RPLP0 and EEF1A1 were identified as the most stably expressed housekeeping genes in synovial fibroblasts from healthy and osteoarthritic patients with and without mechanical loading.
RPLP0 and EEF1A1 are the most reliable housekeeping genes for RT-qPCR normalization in human synovial fibroblasts under mechanical loading and osteoarthritic conditions.
Selection of appropriate housekeeping genes is essential for the validity of data normalization in reverse transcription quantitative PCR (RT-qPCR). Synovial fibroblasts (SF) play a mediating role in the development and progression of osteoarthritis (OA) pathogenesis, but there is no information on reliable housekeeping genes available. Therefore the goal of this study was to identify a set of reliable housekeeping genes suitable for studies of mechanical loading on SF from healthy and OA patients. Nine genes were evaluated towards expression stability and ranked according their relative stability determined by four different mathematical procedures (geNorm, NormFinder, BestKeeper and comparative ΔCq). We observed that RPLP0 (ribosomal protein, large, P0) and EEF1A1 (eukaryotic translation elongation factor 1 alpha 1) turned out to be the genes with the most stable expression in SF from non-OA or OA patients treated with or without mechanical loading. According to geNorm two genes are sufficient for normalization throughout. Expression of one tested target gene varied considerably, if normalized to different candidate housekeeping genes. Our study provides a tool for accurate and valid housekeeping gene selection in gene expression experiments on SF from healthy and OA patients with and without mechanical loading in consistent with the MIQE (Minimum Information for Publication of Quantitative Real-Time PCR Experiments) guidelines and additionally demonstrates the impact of proper housekeeping gene selection on the expression of the gene of interest.
Nazet et al. (Fri,) conducted a other in Osteoarthritis (n=20). Mechanical loading (compressive force) vs. Untreated synovial fibroblasts was evaluated on Expression stability of housekeeping genes. RPLP0 and EEF1A1 were identified as the most stably expressed housekeeping genes in synovial fibroblasts from healthy and osteoarthritic patients with and without mechanical loading.