microarray analysis of lung SPC/GFP+ EpCAM+ cells from different smoke exposure mice

We extracted RNA of sorted lung SPC/GFP+ EpCAM+ cells and performed microarray analyses. Total RNA was extracted from sorted Ep-CAMhigh/GFPhigh cells using TRIzol reagent (Invitrogen, Carlsbad, CA) according to the manufacturer’s protocol. The RNA integrity was examined on an Agilent 2100 BioAnalyzer (Agilent Technologies, Santa Clara, CA). Biotinylated ss-cDNA were prepared according to the standard Affymetrix protocol from 100 ng total RNA using the GeneChip WT PLUS Reagent Kit User Manual (Affymetrix/Thermo Fisher Scientific). Fragmented and labeled ss-cDNA were hybridized on a GeneChip Clariom S Array (Affymetrix/Thermo Fisher Scientific) (n =3/group). We used microarrays to detail the global gene expression of SPC/GFP+ EpCAM+ cells from the control mice(G37-1_(Clariom_S_Mouse)), 3 week continuous smoke mice (G37-2_(Clariom_S_Mouse)) and 3 weeks intermittent smoke mice(G37-3_(Clariom_S_Mouse)), and identified distinct classes of up-regulated genes during this process. Lung SPC/GFP+ EpCAM+ cells from the control mice, 3 week continuous smoke mice, and 3 week intermittent smoke mice were sorted, RNA extraction from these cells was hybridized on Affymetrix microarrays.