Linked Life Data

11849228

Source:http://linkedlifedata.com/resource/pubmed/id/11849228

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2002-2-18
pubmed:abstractText
Several clinical observations have suggested that copper (Cu) plays a role in regulating haematopoietic progenitor cell (HPC) development. To further study this role we used an ex vivo system. Cord blood-derived CD34+ cells were cultured in liquid medium supplemented with Kit- ligand, FLt3, interleukin 6 (IL-6), thrombopoietin and IL-3. Under these conditions, Cu content, measured by atomic absorption, was 7 ng/10(7) cells. Modulation of intracellular Cu was achieved by supplementing the cultures with the Cu chelator tetraethylenepentamine, which reduced cellular Cu (4 ng/10(7) cells), or ceruloplasmin or Cu sulphate that elevated cellular Cu (18 and 14 ng/10(7) cells respectively). The results indicated that low Cu content delayed differentiation, as measured by the surface antigens CD34, CD14 and CD15, colony-forming unit (CFU) frequency and cell morphology, while high Cu accelerated differentiation compared with Cu unmanipulated cultures. As a result, expansion of total cells, CFU and CD34+ cells in low Cu was extended (12-16 weeks), and in high Cu was shortened (2-4 weeks), compared with control cultures (6-8 weeks). These effects required modulation of intracellular Cu only during the first 1-3 weeks of the culture; the long-term effects persisted thereafter, suggesting that the decision process for either self-renewal or differentiation is taken early during the culture. This novel method of controlling cell proliferation and differentiation by copper and copper chelators might be utilized for ex vivo manipulation of HPC for various clinical applications.
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0007-1048
pubmed:author
pubmed:issnType
Print
pubmed:volume
116
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
655-61
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Cellular copper content modulates differentiation and self-renewal in cultures of cord blood-derived CD34+ cells.
pubmed:affiliation
Gamida-Cell Ltd, Jerusalem, Israel.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't