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Article

Mitochondria are the primary source of the H2O2 signal for glucocorticoid-induced apoptosis of lymphoma cells

  • Authors:
    • Margaret E. Tome
    • Kristy Lee
    • Melba C. Jaramillo
    • Margaret M. Briehl
  • View Affiliations / Copyright

    Affiliations: Department of Pathology, University of Arizona, Tucson, AZ 85724, USA
  • Pages: 237-242
    |
    Published online on: May 31, 2012
       https://doi.org/10.3892/etm.2012.595
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Abstract

Glucocorticoids are a class of steroid hormones commonly used for the treatment of hematological malignancies due to their ability to induce apoptosis in lymphoid cells. An understanding of the critical steps in glucocorticoid-induced apoptosis is required to identify sources of drug resistance. Previously, we found that an increase in hydrogen peroxide is a necessary signal for glucocorticoid-induced apoptosis. In the current study, we found that mitochondria are the source of the signal. Glucocorticoid treatment inhibited Complex I and Complex III of the electron transport chain (ETC). Mitochondrial matrix reactive oxygen species (ROS) increased concomitantly with the oxidation of the mitochondrial glutathione pool. Treatment with Tiron, a superoxide scavenger, inhibited the signal. This suggests that the hydrogen peroxide signal originates as superoxide from the mitochondria and is metabolized to hydrogen peroxide. An inability to generate mitochondrial oxidants in response to glucocorticoids could cause drug resistance.
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Copy and paste a formatted citation
Spandidos Publications style
Tome ME, Lee K, Jaramillo MC and Briehl MM: Mitochondria are the primary source of the H2O2 signal for glucocorticoid-induced apoptosis of lymphoma cells. Exp Ther Med 4: 237-242, 2012.
APA
Tome, M.E., Lee, K., Jaramillo, M.C., & Briehl, M.M. (2012). Mitochondria are the primary source of the H2O2 signal for glucocorticoid-induced apoptosis of lymphoma cells. Experimental and Therapeutic Medicine, 4, 237-242. https://doi.org/10.3892/etm.2012.595
MLA
Tome, M. E., Lee, K., Jaramillo, M. C., Briehl, M. M."Mitochondria are the primary source of the H2O2 signal for glucocorticoid-induced apoptosis of lymphoma cells". Experimental and Therapeutic Medicine 4.2 (2012): 237-242.
Chicago
Tome, M. E., Lee, K., Jaramillo, M. C., Briehl, M. M."Mitochondria are the primary source of the H2O2 signal for glucocorticoid-induced apoptosis of lymphoma cells". Experimental and Therapeutic Medicine 4, no. 2 (2012): 237-242. https://doi.org/10.3892/etm.2012.595
Copy and paste a formatted citation
x
Spandidos Publications style
Tome ME, Lee K, Jaramillo MC and Briehl MM: Mitochondria are the primary source of the H2O2 signal for glucocorticoid-induced apoptosis of lymphoma cells. Exp Ther Med 4: 237-242, 2012.
APA
Tome, M.E., Lee, K., Jaramillo, M.C., & Briehl, M.M. (2012). Mitochondria are the primary source of the H2O2 signal for glucocorticoid-induced apoptosis of lymphoma cells. Experimental and Therapeutic Medicine, 4, 237-242. https://doi.org/10.3892/etm.2012.595
MLA
Tome, M. E., Lee, K., Jaramillo, M. C., Briehl, M. M."Mitochondria are the primary source of the H2O2 signal for glucocorticoid-induced apoptosis of lymphoma cells". Experimental and Therapeutic Medicine 4.2 (2012): 237-242.
Chicago
Tome, M. E., Lee, K., Jaramillo, M. C., Briehl, M. M."Mitochondria are the primary source of the H2O2 signal for glucocorticoid-induced apoptosis of lymphoma cells". Experimental and Therapeutic Medicine 4, no. 2 (2012): 237-242. https://doi.org/10.3892/etm.2012.595
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