Similar to solid cancers, depletion of HsClpP has beenshown to reduce the rate of growth and viability of multiplelines of leukemic cells that show elevated levels of expression ofthe protease.28 Notably, the loss of HsClpP leads to decreasedOXPHOS and increased ROS production resulting from astructurally and functionally compromised Complex II.28 Aninteresting finding is that, while the level of UPRmt is elevatedconsistently across leukemic cell lines with a high level ofHsClpP expression, depleting the protease produces noobservable impact on either the expression of UPRmt markersor mitochondrial morphology.28 This is in contrast to thefindings in immortalized muscle cells18 and fibroblasts,14 whichreflects a variation in the potential role of HsClpP in UPRmtamong different types of cancer.