Linked Life Data

7704007

Source:http://linkedlifedata.com/resource/pubmed/id/7704007

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1995-5-10
pubmed:abstractText
SSA/Ro autoantibodies are frequently found in various autoimmune disorders including subacute cutaneous and neonatal lupus erythematosus. SSA/Ro patient sera precipitate a ribonucleoprotein complex consisting of multiple polypeptides and small RNA molecules (hY RNA). Such sera react in Western blot with at least four antigenically distinct proteins having molecular weights of 52-60 kD. Several laboratories have reported increased binding of anti-SSA/Ro patient serum to viable cultured human epidermal keratinocytes following UVB irradiation. However, it is currently unknown which SSA/Ro molecule(s) might be responsible for this increased antibody binding to UVB irradiated keratinocytes. To address this question, we studied the effect of UVB irradiation on the expression of three different polypeptide components of the SSA/Roautoantigen complex (60 kD SSA/Ro, 52 kD SSA/Ro, and 46 kD SSA/Ro (calreticulin) in A431 cells, a transformed human epidermal keratinocytes cell line. Total cellular and cell surface expression of each SSA/Ro antigenic polypeptide was examined by a whole cell ELISA and FACS using rabbit anti-synthetic peptide antisera as probes. Our results suggest that both total cellular and cell surface calreticulin, but not the 60 and 52 kD SSA/Ro polypeptides, is increased after 100 J/M2 of UVB irradiation, indicating that perturbed calreticulin expression may be primarily responsible for the UVB-induced increased binding of anti-SSA/Ro to keratinocytes. These results suggest that calreticulin could be a critical component of the SSA/Ro ribonucleoprotein complex that is involved in the pathogenesis of anti-SSA/Ro-associated photosensitive LE skin lesions.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0961-2033
pubmed:author
pubmed:issnType
Print
pubmed:volume
3
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
493-500
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1994
pubmed:articleTitle
Impact of ultraviolet irradiation on expression of SSA/Ro autoantigenic polypeptides in transformed human epidermal keratinocytes.
pubmed:affiliation
Department of Dermatology, University of Texas Southwestern Medical Center, Dallas 75235.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't