Genila M Bibat

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Methyl-CpG-binding protein 2 is a characteristic member of the methyl-CpG-binding protein family of transcription regulators. In conjunction with Sin3, MeCP2 recruits class I histone deacetylases to methyl-CpG regions to suppress transcription. Rett syndrome, a disorder characterized by mental retardation and autistic features, is associated in a majority(More)
BACKGROUND AND PURPOSE Previous studies have examined volumetric abnormalities in Rett syndrome (RTT), using MR imaging and focusing on selective changes. However, these studies preceded the identification of MECP2 as the gene mutated in most RTT cases. We studied regional brain volume changes as noted by MR imaging in girls with RTT who had mutations in(More)
We describe three cases of the rare syndrome of leukoencephalopathy, brain calcifications, and cysts. Conventional MRI, proton spectroscopy, and diffusion-weighted imaging yielded additional information on the disease. Imaging findings favor increased water content rather than a demyelinating process in the pathophysiology of this disease. Clinical features(More)
The clinical variability of Rett syndrome, associated with mutations in the MECP2 gene, varies from classically symptomatic female patients to asymptomatic female patients, and male patients who have none of the diagnostic features considered pathognomonic of this disease. Multiple factors contribute to this variability. In our studies, mutations closer to(More)
Purpose Rett Syndrome (RTT) is a neurodevelopmental X-linked disease that affects primarily girls. Clinically, these children are normal at birth and then develop progressive autistic-like behavior, neurodevelopmental delay, with loss of motor skills 1. Cerebral volume loss in RTT was attributed to be due to a decrease in neuronal cell body size and(More)
BACKGROUND While behavioural abnormalities are fundamental features of Rett syndrome (RTT), few studies have examined the RTT behavioural phenotype. Most of these reports have focused on autistic features, linked to the early regressive phase of the disorder, and few studies have applied standardised behavioural measures. We used a battery of standardised(More)
OBJECTIVE Brain metabolism, as studied by magnetic resonance spectroscopy (MRS), has been previously shown to be abnormal in Rett syndrome (RTT). This study reports the relation of MRS findings to age, disease severity, and genotype. METHODS Forty RTT girls (1-14 years old) and 12 age-matched control subjects were examined. Single-voxel proton MRS of left(More)
BACKGROUND AND PURPOSE RTT, caused by mutations in the methyl CPG binding protein 2 (MeCP2) gene, is a disorder of neuronal maturation and connections. Our aim was to prospectively examine FA by DTI and correlate this with certain clinical features in patients with RTT. MATERIALS AND METHODS Thirty-two patients with RTT underwent neurologic assessments(More)
OBJECTIVE To describe a distinctive syndrome of nonprogressive encephalopathy, normo- or microcephaly, and early onset of severe psychomotor impairment in 15 white patients, including two siblings and two first cousins. METHODS AND RESULTS MRI revealed bilateral cysts in the anterior part of the temporal lobe and white matter abnormalities with pericystic(More)
OBJECTIVE Duchenne and Becker muscular dystrophies (DBMD) are allelic disorders caused by mutations in dystrophin. Adults with DBMD develop life-threatening cardiomyopathy. Inhibition of phosphodiesterase 5 (PDE5) improves cardiac function in mouse models of DBMD. To determine whether the PDE5-inhibitor sildenafil benefits human dystrophinopathy, we(More)