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Open research questions in Endoplasmic Reticulum Stress and Disease

116 unresolved questions extracted from the limitations and future-work sections of 203 Endoplasmic Reticulum Stress and Disease papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • formal rescue and epistasis studies to resolve the causal relationship between adaptor regulation and the RNF5-depletion phenotype

    RNF5 Regulates HERP1 and OS9 Stability and Modulates Processing of an ERAD Substrate · 2026 · DOI

  • The mechanisms regulating ERAD-associated adaptors remain incompletely defined. It is not known how cells dynamically tune the overall capacity of the ERAD pathway to accommodate varying proteostatic loads. The causal relationship between adaptor regulation and the RNF5-depletion phenotype is not well understood.

    RNF5 Regulates HERP1 and OS9 Stability and Modulates Processing of an ERAD Substrate · 2026 · DOI

  • The role of IRE1α in regulating lipid metabolism during coronavirus infection is not well understood. The mechanisms by which coronaviruses manipulate host cellular processes to facilitate their replication are not fully elucidated. The impact of IRE1α signaling on viral replication is unknown.

    IRE1α Is Associated with Host Lipid Biosynthesis During Human Coronavirus OC43 Infection · 2026 · DOI

  • Notably, ER stress-induced NF-κB activation alone is insufficient to account for robust IL-6 production, thus suggesting the involvement of additional regulators.

    ER stress amplifies inflammation via a dual mechanism involving IκBζ–XBP1s synergism and Regnase-1 degradation · 2026 · DOI

  • Although endoplasmic reticulum (ER) stress is a key modulator of immunity, the mechanisms by which it promotes inflammatory pathology remain incompletely understood.

    ER stress amplifies inflammation via a dual mechanism involving IκBζ–XBP1s synergism and Regnase-1 degradation · 2026 · DOI

  • NCKAP1 has been linked to this process in other tumors, but its role in OSCC remains unknown.

    NCKAP1 Is Essential for SLC7A11-Dependent Disulfide Stress-Induced Cell Death Under Glucose Starvation in an Oral Squamous Cell Model · 2026 · DOI

  • However, the hepatoprotective effect of sinensetin in HIRI pathogenesis have not been fully explored.

    Sinensetin attenuates hepatic ischemia-reperfusion injury through suppressing GRP78/CHOP-mediated endoplasmic reticulum (ER) stress in mice · 2025 · DOI

  • Background: Sorafenib, a widely used tyrosine kinase inhibitor (TKI), has been associated with cardiotoxic effects; however, the precise molecular basis of this toxicity remains incompletely characterized.

    Mechanisms of sorafenib-induced cardiotoxicity: ER stress induces upregulation of ATF3, leading to downregulation of NDUFS1 expression and mitochondrial dysfunction · 2025 · DOI

  • However, the ubiquitination machinery underlying plant ERAD-particularly the ubiquitin-conjugating enzymes (E2s)-and their contributions to stress tolerance remain poorly understood.

    Plant ubiquitin E2 enzymes UBC32, UBC33, and UBC34 are involved in ERAD and function in host stress tolerance · 2025 · DOI

  • However, it remains unclear whether UA modulates innate immunity, and the molecular mechanisms involved have yet to be elucidated.

    Ursolic Acid Activates Mitochondrial Unfolded Protein Response to Enhance Innate Immunity via Transcription Factor ATFS-1/ATF5 · 2025 · DOI

  • However, little is known regarding the role of MANF in alcohol induced neuronal damage in the adult brain.

    Sex-specific effects of alcohol on neurobehavioral performance and endoplasmic reticulum stress: an analysis using neuron-specific MANF deficient mice · 2024 · DOI

  • However, the regulatory mechanisms involving additional cellular circuits remain unclear.

    Inhibition of Endoplasmic Reticulum Stress Cooperates with SLC7A11 to Promote Disulfidptosis and Suppress Tumor Growth upon Glucose Limitation · 2024 · DOI

  • Overall, the results of the study provide information for further investigation of the functional characterization of the CRT genes in tomato.

    Comprehensive genomic characterization and expression analysis of calreticulin gene family in tomato · 2024 · DOI

  • Endoplasmic reticulum (ER) stress has emerged as a significant contributor to the malignant progression of tumors, but its potential regulatory mechanisms in osteosarcoma progression remain unknown.

    Construction of an ER stress-related prognostic signature for predicting prognosis and screening the effective anti-tumor drug in osteosarcoma · 2024 · DOI

  • BACKGROUND: Prior evidence demonstrated that Regulator of G protein Signaling 6 (RGS6) translocates to the nucleolus in response to cytotoxic stress though the functional significance of this phenomenon remains unknown.

    RGS6 drives cardiomyocyte death following nucleolar stress by suppressing Nucleolin/miRNA-21 · 2024 · DOI

  • There is a need to fully understand the role of endoplasmic reticulum stress and the unfolded protein response in spinal cord injury. There is a need to identify potential therapeutic targets for spinal cord injury.

    Endoplasmic reticulum stress-mediated cell death in spinal cord injury: from molecular mechanisms to therapeutic applications · 2026 · DOI

  • The involvement of necroptosis through ER stress in microglia/macrophages after spinal cord injury has been identified, but the upstream triggers linking ER stress sensors (IRE1α, PERK, ATF6) to necroptotic effectors (RIPK1/RIPK3/MLKL) specifically in spinal cord-derived immune cells require mechanistic clarification.

    Endoplasmic reticulum stress-mediated cell death in spinal cord injury: from molecular mechanisms to therapeutic applications · 2026 · DOI

  • Breast-cancer-specific causal evidence remains limited. Outstanding questions remain regarding the impact of ISR modulation on NK effector programs and stress tolerance.

    Overcoming immunotherapy resistance in breast cancer: a novel strategy by targeting the integrated stress response · 2026 · DOI

  • Resolving the critical areas that impede clinical translation of ISR-targeting therapies. Investigating the impact of ISR modulation on NK effector programs and stress tolerance. Examining the potential of biomarker-driven strategies for patient stratification.

    Overcoming immunotherapy resistance in breast cancer: a novel strategy by targeting the integrated stress response · 2026 · DOI

  • The sample size of the scRNA-seq dataset is small (n = 1). There is a lack of healthy control samples in the scRNA-seq dataset. The study is limited by the availability of datasets and the complexity of the analysis.

    Identification of biomarkers associated with endoplasmic reticulum stress-related cell death in osteoporosis based on bulk and single-cell transcriptomic analyses and experimental validation · 2026 · DOI

  • The underlying molecular mechanisms of osteoporosis remain to be fully elucidated. There is a lack of diagnostic biomarkers for osteoporosis. The current therapeutic strategies have limitations.

    Identification of biomarkers associated with endoplasmic reticulum stress-related cell death in osteoporosis based on bulk and single-cell transcriptomic analyses and experimental validation · 2026 · DOI

  • The highly aggressive behavior of GBM. The pronounced heterogeneity of GBM. The lack of understanding of the biological heterogeneity of GBM.

    Machine-learning assisted subclassification of glioblastoma by developing an endoplasmic reticulum stress-related methylation signature · 2026 · DOI

  • There is a need for innovative molecular subtyping approaches for GBM. There is a lack of understanding of the biological heterogeneity of GBM.

    Machine-learning assisted subclassification of glioblastoma by developing an endoplasmic reticulum stress-related methylation signature · 2026 · DOI

  • Collectively, emerging evidence indicates that osteogenic therapeutic strategies targeting ER homeostasis are evolving from single-pathway interventions toward threshold-guided precision modulation frameworks tailored to pathological context and osteogenic stage (Wu et al., 2023). Coordinated modulation of local stress ER microenvironmental osteogenic stages—together with consideration of dose–duration-dependent ER homeostasis features—may provide more translationally feasible therapeutic routes for OP (Song et al., 2024; Martin and Bettencourt, 2018; Cha et al., 2016; Yang et al., 2020). ER-phagy at activity, defined attenuation, conditions regulatory and single interventions, and Nevertheless, several key limitations remain. ER stress signaling and bone metabolic regulation form highly interconnected networks with strong dose- and time-dependent functional outputs. However, current studies still predominantly focus on single-pathway modulation or lack time-point systematic characterization of actionable regulatory windows across pathological contexts and osteogenic differentiation stages, thereby limiting the predictability and controllability of therapeutic outcomes (Hetz and Papa, 2018). Moreover, most current evidence is derived from in vitro systems or acute animal models, which may not fully capture the long-term effects of ER homeostasis modulation on osteogenic outcomes under chronic metabolic dysregulation, aging, or inflammatory conditions (Zhong et al., 2023). To address these challenges, future investigations should prioritize two key directions. First, future studies should focus on the dynamic and systems-level characterization of ER homeostasis threshold properties and stage-dependent regulatory features in osteoblasts across different pathological contexts (Hetz and Papa, 2018; Zhong et al., 2023). Second, integration of single-cell and multi-omics approaches to define cell-type-specific ER homeostasis regulatory mechanisms and the cellular heterogeneity landscape across bone-related cell populations (Li et al., 2024). In this context, translating mechanistic insights into clinical applications represents an important direction for future research. Clinical studies examining the relationship between ER homeostasis and bone metabolism remain limited, with current evidence largely derived from small-sample clinical studies and correlational analyses, although these provide indirect support. For example, in patients with osteoporosis and metabolic bone diseases, elevated levels of ER stress–related markers (e.g., GRP78 and Frontiers in Cell and Developmental Biology 15 frontiersin.org Wang et al. 10.3389/fcell.2026.1809292 therapeutic potential CHOP) and oxidative stress indicators are associated with reduced bone mineral density and imbalanced bone turnover (Zhang P. et al., 2025). In addition, preclinical and translational studies suggest that interventions targeting UPR or protein-folding burden (e.g., in chemical chaperones) may have improving bone mass and microarchitecture (Al-Dagh et al., 2024). However, most existing evidence is based on crosssectional observations or animal-derived translational inferences, and there is a lack of large-scale, longitudinal clinical studies to establish the causal role of ER homeostasis in bone metabolism and its feasibility as a therapeutic target. Therefore, future studies are warranted to integrate clinical cohort analyses with multi-omics the clinical utility of ER approaches homeostasis–related biomarkers in osteoporosis risk assessment and treatment response prediction.

    Stage-dependent endoplasmic reticulum homeostasis in osteogenic differentiation · 2026 · DOI

  • The underlying mechanism of the poor response to glucocorticoids in 5%-10% of asthma patients is unclear. The effect of glucocorticoids on airway epithelial barrier in asthma is not well understood.

    Glucocorticoids injure the airway epithelial barrier via endoplasmic reticulum stress-related apoptosis in asthma · 2026 · DOI

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116 open questions have been extracted from the limitations and future-work passages of 203 Endoplasmic Reticulum Stress and Disease 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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