Endoscopy 2001; 33(5): 448-453
DOI: 10.1055/s-2001-14260
Short Communication

© Georg Thieme Verlag Stuttgart · New York

Neutrophil Activation and Hyperamylasaemia after Endoscopic Retrograde Cholangiopancreatography: Potential Role for the Leukocyte in the Pathogenesis of Acute Pancreatitis

D. V. Mann, P. Kalu, S. Foulds, R. Edwards, G. Glazer
  • Dept. of Surgery, St Mary’s Hospital, London, UK
Further Information

Publication History

Publication Date:
31 December 2001 (online)

Background and Study Aims: Hyperamylasaemia occurs in up to 60 % of patients following endoscopic retrograde cholangiopancreatography (ERCP), and in a small proportion of patients (1 - 5 %) acute pancreatitis may develop. We evaluated the role of the neutrophil in post-ERCP hyperamylasaemia and acute pancreatitis by measuring circulating CD11b adhesion receptor expression - an indicator of leukocyte activation.

Patients and Methods: A total of 43 patients undergoing elective ERCP were studied. Peripheral blood measurements of amylase activity and neutrophil CD11b content (by flow cytometry) were made immediately before ERCP (baseline), and at 2 and 24 hours after the procedure.

Results: ERCP induced an increase in amylase level above baseline in 41 of 43 patients. The 2-hour and 24-hour post-ERCP amylase levels were directly related (R = 0.9, P < 0.01). Baseline CD11b receptor status was positively correlated with post-ERCP amylase activity (R = 0.4, P < 0.05), and this relationship was stronger when pancreatography had been performed (R = 0.67, P < 0.01). Three patients (7 %) developed clinical acute pancreatitis, with post-ERCP amylase levels persistently elevated above 1000IU/l. Multiple linear regression identified CD11b expression as the most significant explanatory variable for amylase level after ERCP (multiple R = 0.74, P < 0.01).

Conclusions: The findings from this pilot study indicate an association between neutrophil activation and hyperamylasaemia following ERCP, and suggest a role for this leukocyte in the pathogenesis of pancreatitis. Further study of neutrophil characteristics may allow identification of individual susceptibility to ERCP-induced pancreatic injury.

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D. Mann, M.D.

Dept. of Surgery
Prince of Wales Hospital
Chinese University of Hong Kong

Shatin
New Territories
Hong Kong


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