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Transplantation of human renal carcinomas into athymic mice
Abstract:
Thirty-one primary human renal carcinomas were transplanted into athymic mice of which ten produced tumors in the mouse host. Only tumors with a nuclear grade of 3 or 4 were successfully transplanted. The nuclear grades of the human tumor and transplant were similar; however, the cellular histology often varied. Patient prognosis appeared to be inversely related to successful tumor transplantation. In the transplant group, the 1-year survival was 30% in contrast to a 1-year survival of 83% among patients with renal cancers of similar stage and grade which did not produce tumors in the mice.
Insights
Successful transplantation of human renal cell carcinoma into mice correlated with poorer patient survival. This finding suggests that tumor growth in mice may indicate a more aggressive cancer in humans.
Area of Science:
- Oncology
- Cancer Biology
- Xenograft Models
Background:
- Renal cell carcinoma (RCC) is a significant cause of cancer-related mortality.
- Establishing reliable preclinical models is crucial for understanding RCC progression and developing new therapies.
- Tumor xenografts in immunocompromised mice are widely used for cancer research.
Purpose of the Study:
- To evaluate the feasibility of transplanting primary human renal cell carcinomas into athymic mice.
- To investigate the relationship between successful xenograft formation and patient prognosis.
- To compare the characteristics of human tumors and their corresponding mouse xenografts.
Main Methods:
- Thirty-one primary human renal cell carcinomas were orthotopically transplanted into athymic mice.
- Tumor take and growth were monitored.
- Nuclear grade and cellular histology of human tumors and successful xenografts were compared.
- Patient survival data was analyzed in relation to successful transplantation.
Main Results:
- Ten out of thirty-one (32%) primary human renal carcinomas successfully formed tumors in athymic mice.
- Only tumors with high nuclear grade (3 or 4) were successfully transplanted.
- While nuclear grade was preserved, cellular histology often differed between the primary tumor and the xenograft.
- Patients whose tumors successfully formed xenografts had significantly poorer 1-year survival (30%) compared to those whose tumors did not (83%).
Conclusions:
- Successful xenografting of human renal cell carcinoma in athymic mice is achievable, particularly for high-grade tumors.
- Successful tumor transplantation is inversely correlated with patient prognosis, suggesting a potential indicator of aggressive disease.
- This xenograft model may serve as a valuable tool for studying aggressive renal cell carcinoma and testing therapeutic strategies.