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Antitumor effect and structure-activity relationship of asterriquinone analogs
Abstract:
Asterriquinone (ARQ), a metabolic product from Aspergillus terreus IFO 6123, showed an inhibitory effect on some transplantable animal tumors, Ehrlich carcinoma, ascites hepatoma AH13 and mouse P388 leukemia, but had little or no effect on Yoshida sarcoma, ascites hepatoma AH109A and mouse L1210 leukemia. ARQ also inhibited the growth of HeLa cells in monolayer culture. Although metabolic products from Aspergillus terreus var. africanus IFO 8835 were almost ineffective against Ehrlich carcinoma, some chemically modified ARQ-like compounds were found to have potent inhibitory activity against the growth of the carcinoma in mice. The presence of free hydroxyl groups in the benzoquinone moiety and the number and position of tert-, iso-pentenyl, or both pentyl groups seem to be important in relation to the antitumor activity.
Insights
Asterriquinone (ARQ), a fungal metabolite, demonstrated significant antitumor activity against specific mouse tumors and HeLa cells. Chemical modifications of ARQ enhanced its efficacy against Ehrlich carcinoma in mice.
Area of Science:
- Biochemistry
- Pharmacology
- Mycology
Background:
- Asterriquinone (ARQ) is a metabolic product isolated from Aspergillus terreus.
- Certain fungal metabolites exhibit potential as anticancer agents.
Purpose of the Study:
- To evaluate the antitumor activity of Asterriquinone (ARQ).
- To investigate the structure-activity relationship of ARQ and its derivatives against various tumors.
Main Methods:
- In vitro testing against HeLa cells.
- In vivo testing against transplantable animal tumors (Ehrlich carcinoma, AH13, P388 leukemia, Yoshida sarcoma, AH109A, L1210 leukemia).
- Chemical modification of ARQ and evaluation of derivative efficacy.
Main Results:
- ARQ inhibited Ehrlich carcinoma, AH13, P388 leukemia, and HeLa cell growth.
- ARQ showed minimal effect on Yoshida sarcoma, AH109A, and L1210 leukemia.
- Chemically modified ARQ analogs exhibited potent antitumor activity against Ehrlich carcinoma in mice.
Conclusions:
- ARQ possesses selective antitumor properties.
- Structural features, including hydroxyl groups and alkyl side chains on the benzoquinone moiety, are crucial for ARQ's antitumor activity.
- Modified ARQ compounds represent promising candidates for cancer chemotherapy.