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Endothelial function, insulin sensitivity and inflammatory markers in hyperprolactinemic pre-menopausal women.

Abstract：

BACKGROUND:Hyperprolactinemia has been reported to be associated with abnormalities of carbohydrate metabolism. The aim of this study was to evaluate the effects of hyperprolactinemia and bromocriptine (Brc) treatment on endothelial function, insulin sensitivity and inflammatory markers in pre-menopausal women. METHODS:Sixteen hyperprolactinemic pre-menopausal women with pituitary adenomas were recruited and 20 healthy subjects were included as controls. Patients were given Brc in doses of 2.5-20 mg/dl until normal levels of prolactin were reached. Prior to treatment and 2 months after prolactin levels were normalized, the following tests were performed. Insulin sensitivity was determined by an oral glucose tolerance test based on a formula named the insulin sensitivity index (ISI composite). Endothelial function was measured as flow-mediated dilatation (FMD) on a brachial artery using high resolution ultrasound. RESULTS:Serum glucose, insulin, estrogen, highly sensitive C-reactive protein (hsCRP), fibrinogen, homocysteine and uric acid levels were measured. Calculated ISI composite and FMD were significantly lower in the hyperprolactinemic group in comparison with the controls and improved after Brc treatment. Serum homocysteine, hsCRP and uric acid levels were significantly higher in hyperprolactinemic patients than in the controls and returned to normal levels with Brc treatment. Serum prolactin concentrations were inversely correlated with FMD measurements (r=-0.68; P<0.0001), ISI composite (r=-0.48; P<0.005) and serum estrogen (r=-0.54; P<0.005), and positively correlated with serum homocysteine concentrations (r=0.55; P<0.0001) in the hyperprolactinemic group. CONCLUSIONS:The hyperprolactinemic state is associated with impaired endothelial function and decreased insulin sensitivity, which are early markers of atherosclerosis. These alterations may predispose to the development of atherosclerosis in non-treated cases. Correction of the hyperprolactinemic state is associated with improved endothelial function and insulin sensitivity.

journal_name

Eur J Endocrinol

journal_title

European journal of endocrinology

authors

Yavuz D,Deyneli O,Akpinar I,Yildiz E,Gözü H,Sezgin O,Haklar G,Akalin S

doi

10.1530/eje.0.1490187

subject

Has Abstract

pub_date

2003-09-01 00:00:00

pages

187-93

issue

eissn

0804-4643

issn

1479-683X

journal_volume

149

pub_type

临床试验,杂志文章

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Endothelial function, insulin sensitivity and inflammatory markers in hyperprolactinemic pre-menopausal women.