Cucurbitane-type Triterpenes from Citrullus Lanatus (Watermelon) Seeds

Author:

Kikuchi Takashi1,Okada Rina1,Harada Yu1,Ikushima Kenji1,Yamakawa Takahiro1,Yamada Takeshi1,Tanaka Reiko1

Affiliation:

1. Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan

Abstract

Two new cucurbitane-type triterpenes, 24-hydroperoxycucurbita-5,25-dien-3β-ol (1) and 25-hydroperoxycucurbita-5,23-dien-3β-ol (2), were isolated from a MeOH extract of Citrullus lanatus seeds. Compounds 1 and 2 exhibited moderate cytotoxic activities with IC50 values of 33.4–52.4 μM against HL-60 (human leukemia), P388 (murine leukemia), and L1210 (murine leukemia) cells. Compound 1 showed melanogenesis inhibitory activity (melanin content 80.0 %) with low cytotoxicity (cell viability 97.6 %) at a low concentration (10 μM).

Publisher

SAGE Publications

Subject

Complementary and alternative medicine,Plant Science,Drug Discovery,Pharmacology,General Medicine

Reference10 articles.

1. Chuyakudaijiten, Vol. II. (1985) Shanghai Scientific and Technical Publishers, Shogakukan Inc., Tokyo. 1374–1375.

2. OkadaM. (Ed.), (2002) Newly Revised Illustrated Medicinal Plants of World. Hokuryukan Pablishing Co., Ltd., Tokyo, p. 512.

3. Die cucurbitacine von Citrullus lanatus var. citroides

4. Novel 29-nor-3,4-seco-cycloartane triterpene methyl esters from the aerial parts of Antirhea acutata

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