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Open research questions in Bone Metabolism and Diseases

663 gap statements mined from Bone Metabolism and Diseases papers in our 7.9M-paper local library, which holds 2,652 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • Although the upstream factors controlling Panx3 and P2X4 during osteogenesis remain to be identified, our findings from both cellular and ex vivo models highlight the essential role of the Panx3/P2X4 signaling pathway in osteoblast maturation and bone formation.

    Pannexin 3-mediated adenosine triphosphate release from pre-osteoblasts promotes osteoblast differentiation through P2X4 receptor activation · 2026 · DOI

  • Although streptozotocin (STZ) is widely used to induce experimental diabetes in mice, it has several important limitations. In addition to its dose-dependent β-cell toxicity, STZ is associated with off-target effects, including nephrotoxicity, hepatotoxicity and generalised systemic stress.

    In Vivo Models of Diabetes: Unravelling Molecular Pathways in Metabolic and Skeletal Complications · 2026 · DOI

  • In addition, the current work mainly focused on the immune–bone axis, whereas ABCA8 may also participate in other metabolic or signaling pathways that remain to be elucidated.

    ABCA8 drives bone loss via disrupting Th17/Treg imbalance: a novel immunometabolic target for osteoporosis · 2026 · DOI

  • Although comprehensive pharmacological profiling remains to be established, the current exploratory approach allowed us to demonstrate consistent efficacy in distinct experimental settings, thereby providing a proof-of-concept foundation for subsequent mechanistic and pharmacokinetic studies.

    A novel small molecule KMU-11361 attenuates rheumatoid arthritis by mechanistic inhibition of the TAK1–NF-κB–NLRP3 axis · 2026 · DOI

  • Future work should focus on developing precision-targeted interventions aimed at key metabolic nodes, integrated with advanced delivery systems such as nanocarriers to improve bone-specific targeting and therapeutic efficiency.

    Macrophage Metabolic Reprogramming-Related Osteoimmunity in Osteoporosis · 2026 · DOI

  • As cytokine inhibitors, such as TNF or IL-6R blockers, are increasingly utilized to manage immune-related adverse events (irAEs) in patients receiving ICIs, evaluating the systemic and local consequences of these interventions on bone metastasis will become a critical area of future investigation.

    Cytokine Networks Reprogramming the Osteo–Immune Microenvironment in Cancer Bone Metastasis · 2026 · DOI

  • Our molecular docking data, showing high-affinity binding between capsanthin and UII, provide a plausible structural basis for its inhibitory action, although direct binding assays are warranted for confirmation.

    Capsanthin Attenuates Osteoporosis by Targeting the Urotensin II Receptor Pathway to Inhibit Oxidative Stress and NLRP3 Inflammasome Activation · 2026 · DOI

  • Future studies should consider alternative vehicles or include a DMSO-only control in the Sham group.

    Capsanthin Attenuates Osteoporosis by Targeting the Urotensin II Receptor Pathway to Inhibit Oxidative Stress and NLRP3 Inflammasome Activation · 2026 · DOI

  • In OP, animal and in vitro studies associate increased PAI-1 expression or activity with impaired osteogenesis, osteoblast-lineage senescence, defective repair, and bone loss, although human evidence remains limited and largely associative.

    SERPINE1/PAI-1 in Skeletal Degeneration: A Proposed Context-Dependent Framework for Bone Remodeling Regulation · 2026 · DOI

  • The Cx43/p38 MAPK/Runx2 signaling axis may contribute to normal osteoblast function; whether local surgical-site p38 activation could serve as a prospective strategy to improve postoperative bone healing and surgical prognosis for osteoporotic patients remains to be investigated in further in-vivo experiments.

    The Cx43/p38 MAPK/Runx2 signaling pathway as a potential regulatory axis in insufficient osteogenesis associated with osteoporosis · 2026 · DOI

  • Because ERK1/2 can also regulate AP-1 activity, potential crosstalk and compensatory interactions between ERK1/2 and the p38/JNK branches of MAPK signaling warrant further investigation.

    Formononetin Protects Osteoblasts Against Oxidative Stress and Attenuates Ovariectomy-Induced Bone Loss in Association with MAPK/AP-1 and NRF2 Signaling · 2026 · DOI

  • Whether MALAT1 acts on the RhoA/ROCK pathway and the actin polymerisation machinery in osteoclasts specifically has not been tested, and the connection to osteoclast polarisation, migration and resorption is therefore proposed rather than demonstrated.

    Emerging regulatory role of lncRNA MALAT1 in bone homeostasis: from the β–catenin–OPG/Jagged1 signalling axis to a broader regulatory network · 2026 · DOI

  • While EBV has been linked to periodontitis due to its pro-inflammatory effects and presence in the human periodontium, its effects on bone metabolism, particularly alveolar bone resorption, remain unclear.

    EBV promotes alveolar trabecula resorption via extracellular vesicle remodeling by group IIA secreted phospholipase A2 · 2026 · DOI

  • Nevertheless, the underlying mechanisms by which FAM98A/B regulates osteoclast lysosome trafficking and bone resorption warrant further investigation in the future. Nonetheless, the expression and physiological functions of FAM98A/B/C in bone cells and skeleton modeling/remodeling have not been fully elucidated and remain largely unknown.

    FAM98 Family Proteins Play Distinct Roles in Osteoclastogenesis and Bone Resorption · 2025 · DOI

  • The specific molecular regulatory mechanisms remain unclear. Lactylation may influence the bone resorption function of osteoclasts by regulating the activity of metabolic enzymes within them, which warrants further exploration. Although the specific molecular mechanisms of lactylation in bone metabolism have not been fully elucidated, it is increasingly being recognized as a key node in metabolic regulation.

    Lactylation’s role in bone health and disease: mechanistic insights and therapeutic potential · 2025 · DOI

  • However, a bone cell-specific LDHA knockout model in vivo has not yet been reported, due to the broad role of LDHA in cellular energy metabolism and the risk of disrupting systemic physiological processes (Kwarteng & Agathocleous, 2023).

    Lactylation’s role in bone health and disease: mechanistic insights and therapeutic potential · 2025 · DOI

  • Recent interest has grown in the osteoprotective benefits of their hydrolyzed polypeptides, although the underlying mechanisms have not been fully elucidated.

    Improvement Effect and Regulation Mechanism of Oyster Peptide on Dexamethasone-Induced Osteoporotic Rats · 2025 · DOI

  • IL-8 is known to be produced by both osteoblasts and osteoclasts, but its effect on osteogenesis has not been well studied.

    Proinflammatory Cytokines Enhance the Mineralization, Proliferation, and Metabolic Activity of Primary Human Osteoblast-like Cells · 2024 · DOI

  • It highlights the need for a multi-omics approach to understand the molecular mechanisms driving the disease. The paper also notes the lack of effective diagnostic and therapeutic strategies for osteoporosis.

    From Genomics to Metabolomics: Molecular Insights into Osteoporosis for Enhanced Diagnostic and Therapeutic Approaches · 2024 · DOI

  • Future studies, including in vivo and in vitro experiments, as well as prospective longitudinal studies, are warranted to further elucidate the underlying mechanisms.

    RANKL Inhibition and the Risk of Ocular Hypertension and Primary Open-Angle Glaucoma · 2026 · DOI

  • Decreased estrogen levels are the main contributor to PMOP. Estrogen can influence the course of PMOP through bone metabolism, related important signaling pathways, and immune regulation. This review focuses on the changes in estrogen levels and explores the effects of SIRT and OS on PMOP. When estrogen levels decrease, the activity of SIRTs also decreases.

    New Perspectives on Postmenopausal Osteoporosis: Mechanisms and Potential Therapeutic Strategies of Sirtuins and Oxidative Stress · 2025 · DOI

  • While limited research exists on the effects of lentinan and HBA on these markers, shiitake mushroom extracts have been shown to enhance type I collagen synthesis, ALP activity, and mineralization…

    Therapeutic potential of hydroxybenzoic acid and lentinan in mitigating glucocorticoid-induced osteoporosis: an experimental study · 2026 · DOI

  • Replication in models of polygenic obesity and T2DM with preserved leptin-receptor signaling, such as the ZDSD rat - Future studies should use larger independent cohorts, paired miRNA-mRNA profiling, direct target-validation assays, and gain-and loss-of-function experiments in relevant skeletal cells - Integration with pathway-level measurements, micro-CT, histomorphometry, and biomechanical testing will be required…

    Altered tibial microRNA profiles and local bone remodeling markers in Zucker rat models of obesity and type 2 diabetes · 2026 · DOI

  • This review reports the scientific and clinical evidence for the positive role of nutraceuticals and functional food in bone health, focusing both on in vitro molecular mechanisms, and in vivo animal studies and trials, in order to provide the beneficial effects of some nutraceuticals and functional foods with adequate clinical and experimental evidence useful to improve bone health in real life…

    Nutraceuticals and Functional Foods: A Comprehensive Review of Their Role in Bone Health · 2024 · DOI

  • Further studies on the role of miRNAs in OP, - Investigation of the potential of omics technologies in developing novel biomarkers and therapeutic targets, - Research on the application of scRNA-seq in understanding bone remodeling…

    From Genomics to Metabolomics: Molecular Insights into Osteoporosis for Enhanced Diagnostic and Therapeutic Approaches · 2024 · DOI

Most-cited papers in Bone Metabolism and Diseases

Most recent work

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Open questions raised by papers listed on this page include: (1) Future work should focus on developing precision-targeted interventions aimed at key metabolic nodes, integrated with advanced delivery systems such as nanocarriers to improve bone-specific targeting and therapeutic efficiency (“Macrophage Metabolic Reprogramming-Related Osteoimmunity in Osteoporosis”, 2026); (2) Future studies should consider alternative vehicles or include a DMSO-only control in the Sham group (“Capsanthin Attenuates Osteoporosis by Targeting the Urotensin II Receptor…”, 2026); (3) In OP, animal and in vitro studies associate increased PAI-1 expression or activity with impaired osteogenesis, osteoblast-lineage senescence, defective repair, and bone loss, although human evidence remains limited and largely associative (“SERPINE1/PAI-1 in Skeletal Degeneration: A Proposed Context-Dependent Framework…”, 2026); (4) While EBV has been linked to periodontitis due to its pro-inflammatory effects and presence in the human periodontium, its effects on bone metabolism, particularly alveolar bone resorption, remain unclear (“EBV promotes alveolar trabecula resorption via extracellular vesicle remodeling…”, 2026); (5) Future studies, including in vivo and in vitro experiments, as well as prospective longitudinal studies, are warranted to further elucidate the underlying mechanisms (“RANKL Inhibition and the Risk of Ocular Hypertension and Primary Open-Angle…”, 2026). 663 gap statements have been mined from Bone Metabolism and Diseases papers in our 7.9M-paper local library, which holds 2,652 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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