After PMBC isolation, 1 × 10
6 PBMCs were immediately lysed in 1 ml of
TRIzol (Life Technologies, Carlsbad, CA, USA) and stored at −80°. The samples were thawed and RNA extracted following the manufacturer’s instructions. The quality of the RNA was assessed using a
Nanodrop 2000 Spectrometer (Thermo Scientific, MA, USA) as well as by visualization of the integrity of the 28S and 18S bands on an
Agilent Bioanalyzer 2100 instrument (Agilent Technologies, Santa Clara, CA, USA).
Qualified total RNA was further purified using an
RNeasy micro kit (QIAGEN, GmBH, Germany). Contaminating genomic DNA was removed using an
RNase-Free DNase Set (QIAGEN, GmBH, Germany). The purified RNA was stored at −80° C.
To obtain biotin-labeled cRNA, total RNA was amplified, labeled, and purified using the
GeneChip 3’IVT Express Kit (Affymetrix, Santa Clara, CA, USA) following the manufacturer’s instructions. After hybridization on Human PrimeView Arrays for 16 h at 45°C and rotation at 60 rpm in a
Hybridization Oven 640 (Affymetrix), slides were washed and stained with a
Fluidics Station 450 system (Affymetrix). Scanning was performed on a seventh-generation
GeneChip Scanner 3000 (Affymetrix). Affymetrix GCOS software was used to perform image analysis and generate raw intensity data.
Hou J., Wang S., Jia M., Li D., Liu Y., Li Z., Zhu H., Xu H., Sun M., Lu L., Zhou Z., Peng H., Zhang Q., Fu S., Liang G., Yao L., Yu X., Carpp L.N., Huang Y., McElrath J., Self S, & Shao Y. (2017). A systems vaccinology approach reveals temporal transcriptomic changes of immune responses to the yellow fever 17D vaccine. Journal of immunology (Baltimore, Md. : 1950), 199(4), 1476-1489.