Abstract:
:Arsenic trioxide (As2O3) is currently employed as a treatment for relapsed acute promyelocytic leukemia (APL), where it can induce remission in greater than 90% of patients, but is ineffective in patients with non-APL acute myeloid leukemia (AML). As2O3 induces apoptosis in APL cells through mechanisms dependent and independent of the PML-RARalpha fusion protein. Through PML-RARalpha fusion-independent mechanisms, As2O3 increases H2O2 production via its effects on glutathione and glutathione peroxidase. Catalase is an alternative mechanism to convert H2O2 to water. Therefore, we explored the relationship between catalase activity and As2O3 sensitivity. In AML and APL cell lines, but not primary patient samples, basal catalase levels matched sensitivity to As2O3. However, the chemical inhibition of catalase did not enhance As2O3-induced cell death. Failure of catalase inhibition to sensitise cells to As2O3 was due to a failure of catalase inhibition to increased levels of reactive oxygen species. Therefore, other strategies should be explored to enhance the cytotoxicity of As2O3 in AML.
journal_name
Leuk Lymphomajournal_title
Leukemia & lymphomaauthors
Coe E,Schimmer ADdoi
10.1080/10428190802353617subject
Has Abstractpub_date
2008-10-01 00:00:00pages
1976-81issue
10eissn
1042-8194issn
1029-2403pii
904755694journal_volume
49pub_type
杂志文章abstract::The term high-risk multiple myeloma is aimed to identify a heterogeneous group of patients who are more likely to progress and die early of their disease. Therefore, recognition of these patients is crucial. With the increase in the number of treatment options, the outcome for high-risk patients has probably improved,...
journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
pub_type: 杂志文章,评审
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journal_title:Leukemia & lymphoma
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doi:10.1080/10428190410001697395
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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pub_type: 临床试验,杂志文章
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
pub_type: 杂志文章,评审
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
pub_type: 杂志文章,评审
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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