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A cranial invasion model of human neuroblastoma using congenitally athymic mice
K Yoshida1, G Yoshizawa, Y Yamazaki
1First Department of Surgery, Jikei University School of Medicine, Tokyo, Japan.
Abstract:
Even though the current limits of treatment for advanced stage neuroblastoma require an understanding of biology and new therapeutic approaches, few invasion models of human neuroblastoma (HNB) which evaluate experimental therapies have been reported. We describe herein a reproducible murine model of cranial invasion after the intraocular xenograft of HNB in congenitally athymic mice. Approximately 10 weeks after the intraocular injection of 5 x 10(6) NB-1 HNB cells, 70% (14/20) of the mice developed intracranial invasion with skull involvement. There was no operative mortality. Macroscopically, deformities of the cranium were revealed in all 14 mice, 5 of which developed exophthalmos. Microscopically, cranial invasion mainly involved the extradural space, skull, and orbita; however, brain involvement could not be seen, indicating that the dura may act as a barrier. These invasive characteristics are very similar to those seen in humans; thus, we believe that this model provides a useful tool for evaluating the biology of, and new therapeutic approaches against, cranial invasion of neuroblastoma in vivo.
Insights
Researchers developed a new murine model for studying human neuroblastoma (HNB) cranial invasion. This model mimics human disease, aiding the evaluation of novel therapies for advanced neuroblastoma.
Area of Science:
- Oncology
- Translational Medicine
- Animal Models
Background:
- Advanced stage neuroblastoma treatment is limited by incomplete understanding of its biology.
- Effective experimental therapies require robust in vivo models that accurately reflect human disease progression.
Purpose of the Study:
- To establish and characterize a reproducible murine model for evaluating human neuroblastoma (HNB) cranial invasion.
- To assess the utility of this model for preclinical testing of novel therapeutic strategies.
Main Methods:
- Intraocular xenograft of human neuroblastoma (NB-1) cells into congenitally athymic mice.
- Monitoring for intracranial invasion, skull involvement, and macroscopic/microscopic changes over approximately 10 weeks.
- No operative mortality was observed.
Main Results:
- 70% of mice (14/20) developed intracranial invasion with skull involvement post-xenograft.
- Macroscopic cranial deformities and exophthalmos were observed in affected mice.
- Microscopic analysis revealed invasion of the extradural space, skull, and orbita, with the dura potentially acting as a brain barrier.
Conclusions:
- The developed murine model effectively replicates key aspects of human neuroblastoma cranial invasion.
- This model serves as a valuable tool for investigating neuroblastoma biology and testing new therapeutic approaches in vivo.