Altered neutrophil apoptosis activity is reversed by melatonin in liver ischemia-reperfusion.
Delayed neutrophil apoptosis has been implicated as the mechanism of the systemic inflammatory response. Herein, we examined the effect of melatonin on the neutrophil apoptosis in ischemia and reperfusion of the human liver. We studied seven patients receiving elective hepatectomy for liver tumor and ten patients receiving laparoscopic cholecystectomy for gallstones. Ten milli liters of blood was drawn isolation and incubation of the human neutrophils. Neutrophil apoptosis activity and CD18 expression and respiratory burst activity were assessed flow cytometrically. Another group of neutrophils included those from the patients receiving hepatectomy and isolated and incubated with melatonin. Neutrophil apoptosis is delayed from patients after hepatectomy or laparoscopic cholecystectomy when compared with that of the preoperative state. The decrease in the apoptosis activity is more severe in patients receiving hepatectomy as compared with those receiving laparoscopic cholecystectomy. Neutrophils from patients receiving hepatectomy or laparoscopic cholecystectomy are functionally activated. Melatonin can reverse the delayed process and enhance the apoptosis activity in neutrophils from patients receiving hepatectomy. This study demonstrates that melatonin enhances neutrophil apoptosis in patients receiving hepatectomy involving ischemia and reperfusion of the human liver.
Chen
Jih-Chang
JC
Departments of Emergency Medicine, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taipei, Taiwan.
Ng
Chip-Jin
CJ
Chiu
Te-Fa
TF
Chen
Han-Ming
HM
D017209:Apoptosis / Q000187:drug effects*; D018821:CD18 Antigens / Q000378:metabolism; D002478:Cells, Cultured; D017081:Cholecystectomy, Laparoscopic; D006498:Hepatectomy; D006801:Humans; D007511:Ischemia / Q000473:pathology; D008099:Liver / Q000098:blood supply*; D008107:Liver Diseases / Q000601:surgery; D008550:Melatonin / Q000494:pharmacology*; D009504:Neutrophils / Q000187:drug effects* / Q000378:metabolism / Q000473:pathology*; D011184:Postoperative Period; D015427:Reperfusion Injury / Q000473:pathology*; D016897:Respiratory Burst / Q000187:drug effects
D018821:CD18 Antigens; D008550:Melatonin