Studies of the Association of Genetic Polymorphism C677T in the Methylenetetrahydrofolate Reductase Gene with Symptom Severity in Schizophrenia Patients

Objective. To study the association of the C677T polymorphism of the MTHFR gene with the risk of developing schizophrenia in a large cohort including patients with schizophrenia and mentally healthy people and to investigate the association of this polymorphism with the severity of schizophrenia symptoms and the simultaneous effects of genetic variants and environmental factors on these symptoms. Materials and methods. The genotyping cohort consisted of 1357 schizophrenia patients and 711 controls. Symptom severity was evaluated on the PANSS. Environmental factors were birth complications and history of traumatic brain injury. Results and conclusions. No association was found between the C677T polymorphism of the MTHFR gene and schizophrenia. There was no genotype effect on symptom severity on PANSS subscales. The interaction between the polymorphism of interest and environmental factors had no effect on the severity of schizophrenia symptoms. These results do not support data from a number of investigations of an association between the C677T polymorphism of the MTHF gene and schizophrenia

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Correspondence to G. I. Korovaitseva.

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Translated from Zhurnal Nevrologii i Psikhiatrii imeni S. S. Korsakova, Vol. 120, No. 3, Iss. 1, pp. 48–52, March, 2020.

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Korovaitseva, G.I., Gabaeva, M.V. & Golimbet, V.E. Studies of the Association of Genetic Polymorphism C677T in the Methylenetetrahydrofolate Reductase Gene with Symptom Severity in Schizophrenia Patients. Neurosci Behav Physi 51, 7–11 (2021).

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  • MTHFR gene
  • C677T polymorphism
  • genotype-environmental interactions
  • schizophrenia
  • symptoms