Development of 36 clones producing human monoclonal antibodies specific to cancer cells and their ability to inhibit cancer cell growth

Rieko Nakamura, Yoshiro Saikawa, Saiko Hosokawa, Kazumasa Fukuda, Koichiro Kumai, Tetsuro Kubota, Masaki Kitajima, Yuko Kitagawa

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Abstract

The development of a specific antibody for cancer therapy could enable a potent strategy for overcoming cancer. As ideal immunotherapy, a human monoclonal antibody (HuMoAb) might have a useful antitumor effect without any lethal toxicities. Thirty-six unique clones producing HuMoAbs were successfully developed using tumor infiltrating lymphocytes collected from 28 patients with several malignant solid tumors. The 36 tumor-specific immunoglobins were found among 9,450 clones after 43 fusions by the conventional hybridoma method. Among these 36 HuMoAbs, 9 had a remarkable tumor-specific reaction and no reaction with normal tissues, as determined with quantum dots-streptavidin and a fluorescence microscope. The inhibition of cell proliferation by the HuMoAbs was evaluated with the MTT assay. Over 40% cell growth inhibition was confirmed with 4 of the 36 HuMoAbs. Two of the antibodies had highly-specific reactivity to carcinomatous lesions with strong growth inhibition and up to 94.3% inhibition of the control growth. In conclusion, 36 clones with HuMoAbs that have specific reactions with cancer cells were successfully established. These HuMoAbs might be utilized as either anticancer or drug delivery agents.

Original languageEnglish
Pages (from-to)1651-1657
Number of pages7
JournalAnticancer research
Volume28
Issue number3 A
Publication statusPublished - 2008 May 1

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Keywords

  • Growth inhibition
  • Human monoclonal antibody
  • Hybridoma
  • Specificity to cancer cell

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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