Linked Life Data

3595769

Source:http://linkedlifedata.com/resource/pubmed/id/3595769

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1987-8-19
pubmed:abstractText
The continued retrieval of progenitor cells (CFU-GEMM, BFU-E, CFU-E, CFU-GM) from human long-term marrow cultures (LTMC) is not uncommonly used as evidence that proliferation and differentiation are occurring in more primitive hematopoietic stem cells (HSC) in these cultures. Alternatively, the continued presence of progenitors in LTMC could be the result of survival and/or limited self-renewal of progenitor cells present when the culture was initiated, and such progenitors would have little relevance to the parent HSC. The following studies were designed to determine the relative contributions of precursors of progenitor cells to the total progenitor cells present in LTMC using a two-stage regeneration model. The adherent layer in LTMC was established over 3 weeks, irradiated (875 rad) to permanently eliminate resident hematopoietic cells, and recharged with autologous cryo-preserved marrow that was either treated or not treated (control) with 4-hydroperoxycyclophosphamide (4-HC, 100 micrograms/ml for 30 min). The 4-HC-treated marrow contained no progenitor cells, yet based on clinical autologous bone marrow transplant experience, has intact HSC. Within 1-3 weeks, progenitor cells reappeared in the irradiated LTMC recharged with 4-HC-treated marrow, and were preferentially located in the adherent layer. By 2-6 weeks, the number of progenitor in the adherent layer of LTMC recharged with 4-HC marrow was equivalent to control LTMC. The progenitors regenerating in the irradiated LTMC recharged with 4-HC-treated marrow appear to originate from precursors of progenitor cells, perhaps HSC. We propose this model may be useful in elucidating cellular and molecular correlates of progenitor cell regeneration from precursors.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0301-472X
pubmed:author
pubmed:issnType
Print
pubmed:volume
15
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
710-4
pubmed:dateRevised
2004-11-17
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Use of long-term human marrow cultures to demonstrate progenitor cell precursors in marrow treated with 4-hydroperoxycyclophosphamide.
pubmed:publicationType
Journal Article