ATG4B and diabetic kidney disease: Allele A promotes the formation of a relaxed form of the pre-miR-34a terminal loop, which facilitates its processing and leads to an increase in miR-34a expression in INS-1 and MIN6 cells.The effect of allograft inflammatory factor-1 on inflammation, oxidative stress, and autophagy via miR-34a/ATG4B pathway in diabetic kidney disease