1999/11/01 by P Dandona, Paresh Dandona, Malvika Suri +4 · 1 citation
Immunology and Microbiology · Medicine · #Adrenal Hormones and Disorders #Anesthesia #Basal (medicine) #Biochemistry #Biology #Diabetes mellitus #Endocrinology #Hydrocortisone #Internal medicine #Medicine #Neutrophil, Myeloperoxidase and Oxidative Mechanisms #Pharmacodynamics #Pharmacokinetics #Pharmacology #Reactive oxygen species #Sepsis Diagnosis and Treatment
paper · doi:10.1097/00003246-199911000-00020
openalex publication_date 1999/11/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
OBJECTIVE: To determine whether hydrocortisone given intravenously inhibits reactive oxygen species (ROS) generation by polymorphonuclear neutrophils (PMNLs) in vivo and, if so, to describe the pharmacodynamics of this effect. DESIGN: A prospective, open label study in normal subjects. SETTING: A clinical research unit of a tertiary referral center for diabetes and endocrinology. PATIENTS: Eight normal subjects (age range, 2450 yrs). INTERVENTION: An indwelling cannula was inserted into the antecubital vein. Sequential blood samples were obtained from the cannula just before, and after, the intravenous injection of hydrocortisone (100 mg) at 1, 2, 4, 8, and 24 hrs. MEASUREMENTS AND MAIN RESULTS: ROS generation by PMNLs and mononuclear cells (MNCs) was assayed as previously observed in a chemiluminometer. ROS generation by PMNLs and MNCs was inhibited by hydrocortisone at 1 hr; this effect peaked at 2 hrs and began to recover by 4 hrs; ROS generation had recovered to the baseline by 24 hrs. Although the pharmacodynamic effect of hydrocortisone on PMNLs and MNCs was similar, the peak inhibition was significantly greater for PMNLs (26% of basal vs. 43% of basal, p<.02) than MNCs. CONCLUSIONS: There is a marked, consistent, inhibition of ROS generation by PMNLs, which parallels that of MNCs after intravenous hydrocortisone. The pharmacodynamics of this effect are consistent with our current clinical practices.