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Published on: November 3, 2016
MicroRNA Profile Differences in Neonates at Risk for Cerebral Palsy
S D Chapman1, L Farina2, K Kronforst3
1United States Naval Hospital Okinawa, 18 Medical Group, Kadena Air Base, Okinawa, Japan.
Insights
Plasma microRNA profiles in at-risk neonates differ based on cerebral palsy risk factors like abnormal tone and intraventricular hemorrhage, showing potential for early CP prediction.
Area of Science:
- Neonatal research
- Biomarker discovery
- Genomics
Background:
- Cerebral palsy (CP) diagnosis is delayed until 18-24 months.
- Biomarkers are needed for early CP prediction and therapy assessment.
- MicroRNAs (miRs) are established disease biomarkers.
Purpose of the Study:
- To investigate if plasma miR profiles differ in neonates with CP risk factors.
- To identify potential miR biomarkers for CP prediction.
Main Methods:
- Cohort study of 31 high-risk neonates (<32 weeks gestation, <1500g).
- Plasma samples analyzed using locked nucleic acid quantitative real-time PCR (qRT-PCR).
- miR profiles compared based on presence/absence of intraventricular hemorrhage (IVH) and abnormal tone.
Main Results:
- Significant differences in plasma miR profiles were observed between neonates with and without IVH.
- Distinct miR profiles were found in neonates with and without abnormal tone.
- Greater differences in miR profiles were noted in the abnormal tone comparison versus the IVH comparison.
Conclusions:
- Plasma miR profiles demonstrate potential as predictive biomarkers for cerebral palsy.
- This study identified potential miR candidates for future research in CP.
Background:
MicroRNAs; miRs are used as biomarkers in the diagnosis of several diseases. Cerebral palsy; CP, resulting from perinatal brain injury, cannot be diagnosed until 18-24 months old. Biomarkers to predict CP and assess response to investigational therapies are needed. We hypothesized that miRs expressed in neonates with the CP risk factors of abnormal tone and/or intraventricular hemorrhage; IVH differ from those without risk factors.
Methods:
This was a cohort study of neonates at risk for CP. Subjects <32 weeks gestation and <1500 grams were recruited from neonatal intensive care units at a large urban delivery hospital and an adjacent children's hospital. Thirty-one plasma samples were evaluated. An unbiased examination was performed by locked nucleic acid quantitative real time - polymerase chain reaction; qRT-PCR. Results were evaluated in the context of IVH and abnormal tone.
Results:
Plasma miR profiles in neonates at risk for CP differ when comparing those with and without IVH, and with and without abnormal tone. Restricted profiles were found in each condition with greater differences in the tone comparison than the IVH comparison.
Conclusion:
Plasma miR profiles show potential in predicting CP. This study also suggests biologically plausible candidates for future studies.
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