Linked Life Data

20699435

Source:http://linkedlifedata.com/resource/pubmed/id/20699435

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2010-10-20
pubmed:abstractText
Given that parthenolide (PTL) is an effective antileukemic agent, identifying molecular markers that predict response to PTL is important. We evaluated the role of myeloperoxidase (MPO) in determining the sensitivity of leukemia cells to PTL-induced apoptosis. In this study, the level of PTL-induced generation of reactive oxygen species (ROS) and apoptosis was significantly higher in the MPO-high leukemia cell lines compared with the MPO-low leukemia cell lines. Pretreatment of MPO-high leukemia cells with a MPO-specific inhibitor, 4-aminobenzoic acid hydrazide, or a MPO-specific small interfering RNA (siRNA) abrogated the PTL-induced ROS generation and apoptosis, indicating that MPO plays a crucial role in PTL-induced apoptosis in leukemia cells. PTL-induced apoptosis was accompanied by down-regulation of nuclear factor-?B, Bcl-xL, Mcl-1, X-linked inhibitor of apoptosis protein, and survivin and selectively observed in primary acute myeloid leukemia (AML) cells expressing higher levels of MPO (?50%) while sparing both AML cells with lower MPO and normal CD34-positive (CD34+) normal bone marrow cells. The extent of PTL-induced apoptosis of the CD34+CD38- cell fraction was significantly greater in the MPO-high AML cases, compared with the MPO-low AML (P < 0.01) and normal CD34+ marrow cells (P < 0.01). Nonobese diabetic/severe combined immunodeficient human leukemia mouse model also revealed that PTL preferentially targets the MPO-high AML cells. Our data suggest that MPO plays a crucial role in determining the susceptibility of leukemia cells to PTL-induced apoptosis. PTL can be considered a promising leukemic stem cell-targeted therapy for AML expressing high levels of MPO.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
1521-0103
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
335
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
389-400
pubmed:meshHeading
pubmed-meshheading:20699435-Animals, pubmed-meshheading:20699435-Antineoplastic Agents, Phytogenic, pubmed-meshheading:20699435-Apoptosis, pubmed-meshheading:20699435-Blotting, Western, pubmed-meshheading:20699435-Cell Line, Tumor, pubmed-meshheading:20699435-Flow Cytometry, pubmed-meshheading:20699435-Glutathione, pubmed-meshheading:20699435-Humans, pubmed-meshheading:20699435-Leukemia, Myeloid, Acute, pubmed-meshheading:20699435-Membrane Potential, Mitochondrial, pubmed-meshheading:20699435-Mice, pubmed-meshheading:20699435-Mice, Inbred Strains, pubmed-meshheading:20699435-Neoplastic Stem Cells, pubmed-meshheading:20699435-Peroxidase, pubmed-meshheading:20699435-RNA, Small Interfering, pubmed-meshheading:20699435-Reactive Oxygen Species, pubmed-meshheading:20699435-Sesquiterpenes, pubmed-meshheading:20699435-Transfection, pubmed-meshheading:20699435-Xenograft Model Antitumor Assays
pubmed:year
2010
pubmed:articleTitle
Myeloperoxidase expression as a potential determinant of parthenolide-induced apoptosis in leukemia bulk and leukemia stem cells.
pubmed:affiliation
Department of Internal Medicine, Yonsei University College of Medicine, 250 Seongsanno, Seodaemun-gu, Seoul 120-752, Korea. minbrmmd@yuhs.ac
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't