Changes in plasma D-serine, L-serine, and glycine levels in treatment-resistant schizophrenia before and after clozapine treatment

H Yamamori, R Hashimoto, Y Fujita, S Numata… - Neuroscience …, 2014 - Elsevier
Hypofunction of the N-methyl-d-aspartate (NMDA) subtype of glutamate receptors may be
involved in the pathophysiology of schizophrenia. Many studies have investigated …

Decreased free d-aspartate levels are linked to enhanced d-aspartate oxidase activity in the dorsolateral prefrontal cortex of schizophrenia patients

T Nuzzo, S Sacchi, F Errico, S Keller, O Palumbo… - npj …, 2017 - nature.com
It is long acknowledged that the N-methyl d-aspartate receptor co-agonist, d-serine, plays a
crucial role in several N-methyl d-aspartate receptor-mediated physiological and …

Decreased levels of D-aspartate and NMDA in the prefrontal cortex and striatum of patients with schizophrenia

F Errico, F Napolitano, M Squillace, D Vitucci… - Journal of psychiatric …, 2013 - Elsevier
The potential implication of a decrease in the function of N-methyl-d-aspartate receptors
(NMDARs) in the pathophysiology of schizophrenia has long been hypothesised …

Identification of multiple serine racemase (SRR) mRNA isoforms and genetic analyses of SRR and DAO in schizophrenia and D-serine levels

K Yamada, T Ohnishi, K Hashimoto, H Ohba… - Biological …, 2005 - Elsevier
BACKGROUND: We previously reported a reduction in serum levels of d-serine, an
endogenous co-agonist of the N-methyl-D-aspartate (NMDA) receptor, in schizophrenia …

Changes in plasma glycine, L-serine, and D-serine levels in patients with schizophrenia as their clinical symptoms improve: results from the Juntendo University …

T Ohnuma, Y Sakai, H Maeshima, T Hatano… - Progress in Neuro …, 2008 - Elsevier
OBJECTIVES: Based on the hypothesis of NMDA receptor hypofunction in schizophrenia,
plasma glycine, l-serine, and d-serine levels have been studied, since they could serve as …

D-serine efficacy as add-on pharmacotherapy to risperidone and olanzapine for treatment-refractory schizophrenia

U Heresco-Levy, DC Javitt, R Ebstein, A Vass… - Biological …, 2005 - Elsevier
BACKGROUND: D-serine, a selective full agonist at the glycine site of N-methyl-d-aspartate
glutamate receptor, might presently be the compound of choice for counteracting the …

d-Serine Added to Clozapine for the Treatment of Schizophrenia

GE Tsai, P Yang, LC Chung, IC Tsai… - American Journal of …, 1999 - Am Psychiatric Assoc
OBJECTIVE: d-Serine is a full agonist at the glycine site on the N-methyl-d-aspartate
(NMDA) receptor. Previous administration of d-serine to schizophrenic patients taking …

Free D-serine in post-mortem brains and spinal cords of individuals with and without neuropsychiatric diseases

S Kumashiro, A Hashimoto, T Nishikawa - Brain research, 1995 - Elsevier
We have measured the concentrations of free d-serine post-mortem in the prefrontal cortex,
parietal cortex, cerebellum and spinal cord from individuals with and without (controls) …

Immunocytochemical analysis of D‐serine distribution in the mammalian brain reveals novel anatomical compartmentalizations in glia and neurons

SM Williams, CM Diaz, LT Macnab, RKP Sullivan… - Glia, 2006 - Wiley Online Library
Abstract d‐Serine is a co‐agonist at the NMDA receptor glycine‐binding site. Early studies
have emphasized a glial localization for d‐serine. However the nature of the glial cells has …

d-serine levels in Alzheimer's disease: implications for novel biomarker development

C Madeira, MV Lourenco, C Vargas-Lopes… - Translational …, 2015 - nature.com
Alzheimer's disease (AD) is a severe neurodegenerative disorder still in search of effective
methods of diagnosis. Altered levels of the NMDA receptor co-agonist, d-serine, have been …