Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Galactosialidosis ?
    ### Response:
    What causes galactosialidosis? Galactosialidosis is caused by mutations in the CTSA gene. The CTSA gene provides instructions for making a protein called cathepsin A, which is active in cellular compartments called lysosomes. These compartments contain enzymes that digest and recycle materials when they are no longer needed.
    