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Open research questions in Developmental Biology and Gene Regulation

155 unresolved questions extracted from the limitations and future-work sections of 609 Developmental Biology and Gene Regulation papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • real-world acquisition conditions may challenge fixed-step discrete-time models, - morphokinetic assessment remains time-consuming, subjective, and sensitive to inter-operator variability, - public, expert-annotated TLI benchmarks remain scarce

    From time-lapse to morphokinetics: neural ODE dynamics for reliable embryo stage transition timing · 2026 · DOI

  • evaluating clinically meaningful outputs such as transition timing error, - comparing against recent phase/event-oriented methods, - validating the model in a fully online setting

    From time-lapse to morphokinetics: neural ODE dynamics for reliable embryo stage transition timing · 2026 · DOI

  • Investigating conserved mechanisms of stem cell-mediated regeneration, - Enhancing tissue repair in other systems

    Regional signaling controls stem cell-mediated regeneration in an invertebrate chordate · 2026 · DOI

  • How a neuron's developmental origin is read out into a particular selector code remains poorly understood.

    Temporal regulation of a spatial patterning factor in Drosophila neurogenesis · 2026 · DOI

  • Developmental programs can remain conserved despite extensive regulatory divergence, but how evolved regulatory differences are transmitted through embryonic lineages remains unclear.

    Allele-Resolved Hybrid Embryos Reveal the Fates of Regulatory Divergence · 2026 · DOI

  • Stable intercellular bridges that form through incomplete cytokinesis are present in a wide variety of cell types but their function in somatic cell differentiation is not well understood.

    Cytokinesis genes regulate ring canal patterning and follicle cell differentiation in Drosophila · 2026 · DOI

  • Notch signaling and HES/Her transcription factors control neural stem cell (NSC) maintenance and neurogenesis, however the dynamic regulation of neural proliferation zones to sustain growth is not well understood.

    Parameters for stable Notch-independent Her6 oscillations across a frequency spectrum in neural stem cell populations · 2026 · DOI

  • Only germ cells can give rise to a totipotent embryo, yet a conserved transcriptional program for germ cell identity remains elusive.

    Decoupling Transcription from Cell Fate Preserves Germ Cell Totipotency · 2026 · DOI

  • While morphogen gradients pattern tissues, how cells respond to dynamic morphogens remains unclear.

    Rapid transcriptional response to a dynamic morphogen by time integration · 2026 · DOI

  • However, the epigenetic role of HOXA10 and the natural antisense-mediated regulation of HOXA10-AS in oral squamous cell carcinoma progression is not understood.

    Natural Antisense Transcript‐Mediated Regulation of HOXA10 ‐ AS in Oral Squamous Cell Carcinoma · 2025 · DOI

  • The genomes of most gnathostomes contain two paralogs of the shox gene, shox and shox2, both of which are implicated in the development of two key morphological innovations: the jaw apparatus derived from the branchial arches and the paired appendages, whose evolutionary origins remain debated.

    The subfunctionalization of shox and shox2 paralogs in shark highlights both shared and distinct developmental mechanisms of branchial arches and fins · 2025 · DOI

  • However, the molecular mechanisms that enable this phenomenon remain poorly understood.

    Optimized protocols for generating half-sized embryos from separated first two blastomeres in green sea urchin and Xenopus laevis · 2025 · DOI

  • Although Otx2 has been a topic of research for over 3 decades, the role of Otx2 expressed in the brain-forming anterior epiblast during gastrulation has not been clarified.

    The potent neuroepithelium-promoting activity of Otx2 during gastrulation, as demonstrated by its exogenous epiblast-wide expression in chicken embryos · 2025 · DOI

  • The dorsal and anal fins can vary widely in position and length along the anterior–posterior axis in teleost fishes.

    Teleost Hox code defines regional identities competent for the formation of dorsal and anal fins · 2024 · DOI

  • However, the molecular mechanisms underlying the diversification of these fins remain unknown.

    Teleost Hox code defines regional identities competent for the formation of dorsal and anal fins · 2024 · DOI

  • It remains unknown which molecular mechanisms provide cells with the ability to compare fate between neighboring cells.

    A mismatch in the expression of cell surface molecules induces tissue-intrinsic defense against aberrant cells · 2024 · DOI

  • Although conserved signaling pathways govern the clock in most vertebrates, the mechanisms underlying the species-specific divergence in various clock characteristics remain elusive.

    Species-specific roles of the Notch ligands, receptors, and targets orchestrating the signaling landscape of the segmentation clock · 2024 · DOI

  • However, the molecular mechanisms underlying induction of Gdf11 expression remain unclear.

    Functional analysis of a first hindlimb positioning enhancer via Gdf11 expression · 2024 · DOI

  • The paper identifies a gap in our understanding of the signalling pathways that regulate glial morphogenesis. The paper highlights the need for further research on the 'form-function' relationship across development.

    Regulating glial morphogenesis: insights from Drosophila · 2026 · DOI

  • Studies in vertebrate systems have shown that FGFR signaling plays a crucial role in regulating glial morphogenesis (Furusho et al., 2011; Furusho et al., 2012; Meier et al., 2014; Kang et al., 2014). This appears to be the case in Drosophila as well: FGFR/Htl signaling is found to regulate organization, morphology and plasticity in most classes of glia across developmental stages (Shishido et al., 1997; Avet-Rochex et al., 2012; Stork et al., 2014; Ayoub et al., 2023). On the other hand, little is known of how G-protein signaling pathways regulate glial morphology. Much of our understanding comes from studies on Moody which is limited to SPGs. However, studies on Loco, Fog and Tre-1 (Granderath et al., 1999; Schwabe et al., 2005; Ratnaparkhi and Zinn, 2007; Shweta et al., 2021; Chen et al., 2024; Katagade et al., 2024) indicate that GPCR signaling is likely to have a broader role in regulating glial morphogenesis which needs to be explored further. In this context, the interaction between Fog and FGFR/Htl in regulating glial organization (Shweta et al., 2021) is significant especially given the conserved role of FGFR in glial morphogenesis. It would be interesting to determine if the interaction between the two pathways (GPCR and FGFR/Htl) is conserved and hierarchical in other glia as well.

    Regulating glial morphogenesis: insights from Drosophila · 2026 · DOI

  • The exact mechanisms of the fin-to-limb transition are not fully understood. The genetic mechanisms of spatial limb bud development and the possible modifications of these mechanisms associated with the transformation of ancestral fins into pentadactyl terrestrial limbs require further study.

    Evolutionary pathway and genetic mechanisms of fin-to-limb transition in vertebrates · 2026 · DOI

  • Integration of paleontological fossil data (from Panderichthys, Tiktaalik, and Elpistostege) with molecular-level mechanistic studies of appendage development in living sarcopterygians requires explicit functional validation of how specific morphological features observed in fossils (partial dermal fin ray reduction, dorso-ventral specification) relate to underlying genetic regulatory changes.

    Evolutionary pathway and genetic mechanisms of fin-to-limb transition in vertebrates · 2026 · DOI

  • Future studies could investigate the molecular mechanisms underlying the role of cell division in neural plate formation and anterior-posterior patterning. Further research could explore the implications of this study's findings for understanding the mechanisms of brain malformations.

    Cell division during Xenopus gastrulation influences neuroectoderm patterning · 2026 · DOI

  • The mechanisms by which Adam13 regulates histone modification and gene expression are not well understood. The role of Adam13 in regulating alternative splicing in the CNC is not well understood.

    Adam13 interacts with large protein complexes to regulate histone modification and gene expression · 2026 · DOI

  • Further investigation of the molecular mechanisms underlying the reorganization of the apical surface. Investigation of the role of E-cadherin in other systems and diseases. Development of novel therapies and biomaterials based on the discovery of a novel mechanism for establishing adhesion between epithelial and non-epithelial cell types.

    Reorganization of E-cadherin into apical spot junctions mediates interlineage adhesion between epithelial and germline cells · 2026 · DOI

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155 open questions have been extracted from the limitations and future-work passages of 609 Developmental Biology and Gene Regulation 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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