Circadian variations in plasma 3':5'-cyclic adenosine monophosphate and 3':5'-cyclic guanosine monophosphate of normal adults. |
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| Authors: | M Mikuni Y Saito T Koyama M Daiguji I Yamashita K Yamazaki M Honma M Ui |
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| Affiliation: | 1. Department of Psychiatry and Neurology, Hokkaido University School of Medicine, Sapporo, Japan;7. Child Unit, Seiryoin, Sapporo City General Hospital Sapporo, Japan;71. Department of Physiological Chemistry, Faculty of Pharmaceutical Science, Hokkaido University, Sapporo, Japan |
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| Abstract: | Circadian variations in plasma cyclic AMP and cyclic GMP were studied in thirteen male subjects (20–22 years old) under controlled invironmental condition. Plasma collections were made every six hours. Cyclic AMP and cyclic GMP were determined by radioimmunoassay. Individual values of plasma cyclic AMP at 0800 are between 13.0 and 25.8 pmole/ml, and cyclic GMP between 2.5 and 7.0 pmole/ml. Cyclic AMP demonstrated the circadian variation with the maximum level at 1400 and the minimum at 0200, and cyclic GMP with the highest level at 1400 and the lowest level at 0800. |
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