Xiao-Peng Wu

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OBJECTIVE To investigate the effects of mifepristone, a progesterone receptor (PR) antagonist, through the proliferation of human cholangiocarcinoma cell line FRH-0201 in vitro and the possible mechanisms involved. METHODS A two-step addition of poly-HRP anti-mouse immunoglobulin G detection system was used to detect the expression of PR in FRH-0201(More)
Mangrove, a kind of special host plants, is a resource of abundant endophytic fungi. More than 200 species of endophytic fungi are isolated and identified from mangrove, being the second largest community of marine fungi. The reported endophytic fungi of mangrove are mainly Alternaria, Aspergillus, Cladosporium, Colletotrichum, Fusarium, Paecilomyces,(More)
Integrins play an important role in tumor metastasis induced by vascular endothelial growth factor (VEGF). However, in the case of gastric cancer, the precise role of VEGF in regulating integrin alphavbeta6 is unclear. In this study, we found that most of the alphavbeta6 integrin-positive gastric cancer tissues were also VEGF-positive. Furthermore, when(More)
The enhanced reactivity exhibited by six pseudo-alpha-bases, RC[triple bond]CZ(-) (R = H and Cl; Z = O, S, and Se) in gas-phase E2 reactions with ethyl chloride was examined at the G2(+) level. It is found that anomalous reactivity is observed despite the fact that these chalcogen bases do not possess adjacent lone-pair electrons. The influence of the(More)
The reactivity order of 12 anions toward ethyl chloride has been investigated by using the G2(+) method, and the competitive E2 and SN2 reactions are discussed and compared. The reactions studied are X(-) + CH3CH2Cl → HX + CH2═CH2 + Cl(-) and X(-) + CH3CH2Cl → CH3CH2X + Cl(-), with X = F, Cl, Br, HO, HS, HSe, NH2 PH2, AsH2, CH3, SiH3, and GeH3. Our results(More)
BACKGROUND A diverse range of cytogenetic alterations of autosomal chromosomes has been reported to date. However, few studies have addressed the abnormalities of X chromosome in hepatocellular carcinoma (HCC) except sporadic reports on the deletion of band F1 in X chromosome, and the clonal analysis of methylation pattern of the X chromosome-linked human(More)
The water-catalyzed hydrolysis reaction of carbon disulfide (CS(2)) has been investigated at the levels of HF and MP2 with the basis set of 6-311++G(d,p) using the combined supramolecular/continuum models, in which up to six water molecules are involved in the hydrolysis and the effect of water bulk solvent is taken into account according to the polarizable(More)
A new ursane-type triterpene, cymosic acid (1) together with two known compounds, 3β,19α-dihydroxy-2-oxo-12-ursen-28-oic acid (2) and 2α,19α-dihydroxy-3-oxo-12-ursen-28-oic acid (3), were isolated from Rosa cymosa Tratt. The structure of compound 1 was elucidated by analyzing its ¹H and ¹³C NMR, ¹H-¹H COSY, HSQC, HMBC, NOESY, and HR-ESI-MS values. The three(More)
The detailed reaction pathways for the hydration of ketenimine by water and water clusters containing up to five explicit water molecules (CH(2) =C=NH + (n + 1)H(2)O --> CH(3)CONH(2) + nH(2)O, n = 0-4) in the gas phase have been investigated by the MP2 method in conjunction with the 6-31+G* and 6-311++G** basis sets, and the effects of bulk solvent are(More)
Four pentacyclic triterpenoids were obtained from the leaves of Combretum oliviforme Chao, 3beta-hydroxyolean-12-en-28-oic acid (1), 23-O-[alpha-L-(4'-acetylrhamnopyranosyl)]-imberbic acid (2), 23-acetoxy-3beta-acetylimberbic acid-29-methyl ester (3), and 23-O-[alpha-L-rhamnopyranosyl]-1,3beta-diacetylimberbic acid (4). Hydrolysis of 2 and 4 gave(More)