Cu/Zn-SOD in human pancreatic tissue and pancreatic juice
International Journal of Pancreatology, ISSN: 0169-4197, Vol: 22, Issue: 3, Page: 207-213
1997
- 23Citations
- 6Captures
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Metrics Details
- Citations23
- Citation Indexes23
- 23
- CrossRef10
- Captures6
- Readers6
Article Description
Conclusion. Cu/Zn-SOD is present in pancreatic juice and tissue. Immunohistochemical studies reveal a localization of this enzyme in islet, duct, and centroacinar cells, but to a much lower extent in pancreatic acinar cells. Background. It is generally accepted that oxygen radicals are involved in the pathogenesis of acute and chronic pancreatitis. An imbalance of radical-generating and radical-scavenging processes is thought to lead to the damage of pancreatic acinar cells that initiate the autodigestion of the whole organ. Methods. We investigated the distribution pattern of the cytosolic radical-scavenging enzyme, copper/zinc-superoxide dismutase (Cu/Zn- SOD), in pancreatic juice and tissue. In patients with chronic pancreatitis or pancreatic malignancies, Cu-Zn-SOD was quantitated in different fractions of pancreatic juice by means of an enzyme immunoassay using two Cu/Zn-SOD- specific monoclonal antibodies. Cryostat or paraffin sections of pancreatic tissue were analyzed by immunohistochemical techniques. Results. We found this enzyme to be present in the first secretin-triggered fraction of endoscopically obtained pancreatic juice in concentrations similar to serum. In contrast, after cholecystokinin stimulation, only low levels could be found in pancreatic juice, indicating that this enzyme is not actively secreted. Interestingly, pancreatic juice of patients with chronic pancreatitis or pancreas tumor contained higher levels (25-29 ng/mL) of Cu/Zn-SOD than juice of controls without pancreatic diseases (15 ng/mL). Immunohistochemical studies of Cu/Zn-SOD in pancreatic tissue revealed a more intense staining of duct cells, islet cells, and centroacinar cells, whereas acinar cells showed almost no staining for Cu/Zn-SOD.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0031410569&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/9444552; http://dx.doi.org/10.1007/bf02788386; https://link.springer.com/10.1007/BF02788386; https://dx.doi.org/10.1007/bf02788386; https://link.springer.com/article/10.1007/BF02788386
Springer Science and Business Media LLC
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