<prompt> Answer this question truthfullyWhat is the mechanism by which Azathioprine and 6MP work in the treatment of inflammatory diseases, and which type of inflammatory diseases are they particularly effective against?  <response>: <reason> Azathioprine and 6MP work by inhibiting the proliferation of lymphocytes, which are a type of immune cell that plays a key role in many inflammatory diseases. Because lymphocytes proliferate rapidly, these drugs can be especially effective in treating lymphocyte-mediated inflammatory diseases such as rheumatoid arthritis, inflammatory bowel disease, and autoimmune hepatitis. 