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Hyperthyroidism - Crossref

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Last Updated: 26 July 2022

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Radioiodine treatment of hyperthyroidism in cats: results of 165 cats treated by an individualised dosing algorithm in Spain

This patient-specific dosing algorithm was used to demonstrate the results of 131 I treatment in a European population of hyperthyroid cats. Using thyroid scintigraphy, the thyroid volume and percentage uptake of 99 million Tc-pertechnetate was determined. An initial 131 I dose was determined by averaging dose scores for T4/T3 levels, thyroid volume, and TcTU; 70% of the composite dose was then administered. Twenty-four hours later, percentage 131 I uptake was recorded, and an additional 131 I was administered as needed to give the thyroid tumor a proper radiation dose. Overtly and hypothyroid cats had azotaemia more often than euthyroid cats. Hypothyroid cats were older and more likely to have detectable TSH levels and symmetrical bilateral delivery of 99m Tc-perpetrol uptake, while chronically hyperthyroid cats had higher severity scores.

Source link: https://doi.org/10.1177/1098612x221104743


Feline Comorbidities: Balancing hyperthyroidism and concurrent chronic kidney disease

Both hyperthyroidism and chronic kidney disease in older cats are common long-term diseases that can be diagnosed concurrently or develop at different times. If CKD has already been diagnosed, the hyperthyroidism treatment options should be considered closely. Whether it's impossible to diagnose hyperthyroidism and CKD simultaneously, given that one disorder may mask the other, it's important to determine whether or not an older cat presents vomiting, weight loss, polyuria/polydipsia, anorexia, or sarcopenia when examining an older cat. For cats that are hypothyroid and azotaemic, Levothyroxine is a prescription.

Source link: https://doi.org/10.1177/1098612x221090390


A 33-Year-Old Man with Gynaecomastia and Galactorrhea as the First Symptoms of Graves Hyperthyroidism

High free thyroxine with reduced thyroid-stimulating hormone level along with an elevated anti-TSH receptor was found in laboratory experiments, contributing to the diagnosis of Graves' U2019 disease. The galactorrhea's etiology were expected, so the galactorrhea was hypothesized to be caused by Graves' u2019 disease. To the best of our knowledge, this is the third instance where a male patient with thyrotoxicosis has seen gynaecomaecomaecomaecomaecu and galactorrhea.

Source link: https://doi.org/10.1155/2016/1946824


Hyperthyroidism and production of precocious involution in the mammary glands of lactating rats

In thyroxine-treated rats, serum triiodothyronine and tetraiodothyronine increased. On day 7 and day 14 of lactation, serum prolactin decreased, while serum prolactin dropped, while corticosterone production factor I and progesterone decreased, and corticosterone increased on day 7 of lactation. Tissue concentration in HT pups increased on day 7 and day 14 of lactation on day 7 and day 14, whereas T soared only on day 14 of lactation, and growth hormone increased on day 7 of lactation. On day 14 of lactation in thyroxine-treated rats, the Mammary prolactin binding sites in the liver did not change, but there was an increase in the binding sites in the liver. On day 14 of lactation, Mammary casein, lactose, and total lipid concentrations in thyroxine-treated rats were similar to those of control rats. On day 14 and day 21 of lactation, the TdT-mediated nick-end labelling test revealed an increase in apoptosis in alveolar cells with condensed nuclei, and cell lines with condensed nuclei; on day 14 and day 21 of lactation, and an increase in alveoli showed decreased or no lumina and cells with condensed nuclei. On day 21 of lactation in thyroxine-treated rats, expression of Bcl-2, which also promotes the survival of mammary gland epithelial cells, was unchanged, though expression of IGF-I, which also aids in the survival of mammary gland epithelial cells, rose. These findings show that thyroxine treatment results in some milk stasis as a result of suckling-induced oxytocin release that may start the first stage of mammary evolution, raising apoptosis in a gland that is otherwise active producing and secretly milk.

Source link: https://doi.org/10.1530/rep.0.1240691


ANIMAL MODELS OF DISEASE: Feline hyperthyroidism: an animal model for toxic nodular goiter

The incidence of spontaneous feline hyperthyroidism has risen steadily to the point that it is now one of the most common disorders seen in middle-aged to senior domestic cats since being first reported just 35 years ago. Single or multiple autonomously operating and growing thyroid nodules are found in hyperthyroid cats goiters. One or two palpable thyroid nodules are among the clinical signs of feline toxic nodular goiter disease, as well as signs of hyperthyroidism. In cats, surgical thyroidectomy, radioiodine, and antithyroid drugs are all similar, and include surgical thyroidectomy, radioiodine, and antithyroid drugs. Since the animals are older and the disease will never go into remission, most experts agree that ablative therapy with radioiodine is the best option for most cats with inflammatory nodular goiter.

Source link: https://doi.org/10.1530/joe-14-0461


Effect of transient early hyperthyroidism on onset of puberty in Suffolk ram lambs

Eight 6-week-old Suffolk ram lambs were investigated for thyroid function and sexual growth. Four lambs in the rehabilitation program received 15 mg body weight per day of 6-propyl 2-thiouracil orally to reduce normal thyroid function. FSH levels in treated lambs were lower than in controls from week 6 to week 9. Treatment lambs were lower in treated lambs than in controls from week 10 to week 13, according to an Insulin-like growth factor I. The treated lambs had a higher incidence of testosterone pulses, but the control and treated lambs were similarly affected throughout the study, although concentrations were similar. sperm concentration in treated lambs was higher than in controls at week 36, but semen volumes were similar.

Source link: https://doi.org/10.1530/rep.0.1210639


Hyperthyroidism causes cardiac dysfunction by mitochondrial impairment and energy depletion

In rats treated with triiodothyronine alone for 15 days or more, they were found to improve in the Bzf co-treated condition, including a peroxisome proliferator-activated receptor alpha agonist bezafibrate. Heart health has been monitored at various times during T3 therapy and shows an initial growth and then a gradual but gradual decline with time, which is prevented by Bzf co-treatment.

Source link: https://doi.org/10.1530/joe-12-0304


Interleukin 10 deficiency attenuates induction of anti-TSH receptor antibodies and hyperthyroidism in a mouse Graves' model

In an in vitro T cell culture recall assay, splenocytes from immunized mice produce interferon u03b3 and interleukin 10 in reaction to antigen stimulation. Using IL10-deficient mice, this research was conducted to establish the role of endogenous IL10 in experimental Graves' disease. Although T cell response was increased as predicted by their antigen-specific cytokine IFN-u03b3 reduction in IL10/u2212 mice, a lower risk of Graves' hyperthyroidism was found, as shown by our results, but B cell function was dampened, implying that anti-TSHR antibody titers were reduced, resulting in a reduced risk of Graves' hyperthyroidism in a younger population.

Source link: https://doi.org/10.1530/joe-11-0129


Haemodynamic changes following treatment of subclinical and overt hyperthyroidism

OBJECTIVE: Hyperthyroidism has profound effects on the cardiovascular system, including reduced systemic vascular resistance as a result of vascular smooth muscle cell relaxation, increased heart rate, and cardiac output as a result of a rise in cardiac diastolic growth, contraction, and heart rate. In order to determine whether these patients had signs of elevated thyroid hormone levels at the tissue level, we performed haemodynamic changes in patients with endogenous hypothyroidism. The thyroid function correlated significantly to the haemodynamic values as follows: the higher the thyroid function the lower the mean arterial pressure and SVR, and the greater the CO and central aortic compliance, respectively. Plasma nopinephrine rose sharply after the initial care of the overt hyperthyroid patients, although epinephrine did not change, and no changes were observed among sub-thyroid patients.

Source link: https://doi.org/10.1530/eje.0.1450391


A novel germline mutation in the TSH receptor gene causes non-autoimmune autosomal dominant hyperthyroidism

METHODS: Out of the TSH receptor gene, automatic sequence analysis was performed. Mutant TSHR in COS-7 cells' functional studies included the measurement of specific constitutive function as well as the determination of specific constitutive activity. The discovery of a germline heterozygous substitution at codon 597, which resultes in the novel mutation V597F, was confirmed by a TSHR gene sequence. The V597F mutant's functional studies reveal an 11-fold rise in SCA, which is attributed to a decrease in receptor protein expression on the cytoplasmic membrane. CONCLUSIONS: A story of a family with non-autoimmune autosomal dominant hyperthyroidism carrying a novel TSHR variant that contributed to the increase in specific constitutive involvement. Factors that could influence the clinical expression of TSHR germline mutations are discussed.

Source link: https://doi.org/10.1530/eje.0.1450249

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions