1986 Fiscal Year Final Research Report Summary
Identification of tumor associated antigen in cancer patient using monoclonal antibody and evaluation of biological activity of it.
Project/Area Number |
60570803
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Research Category |
Grant-in-Aid for General Scientific Research (C)
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Allocation Type | Single-year Grants |
Research Field |
Obstetrics and gynecology
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Research Institution | Hyogo College of Medicine |
Principal Investigator |
ISOJIMA Shinzo Department of Obstetrics and Gynecology Hyogo College of Medicine, 医学部, 教授 (90068403)
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Co-Investigator(Kenkyū-buntansha) |
TSUJI Yoshiyuki Department of Obstetrics and Gynecology Hyogo College of Medicine, 医学部, 助手 (60148658)
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Project Period (FY) |
1985 – 1986
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Keywords | Monoclonal antibody / Blood Group antigen H / endometrial Carcinoma / 子宮内膜癌 / H抗原 |
Research Abstract |
An IgM class monoclonal antibody (Mab) was produced by immunizing BALB/C mice with a human endometrial carcinoma cell line. This Mab, designated as Mab-C12, exhibited strong reactivity against endometrial carcinoma, but much less reactivity against normal endometria. The antigen recognized by Mab-C12 (C12-Ag) was detected by radiometric assay in the sera of patients with various carcinomas, but not in the sera of patients without carcinomas or of normal individuals. Mab-C12 was found to agglutinate type O red blood cells ( <gamma> , b, c), but not type A, B, or AB <gamma> , b, c. To assess the carbohydrate specificity to Mab-C12, tissue stainings were performed using Mab-C12, Ulex europaeus lectin I, and a monoclonal anti-H antibody. In tissues of endometrial carcinoma, the amount of both H and C12-Ags increased, but the increase of C12-Ag was extremely high, compared with the H antigen. The C12-Ag was not generally found in the endothelial cells of blood type O patients. In sera, the levels of H antigen were various and depended on the host's blood type. The H antigen was not valuable as a tumor-associated serum marker, because sera from blood type O individuals indicated higher levels of the H antigen than those with blood type A or B. But the C12 antigen in sera was not influenced by ABO blood group of patients. From these results, it was concluded that the Mab C12 was a unique Mab which reacted with an H-like antigen in the sera of patients with carcinomas, irrespective of ABO blood group. The Mab C12 may have an important role to detect on tumor marker of cancer patients.
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Research Products
(8 results)