Linked Life Data

8103771

Source:http://linkedlifedata.com/resource/pubmed/id/8103771

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1993-10-14
pubmed:abstractText
To further define the epitopes with which anti-TSH receptor (anti-TSHR) antibodies react and mediate their biological effects, we used antibodies against the extracellular domain of TSHR (ETSHR) protein and nine peptides derived from the ETSHR. Peptides were chosen based on their predicted immunogenicity as well as their uniqueness to the TSHR. Antipeptide antibodies showed varying degrees of reactivity against ETSHR, with antipeptide-2-(352-366) and -3A-(357-372) showing relatively stronger reactivity with the receptor. Antibodies were tested for their ability to stimulate thyroid cells and were found to be ineffective in causing both cAMP release and iodide uptake. However, anti-3A and anti-ETSHR showed blocking TSHR antibody (TSHRAb) activities of 76.9% and 79.7%, respectively, which were significantly different (P < 0.005) compared to that of preimmune serum. Anti-2 and -91 (AA 32-46) also showed blocking TSHRAb activities of 37.5% and 35.6%, respectively (P < 0.05). Antisera were also tested for their ability to block TSH binding to thyroid membranes in a RRA. Anti-ETSHR, but not any of the antipeptide antibodies, displayed TSH binding inhibitory immunoglobulin activity. These findings suggest that there might be different mechanisms that mediate blocking TSHR antibody activity. One mechanism involves the inhibition of TSH binding to the receptor, and the other probably involves a step subsequent to TSH binding.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0021-972X
pubmed:author
pubmed:issnType
Print
pubmed:volume
77
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
658-63
pubmed:dateRevised
2004-11-17
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Dual mechanism of perturbation of thyrotropin-mediated activation of thyroid cells by antibodies to the thyrotropin receptor (TSHR) and TSHR-derived peptides.
pubmed:affiliation
Department of Microbiology, University of Texas Medical Branch, Galveston, 77555.
pubmed:publicationType
Journal Article