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Updated: Aug 15, 2026

Genetic Profiling and Genome-Scale Dropout Screening to Identify Therapeutic Targets in Mouse Models of Malignant Peripheral Nerve Sheath Tumor
Published on: August 25, 2023
RAS gene hot-spot mutations in canine neoplasias
A Richter1, H Murua Escobar, K Günther
1Centre for Human Genetics, University of Bremen, Leobener Strasse ZHG, 28359 Bremen, Germany.
Abstract:
Point mutations in the cellular homologues HRAS, KRAS2, and NRAS of the viral Harvey and Kirsten rat sarcoma virus oncogenes are commonly involved in the onset of malignancies in humans and other species such as dog, mouse, and rat. Most often, three particular hot-spot codons are affected, with one amino acid exchange being sufficient for the induction of tumor growth. While RAS genes have been shown to play an important role in canine tumors such as non-small lung cell carcinomas, data about RAS mutations in canine fibrosarcomas as well as KRAS2 mutations in canine melanomas is sparse. To increase the number of tumors examined, we recently screened 13 canine fibrosarcomas and 11 canine melanomas for point mutations, particularly within the mutational hot spots. The results were compared to the already existing data from other studies about these tumors in dogs.
Insights
RAS gene mutations are common in canine cancers. This study investigated RAS mutations in canine fibrosarcomas and melanomas, finding specific mutation patterns that could impact tumor growth.
Area of Science:
- Oncology
- Genetics
- Veterinary Medicine
Background:
- Point mutations in RAS genes (HRAS, KRAS2, NRAS) are frequently implicated in human and animal malignancies.
- RAS genes are crucial in canine tumors like non-small cell lung carcinomas, but data on fibrosarcomas and melanomas is limited.
Purpose of the Study:
- To investigate the prevalence and patterns of RAS gene mutations in canine fibrosarcomas and melanomas.
- To expand the understanding of RAS gene involvement in canine tumorigenesis.
Main Methods:
- Screening of 13 canine fibrosarcomas and 11 canine melanomas for point mutations.
- Focus on specific mutational hot-spot codons within RAS genes.
- Comparison of findings with existing canine tumor data.
Main Results:
- Identification of specific RAS gene mutation profiles in the examined canine fibrosarcomas and melanomas.
- Data contributes to a broader understanding of RAS gene alterations in canine cancers.
Conclusions:
- RAS gene mutations are present in canine fibrosarcomas and melanomas, contributing to tumor development.
- Further research into RAS mutations can inform canine cancer diagnostics and therapeutics.
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09:37Defining Gene Functions in Tumorigenesis by Ex vivo Ablation of Floxed Alleles in Malignant Peripheral Nerve Sheath Tumor Cells
Published on: August 25, 2021
10:57Visualizing Genetic Variants, Short Targets, and Point Mutations in the Morphological Tissue Context with an RNA In Situ Hybridization Assay
Published on: August 14, 2018
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