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Updated: May 1, 2026

Mouse In Vivo Placental Targeted CRISPR Manipulation
Published on: April 14, 2023
Altered Expression of miR-518b and miR-519a in the placenta is associated with low fetal birth weight
Dan Wang1, Quan Na1, Wei-Wei Song1
1Department of Obstetrics and Gynecology, Shengjing Hospital, China Medical University, Shenyang, People's Republic of China.
Objectives:
Previous studies have suggested that the expression and function of placenta-specific microRNAs (miRNAs) are associated with placenta trophoblastic proliferation and invasion. This study investigated whether the altered expression of placenta-specific miRNAs was involved in the development of fetal growth.
Methods:
Placenta tissues were obtained from pregnant women with large for gestational age (LGA), intrauterine growth retardation (IUGR), and appropriate for gestational age (AGA) infants (n = 30 in each group). Real-time quantitative reverse transcription-polymerase chain reaction was used to analyze the expression of relative placenta-specific miRNAs in human placental tissues from three different groups.
Results:
Compared with the LGA and healthy control (AGA) groups; the expression of miR-518b was decreased, whereas miR-519a was significantly increased in the placentas from the IUGR group (p < 0.05).
Conclusion:
This study suggests that altered expression of placenta-specific miRNAs (miR-518b and miR-519a) may be involved in the development of IUGR.
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