| 摘要 |
An inhibitor against TGF-alpha expression and an inhibitor against transformation of a hepatitis and/or cirrhosis cell which comprise as an active ingredient a polyprenyl compound such as a polyprenyl carboxylic acid (for example, 3,7,11,15-tetramethyl-2,4,6,10,14-hexadecapentaenoic acid). The inhibitor can be used as an inhibitor against onset, recurrence (second oncogenesis), and malignant alteration of carcinoma in a liver.
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