FKBP51 is associated with early postoperative cognitive dysfunction in elderly patients undergoing hip fracture surgery

Enhanced inflammation response was increasingly reported in association with postoperative cognitive dysfunction (POCD). Glucocorticoid receptor (GR) signal plays a key role in suppression of inflammation. This prospective cohort study aimed to evaluate GR signaling in elderly patients undergoing selective operation. One hundred twenty-six elderly patients were scheduled for hip fracture surgery with general anesthesia. Plasma cortisol levels and the expression levels of GR and FK506 binding protein 51 (FKBP51) in leukocytes were determined at 1 day preoperatively and 7 days. Postoperatively postoperative pain was assessed following surgery using visual analog pain scale (VAS). Neuropsychological tests were performed before surgery and 1 week postoperation. A decline of 1 or more standard deviations in 2 or more tests was considered to reflect POCD. POCD incidence in participants was 28.3% at 1 week after surgery. POCD patients presented significantly higher cortisol and FKBP51 levels compared with non-POCD patients (P < .05). Compared with non-POCD patients, VAS scores at 12 hours after surgery were higher in POCD patients (P < .05). No significant difference in expression levels of GR was found between groups POCD and non-POCD patients. High expression of FKBP51 in leukocytes and glucocorticoid resistance were associated with POCD in aged patients following hip fracture surgery.