Peer-reviewed veterinary case report
IGF-1 levels in hyperthyroid cats before and after thiamazole
By Rochel, Daphné et al.·Published in Journal of feline medicine and surgery·2018·Department of Biology, France·View original on PubMed →
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Original publication title: Insulin-like growth factor type 1 concentrations in hyperthyroid cats before and after treatment with thiamazole.
- Species:
- cat
Plain-English summary
A group of hyperthyroid cats was treated with thiamazole, a medication that helps manage their condition. Before treatment, their thyroid hormone levels were high, but after three months of thiamazole, these levels dropped significantly. Interestingly, the levels of insulin-like growth factor type 1 (IGF-1) in these cats increased after treatment, suggesting that IGF-1 may be linked to the severity of hyperthyroidism. Overall, the cats showed improvement in their thyroid function after starting thiamazole therapy.
People also search for: hyperthyroid cat treatment · thiamazole for cats · cat insulin-like growth factor levels
Abstract
Objectives The aim of this study was to evaluate changes in circulating insulin-like growth factor type 1 (IGF-1) concentrations in hyperthyroid cats, before and after thiamazole treatment. Methods Thirty-four hyperthyroid cats were retrospectively included. Plasma free thyroxine (fT4) and IGF-1 concentrations were measured at diagnosis and 3 months after initiating antithyroid drug therapy. Results Median fT4 significantly decreased ( P <0.001) after treatment (from 78 pmol/l [range 43-122 pmol/l] to 31 pmol/l [range below assay limit of detection to 88 pmol/l]), whereas IGF-1 values significantly increased ( P <0.001) after treatment (from 117 ng/ml [33-341 ng/ml] to 221 ng/ml [36-865 ng/ml]). fT4 and IGF-1 concentrations were significantly negatively correlated both at diagnosis (r = -0.43, P = 0.01) and after treatment (r = -0.51, P = 0.002). Conclusions and relevance In cats, IGF-1 concentrations appear to be inversely proportional to the severity of hyperthyroidism and significantly increase after treatment with thiamazole.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/29172902/