title: Chaperone-mediated autophagy: roles in neuroprotection.
abstract: Chaperone-mediated autophagy (CMA), one of the main pathways of lysosomal proteolysis, is characterized by the selective targeting and direct translocation into the lysosomal lumen of substrate proteins containing a targeting motif biochemically related to the pentapeptide KFERQ. Along with the other two lysosomal pathways, macro- and micro-autophagy, CMA is essential for maintaining cellular homeostasis and survival by selectively degrading misfolded, oxidized, or damaged cytosolic proteins. CMA plays an important role in pathologies such as cancer, kidney disorders, and neurodegenerative diseases. Neurons are post-mitotic and highly susceptible to dysfunction of cellular quality-control systems. Maintaining a balance between protein synthesis and degradation is critical for neuronal functions and homeostasis. Recent studies have revealed several new mechanisms by which CMA protects neurons through regulating factors critical for their viability and homeostasis. In the current review, we summarize recent advances in the understanding of the regulation and physiology of CMA with a specific focus on its possible roles in neuroprotection.
authors.affiliation: Department of Neurosurgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an, 710038, China.
authors.forename: Zhibiao
authors.initials: Z
authors.lastname: Cai
authors.forename: Weijun
authors.initials: W
authors.lastname: Zeng
authors.forename: Kai
authors.initials: K
authors.lastname: Tao
authors.forename: Zhen
authors.initials: Z
authors.lastname: E
authors.forename: Bao
authors.initials: B
authors.lastname: Wang
authors.forename: Qian
authors.initials: Q
authors.lastname: Yang
mesh_terms: D000544:Alzheimer Disease / Q000378:metabolism; D000818:Animals; D001343:Autophagy / Q000502:physiology*; D006801:Humans; D006816:Huntington Disease / Q000378:metabolism; D008247:Lysosomes / Q000378:metabolism / Q000502:physiology*; D018832:Molecular Chaperones / Q000378:metabolism / Q000502:physiology; D009474:Neurons / Q000378:metabolism / Q000502:physiology*; D010300:Parkinson Disease / Q000378:metabolism
chemical_list: D018832:Molecular Chaperones