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4 protocols using murine 3t3 l1 cells

1

Exosome Labeling and Uptake Assay

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Purified exosomes from either human or mouse plasma samples were labeled with green fluorescent linker PKH67 (Sigma-Aldrich, St. Louis, MO), Exo-Red, and Exo-Green (System Biosciences, Mountain View, CA), and further incubated at 37°C for 10 min, until the reaction was stopped by adding ExoQuick-TC reagent. Labeled exosomes were added to either differentiated human adipocytes (# PT-5006, Lonza, Walkersville, MD) or murine 3T3-L1 cells (ATCC, Manassas, VA) for 4 hours in a cell culture incubator at 37°C. Labeled exosomes were monitored for delivery into target cells using a Leica SP5 Tandem Scanner Spectral 2-photon confocal microscope (Leica Microsystems, Inc., Buffalo Grove, IL) with a 63× oil-immersion lens.
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2

Exosome Labeling and Uptake Assay

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Purified exosomes from either human or mouse plasma samples were labeled with green fluorescent linker PKH67 (Sigma-Aldrich, St. Louis, MO), Exo-Red, and Exo-Green (System Biosciences, Mountain View, CA), and further incubated at 37°C for 10 min, until the reaction was stopped by adding ExoQuick-TC reagent. Labeled exosomes were added to either differentiated human adipocytes (# PT-5006, Lonza, Walkersville, MD) or murine 3T3-L1 cells (ATCC, Manassas, VA) for 4 hours in a cell culture incubator at 37°C. Labeled exosomes were monitored for delivery into target cells using a Leica SP5 Tandem Scanner Spectral 2-photon confocal microscope (Leica Microsystems, Inc., Buffalo Grove, IL) with a 63× oil-immersion lens.
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3

3T3-L1 Adipocyte Differentiation

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Murine 3T3-L1 cells were obtained from the American Type Culture Collection (Manassas, VA, USA) and cultured in DMEM with 10% fetal calf serum. Confluent 3T3-L1 cells were treated with a cocktail of 0.5 mM isobutylmethylxanthine, 1 mM dexamethasone, 5 mg/ml insulin, and 5 mM troglitazone (all from Sigma–Aldrich, St Louis, MO, USA) to induce differentiation. After 2 days of differentiation, the cells were maintained in a medium with insulin until harvest. Experiments were conducted using differentiated adipocytes (10–14 days).
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4

Murine 3T3-L1 Cell Differentiation

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Murine 3T3-L1 cells (American Type Culture Collection) were cultured in Dulbecco’s Modified Eagle Medium (DMEM) supplemented with 10% fetal calf serum and 100 μg/mL penicillin/streptomycin in a humidified atmosphere of 5% CO2 at 37°C. Cells were differentiated and analyzed as previously described [10 (link)]. Immunostaining was performed on differentiated day 8.
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