Trace Elements Associated with Systemic Lupus Erythematosus and Insulin Resistance

Area of Science:

• Environmental Health
• Toxicology
• Immunology
• Metabolic Disorders

Background:

• Systemic lupus erythematosus (SLE) is a complex autoimmune disease influenced by multifactorial origins.
• Trace elements (e.g., zinc, copper) and toxic metals (e.g., lead) play roles in immune function and metabolic processes.
• Previous research suggests potential links between metal exposure and autoimmune conditions.

Purpose of the Study:

• To investigate the association between serum concentrations of specific trace elements and toxic metals and SLE.
• To evaluate the relationship between these elements/metals and SLE disease activity (SLEDAI).
• To examine the correlation between serum metal levels and insulin resistance (IR) in SLE patients.

Main Methods:

• A case-control, cross-sectional study involving 105 SLE patients and 120 healthy controls.
• Serum concentrations of lithium (Li), vanadium (V), copper (Cu), zinc (Zn), molybdenum (Mo), cadmium (Cd), and lead (Pb) were measured.
• Statistical analyses were performed to assess associations with SLE diagnosis, SLEDAI, and IR.

Main Results:

• SLE patients exhibited significantly different serum levels of V, Zn, Pb (lower), and Mo, Li (higher) compared to controls.
• Higher serum Li and lower V, Zn, and Pb concentrations were associated with SLE diagnosis.
• Serum Cd levels were elevated in patients with insulin resistance; no other significant metal associations with IR or disease activity were found.

Conclusions:

• SLE patients present unique serum profiles of trace elements and toxic metals.
• Specific metal concentrations are associated with SLE diagnosis, highlighting their potential role in the disease's pathogenesis.
• These elements and metals do not appear to influence SLE disease activity or insulin resistance.