Final answer:
A patient who lacks expression of autoimmune regulator (aire) protein would observe increased susceptibility to autoimmune diseases.
Step-by-step explanation:
A patient who lacks expression of autoimmune regulator (aire) protein would observe increased susceptibility to autoimmune diseases.
The autoimmune regulator (aire) protein plays a crucial role in promoting the expression of self-antigens in the thymus, which is essential for the elimination of self-reactive T cells during development.
Without the aire protein, self-reactive T cells that should have been eliminated can escape into the circulation and target the body's own cells and tissues, leading to autoimmune diseases.