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  • Title: Differences in the circadian rhythm parameters of urinary free epinephrine, norepinephrine and dopamine between children and elderly subjects.
    Author: Nicolau GY, Haus E, Lakatua D, Sackett-Lundeen L, Bogdan C, Plingă L, Petrescu E, Ungureanu E, Robu E.
    Journal: Endocrinologie; 1985; 23(3):189-99. PubMed ID: 4048818.
    Abstract:
    The circadian rhythm in the urinary excretion of free epinephrine, norepinephrine and dopamine was studied in 60 elderly men and 83 women, 77 +/- 8 years of age, in a total of 260 24-hour profiles and in 63 boys and 81 girls, 11 +/- 1.5 years of age, in 144 24-hour profiles. The circadian mesor of all these compounds was increased in the children over that in the elderly subjects while the acrophase remained unchanged in spite of a phase shift of the acrophase of the urine excretion of the elderly in the night hours. The differences in functional state of the sympathetic and adreno-medullary function (and/or response) between children and elderly subjects may have clinical implications.
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