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Quinolinic acid toxicity on oligodendroglial cells: relevance for multiple sclerosis and therapeutic strategies.

Abstract：

:The excitotoxin quinolinic acid, a by-product of the kynurenine pathway, is known to be involved in several neurological diseases including multiple sclerosis (MS). Quinolinic acid levels are elevated in experimental autoimmune encephalomyelitis rodents, the widely used animal model of MS. Our group has also found pathophysiological concentrations of quinolinic acid in MS patients. This led us to investigate the effect of quinolinic acid on oligodendrocytes; the main cell type targeted by the autoimmune response in MS. We have examined the kynurenine pathway (KP) profile of two oligodendrocyte cell lines and show that these cells have a limited threshold to catabolize exogenous quinolinic acid. We further propose and demonstrate two strategies to limit quinolinic acid gliotoxicity: 1) by neutralizing quinolinic acid's effects with anti-quinolinic acid monoclonal antibodies and 2) directly inhibiting quinolinic acid production from activated monocytic cells using specific KP enzyme inhibitors. The outcome of this study provides a new insight into therapeutic strategies for limiting quinolinic acid-induced neurodegeneration, especially in neurological disorders that target oligodendrocytes, such as MS.

journal_name

J Neuroinflammation

journal_title

Journal of neuroinflammation

authors

Sundaram G,Brew BJ,Jones SP,Adams S,Lim CK,Guillemin GJ

doi

10.1186/s12974-014-0204-5

subject

Has Abstract

pub_date

2014-12-13 00:00:00

pages

204

issn

1742-2094

pii

s12974-014-0204-5

journal_volume

11

pub_type

杂志文章

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