The damage to your kidneys should not be permanent, as you were on the Apriso for only 8 months. I have met 2 others who have the same kidney disease from the mesalamines and they got better. I am not in remission yet, but my BUN and creatinine are good as long as I stay hydrated, I was also on the mesalamines for 7 years before I found out that was the problem for my kidneys.
Let us know what they come back with from the biopsy.