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Open research questions in Cell death mechanisms and regulation

126 gap statements mined from Cell death mechanisms and regulation papers in our 4.5M-paper local library, which holds 820 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

  • The lack of understanding of how the replacement of the RHIM in vIRA with RHIMs from other proteins affects its ability to prevent necroptosis. The need to determine the functionality of RHIM-swap M45 proteins in the context of MCMV infection. The gap in knowledge about the specific amyloid fibril structures driven by unique amino-acid sequences and their influence on RHIM-based signaling.

    vIRA Inhibition of Antiviral Necroptosis and RIPK3 Binding Are Separable Events · 2026 · DOI

  • The reliability of the molecular docking protocol was a challenge that needed to be addressed. The study also faced the challenge of evaluating the drug-likeness and pharmacokinetic behavior of the identified compounds.

    Expanding the chemical space of Bcl-2 inhibitors: a multiscale computational exploration of the benzopyran (chromene) scaffold · 2026 · DOI

  • However, the contribution of additional cellular components to apoptotic pore dynamics remains poorly understood.

    MTCH2 promotes BAX and BAK self-assembly and apoptotic pore growth · 2026 · DOI

  • There is an unmet need in the treatment of triple-negative breast cancer (TNBC), as recurrence rates remain high; thus, novel treatment strategies are warranted to improve outcomes for patients.

    The Smac mimetic drug Xevinapant sensitizes triple negative breast cancer to radiotherapy-induced cell death in a TNFα dependent manner · 2026 · DOI

  • Current literature lacks data on caspases in the kidneys of cattle of different age groups.

    Morphological changes and expression of caspases in cattle kidneys in age-related maner · 2026 · DOI

  • However, the utility of existing RIPK1 PET radiotracers, as well as various RIPK1 inhibitors, remains uncertain, as it is unclear whether they reflect total protein abundance or phosphorylation-dependent activation (pRIPK1), limiting accurate assessment of in vivo signaling.

    PET Imaging of Phosphorylated RIPK1 Reveals Necroptosis Activation In Vivo · 2026 · DOI

  • However, the cell type-specific role of necroptosis in liver aging remains unclear.

    A Non‐Canonical Role for Hepatocyte MLKL in Promoting Mitochondrial Dysfunction and Senescence in the Aging Liver · 2026 · DOI

  • Additionally, the high-order supramolecular assembly of the necrosome and its transition between different states remain poorly understood, particularly regarding how RIPK3 and MLKL configurations impact necrosome activity and stability.

    Spotted: RIPK3 and MLKL assembling necroptotic complexes · 2026 · DOI

  • Despite progress in our understanding of necroptotic signalling, key open questions remain.

    Spotted: RIPK3 and MLKL assembling necroptotic complexes · 2026 · DOI

  • Despite being discovered more than 20 years ago, tissue-specific apoptosis induction, as well as endogenous expression pattern and dynamic subcellular localization of apoptosis proteins, remain incompletely defined.

    Endogenous expression and subcellular localization of core apoptosis regulators reveal key differences between embryonic and germline apoptosis in C. elegans · 2026 · DOI

  • Receptor-interacting protein kinase 1 (RIPK1) is a key stress sensor regulating cell death, inflammation, and tumorigenesis, yet how RIPK1 becomes activated remains unclear.

    Species-specific regulation of necroptosis by STK38-dependent RIPK1 phosphorylation · 2026 · DOI

  • The structure and function of this complex in nonapoptotic cell death regulation remain poorly understood.

    Functional dissection of the zDHHC palmitoyltransferase 5–golgin A7 palmitoylation complex · 2025 · DOI

  • Despite its significance, the specific functions and mechanisms of PANoptosis within the tumor microenvironment (TME) of hepatocellular carcinoma (HCC) remain unclear.

    Investigating the molecular mechanisms and clinical potential of APO+ endothelial cells associated with PANoptosis in the tumor microenvironment of hepatocellular carcinoma using single-cell sequencing data · 2025 · DOI

  • However, the molecular and cellular mechanisms driving cardiomyocyte damage by immune cells remain poorly understood.

    MLKL–Mediated Necroptosis Predominantly Contributes to Immune-Associated Myocardial Damage · 2025 · DOI

  • Future research will focus on elucidating context-dependent PANoptosome regulation and translating these insights into precision oncology strategies.

    PANoptosis in cancer: bridging molecular mechanisms to therapeutic innovations · 2025 · DOI

  • Bcl-2 modifying factor (Bmf) is an understudied BH3-only protein of this family that is widely expressed in many normal and cancer tissues.

    Bcl-2 modifying factor (Bmf): “a mysterious stranger” in the Bcl-2 family proteins · 2025 · DOI

  • However, the comprehensive involvement of all eight BH3-only proteins in Bak/Bax-dependent hepatocyte apoptosis remains unclear.

    Collaborative orchestration of BH3-only proteins governs Bak/Bax-dependent hepatocyte apoptosis under antiapoptotic protein-deficiency in mice · 2025 · DOI

  • Regulated cell death is integral to sculpting the developing brain, yet the relative contributions of extrinsic apoptosis and necroptosis remain unclear.

    Extrinsic apoptosis and necroptosis in telencephalic development: a single-cell mass cytometry study · 2025 · DOI

  • Further preclinical studies are warranted to validate their therapeutic efficacy and safety.

    Cephalochromin Effects in Triple-Negative Breast Cancer Cells: Apoptosis Induction and Modulation of Survival Pathways · 2025 · DOI

  • Cephalochromin, a fungal-derived bioactive compound, has demonstrated cytotoxic activity in various cancer models; however, its effects on breast cancer remain unexplored.

    Cephalochromin Effects in Triple-Negative Breast Cancer Cells: Apoptosis Induction and Modulation of Survival Pathways · 2025 · DOI

  • However, the understanding of pyroptosis and necroptosis pathways in granulosa cells during follicular atresia remains unclear.

    The assembly and activation of the PANoptosome promote porcine granulosa cell programmed cell death during follicular atresia · 2024 · DOI

  • RIPK2 is emerging as a significant but underrecognized modulator of sterile cardiac inflammation and pathological remodeling.

    Receptor-interacting protein kinases (RIPK1–RIPK4) in cardiac pathophysiology: Mechanistic signaling, disease contexts, and emerging pharmacological targets · 2026 · DOI

  • While mitochondrial carriers (MCs) play crucial roles in tumor metabolism, their specific contributions to HCC pathogenesis are poorly understood.

    SLC25A39 identified as a key regulator of hepatocellular carcinoma progression through the mitochondrial ROS–cytochrome c–caspase signaling axis · 2025 · DOI

  • Determine the exact differences between RHIMs that cause drastically different outcomes - Determine the minimal RHIM required for RIPK3…

    vIRA Inhibition of Antiviral Necroptosis and RIPK3 Binding Are Separable Events · 2026 · DOI

  • Investigating the effects of MLKL translocation inhibition on Meth-induced neurotoxicity, - Exploring the therapeutic potential of targeting the RIPK1-RIPK3 axis for Meth-induced neuronal…

    Methamphetamine Exposure Induces Neuronal Programmed Necrosis by Permeabilizing Mitochondria via the RIPK1–RIPK3–MLKL Axis · 2025 · DOI

Most-cited papers in Cell death mechanisms and regulation

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Open questions raised by papers listed on this page include: (1) The lack of understanding of how the replacement of the RHIM in vIRA with RHIMs from other proteins affects its ability to prevent necroptosis (“vIRA Inhibition of Antiviral Necroptosis and RIPK3 Binding Are Separable Events”, 2026); (2) The contribution of additional cellular components to apoptotic pore dynamics remains poorly understood (“MTCH2 promotes BAX and BAK self-assembly and apoptotic pore growth”, 2026); (3) There is an unmet need in the treatment of triple-negative breast cancer (TNBC), as recurrence rates remain high; thus, novel treatment strategies are warranted to improve outcomes for patients (“The Smac mimetic drug Xevinapant sensitizes triple negative breast cancer to…”, 2026); (4) The cell type-specific role of necroptosis in liver aging remains unclear (“A Non‐Canonical Role for Hepatocyte MLKL in Promoting Mitochondrial Dysfunction…”, 2026); (5) The high-order supramolecular assembly of the necrosome and its transition between different states remain poorly understood, particularly regarding how RIPK3 and MLKL configurations impact necrosome activity and stability (“Spotted: RIPK3 and MLKL assembling necroptotic complexes”, 2026). 126 gap statements have been mined from Cell death mechanisms and regulation papers in our 4.5M-paper local library, which holds 820 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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