Open research questions in Genetics and Neurodevelopmental Disorders
342 gap statements mined from Genetics and Neurodevelopmental Disorders papers in our 7.9M-paper local library, which holds 1,384 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
There is a need for a more detailed understanding of the developmental trajectories in 15q13.3-deletion cortical organoids. Prior studies have not fully addressed the overlap between these trajectories and RA-related expression programs. The distinctiveness of the gene sets used in these studies is also not well understood.
Exploratory donor-aware analysis of developmental transcriptomic trajectories in 15q13.3-deletion cortical organoids · 2026 · DOIThe need to control for variables such as age, sex, and genetic background in the mouse model.
Altered dendritic morphology of MEC II pyramidal and stellate cells in Rett syndrome mice · 2025 · DOINeurodevelopmental disorders (NDDs) are highly polygenic, yet the functional consequences of most associated non-coding variants remain unclear.
Loss of CDKL5 leads to altered synapse development, excitatory-inhibitory imbalances and glial changes, but the underlying molecular mechanisms remain incompletely understood, particularly at the level of individual brain cell subtypes.
CDKL5 deficiency alters cell subtype-specific molecular programmes and intercellular signalling in the mouse hippocampus · 2026 · DOIAlthough the genetic mechanisms underlying these disorders are well established, the contribution of glucocorticoid signaling pathways and neuroendocrine regulation remains unclear.
Cortisol homeostasis and glucocorticoid signaling are altered in FMR1 full mutation and premutation carriers. · 2026 · DOIBesides severe symptoms such as profound intellectual disability, loss of speech and motor skills and epilepsy, loss of function of MECP2 has been associated with pubertal dysregulation, but the biological mechanisms leading to this remain unclear.
Pubertal development and hypothalamic–pituitary–gonadal axis are altered in male mice lacking Mecp2 · 2026 · DOIDespite an increasing number of reported cases, RLIM‐associated disorders remain underdiagnosed and poorly understood, with no cure or targeted treatments, largely due to limited insight into the cellular and molecular mechanisms underlying their pathogenesis.
RLIM ‐associated neurodevelopmental disorders: From clinical spectrum to molecular mechanisms · 2026 · DOIFinally, we discuss the key open questions that must be addressed to achieve a comprehensive cellular and molecular understanding of RLIM‐associated disorders and thus lay the foundation for future therapeutic interventions.
RLIM ‐associated neurodevelopmental disorders: From clinical spectrum to molecular mechanisms · 2026 · DOITo our knowledge, neurodevelopmental regression has not been documented in confirmed NEDHIB cases, and no standardized therapeutic regimens are established for clinical management.
De novo POLR2A p.(L1127F) variant presenting with neurodevelopmental regression and dystonia, with favorable response to low-dose dopamine therapy: a case report and literature review · 2026 · DOIHowever, comprehensive clinical descriptions of individuals with pathogenic BRSK2 variants remain limited, and the molecular and cellular consequences of these mutations are poorly understood.
Catatonia and regression in an autism spectrum disorder patient harbouring a BRSK2 frameshift mutation · 2025 · DOIFurthermore, this report demonstrates the role of BRSK2 in complex neuropsychiatric features—such as catatonia and cognitive deterioration, which remain underreported in the existing literature—and emphasises the importance of longitudinal cognitive and behavioural monitoring in individuals with BRSK2 mutations.
Catatonia and regression in an autism spectrum disorder patient harbouring a BRSK2 frameshift mutation · 2025 · DOIPrevious studies have focused on the effect of the PURA variant in the cytoplasmic location, but nuclear mislocalisation remains to be explored.
PURA protein mislocalisation in the nucleus: mechanistic basis for transcriptional dysregulation and DNA unwinding deficits in a model of the p.L148Wfs*77 PURA variant · 2025 · DOIDespite recent advances to elucidate GRD pathophysiological mechanisms and to find treatments, to date, GRD therapeutic arms are still scarce and with limited efficacy.
Spermidine Treatment Improves GRIN2B Loss‐Of‐Function, A Primary Disorder of Glutamatergic Neurotransmission · 2025 · DOIHowever, the molecular mechanisms by which early social isolation affects prefrontal PV neurons causing social impairments remain unclear.
Npas4 drives the effects of early social isolation on social behaviors and prefrontal parvalbumin neurons · 2025 · DOIMyelin transcription factor 1 like (MYT1L) is a neuronal transcription factor highly expressed in the developing and adult brain, and, while pathogenic MYT1L mutations cause neurodevelopmental disorders, these have not been characterized in human models of neurodevelopment.
Autism- and intellectual disability-associated MYT1L mutation alters human cortical interneuron differentiation, maturation, and physiology · 2025 · DOIAuditory hypersensitivity is a well-established phenotype of Fragile X syndrome (FXS), but how it relates to neurobehavioral biomarkers remains poorly understood.
Communication has not been systematically examined to guide intervention recommendations.
Expanding the phenotype of Kleefstra syndrome: speech, language and cognition in 103 individuals · 2024 · DOISleep disturbances are also commonly observed in these patients, yet the biological pathways which link sleep traits to the POGZ-associated syndrome remain unclear.
Exploring the molecular pathways linking sleep phenotypes and POGZ-associated neurodevelopmental disorder · 2024 · DOIThe study highlights the need to investigate the impact of early-life stress on FXS-related neuropathology.
Fmr1 Deletion and Early-Life Stress Interact to Increase Cell Proliferation and Glial Populations at the Expense of Immature Neurons in the Adult Dentate Gyrus · 2026 · DOIRett syndrome arises from loss-of-function mutations in the X-linked chromatin regulator MECP2, yet the earliest molecular derailments in development are poorly defined.
Sex-specific predilection in neurological diseases caused by mutations in autosomal genes is a phenomenon whose molecular basis is poorly understood.
The Polycomb Repressive Complex 2 (PRC2) regulates corticogenesis, yet the consequences of mutations to this epigenetic modifier in the mature brain are poorly defined.
Polycomb repressive complex 2 is critical for mouse cortical glutamatergic neuron development · 2024 · DOIFor quick reference, a summary of the major recommendations from this section, stratified by variants and clinical context is provided (box 1). Criteria for genetic testing of RYR1 Suspected clinical diagnosis of malignant hyperthermia.
EMQN Best Practice Guidelines for Genetic Testing and Reporting in RYR1-related disorders · 2026 · DOILeave-one-deletiondonor-out analyses assessed dependence on each affected donor, - mixed-effects models were fitted as sensitivity analyses, - gene-set distinctiveness, not RA specificity, should be evaluated in future…
Exploratory donor-aware analysis of developmental transcriptomic trajectories in 15q13.3-deletion cortical organoids · 2026 · DOIThe study only used a mouse model, - The sample size was limited to 6 mice per group, - The study only examined the MECII…
Altered dendritic morphology of MEC II pyramidal and stellate cells in Rett syndrome mice · 2025 · DOI
Most-cited papers in Genetics and Neurodevelopmental Disorders
- Synaptic, transcriptional and chromatin genes disrupted in autism · Nature · 2014 · 2,651 citations
- The contribution of de novo coding mutations to autism spectrum disorder · Nature · 2014 · 2,457 citations
- From single to multiple deficit models of developmental disorders · Cognition · 2006 · 942 citations
- Advances in the Treatment of Fragile X Syndrome · PEDIATRICS · 2008 · 477 citations
- Bi-ancestral depression GWAS in the Million Veteran Program and meta-analysis in >1.2 million individuals highlight new therapeutic directions · Nature Neuroscience · 2021 · 420 citations
- Generalist Genes and Learning Disabilities. · Psychological Bulletin · 2005 · 389 citations
- Development of prefrontal cortex · Neuropsychopharmacology · 2021 · 385 citations
- The tuberous sclerosis complex · Annals of the New York Academy of Sciences · 2009 · 345 citations
- Human Dysbindin (DTNBP1) Gene Expression inNormal Brain and in Schizophrenic Prefrontal Cortex and Midbrain · Archives of General Psychiatry · 2004 · 301 citations
- Human neural tube defects: Developmental biology, epidemiology, and genetics · Neurotoxicology and Teratology · 2005 · 288 citations
Most recent work
- Modulating alternative splicing of MECP2 is a potential therapeutic strategy for Rett syndrome · Science Translational Medicine · 2026
- Altered Structural Plasticity Mediated by mGlu and NMDA Receptors and Impaired Cognition in a Genetic ASD Model (Shank3 +/− Mice) · Journal of Neuroscience · 2026
- Combined effects of Ret coding and enhancer loss-of-function alleles cause progressive loss of inhibitory motor neurons in the enteric nervous system · bioRxiv · 2026
- Cognitive dysfunction in women with the FMR1 premutation during midlife: The LASSI-L reveals curvilinear CGG-dependent risk buffered by college education · Journal of Alzheimer s Disease · 2026
- miR126-mediated alteration of vascular integrity in Rett syndrome · Molecular Psychiatry · 2026
- DNA methylation signature and clinical delineation of PACS1-related disorder in 24 unreported individuals · European Journal of Human Genetics · 2026
- CSNK2B gene replacement rescues autism-related phenotypes and establishes translational EEG biomarkers · Cell Reports Medicine · 2026
- Bi-allelic variants in neuronal adhesion molecule astrotactin 1 gene ASTN1 cause diverse neurodevelopmental disorders · The American Journal of Human Genetics · 2026
- Recessive loss of DIAPH1 function causes a progressive neurodevelopmental syndrome with variable immunological involvement · Genetics in Medicine · 2026
- The apolipoprotein gene: a modulating role on brain volume and cognitive function in carriers of the fragile X premutation · Neurobiology of Disease · 2026
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