Abstract
Background
Maternal body size, nutrition, and hyperglycemia contribute to neonatal body size and composition. There is little information on maternal-fetal transmission of messages which influence fetal growth. We analyzed adipocyte-derived small extracellular vesicular (ADsEV) microRNAs in maternal and cord blood to explore their adipogenic potential.
Methods
There were 279 mother-neonate pairs with all phenotypic data (normal glucose tolerant NGT = 148, gestational diabetes mellitus GDM = 131). Neonates with adiposity were those in the highest tertile (T3) of sex-specific sum of skinfolds and those without adiposity (lean) in the lowest tertile T1 of NGT pregnancies. We studied ADsEV miRNAs in 76 and 51 neonates with and without adiposity respectively and their mothers based on power calculations (68 NGT and 59 GDM pregnancies). ADsEV miRNAs from maternal and cord blood plasma samples were profiled on Agilent 8*60 K microarray. Differential expression (DE) of ADsEV miRNAs in adipose vs. lean groups was studied before and after adjustment for maternal GDM, adiposity, and vitamin B12-folate status.
Results
Multiple miRNAs were common in maternal and cord blood and positively correlated. We identified 24 maternal and 5 cord blood miRNAs differentially expressed (discovery p ≤ 0.1) in the adipose group in unadjusted, and 19 and 26, respectively, in the adjusted analyses. Even though DE miRNAs were different in maternal and cord blood, they targeted similar adipogenic pathways (e.g., the forkhead box O (FOXO) family of transcription factors, mitogen‑activated protein kinase (MAPK) pathway, transforming growth factor beta (TGF-β) pathway). Maternal GDM and adiposity were associated with many DE ADsEV miRNAs.
Conclusion
Our results suggest that the ADsEV miRNAs in mothers are potential regulators of fetal adiposity. The expression and functionality of miRNAs appear to be influenced by maternal adiposity, hyperglycemia, and micronutrient status during pregnancy.
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Data availability
The raw microarray data is available at Gene Expression Omnibus (Accession ID: GSE217933). The demographic, and phenotypic data is available with the authors and can be made available for a reasonable request following institutional clearances.
Code availability
Code used for calculating differential expression of miRNAs can be accessed from GitHub on the following address: https://github.com/poojakunte24/IJO_ADsEV_manuscript/tree/f16066c106f8ed7f7725b8d4eba67cc14646b2b8.
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Acknowledgements
The authors thank Deepa Raut, Neelam Memane, Sayali Wadke and Rajashree Kamat for their help in processing cord blood samples and laboratory assays. Madhura Deshmukh for help in study coordination. Mrs. Pallavi Yajnik and Rasika Ladkat for administrative help. Dr. Leelavati Narlikar for her guidance in data analysis. Dr. Satyajit Rath for his advice in writing the discussion. We also thank the co-investigators of the InDiaGDM study Dr. Giriraj Chandak, Kalyanaraman Kumaran, Dr. Gundu Rao for their valuable contribution in conducting the InDiaGDM study.
Funding
The work was supported by InDiaGDM grant of the Department of Biotechnology, New Delhi, India (BT/IN/Denmark/02/CSY/2014) and National Institute of Health (NIH), the U.S government (R21HD094127-01).
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CSY designed the InDiaGDM study. CSY and HD contributed to managing the clinical cohort. DB, RKK, BH, ES, MB contributed to exosome extraction and protocol standardization. SR contributed to microRNA data generation. PSK, PT, MB, RKK, KA, MG contributed to the data analysis. PSK, MB, CSY, and RF contributed to the manuscript writing. CSY and RF contributed to the discussion and interpretation of the results. All authors read and approved the manuscript.
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Kunte, P., Barberio, M., Tiwari, P. et al. Neonatal adiposity is associated with microRNAs in adipocyte-derived extracellular vesicles in maternal and cord blood, a discovery analysis. Int J Obes 48, 403–413 (2024). https://doi.org/10.1038/s41366-023-01432-z
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DOI: https://doi.org/10.1038/s41366-023-01432-z