Adipose Tissue Nuclear Isolation

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From Kang et al

Materials

  • Mice
  • Dissection Tools
  • 2 mL Dounce Homogenizer
  • Hypotonic Lysis Buffe, cool on ice:
Reagent Amount (50 mL) Stock Concentration Final Concentration
HEPES, pH 7.5 500 uL 1M 10 mM
Potassium chloride 500 uL 1M 10 mM
Magnesium chloride 75 uL 1M 1.5 mM
Sucrose 4.28g Solid 250 mM
NP40 2.5 mL 10% 0.5%

Protocol

  • Dissect adipose tissue into weigh boat, and determine the weight
  • Mince to small <1mm pieces with scissors
  • Transfer to a clean tube and add one volume of Hypotonic Lysis Buffer on ice
  • Homogenize with 10 strokes in a 2 mL homogenizer and transfer back to an eppendorf tube
  • Centrifuge at 4C for 5 minutes at 1500g
  • Carefully remove the fat pad with tweezers, store if needed
  • Collect supernatant into fresh tube, carefully remove all remaining cytosol
  • Re-suspend nuclear pellet in 1/10 of the original lysis buffer
  • Quantify protein content in both nuclei and cytosol by Bradford Assay
  • Take 20-50 uL and boil in SDS-PAGE lysis buffer, store remaining cytosol or nuclear lysate in -20 or -80

References

Kang S, Tsai LT, Zhou Y, Evertts A, Xu S, Griffin MJ, Issner R, Whitton HJ, Garcia BA, Epstein CB, Mikkelsen TS, Rosen ED. Identification of nuclear hormone receptor pathways causing insulin resistance by transcriptional and epigenomic analysis. Nat Cell Biol. 2015; 17: 44–56. doi: 10.1038/ncb3080.