Exploring the association between brain-derived neurotrophic factor (BDNF) levels and longitudinal psychopathological and cognitive changes in Sardinian psychotic patients

Ulker Isayeva, Mirko Manchia, Roberto Collu, Diego Primavera, Luca Deriu, Edoardo Caboni, Novella Iaselli, Davide Sundas, Massimo Tusconi, Federica Pinna, Pasquale Paribello, Maria Scherma, Claudia Pisanu, Anna Meloni, Clement C. Zai, Donatella Congiu, Alessio Squassina, Walter Fratta, Paola Fadda, Bernardo Carpiniello

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Resumen

Background and Hypothesis: Schizophrenia is among the most debilitating mental disorders and has complex pathophysiological underpinnings. There is growing evidence that brain-derived neurotrophic factor (BDNF) can play a role in its pathogenesis. The present study investigated the longitudinal variation of serum BDNF levels in a 24-month observational prospective cohort study of Sardinian psychotic patients and its relationship with psychopathological and cognitive changes. Further, we examined whether genetic variation within the BDNF gene could moderate these relationships. Study design: Every six months 105 patients were assessed for their BDNF serum levels, as well as for a series of psychopathological, cognitive, and social measures. We performed a targeted analysis of four tag single nucleotide polymorphisms (SNPs) within the BDNF gene that were selected and analyzed using Polymerase Chain Reaction (PCR). Longitudinal data were analyzed using mixed-effects linear regression models (MLRM). Study results: We observed a declining longitudinal trajectory of BDNF levels in psychotic patients in general, and in relation to the severity of depressive and negative symptoms. BDNF serum levels also declined in patients scoring lower in cognitive measures such as attention and speed of information processing and verbal fluency. The rs7934165 polymorphism moderated the significant association between verbal fluency and BDNF levels. Conclusions: These findings in patients from real-world settings suggest a plausible role of peripheral BDNF levels as a marker of illness burden in schizophrenia spectrum disorders.

Idioma originalEnglish
PublicaciónEuropean Psychiatry
DOI
EstadoAccepted/In press - 2022

Nota bibliográfica

Publisher Copyright:
© 2022 Elsevier Masson SAS. All rights reserved.

ASJC Scopus Subject Areas

  • Psychiatry and Mental health

PubMed: MeSH publication types

  • Journal Article

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