Radioimmunoimaging of xenograft pancreatic cancer with131I-monoclonal antibody P2

Chong Zheng Yao, Graeme J. Poston, Jin Ishizuka, Courtney M. Townsend, James C. Thompson

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Monoclonal antibodies (McAbs) to pancreatic cancer were developed by fusing SP2/0 cells and spleno-cytes from Balb/c mice immunized with CH-2 cells. The specific binding rates of McAb PI 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 radioio-dinated 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-% 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.

Original languageEnglish (US)
Pages (from-to)289-294
Number of pages6
JournalPancreas
Volume8
Issue number3
DOIs
StatePublished - May 1993

Keywords

  • Localization index
  • Monoclonal antibody
  • Pancreatic cancer
  • Radioimmunoimaging
  • Tumor/nontumor ratio
  • Xenograft tumor

ASJC Scopus subject areas

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism
  • Hepatology
  • Endocrinology

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