Lipid Rafts and Cytoskeletal Proteins in Placental Microvilli Membranes from Preeclamptic and IUGR Pregnancies
Author
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Riquelme Pino, Gloria
es_CL
Author
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Vallejos, Catalina
es_CL
Author
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De Gregorio, Nicole
es_CL
Author
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Morales, Bárbara
es_CL
Author
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Godoy, Valeria
es_CL
Author
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Berrios, Macarena
es_CL
Author
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Bastias, Noelia
es_CL
Author
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Rodríguez Herrera, Carolina
Admission date
dc.date.accessioned
2014-01-10T14:37:24Z
Available date
dc.date.available
2014-01-10T14:37:24Z
Publication date
dc.date.issued
2011-05
Cita de ítem
dc.identifier.citation
Membrane Biol (2011) 241:127–140
en_US
Identifier
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DOI 10.1007/s00232-011-9369-3
Identifier
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https://repositorio.uchile.cl/handle/2250/129131
General note
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Artículo de publicación ISI
en_US
Abstract
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Intrauterine growth restriction (IUGR) and preeclampsia (PE) are leading causes of perinatal and maternal morbidity and mortality. Previously we reported the expression of lipid rafts in classical microvillous membrane (MVM) and light microvillous membrane (LMVM), two subdomains in apical membrane from the human placental syncytiotrophoblast (hSTB), which constitute the epithelium responsible for maternal-fetal transport. Here the aim was to study the raft and cytoskeletal proteins from PE and IUGR. Microdomains from MVM and LMVM were tested with raft markers (placental alkaline phosphatase, lipid ganglioside, and annexin 2) and a nonraft marker (hTf-R). No changes were detected with those markers in whole purified apical membranes in normal, PE, and IUGR pregnancies; however, their patterns of distribution in lipid rafts were different in PE and IUGR. Cholesterol depletion modified their segregation, confirming their presence in lipid rafts, although unlike normal placenta, in these pathologies there is only one type of microdomain. Additionally, the cytoskeleton proteins actin, ezrin, and cytokeratin-7 showed clear differences between normal and pathological membranes. Cytokeratin-7 expression decreased to 50% in PE, and the distribution between LMVM and MVM (similar to 43 and 57%, respectively) changed in both PE and IUGR, in contrast with the asymmetrical enrichment obtained in normal LMVM (similar to 62%). In conclusion, lipid rafts from IUGR and PE have different features compared to rafts from normal placentae, and this is associated with alterations in the expression and distribution of cytoskeletal proteins.