Epigenetic syndromes

Chromatinopathies lend themselves well to preclinical research because we can look at the effects of the genetic defect at different levels (translational research). A genetic defect often results in an imbalance in neurobiological processes and teaches us more about the mechanisms underlying these complex disorders. But also about the connection with e.g. metabolism, immunological and gastrointestinal disorders.

In a national consortium, we conduct preclinical research into chromatinopathies in addition to clinical research.

New techniques make it possible to process skin or blood cells of patients into stem cells, which can then grow into, for example, a nerve cell or even a so-called brain organoid that mimics the structure and function of certain brain areas in miniature. With these techniques, we can, for example, test medicines or investigate the precise function of a certain cell, a gene or an underlying mechanism. This research often takes years, but is important in order to gain more insight into the biological mechanisms underlying these conditions in the long term and can ultimately contribute to the development of new therapies.

Here you can read more about such a preclinical study, in which the cause of the sex difference is investigated in the rare SETD1B syndrome, using brain organoids.

Draksler et al. (2024) Exploring Kleefstra syndrome cohort phenotyp characteristics: Prevalence insights from caregiver-reported outcomes Eur J Med Genet. Pubmed

Rots et al. (2024) Pathogenic variants in KMT2C result in a neurodevelopmental disorder distinct from Kleefstra and Kabuki syndromes Am J Hum Genet. Pubmed

Rots et al. (2024) Comprehensive EHMT1 variants analysis broadens genotype-phenotype associations and molecular mechanisms in Kleefstra syndrome Am J Hum Genet. Pubmed

Rots et al. (2024) Refining the 9q34.3 microduplication syndrome reveals mild neurodevelopmental features associated with a distinct global DNA methylation profile Clin Genet. Pubmed

Morison et al. (2024) Expanding the phenotype of Kleefstra syndrome: speech, language and cognition in 103 individuals J Med Genet. Pubmed

Bouman et al. (2024) Growth, body composition, and endocrine-metabolic profiles of individuals with Kleefstra syndrome provide directions for clinical management and translational studies Am J Med Genet A. Pubmed

Rots et al. (2023) The clinical and molecular spectrum of the KDM6B-related neurodevelopmental disorder Am J Hum Genet. Pubmed

Wang et al. (2022) Loss-of-function variants in the schizophrenia risk gene SETD1A alter neuronal network activity in human neurons through the cAMP/PKA pathway Cell Rep. Pubmed

Weerts et al. (2021) Delineating the molecular and phenotypic spectrum of the SETD1B-related syndrome Genet Med Pubmed

Wang et al. (2021) SETD1A Mediated H3K4 Methylation and Its Role in Neurodevelopmental and Neuropsychiatric Disorders Front Mol Neurosci. Pubmed

Kummeling et al. (2021) Characterization of SETD1A haploinsufficiency in humans and Drosophila defines a novel neurodevelopmental syndrome Mol Psychiatry. Pubmed

Barish et al. (2021) BICRA, a SWI/SNF Complex Member, Is Associated with BAF-Disorder Related Phenotypes in Humans and Model Organisms Am J Hum Genet. Pubmed

Iacono et al. (2018) Increased H3K9 methylation and impaired expression of Protocadherins are associated with the cognitive dysfunctions of the Kleefstra syndrome Nucleic Acids Res. Pubmed

De Boer et al. (2018) EHMT1 mosaicism in apparently unaffected parents is associated with autism spectrum disorder and neurocognitive dysfunction Mol Autism. Pubmed

Koemans et al. (2017) Functional convergence of histone methyltransferases EHMT1 and KMT2C involved in intellectual disability and autism spectrum disorder PLoS Genet. Pubmed

Benevento et al. (2016) Histone Methylation by the Kleefstra Syndrome Protein EHMT1 Mediates Homeostatic Synaptic Scaling Neuron. Pubmed

Balemans et al. (2014) Reduced Euchromatin histone methyltransferase 1 causes developmental delay, hypotonia, and cranial abnormalities associated with increased bone gene expression in Kleefstra syndrome mice Dev Biol. Pubmed

Balemans et al. (2013) Hippocampal dysfunction in the Euchromatin histone methyltransferase 1 heterozygous knockout mouse model for Kleefstra syndrome Hum Mol Genet. Pubmed

Kleefstra et al. (2012) Disruption of an EHMT1-associated chromatin-modification module causes intellectual disability Am J Hum Genet. Pubmed

Willemsen et al. (2012) Update on Kleefstra Syndrome Mol Syndromol. Pubmed

Verhoeven et al. (2011) Kleefstra syndrome in three adult patients: further delineation of the behavioral and neurological phenotype shows aspects of a neurodegenerative course Am J Med Genet A. Pubmed

Nillesen et al. (2011) Characterization of a novel transcript of the EHMT1 gene reveals important diagnostic implications for Kleefstra syndrome Hum Mutat. Pubmed

Willemsen et al. (2011) Familial Kleefstra syndrome due to maternal somatic mosaicism for interstitial 9q34.3 microdeletions Clin Genet. Pubmed

Verhoeven et al. (2010) Behavioral phenotype in the 9q subtelomeric deletion syndrome: a report about two adult patients Am J Med Genet B Neuropsychiatr Genet. Pubmed

Kleefstra et al. (2009) Further clinical and molecular delineation of the 9q subtelomeric deletion syndrome supports a major contribution of EHMT1 haploinsufficiency to the core phenotype J Med Genet. Pubmed

Stewart et al. (2007) The chromosome 9q subtelomere deletion syndrome Am J Med Genet C Semin Med Genet. Pubmed

Kleefstra et al. (2006) Loss-of-function mutations in euchromatin histone methyl transferase 1 (EHMT1) cause the 9q34 subtelomeric deletion syndrome Am J Hum Genet. Pubmed

Kleefstra et al. (2005) Disruption of the gene Euchromatin Histone Methyl Transferase1 (Eu-HMTase1) is associated with the 9q34 subtelomeric deletion syndrome J Med Genet. Pubmed