Reference : Opposing Actions of Intact and N-Terminal Fragments of the Human Prolactin/Growth Hormon...
Scientific journals : Article
Life sciences : Biochemistry, biophysics & molecular biology
http://hdl.handle.net/2268/12214
Opposing Actions of Intact and N-Terminal Fragments of the Human Prolactin/Growth Hormone Family Members on Angiogenesis: An Efficient Mechanism for the Regulation of Angiogenesis
English
Struman, Ingrid mailto [Université de Liège - ULg > Département des sciences de la vie > Biologie et génétique moléculaire >]
Bentzien, F. [> > > >]
Lee, H. [> > > >]
Mainfroid, V. [> > > >]
D'Angelo, Gisela [> > > >]
Goffin, Vincent [> > > >]
Weiner, R. I. [Université de Liège - ULg > Département des sciences de la vie > GIGA-R : Biologie et génétique moléculaire >]
Martial, Joseph mailto [> > > >]
10-Feb-1999
Proceedings of the National Academy of Sciences of the United States of America
96
4
1246-51
Yes (verified by ORBi)
International
0027-8424
[en] Angiogenesis, the process of development of a new microvasculature, is regulated by a balance of positive and negative factors. We show both in vivo and in vitro that the members of the human prolactin/growth hormone family, i.e., human prolactin, human growth hormone, human placental lactogen, and human growth hormone variant are angiogenic whereas their respective 16-kDa N-terminal fragments are antiangiogenic. The opposite actions are regulated in part via activation or inhibition of mitogen-activated protein kinase signaling pathway. In addition, the N-terminal fragments stimulate expression of type 1 plasminogen activator inhibitor whereas the intact molecules have no effect, an observation consistent with the fragments acting via separate receptors. The concept that a single molecule encodes both angiogenic and antiangiogenic peptides represents an efficient model for regulating the balance of positive and negative factors controlling angiogenesis. This hypothesis has potential physiological importance for the control of the vascular connection between the fetal and maternal circulations in the placenta, where human prolactin, human placental lactogen, and human growth hormone variant are expressed.
http://hdl.handle.net/2268/12214

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