Key result
Beta-arrestin 2 expression was increased in toxic thyroid nodules and decreased in cold thyroid nodules compared to surrounding tissue, suggesting it desensitizes the activated TSH receptor.
Increased beta-arrestin 2 expression in toxic thyroid nodules suggests it is cAMP dependent and likely desensitizes the constitutively activated TSH receptor in vivo.
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Animal data on β-arrestin 2 in thyroid nodules remain hypothesis-generating; human studies needed before clinical relevance can be assessed.
Voigt et al. (2000) studied Toxic and cold thyroid nodules. Toxic and cold thyroid nodules vs. Corresponding surrounding tissue was evaluated on Expression of beta-arrestins 1 and 2. Beta-arrestin 2 expression was increased in toxic thyroid nodules and decreased in cold thyroid nodules compared to surrounding tissue, suggesting it desensitizes the activated TSH receptor.
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