ExoFACS™ Kit for Cell Culture Media Exosomes

ABIN2868158 产品详细信息, 供应商: Log in to see
Cell Culture (CC), Flow Cytometry (FACS), Separation (Sep)
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原理 Exosome isolation from biofluids or cell culture media and FACS analysis of exosome markers
品牌 ExoFACS™
样品类型 Cell Culture Supernatant
检测方法 Fluorometric
产品特性 ExoFACS™ allows exosome isolation from biofluids or cell culture media and FACS analysis of exosome markers. The kit consists of ExoPure™ for exosome isolation, 4 μm beads for the overall capture of pre-isolated exosomes and lyophilized exosomes from cell culture supernatants or human biological fluids as the positive control. The characterization of exosomal proteins (membrane expressed or internal) is subsequently performed using appropriate detection antibodies against exosome associated antigens. ExoFACS™ contains reagents for 20 reactions (lyophilized exosomes, beads, antibodies and buffers). Primary antibody included in the kit is against a common exosomal marker (CD9 or CD63) and can be used as a positive control for protein profiling via FACS analysis.
组件 ExoPureTM Reagent, FACS-beads, Primary Antibody, Secondary Antibody, Sample Buffer (1X), Exosome Standards (100 μg)
  • Single-use and/or pipettes with disposable tips 2-100 μL
  • Polypropylene tubes
  • Pipettes 1 mL and 5 mL for reagent preparation
  • Deionized water
  • PBS
  • BSA or FBS or FCS
  • Disposable pipetting reservoirs
  • Prepare the Washing buffer (not provided in the kit)
  • FACS tubes
背景 Exosome isolation from biofluids or cell culture media and FACS analysis of exosome markers

Further details regarding sample type: Cell Media

    ExoFACS™ Assay Protocol:
  1. Human Cell culture medium sample preparation: Prepare cell supernatants by 3 centrifugation steps. After each step, transfer the supernatant to a new tube and discard the pellet.
    • 10 min at 300g at 4 °C (save supernatant, discard pellet).
    • 20 min at 1600g at 4 °C (save supernatant, discard pellet).
    • 30 min at 10,000g at 4 °C (save supernatant, discard pellet).
  2. Exosome isolation from Cell Culture Medium:
    Fluid: Cell Medium
    Minimum volume required: 1 mL
    Volume suggested: 1 ml- 5 mL
    • Add ExoPure™ solution to your sample in ratio 1/4 (i.e. 1 mL of cell medium + 1 mL of ExoPure™).
    • Mix well by pipetting and inverting tube.
    • Incubate on ice for 1 hr.
    • Centrifuge 20 min at 10,000g (centrifuge can be performed at 4 °C or at RT).
    • Discard the supernatant.
    • Centrifuge for 2 min at 1500g to eliminate entirely the supernatant.
    • Resuspend the pellet in 100 μL* of 1X PBS. * Volume of resuspension can be defined by the user.
  3. Lyophilized Exosome Standard reconstitution:
    • Reconstitute lyophilized exosome standard by adding 100 μL of deionized water to get a final concentration of 1 μg/μl.
    • Resuspend exosomes pipetting the solution up and down 10-15 times, avoiding bubbles.
    • Vortex the reconstituted standard for 60 secs. Briefly centrifuge the tubes containing the standard to ensure that the solution is collected at the bottom of the tube. Pipette the solution up and down 10 times, avoiding the introduction of bubbles. After this step, the standard is ready to use.
    • Use 5 μL of reconstituted Exosome Standard for each reaction.
  4. Exosome binding onto latex FACS-Beads:
    • It is recommended to prepare the complex Exosome-Beads (Exo-Beads) in one single tube, then to divide in single reactions before the antibody incubation.
    • Latex FACS-Beads are ready to use. Resuspend well FACS-Beads prior to use by vortexing or pipetting several times.
    • For each reaction mix together 5 μL of Exosome Standards and 5 μL of FACS-beads in an eppendorf tube (preferably low binding). Mix well by pipetting 5-6 times. Example: if you want to run 10 reactions, mix into the same eppendorf low binding tube 50 μL of Exosome Standards and 25 μL of FACS-Beads.
    • For exosome isolated by ExoPureTM, mix 25 μL of FACS-Beads with the volume of resuspended exosomes suggested (volumes are indicative only, the user should define the appropriate volumes on the base of exosome yield). Cell medium: 50 μL - 100 μL /reaction.
    • Incubate for 15 min at room temperature (RT).
    • Add 0.7 mL of 1X PBS and incubate in rotator or shaker for 2 hr at RT or overnight (ON) at 4 °C.
    • Centrifuge the complex Exosomes-Beads (Exo-Beads) for 5 min at 4500g at 4 °C and discard the supernatant.
    • Add 1 mL of Sample Buffer, resuspend Exo-Beads for 5-6 times and incubate for 15 min at RT.
    • Centrifuge for 5 min at 4500g at 4 °C, discard the supernatant.
  5. Antibody Incubation:
    • Prepare the Washing buffer (not provided in the kit) diluting 2 % of FBS (or FCS) in 1X PBS (consider that you need 8 mL of washing buffer for each reaction). Alternatively, if you don't have FBS or FCS, prepare the Washing buffer diluting 0.5 % of BSA in 1X PBS. Keep on ice.
    • Resuspend the Exo-Beads in 100 μL of Sample buffer for each reaction. Example: if you are running 10 reactions resuspend Exo- Beads in 1 mL of Sample buffer.
    • Prepare the FACS tubes (not provided in the kit), one tube for each reaction.
    • Divide the Exo-Beads resuspended in sample buffer in each FACS tube, pipetting 100 μL of suspension in each tube.
    • Add primary antibody in ratio 1:200 (0.5 μL per each FACS tube) *. *If other primary antibodies are used the correct dilution must be defined by the user.
    • Incubate for 2 hr at 4 °C in the dark). For negative control, PE or FITC-anti- Mouse IgG1 isotype or FITC or PE anti-Rabbit IgG1 can be used. (isotype controls not provided in the kit) Otherwise incubate control samples with secondary Abs only (either leave in ice or directly add sec Abs).
    • Add 4 mL of prepared Washing buffer to each FACS tube.
    • Centrifuge 5 min at 4000g and discard the supernatant.
    • Resuspend beads pellet into the FACS tubes in 100 μL of Sample buffer.
    • Add secondary antibody in ratio 1:2000. (mix 57 μL of Sample buffer with 3 μL of secondary antibody, add 1 μL of the received solution per each FACS tube to obtain the right dilution of antibody).
    • Incubate for 1 hr in the dark at 4 °C.
    • Add 4 mL of Washing buffer in each FACS tube, centrifuge for 5 min at 4000g at 4 °C. Discard supernatant by pouring it out. Vortex what has remained inside the FACS tubes. If not use immediately, put in the dark at 4 °C.
    • Add 500 μL of Washing buffer per FACS tube.
    • Analyze the samples.
    • Read 10,000 events from the gated first population.
    • Alexa 488 is read in FL1 channel (green)
  6. Reproducibility: ExoFACSTM is a useful tool for exosome protein profiling by using FACS technique. ExoFACSTM was used for a protein marker profile in exosomes derived from different sources. Exosome binding on FACS-beads was performed by incubation at 4 °C overnight. Exosome-bead complex is ready to be labeled with fluorophore-conjugated antibodies for specific exosome markers.
  • ExoFACSTM contains reagents and antibodies for 20 reactions.
  • Exosome standards must be reconstituted in 100 μL of deionized water.
  • ExoPure™ is included in the kit for exosome isolation
  • Beads are ready to use for exosome capture.
  • Primary and secondary antibody must be appropriately diluted in sample buffer.
  • 1 vial (100 μg) of exosome standards (lyophilized), (possibility to choose from the list of lyophilized exosome standards from cell media available (number of particles/mL 1x1010)).
  • Exosome standards: The remaining reconstituted standard stock solution should be aliquoted into polypropylene vials (preferably low binding) and stored at -20 °C for up to one month or at -80 °C for up to six months. Strictly avoid repeated freeze-and-thaw cycles.
  • Store opened and diluted reagents at 4 °C up to 12 months if unopened.
限制 仅限研究用
储存条件 4 °C
储存方法 All the reagents are shipped and stored at 4°C for up to 12 months, if unopened. Briefly centrifuge small vials prior to opening. DO NOT FREEZE!
有效期 12 months
Flow Cytometry (FACS) image for ExoFACS™ Kit for Cell Culture Media Exosomes (ABIN2868158) FACS profiling of exosomal markers CD9, CD63 and TM9SF4 in purified exosomes from MM1...