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Current Topics in Medicinal Chemistry

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ISSN (Print): 1568-0266
ISSN (Online): 1873-4294

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Mini-Review Article

The Complexity of Purinergic Signaling During Toxoplasma Infection

Author(s): Aline Cristina Abreu Moreira-Souza and Robson Coutinho-Silva*

Volume 21, Issue 3, 2021

Published on: 11 December, 2020

Page: [205 - 212] Pages: 8

DOI: 10.2174/1568026621999201211202533

Price: $65

Abstract

Toxoplasmosis is a neglected disease caused by infection by the protozoan Toxoplasma gondii. One-third of the global population is expected to be by infected T. gondii. In Europe and North America, most infections do not induce disease, except in the context of immunosuppression. However, in endemic regions such Central and South America, infections induce severe ocular and potentially lethal disease, even in immunocompetent individuals.

The immune response against T. gondii infection involves components of innate immunity even in the chronic phase of the disease, including dangerous signal molecules such as extracellular nucleotides.

Purinergic signaling pathways include ionotropic and metabotropic receptors activated by extracellular nucleotides that are divided into P2X, P2Y, and A1 receptor families. The activation of purinergic signaling impacts biological systems by modulating immune responses to intracellular pathogens such as T. gondii. Ten years ago, purinergic signaling in the T. gondii infection was reported for the first time. In this review, we update and summarize the main findings regarding the role of purinergic signaling in T. gondii infection; these include in vitro findings: the microbicidal effect of P2Y and P2X7 activation phagocytic cells and parasite control by P2X7 activation in non-phagocytic cells; and in vivo findings: the promotion of early pro-inflammatory events that protect the host in acute and chronic models.

Keywords: Toxoplasma gondii, P2X7 receptor, Purinergic receptors, IL-1β, Innate immunity, Chronic models.

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Graphical Abstract

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