Abstract
Objective
To describe relationship between cord blood (representing fetal) myo-inositol concentrations and gestational age (GA) and to determine trends of blood concentrations in enterally and parenterally fed infants from birth to 70 days of age.
Design/Methods
Samples were collected in 281 fed or unfed infants born in 2005 and 2006. Myo-inositol concentrations were displayed in scatter plots and analyzed with linear regression models of natural log-transformed values.
Results
In 441 samples obtained from 281 infants, myo-inositol concentrations varied from nondetectable to 1494 μmol/L. Cord myo-inositol concentrations decreased an estimated 11.9% per week increase in GA. Postnatal myo-inositol concentrations decreased an estimated 14.3% per week increase in postmenstrual age (PMA) and were higher for enterally fed infants compared to unfed infants (51% increase for fed vs. unfed infants).
Conclusions
Fetal myo-inositol concentrations decreased with increasing GA. Postnatal concentrations decreased with increasing PMA and were higher among enterally fed than unfed infants.
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Data availability
Data reported in this paper may be requested through a data use agreement. Further details are available at https://neonatal.rti.org/index.cfm?fuseaction=DataRequest.Home.
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Acknowledgements
The National Institutes of Health and the Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), through the Neonatal Research Network and the Pediatric Pharmacology Research Units Network, and the National Eye Institute provided grant support for the Inositol Cross-Sectional Blood study. The study was planned in 2004; recruitment was in 2005–2006. While NICHD staff did have input into the study design, conduct, analysis, and manuscript drafting, the content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health. Data collected at participating sites of the NICHD Neonatal Research Network (NRN) were transmitted to RTI International, the data coordinating center (DCC) for the network, which stored, managed, and analyzed the data for this study. On behalf of the NRN, Dr. Abhik Das (DCC Principal Investigator) and Ms. Lisa Wrage (DCC Statistician) had full access to all the data in the study and take responsibility for the integrity of the data and accuracy of the data analysis. The NICHD Pediatric Pharmacology Research Unit (PPRU) network provided support and advice in designing the PK study (JVA, JVDA, AAV, SEK, RMW), analyzing the data (SEK), and conducting the Inositol Assay (RDL): Jacob V. Aranda, MD PhD FRCPC, Wayne State University (U10 HD37261); John van der Anker, MD, Children’s National Medical Center (U10 HD45993); Steven E. Kern, PhD, College of Pharmacy, Robert M. Ward, MD, Department of Pediatrics, University of Utah Medical Center (U10 HD45986); Alexander A. Vinks, PharmD PhD FCP, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati (U10 HD37249); Richard D. Leff, PharmD FCCP, Texas Tech University Health Sciences Center, Pediatric Pharmacology Research & Development Center (U10 HD46000). We are indebted to our medical and nursing colleagues and the infants and their parents who took part in this study.
Eunice Kennedy Shriver National Institute of Child Health and Human Development Neonatal Research Network
Alan H. Jobe17, Michael S. Caplan18, Abbot R. Laptook19, Angelita M. Hensman19, Ronald N. Goldberg20, Kathy J. Auten20, Stephanie Wilson Archer21, James A. Lemons22, Dianne E. Herron22, Leslie Dawn Wilson22, W. Kenneth Poole23, Jeanette O’Donnell Auman23, Betty K. Hastings23, Norbert T. Kadima23, James W. PickettII23, Lisa A. Wrage23, Patricia Chess27, Linda J. Reubens27, Erica Burnell27, Mary Rowan27, Cassandra A. Horihan27, Nancy J. Peters28, Richard A. Ehrenkranz29, Patricia Gettner29, Monica Konstantino29, Joann Poulsen29, Janet Taft29.
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Brion, L.P., Phelps, D.L., Ward, R.M. et al. Blood myo-inositol concentrations in preterm and term infants. J Perinatol 41, 247–254 (2021). https://doi.org/10.1038/s41372-020-00799-5
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DOI: https://doi.org/10.1038/s41372-020-00799-5
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