PMID- 27440734 OWN - NLM STAT- MEDLINE DCOM- 20180118 LR - 20180127 IS - 2059-2310 (Electronic) IS - 2059-2302 (Linking) VI - 88 IP - 3 DP - 2016 Sep TI - Soluble monomers, dimers and HLA-G-expressing extracellular vesicles: the three dimensions of structural complexity to use HLA-G as a clinical biomarker. PG - 77-86 LID - 10.1111/tan.12844 [doi] AB - The HLA-G molecule belongs to the family of nonclassical human leukocyte antigen (HLA) class I. At variance to classical HLA class I, HLA-G displays (i) a low number of nucleotide variations within the coding region, (ii) a high structural diversity, (iii) a restricted peptide repertoire, (iv) a limited tissue distribution and (v) strong immune-suppressive properties. The physiological HLA-G surface expression is restricted to the maternal-fetal interface and to immune-privileged adult tissues. Soluble forms of HLA-G (sHLA-G) are detectable in various body fluids. Cellular activation and pathological processes are associated with an aberrant or a neo-expression of HLA-G/sHLA-G. Functionally, HLA-G and its secreted forms are considered to be key players in the induction of short- and long-term tolerance. Thus, its unique expression profile and tolerance-inducing functions render HLA-G/sHLA-G an attractive biomarker to monitor the systemic health/disease status and disease activity/progression for clinical approaches in disease management and treatments. Here, we place emphasis on (i) the current status of the tolerance-inducing functions by HLA-G/sHLA-G, (ii) the current complexity to implement this molecule as a meaningful clinical biomarker regarding the three dimensions of structural diversity (monomers, dimers and HLA-G-expressing extracellular vesicles) with its functional implications, and (iii) novel and future approaches to detect and quantify sHLA-G structures and functions. CI - (c) 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd. FAU - Nardi, F da Silva AU - Nardi Fda S AD - Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany. AD - Laboratory of Immunogenetics and Histocompatibility (LIGH), Federal University of Parana, Genetics Department, Curitiba, Brazil. AD - Ministry of Education of Brazil, Capes Foundation, Brasilia, Brazil. FAU - Konig, L AU - Konig L AD - Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany. AD - Department of Gynecology and Obstetrics, University of Duisburg-Essen, Essen, Germany. FAU - Wagner, B AU - Wagner B AD - Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany. FAU - Giebel, B AU - Giebel B AD - Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany. FAU - Santos Manvailer, L F AU - Santos Manvailer LF AD - Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany. AD - Ministry of Education of Brazil, Capes Foundation, Brasilia, Brazil. FAU - Rebmann, V AU - Rebmann V AD - Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20160721 PL - England TA - HLA JT - HLA JID - 101675570 RN - 0 (Biomarkers) RN - 0 (HLA-G Antigens) RN - 0 (Protein Isoforms) SB - IM MH - Biomarkers/metabolism MH - Extracellular Vesicles/chemistry/*immunology MH - Female MH - Fetus/immunology MH - Gene Expression Regulation MH - HLA-G Antigens/chemistry/*genetics/immunology MH - Humans MH - Immune System Diseases/*diagnosis/genetics/immunology/pathology MH - *Immune Tolerance MH - Placenta/immunology MH - Polymorphism, Genetic MH - Pregnancy MH - Protein Isoforms/chemistry/genetics/immunology MH - Protein Multimerization MH - Solubility OTO - NOTNLM OT - HLA-G OT - HLA-G monomers OT - HLA-G-expressing EVs OT - KIR2DL4 OT - LILRB1 OT - LILRB2 OT - extracellular vesicles OT - sHLA-G EDAT- 2016/07/22 06:00 MHDA- 2018/01/19 06:00 CRDT- 2016/07/22 06:00 PHST- 2016/06/29 00:00 [received] PHST- 2016/06/29 00:00 [accepted] PHST- 2016/07/22 06:00 [entrez] PHST- 2016/07/22 06:00 [pubmed] PHST- 2018/01/19 06:00 [medline] AID - 10.1111/tan.12844 [doi] PST - ppublish SO - HLA. 2016 Sep;88(3):77-86. doi: 10.1111/tan.12844. Epub 2016 Jul 21.