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Open research questions in Sphingolipid Metabolism and Signaling

117 gap statements mined from Sphingolipid Metabolism and Signaling papers in our 4.5M-paper local library, which holds 415 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

  • In preclinical models, LipC6 induces tumor cell apoptosis, reduces immuno- suppression, and enhances CD8 + T cell activity, but its clinical efficacy remains to be determined [28].

    Targeting cell membrane sphingolipids: a novel ceramide analog CeY-B1 inhibits migration and invasion in cervical cancer cells · 2026 · DOI

  • Thus, the zebrafish findings support an in vivo role of TMEM56 in cell migration and suggest a potential role during embryonic development, while warranting further investigation.

    TRAM-LAG1-CLN8 domain-containing protein TMEM56 regulates cell migration by changing intracellular ceramide levels · 2026 · DOI

  • Third, the receptor repertoire for LysoPE remains incompletely characterized, with evidence supporting LPAR1, GPR119, and potentially other unidentified GPCRs depending on cell type. 1852277 Limitations of the current literature include small sample sizes in clinical studies, heterogeneity in LysoPE species analyzed, lack of standardized detection methods, and the predominance of descriptive lipidomics without mechanistic follow-up.

    Lysophosphatidylethanolamine (LysoPE) in health and disease: a narrative review of its pathophysiological mechanisms and translational potential as a biomarker · 2026 · DOI

  • Myeloablative therapy causes the microenvironment death of HSCs or leukemia cells, which release various soluble cytokines and debris into the BM cavity; however, the contribution of these cytokines and debris to BM repair has not been investigated.

    Efferocytosis enhances macrophage pro-angiogenic functions for bone marrow regeneration · 2026 · DOI

  • From a translational perspective, these findings sug- gest that low-dose fingolimod may represent a potentially more favorable dose range in this experimental model of cognitive impairment; however, whether this observation translates to human neurodegenerative diseases remains to be determined.

    Dose-dependent effects of fingolimod on behavioral, molecular, and Stereological outcomes in a rat model of intracerebroventricular streptozotocin-induced Alzheimer’s disease-like cognitive dysfunction · 2026 · DOI

  • Although the pre- cise mechanism remains unclear, excessive modulation of S1P receptors at higher doses may alter locomotor activ- ity, behavioral responsiveness, or general physiological sta- tus, thereby compromising performance during behavioral assessments. This highlights an important limitation in pharmacologi- cal studies: side effects at higher doses may hinder proper behavioral assessment and compromise the interpretability of results.

    Dose-dependent effects of fingolimod on behavioral, molecular, and Stereological outcomes in a rat model of intracerebroventricular streptozotocin-induced Alzheimer’s disease-like cognitive dysfunction · 2026 · DOI

  • These findings extend the postmarketing characterization of ocular reporting across all five approved S1P receptor modulators, while sparse data for newer agents and residual confounding limit comparative interpretation.

    Ocular safety signals of sphingosine-1-phosphate receptor modulators in postmarketing surveillance · 2026 · DOI

  • However, the underlying mechanism of driving metastasis remains poorly understood.

    Sphingosine‐1‐Phosphate Receptor 3 Confers Tumor Metastasis in Lung Cancer Resistant to Third‐Generation EGFR Inhibitor · 2026 · DOI

  • Very-long-chain (VLC) ceramide synthases are essential for plant growth and development, but how VLC ceramide synthases affect developmental programs and their exact roles in plant growth remain unclear.

    Very‐long‐chain ceramide synthases and PIF4‐mediated auxin signaling act together to modulate thermomorphogenesis in Arabidopsis · 2026 · DOI

  • The metabolic flux between these two lipids is a vital component of the cellular stress response, yet the underlying regulatory mechanisms in cancer remain elusive.

    Dysregulated sphingolipid metabolismdrives pancreatic carcinogenesis through plasma membrane Kras enrichment · 2026 · DOI

  • Although wingless-related integration site signaling-based protocols have enabled cardiomyocyte (CM) differentiation from pluripotent stem cells, issues such as low efficiency, immature phenotype, and variability across cell lines remain to be resolved.

    Sphingosine-1-phosphate receptor 1 signaling stimulates human pluripotent stem cell-derived cardiomyocyte differentiation and maturation · 2026 · DOI

  • Although sphingolipid metabolic reprogramming is known to influence TME remodeling, systematic GC subtyping based on sphingolipid metabolism-related genes (SMGs) and the spatial regulatory roles of key metabolic enzymes remain insufficiently characterized.

    Sphingolipid metabolic subtyping defines SPHK1 as an oncogene and characterizes immunosuppressive TME features in gastric cancer · 2026 · DOI

  • However, the functional role of this miRNA cluster in NSCLC has not been fully elucidated.

    The miR105/767 cluster as a coordinator of apoptosis and PD-L1 expression in non-small cell lung cancer · 2026 · DOI

  • Although PA's direct effects on cancer cells are well described, its impact on CD8 T cells [cytotoxic T lymphocytes (CTLs)] remains unclear.

    Palmitate-induced mitochondrial damage restricts histone acetylation in CD8 T cells to impair antitumor immunity · 2026 · DOI

  • However, the organ-specific modulation of lysolecithin remodeling in type 2 diabetes mellitus (T2DM) and its functional consequences remain poorly explored.

    LPCAT1 Mediates Lysolecithin Dysregulation in Type 2 Diabetes, Contributing to Endothelial Dysfunction and Impaired Glucose Homeostasis · 2026 · DOI

  • However, whether the S1P signaling pathway is a target for sepsis treatment remains unknown.

    Persistent Activation of Sphingosine‐1‐Phosphate Receptor 1 by Phytosphingosine‐3,4‐Cyclic Phosphate Ameliorates Sepsis by Inhibiting Hyperinflammation and Vascular Hyperpermeability · 2025 · DOI

  • However, the intricate interplay between cholesterol efflux and capacitation-associated modifications in human spermatozoa remains poorly understood.

    Dysregulation of sphingolipid and cholesterol homeostasis imposes oxidative stress in human spermatozoa · 2025 · DOI

  • However, the mechanisms underlying the regulation of S1P biosynthetic pathways in arteries remain to be further clarified.

    Reticulon 3 regulates sphingosine‐1‐phosphate synthesis in endothelial cells to control blood pressure · 2024 · DOI

  • However, the molecular mechanisms regulating different types of cell death are poorly understood.

    A sphingolipid rheostat controls apoptosis versus apical cell extrusion as alternative tumour-suppressive mechanisms · 2024 · DOI

  • However, the mechanism underlying liver injury is complex and not completely understood.

    Ceramide kinase-mediated C1P metabolism attenuates acute liver injury by inhibiting the interaction between KEAP1 and NRF2 · 2024 · DOI

  • Moreover, cation amphiphilic drugs (CADs) are known as ASM inhibitors and have anti-cancer activity, but the structural mechanisms of their interactions with the lysosomal membrane and ASM are poorly explored.

    Acidic sphingomyelinase interactions with lysosomal membranes and cation amphiphilic drugs: A molecular dynamics investigation · 2024 · DOI

  • However, the expression pattern and function of GPR65 in osteosarcoma (OS) remain unclear.

    What role does GPR65 play in the progression of osteosarcoma? Its mechanism and clinical significance · 2024 · DOI

  • This work elucidates mechanistic differences between these critical lipids and sets the foundation for further studies of the cellular functions of sphingosine and sphinganine.

    Trifunctional Sphinganine: A New Tool to Dissect Sphingolipid Function · 2024 · DOI

  • Functions and cell biology of the sphingolipids sphingosine and sphinganine in cells are not well understood.

    Trifunctional Sphinganine: A New Tool to Dissect Sphingolipid Function · 2024 · DOI

  • The role of LPA receptor signaling in pancreatic cancer cells under hypoxic conditions is not well understood. The study aims to investigate the effects of LPA on cell proliferation and invasion in pancreatic cancer cells.

    Enhancement of malignant potency through lysophosphatidic acid (LPA) receptor signaling in pancreatic cancer cells under hypoxic conditions · 2026 · DOI

Most-cited papers in Sphingolipid Metabolism and Signaling

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117 gap statements have been mined from Sphingolipid Metabolism and Signaling papers in our 4.5M-paper local library, which holds 415 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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