In Vitro Glucose Depletion Assay: A Fluorescence-Based Method to Quantify Cellular Glucose Uptake via Extracellular Glucose Depletion Measurement
Published: April 30, 2023
Abstract
Source: Kumar, S. B. et al., Extracellular Glucose Depletion as an Indirect Measure of Glucose Uptake in Cells and Tissues Ex Vivo. J. Vis. Exp. (2022)
This video demonstrates an in vitro assay to indirectly measure intracellular glucose uptake. The assay uses a fluorescently-labeled glucose analog to establish a correlation between extracellular glucose depletion and intracellular glucose uptake.
Protocol
NOTE: All procedures must be done in a class II biosafety cabinet with the blower on and the lights off. 1. Preparation of materials NOTE: All materials are listed in the Table of Materials. Prepare Medium 1, centrifugation Medium 2, and storage and working solutions of fluorescent 2-deoxy-2-[(7-nitro-2,1,3-benzoxadiazol-4-yl) amino]-D-glucose (2-NBDG or FD-glucose) according to Table 1…
Representative Results
Figure 1: Depletion of extracellular FD-glucose correlated with the intracellular uptake in vitro. 3T3-L1 preadipocytes were incubated in a glucose-free medium for 40 min before incubation with different concentrations of FD-glucose with and without insulin (1.7 mM; 40 min incubation). (A, B) Dose-dependent uptake of FD-glucose (A) and extracel…
Disclosures
The authors have nothing to disclose.
Materials
| 3T3-L1 mouse fibroblasts | ATCC | CL-173 | Cell line |
| 96-well plates | Falcon | 353227 | Plastic ware |
| BioTek Synergy H1 modular multimode microplate reader (Fisher Scientific, US) | Fisher Scientific, US | B-SHT | Device |
| Bovine serum | Gibco/ThermoFisher | 161790-060 | Cell culture |
| Calf serum | Gibco/ThermoFisher | 26010-066 | Cell culture |
| Cell incubator | Forma | Series II Water Jacket | Device |
| Dimethylsulfoxide (DMSO) | Sigma LifeScience | D2650-100mL | Reagent |
| Dulbecco's Modified Eagle Medium | Gibco/ThermoFisher | 11965-092 | Cell culture |
| Ethanol | Sigma Aldrich | E7023-500mL | Reagent |
| Fluorescent 2-deoxy-2-[(7-nitro-2,1,3-benzoxadiazol-4-yl) amino]-D-glucose) | Sigma | 72987-1MG | Assay |
| Glucose-free and phenol red-free DMEM | Gibco/ThermoFisher | A14430-01 | Cell culture |
| Human insulin 10 mg/mL | MilliporeSigma | Cat N 91077C | Reagent |
| Penicillin/streptomycin (P/S) | Gibco/ThermoFisher | 15140-122 | Cell culture |
| Phosphate buffered solution | Sigma-Aldrich | DA537-500 mL | Cell culture |
| Radioimmunoprecipitation assay lysis buffer | Santa Cruz Biotechnology | sc-24948 | Assay |
| Trypsin-EDTA (0.05%) | Gibco/ThermoFisher | 25300-054 | Cell culture |
Tags
Cite This Article
In Vitro Glucose Depletion Assay: A Fluorescence-Based Method to Quantify Cellular Glucose Uptake via Extracellular Glucose Depletion Measurement. J. Vis. Exp. (Pending Publication), e21212, doi: (2023).