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01-10-2019 | Alzheimer's Disease

Does HIV infection contribute to increased beta-amyloid synthesis and plaque formation leading to neurodegeneration and Alzheimer’s disease?

Authors: Tamas Fulop, Jacek M. Witkowski, Anis Larbi, Abdelouahed Khalil, Georges Herbein, Eric H. Frost

Published in: Journal of NeuroVirology | Issue 5/2019

Abstract

HIV infection in the combination antiretroviral therapy (cART) era has become a chronic disease with a life expectancy almost identical to those free from this infection. Concomitantly, chronic diseases such as neurodegenerative diseases have emerged as serious clinical problems. HIV-induced cognitive changes, although clinically very diverse are collectively called HIV-associated neurocognitive disorder (HAND). HAND, which until the introduction of cART manifested clinically as a subcortical disorder, is now considered primarily cognitive disorder, which makes it similar to diseases like Alzheimer’s (AD) and Parkinson’s disease (PD). The pathogenesis involves either the direct effects of the virus or the effect of viral proteins such as Tat, Ggp120, and Nef. These proteins are either capable of destroying neurons directly by inducing neurotoxic mediators or by initiating neuroinflammation by microglia and astrocytes. Recently, it has become recognized that HIV infection is associated with increased production of the beta-amyloid peptide (Aβ) which is a characteristic of AD. Moreover, amyloid plaques have also been demonstrated in the brains of patients suffering from HAND. Thus, the question arises whether this production of Aβ indicates that HAND may lead to AD or it is a form of AD or this increase in Aβ production is only a bystander effect. It has also been discovered that APP in HIV and its metabolic product Aβ in AD manifest antiviral innate immune peptide characteristics. This review attempts to bring together studies linking amyloid precursor protein (APP) and Aβ production in HIV infection and their possible impact on the course of HAND and AD. These data indicate that human defense mechanisms in HAND and AD are trying to contain microorganisms by antimicrobial peptides, however by employing different means. Future studies will, no doubt, uncover the relationship between HAND and AD and, hopefully, reveal novel treatment possibilities.

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Title: Does HIV infection contribute to increased beta-amyloid synthesis and plaque formation leading to neurodegeneration and Alzheimer’s disease?
Authors: Tamas Fulop
Jacek M. Witkowski
Anis Larbi
Abdelouahed Khalil
Georges Herbein
Eric H. Frost
Publication date: 01-10-2019
Publisher: Springer International Publishing
Keywords: Alzheimer's Disease
Human Immunodeficiency Virus
Alzheimer's Disease
Published in: Journal of NeuroVirology / Issue 5/2019
Print ISSN: 1355-0284
Electronic ISSN: 1538-2443
DOI: https://doi.org/10.1007/s13365-019-00732-3

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Springer Medicine

Does HIV infection contribute to increased beta-amyloid synthesis and plaque formation leading to neurodegeneration and Alzheimer’s disease?

Abstract

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

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