1. Lack of HLA-G soluble isoforms in Graves-Basedow thyrocytes and complete cDNA sequence of the HLA-G*01012 allele.
- Author
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Castro MJ, Morales P, Catálfamo M, Fernández-Soria V, Suárez B, Varela P, Pérez-Blas M, Alvarez M, Jaraquemada D, and Arnaiz-Villena A
- Subjects
- Alleles, Alternative Splicing, Cell Line, Cells, Cultured, DNA, DNA, Complementary, Graves Disease genetics, HLA Antigens chemistry, HLA Antigens genetics, HLA-G Antigens, Histocompatibility Antigens Class I chemistry, Histocompatibility Antigens Class I genetics, Humans, Molecular Sequence Data, RNA, Messenger metabolism, Thyroid Gland cytology, Graves Disease immunology, HLA Antigens analysis, Histocompatibility Antigens Class I analysis, Thyroid Gland immunology
- Abstract
The presence of HLA-G mRNA has been studied in thyroid follicular cells from autoimmune patients with Graves' disease. Investigating the possible role of the expression of the HLA-G gene in tissue inflammation, we have found four of the six HLA-G mRNA isoforms described: G1, G2, G3 and G4, but not the soluble ones G5 and G6. Soluble G isoforms may be responsible for inducing tolerance and inflammation control and their absence in autoimmune thyroid follicular cells may induce failure of such control. In addition, the complete coding sequence of HLA-G*01012 has been obtained from thyrocytes and it shows only four synonymous changes with respect to the HLA-G*01011 allele; this further supports the existence of an evolutionary pressure for invariance on HLA-G genes.
- Published
- 1998
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