Journal
METABOLIC BRAIN DISEASE
Volume 37, Issue 1, Pages 123-146Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11011-021-00824-2
Keywords
Toxoplasma gondii; Neurotransmitter; Psychiatric disorders; Cytokine
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Toxoplasma gondii infection may lead to the development of neuropsychiatric disorders, causing changes in host behavior. These changes are associated with immune responses, parasite manipulation, CNS inflammation, and alterations in hormonal and neuromodulator relationships.
The most common form of the disease caused by Toxoplasma gondii (T. gondii) is latent toxoplasmosis due to the formation of tissue cysts in various organs, such as the brain. Latent toxoplasmosis is probably a risk factor in the development of some neuropsychiatric disorders. Behavioral changes after infection are caused by the host immune response, manipulation by the parasite, central nervous system (CNS) inflammation, as well as changes in hormonal and neuromodulator relationships. The present review focused on the exact mechanisms of T. gondii effect on the alteration of behavior and neurotransmitter levels, their catabolites and metabolites, as well as the interaction between immune responses and this parasite in the etiopathogenesis of psychiatric disorders. The dysfunction of neurotransmitters in the neural transmission is associated with several neuropsychiatric disorders. However, further intensive studies are required to determine the effect of this parasite on altering the level of neurotransmitters and the role of neurotransmitters in the etiology of host behavioral changes.
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