Quantitative real-time reverse-transcription (RT)-PCR is a precise and sensitive method to measure mRNA levels over a broad dynamic range. This chapter describes the quantitative transcript analysis of 41 selected lipid-related transcripts in macrophages and microglia using a novel “Lipidomic” Taqman Array. The Taqman Array results show that (1) stimulation with the liver-X-receptor and retinoid-X-receptor ligands T0901317 and 9-cisretinoic acid induces several genes of lipid metabolism, (2) lipopolysaccharide (LPS) and interferon-g (Ifn-g) strongly repress lipid-related genes, and (3) coincubation with docosahexaenoic acid dampens the repressing effect of LPS. The method described in this chapter can be used to monitor the transcriptional response of 41 dynamic “lipid” genes simultaneously in any cell type.
