Neurodegeneration Marker in Leber Hereditary Optic Neuropathy
Author Information
Author(s): Guy John, Shaw Gerry, Ross-Cisneros Fred N., Quiros Peter, Salomao Solange R., Berezovsky Adriana, Carelli Valerio, Feuer William J., Sadun Alfredo A.
Primary Institution: Bascom Palmer Eye Institute, McKnight Vision Research Center, Miami, FL
Hypothesis
The study aims to determine the profile of neurodegeneration in Leber hereditary optic neuropathy (LHON) by quantifying serum levels of phosphorylated neurofilament heavy chain (pNF-H).
Conclusion
Elevated pNF-H levels in some LHON patients suggest ongoing axonal degeneration after visual function loss, while carriers show increasing pNF-H levels with age, indicating potential subclinical optic nerve degeneration.
Supporting Evidence
- The study found a significant correlation between pNF-H levels and age in the carrier group.
- Affected individuals had higher mean pNF-H levels compared to carriers.
- No correlation was found between age and pNF-H levels in the off-pedigree group.
Takeaway
This study looked at a special protein in the blood that can show if nerve damage is happening in people with a specific eye disease. They found that some people with the disease have higher levels of this protein, which might mean their nerves are getting hurt even after they lose their sight.
Methodology
The study measured serum pNF-H levels in 16 affected LHON patients and 59 carriers, using multiple regression and various statistical tests to analyze the data.
Limitations
The study could not obtain blood samples from patients at the time of initial visual loss, which may affect the understanding of the timing of axonal injury.
Participant Demographics
The average age of affected patients was 42 years, with a 7:1 male predominance; carriers had an average age of 36 years with a 2:1 female predominance.
Statistical Information
P-Value
p=0.022
Statistical Significance
p<0.05
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