2013
DOI: 10.3892/ijo.2013.1949
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ROS and ERK1/2-mediated caspase-9 activation increases XAF1 expression in dexamethasone-induced apoptosis of EBV-transformed B cells

Abstract: Dexamethasone (Dex) inhibits the growth of diverse types of cancer cells and is utilized clinically for the therapy of hematological malignancies. In this study, we investigated the molecular mechanisms of Dex action in the apoptosis of Epstein-Barr virus (EBV)-transformed B cells. We showed that Dex inhibited the proliferation of EBV-transformed B cells and induced apoptosis by activating caspase-9, -3 and -8. While activation of caspase-9 was triggered as early as 2 h after Dex treatment, cleavage of caspase… Show more

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Cited by 24 publications
(13 citation statements)
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“…Attenuation of ATP decrease after TAC by UCP2 knockout, as shown in the current study, apparently could result in cardioprotection. In contrast to the connection between cell apoptosis and ROS [26,27], we showed increased ROS, but not increased apoptosis after TAC, possibly due to enhanced oxygen utilization after UCP2 knockout [28]. Exact mechanisms underlying such discrepancy, however, needs further studies.…”
Section: Discussionmentioning
confidence: 52%
“…Attenuation of ATP decrease after TAC by UCP2 knockout, as shown in the current study, apparently could result in cardioprotection. In contrast to the connection between cell apoptosis and ROS [26,27], we showed increased ROS, but not increased apoptosis after TAC, possibly due to enhanced oxygen utilization after UCP2 knockout [28]. Exact mechanisms underlying such discrepancy, however, needs further studies.…”
Section: Discussionmentioning
confidence: 52%
“…ROS act as an early signal activator to provoke apoptosis in vinca alkaloid-treated lung adenocarcinoma cells (53). In our previous report, we proposed that ROS generation might be the initiating event in the translocation of XAF1 and phosphorylation of ERK1/2 in dexamethasone-induced apoptosis of EBV-transformed B cells (54). Likewise, NAC, p38 inhibitor, and JNK inhibitors significantly inhibited berberine-induced apoptosis by restoration of proapoptotic proteins, including PUMA, phosphorylated Bax, and phosphorylated Bim to control levels and completely blocked the upregulation of XAF1, GADD45α, and phosphorylation of p53.…”
Section: Discussionmentioning
confidence: 94%
“…Since FMDV induces apoptosis of DCs [12] and that ERK1/2 is associated to the activation of caspase-9 [26], we decided to analyze this fact on murine conventional DCs differentiated from murine bone marrow (Fig. 2A).…”
Section: Fmdv Activates the Intrinsic Pathway Of Apoptosismentioning
confidence: 99%