
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Review

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17 pages, 1561 KB  
Review
Probiotics and Phytoantioxidants Target Coronary Endothelial Dysfunction in Irregular Sleep- and Obesity-Associated Cardiometabolic Syndrome
by Chi-Nan Tseng and Yen Chu
Life 2025, 15(11), 1740; https://doi.org/10.3390/life15111740 - 12 Nov 2025
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Abstract
Coronary endothelial dysfunction is an early and critical vascular abnormality in cardiometabolic syndrome, intensified by irregular sleep patterns and excess adiposity. Disruption of circadian rhythm and accumulation of visceral fat impair nitric oxide signaling and promote arterial stiffness through endothelial injury. The gut [...] Read more.
Coronary endothelial dysfunction is an early and critical vascular abnormality in cardiometabolic syndrome, intensified by irregular sleep patterns and excess adiposity. Disruption of circadian rhythm and accumulation of visceral fat impair nitric oxide signaling and promote arterial stiffness through endothelial injury. The gut vascular axis further contributes via microbial imbalance and endotoxin translocation, elevating systemic inflammation and vascular stress. Clinical evidence indicates that probiotics restore microbial equilibrium and attenuate vascular damage. Phytoantioxidants such as curcumin, berberine, and epigallocatechin gallate exert endothelial protective effects by enhancing nitric oxide synthase activity and suppressing inflammatory mediators. These compounds also activate the nuclear factor erythroid two related factor two (Nrf2) pathway, which regulates oxidative balance and promotes vascular resilience. Together, probiotics and phytoantioxidants represent a promising integrative approach to mitigate coronary endothelial dysfunction in populations affected by sleep disturbance and obesity. This review narratively integrates current molecular and clinical findings to delineate precision-guided pathways for endothelial recovery and cardiometabolic risk reduction. Full article
(This article belongs to the Special Issue Regulation of Cellular Signaling Pathways in the Metabolic Syndrome)
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