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Updated: May 16, 2026
13:45
Merkel Cell Polyomavirus Infection and Detection
Published on: February 7, 2019
MSH2 and CXCR4 involvement in malignant VIPoma
Sven Müller1, Susan Kupka, Ingmar Königsrainer
1Department of General, Visceral and Transplant Surgery, Tübingen, Germany.
World Journal of Surgical Oncology
|December 13, 2012
Summary
Defects in DNA repair gene MSH2 may drive pancreatic VIPoma development. Increased chemokine CXCR4 expression correlates with liver metastasis in these rare tumors.
Area of Science:
- Endocrinology
- Oncology
- Molecular Biology
Background:
- Vasoactive intestinal polypeptide secreting tumors (VIPomas) are rare pancreatic neuroendocrine tumors.
- The molecular underpinnings of VIPoma development and metastasis remain largely undefined.
Observation:
- Genome and gene expression analysis of primary pancreatic VIPoma and hepatic metastases.
- Utilized oligonucleotide microarrays and loss of heterozygosity (LOH) analysis.
Findings:
- Identified multiple LOH events and differentially expressed genes.
- Observed LOH and downregulation of the mismatch repair gene MSH2 in VIPoma and metastases.
- Detected significant overexpression of the chemokine CXCR4 in hepatic metastases compared to the primary tumor.
Implications:
- MSH2 defects may contribute to VIPoma carcinogenesis via impaired DNA mismatch repair.
- Elevated CXCR4 expression is potentially linked to liver metastasis in VIPoma.
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