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1.
Article in Chinese | WPRIM | ID: wpr-888381

ABSTRACT

OBJECTIVE@#To identify the pathogenic variants of 4 patients with hemolytic anemia of unknown cause.@*METHODS@#Peripheral blood samples of the patients and their family members were collected to extract DNA. The coding region and splice region in all exons of gene of erythrocyte related diseases were analyzed by using target sequence capture and high-throughput sequencing technology. Suspected pathogenic variants were verified by PCR combined Sanger sequencing technology.@*RESULTS@#Each of the probands was detected two compound heterozygous variants, and CDA II was diagnosed. Six variants were detected in the 4 probands, four variants were reported and the other two were first reported.@*CONCLUSION@#By high-throughput sequencing, gene variant of CDA II be analyzed fast and accurately. It is an effective supplement to convenional diagnostic methods. Furthermore, the novel variant sites have enriched the variant database of the SEC23B gene.


Subject(s)
Anemia, Dyserythropoietic, Congenital/genetics , Exons/genetics , High-Throughput Nucleotide Sequencing , Humans , Mutation , Vesicular Transport Proteins/genetics
2.
Article in Chinese | WPRIM | ID: wpr-922011

ABSTRACT

OBJECTIVE@#To explore the genetic basis for a child with 46,XY disorders of sex development (DSD) and explore its genotype-phenotype correlation.@*METHODS@#The child was subjected to whole exome sequencing (WES), and exons 1 to 7 of NR5A1 were subjected to multiplex ligation-dependent probe amplification (MLPA) analysis.@*RESULTS@#The patient presented with rudimentary vulva of a female with Tanner stage 1. B-mode ultrasonography has detected ovary and uterus. The child was found to have a chromosome karyotype of 46,XY. WES revealed that the patient has harbored heterozygous deletion of exon 5 of the NR5A1 gene, which was a novel pathogenic variant inherited from the mother. No abnormality was found in the father.@*CONCLUSION@#The main symptoms of 46,XY DSD children are insufficient external genitalia masculinization, for which variants of the NR5A1 gene are an important cause. WES has improved the detection rate of genetic variants and provided a solid basis for genetic counseling of the affected families.


Subject(s)
Child , Disorder of Sex Development, 46,XY/genetics , Disorders of Sex Development/genetics , Exons/genetics , Female , Genetic Testing , Heterozygote , Humans , Mutation , Steroidogenic Factor 1/genetics
3.
Article in Chinese | WPRIM | ID: wpr-879623

ABSTRACT

OBJECTIVE@#To explore the genetic basis for a pedigree affected with hereditary multiple osteochondroma (HMO).@*METHODS@#Peripheral blood samples were collected from the proband and members of his pedigree with informed consent. Following extraction of genomic DNA, all coding exons and flanking intronic sequences (-10 bp) of the EXT1 and EXT2 genes were subjected to targeted capture and next generation sequencing (NGS). Suspected variant was verified by Sanger sequencing.@*RESULTS@#A heterozygous nonsense variant (c.1911C>A) was found in exon 10 of the EXT1 gene in the proband and his affected father but not in a healthy sister and normal controls. The variant was classified as a pathogenic based on the guidelines of the American College of Medical Genetics and Genomics (PVS1+PM2+PP1). Bioinformatic analysis predicted that the c.1911C>A variant may be disease-causing via nonsense-mediated mRNA decay and anomalous splicing.@*CONCLUSION@#The c.1911C>A variant probably underlay the disease in this pedigree. Discovery of this variant enriched the variant spectrum of HMO.


Subject(s)
Codon, Nonsense , Exons/genetics , Exostoses, Multiple Hereditary/genetics , Heterozygote , Humans , Pedigree
4.
Article in Chinese | WPRIM | ID: wpr-879595

ABSTRACT

OBJECTIVE@#To summarize the result of genetic testing and therapeutic prospect of 2042 unrelated Chinese pedigrees affected with Duchenne/Becker muscular dystrophy (DMD/BMD) from a single center from 2005 to 2019.@*METHODS@#Peripheral blood samples of the pedigrees were collected for the detection of DMD gene variants with combined multiple ligation-dependent probe amplification (MLPA), next generation sequencing (NGS) and Sanger sequencing.@*RESULTS@#DMD and BMD have respectively accounted for 78.60% and 21.40% of the pedigrees, which included 33 female probands. Variants of the DMD gene were detected in 1986 pedigrees (97.26%). Large deletions, duplications and small-scale mutations have respectively accounted for 71.85%, 8.76% and 19.39%. Common deletions and duplications have included deletion of exons 45-50 and duplications of exon 2, while no hot spot was found with small-scale mutations. For 1595 pedigrees affected with DMD, 935 (58.62%) were hereditary and 660 (41.38%) were de novo in origin. 34.28% (700/2042) of the patients had symptoms which could be relieved by gene therapy.@*CONCLUSION@#This has been the largest single-center study of DMD pedigrees, which has attained definite diagnosis in 97.26% of the patients. The results have enabled genetic counseling and prenatal diagnosis for the affected families upon their subsequent pregnancies, enriched the spectrum of DMD gene variants, as well as facilitated study of the mechanism of DMD gene mutations and exploration of clinical treatment.


Subject(s)
China , Dystrophin/genetics , Exons/genetics , Female , Gene Deletion , Genetic Testing , Humans , Muscular Dystrophy, Duchenne/therapy , Mutation , Pedigree , Pregnancy
5.
Article in Chinese | WPRIM | ID: wpr-879586

ABSTRACT

OBJECTIVE@#To explore the genetic basis for a patient featuring Rotor syndrome.@*METHODS@#Clinical data of the patient was collected. Whole exome sequencing (WES) based on high-throughput sequencing technology was carried out. Long-interspersed element-1 (LINE-1) insertion in intron 5 of the SLCO1B3 gene was detected by using tri-primer single tube PCR.@*RESULTS@#WES revealed that the patient has carried homozygous c.1738C>T nonsense variants of the SLCO1B1 gene. He was also found to harbor a homozygous insertion of LINE-1 in intron 5 of the SLCO1B3 gene, which has caused skipping of exon 5 or exons 5 to 7 and introduced a stop codon in the SLCO1B3 transcript.@*CONCLUSION@#The homozygous c.1738C>T variant of the SLCO1B1 gene and homozygous insertion of LINE-1 in intron 5 of the SLCO1B3 gene probably underlay the Rotor syndrome in this patient.


Subject(s)
Exons/genetics , Homozygote , Humans , Hyperbilirubinemia, Hereditary , Introns/genetics , Liver-Specific Organic Anion Transporter 1 , Male , Whole Exome Sequencing
6.
Article in Chinese | WPRIM | ID: wpr-879571

ABSTRACT

OBJECTIVE@#To explore the molecular basis for an individual with Bw subtype.@*METHODS@#Routine serological reactions were used to determine the surface antigens of erythrocytes and antibodies in serum. PCR-sequence-based typing (PCR-SBT) was used to analyze the coding regions of the ABO gene and erythroid-specific regulatory element in its intron 1. Amplicons for exons 5 to 7 containing the variant site were subjected to TA cloning for the isolation of the haploid and verification of the sequence. The 3D structure of mutant protein was predicted with Pymol software. Changes of amino acid residues and structural stability were also analyzed.@*RESULTS@#Serological assay showed that the individual had weakened B antigen and anti-B antibody in his serum. His genotype was determined as ABO*B.01/ABO*O.01.01. Sequencing of the entire coding region of the ABO gene identified an additional heterozygous c.734C/T variant. No variant was found in the erythroid-specific regulatory element of intron 1. Haploid cloning and isolation has obtained an ABO*O.01.01 allele and a ABO*B.01 allele containing a c.734T variant, which has led to substitution of Thr by Ile at position 245 in the functional center of glycosyltransferase. Based on the 3D structure of the protein, the residues binding with the mutation were unchanged, but the bonding distance between the hydrogens was changed with the amino acid substitution. Meanwhile, the connections with water molecules were increased.@*CONCLUSION@#The c.734C>T variant of the GTB gene can lead to an amino acid substitution in the functional center of the enzyme, which in turn may affect the stability of glycosyltransferase B protein and reduceits enzymatic activity.


Subject(s)
ABO Blood-Group System/genetics , Alleles , Exons/genetics , Genotype , Glycosyltransferases/genetics , Humans , Male , Phenotype
7.
Article in Chinese | WPRIM | ID: wpr-879562

ABSTRACT

OBJECTIVE@#To analyze the clinical phenotype and genetic basis for a Chinese pedigree affected with coagulation factor XI (FXI) deficiency.@*METHODS@#Activated partial thromboplastin time (APTT) and other blood coagulation factors, and activities of FXI:C and other relevant coagulation factors for a large Chinese pedigree including 6 patients from 3 generations were determined on a Stago automatic coagulometer. The FXI:Ag was determined with an ELISA method. All exons and flanking regions of the F11 gene were subjected to Sanger sequencing. ClustalX-2.1-win software was used to analyze the conservation of amino acids. Pathogenicity of the variants was predicted with online bioinformatics software including Mutation Taster and Swiss-Pdb Viewer.@*RESULTS@#The APTT of the proband was prolonged to 94.2 s. The FXI:C and FXI:Ag were decreased to 1% and 1.3%, respectively. The APTT of her father, mother, son and daughter was 42.1 s, 43.0 s, 42.5 s and 41.0 s, respectively. The FXI:C and FXI:Ag of them were almost halved compared with the normal values. The APTT, FXI:C and FXI:Ag of her husband were all normal. Genetic testing revealed that the proband has carried a heterozygous missense c.1103G>A (p.Gly350Glu) variant in exon 10 and a heterozygous missense c.1556G>A (p.Trp501stop) variant in exon 13 of the F11 gene. The father and daughter were heterozygous for the c.1103G>A variant, whilst the mother and son were heterozygous for the c.1556G>A variant. Both Gly350 and Trp501 are highly conserved among homologous species, and both variants were predicted to be "disease causing" by Mutation Taster. Protein modeling indicated there are two hydrogen bonds between Gly350 and Phe312 in the wild-type, while the p.Gly350Glu variant may add a hydrogen bond to Glu and Tyr351 and create steric resistance between the two, both may affect the structure and stability of protein.@*CONCLUSION@#The c.1103G>A and c.1556G>A compound heterozygous variants probably underlay the pathogenesis of congenital FXI deficiency in this pedigree.


Subject(s)
Exons/genetics , Factor XI/genetics , Factor XI Deficiency/genetics , Female , Heterozygote , Humans , Male , Mutation , Pedigree
8.
Article in Chinese | WPRIM | ID: wpr-879528

ABSTRACT

OBJECTIVE@#To detect variant of the CD40L gene and infection of Jamestown Canyon virus (JCV) in a 7-year-and-9-month-old boy with co-commitment progressive multifocal leukoencephalopathy (PML) and X-linked hyper IgM syndrome (XHIGM).@*METHODS@#Peripheral blood samples of the child and his parents were collected for the extraction of genomic DNA. The 5 exons and exon/intronic boundaries of the CD40L gene were subjected to PCR amplification and sequencing. Suspected variants were analyzed by using bioinformatic software. The JCV gene was amplified from genomic DNA by nested PCR and sequenced.@*RESULTS@#The child was found to harbor a hemizygous c.506 A>C (p.Y169S) missense variant in exon 5 of the CD40L gene. The variant may affect the TNFH domain of the CD40L protein and result in structural instability and loss of hydrophobic interaction between CD40L and CD40. As predicted by PolyPhen2 and SIFT software, the variant was probably damaging (score = 1.00) and deleterious (score= -8.868). His mother was found to be a heterozygous carrier, while the same variant was not found in his father. Gel electrophoresis of the nested PCR product revealed presence of target JCV band, which was confirmed to be 99% identical with the JCV gene by sequencing.@*CONCLUSION@#The patient was diagnosed with co-commitment XHIGM and PML based on the testing of the CD40L gene and JCV infection.


Subject(s)
Adult , CD40 Ligand/genetics , Child , Exons/genetics , Female , Humans , Hyper-IgM Immunodeficiency Syndrome, Type 1/genetics , Leukoencephalopathy, Progressive Multifocal/genetics , Male , Mutation, Missense , Polymerase Chain Reaction
9.
Article in Chinese | WPRIM | ID: wpr-879514

ABSTRACT

OBJECTIVE@#To explore the molecular basis for an individual suspected as AwB subtype through DNA sequencing.@*METHODS@#ABO serology was carried out with the standard tube method. To identify the ABO gene haplotype, the amplicons of exon 7 were cloned and sequenced.@*RESULTS@#Serological results showed that the forward typing was AwB and the reverse typing was B. Sequencing analysis revealed that the sample has contained an O01 allele in addition with c.297A>G, c.657C>T, c.796C>A, c.803G>C, c.930G>A variants as compared with the A101 allele.@*CONCLUSION@#Through sequencing analysis, the sample with an AwB subtype by serological testing was identified as a novel B(A) phenotype, which was unreported previously.


Subject(s)
ABO Blood-Group System/genetics , Alleles , Base Sequence , Exons/genetics , Humans , Mutation, Missense , Phenotype
10.
Rev. Soc. Bras. Med. Trop ; 54: e01452020, 2021. tab, graf
Article in English | ColecionaSUS, LILACS, ColecionaSUS, SES-SP | ID: biblio-1143891

ABSTRACT

Abstract INTRODUCTION: We evaluated the association between genetic polymorphisms in exon 1 (A/O alleles) and promoter regions at positions -550 (H/L variant, rs11003125) and -221 (X/Y variant, rs7096206) MBL2 and periportal fibrosis regression. METHODS: This was a retrospective cohort study involving 114 Brazilians infected with Schistosoma mansoni, who were subjected to follow-up for three years after specific treatment for schistosomiasis to estimate the probability of periportal fibrosis regression. RESULTS: A risk association was observed between polymorphism at the exon 1 MBL2 and periportal fibrosis regression. CONCLUSIONS: This study suggests that the polymorphism of exon 1 MBL2 may potentially be used to predict periportal fibrosis regression in this population.


Subject(s)
Humans , Animals , Schistosomiasis/genetics , Mannose-Binding Lectin/genetics , Polymorphism, Genetic , Brazil , Exons/genetics , Retrospective Studies , Genetic Predisposition to Disease , Polymorphism, Single Nucleotide , Genotype , Liver Cirrhosis/genetics
11.
An. bras. dermatol ; 93(6): 913-915, Nov.-Dec. 2018. tab, graf
Article in English | LILACS | ID: biblio-1038285

ABSTRACT

Abstract: The growth factor receptor c-kit (CD117) is expressed in immature T-cells and in some advanced forms of mycosis fungoides. c-kit gene mutation results in unrestricted neoplastic proliferation. We aimed to detect by PCR the most frequent exon mutations in seventeen plaque-stage MF patients, in their perilesional skin and in healthy skin donors. We secondarily evaluated CD117 expression by immunohistochemistry in plaque-stage and tumor-stage MF. We detected no mutation in c-kit gene and low CD117 expression was confirmed on atypical cells in one patient. Complete c-kit exon and intron sequences should be assessed and more sensitive sequencing method could be also applied.


Subject(s)
Humans , Male , Female , Aged , Exons/genetics , Mycosis Fungoides/genetics , Proto-Oncogene Proteins c-kit/genetics , Mutation/genetics , Immunohistochemistry , Case-Control Studies , Gene Expression , Polymerase Chain Reaction , Prospective Studies
12.
Einstein (Säo Paulo) ; 15(3): 269-272, July-Sept. 2017. tab
Article in English | LILACS | ID: biblio-891406

ABSTRACT

ABSTRACT Objective To verify the incidence of the G679A mutation in exon 2 of the gene inhibin alpha (INHA), in women with secondary amenorrhea and diagnosis of premature ovarian insufficiency, and in controls. Methods A 5mL sample of peripheral blood was collected from all study participants in an EDTA tube and was used for DNA extraction. For the patient group, 5mL of blood were also collected in a tube containing heparin for karyotype, and 5mL were collected in a dry tube for follicle stimulant hormone dosage. All patient and control samples were initially submitted to analysis of the G679A variant in exon 2 of the INHA gene by PCR-RFLP technique. Samples from patients with premature ovarian insufficiency after PCR-RFLP were submitted to Sanger sequencing of the encoding exons 2 and 3. Sequencing was performed on ABI 3500 GeneticAnalyzer equipment and the results were evaluated by SeqA and Variant Reporter software. Results Samples of 70 women with premature ovarian insufficiency and 97 fertile controls were evaluated. The G769A variant was found in only one patient in the Premature Ovarian Insufficiency Group and in no control, and it appears to be rare in Brazilian patients with premature ovarian insufficiency. This polymorphism was previously associated to premature ovarian insufficiency in several populations worldwide. Conclusion There is genetic heterogeneity regarding the INHA gene in different populations, and among the causes of premature ovarian insufficiency.


RESUMO Objetivo Verificar a incidência da mutação G679A no éxon 2 do gene da inibina alfa (INHA) em mulheres com amenorreia secundária e diagnóstico de insuficiência ovariana prematura e em controles. Métodos Uma amostra de 5mL de sangue periférico foi coletada de todos os participantes do estudo em tubo de EDTA e utilizada para a extração de DNA. Para o grupo de pacientes, foram coletados também 5mL de sangue em tubo contendo heparina para realização de cariótipo, e 5mL um tubo seco para dosagem de hormônio folículo-estimulante. As amostras de pacientes e controles foram inicialmente submetidas à análise da variante G679A no éxon 2 do gene INHA pela técnica de PCR-RFLP. As amostras de pacientes com insuficiência ovariana prematura após PCR-RFLP foram submetidas ao sequenciamento de Sanger dos éxons codantes 2 e 3. O sequenciamento foi realizado em equipamento ABI 3500 GeneticAnalyzer, e os resultados foram avaliados pelos programas SeqA and Variant Reporter. Resultados Foram avaliadas amostras de 70 mulheres com insuficiência ovariana prematura e de 97 controles férteis. A variante G769A foi encontrada em apenas uma paciente do Grupo Insuficiência Ovariana Prematura e em nenhum controle, e parece ser rara nas pacientes brasileiras com insuficiência ovariana prematura. Este polimorfismo foi previamente associado à insuficiência ovariana prematura em diversas populações no mundo. Conclusão O estudo evidenciou que há heterogeneidade genética quanto ao INHA em diferentes populações e entre as causas de insuficiência ovariana prematura.


Subject(s)
Humans , Female , Adult , Polymorphism, Genetic/genetics , Exons/genetics , Primary Ovarian Insufficiency/genetics , Inhibins/economics , Mutation/genetics , Polymorphism, Restriction Fragment Length , Genetic Markers/genetics , Case-Control Studies , Polymerase Chain Reaction
13.
Yonsei Medical Journal ; : 50-57, 2016.
Article in English | WPRIM | ID: wpr-186123

ABSTRACT

PURPOSE: Traditional chemotherapy is the main adjuvant therapy for the treatment of non-small cell lung cancer (NSCLC). However, the emergence of multi-drug resistance (MDR) has greatly restricted the curative effect of chemotherapy. Therefore, it is necessary to find a method to treat MDR NSCLC clinically. It is worth investigating whether NSCLCs that are resistant to traditional chemotherapy can be effectively treated with tyrosine kinase inhibitors targeting epidermal growth factor receptor (EGFR). MATERIALS AND METHODS: The expression of P-glycoprotein (P-gp) and lung resistance-related protein (LRP) was detected by immunohistochemistry, and mutations in EGFR (exons 19 and 21) and Kirsten rat sarcoma viral oncogene homolog (KRAS) (exon 2) were detected by high-resolution melting analysis (HRMA) of surgical NSCLC specimens from 127 patients who did not undergo traditional chemotherapy or radiotherapy. A Pearson chi-square test was performed to analyze the correlations between the expression of P-gp and LRP and mutations in EGFR and KRAS. RESULTS: The expression frequencies of P-gp and LRP were significantly higher in adenocarcinomas from non-smoking patients; the expression frequency of LRP was significantly higher in cancer tissue from female patients. The frequency of EGFR mutations was significantly higher in well to moderately differentiated adenocarcinomas from non-smoking female patients. The frequency of EGFR mutations in the cancers that expressed P-gp, LRP, or both P-gp and LRP was significantly higher than that in cancers that did not express P-gp or LRP. CONCLUSION: NSCLCs expressing P-gp/LRP bear the EGFR mutation in exon 19 or 21 easily.


Subject(s)
Aged , Aged, 80 and over , Carcinoma, Non-Small-Cell Lung/genetics , Exons/genetics , Female , Humans , Lung Neoplasms/genetics , Middle Aged , Mutation , ATP Binding Cassette Transporter, Subfamily B, Member 1/genetics , Protein Kinase Inhibitors/therapeutic use , Proto-Oncogene Proteins/genetics , Proto-Oncogene Proteins p21(ras) , ErbB Receptors/genetics , Treatment Outcome , Vault Ribonucleoprotein Particles/genetics , ras Proteins/genetics
14.
Article in English | WPRIM | ID: wpr-110761

ABSTRACT

Recent developments in genome editing technology using meganucleases demonstrate an efficient method of producing gene edited pigs. In this study, we examined the effectiveness of the transcription activator-like effector nuclease (TALEN) system in generating specific mutations on the pig genome. Specific TALEN was designed to induce a double-strand break on exon 9 of the porcine α1,3-galactosyltransferase (GGTA1) gene as it is the main cause of hyperacute rejection after xenotransplantation. Human decay-accelerating factor (hDAF) gene, which can produce a complement inhibitor to protect cells from complement attack after xenotransplantation, was also integrated into the genome simultaneously. Plasmids coding for the TALEN pair and hDAF gene were transfected into porcine cells by electroporation to disrupt the porcine GGTA1 gene and express hDAF. The transfected cells were then sorted using a biotin-labeled IB4 lectin attached to magnetic beads to obtain GGTA1 deficient cells. As a result, we established GGTA1 knockout (KO) cell lines with biallelic modification (35.0%) and GGTA1 KO cell lines expressing hDAF (13.0%). When these cells were used for somatic cell nuclear transfer, we successfully obtained live GGTA1 KO pigs expressing hDAF. Our results demonstrate that TALEN-mediated genome editing is efficient and can be successfully used to generate gene edited pigs.


Subject(s)
Animals , CD55 Antigens/genetics , Cell Line , DNA Breaks, Double-Stranded , Exons/genetics , Galactosyltransferases/genetics , Gene Editing/veterinary , Gene Knockout Techniques , Humans , Nuclear Transfer Techniques , Swine , Transcription Activator-Like Effector Nucleases/genetics
15.
J. pediatr. (Rio J.) ; 91(6): 583-589, nov.-dez. 2015. tab, graf
Article in English | LILACS | ID: lil-769799

ABSTRACT

Resumo Objetivo A acidose tubular renal distal (ATRd) é caracterizada por acidose metabólica devido à excreção renal de ácido prejudicada. O objetivo deste artigo é apresentar o diagnóstico genético de quatro crianças com ATRd com uso do sequenciamento total do exoma. Métodos Selecionamos duas famílias não relacionadas, quatro crianças com ATRd e seus pais, para fazer o sequenciamento total do exoma. A audição foi preservada em ambas as crianças da família um, porém em nenhuma criança da família dois, na qual um par de gêmeas teve perda auditiva severa. Fizemos o sequenciamento total do exoma em dois conjuntos de amostras e confirmamos os achados com o método de sequenciamento de Sanger. Resultados Duas mutações foram identificadas nos genes ATP6V0A4 e ATP6V1B1. Na família um, detectamos uma nova mutação no éxon 13 do gene ATP6V0A4 com uma alteração em um nucleotídeo único GAC → TAC (c.1232G>T) que causou substituição de ácido aspártico por tirosina na posição 411. Na família dois, detectamos uma mutação recorrente do homozigoto com inserção de um par de bases (c.1149_1155insC) no éxon 12 do gene ATP6V1B1. Conclusão Nossos resultados confirmam o valor do sequenciamento total do exoma para o estudo de nefropatias genéticas complexas e permitem a identificação de mutações novas e recorrentes. Adicionalmente, demonstramos claramente pela primeira vez a aplicação desse método molecular em doenças tubulares renais.


Abstract Objective Distal renal tubular acidosis (dRTA) is characterized by metabolic acidosis due to impaired renal acid excretion. The aim of this study was to demonstrate the genetic diagnosis of four children with dRTA through use of whole-exome sequencing. Methods Two unrelated families were selected; a total of four children with dRTA and their parents, in order to perform whole-exome sequencing. Hearing was preserved in both children from the first family, but not in the second, wherein a twin pair had severe deafness. Whole-exome sequencing was performed in two pooled samples and findings were confirmed with Sanger sequencing method. Results Two mutations were identified in the ATP6V0A4 and ATP6V1B1 genes. In the first family, a novel mutation in the exon 13 of the ATP6V0A4 gene with a single nucleotide change GAC → TAC (c.1232G>T) was found, which caused a substitution of aspartic acid to tyrosine in position 411. In the second family, a homozygous recurrent mutation with one base-pair insertion (c.1149_1155insC) in exon 12 of the ATP6V1B1 gene was detected. Conclusion These results confirm the value of whole-exome sequencing for the study of rare and complex genetic nephropathies, allowing the identification of novel and recurrent mutations. Furthermore, for the first time the application of this molecular method in renal tubular diseases has been clearly demonstrated.


Subject(s)
Adolescent , Child , Female , Humans , Infant , Male , Acidosis, Renal Tubular/diagnosis , Exons/genetics , Hearing Loss, Sensorineural/diagnosis , Vacuolar Proton-Translocating ATPases/genetics , Acidosis, Renal Tubular/genetics , DNA Mutational Analysis , Hearing Loss, Sensorineural/genetics , Severity of Illness Index
16.
J. pediatr. (Rio J.) ; 91(2): 130-135, Mar-Apr/2015. tab
Article in English | LILACS | ID: lil-745946

ABSTRACT

OBJECTIVES: To evaluate the possible effects of the introduction of the pneumococcal conjugate 10-valent vaccine schedule in the state of Parana on pneumococcal meningitis cases and to assess the distribution of serotypes among cases. METHOD: Cross-sectional study with retrospective data collection of cases of pneumococcal meningitis in the state of Paraná reported to Sistema de Informação de Agravos de Notificação (SINAN), from 1998 to 2011. A total of 1,339 cases of pneumococcal meningitis were analyzed; 1,205 cases from the pre-vaccine period (1998-2009) were compared to 134 cases from the post-vaccine period (2010-2011). Descriptive and comparative statistical analyses (chi-squared test and prevalence ratio) were performed using JMP 5.1.2 statistical software (JMP Statistical Discovery, North Carolina, USA) and EPI INFO 6 (Centers for Disease Control and Prevention, Georgia, EUA). RESULTS: There was a significant reduction in the mean rates of incidence and mortality in the general population. The analysis of cases in the pre- and post-vaccination periods in the age groups covered by vaccination (younger than 2 years) showed significant reductions in incidence rates (6.01 cases/100,000 to 2.49 cases/100,000 individuals) and mortality (1.85 cases/100,000 population to 0.47 cases/100,000 population), while the mean lethality rate did not change significantly. There was a significant reduction in cases whose serotypes are included in the vaccine (80.7% to 53.3%). CONCLUSION: Even after a short time of use, the 10-valent pneumococcal conjugate vaccine has already had a significant impact in reducing the incidence and mortality of meningitis cases among infants, as well as the reduction of cases whose serotypes are included in the vaccine. .


OBJETIVOS: Avaliar os possíveis efeitos da introdução da vacina pneumocócica conjugada 10 valente no calendário vacinal no Paraná sobre os casos de meningite pneumocócica; avaliar a distribuição dos sorotipos dentre os casos. MÉTODO: Estudo observacional, transversal, com coleta de dados retrospectiva dos casos de meningite pneumocócica no Estado do Paraná, notificados ao SINAN, no período de 1998 a 2011. Foram analisados 1339 casos de meningite pneumocócica e comparados os 1205 casos do período pré-vacina (1998 a 2009) com os 134 do período pós-vacina (2010 a 2011). A análise estatística descritiva e comparativa (teste qui-quadrado e razão de prevalência) foi realizada no software de estatística JMP 5.1.2 (JMP Statistical Discovery, Carolina do Norte, EUA) e no Programa EPI INFO 6. RESULTADOS: Observou-se redução significativa das taxas médias de incidência e mortalidade na população geral. A análise dos casos nos períodos pré e pós-vacina nas faixas etárias contempladas pela vacinação (menores de 2 anos) mostrou reduções significativas das taxas de incidência (6,01 casos/100.000 para 2,49 casos/100.000 habitantes), mortalidade (1,85 casos/100.000 habitantes para 0,47 casos/100.000 habitantes), enquanto que a letalidade média não apresentou variação significativa. Houve redução significativa dos casos cujos sorotipos estão incluídos na vacina (80,7% para 53,3%). CONCLUSÃO: Mesmo com um tempo reduzido de uso, a vacina pneumocócica conjugada 10 valente já apresentou um impacto relevante na diminuição dos coeficientes de incidência e mortalidade dos casos de meningite entre os lactentes, além de redução de casos cujos sorotipos estão incluídos na vacina. .


Subject(s)
Aged , Female , Humans , Male , Middle Aged , Genetic Predisposition to Disease/genetics , Polymorphism, Single Nucleotide/genetics , Sodium Channels/genetics , Torticollis/genetics , England , Exons/genetics , Gene Frequency , Genome-Wide Association Study , Genotype
17.
Bauru; s.n; 2015. 108 p. ilus, tab, graf.
Thesis in Portuguese | LILACS | ID: lil-773793

ABSTRACT

O propósito deste trabalho foi investigar a ocorrência de mutações e polimorfismos em genes candidatos aos defeitos na formação do esmalte dentário em indivíduos com fissura labiopalatina (FLP) transforame incisivo unilateral ou bilateral isolada e associar o genótipo-fenótipo dos indivíduos com FLP e malformação dentária (MD) nos dentes incisivos centrais superiores permanentes. Foram coletadas amostras de saliva de 165 indivíduos de 6 a 15 anos de idade, de ambos os sexos, divididos em 4 grupos de estudo: Grupo 1 - 46 indivíduos com FLP e MD; Grupo 2 - 34 indivíduos com FLP e sem MD; Grupo 3 - 34 indivíduos sem FLP e com MD; Grupo 4 - 51 indivíduos sem FLP e MD. Foi realizada a extração do DNA genômico das amostras de saliva, seguida da Reação em Cadeia da Polimerase, sequenciamento direto dos éxons 2, 3, 4, 5, 6 e 7 do gene AMELX e genotipagem dos SNPs rs3796703, rs3796704, rs3796705, rs7671281, rs2609428 e rs35951442 no gene ENAM. Para a análise estatística dos resultados foi utilizado o Teste Exato de Fisher e o Teste do Qui-quadrado de Pearson. Em relação ao sequenciamento direto do gene AMELX, mutações foram encontradas em 30,4% (n=14), 35,3% (n=12), 11,8% (n=4) e 13,7% (n=7) dos indivíduos dos Grupos 1, 2, 3 e 4, respectivamente. Trinta e sete mutações foram detectadas e distribuídas ao longo dos éxons 2 (1 mutação - 2,7%), 6 (30 mutações - 81,08%) e 7 (6 mutações - 16,22%) do gene AMELX. Houve um aumento significativo (p=0,003) na frequência de mutações nos indivíduos com FLP (Grupos 1 e 2 - 65,7%) em relação aos indivíduos sem FLP (Grupos 3 e 4 - 25,5%). Em relação às 30 mutações encontradas no éxon 6, 43,34% (n=13), 23,33% (n=7), 13,33% (n=4) e 20% (n=6) foram encontrados nos Grupos 1, 2, 3 e 4, respectivamente. A mutação silenciosa c.261C>T (rs2106416) foi detectada em 26 indivíduos distribuídos nos quatro grupos estudados, sendo significativamente mais encontrada (p=0,003) nos grupos com FLP (23,75%)...


The purpose of this study was to investigate the occurrence of mutations and polymorphisms (SNPs) in candidate genes to defects in the formation of enamel in individuals with cleft lip and palate (CLP) unilateral or bilateral incisive transforame isolated and associate genotype-phenotype of individuals with CLP and dental malformation (DM) in permanent teeth maxillary central incisors. For analysis of the proposed genes, saliva samples from 165 individuals from 6 to 15 years old, of both genders, were collected and divided into 4 groups: Group 1 - 46 individuals with CLP and DM; Group 2 - 34 individuals with CLP and without DM; Group 3 - 34 subjects without CLP and DM; Group 4 - 51 subjects without CLP and DM. Extraction of genomic DNA from saliva samples was performed, followed by Polymerase Chain Reaction, direct sequencing of 2, 3, 4, 5, 6 and 7 exons of AMELX gene and genotyping of SNPs rs3796703, rs3796704, rs3796705, rs7671281, rs2609428 and rs35951442 in the ENAM gene. For statistical analysis we used the Fisher's exact test and Pearson's chi-square test. Regarding direct sequencing of AMELX gene, mutations were found in 30.4% (n=14), 35.3% (n=12), 11.8% (n=4) and 13.7% (n=7) of individuals in Groups 1, 2, 3 and 4, respectively. Thirty-seven mutations were detected and distributed over the exons 2 (1 mutation - 2.7%), 6 (30 mutations - 81.08%) and 7 (6 mutations - 16.22%) of AMELX gene. There was a significant increase (p=0.003) in the frequency of mutations in individuals with CLP (Groups 1 and 2 - 65.7%) compared to subjects without CLP (Groups 3 and 4 - 25.5%). Regarding the 30 mutations found in exon 6, 43.34% (n=13), 23.33% (n=7), 13.33% (n=4) and 20% (n=6) were found in Groups 1, 2, 3 and 4, respectively. The c.261C>T silent mutation (rs2106416) was detected in 26 individuals distributed in all groups studied, and was significantly more found (p=0.003) in the groups with CLP (23.75%) compared to the groups without CLP (8.23%). In groups without...


Subject(s)
Humans , Male , Female , Child , Adolescent , Tooth Abnormalities/genetics , Cleft Lip/genetics , Cleft Palate/genetics , Polymorphism, Genetic/genetics , Amelogenin/genetics , Exons/genetics , Genetic Association Studies , Genetic Markers , Genotype , Mutation , Polymerase Chain Reaction , Saliva
18.
Bauru; s.n; 2015. 108 p. ilus, tab, graf.
Thesis in Portuguese | LILACS, BBO | ID: biblio-867341

ABSTRACT

O propósito deste trabalho foi investigar a ocorrência de mutações e polimorfismos em genes candidatos aos defeitos na formação do esmalte dentário em indivíduos com fissura labiopalatina (FLP) transforame incisivo unilateral ou bilateral isolada e associar o genótipo-fenótipo dos indivíduos com FLP e malformação dentária (MD) nos dentes incisivos centrais superiores permanentes. Foram coletadas amostras de saliva de 165 indivíduos de 6 a 15 anos de idade, de ambos os sexos, divididos em 4 grupos de estudo: Grupo 1 - 46 indivíduos com FLP e MD; Grupo 2 - 34 indivíduos com FLP e sem MD; Grupo 3 - 34 indivíduos sem FLP e com MD; Grupo 4 - 51 indivíduos sem FLP e MD. Foi realizada a extração do DNA genômico das amostras de saliva, seguida da Reação em Cadeia da Polimerase, sequenciamento direto dos éxons 2, 3, 4, 5, 6 e 7 do gene AMELX e genotipagem dos SNPs rs3796703, rs3796704, rs3796705, rs7671281, rs2609428 e rs35951442 no gene ENAM. Para a análise estatística dos resultados foi utilizado o Teste Exato de Fisher e o Teste do Qui-quadrado de Pearson. Em relação ao sequenciamento direto do gene AMELX, mutações foram encontradas em 30,4% (n=14), 35,3% (n=12), 11,8% (n=4) e 13,7% (n=7) dos indivíduos dos Grupos 1, 2, 3 e 4, respectivamente. Trinta e sete mutações foram detectadas e distribuídas ao longo dos éxons 2 (1 mutação - 2,7%), 6 (30 mutações - 81,08%) e 7 (6 mutações - 16,22%) do gene AMELX. Houve um aumento significativo (p=0,003) na frequência de mutações nos indivíduos com FLP (Grupos 1 e 2 - 65,7%) em relação aos indivíduos sem FLP (Grupos 3 e 4 - 25,5%). Em relação às 30 mutações encontradas no éxon 6, 43,34% (n=13), 23,33% (n=7), 13,33% (n=4) e 20% (n=6) foram encontrados nos Grupos 1, 2, 3 e 4, respectivamente. A mutação silenciosa c.261C>T (rs2106416) foi detectada em 26 indivíduos distribuídos nos quatro grupos estudados, sendo significativamente mais encontrada (p=0,003) nos grupos com FLP (23,75%), em comparação com os...


The purpose of this study was to investigate the occurrence of mutations and polymorphisms (SNPs) in candidate genes to defects in the formation of enamel in individuals with cleft lip and palate (CLP) unilateral or bilateral incisive transforame isolated and associate genotype-phenotype of individuals with CLP and dental malformation (DM) in permanent teeth maxillary central incisors. For analysis of the proposed genes, saliva samples from 165 individuals from 6 to 15 years old, of both genders, were collected and divided into 4 groups: Group 1 - 46 individuals with CLP and DM; Group 2 - 34 individuals with CLP and without DM; Group 3 - 34 subjects without CLP and DM; Group 4 - 51 subjects without CLP and DM. Extraction of genomic DNA from saliva samples was performed, followed by Polymerase Chain Reaction, direct sequencing of 2, 3, 4, 5, 6 and 7 exons of AMELX gene and genotyping of SNPs rs3796703, rs3796704, rs3796705, rs7671281, rs2609428 and rs35951442 in the ENAM gene. For statistical analysis we used the Fisher's exact test and Pearson's chi-square test. Regarding direct sequencing of AMELX gene, mutations were found in 30.4% (n=14), 35.3% (n=12), 11.8% (n=4) and 13.7% (n=7) of individuals in Groups 1, 2, 3 and 4, respectively. Thirty-seven mutations were detected and distributed over the exons 2 (1 mutation - 2.7%), 6 (30 mutations - 81.08%) and 7 (6 mutations - 16.22%) of AMELX gene. There was a significant increase (p=0.003) in the frequency of mutations in individuals with CLP (Groups 1 and 2 - 65.7%) compared to subjects without CLP (Groups 3 and 4 - 25.5%). Regarding the 30 mutations found in exon 6, 43.34% (n=13), 23.33% (n=7), 13.33% (n=4) and 20% (n=6) were found in Groups 1, 2, 3 and 4, respectively. The c.261C>T silent mutation (rs2106416) was detected in 26 individuals distributed in all groups studied, and was significantly more found (p=0.003) in the groups with CLP (23.75%) compared to the groups without CLP (8.23%). In groups without...


Subject(s)
Humans , Male , Female , Child , Adolescent , Tooth Abnormalities/genetics , Cleft Lip/genetics , Cleft Palate/genetics , Polymorphism, Genetic/genetics , Amelogenin/genetics , Exons/genetics , Genetic Association Studies , Genetic Markers , Genotype , Mutation , Polymerase Chain Reaction , Saliva
20.
Invest. clín ; 55(4): 365-370, dic. 2014. ilus
Article in English | LILACS | ID: lil-783090

ABSTRACT

Mucopolysaccharidoses are a group of lysosomal storage disorders caused by deficiency of enzymes catalyzing the degradation of glycosaminoglycans. Mucopoly-saccharidosis I can present a wide range of phenotypic characteristics with three major recognized clinical entities: Hurler and Scheie syndromes represent phenotypes at the severe and mild ends of the clinical spectrum, respectively, and the Hurler-Scheie syndrome is intermediate in phenotypic expression. These are caused by the deficiency or absence of α-L-iduronidase, essential to the metabolism of both dermatan and heparan sulfate, and it is encoded by the IDUA gene. We report the case of a 34-year-old male patient with enzymatic deficiency of α-L-iduronidase, accumulation of its substrate and a previously unreported mutation in the IDUA gene that developed a phenotype of Scheie syndrome.


Las mucopolisacaridosis son un grupo de trastornos de almacenamiento lisosomal causada por la deficiencia de enzimas que catalizan la degradación de glicosaminoglicanos. La mucopolisacaridosis tipo I puede presentar un amplio rango de características fenotípicas englobadas en tres entidades clínicas reconocidas: los síndromes de Hurler y Scheie representan los fenotipos graves y leves del espectro clínico, respectivamente y el síndrome de Hurler-Scheie intermedio en la expresión fenotípica. Estos son causados por la deficiencia o ausencia de la α-L-iduronidasa esencial para el metabolismo del dermatán y el heparán sulfato y es codificada por el gen IDUA. Se presenta el caso de paciente masculino de 34 años de edad con deficiencia enzimática de α-L-iduronidasa, acumulación de su sustrato y una mutación en el gen IDUA, no reportada previamente, que desarrolló un fenotipo del síndrome de Scheie.


Subject(s)
Adult , Humans , Male , Iduronidase/genetics , Mutation, Missense , Mucopolysaccharidosis I/genetics , Point Mutation , Amino Acid Substitution , Disease Progression , Dermatan Sulfate/urine , Exons/genetics , Glycosaminoglycans/metabolism , Heterozygote , Hand Deformities, Acquired/genetics , Introns/genetics , Magnetic Resonance Imaging , Mucopolysaccharidosis I/urine , Phenotype , Sequence Deletion , Symptom Assessment , Spinal Cord Compression/etiology , Spinal Cord Compression/pathology
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