Linked Life Data

9300676

Source:http://linkedlifedata.com/resource/pubmed/id/9300676

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1997-10-8
pubmed:abstractText
Impaired immune responses are frequently observed in tumor-bearing hosts during progression of tumor growth, but the molecular basis of these functional defects remains unclear. To investigate tumor-induced immunosuppression, we first established that lymphocytes from mice bearing s.c. mammary adenocarcinoma (TS/A) tumors were severely impaired in their ability to generate cellular and humoral Ag-specific responses. Lymphocytes from these mice were then screened for abnormalities in the expression of signal transducing proteins known to be involved in the regulation of cellular immunity. Interestingly, purified T and B cells isolated from immunocompromised tumor-bearing mice displayed a marked decrease in the transcription activators STAT5a and -b at the protein level and to a lesser extent at the mRNA level. By contrast, no change in the expression of STAT1, -3, and -6 or of the TCR itself were detected. The correlation in the loss of T and B cell function with the selective decrease in STAT5a/b expression suggests that regulation of the STAT5 signaling pathway may provide a molecular mechanism for modulating the immune system.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0022-1767
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
159
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2580-5
pubmed:dateRevised
2005-11-17
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
Immunocompromised tumor-bearing mice show a selective loss of STAT5a/b expression in T and B lymphocytes.
pubmed:affiliation
Experimental Immunology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
pubmed:publicationType
Journal Article