| Autor: |
Betty Ann Bjerkreim, Sara Salehi Hammerstad, Hanne Løvdal Gulseth, Tore Julsrud Berg, Sindre Lee-Ødegård, Anbjørg Rangberg, Christine Monceyron Jonassen, Helen Budge, David Morris, James Law, Michael Symonds, Erik Fink Eriksen |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Frontiers in Endocrinology, Vol 12 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
1664-2392 |
| DOI: |
10.3389/fendo.2021.785175 |
| Popis: |
BackgroundThyroid hormones are essential for the full thermogenic response of brown adipose tissue (BAT) and have been implicated in dermal temperature regulation. Nevertheless, persistent cold-intolerance exists among a substantial proportion of hypothyroid patients on adequate levothyroxine (LT4) substitution.Materials and MethodsTo assess if skin temperature and activation of BAT during treatment with liothyronine (LT3) differs from that of LT4 treatment, fifty-nine female hypothyroid patients with residual symptoms on LT4 or LT4/LT3 combination therapy were randomly assigned in a non-blinded crossover study to receive monotherapy with LT4 or LT3 for 12 weeks each. Change in supraclavicular (SCV) skin temperature overlying BAT, and sternal skin temperature not overlying BAT, during rest and cold stimulation were assessed by infrared thermography (IRT). In addition, abundance of exosomal miR-92a, a biomarker of BAT activation, was estimated as a secondary outcome.ResultsCold stimulated skin temperatures decreased less with LT3 vs. LT4 in both SCV (mean 0.009°C/min [95% CI: 0.004, 0.014]; P |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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