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Modulation of human tumor antigen expression.

J W Greiner, P H Hand, D Colcher

The Journal of Laboratory and Clinical Medicine

|March 1, 1987

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Researchers developed monoclonal antibodies (MAbs) targeting breast cancer antigens. These antibodies help study tumor antigen expression and localization, showing potential for targeted therapies and diagnostics in breast carcinoma detection.

Area of Science:

Immunology
Oncology
Biotechnology

Background:

Monoclonal antibodies (MAbs) are crucial tools in cancer research.
Identifying specific tumor antigens is key for targeted therapies.
Understanding antigen expression variability is important for effective treatment.

Purpose of the Study:

Generate and characterize MAbs against breast carcinoma antigens.
Investigate factors influencing tumor antigen expression.
Evaluate the potential of radiolabeled MAbs for tumor targeting.

Main Methods:

Immunization with human metastatic breast tissue to produce MAbs.
Immunohistochemistry and flow cytometry to assess MAb reactivity.
Radioimmunoassay to analyze antigen expression modulation by interferon.

Related Experiment Videos

Xenograft models in athymic mice to study radiolabeled MAb localization.

Main Results:

Generated MAbs, including B72.3, with selective reactivity for carcinomas.
Demonstrated heterogeneity in tumor antigen expression.
Showed that interferon increases surface antigen expression on carcinoma cells.
Confirmed active uptake of radiolabeled MAb B6.2 by human breast tumors in vivo.

Conclusions:

MAbs are effective immunologic probes for studying breast tumor antigens.
Tumor antigen expression is influenced by cellular factors and external regulators like interferon.
Radiolabeled MAbs show promise for localizing and potentially treating human tumors grown in vivo.