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Cholecystokinin levels in the rat brain during the estrous cycle
Linköping University, Faculty of Health Sciences. Linköping University, Department of Clinical and Experimental Medicine, Clinical Chemistry.
Hökfelt, T., Department of Neuroscience, Karolinska Institutet, Retzius väg 8, SE-171 77 Stockholm, Sweden.
Faculty of Veterinary Medicine, Department of Animal Hygiene, Assuit University, Egypt.
Linköping University, Faculty of Health Sciences. Linköping University, Department of Clinical and Experimental Medicine, Clinical Chemistry. Linköping University, Department of Clinical and Experimental Medicine, Clinical Chemistry.
2007 (English)In: Brain Research, ISSN 0006-8993, E-ISSN 1872-6240, Vol. 1144, no 1, 70-73 p.Article in journal (Refereed) Published
Abstract [en]

Cholecystokinin (CCK) is widely distributed in the brain, and its expression has been shown to be regulated by estrogen. In the present study we used radioimmunoassay to monitor CCK levels in rat brain during a normal estrous cycle. Compared to di-estrous and estrous, CCK-like immunoreactivity was significantly reduced in cingulate and frontal cortex, hippocampus, striatum and hypothalamus during pro-estrous, that is the phase with the highest plasma estradiol levels. These results provide further evidence that circulating steroid hormones in the female rat can influence expression of a brain peptide, in this case CCK, and primarily in the limbic system, which is interesting in the context that CCK has been associated with anxiety and depression in both animals and humans. © 2007 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2007. Vol. 1144, no 1, 70-73 p.
Keyword [en]
Estrogen, Limbic system, Neuropeptide, Radioimmunoassay, Steroid hormone
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-49777DOI: 10.1016/j.brainres.2007.01.107OAI: oai:DiVA.org:liu-49777DiVA: diva2:270673
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-12

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Hilke, SusanneTheodorsson, Elvar

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