Genetic bases of Syndromic Obesity and molecular mechanisms involved in its physiopathology

• Grant number: 18/08486-3
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: March 01, 2019
• End date: December 31, 2022
• Field of knowledge: Biological Sciences - Genetics - Human and Medical Genetics
• Principal Investigator: Carla Rosenberg
• Grantee: Laura Machado Lara Carvalho
• Host Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 13/08028-1 - CEGH-CEL - Human Genome and Stem Cell Research Center, AP.CEPID

Abstract

Syndromic Obesity is a rare pathology of great phenotypic variability, which is defined by the association of obesity with one or more of the following characteristics: neuropsychomotor developmental delay, dysmorphic features and/or congenital malformations. Unfortunately, most cases of Syndromic Obesity do not have their genetic origin elucidated. Objectives: Identify candidate genetic variants and elucidate the involved pathophysiological mechanisms. Methods: We will perform exome sequencing by NGS (Next Generation Sequencing) of 30 patients and their parents, previously excluded cases of genomic unbalance or chromosomal alterations (detected by CGH-array). For functional validation, zebrafish will be submitted to genetic editing by the CRISPR technique, in order to present the genetic variants identified as candidates in the patient's exome analysis. Subsequently, these animals will be compared to wild type animals by transcriptomic (RNAseq) and morphological analysis (histology and body measurements). Finally, we intend to infer the pathological mechanisms triggered by the variants studied considering the comparative analyzes between animals carrying the variants and controls. Future perspectives: The identification of candidate genes and pathophysiological mechanisms will improve our knowledge of the mechanisms involved in Syndromic Obesity, and will reflect in more preciseclinical diagnosis and genetic counseling of the patients. In addition, the understanding of pathophysiology may be the basis for new studies involving therapeutic proposals, which could improve the quality of life of patients with this pathology or some of those symptoms. (AU)

Scientific publications

(5)

(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)

LARA CARVALHO, LAURA MACHADO; D'ANGELO, CARLA SUSTEK; VILLELA, DARINE; DA COSTA, SILVIA SOUZA; DE LIMA JORGE, ALEXANDER AUGUSTO; DA SILVA, ISRAEL TOJAL; SCLIAR, MARILIA DE OLIVEIRA; CHAVES, LUIZA DIAS; VICTORINO KREPISCHI, ANA CRISTINA; KOIFFMANN, CELIA PRISZKULNIK; et al. Genetic investigation of syndromic forms of obesity. International Journal of Obesity, v. N/A, p. 5-pg., 2022-05-21. (13/08028-1, 18/08486-3, 12/50981-5)

CARVALHO, LAURA M. L.; D'ANGELO, CARLA S.; MUSTACCHI, ZAN; DA SILVA, ISRAEL T.; KREPISCHI, ANA CRISTINA V.; KOIFFMANN, CELIA P.; ROSENBERG, CARLA. A novel MYT1L mutation in a boy with syndromic obesity: Case report and literature review. OBESITY RESEARCH & CLINICAL PRACTICE, v. 15, n. 2, p. 124-132, MAR-APR 2021. (13/08028-1, 18/08486-3)

CARVALHO, LAURA MACHADO LARA; BRANCO, ELISA VARELLA; SARAFIAN, RAQUEL DELGADO; KOBAYASHI, GERSON SHIGERU; DE ARAUJO, FABIANO TOFOLI; SOUZA, LUCAS SANTOS; MOREIRA, DANIELLE DE PAULA; HSIA, GABRIELLA SHIH PING; BERTOLLO, ENY MARIA GOLONI; BUCK, CECILIA BARBOSA; et al. Establishment of iPSC lines and zebrafish with loss-of-function AHDC1 variants: Models for Xia-Gibbs syndrome. Gene, v. 871, p. 10-pg., 2023-04-22. (20/03108-0, 20/04744-8, 13/08028-1, 20/10168-0, 18/08486-3, 19/02605-3)

CARVALHO, L. M. L.; DA COSTA, S. S.; CAMPAGNARI, F.; KAUFMAN, A.; BERTOLA, D. R.; DA SILVA, I. T.; KREPISCHI, V, A. C.; KOIFFMANN, C. P.; ROSENBERG, C.. Two novel pathogenic variants in MED13L: one familial and one isolated case. JOURNAL OF INTELLECTUAL DISABILITY RESEARCH, v. 65, n. 12, OCT 2021. (18/08486-3, 13/08028-1, 12/50981-5)

LARA CARVALHO, LAURA MACHADO; PINTO, CARLA FRANCHI; SCLIAR, MARILIA DE OLIVEIRA; OTTO, PAULO A.; VICTORINO KREPISCHI, ANA CRISTINA; ROSENBERG, CARLA. SCAF4-related syndromic intellectual disability. AMERICAN JOURNAL OF MEDICAL GENETICS PART A, v. N/A, p. 5-pg., 2022-11-05. (13/08028-1, 18/08486-3)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

CARVALHO, Laura Machado Lara. Genetic investigation of syndromic obesity and development of biological models to study the Xia-Gibbs syndrome. 2023. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Biociências (IBIOC/SB) São Paulo.