Psoriasis alters HDL composition and cholesterol efflux capacity

Area of Science:

• Cardiovascular Research
• Dermatology
• Lipid Metabolism

Background:

• Psoriasis is a chronic inflammatory skin disease associated with higher risks of myocardial infarction and stroke.
• Functional impairment of high-density lipoprotein (HDL) may explain increased cardiovascular mortality in psoriasis patients.
• Limited data exist on how psoriasis affects HDL composition and function.

Purpose of the Study:

• To investigate the impact of psoriasis on HDL composition and function.
• To explore the relationship between HDL alterations and cardiovascular disease risk in psoriasis.

Main Methods:

• Isolated HDL from psoriasis patients and healthy controls using ultracentrifugation.
• Analyzed HDL composition using shotgun proteomics and biochemical methods.
• Assessed HDL's cholesterol efflux capacity and anti-oxidative activity.

Main Results:

• Psoriatic HDL showed reduced apolipoprotein A-I (apoA-I) and lower phospholipid/cholesterol content.
• Levels of apoA-II and acute-phase/immune response proteins were increased in psoriatic HDL.
• Impaired cholesterol efflux from macrophages by psoriatic HDL correlated negatively with disease severity.
• Anti-oxidative activity of psoriatic HDL was comparable to controls.

Conclusions:

• Psoriatic HDL exhibits a pro-inflammatory profile due to compositional changes.
• Reduced cholesterol efflux capacity of psoriatic HDL may contribute to cardiovascular disease risk.
• HDL dysfunction offers a potential link between psoriasis and cardiovascular complications.