Antitumor Effect Of Bismuth-conjugated Anti-IL-2R Monoclonal Antibody(2E4) on a IL-2 Receptor Positive Tumor EL4J3.4

  • Kim, Sung-Hoon (Oriental Medical College, TaeJon University) ;
  • Robert-W. Kozak (Work Miles Inc. Regulatory Affairs) ;
  • Chung, Kyeong-Soo (College of Pharmacy, Chungnam National University) ;
  • Ahn, Byung-Zun (College of Pharmacy, Chungnam National University)
  • Published : 1994.06.01

Abstract

The antitumor effects of the 2E4 and anti--Tac, monoclonal antibodies directed to Il-2 receptor (IL-2R) conjugated with .alpha.-particle emitting radionuclide bismuth-212., were compared. The $^{212}Bi-2E4$ demonstratedspecific cytotocicity to EL4J3, 4, a I$L-2R^+$ cell line, than to EL4J, a $IL-2R^-$ cell line in thymidine incorporation assy. TEX>$^{212}Bi-2E4$ exerted the maximal antitumor effect in that % T/C in C57BL/6 mice implanted with EL4J3.4 ascitic tumor was 331% at the concentration of $50{\;}{\mu}Ci$, while that of $^{212}Bi-anti-Tac$ was 258% at $100{\;}{\mu}Ci$.

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