ArticleInternational journal of molecular sciences2022
SLC38A4 Amino Acid Transporter Expression Is Significantly Lower in Early Preterm Intrauterine Growth Restriction Complicated Placentas.
Article in International journal of molecular sciences, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.
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Who cites it
7 citing papers in PubMed, 1 synthesis or guideline pooled it, 7 citations in OpenAlex.
- Placental expression and activity of system A and system L amino acid transporters in pregnancies complicated by diabetes mellitus and fetal growth disorders: a systematic review.Frontiers in endocrinology · 2026Pooled it
- Trophoblast adaptation to hypoxia: balance and dysfunction.Cell communication and signaling : CCS · 2025Review
- [Prenatal fear stress impairs cognitive development in offspring rats by disrupting placental amino acid transport].Nan fang yi ke da xue xue bao = Journal of Southern Medical University · 2025Article
- Pregnancy Metabolic Adaptation and Changes in Placental Metabolism in Preeclampsia.Geburtshilfe und Frauenheilkunde · 2024Article
- Regulation of placental amino acid transport in health and disease.Acta physiologica (Oxford, England) · 2024Review
- Maternal Supplementation with Ornithine Promotes Placental Angiogenesis and Improves Intestinal Development of Suckling Piglets.Animals : an open access journal from MDPI · 2024Article
- Pathogenesis of Pregnancy-Related Complications.International journal of molecular sciences · 2023Article
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Authors and funding
6 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Intrauterine growth restriction (IUGR), predominantly caused by placental insufficiency, affects partitioning of nutrients to the fetus. The system A sodium-coupled transporters (SNAT or SLC38), of types A1, A2, and A4, control non-essential amino acid uptake and supply. Here, we aimed to investigate the expression of these transporters across different placental disease cohorts and cells. To determine disease impact, transporter expressions at the gene (qPCR) and protein (western blots) level were assessed in gestationally matched placental tissues. Early (<34 weeks), and late (34−36 weeks) onset IUGR cases with/out preeclampsia were compared to preterm controls. We also investigated level of transporter expression in primary trophoblasts under glucose deprivation (n = 6) and hypoxia conditions (n = 7). SLC38A4 protein was significantly downregulated in early preterm pregnancies complicated with IUGR with/out preeclampsia. There were no differences in late preterm IUGR cohorts. Furthermore, we demonstrate for the first time in primary trophoblast cells, that gene expression of the transporters was sensitive to and induced by glucose starvation. SLC38A4 mRNA expression was also significantly upregulated in response to hypoxia. Thus, SLC38A4 expression was persistently low in early preterm IUGR pregnancies, regardless of disease aetiology. This suggests that gestational age at delivery, and consequently IUGR severity, may influence loss of its expression.
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