A natural cytotoxic diterpene ester
Ingenol-
1.Ogbourne, S.M., Suhrbier, A., Jones, B., et al.Antitumor activity of 3-ingenyl angelate: Plasma membrane and mitochondrial disruption and necrotic cell deathCancer Res.64(8)2833-2839(2004) 2.Gillespie, S.K., Zhang, X.D., and Hersey, P.Ingenol 3-angelate induces dual modes of cell death and differentially regulates tumor necrosis factor-related apoptosis-inducing ligand-induced apoptosis in melanoma cellsMol. Cancer Ther.3(12)1651-1658(2004) 3.Li, L., Shukla, S., Lee, A., et al.The skin cancer chemotherapeutic agent ingenol-3-angelate (PEP005) is a substrate for the epidermal multidrug transporter (ABCB1) and targets tumor vasculatureCancer Res.70(11)4509-4519(2010) 4.Hasler, C.M., Acs, G., and Blumberg, P.M.Specific binding to protein kinase C by ingenol and its induction of biological responsesCancer Res.52(1)202-208(1992) 5.Lebwohl, M., Swanson, N., Anderson, L.L., et al.Ingenol mebutate gel for actinic keratosisN. Engl. J. Med.366(11)1010-1019(2012) 6.Micali, G., Lacarrubba, F., Nasca, M.R., et al.Topical pharmacotherapy for skin cancer. Part I. PharmacologyJ. Am. Acad. Dermatol.70(6)965.e961-956.e912(2014)
Cell experiment: | KG1a cells are transiently transfected with EGFP-tagged mouse PKC-δ subcloned into pEGFP-N1 plasmid using an Amaxa nucleofection apparatus. Cells are treated with Ingenol Mebutate (0.2 μM-20 μM) 24 hours after transfection. Cell viability in EGFP-positive cells is assessed and loss of viability confirmed in the total cell culture by MTT assay after 3 days. Briefly, 24 hours after transfection, 2 × 104 cells are plated in 5 wells in 96-well plates and exposed to 0, 0.2, 2, and 20 μM Ingenol Mebutate. At 72 hours, 20 μL MTT substrate at 5 mg/mL is added and plates are incubated at 37°C. After 3 hours, 150 μL media is removed and replaced with 200 μL dimethyl sulfoxide (DMSO). Absorbance at an optical density (OD) of 550 nm is read on a plate reader and corrected for absorbance obtained from blank media controls[2]. |
参考文献: [1]. Kedei N, et al. Characterization of the interaction of ingenol 3-angelate with protein kinase C. Cancer Res. 2004 May 1;64(9):3243-55. | |
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