l arabinose/kansè

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Targeted deletion of the ara operon of Salmonella typhimurium enhances L-arabinose accumulation and drives PBAD-promoted expression of anti-cancer toxins and imaging agents.

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Tumor-specific expression of antitumor drugs can be achieved using attenuated Salmonella typhimurium harboring the PBAD promoter, which is induced by L-arabinose. However, L-arabinose does not accumulate because it is metabolized to D-xylulose-5-P by enzymes encoded by the ara operon in Salmonellae.

Bifidobacteria Expressing Tumstatin Protein for Antitumor Therapy in Tumor-Bearing Mice.

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Tumstatin (Tum) is a powerful angiostatin that inhibits proliferation and induces apoptosis of tumorous vascular endothelial cells. A nonpathogenic and anaerobic bacterium, Bifidobacterium longum (BL), selectively localizes to and proliferates in the hypoxia location within solid tumor. The aims of

Escherichia coli Nissle 1917 facilitates tumor detection by positron emission tomography and optical imaging.

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OBJECTIVE Bacteria-based tumor-targeted therapy is a modality of growing interest in anticancer strategies. Imaging bacteria specifically targeting and replicating within tumors using radiotracer techniques and optical imaging can provide confirmation of successful colonization of malignant

Cell mass-dependent expression of an anticancer protein drug by tumor-targeted Salmonella.

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Bacterial cancer therapy relies on the properties of certain bacterial species capable of targeting and proliferating within solid malignancies. If these bacteria could be loaded with antitumor proteins, the efficacy of this approach could be greatly increased. However, because most antitumor

Synthesis of a tetra- and a trisaccharide related to an anti-tumor saponin "Julibroside J28" from Albizia julibrissin.

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Simple and convergent synthesis of a tetra- and a trisaccharide portions of an antitumor compound Julibroside J(28), isolated from Albizia julibrissin, that showed significant in vitro antitumor activity against HeLa, Bel-7402 and PC-3M-1E8 cancer cell lines is reported. The tetrasaccharide has been

Synthesis and anti-cancer activity of a glycosyl library of N-acetylglucosamine-bearing oleanolic acid.

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N-Acetylglucosamine-bearing triterpenoid saponins (GNTS) were reported to be a unique type of saponins with potent anti-tumor activity. In order to study the structure-activity relationship of GNTS, 24 oleanolic acid saponins with (1 --> 3)-linked, (1 --> 4)-linked, (1 --> 6)-linked

A sodium ion concentration gradient formed during the absorption of glycine by mouse ascites-tumour cells.

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1. To deplete them of ATP the tumour cells were starved at 37 degrees in a Ringer solution containing 33m-equiv. of Na(+)/l., 131m-equiv. of Li(+)/l., 2mM-sodium cyanide and 0.1mm-ouabain. The cellular content of K(+) was largely replaced by Li(+), but cellular [Na(+)] remained near 33m-equiv./l. 2.

Extraction, Isolation, Structural Characterization and Anti-Tumor Properties of an Apigalacturonan-Rich Polysaccharide from the Sea Grass Zostera caespitosa Miki.

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An apigalacturonan (AGA)-rich polysaccharide, ZCMP, was isolated from the sea grass Zostera caespitosa Miki. The depolymerized fragments derived from ZCMP were obtained by either acidic degradation or pectinase degradation, and their structures were characterized by electrospray ionization

Novel antitumor L-arabinose derivative of indolocarbazole with high affinity to DNA.

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Novel indolocarbazole derivative 12-(alpha-L-arabinopyranosyl)indolo[2,3-alpha]pyrrolo[3,4-c]carbazole-5,7-dione (AIC) demonstrated high potency (at submicromolar concentrations) against the NCI panel of human tumor cell lines and transplanted tumors in vivo. In search of tentative targets for AIC,

Structural analysis of anti-tumor heteropolysaccharide GFPS1b from the cultured mycelia of Grifola frondosa GF9801.

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A 21-kDa heteropolysaccharide, coded as GFPS1b, was obtained from the cultured mycelia of Grifola frondosa GF9801 by hot-water extraction, ethanol precipitation, and fractioned by DEAE Sepharose Fast-flow, followed by the purification with Sephadex G-100 column chromatography using an AKTA purifier.

New clerodane diterpenoid glycosides from the aerial parts of Nannoglottis carpesioides.

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Three new clerodane diterpenoid glycosides with L-arabinose (1-3), together with ten known compounds including phytol-type diterpenes, cycloartane-type, ursane-type, and oleanane-type triterpenes, were isolated from the aerial parts of Nannoglottis carpesioides which a Chinese endemic genus. The

The biological activities of the antitumor drug Grifola frondosa polysaccharide.

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Grifola frondosa, a polypore fungus that grows at the base of trees, is an edible and medicinal mushroom with a large fruiting body characterized by overlapping caps. Japanese scholars found that Grifola frondosa polysaccharide or D-fraction is the major biologically active ingredient, which is a

Sugar effects on murine sarcoma virus transformation.

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Transformation of NIH Swiss mouse fibroblasts by a murine sarcoma virus was influenced by the type of carbohydrate in the culture medium. Exposure to D-mannose and 2-deoxy-D-glucose caused a reduction in the number of transformed colonies in vitro and tumor formation in vivo. This is a new type of

Isolation and characterization of a lectin with potentially exploitable activities from caper (Capparis spinosa) seeds.

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A dimeric 62-kDa lectin exhibiting a novel N-terminal amino acid sequence was purified from caper (Capparis spinosa) seeds. The purification protocol involved anion-exchange chromatography, cation-exchange chromatography and, finally, gel filtration by FPLC on Superdex 75. Approx. 100-fold

Triterpenoidal saponins from Hydrocotyle sibthorpioides.

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Oleanane-type triterpenoidal saponins, hydrocosisaponins A-F (1-6), along with a known saponin, hydrocotyloside VII (7), were isolated from Hydrocotyle sibthorpioides. Their structures were established on the basis of spectroscopic analyses including NMR spectroscopic techniques ((13)C, (1)H, COSY,

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