Abstract
Maternal dietary supplementation with l-glutamine (Gln) has been considered as an option to improve fetal growth and to prevent the occurrence of intrauterine growth restriction (IUGR). This study investigated whether maternal Gln supplementation could improve fetal growth as well as the intestinal development during late pregnancy. Sixty pregnant Landrace × Large White multiparous sows were assigned to two groups, either the group fed the control diet or the group with the diet supplemented with 1% Gln from d 85 of gestation until farrowing. One normal body weight piglet and one IUGR piglet were obtained from six litters in each group. Reproductive performance, plasma concentrations of free amino acids and related metabolites as well as piglet growth and tissue indexes were determined. Maternal Gln supplementation during late gestation increased the average birth weight, while decreasing the within-litter variation of newborn piglets. The concentrations of Gln in plasma were lower in IUGR piglets than in normal piglets. Glutamine supplementation enhanced Gln concentrations in maternal and piglet plasma and the piglet jejunum, compared with the Control group. Supplementing Gln suppressed intestinal miR-29a levels, and increased the abundance of extracellular matrix (ECM) and tight junction (TJ) proteins, resulting in increased intestinal weight and improved morphologies of the piglets. Collectively, Gln supplementation to the sow’s diet increased fetal growth, decreased the within-litter variation of newborn piglets, and alleviated the IUGR-induced intestinal impairment. These findings suggest the possibility of maternal glutamine supplementation in the prevention and treatment of IUGR in animal production and human medicine.
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Abbreviations
- ECM:
-
Extracellular matrix
- GAPDH:
-
Glyceraldehyde-3-phosphate dehydrogenase
- Gln:
-
l-Glutamine
- HPLC:
-
High-performance liquid chromatography
- IBS:
-
Irritable bowel syndrome
- IUGR:
-
Intrauterine growth restriction
- miRNA:
-
MicroRNA
- MSG:
-
Monosodium glutamate
- NBW:
-
Normal body weight
- qRT-PCR:
-
Real-time quantitative polymerase chain reaction
- TJ:
-
Tight junction
- ZO-1:
-
Zonula occludens protein-1
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (nos. 31272449, 31422052 and 31630074), the Beijing Municipal Natural Science Foundation (no. S170001), the National Key Research and Development Program of China (no. 2016YFD0500506), the 111 Project (no. B16044), Jinxinnong Animal Science Developmental Foundation and Hunan Co-Innovation Center of Animal Production Safety, CICAPS.
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This article does not contain any studies with human participants performed by any of the authors. This research involves animals (pigs). The animal use protocols in this study were reviewed and approved by the China Agricultural University Animal Care and Use Committee (CAU20140508-1, Beijing, China).
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Zhu, Y., Li, T., Huang, S. et al. Maternal l-glutamine supplementation during late gestation alleviates intrauterine growth restriction-induced intestinal dysfunction in piglets. Amino Acids 50, 1289–1299 (2018). https://doi.org/10.1007/s00726-018-2608-5
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DOI: https://doi.org/10.1007/s00726-018-2608-5