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Immunology and Microbiology · Research topic

Open research questions in Immune Cell Function and Interaction

54 unresolved questions extracted from the limitations and future-work sections of 248 Immune Cell Function and Interaction papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • Previous studies have identified two major NK cell clusters and described their functions based on marker genes, but the mechanisms of transcription factor regulation, developmental maturation, and cellular interactions remain unclear.

    Single-cell transcriptomic analysis reveals the immunosuppressive status of NK cell subpopulations in TNBC · 2026 · DOI

  • We now sought to investigate the dynamics of NK cell populations and immune modulators, like interleukines, not only at the pre-operative stage but also in the postoperative course of disease, as this has not been studied in detail before.

    Distinct NK cell dynamics in SARIFA positive colorectal cancer patients indicate persistent patient-intrinsic immune signatures after tumor resection · 2026 · DOI

  • Abstract Introduction Interleukin-2 (IL-2) promotes Natural killer (NK) cell survival, proliferation, and activation; however its downstream signaling and transcriptional regulators remain incompletely defined.

    IRF8 is a Key Transcriptional Regulator of IL-2—Induced NK Cell Activation and Antitumor activity 2253333 · 2026 · DOI

  • Interferon regulatory factor 8 (IRF8), known for its essential role in dendritic cell and macrophage development, also has not been fully characterized in NK cell—mediated antitumor responses.

    IRF8 is a Key Transcriptional Regulator of IL-2—Induced NK Cell Activation and Antitumor activity 2253333 · 2026 · DOI

  • Abstract Introduction Mucosal immunity in the vaginal tract (VT) remains poorly defined despite its essential role in defense against sexually transmitted infections.

    HSV-2 Infection Induces Lasting Transcriptional and Functional Changes in Vaginal Tissue NK Cells 2258179 · 2026 · DOI

  • Abstract Introduction Autoimmunity is emerging as a new etiology for early-onset gastric cancer (GC), especially in young women, but it remains unclear what molecular pathways drive the initiation and progression of autoimmune tumorigenesis.

    A critical role of epithelial MHCII in initiation of autoimmune tumorigenesis and sustaining premalignancy growth in the stomach 2300319 · 2026 · DOI

  • While methionine restriction (MR) combined with immune checkpoint blockade has been shown to enhance T cell function, the impact of methionine on adoptive T cell therapies remains unknown.

    Methionine Regulates Antitumour Function of <scp>CD8</scp> <sup>+</sup> T Cells Through Polyamine Synthesis · 2026 · DOI

  • HLA-C-restricted CD8+ T-cell responses remain poorly defined compared with HLA-A and HLA-B responses, despite the central role of HLA-C as both a peptide-presenting molecule and a ligand for killer-cell immunoglobulin-like receptors (KIRs).

    KIR Expression Defines a Transcriptionally Distinct CD8+ T-cell Population that Confounds Antigen-Specific T-cell Detection · 2026 · DOI

  • Natural killer (NK) cells, a subset of lymphocytes that react to infections, are the most responsive innate immune cells to exercise, but the mechanisms underlying this are poorly understood.

    Exercise training effects on natural killer cells: a preliminary proteomics and systems biology approach · 2026 · DOI

  • The terminal maturation of NK cells is closely associated with enhanced effector functions, but the role of epigenetic mechanisms in this process remains incompletely understood.

    Targeting EHMT2 enhances NK cell maturation and antitumor activity · 2026 · DOI

  • Natural Killer (NK) cell desensitization induced by persistent stimulation limits durable antitumor immunity, yet the molecular mechanisms governing this dysfunctional state remain poorly defined.

    ITPKB is a conserved regulator of natural killer cell desensitization/education that constrains antitumor immunity · 2026 · DOI

  • Natural killer (NK) cells infiltrate many solid tumours, yet the mechanisms that determine their functional heterogeneity across tumour types remain poorly understood.

    Tumour microenvironments impose translational repression that limits natural killer cell persistence · 2026 · DOI

  • While the anti-tumor effects of vincristine, doxorubicin, and cyclophosphamide are well-documented, their impact on NK cell viability and effector function remains poorly characterized.

    R-CHOP in B cell non-Hodgkin lymphoma: balancing anti-tumor efficacy and NK-cell functionality · 2026 · DOI

  • Folate-dependent purine synthesis, a core pathway sustaining the nucleotide pool, is highly activated in tumors, yet its role in regulating tumor immune sensitivity remains unclear.

    Targeting folate-dependent purine synthesis sensitizes melanoma cells to immune attack through suppressing glycolysis · 2026 · DOI

  • Antibody-dependent cellular cytotoxicity (ADCC) by natural killer (NK) cells is mediated by the activating IgG receptor CD16a (Fc{gamma}RIIIa), yet the molecular mechanisms governing receptor activation remain poorly understood.

    The membrane distal domain of CD16a allosterically regulates NK cell ADCC · 2026 · DOI

  • However, recent studies examining TP53 mutations in cancer immunotherapy have yielded inconsistent results, likely due to differences in t umor m utational b urden (TMB) and the context-dependent roles of specific p53 mutants.

    mTORC1 suppression by Trp53 mutation drives resistance to immune checkpoint blockade · 2026 · DOI

  • We identified I{kappa}B{delta}, encoded by Nfkbid, a poorly characterized I{kappa}B family member, as a molecular lever that overcomes both of these constraints on anti-tumor CD8+ tumor-infiltrating lymphocytes (TILs).

    The atypical IκB factor IκBδ enhances CD8 T cell accumulation and effector functions in solid tumors · 2026 · DOI

  • Abstract The ovary is an immunologically dynamic tissue that coordinates recurrent inflammation-like remodeling while preserving local T cell tolerance, yet whether it actively instructs infiltrating lymphocyte phenotype or passively enriches pre-existing subsets has not been directly tested.

    Ovarian localization drives IL-7R-dependent CD8 coreceptor expression in peripheral double-negative T cells · 2026 · DOI

  • The contribution of other immune cell populations (CD8+ T cells, γδ T cells, ILCs) to the anti-tumor response following GITR-mediated COTL1high NK cell reinvigoration is not comprehensively analyzed; the relative immunological contribution of NK cells versus other lymphocyte subsets requires quantitative assessment through adoptive transfer and immune cell depletion experiments.

    Reinvigorating COTL1high NK cells via GITR signalling overcomes immune checkpoint blockade resistance in tsMHC-I-impaired tumours · 2026 · DOI

  • The optimal dosing regimens, dosing schedules, and combination sequences for GITR agonists with different checkpoint inhibitors (anti-PD-1, anti-CTLA-4, anti-TIM-3) in tsMHC-I-impaired tumors are not systematically evaluated across the murine models and human samples studied.

    Reinvigorating COTL1high NK cells via GITR signalling overcomes immune checkpoint blockade resistance in tsMHC-I-impaired tumours · 2026 · DOI

  • The temporal dynamics of COTL1high NK cell expansion, GITR signaling activation, and checkpoint blockade resistance following GITR agonist treatment are not systematically characterized with longitudinal single-cell transcriptomics or time-resolved kinetic analyses across disease progression.

    Reinvigorating COTL1high NK cells via GITR signalling overcomes immune checkpoint blockade resistance in tsMHC-I-impaired tumours · 2026 · DOI

  • Clinical validation is limited to hepatocellular carcinoma specimens from three Chinese medical centers (JSPH, WXPH, RJH); the applicability of GITR agonist treatment combined with immune checkpoint blockade to MHC-I-impaired tumors in other cancer types (colorectal, pancreatic, melanoma) and ethnically diverse patient populations remains unexplored.

    Reinvigorating COTL1high NK cells via GITR signalling overcomes immune checkpoint blockade resistance in tsMHC-I-impaired tumours · 2026 · DOI

  • The mechanistic role of Zfp683 in regulating COTL1 expression and NK cell differentiation is demonstrated through knockout studies (Zfp683−/− mice), but the direct transcriptional binding mechanisms, epigenetic modifications, and chromatin remodeling events controlling COTL1 promoter activity during NK cell development are not characterized.

    Reinvigorating COTL1high NK cells via GITR signalling overcomes immune checkpoint blockade resistance in tsMHC-I-impaired tumours · 2026 · DOI

  • The study uses only three hepatoma cell lines (H22, Hep-53.4, and Hepa1-6) and two mouse strains (BALB/c and C57BL/6) for in vivo validation; the generalizability of GITR signaling-mediated COTL1high NK cell reinvigoration to other tumor types beyond hepatocellular carcinoma and across diverse genetic backgrounds requires investigation with additional syngeneic tumor models and immunocompetent mouse strains.

    Reinvigorating COTL1high NK cells via GITR signalling overcomes immune checkpoint blockade resistance in tsMHC-I-impaired tumours · 2026 · DOI

  • Established tumors contain phenotypically distinct, tumor-specific natural killer (NK) cells; however, the temporal dynamics, mechanistic underpinning and functional significance of the NK cell compartment remains incompletely understood.

    Rapid functional impairment of natural killer cells following tumor entry limits anti-tumor immunity · 2024 · DOI

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54 open questions have been extracted from the limitations and future-work passages of 248 Immune Cell Function and Interaction papers in our 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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