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Response of the thyroid gland of the lizardPodarcis sicula to endothelin-1

✍ Scribed by Virgilio, Francesca ;Sciarrillo, Rosaria ;Laforgia, Vincenza ;Varano, Lorenzo

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
231 KB
Volume
296A
Category
Article
ISSN
0022-104X

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✦ Synopsis

Although endothelins were originally discovered as peptides with vasoconstrictor activity, recent studies have indicated a number of endothelin (ET) induced hormonal functions in various tissues. We have studied the interaction of ET-1 with thyroid gland of the lizard Podarcis sicula. The effects of ET-1 administration on the plasma levels of the thyroid hormones (T3 and T4) and TSH were stimulatory. Morphological changes in the thyroid after treatment with ET-1 were also detected: the height of the epithelial cells slightly increased and the apical surface acquired microvilli protruding into the follicular lumen. The colloid filled up the lumen and showed a rich peripheral vacuolation. In conclusion, a modulatory role in the control of the reptilian thyroid gland is suggested for ET-1. This is the first report on the interaction of ET-1 with the thyroid gland of reptilian.

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