title: Disappearance of CD4 lymphocyte circadian cycles after autologous bone marrow transplantation.
abstract: Circadian variations are observed in CD4 lymphocyte count in healthy people. Samples taken of the basal value occurring around 08.00 hr and peak value at midnight made it possible to define the range of cyclic variations. Movement of lymphocytes seems important in accounting for the observed circadian variations. CD4 circadian cycle amplitudes were investigated in 12 patients with autologous bone marrow transplantation. Cycle abnormalities were observed in 7 patients. Two of them had a normal CD4 lymphocyte count. It was therefore possible for functional abnormalities in CD4 lymphocytes to be detected in patients with a normal CD4 count. Because of these results, we are of the opinion that the evaluation of CD4 lymphocyte cycle might be a more sensitive test than the absolute CD4 count itself.
mesh_terms: D016026:Bone Marrow Transplantation; D015496:CD4-Positive T-Lymphocytes / Q000166:cytology / Q000502:physiology*; D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D007958:Leukocyte Count; D008297:Male; D014182:Transplantation, Autologous