HLA-G
HLA-G: The Immune Regulator of Pregnancy and Beyond
Description:
HLA-G is a unique human leukocyte antigen (HLA) molecule that plays a critical role in the regulation of the immune system during pregnancy. Unlike other HLA molecules, HLA-G is expressed on the surface of fetal trophoblasts, the cells that form the placenta. This strategic location allows HLA-G to interact with immune cells of both the mother and the fetus, creating an immune-privileged environment that protects the developing fetus from rejection.
Associated Diseases:
While HLA-G is primarily associated with pregnancy, its expression has also been linked to various diseases, including:
- Preeclampsia: A pregnancy complication characterized by high blood pressure and proteinuria.
- Fetal growth restriction: A condition where the fetus fails to reach its expected size due to impaired growth.
- Placental abruption: The premature separation of the placenta from the uterus.
- Cancer: HLA-G expression has been observed in several types of cancer, including breast cancer, lung cancer, and melanoma.
Did you Know ?
HLA-G expression levels are highly regulated during pregnancy. In the first trimester, HLA-G expression is low, but it increases steadily as the pregnancy progresses, reaching its peak at term. This surge in HLA-G production is essential for maintaining the immune tolerance necessary for successful pregnancy.
