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Further Delineation of Neuropsychiatric Findings in Tatton-Brown-Rahman Syndrome Due to Disease-causing Variants in DNMT3A: Seven New Patients

Abstract

Tatton-Brown-Rahman (TBRS) syndrome is a recently described overgrowth syndrome caused by loss of function variants in the DNMT3A gene. This gene encodes for a DNA methyltransferase 3 alpha, which is involved in epigenetic regulation, especially during embryonic development. Somatic variants in DNMT3A have been widely studied in different types of tumors, including acute myeloid leukemia, hematopoietic, and lymphoid cancers. Germline gain-of-function variants in this gene have been recently implicated in microcephalic dwarfism. Common clinical features of patients with TBRS include tall stature, macrocephaly, intellectual disability (ID), and a distinctive facial appearance. Differential diagnosis of TBRS comprises Sotos, Weaver, and Malan Syndromes. The majority of these disorders present other clinical features with a high clinical overlap, making necessary a molecular confirmation of the clinical diagnosis. We here describe seven new patients with variants in DNMT3A, four of them with neuropsychiatric disorders, including schizophrenia and psychotic behavior. In addition, one of the patients has developed a brain tumor in adulthood. This patient has also cerebral atrophy, aggressive behavior, ID, and abnormal facial features. Clinical evaluation of this group of patients should include a complete neuropsychiatric assessment together with psychological support in order to detect and manage abnormal behaviors such as aggressiveness, impulsivity, and attention deficit-hyperactivity disorder. TBRS should be suspected in patients with overgrowth, ID, tall stature, and macrocephaly, who also have some neuropsychiatric disorders without any genetic defects in the commonest overgrowth disorders. Molecular confirmation in these patients is mandatory.

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References
1.
Lapunzina P . Risk of tumorigenesis in overgrowth syndromes: a comprehensive review. Am J Med Genet C Semin Med Genet. 2005; 137C(1):53-71. DOI: 10.1002/ajmg.c.30064. View

2.
Tatton-Brown K, Seal S, Ruark E, Harmer J, Ramsay E, Del Vecchio Duarte S . Mutations in the DNA methyltransferase gene DNMT3A cause an overgrowth syndrome with intellectual disability. Nat Genet. 2014; 46(4):385-8. PMC: 3981653. DOI: 10.1038/ng.2917. View

3.
Lemire G, Gauthier J, Soucy J, Delrue M . A case of familial transmission of the newly described DNMT3A-Overgrowth Syndrome. Am J Med Genet A. 2017; 173(7):1887-1890. DOI: 10.1002/ajmg.a.38119. View

4.
Lyko F . The DNA methyltransferase family: a versatile toolkit for epigenetic regulation. Nat Rev Genet. 2017; 19(2):81-92. DOI: 10.1038/nrg.2017.80. View

5.
Rinaldi L, Datta D, Serrat J, Morey L, Solanas G, Avgustinova A . Dnmt3a and Dnmt3b Associate with Enhancers to Regulate Human Epidermal Stem Cell Homeostasis. Cell Stem Cell. 2016; 19(4):491-501. DOI: 10.1016/j.stem.2016.06.020. View