Abstract
Objective
Familial Dysautonomia (FD) disease, lacks a useful biomarker for clinical monitoring. In this longitudinal study we characterized the structural changes in the macula, peripapillary and the optic nerve head (ONH) regions in subjects with FD.
Methods
Data was consecutively collected from subjects attending the FD clinic between 2012 and 2019. All subjects were imaged with spectral-domain Optical Coherence Tomography (OCT). Global and sectoral measurements of mean retinal nerve fiber layer (RNFL) and macular ganglion cell and inner plexiform layer (GCIPL) thickness, and ONH parameters of rim area, average cup-to-disc (C:D) ratio, and cup volume were used for the analysis. The best fit models (linear, quadratic and broken stick linear model) were used to describe the longitudinal change in each of the parameters.
Results
91 subjects (149 eyes) with FD of ages 5–56 years were included in the analysis. The rate of change for average RNFL and average GCIPL thicknesses were significant before reaching a plateau at the age of 26.2 for RNFL and 24.8 for GCIPL (− 0.861 µm/year (95% CI − 1.026, − 0.693) and − 0.553 µm/year (95% CI − 0.645, − 0.461), respectively). Significant linear rate of progression was noted for all ONH parameters, except for a subset of subjects (24%), with no cupping that did not show progression in any of the ONH parameters.
Conclusions
The rapidly declining RNFL and GCIPL can explain the progressive visual impairment previously reported in these subjects. Among all structural parameters, ONH parameters might be most suitable for longitudinal follow-up, in eyes with a measurable cup.
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Data availability
The data that support the findings of this study are available from the corresponding author upon reasonable request.
Code availability
Not availanble.
Change history
02 January 2021
A Correction to this paper has been published: https://doi.org/10.1007/s00415-020-10361-0
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Funding
NIH R01-EY013178, a grant from the Familial Dysautonomia Foundation, and unrestricted grant from Research to Prevent Blindness. The sponsor or funding organization had no role in the design or conduct of this research.
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Conceptualization: HK; methodology: LN-K and HK; formal analysis and investigation: JK, MW, ML, and GW; writing—original draft preparation: JK and GW; writing—review and editing: LR, JSS, HI, IMV, CM-S, JAP, LN-K, BM, and HK; funding acquisition: JSS and HK.
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Joel S. Schuman: Royalties from intellectual property licensed by Massachusetts institute of Technology and Massachusetts Eye and Ear infirmary to Zeiss. None of the other authors have any conflict of interest to declare.
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The institutional review board and ethics committee at NYU Langone Health approved the study. The study has been performed in accordance with the ethical standards laid down in the Declaration of Helsinki. Enrollment was voluntary and a written informed consent was obtained from all subjects or their legal proxy.
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Kfir, J., Wu, M., Liu, M. et al. Longitudinal changes in the macula and optic nerve in familial dysautonomia. J Neurol 268, 1402–1409 (2021). https://doi.org/10.1007/s00415-020-10298-4
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DOI: https://doi.org/10.1007/s00415-020-10298-4