Sex differences in brain gene expression among suicide completers


Por: Cabrera-Mendoza, Brenda, Fresno, Cristobal, Monroy-Jaramillo, Nancy, Fries, Gabriel Rodrigo, Walss-Bass, Consuelo, Glahn, David C., Ostrosky-Wegman, Patricia, Mendoza-Morales R.C., Garcia-Dolores, Fernando, Díaz-Otañez C.E., González-Sáenz E.E., Genis-Mendoza A.D., Martínez-Magaña J.J., Romero-Pimentel A.L., Flores, Gonzalo, Vázquez-Roque R.A., Nicolini, Humberto

Publicada: 1 ene 2020
Resumen:
Background: Suicide rates vary substantially by sex. Suicides committed by males significantly outnumber female suicides. Disparities in community and social factors provide a partial explanation for this phenomenon. Thus, the evaluation of sex differences at a biological level might contribute to the elucidation of the factors involved in this imbalance. The aim of the present study was to evaluate sex-specific gene expression patterns in the suicidal brain. Methods: postmortem samples from the dorsolateral prefrontal cortex (DLPFC) of 75 Latino individuals were analyzed. We considered the following groups: i) male suicides (n = 38), ii) female suicides (n = 10), iii) male controls (n = 20), and iv) female controls (n = 7). Gene expression profiles were evaluated by microarrays. Differentially expressed genes among the groups were identified with a linear model. Similarities and differences in the gene sets between the sexes were identified. Results: Differentially expressed genes were identified between suicides and controls of each sex: 1,729 genes in females and 1,997 genes in males. Female-exclusive suicide genes were related to cell proliferation and immune response. Meanwhile, male-exclusive suicide genes were associated to DNA binding and ribonucleic protein complex. Sex-independent suicide genes showed enrichment in mitochondrial and vesicular functions. Limitations: Relatively small sample size. Our diagnosis approach was limited to information found on coroner's records. The analysis was limited to a single brain area (DLPFC) and we used microarrays. Conclusion: Previously unexplored sex differences in the brain gene expression of suicide completers were identified, providing valuable foundation for the evaluation of sex-specific factors in suicide. © 2020 Elsevier B.V.

Filiaciones:
Cabrera-Mendoza, Brenda:
 Genomics of Psychiatric and Neurodegenerative Diseases Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City, Mexico

 PECEM, Faculty of Medicine, National Autonomous University of Mexico, Mexico City, Mexico

 Natl Inst Genom Med INMEGEN, Genom Psychiat & Neurodegenerat Dis Lab, Periferico Sur 4809, Mexico City 14610, DF, Mexico

 Univ Nacl Autonoma Mexico, Fac Med, PECEM, Mexico City, DF, Mexico

Fresno, Cristobal:
 Technological Development Department, National Institute of Genomic Medicine (INMEGEN), Mexico City, Mexico

 Natl Inst Genom Med INMEGEN, Technol Dev Dept, Mexico City, DF, Mexico

Monroy-Jaramillo, Nancy:
 Department of Genetics, National Institute of Neurology and Neurosurgery, Mexico City, Mexico

 Natl Inst Neurol & Neurosurg, Dept Genet, Mexico City, DF, Mexico

Fries, Gabriel Rodrigo:
 Department of Psychiatry and Behavioral Sciences, University of Texas Health Science Center at HoustonTX, United States

 Univ Texas Hlth Sci Ctr Houston, Dept Psychiat & Behav Sci, Houston, TX 77030 USA

Walss-Bass, Consuelo:
 Department of Psychiatry and Behavioral Sciences, University of Texas Health Science Center at HoustonTX, United States

 Univ Texas Hlth Sci Ctr Houston, Dept Psychiat & Behav Sci, Houston, TX 77030 USA

Glahn, David C.:
 Tommy Fuss Center for Neuropsychiatric Disease Research, Boston Children's Hospital, Boston, MA, United States

 Harvard Medical School, Boston, MA, United States

 Boston Childrens Hosp, Tommy Fuss Ctr Neuropsychiat Dis Res, Boston, MA USA

 Harvard Med Sch, Boston, MA 02115 USA

Ostrosky-Wegman, Patricia:
 Biomedical Research Institute, National Autonomous University of Mexico, Mexico City, Mexico

 Univ Nacl Autonoma Mexico, Biomed Res Inst, Mexico City, DF, Mexico

Mendoza-Morales R.C.:
 Institute of Forensic Sciences (INCIFO), Mexico City, Mexico

Garcia-Dolores, Fernando:
 Institute of Forensic Sciences (INCIFO), Mexico City, Mexico

 Inst Forens Sci INCIFO, Mexico City, DF, Mexico

Díaz-Otañez C.E.:
 Institute of Forensic Sciences (INCIFO), Mexico City, Mexico

González-Sáenz E.E.:
 Psychiatric Hospital Fray Bernardino Alvarez, Mexico City, Mexico

Genis-Mendoza A.D.:
 Genomics of Psychiatric and Neurodegenerative Diseases Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City, Mexico

Martínez-Magaña J.J.:
 Genomics of Psychiatric and Neurodegenerative Diseases Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City, Mexico

Romero-Pimentel A.L.:
 Genomics of Psychiatric and Neurodegenerative Diseases Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City, Mexico

Flores, Gonzalo:
 Neuropsychiatry Laboratory, Institute of Physiology, Meritorious Autonomous University of Puebla, Mexico City, Mexico

 Meritorious Autonomous Univ Puebla, Inst Physiol, Neuropsychiat Lab, Mexico City, DF, Mexico

Vázquez-Roque R.A.:
 Neuropsychiatry Laboratory, Institute of Physiology, Meritorious Autonomous University of Puebla, Mexico City, Mexico

Nicolini, Humberto:
 Genomics of Psychiatric and Neurodegenerative Diseases Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City, Mexico

 Natl Inst Genom Med INMEGEN, Genom Psychiat & Neurodegenerat Dis Lab, Periferico Sur 4809, Mexico City 14610, DF, Mexico

Psychiat Hosp Fray Bernardino Alvarez, Mexico City, DF, Mexico
ISSN: 01650327
Editorial
Elsevier, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, Países Bajos
Tipo de documento: Article
Volumen: 267 Número:
Páginas: 67-77
WOS Id: 000519542100010
ID de PubMed: 32063575

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