Long-term recovery of β-cell function after partial pancreatectomy in humans.

Glucose homeostasis is significantly altered immediately after partial pancreatectomy. The present study examined the long-term consequences of a hemipancreatectomy in 10 patients with chronic pancreatitis and 10 patients with benign pancreatic and extrapancreatic tumors. A 240-minute oral glucose challenge was performed before and shortly after pancreatic surgery, as well as after a follow-up of 3.1 ± 0.5 years. Plasma concentrations of glucose, insulin, and C-peptide were determined; and indices of insulin sensitivity and insulin secretion were calculated. In both groups of patients, fasting and postchallenge glucose concentrations were significantly altered immediately after surgery, but returned to preoperative levels at the time of follow-up (P < .0001). Postchallenge insulin and C-peptide concentrations were reduced immediately after surgery (P < .0001), but were partly normalized at the time of follow-up (P < .0001). These changes were not accompanied by improvements in insulin sensitivity (Matsuda index). However, the oral disposition index revealed a significant recovery of β-cell function at the time of follow-up (P < .05). These findings demonstrate a capacity for recovery of glucose control after partial pancreatectomy and suggest that β-cell function can improve significantly over time even in adult humans.