TY - JOUR
T1 - Modulation of body temperature, interleukin-6 and leptin by oral contraceptive use
AU - Salkeld, Brittney D.
AU - Macaulay, Jannell C.
AU - Ball, Richard W.
AU - Cannon, Joseph G.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2001
Y1 - 2001
N2 - Objectives: This study examined the hypothesis that oral contraceptives (OC) influence the production of thermo-regulatory cytokines, i.e. interleukin-6 (IL-6), soluble IL-6 receptor (sIL-6R), soluble glycoprotein 130 (s-gp 130) and leptin, and that OC-induced changes in oral temperature (T oral) are associated with changes in plasma concentrations of these cytokines. To determine if increases in T oral are part of a cytokine-driven inflammatory (acute-phase) response, circulating concentrations of the hepatic acute-phase protein C-reactive protein (CRP) were also measured. Methods: Morning T oral were measured and blood samples were collected from 18 women (19- to 22-years-old) on two occasions: Once during active pill usage (quasi-luteal (QL) phase) and once when no active pills were taken (quasi-follicular (QF) phase). Plasma cytokine and CRP concentrations were measured by immunoassay. Results: T oral and plasma leptin were higher during QL phase (36.4 ± 0.1°C, 9.3± 1.0 ng/ml) than QF phase (36.1 ± 0.1°C, p<0.01; 7.5± 0.7 ng/ml, p<0.01). Increases in T oral correlated with increases in plasma leptin (R = 0.55, p = 0.02) and with progestin dose (R = 0.47, p = 0.05) individually as well as with leptin and progestin combined in a multiple regression (R = 0.68, p = 0.01). Plasma IL-6 correlated with progestin dose (R = 0.62, p = 0.006). Although there were no phase-related differences in plasma IL-6, sIL-6R, s-gp130, or CRP, the variation in CRP between individuals correlated with the IL-6 agonist/antagonist ratio combined with progestin dose in a multiple regression (R = 0.71, p = 0.01). Conclusions: These results (a) implicate leptin in basal thermoregulation; (b) indicate that progestins have a significant influence on circulating IL-6 concentrations, and (c) are consistent with the concept that plasma CRP concentrations depend upon combined influences of progestins and bioavailable IL-6.
AB - Objectives: This study examined the hypothesis that oral contraceptives (OC) influence the production of thermo-regulatory cytokines, i.e. interleukin-6 (IL-6), soluble IL-6 receptor (sIL-6R), soluble glycoprotein 130 (s-gp 130) and leptin, and that OC-induced changes in oral temperature (T oral) are associated with changes in plasma concentrations of these cytokines. To determine if increases in T oral are part of a cytokine-driven inflammatory (acute-phase) response, circulating concentrations of the hepatic acute-phase protein C-reactive protein (CRP) were also measured. Methods: Morning T oral were measured and blood samples were collected from 18 women (19- to 22-years-old) on two occasions: Once during active pill usage (quasi-luteal (QL) phase) and once when no active pills were taken (quasi-follicular (QF) phase). Plasma cytokine and CRP concentrations were measured by immunoassay. Results: T oral and plasma leptin were higher during QL phase (36.4 ± 0.1°C, 9.3± 1.0 ng/ml) than QF phase (36.1 ± 0.1°C, p<0.01; 7.5± 0.7 ng/ml, p<0.01). Increases in T oral correlated with increases in plasma leptin (R = 0.55, p = 0.02) and with progestin dose (R = 0.47, p = 0.05) individually as well as with leptin and progestin combined in a multiple regression (R = 0.68, p = 0.01). Plasma IL-6 correlated with progestin dose (R = 0.62, p = 0.006). Although there were no phase-related differences in plasma IL-6, sIL-6R, s-gp130, or CRP, the variation in CRP between individuals correlated with the IL-6 agonist/antagonist ratio combined with progestin dose in a multiple regression (R = 0.71, p = 0.01). Conclusions: These results (a) implicate leptin in basal thermoregulation; (b) indicate that progestins have a significant influence on circulating IL-6 concentrations, and (c) are consistent with the concept that plasma CRP concentrations depend upon combined influences of progestins and bioavailable IL-6.
KW - Cytokine
KW - Estrogen
KW - Inflammation
KW - Progestin
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U2 - 10.1159/000059389
DO - 10.1159/000059389
M3 - Article
C2 - 12045359
AN - SCOPUS:0035741195
SN - 1021-7401
VL - 9
SP - 319
EP - 325
JO - NeuroImmunoModulation
JF - NeuroImmunoModulation
IS - 6
ER -