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Expression and role of SNAT3 in the placenta.

Abstract：

:Glutamine is the most versatile amino acid and its plasma concentration is the highest of all amino acid. Many transporters are therefore involved in glutamine uptake or efflux. Glutamine is actively released from the placenta into fetal circulation. In this study, we examined the alteration of transporters that transport glutamine into fetal circulation as gestation progresses. High expression levels of system A and y(+)L were found in the rat placenta in the late period of pregnancy and the expression levels of these transporters increased as gestation progressed (p<0.05). On the other hand, the expression of SNAT3, the system N transporter, was detected in the early period of pregnancy and its expression level decreased as gestation progressed (p<0.05). SNAT3 was also found to be expressed in isolated human primary cytotrophoblast cells and its expression level was decreased by their differentiation into syncytiotrophoblast cells (p<0.05). Since this regulation is closely related to glutamine synthetase expression, SNAT3 may play a key role in providing glutamine corresponding to glutamine synthetase function in the early period of gestation. This is the first report on the expression of SNAT3 in the placenta in the early stage of pregnancy.

journal_name

Placenta

journal_title

Placenta

authors

Yoshioka C,Yasuda S,Kimura F,Kobayashi M,Itagaki S,Hirano T,Iseki K

doi

10.1016/j.placenta.2009.09.009

subject

Has Abstract

pub_date

2009-12-01 00:00:00

pages

1071-7

issue

12

eissn

0143-4004

issn

1532-3102

pii

S0143-4004(09)00305-1

journal_volume

30

pub_type

杂志文章

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