Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to familial isolated pituitary adenoma ?
    ### Response:
    FIPA can be caused by mutations in the AIP gene. The function of the protein produced from this gene is not well understood, but it is thought to act as a tumor suppressor, which means it helps prevent cells from growing and dividing in an uncontrolled way.
    