Autoimmune Diseases · Pathology

What is the primary immunological defect in the development of Type 1 Diabetes Mellitus?

  1. Autoantibody lysis of acinar cells
  2. T-cell mediated pancreatic beta cell destruction
  3. Immune complex deposition in pancreatic ducts
  4. Overproduction of insulin-neutralizing autoantibodies
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Correct answer: T-cell mediated pancreatic beta cell destruction

Type 1 Diabetes is a T-cell mediated autoimmune disease. Islet-infiltrating lymphocytes (insulitis), specifically CD8+ cytotoxic T-cells, destroy the insulin-producing beta cells in the islets of Langerhans.

Difficulty: Medium Question 16 of 20

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