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February 1989, Vol 124, No. 2 >
ARTICLE | February 1989

The Influence of Natural Killer Cells in Neuroblastoma

John V. Reynolds, FRCS(I); Jian Shou, MD; Hoon Choi, MD; Robert Sigal, MD; Moritz M. Ziegler, MD; John M. Daly, MD
Arch Surg. 1989;124(2):235-239. doi:10.1001/archsurg.1989.01410020109018.
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• Human neuroblastoma (NRB) cell lines are markedly sensitive to natural killer (NK) cell lysis in vitro, but patients with NRBs have low or absent NK activity. This study evaluated the NK sensitivity of murine NRBs (C1300 and TBJ) in the regulation of NRB growth and determined the effects of recombinant (r) interferon gamma and recombinant interleukin 2 (rIL-2). Both basal (8%±3% specific cytotoxicity) and induced (20%±3%) NK lyses of C1300-NRB were observed. In vivo depletion of NK cells with anti–asialo GM-1 significantly enhanced growth of C1300-NRB and deceased survival. Treatment wth r–interferon gamma or rIL-2 on days 1 through 3 after C1300-NRB inoculation significantly prolonged the mean tumor latency period, decreased the tumor growth rate, and enhanced in vitro NK killing of C1300-NRB and YAC-1. The effects of R–interferon gamma and IL-2 were abrogated by pretreatment with anti–asialo GM-1. These results demonstrated that NK cells form one important component of regulation of a murine NRB, but immunomodulation with potent lymphokines requires cooperation of more than one cell type.

(Arch Surg 1989;124:235-239)

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