Search results for "Mannose transport"

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Dual effect of 1-deoxymannojirimycin on the mannose uptake and on the N-glycan processing of the human colon cancer cell line HT-29.

1990

International audience; 1-Deoxymannojirimycin (dMM), a specific alpha-mannosidase I inhibitor, completely blocks the conversion of Man9-8GlcNAc2 into Man7-5-GlcNAc2 in both differentiated and undifferentiated human adenocarcinoma HT-29 cells. Besides this well known effect on N-glycan trimming, we describe here a novel effect of this inhibitor on the D-[2-3H]mannose uptake that is exclusively observed in differentiated intestinal cells, i.e. cells that display a functional apical brush border membrane. This inhibition of D-[2-3H]mannose uptake was shown to be dose-dependent and reversible. Moreover, using microsomal fractions we showed that this effect depends only on the integrity of the b…

Glycan1-DeoxynojirimycinBrush borderCellular differentiationMannoseAdenocarcinomaBiologyCell morphologyBiochemistry03 medical and health scienceschemistry.chemical_compound0302 clinical medicinePolysaccharidesalpha-Mannosidase[ CHIM.ORGA ] Chemical Sciences/Organic chemistryMannosidasesTumor Cells CulturedHumansMannose transportMolecular Biology030304 developmental biologyGlucosamine0303 health sciences[CHIM.ORGA]Chemical Sciences/Organic chemistryCell DifferentiationCell BiologyMembrane transport[CHIM.ORGA] Chemical Sciences/Organic chemistry3. Good healthKineticschemistryBiochemistryCell culture030220 oncology & carcinogenesisColonic Neoplasmsbiology.proteinMannose

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