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Ogawa T, Xue J, Guo L, Inoue-Arai MS, Vendramini-Pittoli S, Zechi-Ceide RM, Candido-Souza RM, Tonello C, Brandão MM, Ozawa TO, Peixoto AP, Ruiz DMCF, Nakashima T, Ikegawa S, Moriyama K, Kokitsu-Nakata NM. Identification of a de novo PUF60 variant associated with craniofacial microsomia. Am J Med Genet A 2024:e63631. [PMID: 38647383 DOI: 10.1002/ajmg.a.63631] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 03/12/2024] [Accepted: 04/03/2024] [Indexed: 04/25/2024]
Abstract
Craniofacial microsomia (CFM), also known as the oculo-auriculo-vertebral spectrum, is a congenital disorder characterized by hypoplasia of the mandible and external ear due to tissue malformations originating from the first and second branchial arches. However, distinguishing it from other syndromes of branchial arch abnormalities is difficult, and causal variants remain unidentified in many cases. In this report, we performed an exome sequencing analysis of a Brazilian family with CFM. The proband was a 12-month-old boy with clinical findings consistent with the diagnostic criteria for CFM, including unilateral mandibular hypoplasia, microtia, and external auditory canal abnormalities. A heterozygous de novo nonsense variant (c.713C>G, p.S238*) in PUF60 was identified, which was predicted to be pathogenic in silico. PUF60 has been reported as a causal gene in Verheij syndrome, but not in CFM. Although the boy showed craniofacial abnormalities and developmental delay that overlapped with Verheij syndrome, the facial asymmetry with unilateral hypoplasia of the mandible observed in this case did not match the previously reported phenotypes of PUF60 variants. Our findings expand the phenotypic range of PUF60 variants that cover CFM and Verheij syndrome.
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Affiliation(s)
- Takuya Ogawa
- Department of Maxillofacial Orthognathics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Jingyi Xue
- Laboratory for Bone and Joint Diseases, RIKEN Center for Integrative Medical Sciences, Tokyo, Japan
- Department of Pharmacology, School of Basic Medical Sciences, Beijing Key Laboratory of Metabolic Disturbance Related Cardiovascular Disease, Capital Medical University, Beijing, China
| | - Long Guo
- Laboratory for Bone and Joint Diseases, RIKEN Center for Integrative Medical Sciences, Tokyo, Japan
- Department of Laboratory Animal Science, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Maristela Sayuri Inoue-Arai
- Department of Maxillofacial Orthognathics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Siulan Vendramini-Pittoli
- Department of Clinical Genetics, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, São Paulo, Brazil
| | - Roseli Maria Zechi-Ceide
- Department of Clinical Genetics, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, São Paulo, Brazil
| | - Rosana Maria Candido-Souza
- Department of Clinical Genetics, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, São Paulo, Brazil
| | - Cristiano Tonello
- Department of Craniofacial Surgery, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, São Paulo, Brazil
| | - Michele Madeira Brandão
- Department of Craniofacial Surgery, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, São Paulo, Brazil
| | - Terumi Okada Ozawa
- Department of Orthodontics, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, São Paulo, Brazil
| | - Adriano Porto Peixoto
- Department of Orthodontics, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, São Paulo, Brazil
| | - Daniela Maria Cury Ferreira Ruiz
- Department Speech Therapy, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, São Paulo, Brazil
| | - Tomoki Nakashima
- Department of Cell Signaling, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Shiro Ikegawa
- Laboratory for Bone and Joint Diseases, RIKEN Center for Integrative Medical Sciences, Tokyo, Japan
| | - Keiji Moriyama
- Department of Maxillofacial Orthognathics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Nancy Mizue Kokitsu-Nakata
- Department of Clinical Genetics, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, São Paulo, Brazil
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Gomes LP, Ferraz BG, Brandão MM, Alonso N, Pittoli SV, Tonello C. Craniocervical Instability in Oculoauriculovertebral Spectrum. J Craniofac Surg 2023; 34:1283-1286. [PMID: 36658685 DOI: 10.1097/scs.0000000000009192] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 10/10/2022] [Indexed: 01/21/2023] Open
Abstract
INTRODUCTION The oculoauriculovertebral spectrum (OAVS) are anomalies of the first and second pharyngeal arches, causing craniofacial changes, principally facial asymmetry, as well as anomalies in the spine, that can be a cause of instability of the craniocervical junction - manipulation of an unstable spine can result in morbimortality. However, few studies have related OAVS to craniocervical instability. OBJECTIVES Correlate patients with OAVS through radiography with craniocervical instability and prediction of its occurrence. MATERIAL AND METHODS Through a radiographic study of the cervical spine, the assessment of vertebral malformations and the presence of craniocervical instability was performed and clinical assessment using the OMENS score as a phenotypic criteria for patients with OAVS, by a specialized multidisciplinary team. Student's t test, Kolmogorov-Smirnova, and χ 2 were performed. RESULTS Twenty-six patients with OAVS were evaluated, 7 (26.9%) had craniocervical instability, the OMENS score was 3 times higher, but without statistical significance. All patients with instability also had spinal malformations, and of those without craniocervical instability (19 patients), 57.8% had spinal malformations. Vertebral malformations had a similar incidence in those with and without instability, the most common being scoliosis. There was no statistical significance in the presence or absence of spinal malformations with the presence or absence of craniocervical instability. Extracraniofacial findings were found in all patients with instability; 71.4% of them were radial. CONCLUSIONS Patients with higher OMENS scores had more craniocervical instability but without statistical significance. It also did not show statistical relevance between the presence of malformations and craniocervical instability.
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Affiliation(s)
- Luiz Paulo Gomes
- Department of Craniofacial Surgery, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo (HRAC/USP), Bauru
| | - Beatriz Gonçalves Ferraz
- Department of Craniofacial Surgery, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo (HRAC/USP), Bauru
| | - Michele Madeira Brandão
- Department of Craniofacial Surgery, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo (HRAC/USP), Bauru
| | - Nivaldo Alonso
- Department of Plastic Surgery, University of São Paulo, São Paulo, Brazil
| | - Siulan Vendramini Pittoli
- Department of Craniofacial Surgery, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo (HRAC/USP), Bauru
| | - Cristiano Tonello
- Department of Craniofacial Surgery, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo (HRAC/USP), Bauru
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Gonçalves Ferraz B, Vendramini-Pittoli S, Gomes LP, Madeira Brandão M, Alonso N, Tonello C. Craniofacial Microsomia: New Updates in Spinal Anomalies. J Craniofac Surg 2023; 34:e398-e401. [PMID: 37126414 DOI: 10.1097/scs.0000000000009326] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Accepted: 02/19/2023] [Indexed: 05/02/2023] Open
Abstract
INTRODUCTION Craniofacial microsomia (CFM) involves anomalies of the first and second pharyngeal arches, mainly of the mandible, maxilla, ears, and vertebral spine. This study aimed to identify the frequency and morphology of spinal anomalies of individuals with clinical diagnoses of CFM. In addition, the correlation between spinal anomalies and craniofacial involvement was performed. MATERIALS AND METHODS This study was a retrospective review of individuals with a clinical diagnosis of craniofacial microsomia. The inclusion criteria were a clinical diagnosis of CFM with no overlap with any other syndromes of first and second pharyngeal arches and radiograph availability in the hospital's database. Prevalence and morphology of spinal anomalies were calculated and clinical details were recorded: types of spinal anomalies and correlations according to OMENS score. RESULTS The sample consisted of 46 individuals with a clinical diagnosis of CFM, 24 (52,2%) female and 22 (47,8%) male (1M:1F). Twenty-one (45,7%) had unilateral craniofacial involvement and 25 (54,3%), bilateral. Twenty-eight (60,9%) individuals presented spinal anomalies. Those with unaltered spinal morphology showed a slight preference toward OMENS scores under 5: 7 patients did, only one of which had spinal alterations (14,3%); 68,8% (22) in the group with scores 5 to 9 (n=32) and 71,4% (5) in the 10 to 15 group (n=7) did as well. DISCUSSION AND CONCLUSIONS Spinal anomalies in individuals with CFM are more common than usually reported in medical literature, mainly when associated with radial anomalies and correlate with statistical significance to facial features, mainly the OMENS score.
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Affiliation(s)
| | - Siulan Vendramini-Pittoli
- Division of Clinical Genetics, University of São Paulo (USP), Hospital for Rehabilitation of Craniofacial Anomalies
| | - Luiz Paulo Gomes
- University of São Paulo (USP), Hospital for Rehabilitation of Craniofacial Anomalies, Bauru
| | - Michele Madeira Brandão
- Division of Clinical Genetics, University of São Paulo (USP), Hospital for Rehabilitation of Craniofacial Anomalies
| | - Nivaldo Alonso
- University of São Paulo (USP), Hospital for Rehabilitation of Craniofacial Anomalies, Bauru
- University of São Paulo (USP), School of Medicine, São Paulo, São Paulo, Brazil
| | - Cristiano Tonello
- University of São Paulo (USP), Hospital for Rehabilitation of Craniofacial Anomalies, Bauru
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Tonello C, Brandão MM, Alonso N. Sinus pericranii-unusual anatomic obstacle to posterior decompression on an amniotic band sequence. Childs Nerv Syst 2021; 37:1369-1372. [PMID: 32705328 DOI: 10.1007/s00381-020-04816-y] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 07/13/2020] [Indexed: 10/23/2022]
Abstract
Abnormal venous drainage in patients with craniofacial anomalies is relativity uncommon. Sinus pericranii is a rare vascular malformation characterized by communication between intracranial dural sinuses and extracranial venous drainage systems. The association between sinus pericranii and amniotic band syndrome has not been described. We report on a 7-month-old girl diagnosed with amniotic band sequence who underwent posterior fossa decompression due to intracranial hypertension and Chiari malformation type I. The computed tomography and magnetic resonance identified the connection between the sagittal sinus and the scalp. During the operation, the presence of sinus pericranii was a complicating factor limiting the proper exposure because of the risk of bleeding. Patients with craniofacial anomalies and sinus pericranii present an increased risk of serious surgical complications and consequences from craniofacial surgery, especially from cranioplasty and posterior decompression. Special attention must be paid to abnormal venous drainage, and vascular imaging studies are sometimes required.
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Affiliation(s)
- Cristiano Tonello
- Craniofacial Unit of Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Rua Engenheiro Alpheu José Ribas Sampaio, 2-25 apto 64, Bauru, SP, 17012-631, Brazil.
| | - Michele Madeira Brandão
- Craniofacial Unit of Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Rua Engenheiro Alpheu José Ribas Sampaio, 2-25 apto 64, Bauru, SP, 17012-631, Brazil
| | - Nivaldo Alonso
- Faculty of Medicine, Craniofacial Surgery Department, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, São Paulo, Brazil
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Cota LG, Moreira PA, Brandão MM, Royo VA, Junior AFM, Menezes EV, Oliveira DA. Structure and genetic diversity of Anacardium humile (Anacardiaceae): a tropical shrub. Genet Mol Res 2017; 16:gmr-16-03-gmr.16039778. [PMID: 28973757 DOI: 10.4238/gmr16039778] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Anacardium humile Saint Hilaire is a tropical shrub native to the Cerrado biome. It is a fruiting species with biological, medicinal, and socioeconomic significance. Thus, knowing how the genetic variability of natural populations is organized allows for the establishment of strategies for conservation and the sustainable use of the species and its biome. Six microsatellite loci previously developed from Anacardium occidentale were used to investigate the spatial genetic structure and genetic diversity of eight natural A. humile populations based on analyses of 242 adult plants. The results obtained indicate that these populations show a high level of genetic diversity (expected heterozygosity = 0.710). The endogamy coefficient was positive and significant for most populations, with a mean of 0.142 (P = 0.001). The genetic differentiation between populations was low (θ = 0.075 and GST = 0.066) but significant (P = 0.0001). The genotypes of five of the eight populations were non-randomly distributed with clusters of related plants for which the coancestry values were positive and significant. These populations exhibited high and significant endogamy indices. The results obtained for A. humile populations show that genetic conservation programs should be implemented to maintain this species.
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Affiliation(s)
- L G Cota
- Laboratório de Bioprospecção e Recursos Genéticos, Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Campus Universitário Professor Darcy Ribeiro, , Brasil
| | - P A Moreira
- Departamento de Biologia, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Campus Morro do Cruzeiro, , Brasil
| | - M M Brandão
- Laboratório de Bioprospecção e Recursos Genéticos, Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Campus Universitário Professor Darcy Ribeiro, , Brasil
| | - V A Royo
- Laboratório de Bioprospecção e Recursos Genéticos, Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Campus Universitário Professor Darcy Ribeiro, , Brasil
| | - A F Melo Junior
- Laboratório de Bioprospecção e Recursos Genéticos, Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Campus Universitário Professor Darcy Ribeiro, , Brasil
| | - E V Menezes
- Laboratório de Bioprospecção e Recursos Genéticos, Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Campus Universitário Professor Darcy Ribeiro, , Brasil
| | - D A Oliveira
- Laboratório de Bioprospecção e Recursos Genéticos, Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Campus Universitário Professor Darcy Ribeiro, , Brasil
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Vieira FA, Sousa RF, Fajardo CG, Brandão MM. Increased relatedness among the neighboring plants from seedling to adult stages in carnaúba wax palm. Genet Mol Res 2016; 15:gmr-15-04-gmr.15049100. [PMID: 28002596 DOI: 10.4238/gmr15049100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The objective of this study was to assess the spatial genetic structure (SGS) at different life stages (cohorts) in a remnant population (N = 101) of Copernicia prunifera in the semiarid region of northeastern Brazil. Using seven inter-simple sequence repeat molecular markers, we were able to analyze 93 loci with 100% polymorphism. Seedlings had the highest level of genetic diversity (HE = 0.411, HO = 0.599), followed by juveniles (HE = 0.394, HO = 0.579) and adults (HE = 0.267, HO = 0.427). Based on analysis of molecular variance, the majority of genetic variations were observed to occur within the life stages (93.42%) rather than between the life stages (6.58%). We found a recent reduction in the population size (bottleneck) based on the number of loci with heterozygosity excess for the two models used (infinite allele = 92 and stepwise = 91). All the life stages showed significant SGS, with positive and significant kinship values. Sp values were 0.040 for seedlings, 0.093 for juveniles, 0.156 for adults, and 0.053 for the total population. We found an increase in SGS from the seedling to adult stages, indicating that the plants were from related adult progenitors. Data from this study can be used in designing effective management and conservation strategies for the species.
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Affiliation(s)
- F A Vieira
- Universidade Federal do Rio Grande do Norte, Macaíba, RN, Brasil
| | - R F Sousa
- Universidade Federal do Rio Grande do Norte, Macaíba, RN, Brasil
| | - C G Fajardo
- Universidade Federal do Rio Grande do Norte, Macaíba, RN, Brasil
| | - M M Brandão
- Universidade Estadual de Montes Claros, Montes Claros, MG, Brasil
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Neiva DS, Melo Júnior AF, Oliveira DA, Royo VA, Brandão MM, Menezes EV. Acrocomia emensis (Arecaceae) genetic structure and diversity using SSR molecular markers. Genet Mol Res 2016; 15:gmr7785. [PMID: 27050985 DOI: 10.4238/gmr.15017785] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Acrocomia emensis, popularly known as the creeping tucum, belongs to the family Arecaceae, and is an oilseed specie of the Brazilian Savannah. The expansion of agricultural activity has rapidly destroyed its natural habitat, leading to a decrease in its population size. Genetic studies can be used to investigate the genetic variability, and may assist with the charting future conservation strategies. In this study the genetic diversity and structure of 150 individuals sampled in three locations in Minas Gerais were analysed, based on the transferability of six microsatellite markers, previously developed for A. aculeata. The results indicate that the populations studied have low levels of genetic variability (Ho = 0.148) and high, positive and significant inbreeding coefficient, indicating an excess of homozygotes. The average heterozygosity within the population (Hs = 0.700) accounted for 95.03% of the total genetic diversity, indicating that there is greater variability within population than between them, consistent with low genetic differentiation between population (GST = 0.046). Bayesian analysis identified three distinct groups; however, populations shared large numbers of alleles, which can be explained by the reduced distance between populations. These results reveal the need to implement genetic conservation programs for the maintenance of this species and to prioritize population from Bonito and Brasília, which showed the lowest values of genetic diversity.
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Affiliation(s)
- D S Neiva
- Laboratório de Bioprospecção e Recursos Genéticos, Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Campus Universitário Professor Darcy Ribeiro, Montes Claros, MG, Brasil
| | - A F Melo Júnior
- Laboratório de Bioprospecção e Recursos Genéticos, Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Campus Universitário Professor Darcy Ribeiro, Montes Claros, MG, Brasil
| | - D A Oliveira
- Laboratório de Bioprospecção e Recursos Genéticos, Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Campus Universitário Professor Darcy Ribeiro, Montes Claros, MG, Brasil
| | - V A Royo
- Laboratório de Bioprospecção e Recursos Genéticos, Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Campus Universitário Professor Darcy Ribeiro, Montes Claros, MG, Brasil
| | - M M Brandão
- Laboratório de Bioprospecção e Recursos Genéticos, Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Campus Universitário Professor Darcy Ribeiro, Montes Claros, MG, Brasil
| | - E V Menezes
- Laboratório de Bioprospecção e Recursos Genéticos, Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Campus Universitário Professor Darcy Ribeiro, Montes Claros, MG, Brasil
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Germano RAS, Silva MV, Germano FAS, Brandão MM, Germano CS, Souza BLD, Kawai RM, Germano JE. Eyelid liquoric fistula secondary to orbital meningocele. Revista Brasileira de Oftalmologia 2015. [DOI: 10.5935/0034-7280.20150011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Ducati LG, Silva MV, Brandão MM, Romero FR, Zanini MA. Intradural lumbar disc herniation: report of five cases with literature review. Eur Spine J 2012; 22 Suppl 3:S404-8. [PMID: 23014741 DOI: 10.1007/s00586-012-2516-4] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 09/03/2012] [Accepted: 09/16/2012] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Intradural lumbar disc herniations are uncommon presentations of a relatively frequent pathology, representing less than 1% of all lumbar disc hernias. They show specific features concerning their clinical diagnosis, with a higher incidence of cauda equina syndrome, and their surgical treatment requires a transdural approach. METHODS In this article, we describe five cases of this pathology and review the literature as well as some considerations about the difficulties in the preoperative diagnostic issues and the surgical technique. CONCLUSION We concluded that for intradural disc herniations the diagnosis is mainly intraoperative, and the surgical technique has some special aspects.
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Affiliation(s)
- Luis Gustavo Ducati
- Department of Neurology and Psychiatry, Hospital das Clinicas da Faculdade de Medicina de Botucatu, University of State of São Paulo (UNESP), District of Rubião Junior, Botucatu, SP, CEP 18618-970, Brazil.
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Oliveira DA, Melo Júnior AF, Brandão MM, Rodrigues LA, Menezes EV, Ferreira PRB. Genetic diversity in populations of Acrocomia aculeata (Arecaceae) in the northern region of Minas Gerais, Brazil. Genet Mol Res 2012; 11:531-8. [PMID: 22535388 DOI: 10.4238/2012.march.8.1] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Macaúba (Acrocomia aculeata) is a palm of economic importance, widely distributed in natural forests from Mexico to Uruguay. We analyzed the genetic diversity of populations of macaúba (A. aculeata) in the northern region of the State of Minas Gerais, Brazil. Young leaves from 10 macaúba individuals encompassing 49 genotypes of macaúba were collected from Montes Claros, Itacambira, Brasília de Minas, Mirabela, and Grão Mogol. After extraction and amplification of samples, the amplified fragments were separated by electrophoresis. We found high levels of genetic diversity within the populations. Genetic diversity indices were high, except in the Itacambira and Mirabela populations. Results show that Mirabela and Itacambira populations can require conservation strategies because they present lower values of genetic diversity.
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Affiliation(s)
- D A Oliveira
- Laboratório de Bioprospecção e Recursos Genéticos, Programa de Pós-Graduação em Biotecnologia, Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Montes Claros, MG, Brasil.
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Brandão MM, Rêgo MAV, Pugliese L, Clarêncio J, Bastos CM, Ferreira J, Meyer R, Neves M, Freire SM. Phenotype analysis of lymphocytes of workers with chronic benzene poisoning. Immunol Lett 2005; 101:65-70. [PMID: 15913788 DOI: 10.1016/j.imlet.2005.04.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [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: 12/23/2004] [Revised: 04/08/2005] [Accepted: 04/11/2005] [Indexed: 10/25/2022]
Abstract
Lifetime exposure to benzene is associated to a variety of blood disorders, and except for the risk of cancer, almost nothing is known concerning health impairment in individuals who are no longer exposed. In Brazil, this exposure is one of the serious problems in workplaces, and many workers have been laid off their jobs due to this intoxication, particularly in the State of Bahia, the largest producer of benzene in Latin America, which is the area of this study. From a larger study to describe health effects and genetic polymorphisms among workers with chronic benzene poisoning (CBP), this previous specific investigation analyzes the association between CBP and the pattern of sub-populations of lymphocytes. The study was performed with a CBP group (n=24) and a control group with other occupational diseases (n=24); both were selected at the Workers Health Study Center in the State of Bahia, Brazil. Clinical and epidemiologic variables were collected from medical records and from a detailed questionnaire. The average age was similar in the two groups (51.1 and 50.7, respectively). Analyzing the mean proportions of the sub-populations of lymphocytes, statistically significant differences were found for T cytotoxic cells (TCD8) (27.9; 19.4; p=0.002) and T helper memory cell (CD4CD45RO) (31.2; 37.0; p=0.015), respectively, for the CBP group and control group. These results should be viewed with caution because of the small sample size, but they strengthen a previous impression that workers exposed to benzene have their immune system impaired, even in the long term, which may contribute to some disorders and carcinogenesis process. These workers must be strictly followed up in a medical surveillance program. Although this problem has been known for a long time, this is the first attempt to study these specific effects in Brazil.
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Affiliation(s)
- M M Brandão
- PPGIm-ICS-UFBA/FDC, Fundacao Bahiana para o Desenvolvimento das Ciencias, Rua Silveira Martins n.3386-Cabula, 41150100 Salvador, Brazil.
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Abstract
BACKGROUND AND OBJECTIVES Red blood cells (RBCs) from patients with sickle cell disease present reduced deformability. The aim of this study was to analyse the elasticity of stored RBCs from patients with the sickle cell trait (AS). MATERIALS AND METHODS The cell elasticity was studied, using laser optical tweezers, on storage days 1, 14, 21, 28 and 35. RESULTS The elasticity of RBC from AS units stored for 1, 14 and 21 days was significantly greater compared with that of control RBC cells stored for the same time-period. More than 30% of the cells from AS units stored for 28 or 35 days were very rigid and escaped from the optical trap. CONCLUSIONS RBCs became rigid during storage, suggesting that haemoglobin S might compromise the cell elasticity.
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Affiliation(s)
- M M Brandão
- Hemocentro Unicamp, State University of Campinas, Campinas, Brazil
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Brandão MM, Fontes A, Barjas-Castro ML, Barbosa LC, Costa FF, Cesar CL, Saad STO. Optical tweezers for measuring red blood cell elasticity: application to the study of drug response in sickle cell disease. Eur J Haematol 2003; 70:207-11. [PMID: 12656742 DOI: 10.1034/j.1600-0609.2003.00027.x] [Citation(s) in RCA: 179] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The deformability of erythrocytes is a critical determinant of blood flow in microcirculation. By capturing red blood cells (RBC) with optical tweezers and dragging them through a viscous fluid we were able to measure their overall elasticity. We measured, and compared, the RBC deformability of 15 homozygous patients (HbSS) including five patients taking hydroxyurea (HU) for at least 6 months (HbSS/HU), 10 subjects with sickle cell trait (HbAS) and 35 normal controls. Our results showed that the RBC deformability was significantly lower in haemoglobin S (HbS) subjects (HbSS and HbAS), except for HbSS/HU cells, whose deformability was similar to the normal controls. Our data showed that the laser optical tweezers technique is able to detect differences in HbS RBC from subjects taking HU, and to differentiate RBC from normal controls and HbAS, indicating that this is a very sensitive method and can be applied for detection of drug-response in sickle cell disease.
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Affiliation(s)
- M M Brandão
- Department of Internal Medicine and Haemocentre, State University of Campinas - UNICAMP, Campinas, São Paulo, Brazil
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14
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Abstract
BACKGROUND Gamma irradiation of RBCs results in the production of reactive oxygen capable of initiating the process of membrane lipid peroxidation and accelerates the leakage of potassium ions from RBCs, resulting in an increase of internal viscosity. STUDY DESIGN AND METHODS The elastic properties of irradiated and stored RBC units were studied using laser optical tweezers. The laser trapped the cell and the membrane elasticity was analyzed, measuring the cell deformation in six different drag velocities. Five RBC units were split into two portions. One portion received a gamma irradiation dose of 25 Gy, and the second one was used as a control and was not irradiated. All units were stored (4 degrees C), and the elasticity was examined on Days 1, 14, 21, and 28. RESULTS Elastic properties (mu) from irradiated RBCs stored for 21 and 28 days were significantly affected compared with control cells (21 days: control, 0.3 +/- 0.03 x 10(-3); irradiated, 3.5 +/- 1.3 x 10(-3) dyn/cm; p < 0.001; and 28 days: control, 0.5 +/- 0.09 x 10(-3); irradiated, 14 +/- 3.2 x 10(-3) dyn/cm; p < 0.001). CONCLUSION The sensitivity of the laser optical tweezers method showed that there is no significant change in elasticity over time for up to 14 days of storage, regardless of whether the unit was irradiated or not. However, beyond 21 days of storage, irradiated units demonstrate decreased elasticity.
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Affiliation(s)
- M L Barjas-Castro
- Hematology and Transfusion Center, State University of Campinas, São Paulo, Brazil.
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15
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Abstract
Significant activity of inducible nitric oxide synthase (iNOS) has been reported in tumour cells, including chronic lymphoid leukaemic cells. In this study, we analysed the expression of iNOS in 15 untreated patients with acute myeloid leukaemia (AML) and in 7 normal controls. Using flow cytometry and immunocytochemistry, we demonstrated that patients with AML had a high expression of iNOS when compared to controls. There was no correlation between the expression of iNOS and the expression of p53 and K, H, and N-ras mutation and expression, suggesting that the high expression of iNOS is independent of these proteins and could be the result of transcription factors expressed in AML.
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Affiliation(s)
- M M Brandão
- Department of Pharmacology, State University of Campinas, Unicamp, Campinas, Brazil
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16
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Almeida MF, Aguiar EA, Martorelli LA, Presotto D, Brandão MM, Pereira OA. [Humoral immune response of dogs to the inactivated suckling mouse brain vaccine used in anti-rabies campaigns in Brazil]. Rev Saude Publica 1997; 31:502-7. [PMID: 9629728 DOI: 10.1590/s0034-89101997000600009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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: 02/07/2023] Open
Abstract
INTRODUCTION An anti-rabies campaign is undertaken annually in Brazil with of the Fuenzalida & Palacios vaccine. The humoral immune response of dogs vaccinated during the campaigns was researched with the objective of evaluating whether the dogs presented a protective titer (0.5 UI/ml) 12 months after vaccination and how many of these achieved this titer 30 days after a buttressing vaccination. MATERIAL AND METHOD Three hundred and forty-one specimens of serum of dogs domicilied, 259 in the S. Paulo and 82 in the Paulinia counties, were analyzed utilizing the Rapid Fluorescence Focus Inhibition Test. The immune response was evaluated taking into consideration the nutritional state of the animal and the number of previous vaccinations. RESULTS The larger number of the dogs had not achieved the 0.5 UI/ml titer after 12 months, independently of the nutritional state and the response to the buttressing vaccination was more apparent in dogs with two or more previous vaccinations. DISCUSSION The cut off of 0.5 UI/ml as protective titer in dogs and the influence of the nutritional state and health conditions of the animals as responsible for humoral immune response are discussed.
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Affiliation(s)
- M F Almeida
- Centro de Controle de Zoonoses da Prefeitura do Município de São Paulo, Brasil
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17
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Chieffi PP, Peres BA, de Mello EO, Kanamura H, Brandão MM. Persistence of specific antibody response in different experimental infections of mice with Toxocara canis larvae. Rev Inst Med Trop Sao Paulo 1995; 37:187-90. [PMID: 8525261 DOI: 10.1590/s0036-46651995000300001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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: 01/31/2023] Open
Abstract
Anti-Toxocara antibody production and persistence were studied in experimental infections of BALB/c mice, according to three different schedules: Group I (GI)-25 mice infected with 200 T. canis eggs in a single dose; Group II (GII) 25 mice infected with 150 T. canis eggs given in three occasions, 50 in the 1st, 50 in the 5th and 50 in the 8th days; Group III (GIII)-25 mice also infected with 150 T. canis eggs, in three 50 eggs portions given in the 1st, 14th and 28th days. A 15 mice control group (GIV) was maintained without infection. In the 30th, 50th, 60th, 75th, 105th and 180th post-infection days three mice of the GI, GII and GIII groups and two mice of the control group had been sacrificed and exsanguinated for sera obtention. In the 360th day the remainder mice of the four groups were, in the same way, killed and processed. The obtained sera were searched for the presence of anti-Toxocara antibodies by an ELISA technique, using T. canis larvae excretion-secretion antigen. In the GI and GII, but not in the GIII, anti-Toxocara antibodies had been found, at least, up to the 180th post-infection day. The GIII only showed anti-Toxocara antibodies, at significant level, in the 30th post-infection day.
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Affiliation(s)
- P P Chieffi
- Instituo de Medicina Tropical, FMUSP, São Paulo, Brasil
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