Linked Life Data

14684420

Source:http://linkedlifedata.com/resource/pubmed/id/14684420

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
2004-4-20
pubmed:abstractText
Patients who are chronically infected with hepatitis C virus (HCV) often develop mixed cryoglobulinemia (MC), a B-cell proliferative disorder with polyclonal activation and autoantibody production. We investigated if MC is associated with a deficit of CD4(+)CD25(+) immunoregulatory T (Treg) cells, which have been shown to control autoimmunity. Because Treg cells express higher amounts of CD25 than activated CD4(+) T cells, we analyzed blood CD4(+)CD25(high) Treg cells in 69 untreated patients chronically infected with HCV. Treg cell frequency in patients without MC (8.8% +/- 2.3%) or with asymptomatic MC (7.4% +/- 2.1%) was comparable to that of healthy controls (7.9% +/- 1.3%). In contrast, it was significantly reduced in symptomatic MC patients (2.6% +/- 1.2%, P <.001) even when compared to a panel of untreated HCV(-) patients with different inflammatory disorders (6.2% +/- 0.8%, P <.0001). In symptomatic MC patients, the purified remaining CD4(+)CD25(+) T cells retained suppressive activity in vitro. These results, together with experimental data showing that depletion of Treg cells induces autoimmunity, suggest a major role of Treg cell deficiency in HCV-MC vasculitis and this is the first report of a quantitative Treg cell deficiency in virus-associated autoimmunity.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0006-4971
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
103
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3428-30
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
CD4+CD25+ regulatory T-cell deficiency in patients with hepatitis C-mixed cryoglobulinemia vasculitis.
pubmed:affiliation
Laboratoire de Biologie et Thérapeutique des Pathologies Immunitaires, CNRS/UPMC, UMR 707 and Service de Médecine Interne, Hôpital Pitié-Salpêtrière, Paris, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't