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oligosaccharide/cancro
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Pagina 1 a partire dal 621 risultati
Anti-tumor-promoting activities of agaro-oligosaccharides on two-stage mouse skin carcinogenesis.
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We have previously reported that agaro-oligosaccharides (AGOs) suppressed the elevated levels of nitric oxide (NO), prostaglandin E₂(PGE₂), and pro-inflammatory cytokines in activated monocytes/macrophages, via heme oxygenase-1 induction. In this report, we initially demonstrated that AGOs intake
The use of HA oligosaccharide-loaded nanoparticles to breach the endogenous hyaluronan glycocalyx for breast cancer therapy.
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Breast cancer is characterized by a stromal microenvironment consisting of highly abundant hyaluronan (HA). The role of the HA-coat as a 'fortress' fencing off tumor cells from drugs applied in the circulation has been largely neglected by previous research efforts. In this study we demonstrated
Specific interaction between an oligosaccharide on the tumor cell surface and the novel antitumor agents, sulfoquinovosylacylglycerols.
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Some sulfoquinovosylacylglycerols (SQAG) have been shown to be potent DNA polymerase inhibitors, and to have strong antitumor activity in vivo. In this study, we investigated the mode of action of SQAG with regard to the interaction with the tumor cell surface. Of the SQAG used, the monoacyl forms
Structures of the oligosaccharide chains of two forms of alpha 1-acid glycoprotein purified from liver metastases of lung, colon, and breast tumors.
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Two forms of alpha 1-acid glycoprotein with common immunological determinants and almost identical amino acid compositions but different amounts of carbohydrate were isolated from liver metastases of primary colon, lung, and breast tumors by extraction with perchloric acid, gel filtration on
Secreted glycoproteins of human kidney tumour cells contain sulphated complex-type oligosaccharides.
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Human kidney tumour cells in culture incorporated [3H]glucosamine and 35SO4 into glycoprotein products, which were secreted into the culture medium. The effects of sodium butyrate, a known differentiation-inducing agent, on the production of these sulphated glycoproteins were studied. Cells were
The marine-derived oligosaccharide sulfate (MdOS), a novel multiple tyrosine kinase inhibitor, combats tumor angiogenesis both in vitro and in vivo.
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Despite the emerging success of multi-targeted protein tyrosine kinase (PTK) inhibitors in cancer therapy, significant side effects and resistance concerns seems to be avoided unlikely. The aim of the present study was to identify novel multi-targeting PTK inhibitors. The kinase enzymatic activities
Colorectal cancer and the intake of nutrients: oligosaccharides are a risk factor, fats are not. A case-control study in Belgium.
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A case-control study was carried out in the populations of two Belgian provinces that differed in food consumption habits, particularly fat intake. There were 453 colonic and 365 rectal cancer cases and 2,851 population controls. There were no significant differences in the average intake of the
Abrogating drug resistance in malignant peripheral nerve sheath tumors by disrupting hyaluronan-CD44 interactions with small hyaluronan oligosaccharides.
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Malignant peripheral nerve sheath tumors (MPNST) develop in approximately 10% of neurofibromatosis type-1 patients and are a major contributing factor to neurofibromatosis-1 patient mortality and morbidity. MPNSTs are multidrug resistant, and thus long-term patient survival rates are poor after
Monoclonal antibody recognizing a determinant on type 2 chain blood group A and B oligosaccharides detects oncodevelopmental changes in azoxymethane-induced rat colon tumors and human colon cancer cell lines.
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Altered expression of ABH blood group substances is a common feature of human colorectal carcinoma, yet it remains unclear how these structural changes influence the biological properties of tumor cells. Azoxymethane-induced rat colon tumors display many features of the human disease, thereby
Biosynthesis of bi-, tri-, and tetraantennary oligosaccharides containing alpha-D-galactosyl residues at their nonreducing termini. Branch specificity of the Ehrlich tumor cell alpha(1,3)-galactosyltransferase.
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The ability of Ehrlich tumor cell alpha(1,3)-galactosyltransferase to catalyze the incorporation of alpha-D-Gal residues into a specific branch of bi-, tri-, and tetraantennary oligosaccharides has been investigated by acetolysis followed by gel filtration of the fragments on Bio-Gel P-4. Taking
Differences in expression of oligosaccharide determinants by phenotypically distinct sublines of the Dunning 3327 rat prostate cancer.
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Oligosaccharides expressed by the 3327-H and 3327-MAT LyLu sublines of the Dunning rat prostate cancer model have been compared in formalin-fixed and routinely paraffin-embedded tumour tissues. Binding by lectins of defined specificity has been employed to identify expression of seven
Expression of L-PHA-binding proteins in breast cancer: reconstitution and molecular characterization of beta 1-6 branched oligosaccharides in three-dimensional cell culture.
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Expression of beta 1-6 branched oligosaccharides in human breast cancer cells was investigated in vivo and in vitro. Lectin histochemical and lectin blotting analyses of surgically resected specimens were performed using L-PHA (phaseolus vulgaris leukoagglutinin) lectin, which binds to beta 1-6
Prognostic significance of reduced expression of beta-N-acetylgalactosaminylated N-linked oligosaccharides in human breast cancer.
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Our previous studies showed that expression of the GalNAcbeta1-->4GlcNAc group on N-linked oligosaccharides is associated with functional differentiation of the bovine mammary gland. In the present study, the occurrence of the GalNAcbeta1-->4GlcNAc group was established in human milk proteins and
Biocompatible Chitosan Oligosaccharide Modified Gold Nanorods as Highly Effective Photothermal Agents for Ablation of Breast Cancer Cells.
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Photothermal therapy (PTT) using biocompatible nanomaterials have recently attracted much attention as a novel candidate technique for cancer therapy. In this work we report the performance of newly synthesized multidentate chitosan oligosaccharide modified gold nanorods (AuNRs-LA-COS) as novel
Different class I antigen oligosaccharides on a murine tumor and a lectin-resistant variant are not responsible for the differential recognition of the tumors by CTL.
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Previous studies have shown that whereas a highly malignant mouse cell line termed MDAY-D2 (d haplotype) does not elicit a detectable response by cytotoxic T lymphocytes (CTL) in DBA/2 mice, strong anti-tumor CTL are generated against a wheat-germ-agglutinin-resistant variant, designated MDW3.
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