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Blood, 1 April 2002, Vol. 99, No. 7, pp. 2512-2517
IMMUNOBIOLOGY
Immunization against murine multiple myeloma with fusions of
dendritic and plasmacytoma cells is potentiated by interleukin
12
Jianlin Gong,
Shigeo Koido,
Dongshu Chen,
Yasuhiro Tanaka,
Lei Huang,
David Avigan,
Kenneth Anderson,
Tsuneya Ohno, and
Donald Kufe
From the Dana-Farber Cancer Institute, Harvard Medical
School, Boston, MA; and the Department of Microbiology, Jikei
University School of Medicine, Tokyo, Japan.
Fusions of cancer cells and dendritic cells (DCs) are
effective in the treatment of animal tumor models and patients with metastatic renal carcinoma. In this study, we have fused DCs with mouse
4TOO plasmacytoma cells. The results demonstrate that vaccination of
mice with the fusion cells (FC/4TOO) is associated with induction of
antitumor humoral and cytotoxic T lymphocyte (CTL) responses. Immunization with FC/4TOO cells protected mice against tumor challenge. In addition, treatment of established multiple myeloma with FC/4TOO cells was associated with prolongation of survival but not with eradication of disease. As interleukin (IL)-12 potentiates the induction of immune responses, recombinant mouse IL-12 was administered with the FC/4TOO vaccine. Treatment of mice with FC/4TOO and IL-12 was
associated with increased CTL activity and T-cell proliferation responses. Treatment with FC/4TOO and IL-12 also resulted in
eradication of established disease. These findings demonstrate that
immunization with FC/4TOO fusion cells and IL-12 potentiates antitumor
immunity and the treatment of murine multiple myeloma.

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