biostudies-literatureUnknown12(12)Ong LUniveristy of OtagoMutations in the cytochrome c gene (CYCS) cause autosomal dominant thrombocytopenia by an unknown mechanism. While attempting to generate megakaryoblastic cell lines exogenously expressing cytochrome c variants, we discovered that endogenous cytochrome c expression increased both upon induction of differentiation with the phorbol ester phorbol 12-myristate 13-acetate (PMA), and as cell density increased. A concomitant increase in cytochrome c oxidase subunit II in response to PMA, but not cell higher cell density, suggests upregulation of the mitochondrial respiratory chain may be a specific feature of differentiation. These results highlight the likely importance of cytochrome c in both differentiating and proliferating cells, and illustrate the unsuitability of megakaryoblastic lines forPloS onee0190433https://www.ebi.ac.uk/biostudies/studies/S-EPMC5747465biostudies-literatureDifferentiation and cell density upregulate cytochrome c levels in megakaryoblastic cell lines: Implications for analysis of CYCS-associated thrombocytopenia.PMC5747465Ledgerwood ECOng LMcDonald KOfalseDifferentiation and cell density upregulate cytochrome c levels in megakaryoblastic cell lines: Implications for analysis of CYCS-associated thrombocytopenia.Mutations in the cytochrome c gene (CYCS) cause autosomal dominant thrombocytopenia by an unknown mechanism. While attempting to generate megakaryoblastic cell lines exogenously expressing cytochrome c variants, we discovered that endogenous cytochrome c expression increased both upon induction of differentiation with the phorbol ester phorbol 12-myristate 13-acetate (PMA), and as cell density increased. A concomitant increase in cytochrome c oxidase subunit II in response to PMA, but not cell higher cell density, suggests upregulation of the mitochondrial respiratory chain may be a specific feature of differentiation. These results highlight the likely importance of cytochrome c in both differentiating and proliferating cells, and illustrate the unsuitability of megakaryoblastic lines for2017-01-01T00:00:00Z20172026-05-05T21:15:21.842Z2019-03-26T22:58:46ZS-EPMC57474652928708410.1371/journal.pone.0190433