Publications by authors named "Ibuki Ueoka"

Genetic defects in ribosome biogenesis result in a group of diseases called ribosomopathies. Patients with ribosomopathies manifest multiorgan phenotypes, including neurological impairments. A well-characterized ribosomopathy, Shwachman-Diamond syndrome (SDS), is mainly associated with loss-of-function mutations in the causal gene SBDS.

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Various mutations in the gene have been reported in mitochondrial diseases that are sometimes classified as type 2 Charcot-Marie-Tooth disease, optic atrophy, and Leigh syndrome. Although human SLC25A46 is a well-known transporter that acts through the mitochondrial outer membrane, the relationship between neurodegeneration in these diseases and the loss-of-function of remains unclear. Two genes, ) and ) have been identified as candidate homologs of human .

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Article Synopsis
  • The knockdown of the dABCA gene in Drosophila leads to increased social space and hyperactivity in adult flies, but does not affect their climbing ability.
  • The study found that this gene knockdown resulted in an increase in active zones and satellite bouton numbers in motor neuron presynaptic terminals while reducing learning abilities in larvae.
  • The hippo mutation was found to enhance adult hyperactivity but suppress the increase in satellite boutons, suggesting a link between dABCA, lipid transport, and various cellular functions affecting the Hippo signaling pathway.
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AlkB family proteins are enzymes that repair alkylated DNA and RNA by oxidative demethylation. Nine homologs have been identified and characterized in mammals. ALKBH1 is conserved among metazoans including Drosophila.

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Whole exome analyses have identified a number of genes associated with autism spectrum disorder (ASD) and ASD-related syndromes. These genes encode key regulators of synaptogenesis, synaptic plasticity, cytoskeleton dynamics, protein synthesis and degradation, chromatin remodeling, transcription, and lipid homeostasis. Furthermore, in silico studies suggest complex regulatory networks among these genes.

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Mutations in the HADHB gene induce dysfunctions in the beta-oxidation of fatty acids and result in a MTP deficiency, which is characterized by clinical heterogeneity, such as cardiomyopathy and recurrent Leigh-like encephalopathy. In contrast, milder forms of HADHB mutations cause the later onset of progressive axonal peripheral neuropathy (approximately 50-80%) and myopathy with or without episodic myoglobinuria. The mechanisms linking neuronal defects in these diseases to the loss of HADHB function currently remain unclear.

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Mutations in SLC25A46 gene have been identified in mitochondrial diseases that are sometimes classified as Charcot-Marie-Tooth disease type 2, optic atrophy and Leigh syndrome. Human SLC25A46 functions as a transporter across the outer mitochondrial membrane. However, it is still unknown how the neurodegeneration occurring in these diseases relates to the loss of SLC25A46 function.

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Autism spectrum disorder (ASD) is characterized by persistent deficits in social communication and social interactions, as well as restricted, stereotyped patterns of behavior and interests. In addition, alterations in circadian sleep-wake rhythm are common in young children with ASD. Mutations in ATP binding cassette subfamily A member 13 (ABCA13) have been recently identified in a monkey that displays behavior associated with ASD.

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