Liping Qiao1, Jean-Sebastien Wattez1, Samuel Lee1, Zhuyu Guo1, Jerome Schaack2, William W Hay3, Matteo Moretto Zita4, Mana Parast4, Jianhua Shao5. 1. Department of Pediatrics, University of California San Diego, 9500 Gilman Drive, MC 0983, La Jolla, CA, 92093, USA. 2. Department of Microbiology, University of Colorado at Denver and Anschutz Medical Center, Aurora, CO, 80045, USA. 3. Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO, 80045, USA. 4. Department of Pathology, University of California San Diego, La Jolla, CA, 92093, USA. 5. Department of Pediatrics, University of California San Diego, 9500 Gilman Drive, MC 0983, La Jolla, CA, 92093, USA. jishao@ucsd.edu.
Abstract
AIMS/HYPOTHESIS: The main objective of this study was to investigate whether maternal adiponectin regulates fetal growth through the endocrine system in the fetal compartment. METHODS: Adiponectin knockout (Adipoq (-/-) ) mice and in vivo adenovirus-mediated reconstitution were used to study the regulatory effect of maternal adiponectin on fetal growth. Primary human trophoblast cells were treated with adiponectin and a specific peroxisome proliferator-activated receptor α (PPARα) agonist or antagonist to study the underlying mechanism through which adiponectin regulates fetal growth. RESULTS: The body weight of fetuses from Adipoq (-/-) dams was significantly greater than that of wild-type dams at both embryonic day (E)14.5 and E18.5. Adenoviral vector-mediated maternal adiponectin reconstitution attenuated the increased fetal body weight induced by maternal adiponectin deficiency. Significantly increased blood glucose, triacylglycerol and NEFA levels were observed in Adipoq (-/-) dams, suggesting that nutrient supply contributes to maternal adiponectin-regulated fetal growth. Although fetal blood IGF-1 concentrations were comparable in fetuses from Adipoq (-/-) and wild-type dams, remarkably low levels of IGF-binding protein 1 (IGFBP-1) were observed in the serum of fetuses from Adipoq (-/-) dams. IGFBP-1 was identified in the trophoblast cells of human and mouse placentas. Maternal fasting robustly increased IGFBP-1 levels in mouse placentas, while reducing fetal weight. Significantly low IGFBP-1 levels were found in placentas of Adipoq (-/-) dams. Adiponectin treatment increased IGFBP-1 levels in primary cultured human trophoblast cells, while the PPARα antagonist, MK886, abolished this stimulatory effect. CONCLUSIONS/ INTERPRETATION: These results indicate that, in addition to nutrient supply, maternal adiponectin inhibits fetal growth by increasing IGFBP-1 expression in trophoblast cells.
AIMS/HYPOTHESIS: The main objective of this study was to investigate whether maternal adiponectin regulates fetal growth through the endocrine system in the fetal compartment. METHODS:Adiponectin knockout (Adipoq (-/-) ) mice and in vivo adenovirus-mediated reconstitution were used to study the regulatory effect of maternal adiponectin on fetal growth. Primary human trophoblast cells were treated with adiponectin and a specific peroxisome proliferator-activated receptor α (PPARα) agonist or antagonist to study the underlying mechanism through which adiponectin regulates fetal growth. RESULTS: The body weight of fetuses from Adipoq (-/-) dams was significantly greater than that of wild-type dams at both embryonic day (E)14.5 and E18.5. Adenoviral vector-mediated maternal adiponectin reconstitution attenuated the increased fetal body weight induced by maternal adiponectin deficiency. Significantly increased blood glucose, triacylglycerol and NEFA levels were observed in Adipoq (-/-) dams, suggesting that nutrient supply contributes to maternal adiponectin-regulated fetal growth. Although fetal blood IGF-1 concentrations were comparable in fetuses from Adipoq (-/-) and wild-type dams, remarkably low levels of IGF-binding protein 1 (IGFBP-1) were observed in the serum of fetuses from Adipoq (-/-) dams. IGFBP-1 was identified in the trophoblast cells of human and mouse placentas. Maternal fasting robustly increased IGFBP-1 levels in mouse placentas, while reducing fetal weight. Significantly low IGFBP-1 levels were found in placentas of Adipoq (-/-) dams. Adiponectin treatment increased IGFBP-1 levels in primary cultured human trophoblast cells, while the PPARα antagonist, MK886, abolished this stimulatory effect. CONCLUSIONS/ INTERPRETATION: These results indicate that, in addition to nutrient supply, maternal adiponectin inhibits fetal growth by increasing IGFBP-1 expression in trophoblast cells.
Authors: Darran N Tosh; Qi Fu; Christopher W Callaway; Robert A McKnight; Isabella C McMillen; Michael G Ross; Robert H Lane; Mina Desai Journal: Am J Physiol Gastrointest Liver Physiol Date: 2010-09-02 Impact factor: 4.052
Authors: Elizabeth A DuPriest; Baoyu Lin; Philipp Kupfer; Kaiu Sekiguchi; Amruta Bhusari; Alexandra Quackenbush; Almir Celebic; Terry K Morgan; Jonathan Q Purnell; Susan P Bagby Journal: Am J Physiol Regul Integr Comp Physiol Date: 2018-06-20 Impact factor: 3.619