| Cytokine-Induced Apoptosis of Beta-Thalassemia/Hemoglobin E Erythroid Progenitor Cells via Nitric Oxide-Mediated Process in vitro. | |
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MedLine Citation:
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PMID: 21934298 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Background/Aim: β-Thalassemia/hemoglobin E (β-thal/HbE) is a common hereditary anemia in Thailand. Ineffective erythropoiesis due to apoptosis and decreased lifespan of circulating thalassemic red blood cells are the major causes of anemia. Changes to bone marrow microenvironment could contribute to apoptotic events. This study examined the effects of cytokines interleukin-1β, tumor necrosis factor-α and interferon-γ on apoptosis of β-thal/HbE erythroid progenitor cells in vitro, including nitric oxide-mediated apoptotic processes. Methods: Percent apoptosis of erythroid progenitor cells from 5 β-thal/HbE patients and 5 normal control subjects was examined using flow cytometry. In addition, the inducible nitric oxide synthase (iNOS) mRNA level and nitrite production were measured using quantitative PCR and the Griess method, respectively. Results: Upon cytokine treatment, a higher percent apoptosis was obtained with β-thal/HbE erythroid progenitor cells compared with control, and the maximum effect was observed using 20 ng/ml interferon-γ on day 14 of culture. There was an increase in iNOS mRNA level and a concomitant elevation of nitrite concentration in culture medium. Apoptosis and nitrite level were abrogated when β-thal/HbE and control cells were treated with S-methylisothiourea sulfate, an iNOS inhibitor. Conclusion: The marked sensitivity of erythroid progenitor cells from β-thal/HbE patients to cytokine-induced apoptosis via an NO-mediated process reflects a proapoptotic status of such thalassemic red blood cells. |
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Authors:
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Wasinee Kheansaard; Prapaporn Panichob; Suthat Fucharoen; Dalina I Tanyong |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-9-21 |
Journal Detail:
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Title: Acta haematologica Volume: 126 ISSN: 1421-9662 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-9-21 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0141053 Medline TA: Acta Haematol Country: - |
Other Details:
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Languages: ENG Pagination: 224-230 Citation Subset: - |
Copyright Information:
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Copyright © 2011 S. Karger AG, Basel. |
Affiliation:
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Department of Clinical Microscopy, Faculty of Medical Technology, Mahidol University, Nakhonpathom, Thailand. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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