AI Article Synopsis
- Thyroid hormone levels (T4 and T3) in great tit nestlings were studied from hatching to when they fledged at 16 days old.
- T4 levels started low at 1-2 ng/ml for the first two days and peaked at 9-10 ng/ml around 12 days, coinciding with maximum body weight, and this pattern was consistent in both sexes.
- T3 levels remained low (1-3 ng/ml) throughout, with a brief but significant increase during the early nestling period for both male and female birds.
Article Abstract
Plasma concentrations of thyroid hormones (T4 and T3) were examined in nestlings of the altricial great tit (Parus major), from hatching to when young birds left the nest at 16 days of age. T4 levels were approximately 1-2 ng/ml during the first 2 days after hatching and increased to reach maximal levels (9-10 ng/ml) 12 days after hatching, a time at which nestlings reach maximum body weight. Both sexes showed the same pattern. T3 levels showed a quite different pattern. Levels were at all times low (1-3 ng/ml). Both sexes showed a transitory, but significant, increase in circulating levels of T3 during the early nestling period.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1006/gcen.1996.0104 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Digenic Inheritance Mode in Congenital Hypothyroidism due to Thyroid Dysgenesis: HYPOTYGEN translational cohort study.
J Clin Endocrinol Metab
January 2025
IMAGINE Institute Affiliate, INSERM U1163, Paris, France.
Context: Congenital hypothyroidism (CH) is the most common neonatal endocrine disorder and is chiefly caused by thyroid dysgenesis (CHTD). The inheritance mode of the disease remains complex.
Objectives: Gain insight into the inheritance mode of CHTD.
Biomarkers.
Alzheimers Dement
December 2024
Centre for Brain Research, Indian Institute of Science, Bangalore, Karnataka, India.
Background: Thyroid disorders is one of the most common endocrine disorders. It is estimated that 42 million people suffer from thyroid disorders in India. The imbalance in thyroid hormone levels can significantly impact cognitive health of older population.
View Article and Find Full Text PDFPublic Health.
Alzheimers Dement
December 2024
Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milano, Italy.
Background: Overt hyperthyroidism and hypothyroidism are regarded as possible causes of reversible dementia. Evidence on the risk of dementia associated with subclinical thyroid dysfunctions is limited and barely existent in the very old, while findings are conflicting.
Objective: To cross-sectionally and longitudinally investigate the association of subclinical-hyperthyroidism and subclinical-hypothyroidism with dementia in a prospective population-based study of 80-years or older residents in Varese province, Italy (Monzino 80-plus Study).
Evaluation of a point-of-care test for quantitative determination of total thyroxine in feline serum.
J Feline Med Surg
January 2025
Department of Veterinary Medicine and Animal Sciences (DIVAS), University of Milan, Lodi (LO), Italy.
Objectives: Total thyroxine (TT4) evaluation is the most commonly used first-line test for the diagnosis and monitoring of cats with hyperthyroidism. Vcheck T4 is a point-of-care immunoassay that measures TT4 using a Vcheck V200 analyser. This study aimed to evaluate the analytic performance of the Vcheck T4 assay in feline sera and the agreement in the classification of normal, high and low TT4 concentrations of Vcheck T4 with those measured by an enzyme immunoassay (EIA).
View Article and Find Full Text PDFExploring the potential regulation of DUOX in thyroid hormone‑autophagy signaling via IGF‑1 in the skeletal muscle (Review).
Biomed Rep
March 2025
Department of Physiology, Faculty of Medicine, Maranatha Christian University, Bandung, West Java 40164, Indonesia.
Dual oxidases (DUOX) are enzymes that have the main function in producing reactive oxygen species (ROS) in various tissues. DUOX also play an important role in the synthesis of HO, which is essential for the production of thyroid hormone. Thyroid hormones can influence the process of muscle development through direct stimulation of ROS, 5' AMP-activated protein kinase (AMPK) and mTOR and indirect effect autophagy and the insulin-like growth factor 1 (IGF-1) pathway.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!