NDLI: The pars tuberalis as a target of the central clock

Content Provider	Springer Nature Link
Author	Ross, Alexander W. Morgan, Peter J.
Copyright Year	2002
Abstract	The pars tuberalis (PT) of the pituitary has emerged from being a gland of obscure and unknown function to a tissue of central importance to our understanding of how photoperiod regulates seasonal responses. The discovery of melatonin receptors on this gland first pointed to its involvement in seasonal physiology. However, the more recent demonstration of the expression of clock genes in the PT, such as Per1, has heightened interest in the gland. Recent work shows how photoperiod, through the hormone melatonin, affects the timing and amplitude of expression of the Per1 gene, as well as other genes such as Icer. The effect of photoperiod and melatonin on the expression of Per1 in the PT is distinct to its effects on the SCN, and this probably reflects distinct functions of the clock genes in the two tissues – acting as part of the biological clock in the SCN, but as an interval timing system within the PT. The changes in amplitude of Per1 gene expression in response to altered length of photoperiod have provided the first clues as to how the durational melatonin signal is decoded within the neuroendocrine system.
Starting Page	163
Ending Page	171
Page Count	9
File Format	PDF
ISSN	0302766X
Journal	Cell and Tissue Research
Volume Number	309
Issue Number	1
e-ISSN	14320878
Language	English
Publisher	Springer-Verlag
Publisher Date	2014-01-24
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Human Genetics Proteomics Molecular Medicine
Content Type	Text
Resource Type	Article
Subject	Cell Biology Histology Pathology and Forensic Medicine

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