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Brambila-Tapia AJL, García-Ortiz JE, Brouillard P, Nguyen HL, Vikkula M, Ríos-González BE, Sandoval-Muñiz RDJ, Sandoval-Talamantes AK, Bobadilla-Morales L, Corona-Rivera JR, Arnaud-Lopez L. GATA2 null mutation associated with incomplete penetrance in a family with Emberger syndrome. Hematology 2017; 22:467-471. [PMID: 28271814 DOI: 10.1080/10245332.2017.1294551] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
INTRODUCTION GATA2 mutations are associated with several conditions, including Emberger syndrome which is the association of primary lymphedema with hematological anomalies and an increased risk for myelodysplasia and leukemia. OBJECTIVE To describe a family with Emberger syndrome with incomplete penetrance. METHODS A DNA sequencing of GATA2 gene was performed in the parents and offspring (five individuals in total). RESULTS The family consisted of 5 individuals with a GATA2 null mutation (c.130G>T, p.Glu44*); three of them were affected (two of which were deceased) while two remained unaffected at the age of 40 and 13 years old. The three affected siblings (two boys and one girl) presented with lymphedema of the lower limbs, recurrent warts, epistaxis and recurrent infections. Two died due to hematological abnormalities (AML and pancytopenia). In contrast, the two other family members who carry the same mutation (the mother and one brother) have not presented any symptoms and their blood tests remain normal. DISCUSSION Incomplete penetrance may indicate that GATA2 haploinsufficiency is not enough to produce the phenotype of Emberger syndrome. It could be useful to perform whole exome or genome sequencing, in cases where incomplete penetrance or high variable expressivity is described, in order to probably identify specific gene interactions that drastically modify the phenotype. In addition, skewed gene expression by an epigenetic mechanism of gene regulation should also be considered.
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Affiliation(s)
- Aniel Jessica Leticia Brambila-Tapia
- a Departamento de Psicología Básica , Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara , Guadalajara , Jalisco , México
| | - José Elías García-Ortiz
- b División de Genética, Centro de Investigación Biomédica de Occidente (CIBO) , Instituto Mexicano del Seguro Social (IMSS) , Guadalajara , Jalisco , México
| | - Pascal Brouillard
- c Human Molecular Genetics , de Duve Institute, Université catholique de Louvain , Brussels , Belgium
| | - Ha-Long Nguyen
- c Human Molecular Genetics , de Duve Institute, Université catholique de Louvain , Brussels , Belgium
| | - Miikka Vikkula
- c Human Molecular Genetics , de Duve Institute, Université catholique de Louvain , Brussels , Belgium.,d Walloon Excellence in Life sciences and Biotechnology (WELBIO) , Université catholique de Louvain , Brussels , Belgium
| | | | - Roberto de Jesús Sandoval-Muñiz
- f Doctorado en Genética Humana, Centro Universitario de Ciencias de la Salud (CUCS) , Universidad de Guadalajara , Guadalajara , Jalisco , México
| | - Ana Karen Sandoval-Talamantes
- f Doctorado en Genética Humana, Centro Universitario de Ciencias de la Salud (CUCS) , Universidad de Guadalajara , Guadalajara , Jalisco , México
| | - Lucina Bobadilla-Morales
- f Doctorado en Genética Humana, Centro Universitario de Ciencias de la Salud (CUCS) , Universidad de Guadalajara , Guadalajara , Jalisco , México.,g Departamento de Biología Molecular y Genómica , Instituto de Genética Humana, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara , Guadalajara , Jalisco , México
| | - Jorge Román Corona-Rivera
- f Doctorado en Genética Humana, Centro Universitario de Ciencias de la Salud (CUCS) , Universidad de Guadalajara , Guadalajara , Jalisco , México.,g Departamento de Biología Molecular y Genómica , Instituto de Genética Humana, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara , Guadalajara , Jalisco , México.,h Servicio de Genética, División de Pediatría , Hospital Civil de Guadalajara, 'Dr. Juan I. Menchaca' , Guadalajara , Jalisco , México
| | - Lisette Arnaud-Lopez
- h Servicio de Genética, División de Pediatría , Hospital Civil de Guadalajara, 'Dr. Juan I. Menchaca' , Guadalajara , Jalisco , México
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Arnaud-Lopez L, Usala G, Ceresini G, Mitchell BD, Pilia MG, Piras MG, Sestu N, Maschio A, Busonero F, Albai G, Dei M, Lai S, Mulas A, Crisponi L, Tanaka T, Bandinelli S, Guralnik JM, Loi A, Balaci L, Sole G, Prinzis A, Mariotti S, Shuldiner AR, Cao A, Schlessinger D, Uda M, Abecasis GR, Nagaraja R, Sanna S, Naitza S. Phosphodiesterase 8B gene variants are associated with serum TSH levels and thyroid function. Am J Hum Genet 2008; 82:1270-80. [PMID: 18514160 DOI: 10.1016/j.ajhg.2008.04.019] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2008] [Revised: 04/21/2008] [Accepted: 04/30/2008] [Indexed: 11/26/2022] Open
Abstract
Thyroid-stimulating hormone (TSH) controls thyroid growth and hormone secretion through binding to its G protein-coupled receptor (TSHR) and production of cyclic AMP (cAMP). Serum TSH is a sensitive indicator of thyroid function, and overt abnormalities in thyroid function lead to common endocrine disorders affecting approximately 10% of individuals over a life span. By genotyping 362,129 SNPs in 4,300 Sardinians, we identified a strong association (p = 1.3 x 10(-11)) between alleles of rs4704397 and circulating TSH levels; each additional copy of the minor A allele was associated with an increase of 0.13 muIU/ml in TSH. The single-nucleotide polymorphism (SNP) is located in intron 1 of PDE8B, encoding a high-affinity cAMP-specific phosphodiesterase. The association was replicated in 4,158 individuals, including additional Sardinians and two genetically distant cohorts from Tuscany and the Old Order Amish (overall p value = 1.9 x 10(-20)). In addition to association of TSH levels with SNPs in PDE8B, our genome scan provided evidence for association with PDE10A and several biologically interesting candidates in a focused analysis of 24 genes. In particular, we found evidence for association of TSH levels with SNPs in the THRB (rs1505287, p = 7.3 x 10(-5)), GNAQ (rs10512065, p = 2.0 x 10(-4)), TG (rs2252696, p = 2.2 x 10(-3)), POU1F1 (rs1976324, p = 3.9 x 10(-3)), PDE4D (rs27178, p = 8.3 x 10(-3)), and TSHR (rs4903957, p = 8.6 x 10(-3)) loci. Overall, the results suggest a primary effect of PDE8B variants on cAMP levels in the thyroid. This would affect production of T4 and T3 and feedback to alter TSH release by the pituitary. PDE8B may thus provide a candidate target for the treatment of thyroid dysfunction.
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