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Purification of HLA-G+ Extravillous Trophoblasts from Human Term Placental Tissues for Phenotyping and Functional Analysis
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Low plasma HLA-G protein concentrations in early gestation indicate the development of preeclampsia later in

Shang-mian Yie1, Robert N Taylor, Clifford Librach

  • 1Department of Obstetrics and Gynecology, Sunnybrook and Women's College Health Sciences Centre (SWCHSC), Toronto, Ontario, Canada.

American Journal of Obstetrics and Gynecology
|July 16, 2005
PubMed

Insights

Lower levels of human leukocyte antigen G (HLA-G) in early pregnancy may predict preeclampsia (PE). This finding suggests HLA-G testing could aid in early PE detection.

Area of Science:

  • Reproductive immunology
  • Maternal-fetal medicine

Background:

  • Preeclampsia (PE) is a serious pregnancy complication.
  • Human leukocyte antigen G (HLA-G) plays a role in immune tolerance during pregnancy.

Purpose of the Study:

  • To investigate if early pregnancy circulating HLA-G levels can predict preeclampsia development.
  • To assess the diagnostic potential of HLA-G as an early biomarker for PE.

Main Methods:

  • Longitudinal plasma sampling during first, second, and third trimesters.
  • Quantification of HLA-G protein using a validated sandwich ELISA.
  • Comparison of HLA-G levels between preeclampsia patients and matched controls.

Main Results:

  • Significantly lower first-trimester HLA-G levels in PE patients (1.25 µg/mL) compared to controls (1.95 µg/mL).
  • Significantly lower second-trimester HLA-G levels in PE patients (1.11 µg/mL) compared to controls (1.90 µg/mL).

Conclusions:

  • Circulating HLA-G levels are reduced in the first trimester in women who later develop preeclampsia.
  • Measuring plasma HLA-G concentration may serve as a valuable early predictive marker for preeclampsia.
Abstract

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