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Background

Schizophrenia is a common mental illness whose pathogenesis is still unknown. The vulnerability and stress model in schizophrenia assume that susceptibility to the disease is mainly associated with genes. Of the five symptomatic dimensions of schizophrenia, cognitive impairment appears to be most associated with the pathogenesis of schizophrenia. The aim of the study was to explore whether selected nucleotide variants in GRIN1, GRIN2A, and GRIN2B encoding subunits of the N-methyl-D-aspartate receptor (NMDA-R) receptor occur in a selected group of patients with treatment resistant schizophrenia with cognitive impairment.

Methods

The study included 45 patients diagnosed with super refractory schizophrenia, all with cognitive deficits and chronically psychotic. DNA fragments including the studied polymorphisms of the NMDA receptors subunit genes were amplified by polymerase chain reaction and subjected to sequencing.

Results

The study did not confirm the presence of any of the four selected single-nucleotide variants in GRIN1, GRIN2A, and GRIN2B subunits of NMDA-R in the study group.

Conclusion

Results of the study indicated that the selected single-nucleotide variants are not associated both with resistance to clozapine and the presence of cognitive deficits in schizophrenia. It is possible, however, that a more extensive sequencing along with analyzing the expression of these genes may reveal different single-nucleotide variants than those assumed in the study."xsd:string
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http://purl.uniprot.org/citations/33025395http://purl.uniprot.org/core/author"Witecka J."xsd:string
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http://purl.uniprot.org/citations/33025395http://purl.uniprot.org/core/author"Krzystanek M."xsd:string
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http://purl.uniprot.org/citations/33025395http://purl.uniprot.org/core/title"Selected single-nucleotide variants in GRIN1, GRIN2A, and GRIN2B encoding subunits of the NMDA receptor are not biomarkers of schizophrenia resistant to clozapine: exploratory study."xsd:string
http://purl.uniprot.org/citations/33025395http://purl.uniprot.org/core/volume"73"xsd:string
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