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Recombinant Monoclonal Antibodies, from Tumor Targeting to Cancer Immunotherapy: A Critical Overview.

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Summary of "Recombinant Monoclonal Antibodies, from Tumor Targeting to Cancer Immunotherapy: A Critical Overview."

In view of the explosion of the present clinical use of monoclonal antibodies (mAbs), not only in the treatment of cancer, but also of autoimmune diseases, I was asked to review the development of mAbs in tumor diagnosis and therapy, with some illustrations of our own contribution in the field. The initial use of radiolabeled mAbs for tumor targeting and radioimmunotherapy led to the extensive clinical application of unlabeled, "humanized" mAbs for cancer therapy, which I describe with a critical perspective. The introduction of recombinant bispecific antibodies, capable of bridging T lymphocytes with tumor cells and inducing killing of the cancer cells, was found to be mostly active in the treatment of hematological malignancies. Most interestingly, the use of mAbs not directed to the tumor cells, but to inhibitory receptors expressed by cytotoxic T lymphocytes, which trigger them to kill the cancer cells, represents a new form of active cancer immunotherapy. My motivation in writing this review was related to my long-term interactions with several Russian scientists, mentioned at the end of this article.

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This article was published in the following journal.

Name: Molekuliarnaia biologiia
ISSN: 0026-8984
Pages: 1024-1038

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Medical and Biotech [MESH] Definitions

Form of adoptive transfer where cells with antitumor activity are transferred to the tumor-bearing host in order to mediate tumor regression. The lymphoid cells commonly used are lymphokine-activated killer (LAK) cells and tumor-infiltrating lymphocytes (TIL). This is usually considered a form of passive immunotherapy. (From DeVita, et al., Cancer, 1993, pp.305-7, 314)

Antibodies, often monoclonal, in which the two antigen-binding sites are specific for separate ANTIGENIC DETERMINANTS. They are artificial antibodies produced by chemical crosslinking, fusion of HYBRIDOMA cells, or by molecular genetic techniques. They function as the main mediators of targeted cellular cytotoxicity and have been shown to be efficient in the targeting of drugs, toxins, radiolabeled haptens, and effector cells to diseased tissue, primarily tumors.

Lymphocytes that show specificity for autologous tumor cells. Ex vivo isolation and culturing of TIL with interleukin-2, followed by reinfusion into the patient, is one form of adoptive immunotherapy of cancer.

Carbohydrate antigens expressed by malignant tissue. They are useful as tumor markers and are measured in the serum by means of a radioimmunoassay employing monoclonal antibodies.

Testing of immune status in the diagnosis and therapy of cancer, immunoproliferative and immunodeficiency disorders, and autoimmune abnormalities. Changes in immune parameters are of special significance before, during and following organ transplantation. Strategies include measurement of tumor antigen and other markers (often by RADIOIMMUNOASSAY), studies of cellular or humoral immunity in cancer etiology, IMMUNOTHERAPY trials, etc.

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