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cephalotaxus oliveri/antimycosique
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Further studies of the norditerpene (+)-harringtonolide isolated from Cephalotaxus harringtonia var. drupacea: absolute configuration, cytotoxic and antifungal activities.
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Harringtonolide (= hainanolide) is a complex polycyclic fused norditerpene isolated from CEPHALOTAXUS HARRINGTONIA var. DRUPACEA. In spite of its appealing biological properties - we measured an IC (50) of 43 nM on KB cells and a significant antifungal activity - its absolute configuration has not
Osteoblast differentiation stimulating activity of biflavonoids from Cephalotaxus koreana.
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Six amentoflavone-type biflavonoids, bilobetin (1), ginkgetin (2), 4',7''-di-O-methyl-amentoflavone (3), 7-O-methyl-isoginkgetin (4), sciadopitysin (5), and 7,4',7'',4'''-O-methyl-amentoflavone (6), were isolated from the EtOAc fraction of Cephalotaxus koreana Nakai (Cephalotaxaceae) by
Antioxidant, antibacterial, cytotoxic, and apoptotic activity of stem bark extracts of Cephalotaxus griffithii Hook. f.
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BACKGROUND
Cephalotaxus spp. are known to possess various therapeutic potentials. Cephalotaxus griffithii, however, has not been evaluated for its biological potential. The reason may be the remoteness and inaccessibility of the habitat where it is distributed. The main aim of this study was to: (1)
Molecular modes of action of cephalotaxine and homoharringtonine from the coniferous tree Cephalotaxus hainanensis in human tumor cell lines.
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Homoharringtonine (HHT) is an ester of cephalotaxine (CET), both of which derive from the Chinese coniferous tree Cephalotaxus hainanensis. HHT inhibited tumor cell growth at molar ranges comparable to established cytostatic drugs, whereas CET was 3-4 orders of magnitude less active. Inhibition
Isolation and identification of two new compounds from the twigs and leaves of Cephalotaxus fortunei.
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Two new compounds, namely 5-hydroxy-7-methoxy-6-methylchromone (1), and sesquiterpene X (6), together with 21 known compounds were isolated from the twigs and leaves of Cephalotaxus fortunei Hook. f. The structures of 1-23 were elucidated on the basis of spectroscopic analysis (1D/2D NMR, HR-ESI-MS
Biflavone Ginkgetin, a Novel Wnt Inhibitor, Suppresses the Growth of Medulloblastoma.
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Medulloblastoma (MB) is a form of malignant brain tumor that predominantly arises in infants and children, of which approximately 25 % is due to upregulation of canonical Wnt pathway with mainly mutations in CTNNB1. Therefore, Wnt inhibitors could offer rational therapeutic strategies and
Antimicrobial and antitumor activity and diversity of endophytic fungi from traditional Chinese medicinal plant Cephalotaxus hainanensis Li.
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Endophytes from Cephalotaxus hainanensis Li, an important source of anti-leukemia drugs, have not been widely explored. In this study, 265 endophytic fungal isolates from C. hainanensis Li were screened for antimicrobial activities against tilapia, banana, rice, and rape and for antitumor activities
Mechanism of action of the antiherpesvirus biflavone ginkgetin.
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Screening of plant extracts found that a biflavone from Cephalotaxus drupacea, which was found to be ginkgetin, is active against herpes simplex virus type 1 (HSV-1). This compound caused dose-dependent inhibition of virus replication with a 50% cytotoxic activity at 12.8 micrograms/ml and 50%
Antitumor activities of harringtonine and homoharringtonine, cephalotaxus alkaloids which are active principles from plant by intraperitoneal and oral administration.
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Antitumor activities of harringtonine(HA) and homoharringtonine(HO) both belong to cephalotaxus alkaloids were compared with those of vinca alkaloids, vincristine (VCR) and vinblastine (VLB). HA and HO had significant activities against P388 leukemia, L1210 leukemia and B16 melanoma by
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