Expression data from Hh signaling-deficient OP9 stromal cells

In the bone marrow B cell development occurs in initimate and essential association with stromal cells. Known effects of stromal cells on B cell development have been shown to be mediated through direct contact and by soluble factors produced by stromal cells. Our findings suggest that cell-nonautonomous Hh signaling may play an important role in B cell lymphopoiesis. We therefore interrogated OP9 stromal cells for Hh-dependent transcripts that may confer B lymphopoietic identity. We generated OP9 stromal cells deficient in Hh signaling through targeting the non-redundant, pathway-obligate GPCR Smoothened. OP9 cells were transduced with RNAi pLKO.1-Puro lentiviral particles expressing a scrambled control shRNA (NT) or shRNA targeting Smoothened (Smo-kd). RNA from stable NT and Smo-kd OP9 cells were isolated in triplicate and global changes in transcripts were analyzed using the Affymetrix Mouse Exon 1.0 ST gene chip.