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Study of the pathophysiological mechanisms of psychiatric disorders in Fabry's disease

Grant number: 18/23367-0
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): May 01, 2019
Effective date (End): April 30, 2023
Field of knowledge:Biological Sciences - Biochemistry - Molecular Biology
Principal researcher:João Bosco Pesquero
Grantee:Patrícia Varela Calais
Home Institution: Escola Paulista de Medicina (EPM). Universidade Federal de São Paulo (UNIFESP). Campus São Paulo. São Paulo , SP, Brazil
Associated research grant:20/14635-1 - Modeling of monogenic diseases for physiopathological studies and pharmacological tests using specialized cells derived from iPSCs, AP.TEM


Fabry disease (FD) is an inborn error of the metabolism caused by mutations in the GLA gene (GLA; OMIM * 300644), located on the X chromosome. Defects in GLA lead to ±-galactosidase A deficiency (alpha-Gal A; .1.22), responsible for degrading glycosphingolipids, mainly globotriaosylceramide (Gb3). The ± -Gal A is present in all tissues; the deficiency of this enzyme results in a progressive multisystemic disease. FD encompasses a broad clinical phenotype spectrum, mainly affecting cardiac, renal, gastrointestinal and cerebrovascular systems. Neuropsychiatric symptoms are repeatedly described in patients with FD; however, the pathophysiological bases of FD in the central nervous system are poorly understood and it is unclear whether psychiatric symptoms are caused by the disease or secondary. We propose here to develop an in vitro model to study the pathophysiology of FD in neurons. First, we will use the CRISPR Cas9 technique to edit SH-SY5Y cells, a lineage capable of differentiating into neurons. These cells will be characterized by the efficiency of the mutations induction in the GLA gene and absence of off-targets, as well as for the deficiency of the enzymatic activity of the ±-Gal A. Then, the cells will be differentiated in neurons; the Gb3 accumulation as well as the cellular survival will be evaluated. Finally, we will perform the transcriptome of the edited and wild type cells, in order to analyze the possible impact of ±-Gal A deficiency on neurotransmitters, receptors, as well as on the expression of mRNAs related to proteins that are altered in psychiatric disorders.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
VARELA, PATRICIA; MASTROIANNI KIRSZTAJN, GIANNA; MOTTA, FABIANA L.; MARTIN, RENAN P.; TURACA, LAURO T.; FERRER, HENRIQUE L. F.; GOMES, CAIO P.; NICOLICHT, PRISCILA; MARA MARINS, MARYANA; PESSOA, JULIANA G.; BRAGA, MARION C.; D'ALMEIDA, VANIA; MARTINS, ANA MARIA; PESQUERO, JOAO B. Correlation between GLA variants and alpha-Galactosidase A profile in dried blood spot: an observational study in Brazilian patients. ORPHANET JOURNAL OF RARE DISEASES, v. 15, n. 1 JAN 29 2020. Web of Science Citations: 0.

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