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Viruses 2017, 9(7), 176; doi:10.3390/v9070176

Interplay between Autophagy, Exosomes and HIV-1 Associated Neurological Disorders: New Insights for Diagnosis and Therapeutic Applications

1
Department of Immunology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA
2
Laboratory of Molecular Virology, School of Systems Biology, George Mason University, Manassas, VA 20110, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Christian Münz
Received: 28 April 2017 / Revised: 16 June 2017 / Accepted: 28 June 2017 / Published: 6 July 2017
(This article belongs to the Special Issue Viruses and Autophagy)
View Full-Text   |   Download PDF [583 KB, uploaded 6 July 2017]   |  

Abstract

The autophagy–lysosomal pathway mediates a degradative process critical in the maintenance of cellular homeostasis as well as the preservation of proper organelle function by selective removal of damaged proteins and organelles. In some situations, cells remove unwanted or damaged proteins and RNAs through the release to the extracellular environment of exosomes. Since exosomes can be transferred from one cell to another, secretion of unwanted material to the extracellular environment in exosomes may have an impact, which can be beneficial or detrimental, in neighboring cells. Exosome secretion is under the influence of the autophagic system, and stimulation of autophagy can inhibit exosomal release and vice versa. Neurons are particularly vulnerable to degeneration, especially as the brain ages, and studies indicate that imbalances in genes regulating autophagy are a common feature of many neurodegenerative diseases. Cognitive and motor disease associated with severe dementia and neuronal damage is well-documented in the brains of HIV-infected individuals. Neurodegeneration seen in the brain in HIV-1 infection is associated with dysregulation of neuronal autophagy. In this paradigm, we herein provide an overview on the role of autophagy in HIV-associated neurodegenerative disease, focusing particularly on the effect of autophagy modulation on exosomal release of HIV particles and how this interplay impacts HIV infection in the brain. Specific autophagy–regulating agents are being considered for therapeutic treatment and prevention of a broad range of human diseases. Various therapeutic strategies for modulating specific stages of autophagy and the current state of drug development for this purpose are also evaluated. View Full-Text
Keywords: autophagy; exosomes; HIV; neurodegenerative disorders; therapeutic interventions autophagy; exosomes; HIV; neurodegenerative disorders; therapeutic interventions
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Ojha, C.R.; Lapierre, J.; Rodriguez, M.; Dever, S.M.; Zadeh, M.A.; DeMarino, C.; Pleet, M.L.; Kashanchi, F.; El-Hage, N. Interplay between Autophagy, Exosomes and HIV-1 Associated Neurological Disorders: New Insights for Diagnosis and Therapeutic Applications. Viruses 2017, 9, 176.

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