Feline Thyroid Disorders and Treatment Modalities
Summary
Feline thyroid disorders, predominantly hyperthyroidism in ageing cats, represent a major endocrine challenge in veterinary medicine. The condition is most often caused by benign adenomatous hyperplasia or adenoma, resulting in excessive secretion of thyroxine (T4) and triiodothyronine (T3). Clinically, affected cats exhibit weight loss, polyphagia, irritability, tachycardia and potential progression to hypertrophic cardiomyopathy. Diagnosis centres on measurement of total and free thyroid hormone concentrations, thyroid‐stimulating hormone (TSH) levels and imaging modalities such as scintigraphy or ultrasonography. Therapeutic approaches include antithyroid pharmacotherapy (typically methimazole), radioiodine ablation and surgical thyroidectomy. Each modality demands careful balancing of restoration of euthyroidism against the risk of iatrogenic hypothyroidism, which may unmask or exacerbate chronic kidney disease. Recent advances have elucidated molecular drivers of spontaneous disease, refined biomarkers for renal and endocrine monitoring, and explored adjunct strategies to mitigate oxidative stress. The integration of these insights promises more individualised treatment regimens, improved long‐term outcomes and enhanced quality of life for cats worldwide.
Research from Nature Portfolio
Transcriptomic profiling of thyroid gland specimens from hyperthyroid versus euthyroid cats has uncovered acquired missense mutations in the Gsα subunit and thyroid‐stimulating hormone receptor. These mutations provoke constitutive activation of cyclic AMP signalling, clarifying the pathogenesis of spontaneous feline hyperthyroidism. By pinpointing key molecular alterations downstream of TSH receptors, this research opens avenues for targeted therapeutics beyond classic enzyme‐inhibition strategies, potentially enabling precision modulation of aberrant signalling pathways in affected cats.
Feline Thyroid Disorders and Treatment Modalities publication trend
The graph below shows the total number of articles in feline thyroid disorders and treatment modalities across all publications each year (not limited to Nature Index journals).
Technical terms
Hyperthyroidism: Excessive production of thyroid hormones leading to a hypermetabolic state.
Hypothyroidism: Insufficient thyroid hormone levels resulting in reduced metabolic activity.
Thyroxine (T4): The primary hormone secreted by the thyroid gland, regulating metabolism.
Thyroid‐stimulating hormone (TSH): Pituitary hormone that stimulates thyroid hormone synthesis and release.
Radioiodine: A radioactive isotope of iodine used to ablate overactive thyroid tissue.
Symmetric dimethylarginine (SDMA): A biomarker of renal function less affected by muscle mass than creatinine.
Oxidative stress: An imbalance between reactive oxygen species production and antioxidant defences.
References
- Transcriptomic analysis reveals a critical role for activating Gsα mutations in spontaneous feline hyperthyroidism. Scientific Reports (2024).
- Evaluation of Antioxidant Supplementation on Redox Unbalance in Hyperthyroid Cats Treated with Methimazole: A Blinded Randomized Controlled Trial. Antioxidants (2019).
- Assessment of serum symmetric dimethylarginine and creatinine concentrations in hyperthyroid cats before and after a fixed dose of orally administered radioiodine. Journal of Veterinary Internal Medicine (2020).
- Changes in thyroid and renal function after bilateral thyroidectomy in cats. Journal of Veterinary Internal Medicine (2019).
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