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Träfflista för sökning "WFRF:(Biswas S.) srt2:(2005-2009)"

Sökning: WFRF:(Biswas S.) > (2005-2009)

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  • Fang, Hsin-Yu, et al. (författare)
  • Hypoxia-inducible factors 1 and 2 are important transcriptional effectors in primary macrophages experiencing hypoxia
  • 2009
  • Ingår i: Blood. - : American Society of Hematology. - 1528-0020 .- 0006-4971. ; 114:4, s. 844-859
  • Tidskriftsartikel (refereegranskat)abstract
    • Ischemia exists in many diseased tissues, including arthritic joints, atherosclerotic plaques, and malignant tumors. Macrophages accumulate in these sites and up-regulate hypoxia-inducible transcription factors (HIFs) 1 and 2 in response to the hypoxia present. Here we show that the gene expression profile in primary human and murine macrophages changes markedly when they are exposed to hypoxia for 18 hours. For example, they were seen to up-regulate the cell surface receptors, CXCR4 and GLUT1, and the potent, tumor-promoting cytokines, vascular endothelial growth factor A, interleukin (IL)-1 beta and IL-8, adrenomedullin, CXCR4, and angiopoietin-2. Hypoxia also stimulated their expression and/or phosphorylation of various proteins in the nuclear factor-kappa B (NF-kappa B) signaling pathway. We then used both genetic and pharmacologic methods to manipulate the levels of HIFs-1 alpha and 2 alpha or NF-kappa B in primary macrophages to elucidate their role in the hypoxic induction of many of these key genes. These studies showed that both HIF-1 and -2, but not NF-kappa B, are important transcriptional effectors regulating the responses of macrophages to such a period of hypoxia. Further studies using experimental mouse models are now warranted to investigate the role of such macrophage responses in the progression of various diseased tissues, such as malignant tumors. (Blood. 2009; 114: 844-859)
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