Autophagy: healthy eating and self-digestion for gastroenterologists.

Autophagy is an evolutionary conserved mechanism in eukaryotic cells that is known to process redundant or defective cellular proteins and organelles. The recent renewal of interest in autophagy research has led to a significant expansion in our understanding of the importance of autophagy in cellular health and disease. This invited review summarizes key elements of autophagy research, emphasizes those of particular interest to gastroenterologists, and offers insights into present and future research directions.