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- W2970012944 abstract "Abstract Objective In the mouse model, manipulations of assisted reproductive technology (ART) can lead to enlarged placentas and influence the expression of glucose transporters (GLUTs) in placentas during mid-to late-gestation. Expression of imprinted genes which plays a vital role in placental growth and function, is also vulnerable to be affected by ART. However, it is uncertain whether those abnormal changes presented in ART mouse placentas also occur in human ART placentas. Methods We compared the expression of GLUT family genes (SLC2A1- SLC2A13), mTOR activity, the expression of four imprinted genes (H19, IGF2, CDKN1C and PHLDA2), and KCNQ1OT1 methylation in human placentas conceived naturally or by ART. Results Our data showed that the placental weight and birthweight were similar between NC (n = 20) and ART group (n = 20). We found that up-regulated mRNA expression of GLUTs and elevated GLUT1 protein level occurred in human ART placentas with unchanged mTOR activity. And we found that mRNA and protein expression of PHLDA2 were significantly increased in ART placentas compared with placentas from natural pregnancies. Additionally, we revealed that ART placentas had increased expression of KCNQ1OT1 which negatively controls PHLDA2 expression. Conclusion This study reveals that the increased expression of GLUTs occurs in human ART placentas with normal mTOR activity. The down-regulated expression of imprinted gene PHLDA2 may account for the up-regulation of GLUTs. Those adaptive changes in ART placentas may explain why most of ART offspring have normal birth weight at born." @default.
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- W2970012944 date "2019-10-01" @default.
- W2970012944 modified "2023-10-17" @default.
- W2970012944 title "The increased expression of glucose transporters in human full-term placentas from assisted reproductive technology without changes of mTOR signaling" @default.
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- W2970012944 doi "https://doi.org/10.1016/j.placenta.2019.08.087" @default.
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