High Amounts of Total and Extracellular Vesicle-Derived Soluble HLA-G are Associated with HLA-G 14-bp Deletion Variant in Women with Embryo Implantation Failure
Problem Human leukocyte antigen‐G (HLA‐G) expression is related to 14‐bp insertion/deletion polymorphism at the 3′UTR of the HLA‐G gene. Soluble forms of HLA‐G are released as free molecules or via extracellular vesicles (EVs). Due to the crucial role of HLA‐G during pregnancy, we analyzed the 14‐bp...
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Published in | American journal of reproductive immunology (1989) Vol. 75; no. 6; pp. 661 - 671 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Denmark
Blackwell Publishing Ltd
01.06.2016
Wiley Subscription Services, Inc |
Subjects | |
Online Access | Get full text |
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Summary: | Problem
Human leukocyte antigen‐G (HLA‐G) expression is related to 14‐bp insertion/deletion polymorphism at the 3′UTR of the HLA‐G gene. Soluble forms of HLA‐G are released as free molecules or via extracellular vesicles (EVs). Due to the crucial role of HLA‐G during pregnancy, we analyzed the 14‐bp polymorphism and the two secreted forms in implantation failure women (IF) and in fertile women (FW).
Method of study
For the genetic analysis, 49 IF and 34 FW were genotyped. For sHLA‐G quantification, serum samples from 35 IF and 23 FW were available. ExoQuick™ kit was used for EVs precipitation. The total soluble HLA‐G (sHLA‐Gtot) and vesicular sHLA‐GEV were quantified by ELISA. The EVs size and concentration were determined by nanoparticle tracking analysis (NTA).
Results
An increased proportion of IF presented high levels of sHLA‐Gtot (P = 0.02) and vesicular sHLA‐GEV (P = 0.0003) compared to FW. The 14‐bp deletion allele is more frequent in IF (P = 0.0002) and associated with high levels of sHLA‐Gtot and vesicular sHLA‐GEV.
Conclusion
The high expression of sHLA‐Gtot and sHLA‐GEV, together with the presence of the 14‐bp deletion allele, might be involved in implantation failure. |
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Bibliography: | State of North Rhine-Westphalia - No. 005-1403-0110 FUNPAR-LIGH ArticleID:AJI12507 ark:/67375/WNG-H6QBGZ7J-Q Figure S1. Determination of EVs size by Nanoparticle Tracking Analysis (NTA). (A) Representative image showing the determination of EVs size, enriched by ExoQuick™ solution; (B) The corresponding mean particles size (nm) according to NTA; (C) Distribution size of EVs derived from IF (n = 35) and FW (n = 23). Data are presented as mean ± S.D.; (D) Circulating EVs were significantly increased in IF (n = 35) compared to FW (n = 23) by Mann-Whitney test. Data are presented as median and interquartile range. istex:C155753FDF40DB66866AD85E4A4C59C33C91DBBC ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1046-7408 1600-0897 |
DOI: | 10.1111/aji.12507 |