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Adiponectin, the adiponectin paradox, and Alzheimer’s Disease: Is this association biologically plausible?

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Abstract

Dementia, especially Alzheimer’s Disease (AD) and vascular dementia, is a major public health problem that continues to expand in both economically emerging and hegemonic countries. In 2017, the World Alzheimer Report estimated that over 50 million people were living with dementia globally. Metabolic dysfunctions of brain structures such as the hippocampus and cerebral cortex have been implicated as risk factors for dementia. Several well-defined metabolic risk factors for AD include visceral obesity, chronic inflammation, peripheral and brain insulin resistance, type 2 diabetes mellitus (T2DM), hypercholesterolemia, and others. In this review, we describe the relationship between the dysmetabolic mechanisms, although still unknown, and dementia, particularly AD. Adiponectin (ADPN), the most abundant circulating adipocytokine, acts as a protagonist in the metabolic dysfunction associated with AD, with unexpected and intriguing dual biological functions. This contradictory role of ADPN has been termed the adiponectin paradox. Some evidence suggests that the adiponectin paradox is important in amyloidogenic evolvability in AD. We present cumulative evidence showing that AD and T2DM share many common features. We also review the mechanistic pathways involving brain insulin resistance. We discuss the importance of the evolvability of amyloidogenic proteins (APs), defined as the capacity of a system for adaptive evolution. Finally, we describe potential therapeutic strategies in AD, based on the adiponectin paradox.

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Funding

This study was supported by the following Brazilian agencies: 1. Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES).

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Authors contributed equally to the manuscript. The illustrations were designed by Rômulo Sperduto Dezonne. We thank Miss Janet Reid for English review of the manuscript.

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Correspondence to Emilio Antonio Francischetti.

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The authors declare that they have no financial interests. The research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

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Dezonne, R.S., Pereira, C.M., de Moraes Martins, C.J. et al. Adiponectin, the adiponectin paradox, and Alzheimer’s Disease: Is this association biologically plausible?. Metab Brain Dis 38, 109–121 (2023). https://doi.org/10.1007/s11011-022-01064-8

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  • DOI: https://doi.org/10.1007/s11011-022-01064-8

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