INVESTIGATION OF FASCICULATION AND ELONGATION PROTEIN ζ-1 (FEZ1) IN PERIPHERAL BLOOD REVEALS DIFFERENCES IN GENE EXPRESSION IN PATIENTS WITH SCHIZOPHRENIA
Vachev TI1, Stoyanova VK, Ivanov HY, Minkov IN, Popov NT
*Corresponding Author: Associate Professor Vili K. Stoyanova, M.D., Ph.D., Department of Pediatrics and Medical Genetics, Medical University ‒ Plovdiv, 15A Vasil Aprilov St., 4000 Plovdiv, Bulgaria. Tel: +359-32- 602-431; Fax: +359-32-602-593. E-mail: vi1sto@abv.bg
page: 31
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Abstract

Schizophrenia (SZ) is a chronic neuropsychiatric disorder characterized by affective, neuromorphological and cognitive impairment, deteriorated social functioning and psychosis with underlying molecular abnormalities, including gene expression changes. Observations have suggested that fasciculation and elongation protein ζ-1 (FEZ1) may be implicated in the pathogenesis of schizophrenia. Nevertheless, our current knowledge of the expression of FEZ1 in peripheral blood of schizophrenia patients remains unclear. The purpose of this study was to identify the characteristic gene expression patterns of FEZ1 in peripheral blood samples from schizophrenia patients. We performed quantitative reverse-transcriptase (qRT-PCR) analysis using peripheral blood from drug-free schizophrenia patients (n = 29) and age and gender-matched general population controls (n = 24). For the identification of FEZ1 gene expression patterns, we applied a comparative threshold cycle (CT) method. A statistically significant difference of FEZ1 mRNA level was revealed in schizophrenia subjects compared to healthy controls (p = 0.0034). To the best of our knowledge, this study is the first describing a down-regulation of FEZ1 gene expression in peripheral blood of patients with schizophrenia. Our results suggested a possible functional role of FEZ1 in the pathogenesis of schizophrenia and confirmed the utility of peripheral blood samples for molecular profiling of psychiatric disorders including schizophrenia. The current study describes FEZ1 gene expression changes in peripheral blood of patients with schizophrenia with significantly down-regulation of FEZ1 mRNA. Thus, our results provide support for a model of SZ pathogenesis that includes the effects of FEZ1 expression.



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