open access

Vol 57, Supp. A (2006)
Original papers
Published online: 2006-09-25
Submitted: 2013-02-15
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The effect of levothyroxine on the proliferative activity of the thyroid follicular cells

Janusz Dzięcioł, Anna Zonenberg, Beata Klim, Urszula Łebkowska, Anna Popławska, Dorota Lemancewicz, Piotr Kasprzyk, Katarzyna Ziętara

open access

Vol 57, Supp. A (2006)
Original papers
Published online: 2006-09-25
Submitted: 2013-02-15

Abstract

Introduction: Pharmacological treatment of non-toxic nodular goitre with levothyroxine has caused a discussion about its effectiveness and safety. The aim of the study was to examine the influence of levothyroxine on the proliferative activity of the thyroid follicular cells.
Material and methods: Cytological material was obtained from 32 euthyroid females, aged 34-69 years, by USG-guided Fine-Needle Aspiration Biopsy (FNAB), before and after 6 months treatment with levothyroxine. The patients were divided into 2 age groups: up to 45 years (14 patients) and above 45 years (18 females). Proliferative activity of the follicular cells was assessed by the proliferative index (PI), representing the percentage of follicular cells with positive reaction with the antibody Ki-67. Microscopic evaluation was carried out using morphometric computer system MicroImage InCD UDF (Olympus).
Results: After 6-months of treatment IP values decreased significantly in both groups studied (8.59 &plusmn; 3.07 vs 6.51 &plusmn; &plusmn; 1.91; p < 0.001 in females aged < 45 years and 7.72 &plusmn; 1.83 vs 5.09 &plusmn; 1.51; p < 0.001 in the older group).
Conclusion: Our results indicate that levothyroxine has an influence on the proliferative activity of the thyroid follicular cells, particularly in post-menopausal women.

Abstract

Introduction: Pharmacological treatment of non-toxic nodular goitre with levothyroxine has caused a discussion about its effectiveness and safety. The aim of the study was to examine the influence of levothyroxine on the proliferative activity of the thyroid follicular cells.
Material and methods: Cytological material was obtained from 32 euthyroid females, aged 34-69 years, by USG-guided Fine-Needle Aspiration Biopsy (FNAB), before and after 6 months treatment with levothyroxine. The patients were divided into 2 age groups: up to 45 years (14 patients) and above 45 years (18 females). Proliferative activity of the follicular cells was assessed by the proliferative index (PI), representing the percentage of follicular cells with positive reaction with the antibody Ki-67. Microscopic evaluation was carried out using morphometric computer system MicroImage InCD UDF (Olympus).
Results: After 6-months of treatment IP values decreased significantly in both groups studied (8.59 &plusmn; 3.07 vs 6.51 &plusmn; &plusmn; 1.91; p < 0.001 in females aged < 45 years and 7.72 &plusmn; 1.83 vs 5.09 &plusmn; 1.51; p < 0.001 in the older group).
Conclusion: Our results indicate that levothyroxine has an influence on the proliferative activity of the thyroid follicular cells, particularly in post-menopausal women.
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Keywords

nodular non-toxic goitre; follicular cells; proliferative activity; Ki-67; levothyroxine

About this article
Title

The effect of levothyroxine on the proliferative activity of the thyroid follicular cells

Journal

Endokrynologia Polska

Issue

Vol 57, Supp. A (2006)

Pages

52-58

Published online

2006-09-25

Keywords

nodular non-toxic goitre
follicular cells
proliferative activity
Ki-67
levothyroxine

Authors

Janusz Dzięcioł
Anna Zonenberg
Beata Klim
Urszula Łebkowska
Anna Popławska
Dorota Lemancewicz
Piotr Kasprzyk
Katarzyna Ziętara

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