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Monitoring longitudinal disease progression in a novel murine Kit tumor model using high-field MRI
Markus Kraiger1, Tanja Klein-Rodewald2, Birgit Rathkolb2,3,4
1Institute of Experimental Genetics, German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany. markus.kraiger@helmholtz-muenchen.de.
Magnetic resonance imaging (MRI) characterized a novel Kit-mutant mouse model, revealing dynamic cecal changes, enlarged Peyer's patches, and mammary tumors in females. This study details the in vivo disease cascade in this unique animal model.
Area of Science:
- * Preclinical research
- * Medical imaging
- * Genetics and oncology
Background:
- * Animal models are crucial for studying biological mechanisms, diseases, and therapies.
- * N-ethyl-N-nitrosourea (ENU) is a mutagen used to create genetic mutations in animal models for research.
- * The Kit gene plays a vital role in cell growth and development, and its mutations are linked to various cancers.
Purpose of the Study:
- * To characterize the in vivo clinical manifestations of a novel ENU-induced Kit-mutant mouse model using magnetic resonance imaging (MRI).
- * To track the progression of systemic and organ-specific disease features over twelve months.
- * To establish a comprehensive understanding of the disease cascade in this new model.
Main Methods:
- * In vivo MRI was employed to monitor seven C3H KitN824K/WT mutant mice and littermate controls over twelve months.
- * MRI relaxometry of hematopoietic bone marrow and splenic tissue was performed.
- * High-resolution imaging of gastrointestinal organs was acquired every other month.
Main Results:
- * Mutant mice exhibited dynamic changes in cecum shape and volume, along with enlarged Peyer's patches throughout the study.
- * Mammary tumors were observed in most mutant females, first detected at eight months of age.
- * A significant decrease in longitudinal relaxation times in hematopoietic tissue was noted in mutants at one year, while splenic transverse relaxation times showed no difference except in two cases with leukemia or hemangioma.
Conclusions:
- * In vivo MRI effectively characterized the systemic and organ-specific disease progression in a novel Kit-mutant mouse model.
- * The study provides a detailed timeline of the observable disease cascade, including gastrointestinal changes and tumor development.
- * This Kit-mutant mouse model, characterized by MRI, offers a valuable platform for studying tumor development and systemic manifestations.
