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Holtz AP, Souza LT, Ribeiro EM, Acosta AX, Lago RMRS, Simoni G, Llerena JC, Félix TM. Genetic analysis of osteogenesis imperfecta in a large Brazilian cohort. Bone 2023; 169:116683. [PMID: 36709916 DOI: 10.1016/j.bone.2023.116683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 07/27/2022] [Revised: 12/27/2022] [Accepted: 01/23/2023] [Indexed: 01/28/2023]
Abstract
INTRODUCTION Osteogenesis imperfecta (OI) is a genetically and clinically heterogeneous disorder caused by disruption of type I collagen synthesis. Previous Brazilian molecular OI studies have been restricted to case reports or small cohorts. The Brazilian OI Network (BOIN) is a multicenter study collecting clinical OI treatment data from five reference centers in three regions of Brazil. OBJECTIVE To describe the molecular analysis of a large cohort of OI registered at BOIN. METHODS Targeted next-generation sequencing (NGS) was performed at a centralized laboratory with the Ion Torrent platform, covering 99.6 % of the coding regions of 18 OI-associated genes. Clinical information was obtained from a clinical database. RESULTS We included 156 subjects in the molecular analyses. Variants were detected in 121 subjects: 65 (53.7 %) in COL1A1, 42 (34.7 %) in COL1A2, 2 (1.7 %) in IFITM5, one (0.8 %) in CRTAP, three (2.5 %) in P3H1, two (1.7 %) in PPIB, four (3.3 %) FKBP10, one (0.8 %) in SERPINH1, and one (0.8 %) in TMEM38B. Ninety-one distinct variants were identified, of which 26 were novel. Of the 107 variants identified in COL1A1 and COL1A2, 24.5 % cause mild OI, while the remaining 75.5 % cause moderate, severe, or lethal OI, of which 49.3 % are glycine to serine substitutions. A single variant in FKBP10 (c.179A>C; p.Gln60Pro) was found in three unrelated and non-consanguineous participants living in the same geographic area in Northeast Brazil, suggesting a possible founder effect. CONCLUSION Consistent with the literature, 88.4 % of the subjects had a variant in the COL1A1 and COL1A2 genes, with 10 % inherited in an autosomal recessive manner. Notably, one variant in FKBP10 with a potential founder effect requires further investigation. Data from this large cohort improves our understanding of genotype-phenotype correlations for OI in Brazil.
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Affiliation(s)
- A P Holtz
- Post Graduate Program in Child and Adolescent Health, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Genomic Medicine Laboratory, Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil
| | - L T Souza
- Genomic Medicine Laboratory, Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil
| | - E M Ribeiro
- Genetics Service, Hospital Infantil Albert Sabin, Fortaleza, Brazil
| | - A X Acosta
- Pediatric Department, Hospital Universitário Prof. Edgar Santos, Salvador, Brazil
| | - R M R S Lago
- Pediatric Department, Hospital Universitário Prof. Edgar Santos, Salvador, Brazil
| | - G Simoni
- Pediatric Endocrinology Department, Hospital Infantil Joana de Gusmão, Florianópolis, Brazil
| | - J C Llerena
- Medical Genetics Department, Instituto Nacional Fernandes Figueira - Fiocruz, Rio de Janeiro, Brazil
| | - T M Félix
- Post Graduate Program in Child and Adolescent Health, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Genomic Medicine Laboratory, Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil; Medical Genetics Service, Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil.
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Zambrano MB, Félix TM, Mello ED. Calcium intake improvement after nutritional intervention in paediatric patients with osteogenesis imperfecta. J Hum Nutr Diet 2019; 32:619-624. [PMID: 31037781 DOI: 10.1111/jhn.12657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 01/07/2023]
Abstract
BACKGROUND In several bone disorders, adequate calcium intake is a coadjuvant intervention to regular treatment. Osteogenesis imperfecta (OI) is a collagen disorder with a range of symptoms, ranging from fractures to minimum trauma, and it is typically treated with bisphosphonates. In the present study, we evaluate the impact of a nutritional intervention (NI) on dietary calcium intake and bone mineral density (BMD) in paediatric patients with OI. METHODS A nonrandomised clinical trial was designed with a NI. Dietary calcium intake, anthropometry and clinical features were assessed at baseline, including anthropometry, basal metabolic rate (BMR), BMD. In addition, a food guidance form was developed and sent to patients by mail. After 12 months, clinical features of patients were reassessed and compared with the baseline data. RESULTS Fifty-two children and adolescents were enrolled. Significant increases in total calcium intake (mg day-1 ), percentage of adequate calcium intake (%) and number of cups of milk ingested were observed after NI. We detected a positive correlation between the variation of BMD and milk consumption in patients treated with bisphosphonate. CONCLUSIONS We observed an increase in calcium intake in patients with OI. This finding demonstrates the importance of nutrition therapy as part of a multidisciplinary treatment approach for bone health.
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Affiliation(s)
- M B Zambrano
- Post Graduate Program in Child and Adolescent Health, University of Rio Grande do Sul, Porto Alegre, Brazil
| | - T M Félix
- Post Graduate Program in Child and Adolescent Health, University of Rio Grande do Sul, Porto Alegre, Brazil.,Medical Genetics Service, Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil
| | - E D Mello
- Post Graduate Program in Child and Adolescent Health, University of Rio Grande do Sul, Porto Alegre, Brazil.,Department of Pediatrics, School of Medicine, University of Rio Grande do Sul, Porto Alegre, Brazil
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Albuquerque N, Pinto J, Loureiro M, Félix T, Peixoto I. Ultrasound-guided genicular nerve block in chronic knee pain. Ann Phys Rehabil Med 2018. [DOI: 10.1016/j.rehab.2018.05.234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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de Souza LT, Kowalski TW, Ferrari J, Monlléo IL, Ribeiro EM, de Souza J, Fett-Conte AC, de Araujo TK, Gil-da-Silva-Lopes VL, Ribeiro-dos-Santos ÂKC, dos Santos SEB, Félix TM. Study ofIRF6and 8q24 region in non-syndromic oral clefts in the Brazilian population. Oral Dis 2016; 22:241-5. [DOI: 10.1111/odi.12432] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 11/24/2015] [Accepted: 12/17/2015] [Indexed: 02/03/2023]
Affiliation(s)
- LT de Souza
- Laboratório de Medicina Genômica - Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
- Programa de Pós-Graduação em Saúde da Criança e do Adolescente; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - TW Kowalski
- Programa de Pós-Graduação em Genética e Biologia Molecular; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - J Ferrari
- Laboratório de Medicina Genômica - Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
| | - IL Monlléo
- Serviço de Genética Clínica; Faculdade de Medicina; Hospital Universitário Professor Alberto Antunes; Universidade Federal de Alagoas; Maceió Brazil
| | - EM Ribeiro
- Hospital Infantil Albert Sabin; Fortaleza Brazil
| | - J de Souza
- Centro de Atendimento Integral ao Fissurado Lábio-palatal; Curitiba Brazil
| | - AC Fett-Conte
- Serviço de Genética; Faculdade de Medicina de São José do Rio Preto; São José do Rio Preto Brazil
| | - TK de Araujo
- Departamento de Genética Médica; Faculdade de Ciências Médicas; Universidade de Campinas; Campinas Brazil
| | - VL Gil-da-Silva-Lopes
- Departamento de Genética Médica; Faculdade de Ciências Médicas; Universidade de Campinas; Campinas Brazil
| | - ÂKC Ribeiro-dos-Santos
- Laboratório de Genética Humana e Médica; Instituto de Ciências Biológicas; Universidade Federal do Pará; Belém Brazil
| | - SEB dos Santos
- Laboratório de Genética Humana e Médica; Instituto de Ciências Biológicas; Universidade Federal do Pará; Belém Brazil
| | - TM Félix
- Laboratório de Medicina Genômica - Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
- Programa de Pós-Graduação em Saúde da Criança e do Adolescente; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
- Serviço de Genética Médica; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
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Souza LT, Kowalski TW, Collares MVM, Félix TM. MSX1 gene and nonsyndromic oral clefts in a Southern Brazilian population. Braz J Med Biol Res 2013; 46:555-8. [PMID: 23903689 PMCID: PMC3859340 DOI: 10.1590/1414-431x20133054] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 05/02/2013] [Indexed: 11/22/2022] Open
Abstract
Nonsyndromic oral clefts (NSOC) are the most common craniofacial birth defects in
humans. The etiology of NSOC is complex, involving both genetic and
environmental factors. Several genes that play a role in cellular proliferation,
differentiation, and apoptosis have been associated with clefting. For example,
variations in the homeobox gene family member MSX1, including a
CA repeat located within its single intron, may play a role in clefting. The aim
of this study was to investigate the association between MSX1
CA repeat polymorphism and NSOC in a Southern Brazilian population using a
case-parent triad design. We studied 182 nuclear families with NSOC recruited
from the Hospital de Clínicas de Porto Alegre in Southern Brazil. The
polymorphic region was amplified by the polymerase chain reaction and analyzed
by using an automated sequencer. Among the 182 families studied, four different
alleles were observed, at frequencies of 0.057 (175 bp), 0.169 (173 bp), 0.096
(171 bp) and 0.67 (169 bp). A transmission disequilibrium test with a
family-based association test (FBAT) software program was used for analysis.
FBAT analysis showed overtransmission of the 169 bp allele in NSOC (P=0.0005).
These results suggest that the CA repeat polymorphism of the
MSX1 gene may play a role in risk of NSOC in populations
from Southern Brazil.
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Affiliation(s)
- L T Souza
- Laborato´ rio de Medicina Genoˆ mica, Centro de Pesquisa Experimental, Hospital de Clinicas de Porto Alegre, Porto Alegre, RS, Brasil
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Di Nunzio F, Félix T, Arhel N, Nisole S, Charneau P, Beignon AS. HIV-derived vectors for therapy and vaccination against HIV. Vaccine 2012; 30:2499-509. [DOI: 10.1016/j.vaccine.2012.01.089] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 01/26/2012] [Accepted: 01/31/2012] [Indexed: 11/29/2022]
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Brustolin S, Giugliani R, Félix TM. Genetics of homocysteine metabolism and associated disorders. Braz J Med Biol Res 2009; 43:1-7. [PMID: 19967264 DOI: 10.1590/s0100-879x2009007500021] [Citation(s) in RCA: 124] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2009] [Accepted: 11/26/2009] [Indexed: 11/22/2022] Open
Abstract
Homocysteine is a sulfur-containing amino acid derived from the metabolism of methionine, an essential amino acid, and is metabolized by one of two pathways: remethylation or transsulfuration. Abnormalities of these pathways lead to hyperhomocysteinemia. Hyperhomocysteinemia is observed in approximately 5% of the general population and is associated with an increased risk for many disorders, including vascular and neurodegenerative diseases, autoimmune disorders, birth defects, diabetes, renal disease, osteoporosis, neuropsychiatric disorders, and cancer. We review here the correlation between homocysteine metabolism and the disorders described above with genetic variants on genes coding for enzymes of homocysteine metabolism relevant to clinical practice, especially common variants of the MTHFR gene, 677C>T and 1298A>C. We also discuss the management of hyperhomocysteinemia with folic acid supplementation and fortification of folic acid and the impact of a decrease in the prevalence of congenital anomalies and a decline in the incidence of stroke mortality.
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Affiliation(s)
- S Brustolin
- Serviço de Genética Médica, Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brasil
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Brandalize APC, Bandinelli E, Borba JB, Félix TM, Roisenberg I, Schüler-Faccini L. Polymorphisms in genes MTHFR, MTR and MTRR are not risk factors for cleft lip/palate in South Brazil. Braz J Med Biol Res 2007; 40:787-91. [PMID: 17581676 DOI: 10.1590/s0100-879x2006005000112] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2006] [Accepted: 03/26/2007] [Indexed: 12/22/2022] Open
Abstract
Non-syndromic cleft lip and palate (CL/P) occurs due to interaction between genetic and environmental factors. Abnormalities in homocysteine metabolism may play a role in its etiology due to polymorphisms in genes involved in this pathway. Because of the involvement of MTHFR, MTR and MTRR genes with folate metabolism and the evidence that maternal use of folic acid in early pregnancy reduces the risk for CL/P, we evaluated the influence of their polymorphisms on the etiology of CL/P through a case-control study. The analyses involved 114 non-syndromic phenotypically white children with clefts (case) and 110 mothers, and 100 non-affected (control) children and their mothers. The polymorphisms 677C>T of MTHFR, 2756A>G of MTR, and 66A>G of MTRR genes were analyzed by PCR-RFLP. Allelic frequencies did not differ from other studies conducted on white populations for MTHFR 677T allele (0.35) and for MTR 2756G allele (0.17), but MTRR 66G allele frequency (0.35) was lower than observed elsewhere. The genotypic distribution of the 677C>T polymorphisms under study did not show significant differences between CL/P patients, their mothers and controls. These results suggest that the alterations of folate metabolism related to these polymorphisms are not involved in clefting in the population under study.
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Affiliation(s)
- A P C Brandalize
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil
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Félix TM, Leite JC, Maluf SW, Coelho JC. A genetic diagnostic survey in a population of 202 mentally retarded institutionalized patients in the south of Brazil. Clin Genet 1998; 54:219-23. [PMID: 9788725 DOI: 10.1111/j.1399-0004.1998.tb04288.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [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: 11/29/2022]
Abstract
The Associação dos Pais e Amigos dos Excepcionais (APAE) is an institution for mentally retarded patients located at Caxias do Sul in the south of Brazil. A genetic diagnostic survey of 202 individuals from this institution is presented. The patients had a male:female ratio of 1.3:1 and their ages varied from 1 month to 47 years with a mean of 5.5 years. Using personal and family data, careful clinical examination and laboratory investigation, the authors established a definitive diagnosis in 132 patients (65.34%). A constitutional disorder was present in 111 patients (54.95%). Down's syndrome patients represented 32.15%, while 1.98% had other chromosomal anomalies. In 25 patients (12.37%) a disorder of Mendelian inheritance was diagnosed. In 8 patients (3.96%) a multiple congenital anomalies/mental retardation (MCA/MR) syndrome was recorded. Eight patients (3.96%) had a central nervous system (CNS) malformation. An acquired condition was observed in 21 patients (10.39%), including pre- or post-natal infections. In the remaining 70 patients (34.65%) a conclusive diagnosis was not possible.
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Affiliation(s)
- T M Félix
- Servico de Genética Médica, Hospital de Clínicas de Porto Alegre, Brazil.
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Abstract
Three families with the fragile X syndrome were studied with the aim to establish the most frequent clinical signs in the affected individuals and heterozygous women. The clinical evaluation, IQ level measurements and cytogenetic studies were performed in 40 subjects, 20 males and 20 females. The fragile X diagnosis was confirmed in all the male individuals with mental retardation. In the postpubertal subjects the most frequent clinical signs were inner canthal distance < 3.5 cm, macro-orchidism, long and narrow face and high arched palate while in the prepubertal subjects the behavioral characteristics as hyperactivity and poor eye contact were the most frequent and were observed in all patients. Twenty six percent of the heterozygous women presented with mental retardation and showed clinical signs rather than behavioral ones. All male individuals with mental retardation were observed as having fragile X [fra(X)] in lymphocytes culture. Sixty three percent of women showed fra(X). There was a positive correlation between the frequency of fra(X) and the clinical characteristics. We emphasize the importance of the clinical evaluation in the study of familial mental retardation and in the screening of isolated cases with suspect of having the fragile X syndrome.
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Affiliation(s)
- T M Félix
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Brasil.
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Ashton-Prolla P, Félix TM. Say syndrome: a new case with cystic renal dysplasia in discordant monozygotic twins. Am J Med Genet 1997; 70:353-6. [PMID: 9182773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Say syndrome is a rare condition characterized by cleft palate, short stature, and microcephaly. Abu-Libdeh et al. [1993: Am J Med Genet 45:358-360] described a case with cystic renal dysplasia. We describe monozygotic twins discordant for the syndrome with kidney dysplasia. A postzygotic mutation is proposed as the cause of this autosomal dominant syndrome in this case.
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Affiliation(s)
- P Ashton-Prolla
- Medical Genetics Unit, Hospital de Clínicas de Porto Alegre, Brazil
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Sarrat P, Bouscarle B, Félix T, Acquaviva PC, Guerra L, Kaphan G, Chevrot L. [Comparative study of scintigraphy, x-ray computed tomography and magnetic resonance imaging in the diagnosis of osteonecrosis of the hip and algodystrophy]. J Radiol 1985; 66:779-87. [PMID: 3831353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Effectiveness of modern imaging techniques were compared when used for diagnosis of the painful hip in adults, particularly the distinction between aseptic osteonecrosis and decalcifying osteodystrophy. Although a small number of patients were studied (5 cases of osteonecrosis and 5 of decalcification) the series was homogeneous (same investigator for each technique and identical equipment for each patient), and the different methods of investigation (conventional radiology, scintigraphy computed scanography CE 10,000 and 0.15 resistive NMR imaging) could be validly compared. NMR images were recorded in only 5 patients but evaluation involved findings during use of this method of hip investigation over a period of 8 months. Results of comparison of the different imaging methods in osteonecrosis and osteodystrophy of hip showed conventional radiology to be much less effective for diagnosis. Conventional bone scintigraphy appeared to provide a good diagnostic approach, while C.T. images appeared to be as effective or even more specific than scintigraphy for differential diagnosis of the two affections. The only uncertainty is based on the radiologic latency in early stage disease, probably able to be filled by a densitometry. The use of NMR imaging appears to be promising, since it provides data as early as scintigraphy and as specific as scanography, particularly in view of apparent discrimination between osteonecrosis and osteodystrophy of the hip with respect to measurement of relaxation parameters.
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