A fluorescence method for determination of glucose transport by intestinal BBMV of common carp
Analytical Biochemistry, ISSN: 0003-2697, Vol: 537, Page: 20-25
2017
- 5Citations
- 12Captures
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Article Description
Epithelial brush-border membrane vesicles (BBMVs) were isolated from the intestine of common carp and studied systematically by enzyme activity, transmission electron microscopy and immunoblotting. The uptake time course and the substrate concentration effect were assessed, and then, the ability of phlorizin and cytochalasin B to inhibit uptake was analyzed. The results show that sucrase, alkaline phosphatase and Na + -K + -ATPase activities in these vesicles were enriched 7.94-, 6.74- and 0.42-fold, respectively, indicating a relatively pure preparation of apical membrane with little basolateral contamination. The vesicular structure was in complete closure, as confirmed by electron microscopy. The presence of SGLT1 on the BBMVs was confirmed by Western blot analysis. In the time course experiment, the glucose uptake by BBMVs in Na + medium displayed an initial accumulation (overshoot) at 5 min followed by a rapid return to equilibrium values at 60 min. Over the 2-NBDG concentration range selected, the external 2-NBDG concentration in NaSCN medium graphed as a curved line. Phlorizin and cytochalasin B had an obvious inhibitory effect on 2-NBDG transport in carp BBMVs, and the detected fluorescence intensity decreased. The inhibition rate in the 1000 μM group was the strongest at 64.18% and 63.61% of phlorizin and cytochalasin B, respectively, indicating the presence of carriers other than SGLT1. This study is the first to demonstrate that 2-NBDG can be used as a convenient and sensitive probe to detect glucose uptake in fish BBMVs. This technology will provide a convenient method to discover new effects and factors in glucose metabolism.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S000326971730355X; http://dx.doi.org/10.1016/j.ab.2017.08.015; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85028513332&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/28847591; https://linkinghub.elsevier.com/retrieve/pii/S000326971730355X; https://dx.doi.org/10.1016/j.ab.2017.08.015
Elsevier BV
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