Abstract
Background
Neurofilament light (NfL) has been identified as a biomarker for neuroaxonal damage in preterm infants, but its relation with bronchopulmonary dysplasia (BPD) has not been established. We hypothesized that BPD is associated with increased NfL levels at an early stage, indicative of early neuroaxonal damage.
Methods
We included preterm infants born <30 weeks of gestation for assessment of NfL levels from cord blood and blood obtained at postnatal days 3, 7, 14, and 28. We used linear regression analysis to compare NfL levels between infants with moderate/severe BPD and infants with no/mild BPD, and linear mixed model analysis to compare the effect of time on NfL levels between groups.
Results
Sixty-seven infants with a gestational age (GA) of 27 ± 1.3 weeks were included for analysis, of whom 19 (28%) developed moderate/severe BPD. Although NfL levels were higher at every time point in infants with BPD, statistical significance was lost after adjustment for GA, small for gestational age (SGA) and intraventricular hemorrhage (IVH). Groups did not differ in NfL change over time.
Conclusions
The positive association between BPD and NfL in the first weeks of life could be explained by GA, SGA and IVH rather than by development of BPD.
Impact
-
Neurofilament light chain (NfL) is a known biomarker for neuroaxonal damage.
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Biomarkers for brain damage during the first weeks of life in preterm infants developing BPD are lacking.
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NfL levels obtained during the first weeks of life did not differ between infants with and without BPD in analyses adjusted for GA, SGA, and IVH.
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Data availability
The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Funding
This research was supported by the Amsterdam Reproduction & Development Research Institute.
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M.R. made substantial contributions to conception and design, acquisition of data, or analysis and interpretation of data, drafted and revised the article, and approved the final version to be published. E.M.B., B.I.L.-W., W.O., H.H., and M.J.J.F. made substantial contributions to conception and design, acquisition of data, or analysis and interpretation of data, revised it critically for important intellectual content, and approved the final version to be published. M.K., J.O., J.R., A.H.v.K., and C.E.T. made substantial contributions to interpretation of the data, revised the manuscript critically for important intellectual content, and approved the final version to be published.
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Written informed consent for participant and publication of the study results was obtained from all parents. The study was approved by the Medical Ethics Committee of the VU University Medical Center (protocol number 2019.371).
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Romijn, M., Baas, E.M., Lissenberg-Witte, B.I. et al. Bronchopulmonary dysplasia is not related to neurofilament light for neuroaxonal damage in preterm infants. Pediatr Res 93, 2014–2018 (2023). https://doi.org/10.1038/s41390-022-02365-5
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DOI: https://doi.org/10.1038/s41390-022-02365-5