Circadian clock linked to Angelman syndrome

Biologists have found a direct link between the biological clock and Angelman syndrome, a neurogenetic disorder that occurs in more than one in every 15,000 live births. The link may provide a valuable way to judge the effectiveness of the first experimental drugs under development for treating the syndrome.
Source: ScienceDaily Headlines - Category: Science Source Type: news

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Whole exome sequencing and methylation‑specific multiplex ligation‑dependent probe amplification applied to identify Angelman syndrome due to paternal uniparental disomy in two unrelated patients. Mol Med Rep. 2019 Jun 05;: Authors: Li H, Yang H, Lv N, Ma C, Li J, Shang Q Abstract Angelman syndrome (AS) is a congenital neuro-developmental disorder typically occurring due to functional defects of the UBE3A gene caused by uniparental disomy (UPD), translocation or single gene mutation. UBE3A gene exhibits imprinting expression, and only maternal inherited alleles express functional UBE3A protein in t...
Source: Molecular Medicine Reports - Category: Molecular Biology Tags: Mol Med Rep Source Type: research
ConclusionOverall, this research identifies the behavioral and molecular consequences ofCYFIP1 overexpression and how they contribute to the variable phenotype seen in Dup15q syndrome and in ASD patients with excess CYFIP1.
Source: Molecular Autism - Category: Molecular Biology Source Type: research
No abstract available
Source: Clinical Dysmorphology - Category: Genetics & Stem Cells Tags: Short Case Reports Source Type: research
Possibility of early diagnosis in a fetus affected by Prader‑Willi syndrome with maternal hetero‑UPD15: A lesson to be learned. Mol Med Rep. 2019 May 15;: Authors: Dong Y, Liu S, Li J, Li J, Chen Q, Luo J, Li C, Li H, Qi H, Li R Abstract Prader‑Willi syndrome (PWS), a complicated neurodevelopmental disorder arising from errors in genomic imprinting, is characterized by evident hypotonia along with feeding difficulties and the absence of crying in early infancy. Hyperphagia and obesity are not uncommon in patients with PWS, usually accompanied by intellectual disability, cognitive impairment, shor...
Source: Molecular Medicine Reports - Category: Molecular Biology Tags: Mol Med Rep Source Type: research
This article also addresses the neuropharmacological potential of taurine analogs.Graphical abstract
Source: Redox Biology - Category: Biology Source Type: research
ConclusionsTaken together, these results emphasize that UBE3A critically impacts early brain development, but plays a more limited role in adulthood. Our findings provide important considerations for upcoming clinical trials in which UBE3A gene expression is reactivated and suggest that even transient UBE3A reinstatement during a critical window of early development is likely to prevent most adverse Angelman syndrome phenotypes. However, sustained UBE3A expression into adulthood is probably needed for optimal clinical benefit.
Source: Molecular Autism - Category: Molecular Biology Source Type: research
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Source: Developmental Neurorehabilitation - Category: Neurology Authors: Source Type: research
We report the necessary complementary pattern here: individuals with Angelman syndrome, a genomic imprinting disorder resulting from increased relative paternal genetic contribution, demonstrate a relatively reduced relaxation response to song, suggesting increased demand for parental attention. These results support the extension of genetic conflict theories to psychological resources like parental attention.
Source: Evolution and Human Behavior - Category: Psychiatry & Psychology Source Type: research
ConclusionsThis study shows that individuals with AS have high HRU/STU, and apart from a few differences, HRU/STU was similar across molecular etiology. These results reflect usage in younger individuals and studies that describe HRU/STU in older individuals are needed.
Source: Molecular Genetics & Genomic Medicine - Category: Genetics & Stem Cells Authors: Tags: ORIGINAL ARTICLE Source Type: research
An experimental agent promises to improve the lives of patients with Angelman syndrome, a rare genetic disorder for which there are no approved therapies and that carries a high, unmet medical need.Medscape Medical News
Source: Medscape Today Headlines - Category: Consumer Health News Tags: Neurology & Neurosurgery News Source Type: news
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