Related Experiment Video
Updated: Jul 31, 2026
Creating Anatomically Accurate and Reproducible Intracranial Xenografts of Human Brain Tumors
Published on: September 24, 2014
Orthotopic pituitary tumors generated by stereotaxic GC cell injection in immunocompetent rats
Etienne Lefevre1,2, Fanny Chasseloup1,3, Nataly Ladurelle1
1Université Paris-Saclay, Inserm, Physiologie et Physiopathologie Endocriniennes, Le Kremlin-Bicêtre, 94275, France.
Abstract:
Innovative treatment strategies for pituitary tumors are necessary to limit the disease burden and to improve survival in cases of carcinomas. The paucity and inaccuracy of available preclinical models substantially hamper pituitary research and drug discovery. Hence, we describe a novel method to generate orthotopic pituitary tumors via stereotaxic injection of somatotroph GC cells into the pituitaries of immunocompetent Wistar Furth rats. Tumor growth was monitored by repeated 7 Tesla magnetic resonance imaging. The procedure consistently led to rapidly expanding intra- and suprasellar growth hormone-secreting tumors within their native anatomical environment. The generated tumors faithfully reproduced the microarchitecture of human somatotroph pituitary adenomas, including the immune infiltrates and other typical components of their microenvironment, which is a prerequisite for testing immunomodulating agents. This orthotopic model of proliferative pituitary tumors developed in immunocompetent hosts therefore unlocks new opportunities for preclinical studies.
Insights
Researchers developed a new preclinical model for pituitary tumors by creating orthotopic tumors in rats. This model accurately mimics human tumors, aiding drug discovery and treatment development for pituitary diseases.
Area of Science:
- Endocrinology and Oncology
- Preclinical Research Models
Background:
- Pituitary tumor research is hindered by a lack of accurate preclinical models.
- Developing effective treatments for pituitary carcinomas requires better research tools.
Purpose of the Study:
- To establish a novel orthotopic preclinical model for pituitary tumors.
- To facilitate pituitary tumor research and drug discovery.
Main Methods:
- Stereotactic injection of somatotroph GC cells into Wistar Furth rat pituitaries.
- Monitoring tumor growth using 7 Tesla magnetic resonance imaging.
- Characterizing tumor microarchitecture and microenvironment.
Main Results:
- Consistent generation of rapidly expanding intra- and suprasellar growth hormone-secreting tumors.
- Tumors accurately reproduced the microarchitecture of human somatotroph pituitary adenomas.
- Model included immune infiltrates, suitable for immunomodulating agent testing.
Conclusions:
- The novel orthotopic rat model provides a valuable tool for pituitary tumor research.
- This model supports preclinical studies of pituitary tumors in an immunocompetent host.
- Advances drug discovery for pituitary diseases and improves understanding of tumor microenvironments.
