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Jang R. Liu,김석원,유욱준,정순천,Sung Hee Ban,Hwa-Jee Chung,Suk Min Ko 한국생물공학회 2007 Biotechnology and Bioprocess Engineering Vol.12 No.6
When whole cell extracts are subjected to proton nuclear magnetic resonance spectroscopy (1H NMR), metabolite profiles are generated that contain overlapping signals of the majority of compounds within the extract. In order to determine whether pattern recognition based on the metabolite profiles of higher plants is able to genetically discriminate between plants, we analyzed leaf samples of eight cultivars of Catharanthus roseus by 1H NMR. Hierarchical dendrograms, based on the principal component analysis of the 1H NMR total, aliphatic, carbohydrate, and aromatic region data, revealed possible relationships between the cultivars. The dendrogram based on the aromatic region data was in general agreement with the genetic relationships determined by conventional DNA fingerprinting methods. Secologanin and polyphenols were assigned to the signals of the 1H NMR spectra, and contributed most profoundly to the discrimination between cultivars. The overall results indicate that the genetic relationships between C. roseus cultivars are reflected in the differences of the aromatic compounds in the leaves.
Liu, Haidan,Hwang, Joonsung,Li, Wei,Choi, Tae Woong,Liu, Kangdong,Huang, Zunnan,Jang, Jae-Hyuk,Thimmegowda, N.R.,Lee, Ki Won,Ryoo, In-Ja,Ahn, Jong-Seog,Bode, Ann M.,Zhou, Xinmin,Yang, Yifeng,Erikson, American Association for Cancer Research 2014 CANCER PREVENTION RESEARCH Vol.7 No.1
<P>Mitogen- and stress-activated kinase 1 (MSK1) is a nuclear serine/threonine protein kinase that acts downstream of both extracellular signal-regulated kinases and p38 mitogen-activated protein kinase in response to stress or mitogenic extracellular stimuli. Increasing evidence has shown that MSK1 is closely associated with malignant transformation and cancer development. MSK1 should be an effective target for cancer chemoprevention and chemotherapy. However, very few MSK1 inhibitors, especially natural compounds, have been reported. We used virtual screening of a natural products database and the active conformation of the C-terminal kinase domain of MSK1 (PDB id 3KN) as the receptor structure to identify chrysin and its derivative, compound 69407, as inhibitors of MSK1. Compared with chrysin, compound 69407 more strongly inhibited proliferation and 12-<I>O</I>-tetradecanoylphorbol-13-acetate (TPA)-induced neoplastic transformation of JB6 P+ cells with lower cytotoxicity. Western blot data demonstrated that compound 69407 suppressed phosphorylation of the MSK1 downstream effector histone H3 in intact cells. Knocking down the expression of MSK1 effectively reduced the sensitivity of JB6 P+ cells to compound 69407. Moreover, topical treatment with compound 69407 before TPA application significantly reduced papilloma development in terms of number and size in a two-stage mouse skin carcinogenesis model. The reduction in papilloma development was accompanied by the inhibition of histone H3 phosphorylation at Ser10 in tumors extracted from mouse skin. The results indicated that compound 69407 exerts inhibitory effects on skin tumorigenesis by directly binding with MSK1 and attenuates the MSK1/histone H3 signaling pathway, which makes it an ideal chemopreventive agent against skin cancer. <I>Cancer Prev Res; 7(1); 74–85. ©2013 AACR</I>.</P>
Min, Sung R.,Yang, Seung G.,Liu, Jang R.,Choi, Pil S.,Soh, Woong Y. 全北大學校 基礎科學硏究所 1994 基礎科學 Vol.16 No.-
Culture conditions for high frequency somatic embryogenesis and plant regeneration from cotyledonary explants of Codonopsis lanceolata are described. The maximum induction frequency of somatic embryos from cotyledonary explants was 80% on Murashige and Skoog (MS) medium containing 6% sucrose with 1 mg/l 2.4-dichlorophenoxyacetic acid and 10 % coconut water. Upon transfer onto MS basal medium containing 3% sucrose, most somatic embryos developed into plantlets.