Genotype-phenotype associations in a large PTEN Hamartoma Tumor Syndrome (PHTS) patient cohort

Background: Pathogenic PTEN germline variants cause PTEN Hamartoma Tumor Syndrome (PHTS), a rare disease with a variable genotype and phenotype. Knowledge about these spectra and genotype-phenotype associations could help diagnostics and potentially lead to personalized care. Therefore, we assessed...

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Detalhes bibliográficos
Autores: Hendricks LAJ, Hoogerbrugge N, Venselaar H, Aretz S, Spier I, Legius E, Brems H, de Putter R, Claes KBM, Evans DG, Woodward ER, Genuardi M, Brugnoletti F, van Ierland Y, Dijke K, Tham E, Tesi B, Schuurs-Hoeijmakers JHM, Branchaud M, Salvador H, Jahn A, Schnaiter S, Anastasiadou VC, Brunet J, Oliveira C, Roht L, Blatnik A, Irmejs A, Mensenkamp AR, Vos JR
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2022
País:España
Recursos:Fundació Sant Joan de Déu
Repositório:r-FSJD. Repositorio Institucional de Producción Científica de la Fundació Sant Joan de Déu
OAI Identifier:oai:fsjd.fundanetsuite.com:p22576
Acesso em linha:https://fsjd.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=22576
Access Level:Acceso aberto
Palavra-chave:Genetic variation
Genetic association studies
Human genetics
Medical oncology
Phenotype
Descrição
Resumo:Background: Pathogenic PTEN germline variants cause PTEN Hamartoma Tumor Syndrome (PHTS), a rare disease with a variable genotype and phenotype. Knowledge about these spectra and genotype-phenotype associations could help diagnostics and potentially lead to personalized care. Therefore, we assessed the PHTS genotype and phenotype spectrum in a large cohort study. Methods: Information was collected of 510 index patients with pathogenic or likely pathogenic (LP/P) PTEN variants (n = 467) or variants of uncertain significance. Genotype-phenotype associations were assessed using logistic regression analyses adjusted for sex and age.Results: At time of genetic testing, the majority of children (n = 229) had macrocephaly (81%) or developmental delay (DD, 61%), and about half of the adults (n = 238) had cancer (51%), macrocephaly (61%), or cutaneous pathology (49%). Across PTEN, 268 LP/P variants were identified, with exon 5 as hotspot. Missense variants (n = 161) were mainly located in the phosphatase domain (PD, 90%) and truncating variants (n = 306) across all domains. A trend towards 2 times more often truncating variants was observed in adults (OR = 2.3, 95%CI = 1.5-3.4) and patients with cutaneous pathology (OR = 1.6, 95%CI = 1.1-2.5) or benign thyroid pathology (OR = 2.0, 95%CI = 1.1-3.5), with trends up to 2-4 times more variants in PD. Whereas patients with DD (OR = 0.5, 95%CI = 0.3-0.9) or macrocephaly (OR = 0.6, 95%CI = 0.4-0.9) had about 2 times less often truncating variants compared to missense variants. In DD patients these missense variants were often located in domain C2.Conclusion: The PHTS phenotypic diversity may partly be explained by the PTEN variant coding effect and the combination of coding effect and domain. PHTS patients with early-onset disease often had missense variants, and those with later-onset disease often truncating variants.

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