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05. Hierarchical clustering of the 55 probe sets differentially expressed in ND and PV-derived ERYs (ANOVA FDR http://www.selleck.cn/products/gsk126.html ABCA1, which has been demonstrated to mobilize HSPCs into the livers and spleens of Abca1 ?/? mice [22], is significantly down-regulated in PV-derived ERYs, suggesting that PV derived MNCs may be affected in a similar manner. ND-derived ERYs expressed higher levels of the magnesium ion transporters MAGT1, KCNMB2, HSD18B7 while ND ERYs expressed higher levels of KCNK5. Furthermore ND-derived ERYs expressed higher levels of the adenosine-A1 GPCR ADORA1 and the GTPase EVI5, while PV-derived ERYs expressed higher levels of the adhesion GPCR GPR56 and the known oncogenic GTPase RAB4A. Both GPR56 and RAB4 have been shown http://www.selleckchem.com/products/BI-2536.html to contribute to cellular transformation in different tumor contexts [23, 24] and to regulate the recycling of cell membrane receptors including PDGFR via interactions with the endoplasmic reticulum [25]. This suggests that specific oncogenic effectors are differentially expressed in PV erythroid cells and that these effectors may play a role in maintaining self-renewal during ERY expansion. Mitochondrial http://www.selleckchem.com/products/Cyclopamine.html genes HMGCL and UCP2 were significantly enriched in ND-derived ERY samples while their organelle-localized counterparts OXCT1, PDSS1, APIP, and PRDX3 were more highly expressed in PV-derived samples. Loss of PRDX3 has been observed in Fanconi anemia and implicated in the loss of structural integrity of mitochondria, which display decreased sensitivity to oxidative stress [26]. Notably, TAL1 and ZBTB3 were the only two transcription factors displaying differential expression in our experimental contrast and were both expressed at higher levels in ND ERYs. TAL1 has been shown to act as a positive regulator of erythroid differentiation and is targeted and activated by GATA1 [27, 28]. The observed decrease in TAL1 expression in PV-derived ERYs suggests that EPO signaling for growth and differentiation diverges in PV-derived ERYs, and that decreasing levels of TAL1 mRNA may require PV-derived ERYs to recruit compensatory factors for survival. Non-protein encoding RNAs, including the lncRNA DLEU1 and psuedogenes CYCSL1 and HNRPNA1PA, were significantly enriched in ERYs derived from PV patients.