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Peripheral blood corticotropin-releasing factor, adrenocorticotropic hormone and cytokine (interleukin beta, interleukin 6, tumor necrosis factor alpha) levels after high- and low-dose total-body irradiation in humans



Peripheral blood corticotropin-releasing factor, adrenocorticotropic hormone and cytokine (interleukin beta, interleukin 6, tumor necrosis factor alpha) levels after high- and low-dose total-body irradiation in humans



Radiation Research 139(3): 360-363



Total-body irradiation (TBI) induces an increase in levels of granulocytes and cortisol in blood. To explore the underlying mechanisms, we studied 26 patients who had TBI prior to bone marrow transplantation. Our findings suggest that only a high dose of TBI (10 Gy) was capable of activating the hypothalamopituitary area since corticotropin-releasing factor and blood adrenocorticotropic hormone levels increased at the end of the TBI. There was a concomitant increase in the levels of interleukin 6 and tumor necrosis factor in blood, suggesting that these cytokines might activate the hypothalamo-pituitary adrenal axis. Interleukin 1 was not detected. Since vascular injury is common after radiation treatment, it is possible that interleukin 6 was secreted by endothelial cells. The exact mechanisms of the production of cytokines induced by ionizing radiation remain to be determined.

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Accession: 009173627

Download citation: RISBibTeXText

PMID: 8073120

DOI: 10.2307/3578835


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