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Expression of COX-2 and p53 in juvenile polyposis coli and its correlation with adenomatous changes
Shatavisha Das Gupta, Ram Narayan Das, Ranajoy Ghosh
1Department of Pathology, The Institute of Post-Graduate Medical Education and Research, Kolkata, West Bengal, India.
Insights
Juvenile polyposis coli (JPC) shows significantly higher cyclooxygenase-2 (COX-2) expression compared to solitary rectal polyps (SRP). This finding may inform future chemopreventive therapies for JPC.
Area of Science:
- Gastroenterology
- Pediatric Pathology
- Molecular Oncology
Background:
- Gastrointestinal polyps are common in children, with solitary rectal polyps being most frequent.
- Juvenile polyposis coli (JPC) is a rare condition characterized by multiple gastrointestinal polyps.
- Cyclooxygenase-2 (COX-2) is implicated in gastrointestinal cancer development.
Purpose of the Study:
- To compare the clinicopathological features of JPC and solitary rectal polyps (SRP).
- To investigate and compare the expression of COX-2 and p53 in JPC and SRP.
- To determine the potential role of COX-2 in the pathogenesis of JPC.
Main Methods:
- Analysis of 38 polyps from eight JPC cases and 40 SRPs.
- Clinicopathological assessment of polyp size and adenomatous changes.
- Immunohistochemical evaluation of COX-2 and p53 expression.
Main Results:
- JPC polyps were significantly larger than SRPs.
- Adenomatous changes and COX-2 expression were significantly higher in JPC compared to SRP.
- All JPC polyps with adenomatous change exhibited strong COX-2 expression; p53 expression showed no significant difference between groups.
Conclusions:
- Juvenile polyposis coli demonstrates significantly elevated COX-2 expression.
- Understanding COX-2's role in JPC may lead to novel chemopreventive strategies.
- Targeting COX-2 could complement surgical management for JPC.
Introduction:
Gastrointestinal polyps commonly affect the pediatric population. The commoner variety amongst these is the solitary rectal polyp. Juvenile polyposis coli (JPC) is rare, characterized by multiple polyps occurring throughout the gut.
Aim:
The role of cyclooxygenase-2 (COX-2) has been implicated in gastrointestinal tumorigenesis. We aimed to look at the clinicopathological spectrum of solitary vs juvenile polyposis and compare their differences in expression of COX-2 and p53.
Materials And Methods:
We studied 38 polyps from eight cases of JPC, collected over the past 10 years along with 40 solitary rectal polyps (SRP).
Results:
The size of polyps was significantly more in cases of JPC compared to SRP. Adenomatous change was observed significantly more often in JPC. COX-2 expression was also significantly higher in the JPC group compared to SRPs. All cases of JPC polyps with adenomatous change showed strong COX-2 expression. There was no significant difference in expression of p53 in the JPC and SRP groups.
Conclusion:
We observed significantly higher COX-2 expression in JPC. Establishment of the role of COX-2 in JPC will help us formulate chemopreventive therapies as an adjunct to its surgical management.
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