Publications by authors named "M A Ryazanova"

Article Synopsis
  • The study analyzed the distribution of mitochondrial markers (Drp-1, Mfn-2, PGC-1α) in pyramidal neurons of the hippocampus in mice, focusing on the effects of β-amyloid peptide 25-35.
  • Significant changes were noted in the CA3 area on day 38, where levels of the fission marker decreased and fusion marker increased.
  • In the CA1 area, a notable reduction in PGC-1α suggests a drop in mitochondrial biogenesis, hinting at potential early changes linked to memory issues in Alzheimer's disease.
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Eight lines of grain sorghum [ (L.) Moench], which can be used as a promising source material in heterotic hybrid breeding as pollen fertility restorers and donors of resistance to the greenbug ( Rondani), are characterized. The new restorer lines (R-lines) were developed by crossing the maternal sterile line Nizkorosloe 81s (CMS A1) with two lines selected from the grain sorghum collection accessions VIR-928 and VIR-929 as the paternal forms.

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The animal models used in biomedical research cover virtually every human disease. RatDEGdb, a knowledge base of the differentially expressed genes (DEGs) of the rat as a model object in biomedical research is a collection of published data on gene expression in rat strains simulating arterial hypertension, age-related diseases, psychopathological conditions and other human afflictions. The current release contains information on 25,101 DEGs representing 14,320 unique rat genes that change transcription levels in 21 tissues of 10 genetic rat strains used as models of 11 human diseases based on 45 original scientific papers.

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A comparative assessment of the expression of the mitochondrial fission marker Drp1 and the autophagy marker LC3 in neurons and endothelial cells in the hippocampus and entorhinal cortex during progression of cognitive deficit was performed in animals with intrahippocampal administration of β-amyloid. In both brain regions, the expression of Drp1 and LC3 in neuronal and endothelial cells was enhanced. The peak of cognitive impairment corresponded to the maximum expression of Drp1 and LC3 in hippocampal neurons and was preceded by an increase in the number of Drp1 and LC3 endothelial cells in this brain region.

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Research into genetic and physiological mechanisms of widespread disorders such as arterial hypertension as well as neuropsychiatric and other human diseases is urgently needed in academic and practical medicine and in the field of biology. Nevertheless, such studies have many limitations and pose difficulties that can be overcome by using animal models. To date, for the purposes of creating animal models of human pathologies, several approaches have been used: pharmacological/chemical intervention; surgical procedures; genetic technologies for creating transgenic animals, knockouts, or knockdowns; and breeding.

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