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Plasma orexin A levels in recently menopausal women during and 3 years following use of hormone therapy.

Abstract：

OBJECTIVE:Alterations in sleep quality and metabolism during menopause are improved by menopausal hormone therapy (MHT). The mechanisms mediating these effects remain unclear. Orexin A (OxA) is a neuro-peptide that regulates sleep/wakefulness, food intake and metabolism. This study examined changes in plasma OxA levels during and after treatment in women from the Kronos Early Estrogen Prevention Study (KEEPS). METHODS:KEEPS randomized women within three years of menopause to: oral conjugated equine estrogen (o-CEE, 0.45mg/day), transdermal 17β estradiol (t-E2, 50μg/day), or placebo pills and patches for four years. Plasma OxA levels were measured by enzyme immunoassays in fasting blood samples collected annually from KEEPS participants at Mayo Clinic during and three years after MHT. Changes in menopausal symptoms and plasma OxA levels were assessed for treatment differences. RESULTS:During treatment, OxA levels increased more in women randomized to o-CEE compared with the other groups. Women randomized to either form of MHT demonstrated smaller increases in BMI than those on placebo. Insomnia severity decreased similarly among treatment groups. However, neither changes in sleep nor changes in BMI correlated with changes in plasma OxA levels. Changes in waist circumference correlated positively with changes in plasma OxA levels three years after discontinuation of study treatments. CONCLUSIONS:Although OxA levels increased only in women randomized to o-CEE, these changes did not correlate with changes in sleep quality or BMI. The modest correlation of OxA levels with waist circumference once study treatments were discontinued suggests that OxA may be modulated through multiple intermediary pathways affected by metabolites of 17β-estradiol. Clinical Trial Registration for KEEPS: NCT00154180.

journal_name

Maturitas

journal_title

Maturitas

authors

Cintron D,Beckman JP,Bailey KR,Lahr BD,Jayachandran M,Miller VM

doi

10.1016/j.maturitas.2017.01.016

subject

Has Abstract

pub_date

2017-05-01 00:00:00

pages

59-65

eissn

0378-5122

issn

1873-4111

pii

S0378-5122(17)30008-7

journal_volume

99

pub_type

杂志文章,随机对照试验

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