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Diurnal and seasonal variation of cholecystokinin peptides in humans
Linköping University, Faculty of Health Sciences. Linköping University, Department of Neuroscience and Locomotion, Psychiatry.
Linköping University, Faculty of Health Sciences. Linköping University, Department of Molecular and Clinical Medicine, Obstetrics and gynecology. Östergötlands Läns Landsting, Centre of Paediatrics and Gynecology and Obstetrics, Department of Gynecology and Obstetrics in Linköping.
Linköping University, Faculty of Health Sciences. Linköping University, Department of Neuroscience and Locomotion, Psychiatry. Östergötlands Läns Landsting, Local Health Care Services in Central Östergötland, Department of Psychiatry.
2007 (English)In: Neuropeptides, ISSN 0143-4179, Vol. 41, no 1, 59-63 p.Article in journal (Refereed) Published
Abstract [en]

Cholecystokinin (CCK) was determined in plasma obtained from 10 female (aged 23.4 ± SD 2.3 years) and nine male (aged 22.0 ± SD 1.4 years) healthy volunteers. Blood samples were drawn three times (8.00 a.m., 12 noon and 8.00 a.m.) on each of two sessions, one in the winter (November-December) and one in the summer (April-July). The participants had fasted (and were nicotine-free) since midnight preceding the sampling. A standardized breakfast was served after the first sampling. CCK was determined by radioimmunoassay. The area under the curve 0-24 h (AUC)CCK Winter was lower than AUCCCK Summer (F1:17 = 4.73, P = 0.0440) in the whole group of volunteers. On comparing the CCK concentrations within each session, there was an overall difference in winter (F2:36 = 14.81, P < 0.0001) as well in summer (F2:36 = 18.39, P < 0.0001). Post hoc comparisons yielded a difference between the 8.00 a.m. and 12 noon concentrations on the first day in winter (t = -3.96, P = 0.0009) as well as in summer (t = -4.64, P = 0.0002). The difference between the summer and winter AUCsCCK correlated with the difference between AUCs for temperatures in summer and winter (r = 0.58, P = 0.0089). The correlation was accounted for by the females (r = 0.73, P = 0.0171). The results are in accord with a diurnal and a seasonal variation of CCK in human plasma. © 2006 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2007. Vol. 41, no 1, 59-63 p.
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Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-39205DOI: 10.1016/j.npep.2006.09.049Local ID: 47233OAI: oai:DiVA.org:liu-39205DiVA: diva2:260054
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2011-01-11

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Lundberg, KristinaJosefsson, AnnNordin, Conny

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Faculty of Health SciencesPsychiatryObstetrics and gynecologyDepartment of Gynecology and Obstetrics in LinköpingDepartment of Psychiatry
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