1
|
Martins-Costa MC, Lindsey SC, Cunha LL, Carreiro-Filho FP, Cortez AP, Holanda ME, Farias JWMD, Lima SB, Ferreira LAA, Maia Filho PC, Camacho CP, Furuzawa GK, Kunii IS, Dias-da-Silva MR, Martins JRM, Maciel RMB. A pioneering RET genetic screening study in the State of Ceará, Brazil, evaluating patients with medullary thyroid cancer and at-risk relatives: experience with 247 individuals. Arch Endocrinol Metab 2019; 62:623-635. [PMID: 30624503 PMCID: PMC10118677 DOI: 10.20945/2359-3997000000088] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 09/25/2018] [Indexed: 11/23/2022]
Abstract
OBJECTIVE Initial diagnosis of medullary thyroid carcinoma (MTC) is frequently associated with advanced stages and a poor prognosis. Thus, the need for earlier diagnoses and detection in relatives at risk for the disease has led to increased use of RET genetic screening. SUBJECTS AND METHODS We performed RET screening in 247 subjects who were referred to the Brazilian Research Consortium for Multiple Endocrine Neoplasia (BRASMEN) Center in the State of Ceará. Direct genetic sequencing was used to analyze exons 8, 10, 11, and 13-16 in MTC index cases and specific exons in at risk relatives. Afterward, clinical follow-up was offered to all the patients with MTC and their affected relatives. RESULTS RET screening was performed in 60 MTC index patients and 187 at-risk family members. At the initial clinical assessment of the index patients, 54 (90%) were diagnosed with apparently sporadic disease and 6 (10%) diagnosed with hereditary disease. After RET screening, we found that 31 (52%) index patients had sporadic disease, and 29 (48%) had hereditary disease. Regarding at-risk relatives, 73/187 were mutation carriers. Mutations in RET codon 804 and the rare p.M918V mutation were the most prevalent. CONCLUSIONS Performing RET screening in Ceará allowed us to identify a different mutation profile in this region compared with other areas. RET screening also enabled the diagnosis of a significant number of hereditary MTC patients who were initially classified as sporadic disease patients and benefited their relatives, who were unaware of the risks and the consequences of bearing a RET mutation.
Collapse
Affiliation(s)
- Maria Cecília Martins-Costa
- Centro de Doenças da Tiroide e Laboratório de Endocrinologia Molecular e Translacional, Divisão de Endocrinologia, Departamento de Medicina, Escola Paulista de Medicina, Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brasil.,Centro de Endocrinologia e Metabologia, Hospital Geral de Fortaleza (HGF), Fortaleza, CE, Brasil.,Departamento de Medicina, Universidade de Fortaleza (UNIFOR), Fortaleza, CE, Brasil
| | - Susan C Lindsey
- Centro de Doenças da Tiroide e Laboratório de Endocrinologia Molecular e Translacional, Divisão de Endocrinologia, Departamento de Medicina, Escola Paulista de Medicina, Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brasil
| | - Lucas L Cunha
- Centro de Doenças da Tiroide e Laboratório de Endocrinologia Molecular e Translacional, Divisão de Endocrinologia, Departamento de Medicina, Escola Paulista de Medicina, Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brasil
| | | | - André P Cortez
- Santa Casa de Misericórdia de Fortaleza, Fortaleza, CE, Brasil.,Hospital Geral Dr. César Cals, Fortaleza, CE, Brasil
| | | | - J Wilson M de Farias
- Departamento de Cirurgia de Cabeça e Pescoço, Hospital Geral de Fortaleza, Fortaleza, CE, Brasil.,Santa Casa de Misericórdia de Fortaleza, Fortaleza, CE, Brasil
| | - Sérgio B Lima
- Santa Casa de Misericórdia de Fortaleza, Fortaleza, CE, Brasil
| | - Luís A Albano Ferreira
- Hospital Universitário Walter Cantídio, Universidade Federal do Ceará (UFC), Fortaleza, CE, Brasil.,Hospital Infantil Albert Sabin, Fortaleza, CE, Brasil
| | | | - Cléber P Camacho
- Centro de Doenças da Tiroide e Laboratório de Endocrinologia Molecular e Translacional, Divisão de Endocrinologia, Departamento de Medicina, Escola Paulista de Medicina, Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brasil
| | - Gilberto K Furuzawa
- Centro de Doenças da Tiroide e Laboratório de Endocrinologia Molecular e Translacional, Divisão de Endocrinologia, Departamento de Medicina, Escola Paulista de Medicina, Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brasil
| | - Ilda S Kunii
- Centro de Doenças da Tiroide e Laboratório de Endocrinologia Molecular e Translacional, Divisão de Endocrinologia, Departamento de Medicina, Escola Paulista de Medicina, Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brasil
| | - Magnus R Dias-da-Silva
- Centro de Doenças da Tiroide e Laboratório de Endocrinologia Molecular e Translacional, Divisão de Endocrinologia, Departamento de Medicina, Escola Paulista de Medicina, Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brasil
| | - João R M Martins
- Centro de Doenças da Tiroide e Laboratório de Endocrinologia Molecular e Translacional, Divisão de Endocrinologia, Departamento de Medicina, Escola Paulista de Medicina, Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brasil.,Divisão de Biologia Molecular, Departamento de Bioquímica, Escola Paulista de Medicina, Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brasil
| | - Rui M B Maciel
- Centro de Doenças da Tiroide e Laboratório de Endocrinologia Molecular e Translacional, Divisão de Endocrinologia, Departamento de Medicina, Escola Paulista de Medicina, Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brasil.,Fleury Medicina e Saúde, São Paulo, SP, Brasil
| |
Collapse
|
2
|
Kizys MML, Louzada RA, Mitne-Neto M, Jara JR, Furuzawa GK, de Carvalho DP, Dias-da-Silva MR, Nesi-França S, Dupuy C, Maciel RMB. DUOX2 Mutations Are Associated With Congenital Hypothyroidism With Ectopic Thyroid Gland. J Clin Endocrinol Metab 2017; 102:4060-4071. [PMID: 28666341 DOI: 10.1210/jc.2017-00832] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 06/22/2017] [Indexed: 12/11/2022]
Abstract
CONTEXT Thyroid dysgenesis (TD) is the leading cause of congenital hypothyroidism (CH). The etiology of TD remains unknown in ∼90% of cases, the most common form being thyroid ectopia (TE) (48% to 61%). OBJECTIVE To search for candidate genes in hypothyroid children with TE. DESIGN, SETTING, AND PARTICIPANTS We followed a cohort of 268 children with TD and performed whole-exome sequencing (WES) in three children with CH with TE (CHTE) and compared them with 18 thyroid-healthy controls. We then screened an additional 41 children with CHTE by Sanger sequencing and correlated the WES and Sanger molecular findings with in vitro functional analysis. MAIN OUTCOME MEASURES Genotyping, mutation prediction analysis, and in vitro functional analysis. RESULTS We identified seven variants in the DUOX2 gene, namely G201E, L264CfsX57, P609S, M650T, E810X, M822V, and E1017G, and eight known variations. All children carrying DUOX2 variations had high thyroid-stimulating hormone levels at neonatal diagnosis. All mutations were localized in the N-terminal segment, and three of them led to effects on cell surface targeting and reactive oxygen species generation. The DUOX2 mutants also altered the interaction with the maturation factor DUOXA2 and the formation of a stable DUOX2/DUOXA2 complex at the cell surface, thereby impairing functional enzymatic activity. We observed no mutations in the classic genes related to TD or in the DUOX1 gene. CONCLUSION Our findings suggest that, in addition to thyroid hormonogenesis, the DUOX2 N-terminal domain may play a role in thyroid development.
Collapse
Affiliation(s)
- Marina M L Kizys
- Laboratory of Molecular and Translational Endocrinology, Department of Medicine, Universidade Federal de São Paulo, São Paulo 04039-032, Brazil
| | - Ruy A Louzada
- UMR 8200 CNRS, Villejuif, 94800, France
- Institut Gustave Roussy, Villejuif, 94800, France
- Université Paris-Saclay, Orsay, 91405, France
- Laboratory of Endocrine Physiology Doris Rosenthal, Instituto de Biofisica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Miguel Mitne-Neto
- Fleury Group, São Paulo 04344-070, Brazil
- Human Genome and Stem Cell Research Center, Biosciences Institute, Universidade de São Paulo, São Paulo 05508-900, Brazil
| | - Jessica R Jara
- Department of Pediatrics, Universidade Federal do Paraná, Curitiba 80060-240, Brazil
| | - Gilberto K Furuzawa
- Laboratory of Molecular and Translational Endocrinology, Department of Medicine, Universidade Federal de São Paulo, São Paulo 04039-032, Brazil
| | - Denise P de Carvalho
- Laboratory of Endocrine Physiology Doris Rosenthal, Instituto de Biofisica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Magnus R Dias-da-Silva
- Laboratory of Molecular and Translational Endocrinology, Department of Medicine, Universidade Federal de São Paulo, São Paulo 04039-032, Brazil
| | - Suzana Nesi-França
- Department of Pediatrics, Universidade Federal do Paraná, Curitiba 80060-240, Brazil
| | - Corinne Dupuy
- UMR 8200 CNRS, Villejuif, 94800, France
- Institut Gustave Roussy, Villejuif, 94800, France
- Université Paris-Saclay, Orsay, 91405, France
| | - Rui M B Maciel
- Laboratory of Molecular and Translational Endocrinology, Department of Medicine, Universidade Federal de São Paulo, São Paulo 04039-032, Brazil
- Fleury Group, São Paulo 04344-070, Brazil
| |
Collapse
|
3
|
Martins-Costa MC, Cunha LL, Lindsey SC, Camacho CP, Dotto RP, Furuzawa GK, Sousa MSA, Kasamatsu TS, Kunii IS, Martins MM, Machado AL, Martins JRM, Dias-da-Silva MR, Maciel RMB. M918V RET mutation causes familial medullary thyroid carcinoma: study of 8 affected kindreds. Endocr Relat Cancer 2016; 23:909-920. [PMID: 27807060 DOI: 10.1530/erc-16-0141] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 10/07/2016] [Indexed: 12/13/2022]
Abstract
Germline mutations in codon 918 of exon 16 of the RET gene (M918T) are classically associated with multiple endocrine neoplasia type 2B (MEN 2B) with highly aggressive medullary thyroid cancer (MTC), pheochromocytoma and a unique phenotype. The objectives of this study are to describe the rare M918V RET mutation discovered in 8 MTC kindreds from Brazil lacking the MEN 2B phenotype classically observed in M918T patients and to investigate the presence of a founder effect for this germline mutation. Eight apparently sporadic MTC cases were diagnosed with the germline M918V RET mutation. Subsequently, their relatives underwent clinical and genetic assessment (n = 113), and M918V was found in 42 of them. Until today, 20/50 M918V carriers underwent thyroidectomy and all presented MTC/C-cell hyperplasia; the remainder carriers are on clinical follow-up. None of the M918V carriers presented clinical features of MEN 2B. Their clinical presentation was heterogeneous, and the age at tumor diagnosis ranged from 24 to 59 years. Lymph node metastases were present in 12/20 patients, and presumable distant metastases in 2/20; in contrast, we observed a carrier of up to 87 years of age without evidence of MTC. Ethnographic fieldwork and haplotype analyses suggested that the founder mutation first settled in that area fifteen generations ago and originated from Portugal. Our study is the first to demonstrate the RET M918V mutation co-segregating in 8 familial MTC kindreds with validated evidence of a founder effect. We suggest that M918V MTC should be clinically considered an American Thyroid Association (ATA) moderate-risk category.
Collapse
Affiliation(s)
- M Cecília Martins-Costa
- Department of MedicineThyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
- Center for Endocrinology and MetabologyHospital Geral de Fortaleza, Fortaleza, CE, Brazil
- Department of MedicineUniversidade de Fortaleza, Fortaleza, CE, Brazil
| | - Lucas L Cunha
- Department of MedicineThyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Susan C Lindsey
- Department of MedicineThyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Cleber P Camacho
- Department of MedicineThyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Renata P Dotto
- Department of MedicineThyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Gilberto K Furuzawa
- Department of MedicineThyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - M Sharmila A Sousa
- Department of MedicineThyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Teresa S Kasamatsu
- Department of MedicineThyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Ilda S Kunii
- Department of MedicineThyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Márcio M Martins
- Department of MedicineThyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Alberto L Machado
- Department of MedicineThyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
- Fleury Medicine and HealthSão Paulo, SP, Brazil
| | - João R M Martins
- Department of MedicineThyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Magnus R Dias-da-Silva
- Department of MedicineThyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Rui M B Maciel
- Department of MedicineThyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
- Fleury Medicine and HealthSão Paulo, SP, Brazil
| |
Collapse
|
4
|
Paninka RM, Mazzotti DR, Kizys MML, Vidi AC, Rodrigues H, Silva SP, Kunii IS, Furuzawa GK, Arcisio-Miranda M, Dias-da-Silva MR. Whole genome and exome sequencing realignment supports the assignment of KCNJ12, KCNJ17, and KCNJ18 paralogous genes in thyrotoxic periodic paralysis locus: functional characterization of two polymorphic Kir2.6 isoforms. Mol Genet Genomics 2016; 291:1535-44. [PMID: 27008341 DOI: 10.1007/s00438-016-1185-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 02/22/2016] [Indexed: 11/28/2022]
Abstract
Next-generation sequencing (NGS) has enriched the understanding of the human genome. However, homologous or repetitive sequences shared among genes frequently produce dubious alignments and can puzzle NGS mutation analysis, especially for paralogous potassium channels. Potassium inward rectifier (Kir) channels are important to establish the resting membrane potential and regulating the muscle excitability. Mutations in Kir channels cause disorders affecting the heart and skeletal muscle, such as arrhythmia and periodic paralysis. Recently, a susceptibility muscle channelopathy-thyrotoxic periodic paralysis (TPP)-has been related to Kir2.6 channel (KCNJ18 gene). Due to their high nucleotide sequence homology, variants found in the potassium channels Kir2.6 and Kir2.5 have been mistakenly attributable to Kir2.2 polymorphisms or mutations. We aimed at elucidating nucleotide misalignments by performing realignment of whole exome sequencing (WES) and whole genome sequencing (WGS) reads to specific Kir2.2, Kir2.5, and Kir2.6 cDNA sequences using BWA-MEM/GATK pipeline. WES/WGS reads correctly aligned 26.9/43.2, 37.6/31.0, and 35.4/25.8 % to Kir2.2, Kir2.5, and Kir2.6, respectively. Realignment was able to reduce over 94 % of misalignments. No putative mutations of Kir2.6 were identified for the three TPP patients included in the cohort of 36 healthy controls using either WES or WGS. We also distinguished sequences for a single Kir2.2, a single Kir2.5 sequence, and two Kir2.6 isoforms, which haplotypes were named RRAI and QHEV, based on changes at 39, 40, 56, and 249 residues. Electrophysiology records on both Kir2.6_RRAI and _QHEV showed typical rectifying currents. In our study, the reduction of misalignments allowed the elucidation of paralogous gene sequences and two distinct Kir2.6 haplotypes, and pointed the need for checking the frequency of these polymorphisms in other populations with different genetic background.
Collapse
Affiliation(s)
- Rolf M Paninka
- Laboratory of Molecular and Translational Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Pedro de Toledo, 669, 11° andar, São Paulo, SP, 04039-032, Brazil.,Laboratory of Structural and Functional Neurobiology, Department of Biophysics, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Diego R Mazzotti
- Department of Psychobiology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Marina M L Kizys
- Laboratory of Molecular and Translational Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Pedro de Toledo, 669, 11° andar, São Paulo, SP, 04039-032, Brazil
| | - Angela C Vidi
- Laboratory of Molecular and Translational Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Pedro de Toledo, 669, 11° andar, São Paulo, SP, 04039-032, Brazil
| | - Hélio Rodrigues
- Department of Psychobiology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Silas P Silva
- Laboratory of Integrative Biology and Metabolism, Department of Biophysics, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Ilda S Kunii
- Laboratory of Molecular and Translational Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Pedro de Toledo, 669, 11° andar, São Paulo, SP, 04039-032, Brazil
| | - Gilberto K Furuzawa
- Laboratory of Molecular and Translational Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Pedro de Toledo, 669, 11° andar, São Paulo, SP, 04039-032, Brazil
| | - Manoel Arcisio-Miranda
- Laboratory of Structural and Functional Neurobiology, Department of Biophysics, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Magnus R Dias-da-Silva
- Laboratory of Molecular and Translational Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Pedro de Toledo, 669, 11° andar, São Paulo, SP, 04039-032, Brazil.
| |
Collapse
|
5
|
Santarosa VA, Orlandi DM, Fiorin LB, Kasamatsu TS, Furuzawa GK, Kunii IS, Padovani RP, Marone MMS, Castiglioni ML, Vieira JGH, Maciel RMB, Dias-da-Silva MR, Martins JRM. Low iodine diet does not improve the efficacy of radioiodine for the treatment of Graves’ disease. Arch Endocrinol Metab 2015; 59:501-6. [DOI: 10.1590/2359-3997000000082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 06/18/2015] [Indexed: 11/22/2022]
Affiliation(s)
| | | | | | | | | | | | - Rosália P. Padovani
- Universidade Federal de São Paulo, Brasil; Irmandade Santa Casa de Misericórdia de São Paulo, Brasil
| | | | | | | | | | | | | |
Collapse
|
6
|
Giuffrida FMA, Calliari LE, Manna TD, Ferreira JG, Saddi-Rosa P, Kunii IS, Furuzawa GK, Dias-da-Silva MR, Reis AF. A novel glucokinase deletion (p.Lys32del) and five previously described mutations co-segregate with the phenotype of mild familial hyperglycaemia (MODY2) in Brazilian families. Diabetes Res Clin Pract 2013; 100:e42-5. [PMID: 23433541 DOI: 10.1016/j.diabres.2013.01.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Accepted: 01/25/2013] [Indexed: 11/23/2022]
Abstract
Six Brazilian families with mild familial hyperglycaemia have been screened for glucokinase (GCK) mutations. All had mutations that co-segregated with the phenotype. One of the mutations, the deletion 96_98delAAG (p.Lys32del), had not been previously described, reinforcing the worldwide prevalence of GCK MODY and widespread existence of undetected new mutations.
Collapse
Affiliation(s)
- Fernando M A Giuffrida
- Laboratory of Molecular and Translational Endocrinology, Universidade Federal de São Paulo, São Paulo, Brazil
| | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Giuffrida FMA, Furuzawa GK, Kasamatsu TS, Oliveira MM, Reis AF, Dib SA. HNF1A gene polymorphisms and cardiovascular risk factors in individuals with late-onset autosomal dominant diabetes: a cross-sectional study. Cardiovasc Diabetol 2009; 8:28. [PMID: 19490620 PMCID: PMC2696421 DOI: 10.1186/1475-2840-8-28] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2009] [Accepted: 06/02/2009] [Indexed: 11/24/2022] Open
Abstract
Background Type 2 diabetes mellitus (T2DM) is a genetically heterogeneous disease, hepatocyte nuclear factor-1 homeobox A (HNF1A) single-nucleotide polymorphisms (SNPs) playing a minor role in its pathogenesis. HNF1A is a frequent cause of monogenic diabetes, albeit with early-onset. Some uncommon subgroups like late-onset autosomal dominant diabetes mellitus (LOADDM) may present peculiar inheritance patterns with a stronger familial component. This study aims to investigate the relationship of HNF1A SNPs with cardiovascular risk factors in this group, as well as to characterize them in contrast with classical T2DM (CT2DM). Methods eighteen LOADDM (age at onset > 40 y.o.; diabetes in 3 contiguous generations, uniparental lineage) along with 48 CT2DM patients and 42 normoglycemic controls (N group) have been evaluated for cardiovascular risk factors and SNPs of HNF1A. Results LOADDM showed significantly higher frequencies of SNPs A98V (22.2% vs 2.1%, p = 0.02) and S487N (72.2% vs 43.8%, p = 0.049) of HNF1A compared to CT2DM. I27L did not show significant difference (66.7% vs 45.8%), but associated with lower risk of hypertriglyceridemia (OR 0.16, 95% CI 0.04–0.65, p = 0.01). "Protective effect" was independent from other well-known predictive risk factors for hypertriglyceridemia, such as waist circumference (OR 1.09 per 1 cm increase, p = 0.01) and HDL (OR 0.01 per 1 mmol/l, p = 0.005), after logistic regression. Conclusion Late onset autosomal dominant diabetes mellitus is clinically indistinguishable from classical type 2 diabetes individuals. However, LOADDM group is enriched for common HNF1A polymorphisms A98V and S487N. I27L showed "protective effect" upon hypertriglyceridemia in this sample of individuals, suggesting a role for HNF1A on diabetic individuals' lipid profile. These data contribute to the understanding of the complex interactions between genes, hyperglycemia and cardiovascular risk factors development in type 2 diabetes mellitus.
Collapse
Affiliation(s)
- Fernando M A Giuffrida
- Universidade Federal de São Paulo, Departamento de Medicina, Disciplina de Endocrinologia, R, Pedro de Toledo, 981 12o andar, Vila Clementino, Sao Paulo, SP - Brazil.
| | | | | | | | | | | |
Collapse
|
8
|
Furuzawa GK, Giuffrida FMA, Oliveira CSV, Chacra AR, Dib SA, Reis AF. Low prevalence of MODY2 and MODY3 mutations in Brazilian individuals with clinical MODY phenotype. Diabetes Res Clin Pract 2008; 81:e12-4. [PMID: 18672310 DOI: 10.1016/j.diabres.2008.06.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2008] [Revised: 06/17/2008] [Accepted: 06/21/2008] [Indexed: 11/22/2022]
Abstract
Prevalence of MODY2 and MODY3 mutations has been assessed in 23 Brazilian families with MODY phenotype. Mutations in HNF-1alpha have been found in 3 families (13%) and 2 families (8.7%) had new glucokinase mutations. These genes do not explain the majority of MODY cases in Brazilian population.
Collapse
Affiliation(s)
- Gilberto K Furuzawa
- Division of Diabetes, Molecular Endocrinology Laboratory, Federal University of São Paulo, São Paulo, Brazil
| | | | | | | | | | | |
Collapse
|
9
|
Esteves RZ, Kasamatsu TS, Kunii IS, Furuzawa GK, Vieira JGH, Maciel RM. Desenvolvimento de um método para a determinação da iodúria e sua aplicação na excreção urinária de iodo em escolares brasileiros. ACTA ACUST UNITED AC 2007; 51:1477-84. [DOI: 10.1590/s0004-27302007000900010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2007] [Accepted: 07/30/2007] [Indexed: 11/21/2022]
Abstract
Desenvolvemos método semi-automatizado em placa para a determinação de iodo urinário; utilizamos, primeiramente, a digestão das amostras de urina com persulfato de amônio e, a seguir, estimamos a quantidade de iodo pela redução do sulfato cérico amoniacal. O método foi validado no inquérito nacional de monitoração da deficiência de iodo, realizado em 1994, que empregou um sistema de amostragem mista da população brasileira e analisou a iodúria em 16.803 amostras de urina de escolares obtidas por coleta casual. Em 401 municípios estudados encontramos 4 com deficiência de iodo de grau moderado (Almas, Arraias e Paraná, em Tocantins, e Cocos, na Bahia) e 116 de grau leve. Desta forma, este estudo mostrou a presença de regiões com deficiência de iodo em 1994, a despeito do programa de iodação do sal. Dados recentes de outros autores, com número menor de municípios, indicam excesso de ingestão de iodo. Assim, num país de dimensões continentais e heterogêneo como o Brasil, é necessária a realização de avaliações periódicas de amplitude nacional para a verificação da ingestão de iodo da população. O método apresentado neste estudo apresenta as características de simplicidade e eficiência necessários para este tipo de estudo populacional.
Collapse
|
10
|
Abstract
Estima-se que perto de 5% dos indivíduos classificados como portadores de diabetes mellitus (DM) tipo 2 e 10% daqueles considerados como tipo 1 (anteriormente classificado como juvenil) sejam, na verdade, portadores de mutações MODY. Nesta forma de DM ocorre uma co-segregação evidente de algumas mutações com a hiperglicemia, fato este reproduzido em inúmeras famílias estudadas em várias populações do mundo. Caracteriza-se por ser uma das poucas causas de DM cujo modo de transmissão da predisposição genética ocorre de uma forma autossômica-dominante, compondo o grupo chamado de DM monogênicos, onde os outros representantes têm uma prevalência bastante rara. As mutações nos genes MODY, mesmo no estado heterozigoto, apresentam um forte impacto no fenótipo (alta penetrância), sendo que 95% dos indivíduos nascidos com alguma mutação MODY serão diabéticos ou apresentarão alterações no âmbito do metabolismo glicídico antes dos 55 anos de idade. Este trabalho objetiva a discussão desta forma de DM, enfatizando suas características clínicas e genéticas mais relevantes. A pesquisa sistemática de mutações MODY começa a ser feita de forma rotineira em vários países, havendo uma tendência de se colocar este recurso diagnóstico como um exame na prática da diabetologia.
Collapse
|
11
|
Dias da Silva MR, Cerutti JM, Tengan CH, Furuzawa GK, Vieira TCA, Gabbai AA, Maciel RMB. Mutations linked to familial hypokalaemic periodic paralysis in the calcium channel alpha1 subunit gene (Cav1.1) are not associated with thyrotoxic hypokalaemic periodic paralysis. Clin Endocrinol (Oxf) 2002; 56:367-75. [PMID: 11940049 DOI: 10.1046/j.1365-2265.2002.01481.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To investigate whether patients with thyrotoxic hypokalaemic periodic paralysis (THPP) have the same molecular defect in the calcium channel gene described in familial hypokalaemic periodic paralysis (FHPP), as the symptoms of both diseases are comparable, we analysed, in patients with THPP, the presence of mutations R528H, R1239H and R1239G on the S4 voltage-sensing transmembrane segment of the alpha1 subunit of the calcium channel gene (Cav1.1). DESIGN AND PATIENTS Genomic DNA was extracted from peripheral blood from 14 patients with THPP, 13 sporadic cases and one with a family history. An FHPP family was selected as a positive control. The exons bearing the described mutations were amplified by PCR, screened by single-strand conformation polymorphism (SSCP), and further sequenced. MEASUREMENTS THPP was diagnosed both clinically and through laboratory tests, all patients having elevated levels of thyroid hormones (T4, T3 or free T4), suppressed TSH and plasma potassium below 3 small middle dot5 mmol/l. RESULTS No evidence of the described mutations was found in patients with THPP. Furthermore, we did not detect any mutations in any of the four full S4 voltage-sensing transmembrane segments of Cav1 small middle dot1 (DIS4, DIIS4, DIIIS4 and DIVS4) by direct sequencing. However, close to the R528H mutation, we identified two single nucleotide polymorphisms at nucleotides 1551 and 1564 in both familial and sporadic cases with THPP. In addition, we were able to detect the R528H mutation in the DIIS4 transmembrane segment in all members of the FHPP family. CONCLUSION Mutations linked to familial hypokalaemic periodic paralysis in the calcium channel alpha1 subunit gene (Cav1.1) are not associated with thyrotoxic hypokalaemic periodic paralysis. However, polymorphisms in nucleotides 1551 and 1564 in the exon 11 were found in patients with familial hypokalaemic periodic paralysis and thyrotoxic hypokalaemic periodic paralysis in higher frequency than in controls. The polymorphisms identified within the Cav1.1 gene are associated with thyrotoxic hypokalaemic periodic paralysis and represent a novel finding.
Collapse
Affiliation(s)
- Magnus R Dias da Silva
- Department of Medicine, Laboratory of Molecular Endocrinology, Division of Endocrinology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | | | | | | | | | | | | |
Collapse
|
12
|
Camargo AA, Samaia HP, Dias-Neto E, Simão DF, Migotto IA, Briones MR, Costa FF, Nagai MA, Verjovski-Almeida S, Zago MA, Andrade LE, Carrer H, El-Dorry HF, Espreafico EM, Habr-Gama A, Giannella-Neto D, Goldman GH, Gruber A, Hackel C, Kimura ET, Maciel RM, Marie SK, Martins EA, Nobrega MP, Paco-Larson ML, Pardini MI, Pereira GG, Pesquero JB, Rodrigues V, Rogatto SR, da Silva ID, Sogayar MC, Sonati MF, Tajara EH, Valentini SR, Alberto FL, Amaral ME, Aneas I, Arnaldi LA, de Assis AM, Bengtson MH, Bergamo NA, Bombonato V, de Camargo ME, Canevari RA, Carraro DM, Cerutti JM, Correa ML, Correa RF, Costa MC, Curcio C, Hokama PO, Ferreira AJ, Furuzawa GK, Gushiken T, Ho PL, Kimura E, Krieger JE, Leite LC, Majumder P, Marins M, Marques ER, Melo AS, Melo MB, Mestriner CA, Miracca EC, Miranda DC, Nascimento AL, Nobrega FG, Ojopi EP, Pandolfi JR, Pessoa LG, Prevedel AC, Rahal P, Rainho CA, Reis EM, Ribeiro ML, da Ros N, de Sa RG, Sales MM, Sant'anna SC, dos Santos ML, da Silva AM, da Silva NP, Silva WA, da Silveira RA, Sousa JF, Stecconi D, Tsukumo F, Valente V, Soares F, Moreira ES, Nunes DN, Correa RG, Zalcberg H, Carvalho AF, Reis LF, Brentani RR, Simpson AJ, de Souza SJ, Melo M. The contribution of 700,000 ORF sequence tags to the definition of the human transcriptome. Proc Natl Acad Sci U S A 2001; 98:12103-8. [PMID: 11593022 PMCID: PMC59775 DOI: 10.1073/pnas.201182798] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Open reading frame expressed sequences tags (ORESTES) differ from conventional ESTs by providing sequence data from the central protein coding portion of transcripts. We generated a total of 696,745 ORESTES sequences from 24 human tissues and used a subset of the data that correspond to a set of 15,095 full-length mRNAs as a means of assessing the efficiency of the strategy and its potential contribution to the definition of the human transcriptome. We estimate that ORESTES sampled over 80% of all highly and moderately expressed, and between 40% and 50% of rarely expressed, human genes. In our most thoroughly sequenced tissue, the breast, the 130,000 ORESTES generated are derived from transcripts from an estimated 70% of all genes expressed in that tissue, with an equally efficient representation of both highly and poorly expressed genes. In this respect, we find that the capacity of the ORESTES strategy both for gene discovery and shotgun transcript sequence generation significantly exceeds that of conventional ESTs. The distribution of ORESTES is such that many human transcripts are now represented by a scaffold of partial sequences distributed along the length of each gene product. The experimental joining of the scaffold components, by reverse transcription-PCR, represents a direct route to transcript finishing that may represent a useful alternative to full-length cDNA cloning.
Collapse
Affiliation(s)
- A A Camargo
- Ludwig Institute for Cancer Research, 01509-010, São Paulo, Brazil
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|