Comparison of Allogeneic and Syngeneic Rat Glioma Models by Using MRI and Histopathologic Evaluation

Research in neurooncology traditionally requires appropriate in vivo animal models, on which therapeutic strategies are tested before human trials are designed and proceed. Several reproducible animal experimental models, in which human physiologic conditions can be mimicked, are available for study...

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Published in:Comparative medicine 2017-04, Vol.67 (2), p.147-156
Main Authors: Biasibetti, Elena, Valazza, Alberto, Capucchio, Maria T, Annovazzi, Laura, Battaglia, Luigi, Chirio, Daniela, Gallarate, Marina, Mellai, Marta, Muntoni, Elisabetta, Peira, Elena, Riganti, Chiara, Schiffer, Davide, Panciani, Pierpaolo, Lanotte, Michele
Format: Article
Language:English
Subjects:
Allografts - immunology
Allografts - pathology
Animals
Disease Models, Animal
Glioma - immunology
Glioma - pathology
Isografts - immunology
Isografts - pathology
Magnetic Resonance Imaging - veterinary
Rat Models
Rats - genetics
Rats - immunology
Rats, Inbred F344 - genetics
Rats, Inbred F344 - immunology
Rats, Wistar - genetics
Rats, Wistar - immunology
Reproducibility of Results
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Summary:Research in neurooncology traditionally requires appropriate in vivo animal models, on which therapeutic strategies are tested before human trials are designed and proceed. Several reproducible animal experimental models, in which human physiologic conditions can be mimicked, are available for studying glioblastoma multiforme. In an ideal rat model, the tumor is of glial origin, grows in predictable and reproducible patterns, closely resembles human gliomas histopathologically, and is weakly or nonimmunogenic. In the current study, we used MRI and histopathologic evaluation to compare the most widely used allogeneic rat glioma model, C6-Wistar, with the F98-Fischer syngeneic rat glioma model in terms of percentage tumor growth or regression and growth rate. In vivo MRI demonstrated considerable variation in tumor volume and frequency between the 2 rat models despite the same stereotactic implantation technique. Faster and more reproducible glioma growth occurred in the immunoresponsive environment of the F98-Fischer model, because the immune response is minimized toward syngeneic cells. The marked inability of the C6-Wistar allogeneic system to generate a reproducible model and the episodes of spontaneous tumor regression with this system may have been due to the increased humoral and cellular immune responses after tumor implantation.
ISSN:1532-0820