Figure 2. Model of maintenance of memory B cells by mitochondrial autophagy.
Maintenance of mitochondrial homeostasis by autophagy contributes to the long-term persistence of memory B cells. Mitochondrial autophagy possibly serves as a regulator of mitochondrial homeostasis by removing superfluous or dysfunctional mitochondria to prevent the release of cell death molecules, mitochondrial DNA, and to maintain a quiescent metabolic state of glucose and lipid metabolism. In autophagy-deficient memory B cells, accumulation of mitochondria could lead to increased release of cell death molecules and the imbalance of quiescent metabolic program.