Placental Glucose Transporter (GLUT1) Expression in Pre-Eclampsia

Marini, Camilla; Lüscher, Benjamin; Jörger Messerli, Marianne; Sager, Ruth; Huang, Xiao; Gertsch, Jürg; Hediger, Matthias; Albrecht, Christiane; Baumann, Marc Ulrich; Surbek, Daniel (March 2014). Placental Glucose Transporter (GLUT1) Expression in Pre-Eclampsia. Reproductive sciences, 21(3), 304A-304A. Sage

[img] Text
6.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (439kB)

Placental Glucose Transporter (GLUT1) Expression in Pre- Eclampsia. INTRODUCTION: Glucose is the most important substrate for fetal growth. Indeed, there is no significant de novo glucose synthesis in the fetus and the fetal up-take of glucose rely on maternal supply and transplacental transport. Therefore, a defective placental transporter system may affect the intrauterine environment compromising fetal as well as mother well-being. On this line, we speculated that the placental glucose transport system could be impaired in pre-eclampsia (PE). METHODS: Placentae were obtained after elective caesarean sections following normal pregnancies and pre-eclamptic pregnancies. Syncytial basal membrane (BM) and apical microvillus membrane (MVM) fractions were prepared using differential ultra-centrifugation and magnesium precipitation. Protein expression was assessed by western blot. mRNA levels were quantified by quantitative real-time PCR. A radiolabeled substrate up-take assay was established to assess glucose transport activity. FACS analysis was performed to check the shape of MVM. Statistical analysis was performed using one way ANOVA test. RESULTS: GLUT1 protein levels were down-regulated (70%; P<0.01) in pre-eclamptic placentae when compared to control placentae. This data is in line with the reduced glucose up-take in MVM prepared from preeclamptic placentae. Of note, the mRNA levels of GLUT1 did not change between placentae affected by PE and normal placentae, suggesting that the levels of GLUT1 are post-transcriptionally regulated. FACS analysis on MVM vesicles from both normal placentae and pre-eclamptic placentae showed equal heterogeneity in the complexes formed. This excluded the possibility that the altered glucose up-take observed in pre-eclamptic MVM was caused by a different shape of these vesicles. CONCLUSIONS: Protein and functional studies of GLUT1 in MVM suggest that in pre-eclampsia the glucose transport between mother and fetus might be defective. To further investigate this important biological aspect we will increase the number of samples obtained from patients and use primary cells to study trans epithelial transport system in vitro.

Item Type:

Conference or Workshop Item (Abstract)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > Unit Childrens Hospital > Forschungsgruppe Pränatale Medizin
04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Biochemistry and Molecular Medicine

UniBE Contributor:

Marini, Camilla; Lüscher, Benjamin; Jörger Messerli, Marianne; Sager, Ruth; Huang, Xiao; Gertsch, Jürg; Hediger, Matthias; Albrecht, Christiane; Baumann, Marc Ulrich and Surbek, Daniel

Subjects:

500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health

ISSN:

1933-7191

Publisher:

Sage

Language:

English

Submitter:

Barbara Järmann-Bangerter

Date Deposited:

02 Apr 2015 13:52

Last Modified:

02 Sep 2015 10:23

BORIS DOI:

10.7892/boris.67508

URI:

https://boris.unibe.ch/id/eprint/67508

Actions (login required)

Edit item Edit item
Provide Feedback