Total RNA was extracted as described above using Total RNA Purification Kit (Norgen-Biotek Corp.) according to the manufacturer's instructions. One hundred and fifty nanograms of total RNA was labeled and then hybridized to the Agilent Human SurePrint G3 Human GE 8 × 60 k v16 microarray chip (Agilent Technologies). All microarray experiments were conducted at the Microarray Core Facility (Stem Cell Unit, King Saud University College of Medicine). Normalization and data analyses were conducted using GeneSpring GX software (Agilent Technologies). Pathway analysis were conducted using the Single Experiment Pathway analysis feature in GeneSpring 12.0 (Agilent Technologies) as described before.33 (link), 34 (link) Twofold cutoff with P<0.02 was used.
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