Redox balance signalling in occupational stress: modification by nutraceutical intervention

Area of Science:

• Cellular Biology
• Nutritional Science
• Biochemistry

Background:

• Psychosocial stress disrupts cellular homeostasis, increasing oxidative stress and inflammation.
• Previous research indicates stress elevates oxidative damage and impacts DNA integrity.

Purpose of the Study:

• To confirm that psychological stress increases oxidative damage.
• To evaluate if a fermented papaya preparation can mitigate stress-induced DNA damage and activate epigenetic defenses.

Main Methods:

• 28 adults with stressful lifestyles received 9g/day of fermented papaya preparation for 1 month.
• Blood samples assessed redox balance and heme oxygenase-1 (HO-1) gene expression.
• Urine tested for bilirubin oxidized metabolites (BOMs); stress/sleep questionnaires administered.

Main Results:

• Stressed individuals exhibited abnormal redox status, increased erythrocyte MDA, elevated leukocyte 8-OHdG, and higher BOMs excretion.
• Supplementation normalized these oxidative stress markers within 2 weeks.
• Fermented papaya significantly upregulated HO-1 gene expression (p<0.01).

Conclusions:

• Occupational stress, even without psychiatric illness, is linked to increased oxidative stress.
• Functional foods like fermented papaya, impacting redox regulation, show therapeutic potential for stress-induced oxidative damage.