Background: Macrocomplexes can be the cause of elevated serum hormone concentrations and may cause diagnostic confusion. This is well recognized for prolactin and commonly screened for using polyethylene glycol (PEG) precipitation. The phenomenon and a suitable screening method is less familiar with respect to thyroid-stimulating hormone (TSH).
Method: Samples sent to the laboratory for routine analysis of thyroid function and found to have a TSH >10 mU/L were evaluated to determine the prevalence of macro-TSH in the Roche Elecsys assay, using PEG precipitation with confirmation by gel filtration chromatography.
Results: Of 495 samples tested, 3 (0.6%) were found to have macro-TSH. From the distribution of recoveries, a cut-off <25% was determined for identifying samples requiring further investigation for the presence of macro-TSH.
Conclusion: The prevalence of elevated TSH due to macro-TSH was found to be 0.6%. Laboratories should be aware of this cause of assay interference.
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http://dx.doi.org/10.1177/0004563213476271 | DOI Listing |
Cureus
November 2024
Department of Endocrinology and Metabolism, Linping Campus, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, CHN.
Objective To investigate the clinical characteristics of nodular goitre (NG) and the relationship between NG and papillary thyroid carcinoma (PTC). Methods A total of 282 consecutive patients suspicious for thyroid cancer were enrolled. All the patients underwent surgical resection of the thyroid.
View Article and Find Full Text PDFJ Transl Med
December 2024
Department of Neurology, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei, China.
Taltirelin, an orally effective thyrotropin-releasing hormone analog, significantly improves motor impairments in rat models of Parkinson's disease (PD) and enhances dopamine release within the striatum. However, the underlying mechanism remains unclear. In this study, a variety of in vivo and in vitro methods, including transcriptomic analysis, were employed to elucidate the effects of Taltirelin on cellular composition and signaling pathways in the striatum of hemi-PD rats.
View Article and Find Full Text PDFBMC Endocr Disord
December 2024
Internal Medicine Department, Endocrinology Unit, Faculty of Medicine, Alexandria University, Alexandria, Egypt.
Background: Autoimmune thyroid diseases (AITD) and allergic rhinitis (AR) are prevalent conditions; however, limited research has investigated their association. This study aimed to evaluate whether AR can be considered a risk factor for developing AITD.
Methods: A retrospective cohort study analyzed the records of AITD patients who visited Alexandria University Students Hospital between January 2017 and December 2021.
BMC Geriatr
December 2024
Department of Internal Medicine, Ankara Training and Research Hospital, Ankara, Turkey.
Unlabelled: BACKGROUND AND RATIONALE: Thyroid dysfunction in older adults often mimics the signs of aging, impacting metabolism and overall physiological balance. While age-related chronic conditions have been extensively studied, the relationship between thyroid function and frailty remains underexplored.
Objective: This study aimed to evaluate the effects of thyroid dysfunction on frailty among individuals aged 65 years and older.
Front Endocrinol (Lausanne)
December 2024
Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Background: Type 2 diabetes mellitus (T2DM) poses a significant public health challenge, contributing to considerable morbidity and mortality worldwide, which necessitates urgent preventive measures. Thyroid disorders, prevalent in many individuals, are intricately linked to metabolic health, yet studies on their relationship with T2DM yield inconsistent results-some suggesting an increased risk with abnormal thyroid hormone levels, while others indicate potential protective effects. This study investigated the association between changes in serum thyroid-stimulating hormone (TSH) and free thyroxine (FT4) levels and the incidence of type 2 diabetes mellitus.
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