Linked Life Data

2359342

Source:http://linkedlifedata.com/resource/pubmed/id/2359342

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1990-7-31
pubmed:abstractText
We have studied tumor necrosis factor alpha (TNF-alpha) for its capacity to induce differentiation and to modulate c-myc and c-fms protooncogene mRNA expression in fresh blasts from 10 patients with acute myeloblastic leukemia (AML). Bone marrow blast cells were grown in suspension cultures in the presence of 500 U/ml (62 ng/ml) of TNF-alpha for 7 days. Induction of differentiation was assessed by means of morphology, cytochemistry, immunophenotyping (CD11b, CD13, CD14, CD33), and nitroblue tetrazolium reduction. In all cases, exposure of leukemic blasts to TNF-alpha resulted in phenotypic changes consistent with induction of differentiation, although a marked variability in degree and type of response was observed. The majority of cases developed monocytic morphology and showed significant increases (chi 2 test, p less than 0.05) in phagocytic activity and/or expression of ANAE and myelomonocytic differentiation antigens (CD11b, CD14). TNF-alpha reduced c-myc mRNA level over a period of 24 hr in four of six cases studied: the two cases with no down-regulation were the least responsive in terms of myelomonocytic differentiation. These results confirm those obtained with leukemic cell lines, suggesting that TNF-alpha can induce differentiation of fresh AML blasts, mainly toward the monocytic lineage, and that induction of differentiation seems to be closely linked to down-regulation of c-myc mRNA expression over the first 24 hr rather than to attenuation of cellular proliferation per se.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0887-6924
pubmed:author
pubmed:issnType
Print
pubmed:volume
4
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
426-30
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
Tumor necrosis factor alpha down-regulates c-myc mRNA expression and induces in vitro monocytic differentiation in fresh blast cells from patients with acute myeloblastic leukemia.
pubmed:affiliation
Dipartimento di Medicina Interna e Terapia Medica, University of Pavia, Italy.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't