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  • Title: Morning and afternoon serum levels of cortisone and cortisol in asthmatic patients.
    Author: Fujitaka M, Nomura S, Sakura N, Ueda K, Matuura R, Yumiba C.
    Journal: Clin Chim Acta; 2000 Sep; 299(1-2):101-8. PubMed ID: 10900296.
    Abstract:
    While the diurnal change of serum cortisol in asthmatics has been suggested to influence the occurrence of attacks, this relation remains controversial. Serum concentrations of cortisol, cortisone, and cortisol precursors were measured in the morning and in the afternoon in asthmatic patients by reversed-phase high-performance liquid chromatography. Cortisol and cortisone were detected but their precursors were not. In remission or during attacks, the serum cortisone level in the morning was significantly lower than that in the afternoon, and the serum cortisol level in the morning did not significantly exceed that in the afternoon, which differs from the normal diurnal patterns. In patients with severe asthma in remission, the diurnal pattern of serum cortisone and cortisol was opposite to that seen in normal controls. During the attack, the serum cortisol level showed a lesser increase in the afternoon than in the morning. In patients with persistent asthmatic attacks, the serum cortisone level in the afternoon showed a significant increase as compared with that in remission while their serum cortisol level in the afternoon was equal to that in remission. The diurnal pattern and the duration of asthmatic attacks might be taken into consideration for steroid treatment of asthma.
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