Oxidative damage and mitochondrial dysfunction in cystathionine beta-synthase deficiency

Area of Science:

• Biochemistry
• Genetics
• Metabolic Disorders

Background:

• Cystathionine beta-synthase deficiency (CBSD) is a common inherited disorder affecting homocysteine metabolism.
• Oxidative stress and inflammation are implicated as potential mechanisms in CBSD pathogenesis.

Purpose of the Study:

• To investigate mitochondrial dysfunction and oxidative stress biomarkers in patients with CBSD.
• To explore the relationship between homocysteine levels and these biomarkers.
• To potentially inform improved treatment strategies for CBSD.

Main Methods:

• Analyzed serum levels of NAD+, NADH, FGF-21, and GDF-15 in 23 CBSD patients and controls.
• Measured mitochondrial damage-associated molecular patterns (DAMPs) using qRT-PCR.
• Assessed plasma total homocysteine levels via enzymatic testing.

Main Results:

• CBSD patients showed altered levels of NAD+, FGF-21, GDF-15, and the NAD+/NADH ratio compared to controls.
• Total homocysteine levels positively correlated with GDF-15 and the NAD+/NADH ratio.
• Total homocysteine levels negatively correlated with total NAD+ + NADH and NADH levels.

Conclusions:

• Findings suggest that oxidative damage and mitochondrial dysfunction coexist in CBSD.
• Targeting oxidative stress and mitochondrial support may offer benefits in managing CBSD morbidity.