Poras, IsabelleYaghi, LayaleMartelli-Palomino, GustavoMendes, Celso T.Muniz, Yara Costa NettoCagnin, Natalia F.De Almeida, Bibiana SgorlaCastelli, Erick C. [UNESP]Carosella, Edgardo D.Donadi, Eduardo A.Moreau, Philippe2018-12-112018-12-112017-01-01PLoS ONE, v. 12, n. 1, 2017.1932-6203http://hdl.handle.net/11449/176972The immune checkpoint HLA-G prevents maternal rejection of the fetus and contributes in cancer invasion and acceptance of allografts. The 5′ and 3′ regulatory regions of the HLA-G gene are polymorphic and balancing selection probably maintains this variability. It is proposed that nucleotide variations may affect the level of HLA-G expression. To investigate this issue we aimed to analyze how haplotypes of the 3′ untranslated region (3′UTR) with highest worldwide frequencies, namely UTR-1, UTR-2, UTR-3, UTR-4, UTR-5, UTR-18 and UTR-7, impact the expression of a luciferase reporter gene in vitro. Experiments performed with the HLA-G positive cell lines JEG-3 (choricarcinoma) and FON (melanoma), and with the HLA-G negative cell lines M8 (melanoma) and U251MG (glioblastoma) showed that the HLA-G 3′UTR polymorphism influences the response to endogenous cellular factors and may vary according to the cell type. UTR-5 and UTR-7 impact the activity of luciferase the most whereas UTR-2, UTR-3, UTR-4, and UTR-18 have intermediate impact, and UTR-1 has the lowest impact. These results corroborate the previous associations between amounts of plasma sHLA-G levels and 3′UTR haplotypes in healthy individuals and reinforce that 3′UTR typing may be a predictor of the genetic predisposition of an individual to express different levels of HLA-G.engArtigo10.1371/journal.pone.0169032Acesso aberto2-s2.0-850081920462-s2.0-85008192046.pdf