genes and chromosomes: control of development

Clicks: 222
ID: 225240
2004
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Abstract
The past decade has witnessed immense progress in research into the molecular basis behind the developmental regulation of genes. Sets of genes functioning under hierarchical control have been identified, evolutionary conserved systems of genes effecting the cell-to-cell transmission of transmembrane signals and assigned a central role in morphogenesis have been intensively studied; the concept of genomic regulatory networks coordinating expression of many genes has been introduced, to mention some of the major breakthroughs. It should be noted that the temporal and tissue-specific parameters of gene expression are correctly regulated in development only in the context of the chromosome and that they are to a great extent dependent on the position of the gene on the chromosome or the interphase nucleus. Moreover epigenetic inheritance of the gene states through successive cell generations has been conducted exclusively at the chromosome level by virtue of cell or chromosome memory. The ontogenetic memory is an inherent property of the chromosome and cis-regulation has a crucial role in its maintenance.
Durante a última década houve imenso progresso na pesquisa sobre as bases moleculares da regulação gênica durante o desenvolvimento. Foram identificados grupos de genes funcionando sob controle hierárquico, sistemas de genes conservados ao longo da evolução atuando na transmissão célula a célula de sinais transmembrana e com uma função central na morfogênese foram intensamente estudados e o conceito de redes genômicas regulatórias coordenando a expressão de diversos genes foi introduzido, para citar apenas alguns dos principais avanços. Deve-se notar que os parâmetros tempo e tecido-específicos da expressão gênica são corretamente regulados durante o desenvolvimento apenas no contexto do cromossomo e que são amplamente dependentes da posição do gene no cromossomo ou no núcleo em interfase. Além do mais, a herança epigenética dos estados gênicos através de sucessivas gerações celulares foi conduzida exclusivamente ao nível cromossômico em função da memória celular ou cromossômica. A memória ontogenética é uma propriedade inerente do cromossomo e a regulação em cis tem um papel crucial em sua manutenção.
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Authors ;Oleg Serov;Irina Serova
Journal hypertension (dallas, tex : 1979)
Year 2004
DOI
10.1590/S0001-37652004000300007
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000300007
Keywords
epigenetic regulation organization of the interphase nucleusscience

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