Cryopreserved PBMCs were used to evaluate the H3Ac in lymphocytes by flow cytometry as described previously13 (link). Briefly, after a 20 min blocking with PBS 10% FBS, cells were stained for 30 min with anti-acetyl histone H3 polyclonal rabbit (MerckMillipore 06–599) or with the control stain using normal rabbit serum (LifeTechnologies 10510). After washing, a 30 min incubation with the secondary antibody in the dark was performed (donkey anti-rabbit IgG, LifeTechnologies A21206). The median fluorescence intensity (MFI) for acetyl histone H3 stain was determined and the background was subtracted using the MFI of the isotype control staining.
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