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Wyświetlanie 1-3 z 3
Tytuł:
Od wzorów ekspresji genów i motywów regulatorowych do predykcji i modelowania ekspresji genów - wyzwania i nadzieje
Predicting and modeling gene expression from genomic sequences - hopes and challenges
Autorzy:
Dąbrowski, Michał
Kamińska, Bożena
Powiązania:
https://bibliotekanauki.pl/articles/1196817.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Przyrodników im. Kopernika
Opis:
Control of eukaryotic transcription involves combinatorial interactions between transcription factors and regulatory sequences in the genome. In addition, chromatin structure and modification states play key roles in the complex control of transcription. The maturation of methods for detecting in vivo protein-DNA interactions on a genome-wide scale, detailed maps of chromatin features and transcription factor localization over entire genomes of eukaryotic cells increases our understanding of the properties and nature of transcriptional regulatory mechanisms. The knowledge gained from large-scale investigations has challenged some conventional concepts of promoter structure and function, and provided valuable insights into the complex gene regulatory mechanisms. Here, we review recent experimental and computational advances that have enabled identification and analysis of regulatory regions on an unprecedented scale, allowing for systematic determination of the transcriptional regulatory networks in eukaryotic cells. Analysis of high-throughput gene expression data together with genomic sequence(s) holds promise of revealing features of cis-regulatory sequences responsible for co-regulation of many genes. This general approach has proved successful in simpler organisms, and recent studies in Metazoa reported features over-represented in groups of genes with particular expression patterns revealing gene regulatory mechanisms.
Źródło:
Kosmos; 2009, 58, 1-2; 67-77
0023-4249
Pojawia się w:
Kosmos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Farmakologiczna modulacja funkcji i żywotności astrocytów jako nowa strategia neuroprotekcji po niedokrwieniu
Pharmacological modulation of function and viability of astrocytes as a novel neuroprotective strategy in stroke
Autorzy:
Szydłowska, Kinga
Kamińska, Bożena
Powiązania:
https://bibliotekanauki.pl/articles/1197456.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Przyrodników im. Kopernika
Opis:
Neuron-astrocyte interactions are critical for signalling, energy metabolism, extracellular ion and glutamate homeostasis, volume regulation and neuroprotection in the central nervous system. Glutamate uptake by astrocytes may prevent excitotoxic glutamate elevation and determine neuronal survival. However, activation of astrogliosis and brain inflammation during cerebral ischemia exacerbates primary brain damage, resulting in upregulation of cytotoxic/infammatory cytokines and mediators, that alter blood flow and increase vascular permeability, thus leading to secondary damage and accumulation of immune cells in the brain. Although, astrocytes are more resistant than neurons to ischemic injury, astrocyte death have been demonstrated in animal models of brain ischemia. Exposure of cultured cortical astrocytes to glutamate induces apoptotic cell death and similar events can be detected in ischemic brain. FK506, an inhibitor of calcineurin and immunosuppressive drug, is neuroprotective in animal models of neurologic diseases, including focal and global ischemia. FK506 exerts a complex action on many processes ongoing in pathological brain: it directly protects neurons from glutamate-induced neuronal cell death, reduces gliosis and brain inflammation in animal models of stroke, and inhibits Glu-induced apoptosis of astrocytes in vitro and in ischemic brain. Altogether, recent findings suggest that modulation of astrocyte functions and astrocytic survival/cell death in neurodegeneration may be a novel therapeutic strategy in neurological disorders.
Źródło:
Kosmos; 2008, 57, 3-4; 315-329
0023-4249
Pojawia się w:
Kosmos
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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