Linked Life Data

6452780

Source:http://linkedlifedata.com/resource/pubmed/id/6452780

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-3
pubmed:dateCreated
1981-6-23
pubmed:abstractText
The regulatory effect on T lymphocyte proliferation of the differentiator thymosin hormone family (thymosin fr. 5, A. L. Goldstein), Ca2+, and purified inhibitory protein fractions prepared from calf thymus was investigated in C57Bl/6 mice. 1.2 mM Ca2+ concentration was the most favourable for murine thymocyte growth in culture. Net protein synthesis was transitorily inhibited by Cu2+ concentrations higher than 2 mM. This inhibition was followed by a marked inhibition of DNA synthesis 2 hrs later. The effect of thymosin fr. 5 was slight, of short duration, and oscillatory in nature; in contrast, chalone-T preparations inhibited thymocyte DNA synthesis permanently up to 12 hrs of cultivation. When spleen cells taken from mice treated with the immunoadjuvant Bacillus Calmette-Guérin (BCG) were exposed to chalone-T in culture, then stimulated with PHA, a reduced proliferative response was measured in chalone-T pretreated cultures compared to controls or spleen cells from normal non-BCG-activated mice. This result had led us to suggest that chalone-T has a dual effect on thymocytes, viz. it inhibits cell cycle progression and induces the phenotypic conversion of suppressor T lymphocytes. The multifactorial concept of T lymphocyte production is discussed.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0001-5288
pubmed:author
pubmed:issnType
Print
pubmed:volume
31
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
33-41
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1980
pubmed:articleTitle
Regulation of T lymphocyte differentiation and proliferation by thymus hormones, Ca2+ and chalone-T.
pubmed:publicationType
Journal Article