Anticancer effect of a Kampo preparation Daikenchuto

Area of Science:

• Oncology
• Pharmacology
• Herbal Medicine

Background:

• Traditional Japanese Kampo medicine offers a potential alternative for cancer therapy with fewer side effects.
• Existing research lacks comprehensive evaluation of specific Kampo preparations like Daikenchuto (DKT) for antitumor activity.

Purpose of the Study:

• To evaluate the antitumor efficacy of Daikenchuto (DKT) against various cancer cell lines.
• To investigate the underlying mechanisms of DKT's action, including apoptosis induction.
• To identify potential antitumor factors within DKT's ingredients, specifically Japanese Zanthoxylum peel.

Main Methods:

• In vitro MTT assays were used to assess tumor growth inhibition in breast, esophageal, gastric, and colon cancer cells treated with DKT.
• Apoptotic changes in cancer cells post-DKT treatment were analyzed.
• A nude mouse model of gastric cancer was employed to evaluate DKT's effect on tumor growth and peritoneal dissemination following oral administration.
• Individual DKT ingredients and other Kampo preparations were tested for comparative antitumor effects.

Main Results:

• DKT demonstrated significant antitumor effects across gastric, breast, esophageal, and colon cancer cell lines.
• DKT treatment effectively induced apoptosis in the tested cancer cells.
• Oral administration of DKT showed a trend towards reduced gastric cancer growth and a significant reduction in peritoneal dissemination in nude mice.
• Japanese Zanthoxylum peel, an ingredient of DKT, exhibited a particularly potent antitumor effect.

Conclusions:

• Daikenchuto (DKT) is a promising Kampo preparation with demonstrated antitumor activity against various cancers.
• DKT's mechanism involves the induction of apoptosis in cancer cells.
• Japanese Zanthoxylum peel contains a significant antitumor factor, highlighting its therapeutic potential within DKT.