PMID- 21779557 OWN - NLM STAT- MEDLINE DCOM- 20120116 LR - 20191210 IS - 2042-650X (Electronic) IS - 2042-6496 (Linking) VI - 2 IP - 2 DP - 2011 Feb TI - Normalization genes for quantitative RT-PCR in differentiated Caco-2 cells used for food exposure studies. PG - 124-9 LID - 10.1039/c0fo00068j [doi] AB - Exposure of food products to small-intestinal-like Caco-2 cells, combined with a gene expression based response analysis can be a valuable tool to classify potential bioactive effects of food homogenates. In order to study changes in gene expression upon food exposure, a robust set of stably expressed genes is required for normalization. Here we present a set of reference genes suitable for RT-qPCR that has been validated for exposure studies with the intestinal-like Caco-2 cell line. This study identified ribosomal phosphoprotein P0 (RPLP0) and glyceraldehyde-3-phosphate dehydrogenase (GAPDH) as best reference genes. The set can be extended with beta-2-microglobulin (B2M), splicing factor 3A, subunit 1 (SF3A1), and mitochondrial ribosomal protein L19 (MRPL19). Food homogenates did provoke responses in the Caco-2 cells, as was demonstrated by changed expression of NAD(P)H Quinone dehydrogenase 1 (NQO1), Claudin 4 (CLDN4), Nitric Oxide Synthase 2 (NOS2), and ATP-binding cassette, subfamily B, member 1 (ABCB1) in the same experiment. Results indicate that: i) natural food homogenates can exert effects in Caco-2 cells, and ii) stability in expression of the reference genes is not due to a lack of response of the Caco-2 cells. FAU - Vreeburg, Robert A M AU - Vreeburg RA AD - Wageningen University and Research centre, Food & Biobased Research, P.O. Box 17, 6700 AA, Wageningen, The Netherlands. robert.vreeburg@wur.nl FAU - Bastiaan-Net, Shanna AU - Bastiaan-Net S FAU - Mes, Jurriaan J AU - Mes JJ LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Validation Study DEP - 20101213 PL - England TA - Food Funct JT - Food & function JID - 101549033 RN - 0 (ABCB1 protein, human) RN - 0 (ATP Binding Cassette Transporter, Subfamily B) RN - 0 (ATP Binding Cassette Transporter, Subfamily B, Member 1) RN - 0 (CLDN4 protein, human) RN - 0 (Claudin-4) RN - 0 (Claudins) RN - 0 (DNA Primers) RN - 0 (MRPL19 protein, human) RN - 0 (Mitochondrial Proteins) RN - 0 (RNA Splicing Factors) RN - 0 (Ribonucleoprotein, U2 Small Nuclear) RN - 0 (Ribosomal Proteins) RN - 0 (SF3A1 protein, human) RN - 0 (beta 2-Microglobulin) RN - 0 (ribosomal protein P0) RN - EC 1.14.13.39 (NOS2 protein, human) RN - EC 1.14.13.39 (Nitric Oxide Synthase Type II) RN - EC 1.2.1.- (Glyceraldehyde-3-Phosphate Dehydrogenases) RN - EC 1.6.5.2 (NAD(P)H Dehydrogenase (Quinone)) RN - EC 1.6.5.2 (NQO1 protein, human) SB - IM MH - ATP Binding Cassette Transporter, Subfamily B MH - ATP Binding Cassette Transporter, Subfamily B, Member 1/genetics MH - Caco-2 Cells MH - Claudin-4 MH - Claudins/genetics MH - DNA Primers/*standards MH - *Food MH - *Fruit MH - Gene Expression/genetics MH - Glyceraldehyde-3-Phosphate Dehydrogenases/genetics MH - Humans MH - Mitochondrial Proteins/genetics MH - NAD(P)H Dehydrogenase (Quinone)/genetics MH - Nitric Oxide Synthase Type II/genetics MH - RNA Splicing Factors MH - Real-Time Polymerase Chain Reaction/methods/*standards MH - Reference Standards MH - Ribonucleoprotein, U2 Small Nuclear/genetics MH - Ribosomal Proteins/genetics MH - *Vegetables MH - beta 2-Microglobulin/genetics EDAT- 2011/07/23 06:00 MHDA- 2012/01/17 06:00 CRDT- 2011/07/23 06:00 PHST- 2011/07/23 06:00 [entrez] PHST- 2011/07/23 06:00 [pubmed] PHST- 2012/01/17 06:00 [medline] AID - 10.1039/c0fo00068j [doi] PST - ppublish SO - Food Funct. 2011 Feb;2(2):124-9. doi: 10.1039/c0fo00068j. Epub 2010 Dec 13.