One of the main genetic factors determining the functional activity of the genome in somatic cells, including brain nerve cells, is the spatial organization of chromosomes in the interphase nucleus. For a long time, no studies of human brain cells were carried out until high-resolution methods of molecular cytogenetics were developed to analyze interphase chromosomes in nondividing somatic cells. The purpose of the present work was to assess the potential of high-resolution methods of interphase molecular cytogenetics for studying chromosomes and the nuclear organization in postmitotic brain cells. A high efficiency was shown by such methods as multiprobe and quantitative fluorescence in situ hybridization (Multiprobe FISH and QFISH), ImmunoMFISH (analysis of the chromosome organization in different types of brain cells), and interphase chromosome-specific multicolor banding (ICS-MCB). These approaches allowed studying the nuclear organization depending on the gene composition and types of repetitive DNA of specific chromosome regions in certain types of brain cells (in neurons and glial cells, in particular). The present work demonstrates a high potential of interphase molecular cytogenetics for studying the structural and functional organizations of the cell nucleus in highly differentiated nerve cells. Analysis of interphase chromosomes of brain cells in the normal and pathological states can be considered as a promising line of research in modern molecular cytogenetics and cell neurobiology, i. e., molecular neurocytogenetics.
Russian Journal of Genetics – Springer Journals
Published: Sep 30, 2010
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