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Bertola, Debora R. ; Castro, Matheus A. A. ; Yamamoto, Guilherme L. ; Honjo, Rachel S. ; Ceroni, Jose Ricardo ; Buscarilli, Michele M. ; Freitas, Amanda B. ; Malaquias, Alexsandra C. ; Pereira, Alexandre C. ; Jorge, Alexander A. L. ; Passos-Bueno, Maria Rita ; Kim, Chong A.

• Tipo de documento: Artigo Científico
• Fonte: AMERICAN JOURNAL OF MEDICAL GENETICS PART C-SEMINARS IN MEDICAL GENETICS; v. 184, n. 4, p. 16-pg., 2020-10-31.

Resumo

We report the clinical and molecular data of a large cohort comprising 242 individuals with RASopathies, from a single Tertiary Center in Brazil, the largest study from Latin America. Noonan syndrome represented 76% of the subjects, with heterozygous variants in nine different genes, mainly PTPN11, SOS1, RAF1, LZTR1, and RIT1, detected by Sanger and next-generation sequencing. The latter was applied to 126 individuals, with a positive yield of 63% in genes of the RAS/MAPK cascade. We present evidence that there are some allelic differences in PTPN11 across distinct populations. We highlight the clinical aspects that pose more medical concerns, such as the cardiac anomalies, bleeding diathesis and proliferative lesions. The genotype-phenotype analysis between the RASopathies showed statistically significant differences in some cardinal features, such as craniofacial and cardiac anomalies, the latter also statistically significant for different genes in Noonan syndrome. We present two individuals with a Noonan syndrome phenotype, one with an atypical, structural cardiac defect, harboring variants in genes mainly associated with isolated hypertrophic cardiomyopathy and discuss the role of these variants in their phenotype. (AU)

• Processo FAPESP: 13/08028-1 - CEGH-CEL - Centro de Estudos do Genoma Humano e de Células-Tronco
• Beneficiário: Mayana Zatz
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 11/17299-3 - Estudo clínico e molecular de pacientes com síndromes de Noonan e Noonan-like: caracterização fenotípica e pesquisa de novas alterações causais
• Beneficiário: Débora Romeo Bertola
• Modalidade de apoio: Auxílio à Pesquisa - Regular