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Expression of breast cancer resistance protein (BCRP/ABCG2) in human placenta throughout gestation and at term before and after labor
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Expression of breast cancer resistance protein (BCRP/ABCG2) in human placenta throughout gestation and at term before and after labor
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Journal Article
Expression of breast cancer resistance protein (BCRP/ABCG2) in human placenta throughout gestation and at term before and after labor
2006
Overview
Breast cancer resistance protein, BCRP, is a multidrug resistance protein that is highly expressed in the human placenta. In cancer tissues, this protein actively extrudes a wide variety of chemically and structurally unrelated chemotherapeutic drugs and other compounds. Studies in mice have shown that in the absence of BCRP activity in the placenta, there is a 2-fold increase in the uptake in BCRP substrates into fetus. This suggests that in the placenta, BCRP extrudes compounds that would otherwise cross the syncytiotrophoblast cells into fetal circulation. The purpose of this study was to examine the expression and localization of BCRP in the human placenta throughout gestation. Tissues from 6-13, 16-19, 24-29, 32-35, and 38-41 weeks of gestation were used. Real time RT-PCR analysis demonstrated that the mRNA levels of BCRP in the placenta do not change significantly as gestation progressed. However, Western blot analysis revealed that the protein levels increased towards the end of gestation. We demonstrated that BCRP is localized to the syncytiotrophoblast of the placenta and in some fetal blood vessels within the placenta. Tissues from the early stages of pregnancy (6-13 weeks) showed fewer BCRP positive blood vessels than term tissues (38-41 weeks).
Publisher
National Research Council of Canada,NRC Research Press,Canadian Science Publishing NRC Research Press
Subject
ATP Binding Cassette Transporter, Sub-Family G, Member 2
/ ATP-Binding Cassette Transporters - genetics
/ ATP-Binding Cassette Transporters - metabolism
/ Biological and medical sciences
/ breast cancer resistance protein
/ Female
/ Fundamental and applied biological sciences. Psychology
/ Humans
/ Labor, Obstetric - metabolism
/ Neoplasm Proteins - genetics
/ Neoplasm Proteins - metabolism
/ Oncology
/ Proteins
/ protéine de résistance au cancer du sein
/ Reverse Transcriptase Polymerase Chain Reaction
/ Rodents
/ Vertebrates: anatomy and physiology, studies on body, several organs or systems
