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Updated: Jun 26, 2025
Creating Anatomically Accurate and Reproducible Intracranial Xenografts of Human Brain Tumors
Published on: September 24, 2014
Direct Implantation of Patient Brain Tumor Cells into Matching Locations in Mouse Brains for Patient-Derived
Lin Qi1,2,3,4, Patricia Baxter2,3, Mari Kogiso2,3
1Shenzhen Key Laboratory for Systems Medicine in Inflammatory Diseases, School of Medicine, Sun Yat-sen University, Shenzhen 510080, China.
Abstract:
Background: Despite multimodality therapies, the prognosis of patients with malignant brain tumors remains extremely poor. One of the major obstacles that hinders development of effective therapies is the limited availability of clinically relevant and biologically accurate (CRBA) mouse models. Methods: We have developed a freehand surgical technique that allows for rapid and safe injection of fresh human brain tumor specimens directly into the matching locations (cerebrum, cerebellum, or brainstem) in the brains of SCID mice. Results: Using this technique, we successfully developed 188 PDOX models from 408 brain tumor patient samples (both high-and low-grade) with a success rate of 72.3% in high-grade glioma, 64.2% in medulloblastoma, 50% in ATRT, 33.8% in ependymoma, and 11.6% in low-grade gliomas. Detailed characterization confirmed their replication of the histopathological and genetic abnormalities of the original patient tumors. Conclusions: The protocol is easy to follow, without a sterotactic frame, in order to generate large cohorts of tumor-bearing mice to meet the needs of biological studies and preclinical drug testing.
Insights
Researchers developed a new surgical technique to create accurate mouse models of brain tumors. This method improves preclinical drug testing and the study of brain tumor biology.
Area of Science:
- Neuro-oncology
- Translational research
- Surgical innovation
Background:
- Malignant brain tumors have a poor prognosis despite current therapies.
- A key challenge is the lack of clinically relevant and biologically accurate (CRBA) mouse models.
- Developing effective treatments is hindered by inadequate preclinical models.
Purpose of the Study:
- To establish a novel, efficient method for generating patient-derived xenograft (PDX) models of brain tumors.
- To overcome limitations of existing models for advancing brain tumor research and therapy development.
Main Methods:
- A freehand surgical technique was developed for direct injection of fresh human brain tumor specimens into SCID mice.
- Injections were targeted to specific brain regions (cerebrum, cerebellum, brainstem) matching the original tumor location.
- This method bypasses the need for stereotactic frames, simplifying the procedure.
Main Results:
- 188 patient-derived orthotopic xenograft (PDOX) models were successfully generated from 408 patient samples.
- High success rates were achieved for various brain tumor types, including high-grade glioma (72.3%), medulloblastoma (64.2%), and ATRT (50%).
- Characterization confirmed that the PDOX models accurately recapitulated the histopathological and genetic features of the original human tumors.
Conclusions:
- The described freehand surgical technique provides an accessible and effective means to generate CRBA brain tumor mouse models.
- This protocol facilitates the creation of large cohorts of tumor-bearing mice essential for biological studies and preclinical drug screening.
- The developed PDOX models offer a valuable platform for accelerating the development of novel therapies for malignant brain tumors.
