StarD7 knockdown modulates ABCG2 expression, cell migration, proliferation, and differentiation of human choriocarcinoma JEG-3 cells

StAR-related lipid transfer domain containing 7 (StarD7) is a member of the START-domain protein family whose function still remains unclear. Our data from an explorative microarray assay performed with mRNAs from StarD7 siRNA-transfected JEG-3 cells indicated that ABCG2 (ATP-binding cassette sub-fa...

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Veröffentlicht in:PloS one 2012-08, Vol.7 (8), p.e44152-e44152
Hauptverfasser: Flores-Martín, Jésica, Rena, Viviana, Márquez, Sebastián, Panzetta-Dutari, Graciela M, Genti-Raimondi, Susana
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Rena, Viviana
Márquez, Sebastián
Panzetta-Dutari, Graciela M
Genti-Raimondi, Susana
description StAR-related lipid transfer domain containing 7 (StarD7) is a member of the START-domain protein family whose function still remains unclear. Our data from an explorative microarray assay performed with mRNAs from StarD7 siRNA-transfected JEG-3 cells indicated that ABCG2 (ATP-binding cassette sub-family G member 2) was one of the most abundantly downregulated mRNAs. Here, we have confirmed that knocking down StarD7 mRNA lead to a decrease in the xenobiotic/lipid transporter ABCG2 at both the mRNA and protein levels (-26.4% and -41%, p
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genetics</topic><topic>ATP-Binding Cassette Transporters - metabolism</topic><topic>Biology</topic><topic>Biomarkers - metabolism</topic><topic>Bromodeoxyuridine</topic><topic>Cancer</topic><topic>Carrier Proteins - genetics</topic><topic>Carrier Proteins - metabolism</topic><topic>Cell culture</topic><topic>Cell Differentiation - genetics</topic><topic>Cell Line, Tumor</topic><topic>Cell migration</topic><topic>Cell Movement - genetics</topic><topic>Cell Proliferation</topic><topic>Choriocarcinoma</topic><topic>Choriocarcinoma - genetics</topic><topic>Choriocarcinoma - pathology</topic><topic>Chorionic Gonadotropin, beta Subunit, Human - genetics</topic><topic>Chorionic Gonadotropin, beta Subunit, Human - metabolism</topic><topic>Desmosomes</topic><topic>Differentiation</topic><topic>Experiments</topic><topic>Gene expression</topic><topic>Gene Expression Regulation, Neoplastic</topic><topic>Gene Knockdown Techniques</topic><topic>Gene Products, env - genetics</topic><topic>Gene Products, env - 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Our data from an explorative microarray assay performed with mRNAs from StarD7 siRNA-transfected JEG-3 cells indicated that ABCG2 (ATP-binding cassette sub-family G member 2) was one of the most abundantly downregulated mRNAs. Here, we have confirmed that knocking down StarD7 mRNA lead to a decrease in the xenobiotic/lipid transporter ABCG2 at both the mRNA and protein levels (-26.4% and -41%, p&lt;0.05, at 48 h of culture, respectively). Also a concomitant reduction in phospholipid synthesis, bromodeoxyuridine (BrdU) uptake and (3)H-thymidine incorporation was detected. Wound healing and transwell assays revealed that JEG-3 cell migration was significantly diminished (p&lt;0.05). Conversely, biochemical differentiation markers such as human chorionic gonadotrophin β-subunit (βhCG) protein synthesis and secretion as well as βhCG and syncytin-1 mRNAs were increased approximately 2-fold. In addition, desmoplakin immunostaining suggested that there was a reduction of intercellular desmosomes between adjacent JEG-3 cells after knocking down StarD7. Altogether these findings provide evidence for a role of StarD7 in cell physiology indicating that StarD7 modulates ABCG2 multidrug transporter level, cell migration, proliferation, and biochemical and morphological differentiation marker expression in a human trophoblast cell model.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>22952907</pmid><doi>10.1371/journal.pone.0044152</doi><tpages>e44152</tpages><oa>free_for_read</oa></addata></record>
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subjects ATP Binding Cassette Transporter, Sub-Family G, Member 2
ATP-Binding Cassette Transporters - genetics
ATP-Binding Cassette Transporters - metabolism
Biology
Biomarkers - metabolism
Bromodeoxyuridine
Cancer
Carrier Proteins - genetics
Carrier Proteins - metabolism
Cell culture
Cell Differentiation - genetics
Cell Line, Tumor
Cell migration
Cell Movement - genetics
Cell Proliferation
Choriocarcinoma
Choriocarcinoma - genetics
Choriocarcinoma - pathology
Chorionic Gonadotropin, beta Subunit, Human - genetics
Chorionic Gonadotropin, beta Subunit, Human - metabolism
Desmosomes
Differentiation
Experiments
Gene expression
Gene Expression Regulation, Neoplastic
Gene Knockdown Techniques
Gene Products, env - genetics
Gene Products, env - metabolism
Gene Silencing
Giant Cells - metabolism
Humans
Kinases
Lipids
Localization
Medicine
Metabolism
mRNA
Neoplasm Proteins - genetics
Neoplasm Proteins - metabolism
Phospholipids
Phospholipids - biosynthesis
Pituitary (anterior)
Pregnancy Proteins - genetics
Pregnancy Proteins - metabolism
Protein biosynthesis
Protein expression
Protein synthesis
Proteins
Reduction
RNA, Messenger - genetics
RNA, Messenger - metabolism
RNA, Small Interfering - metabolism
Rodents
siRNA
Syncytin
Thymidine
Tumors
Up-Regulation - genetics
Wound healing
title StarD7 knockdown modulates ABCG2 expression, cell migration, proliferation, and differentiation of human choriocarcinoma JEG-3 cells
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