Please use this identifier to cite or link to this item:
Title: Effects of acute and chronic sleep loss on immune modulation of rats
Authors: Zager, A.
Andersen, M. L.
Ruiz, F. S.
Antunes, I. B.
Tufik, Sergio [UNIFESP]
Universidade Federal de São Paulo (UNIFESP)
Keywords: sleep deprivation
immune system
host defenses
Issue Date: 1-Jul-2007
Publisher: Amer Physiological Soc
Citation: American Journal of Physiology-regulatory Integrative and Comparative Physiology. Bethesda: Amer Physiological Soc, v. 293, n. 1, p. R504-R509, 2007.
Abstract: Sleep deprivation is now recognized as an increasingly common condition inherent to modern society, and one that in many ways, is detrimental to certain physiological systems, namely, immune function. Although sleep is now viewed by a significant body of researchers as being essential for the proper working of a host of defense systems, the consequences of a lack of sleep on immune function remains to be fully comprehended. the aim of the current study was to investigate how paradoxical sleep deprivation (PSD) for 24 and 96 h and sleep restriction (SR) for 21 days by the modified multiple-platform method, and their respective 24-h recovery periods, affect immune activation in rats. To this end, we assessed circulating white blood cell counts, lymphocyte count within immune organs, as well as Ig and complement production. the data revealed that PSD for 96 h increased complement C3 and corticosterone concentration in relation to the control group. in contrast, the spleen weight, total leukocytes, and lymphocytes decreased during SR for 21 days when compared with the control group, although production of a certain class of immunoglobulin, the IgM, did increase. After recovery sleep, lymphocyte count in axillary lymph nodes grew when rats had rebound sleep after PSD for 24 h, neutrophils increased after PSD 96 h and lymphocytes numbers were higher after SR 21 days. Such alterations during sleep deprivation suggest only minor alterations of nonspecific immune parameters during acute PSD, and a significant impairment in cellular response during chronic SR.
ISSN: 0363-6119
Other Identifiers:
Appears in Collections:Em verificação - Geral

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.