Targeting: Renal Pathology, Pharmacology
A 58-year-old male with a history of hypertension and long-standing type 2 diabetes mellitus presents for a routine follow-up. He reports recent fatigue and generalized puffiness. Physical examination reveals 2+ pitting edema in both lower extremities. Laboratory studies show a serum creatinine of 2.1 mg/dL (baseline 1.2 mg/dL) and 4+ proteinuria on dipstick. A renal biopsy is performed, showing nodular glomerulosclerosis (Kimmelstiel-Wilson nodules).
Which of the following mechanisms is primarily responsible for the development of these characteristic histological findings?