Plasma total and acylated Ghrelin concentrations in patients with clinical and subclinical thyroid dysfunction.

Abstract:

BACKGROUND:Results of circulating Ghrelin levels in hyper- or hypothyroidism are conflicting and only overt thyroid dysfunction has been evaluated. AIM:To evaluate in a large number of patients with thyroid disfunction whether: a) hyper- and hypothyroidism (clinical or subclinical) are associated with variations in both acylated (AG) and total Ghrelin (TG) concentrations, and b) correction of thyroid dysfunction is followed by variations in Ghrelin concentrations. SUBJECTS AND METHODS:Seventy-six hyperthyroids, 52 hypothyroids, 144 euthyroids with chronic autoimmune thyroiditis, and 109 euthyroid healthy controls were evaluated cross-sectionally and longitudinally. RESULTS:TG and AG were significantly lower in hyperthyroids than in controls or hypothyroids; the latter 2 groups did not differ. TG was significantly lower in overt than in subclinical hyperthyroids, with a trend to a reduction also in AG levels. No differences were found between subclinical hyperthyroids and controls. After thionamide treatment, TG and AG levels in hyperthyroids did not differ from controls. L-thyroxine management of hypothyroidism was not associated with significant Ghrelin variations. Plasma Ghrelin was independent of either thyroid or gastric autoimmunity. Plasma TG was negatively correlated with serum free thyroid hormone levels in hyperthyroids but not in hypothyroids. CONCLUSIONS:Plasma Ghrelin concentrations are reduced in overt but not in subclinical hyperthyroidism and normalize after restoration of euthyroidism. Hypothyroidism is not accompanied by significant changes in circulating Ghrelin.

journal_name

J Endocrinol Invest

authors

Tanda ML,Lombardi V,Genovesi M,Ultimieri F,Lai A,Gandolfo M,Dalle Mule I,Grasso L,Bogazzi F,Broglio F,Ghigo E,Martino E,Bartalena L

doi

10.1007/BF03345683

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

74-8

issue

1

eissn

0391-4097

issn

1720-8386

pii

6127

journal_volume

32

pub_type

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