hrp0089fc4.3 | GH & IGFs | ESPE2018

The Reduction in Longitudinal Growth Induced By PAPP-A2 Deficiency is Associated with Reduced Body Weight, Increased Energy Expenditure and Behavior Modification

Suarez Juan , Rivera Patricia , Vargas Antonio , Rubio Leticia , de Fonseca Fernando Rodriguez , Chowen Julie , Argente Jesus

Background: Pregnancy associated plasma protein (PAPP)-A2 is an insulin-like growth factor (IGF) binding protein (BP) protease that regulates IGF-1 availability, affecting postnatal growth. We have recently reported the first mutations in human PAPP-A2 causing short stature and changes in bone size and mineral density. However, the IGF system is involved in diverse physiological functions and to date it is unknown how mutations in PAPP-A2, which significantly reduce f...

hrp0089fc6.4 | Fat, Metabolism and obesity | ESPE2018

Identification of the First Obesity-Associated Mutations in Human Mesoderm-Specific Transcript (MEST) Result in Protein Overexpression, Adipocyte Hypertrophy and a Reduction in Adipocyte Mitochondrial Area

Suarez Juan , Martos-Moreno Gabriel , Rivera Patricia , Serra-Juhe Clara , Chowen Julie , Perez-Jurado Luis , Argente Jesus

Background: Mesoderm-specific transcript (MEST) is an epoxide α/β-hydrolase protein with catalytic activity that is determinant for the development of adipocytes. The MEST gene is an imprinted gene transcribed only from the paternal allele. Although the mechanism by which MEST overexpression augments fat accumulation and storage in adipocytes has not been fully elucidated, frequent subcellular contacts between MEST-positive endoplasmic reticulum, mi...