Histochemistry and Cell Biology

, Volume 131, Issue 4, pp 455–458

Degradation of excess peroxisomes in mammalian liver cells by autophagy and other mechanisms


DOI: 10.1007/s00418-009-0564-6

Cite this article as:
Yokota, S. & Dariush Fahimi, H. Histochem Cell Biol (2009) 131: 455. doi:10.1007/s00418-009-0564-6


Here we discuss the mechanisms for the degradation of excess peroxisomes in mammalian hepatocytes which include (a) autophagy, (b) the action of peroxisomal Lon protease and (c) the membrane disrupting effect of 15-lipoxygenase. A recent study using Atg7 conditional-knock-out mice revealed that 70–80% of excess peroxisomes are degraded by the autophagic process. The remaining 20–30% of excess peroxisomes is most probably degraded by the action of peroxisomal Lon protease. Finally, a selective disruption of the peroxisomal membrane has been shown to be mediated by 15-lipoxygenase activity which is followed by diffusion of matrix proteins into the cytoplasm and cytoplasmic proteolysis.


PeroxisomeAutophagyPexophagyPeroxisomal Lon Protease15-LipoxygenaseAtg7-knockout mouse





Peroxisomal Lon Protease

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  1. 1.Section of Functional Morphology, Faculty of Pharmaceutical SciencesNagasaki International UniversitySasebo, NagasakiJapan
  2. 2.Division of Medical Cell Biology, Department of Anatomy and Cell BiologyUniversity of HeidelbergHeidelbergGermany