PMID: 6406632May 1, 1983Paper

Circannual variations in serum concentrations of pituitary, thyroid, parathyroid, gonadal and adrenal hormones in male laboratory rats

The Journal of Endocrinology
C C WongA von zur Mühlen

Abstract

Seasonal effects were studied on basal levels of hormones in the serum of adult male Sprague-Dawley rats, which were born and raised under rigorously controlled laboratory conditions. Groups of 90-day-old rats were killed at monthly intervals by rapid decapitation. Significant fluctuations were observed throughout the observation period of 19 months in serum levels of TSH, prolactin, androgens, tri-iodothyronine and LH. Minor fluctuations were observed in serum levels of FSH, corticosterone, parathyroid hormone and thyroxine. The results indicate that male laboratory rats exhibit circannual and semi-annual fluctuations in serum levels of several hormones even though the animals were born, raised and maintained in constant laboratory conditions.

Citations

Feb 1, 1989·Biochimie·G BrabantR D Hesch
Jan 1, 1987·Comparative Biochemistry and Physiology. A, Comparative Physiology·A SeidelF Schulz
Feb 1, 1993·Comparative Biochemistry and Physiology. Comparative Physiology·M JallageasA Lacroix
Aug 1, 1991·The Journal of Steroid Biochemistry and Molecular Biology·W E Stumpf, T H Privette
Oct 7, 1998·Physiology & Behavior·C J GerrishJ R Alberts
Aug 1, 1987·Environmental Health Perspectives·J C Barton, W J Huster
Oct 6, 2011·Journal of Cerebral Blood Flow and Metabolism : Official Journal of the International Society of Cerebral Blood Flow and Metabolism·William R GowBruno P Meloni
Jun 19, 2013·Physiology & Behavior·Sherry A Ferguson, Kaitlyn L Maier
Mar 16, 2017·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·Jacob D ReynoldsCory Teuscher
Mar 3, 2020·Chronobiology International·Mayra Liliana Ramírez-RenteríaMiguel Angel Guevara
Jan 1, 1992·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·M JallageasJ P Roussel
May 1, 1984·Journal of Andrology·U PunjabiA Vermeulen
Aug 1, 1990·The American Journal of Physiology·M L LaaksoP T Männistö
Feb 13, 2021·Epilepsy & Behavior : E&B·Medine I GulcebiSanjay M Sisodiya

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.