Drug Development

Area of Science:

• Neurology
• Gerontology
• Pharmacology

Background:

• Oxidative stress is linked to vascular mild cognitive impairment (vMCI), affecting executive function and memory.
• Aerobic exercise may improve cognition but can increase oxidative stress.
• N-acetylcysteine (NAC) is investigated for its potential to replenish glutathione and mitigate exercise-induced oxidative stress.

Purpose of the Study:

• To evaluate the efficacy and safety of oral NAC in improving cognitive function in vMCI patients.
• To determine if NAC provides additional cognitive benefits when combined with a cardiac rehabilitation program.

Main Methods:

• A 24-week randomized clinical trial involving vMCI patients with significant cardiovascular disease.
• Participants received either NAC (2400mg/day) or a placebo.
• Cognitive function, particularly executive function, was assessed using a neuropsychological battery; data analyzed with mixed-effects models.

Main Results:

• Executive function improved over time in all participants (p<0.001).
• No significant cognitive differences were observed between the NAC and placebo groups (p=0.7).
• NAC was well-tolerated, with similar adverse events between groups.

Conclusions:

• NAC supplementation did not enhance cognitive benefits beyond cardiac rehabilitation for vMCI patients.
• The study suggests NAC is safe but not superior to exercise alone for cognitive improvement in this population.