A 38-year-old woman, who was diagnosed with systemic lupus erythematous (SLE) 3 years ago, comes to her physician with a complaint of racial swelling and decreased urination that she first noticed 2 weeks ago. She currently lakes azathioprine and a corticosteroid. Her vital signs show blood pressure - 150/90 mm Hg. temperature 36.8°C and pulse - 91/min., respiratory-rate 15/min. On physical examination. the doctor notices erythematous rash on her face exhibiting a butterfly pattern. The laboratory studies reveal hypercholesterolemia. hypertriglyceridemia and proteinuria. Which of the following is the most likely mechanism or SLE's complication in this patient?