Article (Scientific journals)
Hyperglycosylated human chorionic gonadotropin stimulates angiogenesis through TGF-beta receptor activation.
Berndt, Sarah; Blacher, Silvia; Munaut, Carine et al.
2013In FASEB Journal, 27 (4), p. 1309-21
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Keywords :
angiostimulation; mural cells; endothelial cells; placenta; choriocarcinoma
Abstract :
[en] Embryo implantation requires extensive angiogenesis at the maternal-fetal interface. Hyperglycosylated human chorionic gonadotropin (hCG-H), a trophoblast invasive signal produced by extravillous cytotrophoblasts and by choriocarcinoma, was evaluated for its angiogenic role. hCG-H was purified by HPLC from choriocarcinoma supernatant, and the glycosylation pattern was determined by 2D gel analysis. Angiogenesis models used were aortic ring assay with wild-type and LHCGR-knockout mice, endothelial and mural cell proliferation, and migration assays. The TGF-beta signaling pathway was studied by coimmunoprecipitation, competitive binding, TGF-beta reporter gene assays, and Smad immunoblotting. hCG-H displayed a potent angiogenic effect [3.2-fold increase of number of vessel intersections in wild-type aortic rings (11.406 to 36.964)]. hCG-H-induced angiostimulation was independent of the classic hCG signaling pathway since it persisted in LHCGR-knockout mice [4.73-fold increase of number of vessel intersections (10.826 to 51.288)]. Using TGF-beta signaling inhibitors, Tbeta-RII was identified as the hCG-H receptor responsible for its angiogenic switch. hCG-H exposure enhanced phosphorylation of Smad 2 in endothelial and mural cells and genomic activation of Smad-responsive elements. Interaction between hCG-H and Tbeta-RII was demonstrated by coimmunoprecipitation and binding competition with (125)I-TGF-beta. This new paracrine interaction between trophoblast and endothelial cells through the hCG-H and the TGF-beta receptor complex plays a key role in angiogenesis associated with placental development and tumorigenesis.
Disciplines :
Reproductive medicine (gynecology, andrology, obstetrics)
Author, co-author :
Berndt, Sarah
Blacher, Silvia ;  Université de Liège - ULiège > Département des sciences cliniques > Labo de biologie des tumeurs et du développement
Munaut, Carine  ;  Université de Liège - ULiège > Département des sciences cliniques > Labo de biologie des tumeurs et du développement
Detilleux, Julien 
Perrier d'Hauterive, Sophie ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Embryologie
Huhtaniemi, Ilpo
Evain-Brion, Daniele
Noël, Agnès ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Biologie cellulaire et moléculaire appliquée à l'homme
Fournier, Thierry
Foidart, Jean-Michel ;  Université de Liège - ULiège > Département des sciences cliniques > Gynécologie - Obstétrique
Language :
English
Title :
Hyperglycosylated human chorionic gonadotropin stimulates angiogenesis through TGF-beta receptor activation.
Publication date :
2013
Journal title :
FASEB Journal
ISSN :
0892-6638
eISSN :
1530-6860
Publisher :
Federation of American Society for Experimental Biology, Bethesda, United States - Maryland
Volume :
27
Issue :
4
Pages :
1309-21
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 17 January 2013

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