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Prediction of anticancer activity by tumor uptake of radiolabeled monoclonal antibody
Abstract:
A novel and sensitive method is described for rapid detection of anticancer drug efficacy against human tumor xenografts in nude mice. CA or BRO human melanoma cells were inoculated i.m. in nude mice, which then were treated with saline or cytotoxic agents. After injection of 111In-labeled 9.2.27 antimelanoma monoclonal antibody, the site of tumor inoculation and the contralateral non-tumor site were excised from sacrificed mice. Relatively lower 111In uptake in the area of tumor inoculation correlated with prevention or delay of tumor growth in identically treated counterpart mice.
Insights
This study presents a new method to quickly assess anticancer drug effectiveness in human melanoma xenografts. Lower antibody uptake in tumors indicates successful drug action, preventing or delaying tumor growth in mice.
Area of Science:
- Oncology
- Immunology
- Medical Imaging
Background:
- Assessing anticancer drug efficacy is crucial for cancer treatment.
- Human tumor xenografts in nude mice are a common model for preclinical studies.
- Sensitive detection methods are needed for early evaluation of drug response.
Purpose of the Study:
- To develop and validate a novel, sensitive method for rapid detection of anticancer drug efficacy.
- To evaluate the correlation between antibody uptake and tumor growth inhibition in a preclinical model.
Main Methods:
- Human melanoma cells (CA or BRO) were inoculated into nude mice.
- Mice were treated with saline or cytotoxic agents.
- 111In-labeled antimelanoma monoclonal antibody (9.2.27) was injected.
- Tumor and non-tumor tissues were excised for analysis of 111In uptake.
Main Results:
- A novel method for rapid detection of anticancer drug efficacy was established.
- Lower 111In uptake in tumor inoculation sites correlated with tumor growth delay or prevention.
- This indicates the potential of radiolabeled antibody uptake as a biomarker for drug response.
Conclusions:
- The described method offers a sensitive and rapid approach to evaluate anticancer drug efficacy.
- Radiolabeled antibody uptake can serve as an early indicator of therapeutic response in human tumor xenografts.
- This technique aids in preclinical drug development and personalized medicine.