Prevalence and importance of internal tandem duplications in exons 11 and 12 of c- kit in mast cell tumors of dogs
| Autor: | Philip H. Kass, May B. Chien, Sue Downing, Peter F Moore, Cheryl A. London |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Oncology
medicine.medical_specialty Pathology Skin Neoplasms Toceranib Molecular Sequence Data Mast-Cell Sarcoma Biology Polymerase Chain Reaction Metastasis law.invention Dogs law Internal medicine medicine Animals Clinical significance Dog Diseases Polymerase chain reaction Base Sequence General Veterinary DNA Neoplasm Exons General Medicine Mast cell medicine.disease Proto-Oncogene Proteins c-kit genomic DNA medicine.anatomical_structure Imatinib mesylate Tandem Repeat Sequences Mutation Mast cell sarcoma medicine.drug |
| Zdroj: | American Journal of Veterinary Research. 63:1718-1723 |
| ISSN: | 0002-9645 |
| Popis: | Objective—To determine the prevalence of activating internal tandem duplications (ITDs) in exons 11 and 12 of c-kit in mast cell tumors (MCTs) of dogs and to correlate these mutations with prognosis. Sample Population—157 formalin-fixed, paraffinembedded MCTs from dogs in the pathology database of the Veterinary Medical Teaching Hospital at the University of California, Davis. Procedure—Genomic DNA was isolated from tumor specimens and a polymerase chain reaction procedure was performed to determine whether there were ITDs in exons 11 and 12. Results—We identified ITDs in 1 of 12 (8%) grade-I, 42 of 119 (35%) grade-II, and 9 of 26 (35%) grade-III tumors (overall prevalence, 52 of 157 [33%]). Logistic regression analysis revealed that the odds of grade-II and -III tumors possessing an ITD were approximately 5 times greater than that for grade-I tumors, although these odds did not differ significantly. Although MCTs possessing an ITD were twice as likely to recur after excision and twice as likely to result in metastasis as those without an ITD, these values also did not differ significantly. Conclusions and Clinical Relevance—These results provide evidence that ITDs in c-kit occur frequently in MCTs of dogs. The high prevalence of c-kit activating mutations in MCTs of dogs combined with the relative abundance of mast cell disease in dogs provide an ideal naturally developing tumor in which to test the safety and efficacy of novel small-molecule kinase inhibitors such as imatinib mesylate. (Am J Vet Res 2002;63:1718–1723) |
| Databáze: | OpenAIRE |
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