Deficit, but Not Nondeficit, Schizophrenia Is Characterized by Mucosa-Associated Activation of the Tryptophan Catabolite (TRYCAT) Pathway with Highly Specific Increases in IgA Responses Directed to Picolinic, Xanthurenic, and Quinolinic Acid.
Identifieur interne : 000E65 ( Main/Exploration ); précédent : 000E64; suivant : 000E66Deficit, but Not Nondeficit, Schizophrenia Is Characterized by Mucosa-Associated Activation of the Tryptophan Catabolite (TRYCAT) Pathway with Highly Specific Increases in IgA Responses Directed to Picolinic, Xanthurenic, and Quinolinic Acid.
Auteurs : Buranee Kanchanatawan [Thaïlande] ; Sunee Sirivichayakul [Thaïlande] ; Kiat Ruxrungtham [Thaïlande] ; André F. Carvalho [Brésil] ; Michel Geffard [France] ; Heidi Ormstad [Norvège] ; George Anderson [Royaume-Uni] ; Michael Maes [Thaïlande]Source :
- Molecular neurobiology [ 1559-1182 ] ; 2017.
Abstract
Evidence suggests that activation of the tryptophan catabolite (TRYCAT) pathway is involved in the pathophysiology of schizophrenia. However, no previous study examined whether TRYCAT pathway activation is associated with deficit schizophrenia. We measured IgA responses to TRYCATs, namely quinolinic acid, picolinic acid, kynurenic acid, xanthurenic acid, and anthranilic acid and 3-OH-kynurenine, in 40 healthy controls and in schizophrenic patients with (n = 40) and without (n = 40) deficit, defined according to the Schedule for the Deficit Syndrome (SDS). Primary deficit schizophrenia is accompanied by an activated TRYCAT pathway as compared to controls and nondeficit schizophrenia. Participants with deficit schizophrenia show increased IgA responses to xanthurenic acid, picolinic acid, and quinolinic acid and relatively lowered IgA responses to kynurenic and anthranilic acids, as compared to patients with nondeficit schizophrenia. Both schizophrenia subgroups show increased IgA responses to 3-OH-kynurenine as compared to controls. The IgA responses to noxious TRYCATs, namely xanthurenic acid, picolinic acid, quinolinic acid, and 3-OH-kynurenine, but not protective TRYCATS, namely anthranilic acid and kunyrenic acid, are significantly higher in deficit schizophrenia than in controls. The negative symptoms of schizophrenia are significantly and positively associated with increased IgA responses directed against picolinic acid and inversely with anthranilic acid, whereas no significant associations between positive symptoms and IgA responses to TRYCATs were found. In conclusion, primary deficit schizophrenia is characterized by TRYCAT pathway activation and differs from nondeficit schizophrenia by a highly specific TRYCAT pattern suggesting increased excitotoxicity, cytotoxicity, and neurotoxicity, as well as inflammation and oxidative stress. The specific alterations in IgA responses to TRYCATs provide further insight for the biological delineation of deficit versus nondeficit schizophrenia.
DOI: 10.1007/s12035-017-0417-6
PubMed: 28181189
Affiliations:
- Brésil, France, Norvège, Royaume-Uni, Thaïlande
- Angleterre, Aquitaine, Aquitaine-Limousin-Poitou-Charentes, Ceará, Grand Londres
- Bordeaux, Londres, Talence
- Université fédérale du Ceará
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However, no previous study examined whether TRYCAT pathway activation is associated with deficit schizophrenia. We measured IgA responses to TRYCATs, namely quinolinic acid, picolinic acid, kynurenic acid, xanthurenic acid, and anthranilic acid and 3-OH-kynurenine, in 40 healthy controls and in schizophrenic patients with (n = 40) and without (n = 40) deficit, defined according to the Schedule for the Deficit Syndrome (SDS). Primary deficit schizophrenia is accompanied by an activated TRYCAT pathway as compared to controls and nondeficit schizophrenia. Participants with deficit schizophrenia show increased IgA responses to xanthurenic acid, picolinic acid, and quinolinic acid and relatively lowered IgA responses to kynurenic and anthranilic acids, as compared to patients with nondeficit schizophrenia. Both schizophrenia subgroups show increased IgA responses to 3-OH-kynurenine as compared to controls. The IgA responses to noxious TRYCATs, namely xanthurenic acid, picolinic acid, quinolinic acid, and 3-OH-kynurenine, but not protective TRYCATS, namely anthranilic acid and kunyrenic acid, are significantly higher in deficit schizophrenia than in controls. The negative symptoms of schizophrenia are significantly and positively associated with increased IgA responses directed against picolinic acid and inversely with anthranilic acid, whereas no significant associations between positive symptoms and IgA responses to TRYCATs were found. In conclusion, primary deficit schizophrenia is characterized by TRYCAT pathway activation and differs from nondeficit schizophrenia by a highly specific TRYCAT pattern suggesting increased excitotoxicity, cytotoxicity, and neurotoxicity, as well as inflammation and oxidative stress. The specific alterations in IgA responses to TRYCATs provide further insight for the biological delineation of deficit versus nondeficit schizophrenia.</div></front></TEI><affiliations><list><country><li>Brésil</li><li>France</li><li>Norvège</li><li>Royaume-Uni</li><li>Thaïlande</li></country><region><li>Angleterre</li><li>Aquitaine</li><li>Aquitaine-Limousin-Poitou-Charentes</li><li>Ceará</li><li>Grand Londres</li></region><settlement><li>Bordeaux</li><li>Londres</li><li>Talence</li></settlement><orgName><li>Université fédérale du Ceará</li></orgName></list><tree><country name="Thaïlande"><noRegion><name sortKey="Kanchanatawan, Buranee" sort="Kanchanatawan, Buranee" uniqKey="Kanchanatawan B" first="Buranee" last="Kanchanatawan">Buranee Kanchanatawan</name></noRegion><name sortKey="Maes, Michael" sort="Maes, Michael" uniqKey="Maes M" first="Michael" last="Maes">Michael Maes</name><name sortKey="Ruxrungtham, Kiat" sort="Ruxrungtham, Kiat" uniqKey="Ruxrungtham K" first="Kiat" last="Ruxrungtham">Kiat Ruxrungtham</name><name sortKey="Sirivichayakul, Sunee" sort="Sirivichayakul, Sunee" uniqKey="Sirivichayakul S" first="Sunee" last="Sirivichayakul">Sunee Sirivichayakul</name></country><country name="Brésil"><region name="Ceará"><name sortKey="Carvalho, Andre F" sort="Carvalho, Andre F" uniqKey="Carvalho A" first="André F" last="Carvalho">André F. Carvalho</name></region></country><country name="France"><region name="Aquitaine-Limousin-Poitou-Charentes"><name sortKey="Geffard, Michel" sort="Geffard, Michel" uniqKey="Geffard M" first="Michel" last="Geffard">Michel Geffard</name></region></country><country name="Norvège"><noRegion><name sortKey="Ormstad, Heidi" sort="Ormstad, Heidi" uniqKey="Ormstad H" first="Heidi" last="Ormstad">Heidi Ormstad</name></noRegion></country><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Anderson, George" sort="Anderson, George" uniqKey="Anderson G" first="George" last="Anderson">George Anderson</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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