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Search Results (529)

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Keywords = non-invasive molecular imaging

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46 pages, 19374 KB  
Review
The Invasive Margin of Glioblastoma as a Molecular Ecosystem: Spatial Heterogeneity, Tumor–Host Interactions, and Therapeutic Opportunities
by Nikodem Kuczyński, Dawid Larysz, Dorota Uchman-Rzeżnik, Gunawan Irianto and Dawid Pilewski
Int. J. Mol. Sci. 2026, 27(16), 7449; https://doi.org/10.3390/ijms27167449 - 20 Aug 2026
Viewed by 133
Abstract
Glioblastoma (GBM) recurs predominantly from infiltrative disease that persists beyond the contrast-enhancing tumor (CET). This structured narrative review aims to define the invasive margin and peritumoral brain zone (PBZ) as a spatially organized molecular ecosystem, summarize the approaches used to interrogate this compartment, [...] Read more.
Glioblastoma (GBM) recurs predominantly from infiltrative disease that persists beyond the contrast-enhancing tumor (CET). This structured narrative review aims to define the invasive margin and peritumoral brain zone (PBZ) as a spatially organized molecular ecosystem, summarize the approaches used to interrogate this compartment, and evaluate how malignant-cell plasticity, host niches, and treatment-induced remodeling contribute to minimal residual disease and recurrence. A structured literature search of PubMed/MEDLINE, Scopus, and Web of Science identified the clinical, translational, preclinical, and review literature available through July 2026; evidence was synthesized qualitatively, with priority given to human tissue studies and single-cell or spatially resolved analyses. Across studies, the margin differs from both tumor core and normal brain and contains heterogeneous malignant states interacting with neural, vascular, immune, hypoxic, and extracellular-matrix-supported niches. Surgery, radiotherapy, and systemic treatment further reshape these interactions through inflammation, vascular injury, senescence, hypoxia, and fibrosis. The main translational challenge is therefore not simply to control the CET, but to identify biologically high-risk non-enhancing tissue and demonstrate that therapy reaches and modifies it. We propose three priorities: image-registered characterization of residual compartments, regional measurement of drug exposure and target engagement, and integration of local margin control with distributed and niche-directed treatment. Prospective validation is required before spatial PBZ biomarkers can guide routine care. Full article
(This article belongs to the Special Issue Molecular Insights into Glioblastoma Pathogenesis and Therapeutics)
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21 pages, 1528 KB  
Article
Evaluation of Site-Specific Radioiodination of Anti-EGFR-Targeted DARPin E01 Using (4-Hydroxyphenyl)ethyl Maleimide
by Mariia Larkina, Gleb Yanovich, Lutfi A. Hasnowo, Ruslan Varvashenya, Daria Eskova, Ivan Sharychev, Anastasia Prach, Evgenii Plotnikov, Roman Zelchan, Alexey Schulga, Elena Konovalova, Rustam H. Ziganshin, Mikhail Belousov, Vladimir Tolmachev and Sergey M. Deyev
Int. J. Mol. Sci. 2026, 27(16), 7438; https://doi.org/10.3390/ijms27167438 - 20 Aug 2026
Viewed by 105
Abstract
Non-invasive radionuclide molecular imaging of epidermal growth factor receptor (EGFR) expression can guide patient stratification for EGFR-targeted therapies. The designed ankyrin repeat protein (DARPin) E01, which binds EGFR ectodomain III with sub-nanomolar affinity, is a promising scaffold for single-photon emission computed tomography (SPECT) [...] Read more.
Non-invasive radionuclide molecular imaging of epidermal growth factor receptor (EGFR) expression can guide patient stratification for EGFR-targeted therapies. The designed ankyrin repeat protein (DARPin) E01, which binds EGFR ectodomain III with sub-nanomolar affinity, is a promising scaffold for single-photon emission computed tomography (SPECT) imaging probes. In the present study, we compared site-specific radioiodination of DARPin E01 using the bifunctional prosthetic group (4-hydroxyphenyl)ethyl maleimide (HPEM) with site-unspecific radioiodination via [123I]I-para-iodobenzoate (PIB). [123I]I-HPEM was conjugated to the C-terminus of DARPin E01 via Glu-Glu-Glu-Cys ([123I]I-E01-E3C-HPEM) or Gly-Gly-Gly-Cys ([123I]I-E01-G3C-HPEM) linkers. Radiolabelling yields were 6 ± 2% and 13 ± 5%, respectively. Size-exclusion purification provided radiochemical purity > 98%. Both HPEM conjugates retained nanomolar EGFR-binding affinity (KD: 3.2 ± 0.6 and 4.8 ± 0.9 nM) and demonstrated EGFR-specific tumour accumulation in A-431 xenografts. Cellular processing was characterised by rapid binding, slow internalisation, and non-residualising behaviour of all variants. Kidney uptake was lower for the site-specifically labelled variants. However, site-specific labelling evidently elevated hepatobiliary excretion and uptake in Na/I-symporter-expressing organs compared to [123I]I-(HE)3-E01-PIB, while linker composition (E3C vs. G3C) did not significantly alter biodistribution. Site-unspecific radioiodination with [123I]I-PIB remains the preferred approach for clinical SPECT imaging of EGFR expression with DARPin E01. Full article
(This article belongs to the Special Issue Molecular Imaging for Cancer Theranostics)
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24 pages, 707 KB  
Review
Role of CXCR4 PET Imaging for the Evaluation of Gliomas: A Comprehensive Literature Review
by Francesco Dondi, Pietro Bellini, Michela Cossandi, Roberto Rinaldi, Luca Camoni, Francesca Tomasoni, Massimo Statuto, Gian Luca Viganò and Francesco Bertagna
Cancers 2026, 18(16), 2657; https://doi.org/10.3390/cancers18162657 - 17 Aug 2026
Viewed by 279
Abstract
C-X-C chemokine receptor type 4 (CXCR4)-targeted positron emission tomography (PET) radiotracers have recently emerged as promising molecular imaging tools for glioma evaluation because of their negligible physiological uptake in normal brain tissue and their ability to non-invasively assess CXCR4 expression. This narrative review [...] Read more.
C-X-C chemokine receptor type 4 (CXCR4)-targeted positron emission tomography (PET) radiotracers have recently emerged as promising molecular imaging tools for glioma evaluation because of their negligible physiological uptake in normal brain tissue and their ability to non-invasively assess CXCR4 expression. This narrative review summarizes the current evidence regarding their clinical applications in glioma imaging. a literature review was performed to identify clinical studies investigating CXCR4-targeted PET in glioma patients. The available evidence, although limited and heterogeneous, indicates that CXCR4-targeted PET tracers can provide high lesion-to-background contrast because of their minimal physiological uptake in normal brain tissue. Tracer uptake tends to be higher in high-grade gliomas, although correlations with histopathological CXCR4 expression and established prognostic biomarkers have been inconsistent. Preliminary studies have explored potential applications in tumor visualization, differentiation of recurrence from treatment-related changes, distinction between glioblastoma and primary central nervous system lymphoma, treatment response assessment, and radiotherapy planning. These findings require validation in larger prospective multicenter cohorts. CXCR4-targeted PET is an emerging molecular imaging approach that may provide complementary information in glioma assessment. However, the available evidence remains preliminary, and larger prospective multicenter studies are required to validate its diagnostic and clinical utility, standardize imaging and quantification protocols, and determine its role in routine neuro-oncological practice. Full article
(This article belongs to the Special Issue Updates in Cancer Imaging: PET/CT, MRI and Beyond)
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22 pages, 870 KB  
Systematic Review
MicroRNAs as Biomarkers for Adenomyosis: A Systematic Review
by Paula Buehler, Angela Vidal, Cloé Vaineau, Tanya Karrer and Michael Mueller
Biomedicines 2026, 14(8), 1764; https://doi.org/10.3390/biomedicines14081764 - 5 Aug 2026
Viewed by 317
Abstract
Background/Objectives: Adenomyosis is a chronic gynecological disorder characterized by the presence of endometrial tissue within the myometrium, causing pelvic pain, abnormal uterine bleeding, and infertility. Despite its high prevalence, the molecular mechanisms underlying disease initiation and progression remain incompletely understood. Current evidence [...] Read more.
Background/Objectives: Adenomyosis is a chronic gynecological disorder characterized by the presence of endometrial tissue within the myometrium, causing pelvic pain, abnormal uterine bleeding, and infertility. Despite its high prevalence, the molecular mechanisms underlying disease initiation and progression remain incompletely understood. Current evidence implicates disruption of the endometrial–myometrial interface, epithelial–mesenchymal transition, and progesterone resistance in driving tissue invasion and remodeling. Diagnosis relies mainly on imaging modalities, while reliable non-invasive biomarkers are lacking. MicroRNAs, as stable post-transcriptional regulators of gene expression, have emerged as key modulators of proliferation, inflammation, and hormonal signaling, and represent promising candidates for novel diagnostic strategies. Methods: A systematic review was conducted in accordance with PRISMA guidelines and registered with PROSPERO (CRD42025637752). A comprehensive search of the Medline, Embase, Scopus, and Cochrane databases was performed in April 2025. Studies investigating miRNA expression in patients with adenomyosis compared with controls were included. The quality of the studies and the risk of bias were assessed using the Newcastle–Ottawa scale. Two reviewers independently performed study selection, data extraction, and quality assessment. Results: Twenty-seven studies published between 2015 and 2025 met the inclusion criteria. Thirty-nine distinct miRNAs were reported as significantly dysregulated in adenomyosis. Recurrently altered miRNAs included let-7a, miR-145, miR-10b, miR-30c-5p, miR-141-3p, miR-143, and miR-191. Functional analyses have consistently implicated miRNAs in key pathogenic pathways, including Hippo-YAP, PI3K/AKT, MAPK/ERK, JAK/STAT, and Wnt/β-catenin signaling. These alterations were associated with enhanced epithelial–mesenchymal transition, increased cellular proliferation and migration, progesterone resistance, chronic inflammation, and immune modulation. Emerging evidence highlights exosomal and circulating miRNAs as promising non-invasive biomarkers, with a few studies already demonstrating diagnostic potential using serum, plasma, or urine samples. However, substantial heterogeneity in tissue types, sampling timing, and analytical methods precluded meta-analysis. Conclusions: MiRNAs play a central role in the molecular pathogenesis of adenomyosis and show strong potential as non-invasive diagnostic biomarkers. However, large-scale validation studies and standardized methodologies are required before clinical implementation. Full article
(This article belongs to the Special Issue Advanced Research of Non-Coding RNAs in Health and Disease)
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37 pages, 2226 KB  
Review
Superficial Peritoneal Endometriosis Beyond Surgical Diagnosis: A Narrative Review of Emerging Functional and Molecular Perspectives
by Mario Palumbo, Giuseppe D’Angelo, Dario Colacurci, Giorgio Maria Baldini, Marco La Verde, Rafał Watrowski, Vito Carone, Giuseppe Bifulco, Pierluigi Giampaolino and Luigi Della Corte
Medicina 2026, 62(8), 1488; https://doi.org/10.3390/medicina62081488 - 2 Aug 2026
Viewed by 439
Abstract
Background and Objectives: Superficial peritoneal endometriosis (SPE) remains one of the most difficult endometriosis phenotypes to diagnose non-invasively, because lesions are frequently small, multifocal, and poorly detectable using conventional imaging. Diagnostic laparoscopy therefore remains the reference standard for direct visualization of superficial [...] Read more.
Background and Objectives: Superficial peritoneal endometriosis (SPE) remains one of the most difficult endometriosis phenotypes to diagnose non-invasively, because lesions are frequently small, multifocal, and poorly detectable using conventional imaging. Diagnostic laparoscopy therefore remains the reference standard for direct visualization of superficial peritoneal lesions. However, the inconsistent relationship between visible lesion burden and pain severity, together with the multifactorial nature of chronic pelvic pain, highlights the limitations of a purely lesion-based diagnostic model. This narrative review reassesses SPE from a cautious functional and molecular perspective, focusing on clinically established evidence, emerging but incompletely validated tools, and hypothesis-generating concepts. The novelty of this review lies in its specific focus on SPE as an unresolved diagnostic phenotype and in the proposed integration of surgical diagnosis, expert imaging, pain phenotyping, empirical treatment response, and molecular research within a non-replacement framework. Materials and Methods: A narrative literature review was performed using PubMed/MEDLINE, Scopus, Web of Science, and the Cochrane Library for English-language articles published between January 2010 and April 2026. The search focused on SPE, diagnostic laparoscopy, dynamic transvaginal ultrasound, sliding sign, chronic pelvic pain, hormonal treatment response, neuroinflammation, liquid biopsy, circulating biomarkers, epigenetics, and microbiome research. Results: Dynamic transvaginal ultrasound, sliding sign assessment, pelvic organ mobility evaluation, and tenderness-guided examination may provide indirect functional information in selected patients with suspected SPE, but they remain operator-dependent and insufficiently standardized for this phenotype. Response to hormonal therapy may support clinical reasoning, but it has low specificity and may also reflect improvement of adenomyosis, primary dysmenorrhea, ovulation-related pain, abnormal uterine bleeding, or other estrogen-sensitive conditions. Liquid biopsy and molecular biomarkers, including circulating microRNAs, extracellular vesicles, cell-free DNA, inflammatory mediators, epigenetic signatures, adipokine-related markers, and microbiome-related signals, remain investigational and require phenotype-specific validation. Conclusions: Functional and molecular stratification of suspected SPE represents a promising research direction rather than a current clinical standard. Laparoscopy remains essential when definitive diagnosis or surgical treatment is required, particularly in patients with infertility, refractory symptoms, suspicious imaging, or suspected complex disease. Future validated models may help integrate clinical phenotype, expert imaging, treatment response, pain mechanisms, and molecular profiles to support more individualized and selective diagnostic pathways. Full article
(This article belongs to the Section Surgery)
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26 pages, 3685 KB  
Review
Clinical Applications of Hyperpolarized Magnetic Resonance Imaging in Brain Tumors: Current Evidence and Future Opportunities
by Riccardo Serra, Siddharth R. Shah, Adarsha P. Malla, Tina Wang, Alexander Ksendzovsky, Dirk Mayer, Eli E. Bar and Graeme F. Woodworth
Cancers 2026, 18(15), 2462; https://doi.org/10.3390/cancers18152462 - 31 Jul 2026
Viewed by 577
Abstract
Brain tumors exhibit extensive metabolic reprogramming that supports proliferation, invasion, therapeutic resistance, and adaptation to dynamic microenvironmental conditions. These alterations provide opportunities for metabolic imaging approaches that extend beyond conventional anatomical neuroimaging. Hyperpolarized magnetic resonance imaging (hpMRI) has emerged as a novel metabolic [...] Read more.
Brain tumors exhibit extensive metabolic reprogramming that supports proliferation, invasion, therapeutic resistance, and adaptation to dynamic microenvironmental conditions. These alterations provide opportunities for metabolic imaging approaches that extend beyond conventional anatomical neuroimaging. Hyperpolarized magnetic resonance imaging (hpMRI) has emerged as a novel metabolic imaging platform capable of non-invasively visualizing real-time cellular metabolism through dynamic nuclear polarization of carbon-13-labeled substrates. By dramatically enhancing magnetic resonance signal intensity, hpMRI enables interrogation of enzyme-specific metabolic pathways and provides unique insight into tumor energetics, metabolic heterogeneity, and treatment response. The distinct contribution of this review is an updated, brain tumor-specific, clinically oriented framework that integrates recent human evidence with longitudinal metabolic phenotyping, emerging pathway-specific probes, acquisition standardization, multimodal validation, and the remaining barriers to clinical implementation. Particular emphasis is placed on hyperpolarized [1-13C]pyruvate, which has demonstrated feasibility and safety in patients with gliomas and has enabled assessment of glycolytic metabolism, oxidative phosphorylation, tumor recurrence, and longitudinal treatment response. Serial changes in lactate and bicarbonate flux may also reflect evolution toward more glycolytic, heterogeneous, and treatment-resistant tumor phenotypes, supporting the potential prognostic value of hpMRI before conventional radiographic progression becomes evident. We also review emerging applications involving α-ketoglutarate metabolism, redox biology, glutathione cycling, perfusion imaging, and molecular characterization of clinically relevant alterations including IDH1, TERT, and c-MYC-associated metabolic programs. In addition, we discuss recent advances in acquisition methods, image standardization, and multimodal integration with conventional MRI and positron emission tomography. Although several technical and logistical challenges remain, hpMRI is an investigational, radiation-free metabolic imaging modality with potential applications in diagnosis, molecular stratification, and treatment monitoring; however, substantial technical, regulatory, logistical, and economic barriers currently limit routine clinical use, molecular stratification, therapeutic monitoring, and precision medicine approaches in neuro-oncology. Continued clinical translation and development of novel metabolic probes may further expand its role in brain tumors and other neurological diseases. Full article
(This article belongs to the Special Issue Novel Insights into Glioblastoma and Brain Metastases (2nd Edition))
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20 pages, 1154 KB  
Review
Visceral Obesity and Its Complications: The Role of Bioelectrical Impedance Analysis in Longevity Medicine
by Mario Mariotti, Valentina Merenda, Francesca Arrigoni and Nadia Tamburlin
Metabolites 2026, 16(8), 535; https://doi.org/10.3390/metabo16080535 - 29 Jul 2026
Viewed by 367
Abstract
Background: Visceral obesity is increasingly recognised not as a simple excess of adipose tissue, but as a systemic pathological condition characterised by profound metabolic, endocrine, and immune dysregulation. Visceral adipose tissue (VAT) operates as an autonomous neuro-immune-endocrine organ whose dysfunctional expansion drives insulin [...] Read more.
Background: Visceral obesity is increasingly recognised not as a simple excess of adipose tissue, but as a systemic pathological condition characterised by profound metabolic, endocrine, and immune dysregulation. Visceral adipose tissue (VAT) operates as an autonomous neuro-immune-endocrine organ whose dysfunctional expansion drives insulin resistance, atherogenesis, and accelerated cellular ageing through mechanisms converging on chronic low-grade sterile inflammation, referred to as inflammaging. Objectives: This narrative review integrates evidence across four domains: (1) the multi-system clinical complications of visceral obesity and the methodological controversies surrounding its measurement; (2) the cellular heterogeneity, immunometabolic reprogramming, and molecular mechanisms through which excess VAT accelerates biological ageing, with a focus on genomic instability, mitochondrial dysfunction, the NAD+/sirtuin regulatory axis, cellular senescence, and inter-organ communication; (3) the role of bioelectrical impedance analysis (BIA)—particularly phase angle—as a non-invasive functional biomarker of biological age and longevity, positioned critically against alternative assessment methods; and (4) current knowledge gaps and priorities for future research. Methods: A narrative review of PubMed/MEDLINE, Google Scholar, and the Cochrane Library was conducted using MeSH terms and free-text keywords including visceral obesity, bioelectrical impedance analysis, phase angle, sarcopenia, inflammaging, mitochondrial dysfunction, cellular senescence, epigenetic clocks, NAD+, sirtuin, and longevity, supplemented by citation-tracking of retrieved reviews. English-language articles published up to April 2025 were considered, prioritising systematic reviews, meta-analyses, and prospective cohort studies; formal risk-of-bias tools and quantitative synthesis were not applied, consistent with a narrative review design. Results and Discussion: BIA-derived phase angle constitutes a macroscopic electrobiological correlate of inflammaging: low phase angle values in visceral obese subjects overlap with those of frail elderly individuals, reflecting impaired membrane integrity, loss of active cell mass, and altered ICW/ECW balance. However, this evidence base remains largely cross-sectional and correlative; the directionality and population-specific calibration of BIA-derived indices constitute the principal unresolved methodological questions. Integration with epigenetic clocks, circulating NAD+ levels, and gut microbiome indices offers a framework for dynamic biological age assessment, though prospective interventional validation is still lacking. Sarcopenic obesity, evaluated through EWGSOP2 combined with BIA-derived skeletal muscle mass index and handgrip dynamometry, represents a critical comorbidity demanding integrated therapeutic targeting. Conclusions: BIA provides a quantitative, accessible correlate for translating cellular metabolic health into clinically actionable parameters, complementary to rather than a replacement for anthropometric and imaging-based methods. Optimising phase angle and reducing VAT through anti-inflammatory nutrition, exercise, and nutraceutical strategies targeting the NAD+/sirtuin and mTOR/AMPK axes constitutes a measurable objective for the promotion of healthy longevity, contingent on the longitudinal, mechanistic studies identified as priorities in this review. Full article
(This article belongs to the Section Endocrinology and Clinical Metabolic Research)
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16 pages, 18729 KB  
Article
Gadoxetic Acid-Enhanced T1 Mapping Enables Transporter-Mediated Molecular Imaging of Liver Functional Reserve
by Yuting Zhu, Xun Hu, Zhuo Shi, Yuan Liang, Dengfeng Li, Peiqing Ma, Dong Yan, Jianwei Liang and Qian Wang
Biomedicines 2026, 14(8), 1695; https://doi.org/10.3390/biomedicines14081695 - 28 Jul 2026
Viewed by 322
Abstract
Aim: To establish and validate a quantitative transporter-mediated imaging framework based on gadoxetic acid-enhanced T1 mapping for assessing liver functional reserve (LFR) and to investigate the physiological significance of the relative change in longitudinal relaxation rate (ΔR1%) as a quantitative imaging biomarker. Methods: [...] Read more.
Aim: To establish and validate a quantitative transporter-mediated imaging framework based on gadoxetic acid-enhanced T1 mapping for assessing liver functional reserve (LFR) and to investigate the physiological significance of the relative change in longitudinal relaxation rate (ΔR1%) as a quantitative imaging biomarker. Methods: Female C57BL/6J mice (6–8 weeks old) representing five experimental liver conditions (control, transporter-deficient Slco1b2/Slco1a5 double-knockout, carbon tetrachloride-induced fibrosis, methionine–choline-deficient diet-induced steatohepatitis, and alcohol-associated fatty liver disease; n = 6 per group) underwent serial Gd-EOB-DTPA-enhanced T1 mapping. Quantitative ΔR1% was calculated to characterize hepatobiliary enhancement kinetics. Liver functional reserve was independently evaluated using multispectral optoacoustic tomography of indocyanine green (ICG) pharmacokinetics and serum ICG retention assays, with histopathological and hepatocellular transporter analyses performed for mechanistic validation. Longitudinal data were analyzed using restricted maximum likelihood (REML)-based mixed-effects models. Intergroup comparisons were performed using one-way ANOVA or Kruskal–Wallis tests with appropriate post hoc analyses, and associations between imaging and functional parameters were evaluated using Spearman rank correlation analysis. A two-sided p < 0.05 was considered statistically significant. Results: Five experimental liver models exhibited distinct transporter-dependent hepatobiliary enhancement patterns. The transporter-deficient knockout mice showed minimal enhancement, whereas fibrosis and steatotic liver injury models demonstrated intermediate but clearly distinguishable functional profiles. Longitudinal mixed-effects analysis identified significant effects of time, experimental group, and time-by-group interaction on ΔR1% dynamics (all p < 0.0001). Although MRI-derived ΔR1% parameters were not significantly correlated with regional optoacoustic ICG kinetics, ΔR1% area under the curve showed a strong inverse correlation with serum ICG retention at 600 s (r = −0.729, p < 0.0001), indicating that MRI-derived ΔR1% and ICG-based measurements provide complementary rather than interchangeable assessments of liver function. Histological and molecular analyses further demonstrated marked heterogeneity in fibrosis, steatosis, and hepatobiliary transporter expression across models, whereas transporter abundance alone did not consistently predict imaging-derived functional performance. Conclusions: Quantitative Gd-EOB-DTPA-enhanced T1 mapping provides a transporter-mediated imaging framework for evaluating hepatic functional reserve across mechanistically distinct liver injury models. As a normalized quantitative imaging biomarker, ΔR1% captures the integrated functional consequences of hepatobiliary transport dysfunction and complements established liver function tests. These findings support the translational potential of quantitative T1 mapping as a standardized, noninvasive approach for assessing liver functional reserve. Full article
(This article belongs to the Section Molecular and Translational Medicine)
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40 pages, 1196 KB  
Review
Metabolic Rewiring in MASLD: From Disease Mechanisms to Precision Medicine
by Amedeo Lonardo and Ralf Weiskirchen
Metabolites 2026, 16(8), 529; https://doi.org/10.3390/metabo16080529 - 27 Jul 2026
Viewed by 847
Abstract
Background/Objectives: Metabolic dysfunction-associated steatotic liver disease (MASLD), a leading cause of chronic liver disease, encompasses a continuum from steatosis to metabolic dysfunction-associated steatohepatitis (MASH), fibrosis, cirrhosis, and hepatocellular carcinoma. This review aimed to synthesize current evidence on how metabolomic, lipidomic, and spatial [...] Read more.
Background/Objectives: Metabolic dysfunction-associated steatotic liver disease (MASLD), a leading cause of chronic liver disease, encompasses a continuum from steatosis to metabolic dysfunction-associated steatohepatitis (MASH), fibrosis, cirrhosis, and hepatocellular carcinoma. This review aimed to synthesize current evidence on how metabolomic, lipidomic, and spatial multi-omic approaches illuminate MASLD pathogenesis and support precision hepatology. Methods: A structured narrative review was conducted through searches of PubMed, Scopus, and Web of Science, complemented by manual screening of key references. Studies were prioritized when they addressed MASLD biology, metabolic rewiring, lipid remodeling, mitochondrial dysfunction, inflammatory and fibrogenic pathways, gut–liver–adipose crosstalk, biomarker development, or therapeutic monitoring. Results: The reviewed evidence identifies MASLD as a systemic metabolic disorder shaped by excess lipid flux, enhanced de novo lipogenesis, impaired mitochondrial adaptation, oxidative and endoplasmic reticulum stress, sterile inflammation, and hepatic stellate-cell activation. Recurrent metabolomic signatures include altered amino acid, fatty acids, bile acid, and microbial co-metabolite pathways. Lipidomic studies consistently implicate depletion of protective polyunsaturated fatty acids, lysophosphatidylcholines, and phosphatidylcholines, in association with accumulation of diacylglycerols and ceramides, in the transition from steatosis to MASH and fibrosis. Emerging spatial and multi-omic analyses further resolve cell-specific metabolic niches involving hepatocytes, macrophages, endothelial cells, and stellate cells. Conclusions: Metabolomics provides a mechanistic and translational bridge between molecular injury, histological progression, and non-invasive risk stratification in MASLD. Future progress requires standardized analytical workflows, longitudinal validation, causal pathway interrogation, and integration with imaging, genetics, microbiome profiling, and treatment-response phenotyping. Clinical implementation will require standardized platforms, transparent metabolite identification, external validation across diverse populations, cost-effectiveness analyses, and regulatory-grade evidence of clinical utility. Full article
(This article belongs to the Special Issue Metabolomics and MASLD: Pathways, Biomarkers, and Clinical Insights)
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27 pages, 393 KB  
Review
Current Clinical Perspectives of Biomarkers in Respiratory Diseases: A Narrative Review
by Swathi Gurajala, Shoug Yousif Al Humoud, Ghada Fouad Al Yousif, Rana Ali Alameri, Gayathri Pandurangam, Aya Khalid Ali Fayyomi, Sally Abed, Nada Sami Sardidi, Mashael Mamdouh Alrayes, Tarfah Ahmed Alsabhan, Sarah Hassan Alajmi, Anfal Alfaraj and Nada Al Ghannam
J. Clin. Med. 2026, 15(14), 5708; https://doi.org/10.3390/jcm15145708 - 21 Jul 2026
Viewed by 855
Abstract
Respiratory medicine is transitioning from symptom-driven, standardized care to a more precise, patient-specific approach guided by molecular profiling. This evolution is being enabled by advances in liquid biopsy, multiomics, and artificial intelligence (AI) analytics. Fractional exhaled nitric oxide (FeNO) and blood eosinophils, the [...] Read more.
Respiratory medicine is transitioning from symptom-driven, standardized care to a more precise, patient-specific approach guided by molecular profiling. This evolution is being enabled by advances in liquid biopsy, multiomics, and artificial intelligence (AI) analytics. Fractional exhaled nitric oxide (FeNO) and blood eosinophils, the two commonly used markers in asthma, are now being joined by more precise airway markers such as galectin-10, which could aid clinicians in making more informed decisions for biological treatments. In chronic obstructive pulmonary disease (COPD) similar progress is underway, with treatment now emphasizing inflammation endotypes, especially eosinophilic patterns, to direct therapeutic choices. Alongside these developments, routine blood-based ratios (e.g., platelet-to-lymphocyte and neutrophil-to-lymphocyte) are being explored as predictors of exacerbation risk, and forced oscillation testing (FOT) is proving useful for picking up early disease shifts. In more severe conditions, biomarkers are linked to an early and better prognosis, enabling timely intervention. Markers like Matrix metalloproteinase-7 (MMP-7) and CC chemokine ligand 18 (CCL18) have proven to be reliable indicators of mortality and disease progression in idiopathic pulmonary fibrosis. Meanwhile, in lung cancer, liquid biopsies, especially those measuring circulating tumor DNA and micro-RNA (miRNA) panels, are enhancing screening accuracy while helping to cut down on the high false-positive rates seen with low-dose computerised tomography (CT). Other respiratory conditions such as bronchiectasis, pulmonary embolism, pneumonia, and acute respiratory distress syndrome (ARDS) are also benefiting from biomarker advances. At the same time there is a growing push to standardize how these biomarkers are measured. AI-based clinical decision support systems are also playing an increasingly important role in the translation of all these complicated data into actionable clinical insights. Together these developments pave the way for improved respiratory care that is precise and responsive to individual patient needs. Full article
17 pages, 7784 KB  
Review
The Glymphatic System and Neurosurgery: A Comprehensive Narrative Review of Current Concepts and Future Directions
by Kadir Çetinkaya and Yaşar Ünsal
J. Clin. Med. 2026, 15(14), 5700; https://doi.org/10.3390/jcm15145700 - 21 Jul 2026
Viewed by 583
Abstract
The glymphatic system is a recently defined perivascular waste elimination pathway responsible for the efficient clearance of metabolic waste and neurotoxic proteins in the central nervous system. This system facilitates the entry of cerebrospinal fluid (CSF) into the brain parenchyma via arterial perivascular [...] Read more.
The glymphatic system is a recently defined perivascular waste elimination pathway responsible for the efficient clearance of metabolic waste and neurotoxic proteins in the central nervous system. This system facilitates the entry of cerebrospinal fluid (CSF) into the brain parenchyma via arterial perivascular spaces and its interaction with interstitial fluid (ISF) via glial cell-associated aquaporin-4 (AQP4) channels. It functions particularly actively during sleep. Impairment of glymphatic flow contributes to nerve cell damage and neuroinflammation in various pathologies such as Alzheimer’s disease, Parkinson’s disease, traumatic brain injury, subarachnoid hemorrhage, and neurological tumors. In neurosurgical practice, surgical positioning, anesthesia regimen, and intracranial pressure changes play a decisive role in glymphatic function, and perioperative modulation of the system can affect postoperative recovery and cognitive outcomes. Today, non-invasive imaging techniques and molecular biological approaches are deepening our understanding of the functioning of the glymphatic system in humans, and this system is emerging as a potential target in the diagnosis and treatment of neurological diseases. This review comprehensively addresses the basic anatomical and physiological principles of the glymphatic system, its role in pathological processes, and its clinical significance in neurosurgical applications. Full article
(This article belongs to the Special Issue Novel Approaches and Techniques in Neurosurgery)
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41 pages, 1535 KB  
Review
Non-Invasive Diagnosis of Early Breast Cancer: Current and Emerging Liquid Biopsy Biomarkers
by Amalia Kotsifaki, Charikleia-Rafaela Masoura, Georgia Limogianni, Georgia Kalouda, Martha Stathaki and Athanasios Armakolas
Cancers 2026, 18(14), 2344; https://doi.org/10.3390/cancers18142344 - 20 Jul 2026
Viewed by 811
Abstract
Background/Objectives: Breast cancer (BC) remains the most frequently diagnosed malignancy among women worldwide, and patient outcome is strongly influenced by disease stage at diagnosis. Although imaging-based screening has improved early detection, its performance may be reduced in dense breast tissue and is associated [...] Read more.
Background/Objectives: Breast cancer (BC) remains the most frequently diagnosed malignancy among women worldwide, and patient outcome is strongly influenced by disease stage at diagnosis. Although imaging-based screening has improved early detection, its performance may be reduced in dense breast tissue and is associated with false-positive findings. In addition, tissue biopsy is invasive and unsuitable for longitudinal disease monitoring. Liquid biopsy (LB) has emerged as a minimally invasive approach for detecting tumor-derived material in peripheral blood. However, early-stage tumors typically exhibit low tumor burden and limited biomarker shedding, generating weak systemic signals that challenge reliable detection. This review examines current and emerging LB biomarkers for early BC detection. Methods: A comprehensive review of recent literature was conducted focusing on circulating tumor cells (CTCs), circulating tumor DNA (ctDNA), extracellular vesicles (EVs), circulating RNAs, proteins, and other blood-based biomarkers associated with early BC. Studies addressing biomarker biology, detection technologies, clinical applications, and methodological limitations were critically evaluated. Results: ctDNA, CTCs, EVs, circulating RNAs, proteins, and additional blood-based biomarkers capture distinct aspects of tumor biology and disease evolution. ctDNA enables the analysis of tumor-specific mutations, methylation patterns, and fragmentation profiles, whereas CTCs provide direct cellular and phenotypic information despite their rarity and marked epithelial–mesenchymal plasticity. EVs offer increased molecular stability and actively participate in tumor progression, immune modulation, and metastatic niche formation. Nevertheless, low biomarker abundance, biological heterogeneity, technical variability, and background biological noise continue to limit analytical performance, particularly in early-stage disease. Current evidence further suggests that no single biomarker consistently provides sufficient sensitivity and specificity for reliable early BC detection. Conclusions: LB represents a promising strategy for non-invasive early BC detection. Future clinical implementation will likely depend on integrated multi-analyte approaches that combine complementary genomic, transcriptomic, proteomic, and cellular information, supported by multi-omics technologies and artificial intelligence-based analytical frameworks. Full article
(This article belongs to the Special Issue Recent Advances in Liquid Biopsy Biomarkers of Cancer)
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23 pages, 1907 KB  
Review
Integrating Genomic Markers and Non-Invasive Phenotyping for Early Sex Identification in Horticultural Plants: A Mechanism-Guided Framework
by Junzhu Zou, Ke Shi, Haidong Wu, Hao Shen, Yuxiao Qu, Ao Li and Junxiang Liu
Horticulturae 2026, 12(7), 874; https://doi.org/10.3390/horticulturae12070874 - 17 Jul 2026
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Abstract
Early sex identification is essential for the propagation, cultivation, quality improvement, and germplasm management of dioecious horticultural plants and related functionally dioecious systems, particularly in perennial species with long juvenile phases. However, the reliability and transferability of sex-identification technologies depend strongly on the [...] Read more.
Early sex identification is essential for the propagation, cultivation, quality improvement, and germplasm management of dioecious horticultural plants and related functionally dioecious systems, particularly in perennial species with long juvenile phases. However, the reliability and transferability of sex-identification technologies depend strongly on the underlying sex-determining mechanism. Here, we synthesize recent advances in plant sex determination and diagnostic technologies, ranging from morphological and biochemical traits to molecular markers, high-throughput sequencing, structural-variant detection, and emerging non-invasive phenotyping. We propose that sex-identification strategies should be selected according to the biological target generated by each mechanism, including heteromorphic sex chromosomes, homomorphic sex-determining regions (SDRs), functional sex-determining genes, sex chromosome turnover, dosage-dependent systems, and environmentally labile sex expression. We further distinguish genetic, developmental, physiological, and phenotypic layers of plant sex, emphasizing that DNA markers and spectral phenotyping provide complementary information. Genomic markers and non-invasive phenotyping are expected to be consistent when genetic sex is stably expressed, but they may become inconsistent when sex expression is developmentally, hormonally, or environmentally modulated. While molecular markers remain the most reliable tools for confirmatory genotyping, Raman spectroscopy, surface-enhanced Raman scattering (SERS), hyperspectral imaging, and machine learning may serve as rapid prescreening tools in large breeding populations, although their application remains at the proof-of-concept stage. Finally, we present a mechanism-guided decision framework for integrating genomic markers and non-invasive phenotyping to support early sex screening, propagation planning, planting-material optimization, and marker-assisted improvement in dioecious horticultural plants. Full article
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28 pages, 9237 KB  
Article
An Invisible Archive: Multi-Analytical Investigation of Medieval Manuscript Production in Benevento
by Francesco Di Concilio, Annalaura Casanova Municchia, Maria Catrambone, Alessandra Chirivì, Myriam Fiore, Marco Ferretti, Margherita Giugni, Mario Iadanza, Costanza Miliani and Gemma Teresa Colesanti
Heritage 2026, 9(7), 280; https://doi.org/10.3390/heritage9070280 - 16 Jul 2026
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Abstract
The twelfth-century Beneventan manuscripts of the Cathedral Chapter Library of Benevento constitute a largely understudied corpus of medieval illumination, whose material composition has not yet been investigated. This paper presents an in situ non-invasive multi-analytical investigation of three of these codices: Ms. 7 [...] Read more.
The twelfth-century Beneventan manuscripts of the Cathedral Chapter Library of Benevento constitute a largely understudied corpus of medieval illumination, whose material composition has not yet been investigated. This paper presents an in situ non-invasive multi-analytical investigation of three of these codices: Ms. 7 and Ms. 17 (Sanctorale), and Ms. 19 (Missal–Breviary) assigned to two different production environments, through a workflow combining elemental/molecular spectroscopy with point-based and Vis-NIR hyperspectral imaging and high-resolution microscopy. The study examines pigments, binders, and inks, across the three manuscripts, with the aim of establishing an exploratory research protocol that combines autoptic observations and diagnostic analyses to characterising and comparing manuscript production environments. The principal pigments identified across the three manuscripts are cinnabar, natural ultramarine (lapis lazuli), a copper-based green, and lead white, with iron-gall ink consistently present for text writing. Notable differences between the two production environments include the use of orpiment versus an unidentified organic lake for yellow, and the presence of minium, a red–purple lake, and gold exclusively in Ms. 19. A particularly significant finding is the use of iron gall ink, employed across all three manuscripts as a writing medium and as a pigment for modulating tonal values. Moreover, a brown ink was identified in preparatory underdrawings and decorative details, but its composition remains undetermined. Full article
(This article belongs to the Special Issue Deterioration and Conservation of Ancient Writing Supports)
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24 pages, 7409 KB  
Article
CT-Derived Radiomic Signature of MUC6 Expression Improves Guideline-Based Risk Stratification in Intraductal Papillary Mucinous Neoplasms
by Evan W. Davis, Margaret A. Park, Toni L. Basinski, Solomon Alhassan, Maria F. Gomez, Maria Genilo-Delgado, Andrew J. Sinnamon, Pamela J. Hodul, Aleksandra Karolak, Zena Sayegh, Jonathan Nguyen, Brittany Rummens, Jiannong Li, Aakash Tripathi, Nathan H. Parker, Jose M. Pimiento, Ghulam Rasool, Alexandra F. Tassielli, Dung-Tsa Chen, Barbara A. Centeno, Kun Jiang, Daniel Jeong and Jennifer B. Permuthadd Show full author list remove Hide full author list
Cancers 2026, 18(14), 2264; https://doi.org/10.3390/cancers18142264 - 15 Jul 2026
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Abstract
Background and Aims: Accurate pre-operative identification of high-risk intraductal papillary mucinous neoplasms (IPMNs) remains a major clinical challenge, particularly for branch-duct (BD) lesions where guideline-based criteria incompletely capture biologic aggressiveness. We investigated whether tumoral mucin expression identifies high-risk IPMN pathology (i.e., high-grade dysplasia [...] Read more.
Background and Aims: Accurate pre-operative identification of high-risk intraductal papillary mucinous neoplasms (IPMNs) remains a major clinical challenge, particularly for branch-duct (BD) lesions where guideline-based criteria incompletely capture biologic aggressiveness. We investigated whether tumoral mucin expression identifies high-risk IPMN pathology (i.e., high-grade dysplasia or invasive carcinoma) and whether computed tomography (CT)-derived radiomic features can serve as non-invasive biomarkers to enhance pre-operative risk assessment beyond international consensus guidelines (ICG) criteria. Methods: Multiplex immunofluorescence quantified MUC1, MUC2, MUC5AC, and MUC6 expression in tissue microarrays from 101 surgically resected IPMNs classified as low-risk (low-grade dysplasia) or high-risk (high-grade dysplasia or invasive carcinoma). Associations were evaluated using Wilcoxon rank-sum tests, and their discriminatory capability evaluated using receiver operating characteristic curves. For mucins predictive of high-risk pathology, a CT-based ‘radiomic’ signature was developed. Incremental value beyond ICG criteria was evaluated using discrimination metrics and decision curve analysis. Results: Reduced MUC6 expression was significantly associated with high-risk pathology (p = 0.001) and had the highest discriminatory performance (AUC = 0.72). A CT-derived radiomic signature predictive of low MUC6 expression achieved an AUC of 0.75 and, when integrated with ICG high-risk stigmata (HRS), demonstrated improved discrimination and favorable decision-curve characteristics compared with HRS alone, including among BD-IPMNs. Conclusions: Loss of tumoral MUC6 expression is associated with high-risk IPMN pathology and may be approximated using CT-derived radiomic features, supporting the feasibility of non-invasive molecular phenotyping. These findings suggest that integration of molecular and imaging biomarkers with guideline-based criteria may enhance pre-operative IPMN risk stratification; however, prospective external validation in broader surveillance populations and multi-institutional cohorts is warranted prior to clinical implementation. Full article
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