Oral Intake of Linseed Oil Inhibits Skin Barrier Dysfunction in Obese Mice

Area of Science:

• Dermatology
• Nutritional Science
• Obesity Research

Background:

• Obesity is linked to skin barrier dysfunction, causing dryness and itching, negatively impacting quality of life.
• Existing treatments for obesity-related skin issues are limited, highlighting a need for effective interventions.
• Skin barrier dysfunction in obesity exacerbates dryness, itching, and scratching, necessitating targeted therapeutic strategies.

Purpose of the Study:

• To investigate the efficacy of oral linseed oil supplementation in improving skin barrier function in obese subjects.
• To elucidate the mechanisms by which linseed oil impacts skin barrier integrity and inflammation in obesity.
• To assess the role of alpha-linolenic acid in mediating the observed effects.

Main Methods:

• Obese mice (TSOD) were orally administered linseed oil (Omega group) or water (Control group) for eight weeks.
• Skin barrier function was assessed via transepidermal water loss (TEWL) measurements and histological analysis post-UVB irradiation.
• Inflammatory gene expression, skin and erythrocyte fatty acid profiles, and alpha-linolenic acid levels were analyzed.

Main Results:

• Linseed oil intake significantly reduced TEWL and skin erythema, indicating improved barrier function.
• Histological examination showed a thinner epidermis and reduced cell proliferation in the linseed oil group.
• Oral linseed oil increased alpha-linolenic acid levels, decreased inflammatory markers, and lowered the n-6/n-3 fatty acid ratio.

Conclusions:

• Oral linseed oil effectively inhibits skin barrier dysfunction in obesity.
• The anti-inflammatory effects of alpha-linolenic acid, a key component of linseed oil, mediate this improvement.
• Linseed oil shows promise as a therapeutic agent for managing skin barrier dysfunction associated with obesity.