Oxidative-Nitrosative Stress and Routine Biochemical Parameters in Amyotrophic Lateral Sclerosis: Associations with...

Area of Science:

• Biochemistry
• Neuroscience
• Clinical Medicine

Background:

• Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease.
• Oxidative-nitrosative stress is implicated in ALS pathogenesis.
• Understanding the relationship between oxidative stress and clinical status is crucial for ALS management.

Purpose of the Study:

• To investigate the association between plasma oxidative-nitrosative stress markers and clinical parameters in ALS patients.
• To explore correlations with ALSFRS-R, disease duration, and survival.
• To analyze relationships with routine biochemical markers.

Main Methods:

• Pilot study of 29 ALS patients.
• Measured plasma levels of 3-nitrotyrosine (3-NT), 8-oxo-2'-deoxyguanosine (8-oxodG), malondialdehyde (MDA), glutathione (GSH), non-protein thiols (NP-SH), and non-protein disulfides (NP-SS-NP).
• Utilized non-parametric correlation, polynomial regression, Kaplan-Meier analysis, and Cox regression, with Benjamini-Hochberg FDR correction.

Main Results:

• 3-nitrotyrosine (3-NT) and non-protein thiols (NP-SH) showed trends correlating with clinical measures but did not reach statistical significance after FDR correction.
• No robust relationships were found between other oxidative-nitrosative markers or biochemical parameters and clinical status.
• Older age was a significant predictor of mortality in Cox models, but 3-NT was not.

Conclusions:

• While 3-NT and NP-SH showed exploratory trends, their clinical relevance in ALS requires confirmation.
• The small sample size limits definitive conclusions.
• Larger, longitudinal studies are necessary to validate these findings and explore the role of oxidative-nitrosative stress in ALS progression.