title: [Circadian rhythm in allergic inflammation].
abstract: There are significant bioperiodicities for hormonal, neural, cellular, and humoral factors as well as for mediators. A combination of these findings is an explanation for the increased hyperreactivity in patients with allergic diseases during the night. In the morning hours between 2 and 6 a.m., the histamine concentration shows a peak, adrenaline and cyclic AMP have their minimum, while cortisol secretion is just ascending. Circadian variations are also seen with respect to the density of beta-receptors. Thromboxane A2 shows a peak during the night, PGE2 is depressed, a finding also in favour of bronchial constriction. Total plasma protein IgA, IgM, IgG and IgE show a distinct bioperiodicity with a minimum during the night, cellular elements like T11, T4 and B-lymphocytes, and Leu8 have a maximum. The nocturnal symptom exacerbation must be given the fullest attention in choosing the time of administration of the appropriate medication.
authors.affiliation: Abteilung für klinische Immunologie, Universitätsklinikum Rudolf Virchow, Freie Universität Berlin.
authors.forename: C R
authors.initials: CR
authors.lastname: Baumgarten
authors.forename: C
authors.initials: C
authors.lastname: de Baey
authors.forename: B
authors.initials: B
authors.lastname: Siebert
authors.forename: G
authors.initials: G
authors.lastname: Kunkel
mesh_terms: D001249:Asthma / Q000503:physiopathology*; D016535:Bronchial Hyperreactivity / Q000503:physiopathology*; D002940:Circadian Rhythm / Q000502:physiology*; D006636:Histamine Release / Q000502:physiology; D006801:Humans; D006854:Hydrocortisone / Q000097:blood; D007958:Leukocyte Count; D008407:Mast Cells / Q000276:immunology
chemical_list: D006854:Hydrocortisone