Placental mTOR links maternal nutrient availability to fetal growth.

Abstract:

:The mTOR (mammalian target of rapamycin) signalling pathway functions as a nutrient sensor, both in individual cells and, more globally, in organs such as the fat body in Drosophila and the hypothalamus in the rat. The activity of placental amino acid transporters is decreased in IUGR (intrauterine growth restriction), and recent experimental evidence suggests that these changes contribute directly to the restricted fetal growth. We have shown that mTOR regulates the activity of the placental L-type amino acid transporter system and that placental mTOR activity is decreased in IUGR. The present review summarizes the emerging evidence implicating placental mTOR signalling as a key mechanism linking maternal nutrient and growth factor concentrations to amino acid transport in the human placenta. Since fetal growth is critically dependent on placental nutrient transport, placental mTOR signalling plays an important role in the regulation of fetal growth.

journal_name

Biochem Soc Trans

authors

Roos S,Powell TL,Jansson T

doi

10.1042/BST0370295

subject

Has Abstract

pub_date

2009-02-01 00:00:00

pages

295-8

issue

Pt 1

eissn

0300-5127

issn

1470-8752

pii

BST0370295

journal_volume

37

pub_type

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