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Osteopontin expression in chronic pancreatitis
Mitsuo Nakamura1, Masaaki Oka, Norio Iizuka
1Department of Surgery II, Yamaguchi University School of Medicine, Ube, Yamaguchi, Japan.
Pancreas
|July 27, 2002
Summary
Osteopontin, a protein linked to calcification, is significantly present in chronic calcifying pancreatitis (CCP) with stones. This suggests osteopontin plays a key role in pancreatic stone formation in CCP.
Area of Science:
- Gastroenterology and Hepatology
- Biochemistry and Molecular Biology
Background:
- Chronic pancreatitis (CP) is a condition often accompanied by pancreatic stones.
- The precise mechanism driving pancreatic stone formation remains largely unknown.
Purpose of the Study:
- To investigate the potential role of osteopontin in the development of pancreatic calculi in patients with CP.
- Osteopontin is known to be involved in urinary stone formation and other calcification-related diseases.
Main Methods:
- Osteopontin messenger RNA (mRNA) expression was assessed using reverse transcription polymerase chain reaction (RT-PCR) and in situ RT-PCR.
- Immunohistochemical staining was employed to identify osteopontin-producing cells.
- Pancreatic tissue samples from 20 CP patients and 5 healthy controls were analyzed.
Main Results:
- Osteopontin was not detected in normal pancreatic tissue.
- All patients with chronic calcifying pancreatitis (CCP) showed osteopontin expression in acinar or ductal cells.
- A significant association was found between osteopontin expression and the presence of pancreatic stones in CP (p = 0.0081).
Conclusions:
- This study provides the initial evidence implicating osteopontin in the pathogenesis of pancreatic stone formation in CP.
- Understanding osteopontin's role may pave the way for novel therapeutic strategies to prevent pancreatic calcification in CP.