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Open research questions in Barrier Structure and Function Studies

115 unresolved questions extracted from the limitations and future-work sections of 301 Barrier Structure and Function Studies papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • The complexity of the neurovascular-immune pathology in DPN. The need for a better understanding of the mechanisms underlying BNB dysfunction. The challenge of developing effective disease-modifying therapies for DPN.

    Redox-Driven Blood–Nerve Barrier Dysfunction in Diabetic Peripheral Neuropathy: Mechanisms and Therapeutic Opportunities · 2026 · DOI

  • Current therapies remain largely symptomatic and do not provide robust disease-modifying effects - Direct evidence for semaglutide-mediated protection of the human BNB remains limited

    Redox-Driven Blood–Nerve Barrier Dysfunction in Diabetic Peripheral Neuropathy: Mechanisms and Therapeutic Opportunities · 2026 · DOI

  • The complexity of the intestinal mucosal barrier microenvironment. The need to understand the mechanisms by which palmitoylation regulates the barrier. The challenge of translating preclinical findings to clinical applications.

    Palmitoylation reprograms the intestinal mucosal barrier microenvironment: potential mechanisms and promising therapeutic targets · 2026 · DOI

  • The lack of understanding of the mechanisms by which palmitoylation regulates the intestinal mucosal barrier microenvironment. The need for therapeutic strategies to target the palmitoylation cycle in inflammatory bowel diseases. The limited knowledge of the role of the gut microbiota in modulating S-palmitoylation of host proteins.

    Palmitoylation reprograms the intestinal mucosal barrier microenvironment: potential mechanisms and promising therapeutic targets · 2026 · DOI

  • direct per-tissue infiltration scoring against local S100B remains scarce, - serial gut-portal measurements are lacking, - in vivo validation is required for the potential host restriction mechanism of S100B in viral hepatitis

    S100B in brain–gut–liver crosstalk: from glial activation to multiorgan inflammation · 2026 · DOI

  • generating direct per-tissue infiltration scoring against local S100B in prospective cohorts with spatial validation, - investigating the role of S100B in viral hepatitis, - exploring the potential of S100B as a biomarker for multi-organ disease

    S100B in brain–gut–liver crosstalk: from glial activation to multiorgan inflammation · 2026 · DOI

  • Further studies are needed to investigate the mechanisms of intestinal barrier dysfunction in CKD patients. Research on the effects of CKD on the gut microbiome and its relation to systemic inflammation is needed. Studies on the potential therapeutic targets for reducing gut permeability and systemic inflammation in CKD patients should be conducted.

    Altered Expression of Intestinal Tight Junctions in Patients with Chronic Kidney Disease: A Pathogenetic Mechanism of Intestinal Hyperpermeability · 2024 · DOI

  • The mechanisms of intestinal barrier dysfunction and increased gut permeability in CKD patients are not yet fully understood. The role of tight junction proteins in the pathogenesis of intestinal hyperpermeability in CKD patients is not fully elucidated.

    Altered Expression of Intestinal Tight Junctions in Patients with Chronic Kidney Disease: A Pathogenetic Mechanism of Intestinal Hyperpermeability · 2024 · DOI

  • While intestinal organoids have emerged as a promising tool for modeling GI physiology and disease, equine-specific data remain limited.

    Functional and molecular characterization of equine intestinal organoids across media conditions and intestinal segments · 2026 · DOI

  • Ras-related protein Rab-3B (RAB3B), a key regulator of vesicle trafficking, may influence barrier homeostasis; however, its role in PROM remains unclear.

    RAB3B regulates vesicle uptake and tight junction integrity in amniotic epithelial cells and is downregulated in premature rupture of membranes · 2026 · DOI

  • While candidalysin is a pore-forming cytolytic peptide encoded within ECE1 (extent of cell elongation 1 gene), its relationship to the abundance and organization of specific intestinal tight-junction proteins during dissemination remains incompletely defined.

    Tight junction suppression by candidalysin promotes gut-to-blood dissemination of Candida albicans · 2026 · DOI

  • However, the expression of JUP in acute myocardial infarction (AMI) and its potential applications in prognostic evaluation of patients remain underexplored.

    Bioinformatics analysis of JUP in patients with acute myocardial infarction and its potential application in clinical prognostic evaluation · 2025 · DOI

  • The tight junction protein claudin-1, known to influence cellular functions in various cancers and is considered a therapeutic target, remains unclear in pancreatic cancer.

    The Role of Claudin-1 in Enhancing Pancreatic Cancer Aggressiveness and Drug Resistance via Metabolic Pathway Modulation · 2025 · DOI

  • Tryptophan (Trp), an essential amino acid, has been implicated in regulating metabolic and neurological pathways, but its role in mitigating HFD-induced cognitive dysfunction remains insufficiently explored.

    Tryptophan-Rich Diet Improves High-Fat Diet-Induced Cognitive Dysfunction and Blood–Brain Barrier Disruption in C57BL/6 Mice through FFAR3 Activation · 2025 · DOI

  • However, the importance of pericyte antigen-restricted engagement by CD8 T cells is not fully understood.

    MHC Class I deletion on pericytes alters lymphocyte infiltration during Theiler’s murine encephalomyelitis virus 2198 · 2025 · DOI

  • However, the specific role of the brain barrier in linking periodontitis to cognitive function remains unclear.

    Porphyromonas gingivalis-induced periodontitis promotes neuroinflammation and neuronal loss associated with dysfunction of the brain barrier · 2025 · DOI

  • Breast cancer brain metastasis (BCBM) poses a significant clinical challenge, with endothelial barrier dysfunction representing a critical yet poorly understood step in metastatic progression.

    Tumor exosomal miR-221-3p induces glycolysis through the LIFR/GLUT1 pathway to destroy the cerebral vascular endothelial cell barrier and promote breast cancer brain metastasis · 2025 · DOI

  • Keratin 1 (KRT1) is crucial in regulating these alterations, but its specific role in the progression of UC remains to be fully elucidated.

    Keratin 1 modulates intestinal barrier and immune response via kallikrein kinin system in ulcerative colitis · 2025 · DOI

  • However, the mechanisms underlying the restoration of BBB in the chronic stage after stroke remain unclear.

    The myeloid cell-driven transdifferentiation of endothelial cells into pericytes promotes the restoration of BBB function and brain self-repair after stroke · 2025 · DOI

  • Background The evolution and severity of blood–brain barrier (BBB) permeability in the core and penumbra over time in acute ischemic stroke remain poorly understood.

    Blood–Brain Barrier Permeability Dynamics and Mediation of Triglyceride–Glucose Index on Acute Ischemic Stroke Outcomes · 2025 · DOI

  • Nevertheless, as a pivotal molecule in renal calcium excretion, its pathway that contributes to stone formation by regulating calcium supersaturation remains underexplored.

    Calcium sensing receptor regulate claudin-14 via PKA-STAT3 pathway in rat model of nephrolithiasis · 2024 · DOI

  • Nevertheless, the precise molecular mechanisms underpinning HD's ameliorative effects on intestinal epithelial barrier dysfunction remain elusive.

    p-hydroxy benzaldehyde attenuates intestinal epithelial barrier dysfunction caused by colitis via activating the HNF-1β/SLC26A3 pathway · 2024 · DOI

  • However, the mechanisms by which BA protects the intestinal mucosal barrier remain to be elucidated.

    Butyric acid alleviates LPS-induced intestinal mucosal barrier damage by inhibiting the RhoA/ROCK2/MLCK signaling pathway in Caco2 cells · 2024 · DOI

  • Actin filaments undergo a constant turnover guided by numerous actin-binding proteins, however, the roles of actin filament dynamics in regulating intestinal epithelial barrier integrity and repair remain poorly understood.

    Coactosin-like protein 1 regulates integrity and repair of model intestinal epithelial barriers via actin binding dependent and independent mechanisms · 2024 · DOI

  • COTL1 is essential for neuronal and cancer cell migration, however, its functions in epithelia remain unknown.

    Coactosin-like protein 1 regulates integrity and repair of model intestinal epithelial barriers via actin binding dependent and independent mechanisms · 2024 · DOI

Most-cited papers in Barrier Structure and Function Studies

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115 open questions have been extracted from the limitations and future-work passages of 301 Barrier Structure and Function Studies papers in our 4.5M-paper local library. Each one below links back to the study that raised it, so you can read the original claim in context.

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