{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,23]],"date-time":"2026-06-23T21:47:44Z","timestamp":1782251264167,"version":"3.54.5"},"reference-count":77,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2006,9,14]],"date-time":"2006-09-14T00:00:00Z","timestamp":1158192000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Immunological Reviews"],"published-print":{"date-parts":[[2006,10]]},"abstract":"<jats:p><jats:bold>Summary:\u2002<\/jats:bold> Mammalian mothers and their embryos\/fetuses are almost invariably genetically different, which raises the question of how the mother\u2019s immune system is diverted so as to permit cohabitation with the \u2018foreign\u2019 body. Several decades of research have shown that multiple cooperative systems sanction uteroplacental immune privilege. These systems include production of several varieties of soluble immunosuppressive molecules in the uterus and the placenta and strict regulation of the molecules expressed on or by placental trophoblast cells. Trophoblast, a unique lineage without counterpart in adult tissues, is in direct contact with maternal blood and tissue. The major graft rejection\u2010promoting molecules, human leukocyte antigens (HLAs), are tightly regulated in these cells, with none of HLA\u2010A, HLA\u2010B, or HLA class II antigens expressed. The HLA class Ib antigens, HLA\u2010E, HLA\u2010F, and HLA\u2010G, are detectable on some subpopulations. Our studies have focused on the expression, regulation, and functions of the soluble isoforms of HLA\u2010G, which circulate in maternal blood and are present at high levels in the pregnant uterus. These isoforms are derived from the single <jats:italic>HLA\u2010G<\/jats:italic> gene by alternative splicing and are now known to have immunosuppressive properties. Ours and other studies indicate that soluble HLA\u2010G proteins may comprise a unique tolerogenic system for establishing local immune privilege during pregnancy.<\/jats:p>","DOI":"10.1111\/j.1600-065x.2006.00436.x","type":"journal-article","created":{"date-parts":[[2006,9,14]],"date-time":"2006-09-14T11:32:24Z","timestamp":1158233544000},"page":"36-47","source":"Crossref","is-referenced-by-count":142,"title":["Stranger in a strange land"],"prefix":"10.1111","volume":"213","author":[{"given":"Joan S.","family":"Hunt","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2006,9,14]]},"reference":[{"key":"e_1_2_9_2_2","volume-title":"Stranger in a Strange Land","author":"Heinlein 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