Linked Life Data

1283550

Source:http://linkedlifedata.com/resource/pubmed/id/1283550

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
1993-3-10
pubmed:abstractText
A methodology for selection of the CD8 cell subset from the peripheral blood and bone marrow mononuclear cells was developed using anti-T8 (CD8) antibody and magnetic microspheres coated with anti-mouse IgG. Following optimization of antibody:cell binding ratio and microsphere:cell ratios, CD8(+)-cells in the peripheral blood and bone marrow were effectively removed, with an overall final recovery of 34.9% +/- 8.6%, and 56% +/- 8.5% respectively with complete recovery of stem cells and very little contamination with effector cells. CD8(+)-depleted cell preparations demonstrated a 3-4 fold increase in CFU-C and CFU-E colony formation over non-depleted preparations when stimulated with G-CSF, GM-CSF or IL-3 and erythropoietin. The largest increase in colony formation was evident when IL-3 was used to stimulate colony formation. Purified autologous CD8+ T-cells or culture supernatant from in vitro cultures of purified autologous CD8+ T-cells added back to CD8 depleted preparations, induced 20%-90% suppression of CFU-C and CFU-E colony formation in a dose dependent manner. Colony formation by CD34+ cells, purified by anti CD34 antibodies and magnetic microspheres, were also inhibited by either pure CD8(+)-cell populations or CD8-culture supernatant. Preliminary fractionation studies indicate that the inhibitory factor is a protein of > 50 kd. In contrast, when purified autologous CD4+ cells were added to purified CD34+ stem cells, an increase (< 50%) in colony formation was observed. These results, taken together, suggest that CD8+ T-cells are negative effectors of normal hematopoiesis whereas CD4+ T-cells function as positive effectors.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
1042-8194
pubmed:author
pubmed:issnType
Print
pubmed:volume
8
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
117-27
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
Down regulation of stem cell colony formation by purified CD8 lymphocytes and CD8 conditioned medium: potential importance for bone marrow transplantation in leukemia.
pubmed:affiliation
Department of Pediatric Hematology-Oncology, University of Florida, Gainesville.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't