Clinical trial NCT01019902: Impact of Maternal Iron Status on Neonatal Iron Status and Auditory Brainstem Response in the Newborn
Official title: Impact of Maternal Iron Status on Neonatal Iron Status and Auditory Brainstem Response in the Newborn
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Anemia
Keywords: iron
pregnancy
adolescents
auditory brainstem responses
anemia
neonate
Lead sponsor: Cornell University
Sponsor class: OTHER
Collaborators: name: University of Rochester
First posted: 2009-11-25
Enrollment: 144
Sex: ALL
Minimum age (years): 1
Maximum age (years): 18
Standard ages: CHILD
ADULT
Accepts healthy volunteers: yes
Observational model: CASE_ONLY
Time perspective: CROSS_SECTIONAL
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Pregnant adolescents in Rochester, NY.

Brief summary: This study aims to determine how maternal Fe status influences placental and neonatal Fe status in pregnant adolescents and to assess the impact of the Fe endowment of birth on functional outcomes as assessed by auditory brainstem responses within 48 h of delivery in neonates born to these adolescents.


Eligibility criteria: Inclusion Criteria:

* Adolescents (ages 11-18 y) and their newborns will be eligible to participate if the adolescent is carrying a singleton pregnancy, does not have any preexisting medical complications (such as HIV-infection, eating disorders, hemoglobinopathies, malabsorption diseases, steroid use, substance abuse history, or taking medications known to influence iron homeostasis).

Exclusion Criteria:

* Individuals with pregnancy induced hypertension or elevated diastolic blood pressure (\>110) will not be eligible to participate in the study. In addition, adolescents who have been previously treated for lead exposure, or those that have been identified as having elevated blood lead concentrations during childhood, will be excluded from the study.
* Data from infants that experience perinatal asphyxia, pathologic neonatal hyperbilirubinemia, respiratory disease, antibiotic therapy (aminoglycosides), CNS infection, sepsis, congenital or middle or external ear lesions, craniofacial anomalies, chromosomal disorders, TORCH (toxoplasmosis, other infections, rubella, cytomegalovirus infection and herpes simplex infection) or those that were clinically unstable with the first 48 h post-delivery will be excluded from ABR studies. Infants born to mothers with positive drug abuse screens at delivery will also be excluded from further study (these screens are automatically run among this age group). Infants that are identified with hearing deficits at birth using the OAE screening will be excluded from the ABR measures.

Primary outcomes:
measure: Auditory Brainstem Responses (ABR) in Infant
timeFrame: within 24-48 h of birth
Secondary outcomes:
measure: Maternal Fe and micronutrient status (folate, B12, Fe, copper and zinc, hemoglobin, hematocrit,transferrin receptor, hepcidin, erythropoietin, ferritin, erythrocyte zinc protoporphyrin/heme ratios and c-reactive protein)
timeFrame: Delivery
measure: Neonatal Fe and micronutrient status
timeFrame: Delivery
measure: Placental Fe/copper/zinc content and expression of key iron transporters.
timeFrame: Delivery
Other outcomes:
Locations:
city: Rochester
country: United States
facility: Highland Hospital
state: New York
Study officials:
affiliation: Cornell University
name: Kimberly O'Brien, PhD
role: PRINCIPAL_INVESTIGATOR
affiliation: University of Rochester
name: Ronnie Guillet, MD, PhD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Delaney KM, Guillet R, Fleming RE, Ru Y, Pressman EK, Vermeylen F, Nemeth E, O'Brien KO. Umbilical Cord Serum Ferritin Concentration is Inversely Associated with Umbilical Cord Hemoglobin in Neonates Born to Adolescents Carrying Singletons and Women Carrying Multiples. J Nutr. 2019 Mar 1;149(3):406-415. doi: 10.1093/jn/nxy286.
citation: Lumish RA, Young SL, Lee S, Cooper E, Pressman E, Guillet R, O'Brien KO. Gestational iron deficiency is associated with pica behaviors in adolescents. J Nutr. 2014 Oct;144(10):1533-9. doi: 10.3945/jn.114.192070. Epub 2014 Aug 13.
citation: Lee S, Guillet R, Cooper EM, Westerman M, Orlando M, Pressman E, O'Brien KO. Maternal inflammation at delivery affects assessment of maternal iron status. J Nutr. 2014 Oct;144(10):1524-32. doi: 10.3945/jn.114.191445. Epub 2014 Jul 30.
citation: Jaacks LM, Young MF, Essley BV, McNanley TJ, Cooper EM, Pressman EK, McIntyre AW, Orlando MS, Abkowitz JL, Guillet R, O'Brien KO. Placental expression of the heme transporter, feline leukemia virus subgroup C receptor, is related to maternal iron status in pregnant adolescents. J Nutr. 2011 Jul;141(7):1267-72. doi: 10.3945/jn.110.135798. Epub 2011 May 18.