Publications by authors named "Katsuya Hayashi"

Introduction: Issues in sensory processing (hereafter, sensory issues) associated with neurodevelopmental disorders are known to be particularly prominent from 6 to 9 years of age and are a critical issue in school life. These issues affect each individual's quality of life. Some of the issues are known to be relieved by self-care while some are not.

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Introduction: Individuals with neurodevelopmental disorders, such as autism spectrum disorder (ASD), attention-deficit/hyperactivity disorder (ADHD), and specific learning disorders (SLD) have various types of sensory characteristics.

Methods: This study investigated sensory issues in individuals with neurodevelopmental disorders using a web-based questionnaire for qualitative and quantitative analysis, categorized the contents of their three most distressful sensory issues, and evaluated their order of priority.

Results: Auditory problems were reported as the most distressing sensory issue among the participants.

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The mucous glands of Bombyx pupae secrete glue proteins which attach deposited eggs to the mounting sheet. A mutant of a dominant gene, named no glue (Ng), produces nonadhesive eggs which have a low capacity for glue-protein synthesis. In the present study it was shown that the mucous glands of Ng silkworms showed rapid degradation of mRNA as well as rRNA during development; this may cause the low capacity for glue-protein synthesis in the mutant organ.

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Amino acid incorporation was studied with cell-free extracts and ribosomes prepared from pupal ovaries at different ages of Bombyx mori. Poly(U)-directed H-phenylalanine incorporation attained a maximum rate at a certain stage of development, but soon dropped to a low level and was replaced by H-leucine incorporation, which was due to endogenous mRNA. The latter incorporation occurred at the stage when actual protein synthesis takes place in the ovaries.

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