Abstract:
:Monoclonal antibodies (McAbs) to pancreatic cancer were developed by fusing SP2/0 cells and splenocytes from Balb/c mice immunized with CH-2 cells. The specific binding rates of McAb P1 and P2 were 40.1 and 43.8%, respectively, shown by binding radioreactivity assay in vitro, which were in sharp contrast with those of control groups (p < 0.05). The biodistribution of radioiodinated McAb P2 was studied by measuring parameters of tumor-specific radioreactivity in nude mice bearing CH-2 tumors. The ratios of tumors to nontumors were all > 2 at 48 h. The localization index of cancer and the ratio of tumor to pancreas were 4.05 and 4.16, respectively, at 72 h. Therefore, 131I-McAbs may be useful for radioimmunoimaging (RII) of pancreatic cancer. After intraperitoneal injection of 131I-McAb P2 into tumor-bearing nude mice, imaging of xenograft pancreatic cancer became increasingly distinct with the nonspecific background fading, especially in the period of 72-96 h. Examination of pancreatic cancer tissues by immunohistochemical methods revealed that McAb P2 was strongly positive (86%) in comparison with other tumors and normal tissues. The results demonstrated that clinical RII of pancreatic cancer was feasible with McAb P2.
journal_name
Pancreasjournal_title
Pancreasauthors
Yao CZ,Poston GJ,Ishizuka J,Townsend CM Jr,Thompson JCdoi
10.1097/00006676-199305000-00002subject
Has Abstractpub_date
1993-05-01 00:00:00pages
289-94issue
3eissn
0885-3177issn
1536-4828journal_volume
8pub_type
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