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Role of platelets in experimental acute pancreatitis.

Abdulla, Aree LU ; Awla, Darbaz LU ; Hartman Magnusson, Hannes LU ; Rahman, Milladur LU ; Jeppsson, Bengt LU ; Regnér, Sara LU and Thorlacius, Henrik LU (2011) In British Journal of Surgery 98. p.93-103
Abstract
BACKGROUND:: Platelets not only control thrombosis and haemostasis but may also regulate inflammatory processes. Acute pancreatitis (AP) is characterized by changes in both coagulation and proinflammatory activities. The role of platelets in AP is not yet known. METHODS:: AP was induced in C57BL/6 mice by repeated caerulein administration (50 µg/kg intraperitoneally). Mice received a platelet-depleting or control antibody before caerulein challenge. Neutrophil infiltration, myeloperoxidase (MPO) and macrophage inflammatory protein (MIP) 2 levels, acinar cell necrosis and haemorrhage in the pancreas, as well as serum amylase activity, were determined 24 h after caerulein injection. In an alternative model of pancreatitis, L-arginine (4 g/kg... (More)
BACKGROUND:: Platelets not only control thrombosis and haemostasis but may also regulate inflammatory processes. Acute pancreatitis (AP) is characterized by changes in both coagulation and proinflammatory activities. The role of platelets in AP is not yet known. METHODS:: AP was induced in C57BL/6 mice by repeated caerulein administration (50 µg/kg intraperitoneally). Mice received a platelet-depleting or control antibody before caerulein challenge. Neutrophil infiltration, myeloperoxidase (MPO) and macrophage inflammatory protein (MIP) 2 levels, acinar cell necrosis and haemorrhage in the pancreas, as well as serum amylase activity, were determined 24 h after caerulein injection. In an alternative model of pancreatitis, L-arginine (4 g/kg intraperitoneally) was given twice with an interval of 1 h and tissue samples were taken after 72 h [Correction added after online publication 29 September 2010: in the preceding sentence, 4 mg/kg was corrected to 4 g/kg]. RESULTS:: Caerulein administration increased acinar cell necrosis, neutrophil infiltration, focal haemorrhage and serum amylase levels. Platelet depletion reduced acinar cell necrosis, haemorrhage and serum amylase levels in AP. Depletion of platelets decreased caerulein-induced MPO levels and neutrophil recruitment in the pancreas. Platelet depletion abolished caerulein-induced MIP-2 generation in the pancreas and circulation. The effects of platelet depletion on necrosis, neutrophils and MPO levels were confirmed in L-arginine-induced pancreatitis. CONCLUSION:: Platelets play a crucial role in AP by regulating neutrophil infiltration, most likely mediated by MIP-2 production in the pancreas. Copyright © 2010 British Journal of Surgery Society Ltd. Published by John Wiley & Sons, Ltd. (Less)
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publishing date
type
Contribution to journal
publication status
published
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in
British Journal of Surgery
volume
98
pages
93 - 103
publisher
John Wiley & Sons
external identifiers
  • wos:000285253700017
  • pmid:20882560
  • scopus:78650126318
ISSN
1365-2168
DOI
10.1002/bjs.7271
language
English
LU publication?
yes
id
e007ca16-2288-4ab2-a621-a373ada4997c (old id 1711575)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/20882560?dopt=Abstract
date added to LUP
2010-11-03 15:53:24
date last changed
2017-03-19 04:18:32
@article{e007ca16-2288-4ab2-a621-a373ada4997c,
  abstract     = {BACKGROUND:: Platelets not only control thrombosis and haemostasis but may also regulate inflammatory processes. Acute pancreatitis (AP) is characterized by changes in both coagulation and proinflammatory activities. The role of platelets in AP is not yet known. METHODS:: AP was induced in C57BL/6 mice by repeated caerulein administration (50 µg/kg intraperitoneally). Mice received a platelet-depleting or control antibody before caerulein challenge. Neutrophil infiltration, myeloperoxidase (MPO) and macrophage inflammatory protein (MIP) 2 levels, acinar cell necrosis and haemorrhage in the pancreas, as well as serum amylase activity, were determined 24 h after caerulein injection. In an alternative model of pancreatitis, L-arginine (4 g/kg intraperitoneally) was given twice with an interval of 1 h and tissue samples were taken after 72 h [Correction added after online publication 29 September 2010: in the preceding sentence, 4 mg/kg was corrected to 4 g/kg]. RESULTS:: Caerulein administration increased acinar cell necrosis, neutrophil infiltration, focal haemorrhage and serum amylase levels. Platelet depletion reduced acinar cell necrosis, haemorrhage and serum amylase levels in AP. Depletion of platelets decreased caerulein-induced MPO levels and neutrophil recruitment in the pancreas. Platelet depletion abolished caerulein-induced MIP-2 generation in the pancreas and circulation. The effects of platelet depletion on necrosis, neutrophils and MPO levels were confirmed in L-arginine-induced pancreatitis. CONCLUSION:: Platelets play a crucial role in AP by regulating neutrophil infiltration, most likely mediated by MIP-2 production in the pancreas. Copyright © 2010 British Journal of Surgery Society Ltd. Published by John Wiley & Sons, Ltd.},
  author       = {Abdulla, Aree and Awla, Darbaz and Hartman Magnusson, Hannes and Rahman, Milladur and Jeppsson, Bengt and Regnér, Sara and Thorlacius, Henrik},
  issn         = {1365-2168},
  language     = {eng},
  pages        = {93--103},
  publisher    = {John Wiley & Sons},
  series       = {British Journal of Surgery},
  title        = {Role of platelets in experimental acute pancreatitis.},
  url          = {http://dx.doi.org/10.1002/bjs.7271},
  volume       = {98},
  year         = {2011},
}