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Brain manganese and the balance between essential roles and neurotoxicity.


ABSTRACT: Manganese (Mn) is an essential micronutrient required for the normal development of many organs, including the brain. Although its roles as a cofactor in several enzymes and in maintaining optimal physiology are well-known, the overall biological functions of Mn are rather poorly understood. Alterations in body Mn status are associated with altered neuronal physiology and cognition in humans, and either overexposure or (more rarely) insufficiency can cause neurological dysfunction. The resultant balancing act can be viewed as a hormetic U-shaped relationship for biological Mn status and optimal brain health, with changes in the brain leading to physiological effects throughout the body and vice versa. This review discusses Mn homeostasis, biomarkers, molecular mechanisms of cellular transport, and neuropathological changes associated with disruptions of Mn homeostasis, especially in its excess, and identifies gaps in our understanding of the molecular and biochemical mechanisms underlying Mn homeostasis and neurotoxicity.

SUBMITTER: Balachandran RC 

PROVIDER: S-EPMC7212623 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature

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Brain manganese and the balance between essential roles and neurotoxicity.

Balachandran Rekha C RC   Mukhopadhyay Somshuvra S   McBride Danielle D   Veevers Jennifer J   Harrison Fiona E FE   Aschner Michael M   Haynes Erin N EN   Bowman Aaron B AB  

The Journal of biological chemistry 20200318 19


Manganese (Mn) is an essential micronutrient required for the normal development of many organs, including the brain. Although its roles as a cofactor in several enzymes and in maintaining optimal physiology are well-known, the overall biological functions of Mn are rather poorly understood. Alterations in body Mn status are associated with altered neuronal physiology and cognition in humans, and either overexposure or (more rarely) insufficiency can cause neurological dysfunction. The resultant  ...[more]

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