title: Cellular immune functions of adults treated with a daily, long-term, low dose of 13-cis retinoic acid.
abstract: The effects of long-term consumption of 13-cis retinoic acid (13-cRA) on cellular immune functions were measured in young, adult volunteers. The retinoid was administered for 9 months at about 0.13 mg/kg/day. The mean 8AM concentrations of 13-cRA ranged between 30 and 60 ng/ml of serum throughout the study. Corticosteroid levels in plasma decreased significantly throughout treatment, declining from 15.2 ug/dL to 9.1 mg/dL (p less than 0.05). T-cell mitogenesis stimulated by PHA or A Con A was not significantly affected, although this parameter was slightly depressed during the first 2 months of treatment. The percentage of B-lymphocytes tended to decrease during treatment and returned to normal after cessation of 13-cRA (p less than 0.05), while the percentage of T-cells as measured by E-rosette and by fluorescent antibody tagging of surface antigens did not change. The percentage of non T-cells tended to increase slightly during treatment.
mesh_terms: D000305:Adrenal Cortex Hormones / Q000097:blood; D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface / Q000032:analysis; D001402:B-Lymphocytes / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D004334:Drug Administration Schedule; D005260:Female; D006801:Humans; D007111:Immunity, Cellular / Q000187:drug effects*; D007136:Immunoglobulins; D015474:Isotretinoin; D007958:Leukocyte Count; D008213:Lymphocyte Activation / Q000187:drug effects; D008297:Male; D013601:T-Lymphocytes / Q000145:classification / Q000187:drug effects; D006377:T-Lymphocytes, Helper-Inducer / Q000187:drug effects; D050378:T-Lymphocytes, Regulatory / Q000187:drug effects; D014212:Tretinoin / Q000008:administration & dosage*
chemical_list: D000305:Adrenal Cortex Hormones; D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface; D007136:Immunoglobulins; D014212:Tretinoin; D015474:Isotretinoin