serval:BIB_6ABDC9754261
Decreasing Insulin Sensitivity in Women Induces Alterations in LH Pulsatility.
10.1210/jc.2016-1727
000381930200034
27309039
van Leckwyck
M.
author
Kong
W.
author
Burton
K.J.
author
Amati
F.
author
Vionnet
N.
author
Pralong
F.P.
author
article
2016-08
The Journal of clinical endocrinology and metabolism
1945-7197
0021-972X
journal
101
8
3240-3249
Obesity is associated with neuroendocrine reproductive alterations and decreased fertility.
The objective of the study was to gain insight into the neuroendocrine mechanisms implicated in these alterations.
The effects on pulsatile LH secretion of 28 days of a hypercaloric diet were studied in lean and regularly cycling female volunteers. Approximately 50% extra calories (3 g sucrose/kg body weight per day and 1 g fat/kg body weight per day) were added to their individual daily requirements. Spontaneous and insulin-stimulated LH secretion was recorded on 2 different days, before and at the end of the caloric load.
The hypercaloric diet induced an average weight gain of 2.0 ± 0.3 kg (P < .05), corresponding to a body mass index increase of 0.7 ± 0.1 kg/m(2) (P < .05). A concomitant decrease of 11.6% ± 4.6% in whole-body insulin sensitivity was also observed (δ = -1.6 ± 0.7 mg/kg · min glucose; P < .05). The frequency of spontaneous and insulin-stimulated pulsatile LH secretion was increased by 17.9% ± 9.0% and 26.5% ± 9.0%, respectively (both P < .05). Spontaneous LH peak amplitude was decreased by 26.5% ± 9.0% (δ = -0.7 ± 0.36 U/L; P < .05), a change correlated with insulin sensitivity.
Short-term weight gain in normal female volunteers induces alterations of LH secretion reminiscent to those observed in obesity. A decrease in insulin sensitivity may constitute a mechanistic link between obesity and its associated neuroendocrine dysfunctions.
Adolescent
Adult
Diet, Atherogenic
Diet, High-Fat
Feeding Behavior/physiology
Female
Humans
Infertility, Female/blood
Infertility, Female/etiology
Insulin Resistance/physiology
Luteinizing Hormone/blood
Luteinizing Hormone/secretion
Obesity/blood
Obesity/complications
Young Adult
eng
60_published
SNF/Careers/PZ00P3-149398
true
peer-reviewed
Publication types: Clinical Trial ; Journal Article
Publication Status: ppublish
University of Lausanne
mailto:serval_help@unil.ch
http://www.unil.ch/serval
http://serval.unil.ch/disclaimer
https://serval.unil.ch/notice/serval:BIB_6ABDC9754261