Volume 38, Issue 6 pp. 859-865
Experimental Cancer
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Plant-derived diterpene esters enhance HTLV-I-induced colony formation of lymphocytes in co-culture

Shuichi Matsuda

Shuichi Matsuda

The Third Division, Department of Medicine, Kobe University School of Medicine, Kobe 650

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Yoshinobu Nakao

Corresponding Author

Yoshinobu Nakao

The Third Division, Department of Medicine, Kobe University School of Medicine, Kobe 650

The Third Division, Department of Medicine, Kobe University School of Medicine, Kobe 650Search for more papers by this author
Hajime Ohigashi

Hajime Ohigashi

Department of Food Science and Technology, Faculty of Agriculture, Kyoto University, Kyoto 606

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Koichi Koshimizu

Koichi Koshimizu

Department of Food Science and Technology, Faculty of Agriculture, Kyoto University, Kyoto 606

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Yohei Ito

Yohei Ito

Department of Microbiology, Faculty of Medicine, Kyoto University, Kyoto 606, Japan

Died on July 26, 1985.

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First published: 15 December 1986
Citations: 12

Abstract

The addition to culture dishes of 10–50 ng/ml of the essential diterpene ester of Sapium sebiferum, 12-O-hexadecanoylphorbol-13-acetate (HPA), increased colony formation of normal peripheral blood lymphocytes co-cultured with γ-irradiated HTLV-1-producing HUT102 cells. The cells in the stimulated colonies showed an approximately 3-fold increase in the expression of interleukin-2 (IL-2) receptors and a 1.5-to 2.0-fold increase in human T-lymphotropic virus type-I (HTLV-I) p19-positive cells. This biological potency was analogous to that induced by the most potent tumor promoter 12-O-tetradecanoylphorbol-13-acetate (TPA) and stronger than that of 12-O-hexade-canoyl-16-hydroxyphorbol-13-acetate (HHPA) isolated from Aleurites fordii.

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