CLINICAL TRIALS WITH RADIOLABELED ANTIBODIES

放射性标记抗体的临床试验

• 批准号: 4691891
• 负责人: J SCHLOM
• 金额: --
• 依托单位: DIVISION OF CANCER BIOLOGY AND DIAGNOSIS
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/4691891
• 关键词: carcinoma; human subject; immunoconjugates; immunoglobulin G; immunoglobulins; immunotherapy; monoclonal antibody; neoplasm /cancer immunodiagnosis; neoplasm /cancer radionuclide diagnosis; radiotracer; rectum neoplasms; toxin; tumor antigens

Accurate detection and anatomic localization of both primary and metastatic lesions remains one of the major problems in the management of most human carcinomas. We have recently initiated clinical trials at the NIH Clinical Center to detect and localize colorectal carcinoma lesions using radiolabeled MAb B72.3. Parameters that will be systematically investigated concerning both the efficiency of MAb localization and the efficiency of gamma scanning of carcinoma lesions include: (a) effect of MAb dose and specific activity of radionuclide coupled MAb; (b) comparison of the use of intact IgG, F(ab')2, and Fab'; (c) choice of radionuclide; (d) route of inoculation; (e) size, location, and other inherent properties of the tumor mass such as antigen content; (f) the presence of circulating antigen; (g) the presence and/or absence of human anti-murine Ig antibodies; (h) metabolism of MAb and fragments; (i) combiantions of MAbs. It is hoped that these studies will also aid in establishing a rational basis for the subsequent therapeutic use of a particular MAb, either coupled to toxins, via effector cell-mediated or complement-mediated mechanisms, or using MAbs radiolabeled with one of a variety of isotopes. This latter goal can be accomplished by direct analyses of biopsy material (both tumor and normal tissues) from patients receiving radiolabeled MAb to define the "radiolocalization index" or potential "therapeutic index" (i.e., the ratio of the amount of MAb bound [via cpm] per gram of tumor tissue to that bound per gram of normal tissues).

原发和转移的准确检测和解剖定位