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1.
An. bras. dermatol ; 94(3): 287-292, May-June 2019. tab
Article in English | LILACS (Americas), SES-SP, SESSP-ILSLPROD, SES-SP, SESSP-ILSLACERVO, SES-SP | ID: biblio-1011110

ABSTRACT

Abstract: Background: Renal transplant recipients are submitted to immunosuppression to avoid graft rejection, which makes them susceptible to various conditions. Furthermore, these individuals present malignant tumors more frequently than the general population, including nonmelanoma skin cancer. The individual genetic basis that acts in the pathogenesis of cutaneous cancer may present a protection or susceptibility factor for disease development. One of these factors is the HLA complex. Objective: To investigate HLA alleles association to the occurrence of nonmelanoma skin cancer in renal transplant recipients from São Paulo State. Methods: A total of 213 patients (93 renal transplant recipients with nonmelanoma skin cancer and 120 renal transplant recipients without nonmelanoma skin cancer) were evaluated by retrospective and cross-sectional study. Epidemiological, clinical and HLA typing data were found in databases. HLA class I (A, B) and class II (DR) alleles were compared to establish their association with nonmelanoma skin cancer. Results: Comparing renal transplant recipients with and without nonmelanoma skin cancer, the HLA-B*13 allele was associated with higher risk of developing nonmelanoma skin cancer while B*45 and B*50 alleles were associated with protection. Study limitations: The HLA A, B and DR alleles identification for the kidney transplantation routine is done by low and medium resolution techniques that do not allow discrimination of specific alleles. Conclusion: The involvement of HLA alleles in nonmelanoma skin cancer in renal transplant recipients was confirmed in this study. Renal transplant recipients with HLA-B*13 showed higher risk for developing a skin cancer (OR= 7.29) and should be monitored for a long period of time after transplantation.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Skin Neoplasms/genetics , Kidney Transplantation/adverse effects , HLA Antigens/genetics , Skin Neoplasms/etiology , Skin Neoplasms/epidemiology , Brazil/epidemiology , HLA-A Antigens/genetics , HLA-B Antigens/genetics , HLA-DR Antigens/genetics , Case-Control Studies , Cross-Sectional Studies , Retrospective Studies , Genetic Predisposition to Disease/genetics , Alleles , Transplant Recipients
2.
J. pediatr. (Rio J.) ; 94(4): 432-439, July-Aug. 2018. tab, graf
Article in English | LILACS (Americas) | ID: biblio-954624

ABSTRACT

Abstract Objective: To evaluate the clinical features associated with adrenocortical hormone overexpression and familial cancer profiling as potential markers for early detection of adrenocortical tumors in children from South and Southeast Brazil. Methods: The clinical manifestations and anthropometric measurements of 103 children diagnosed with adrenocortical tumors were analyzed. Results: Between 1982 and 2011, 69 girls and 34 boys diagnosed with adrenocortical tumors were followed-up for a median time of 9.0 years (0-34 years). Signs of androgen overproduction alone (n = 75) or associated with cortisol (n = 18) were present in 90.3%. TP53 p.R337H mutation was found in 90.5% of patients. Stages I, II, III, and IV were observed in 45.6%, 27.2%, 19.4%, and 7.8% of patients, respectively. At diagnosis, there were no significant differences in height (p = 0.92) and weight (p = 0.22) among children with adrenocortical tumors, but children with virilization alone had significantly higher height-for-age Z-scores (0.92 ± 1.4) than children with hypercortisolism alone or combined (−0.32 ± 1,8; p = 0.03). The five-year overall survival was 76.7% (SD ± 4.2). Patients with advanced-stage disease had a significantly worse prognosis than those with limited disease (p < 0.001). During follow-up, ten of 55 p.R337H carrier parents developed cancer, whereas none of the 55 non-carriers did. Conclusions: Signs of adrenocortical hormone overproduction appear early, even in cases with early-stage. These signs can be identified at the physical examination and anthropometric measurements. In southern Brazil, pediatric adrenocortical tumor is a sentinel cancer for detecting families with germline p.R337H mutation in TP53 gene.


Resumo Objetivo: Avaliar as manifestações clínicas da hiperexpressão de hormônios do córtex da adrenal e câncer familiar como marcadores para a detecção precoce de tumores adrenocorticais em crianças do Sul e Sudeste do Brasil. Pacientes e métodos: Foram analisadas as manifestações clínicas e antropométricas de 103 crianças diagnosticadas com tumores adrenocorticais. Resultados: Entre 1982 e 2011, 69 meninas e 34 meninos diagnosticados com tumores adrenocorticais foram acompanhados por um tempo mediano de nove anos (0-34). Ao diagnóstico, sinais de virilização isolada (n = 75) ou associada ao cortisol (n = 18) estavam presentes em 90,3% dos pacientes; a mutação do gene TP53 p.R337H foi identificada em 90,5% dos pacientes. Os pacientes foram classificados em estádio I (45,6%), II (27,2%), III (19,4%) e IV (7,8%). Ao diagnóstico, não houve diferença significativa para as medidas de altura (p = 0,92) e de peso (p = 0,22) entre as crianças com tumores adrenocorticais, mas crianças com virilização tiveram escore-Z mais elevado para a idade (0,92 ± 1,4) do que aquelas com hipercortisolismo isolado ou combinado (−0,32 ± 1,8; p = 0,03). A sobrevida global de cinco anos foi de 76,7% (DP ± 4,2). Pacientes com estádios avançados tiveram pior prognóstico (p < 0,001). Durante o seguimento, 10 dos 55 genitores portadores da p.R337H desenvolveram câncer, enquanto que nenhum caso ocorreu entre os 55 não portadores. Conclusões: Os sinais de hiperprodução de hormônios adrenocorticais aparecem precocemente no desenvolvimento do tumor e podem ser identificados pelo exame físico e pelas medidas antropométricas na consulta pediátrica de rotina. O tumor adrenocortical pediátrico é sentinela para a detecção de câncer em famílias que segregam a mutação germinativa p.R337H do gene TP53.


Subject(s)
Humans , Male , Female , Infant , Child, Preschool , Child , Genes, p53/genetics , Tumor Suppressor Protein p53/genetics , Adrenal Cortex Neoplasms/diagnosis , Adrenal Cortex Neoplasms/genetics , Germ-Line Mutation/genetics , Genetic Predisposition to Disease/genetics , Pedigree , Longitudinal Studies , Neoplasm Staging
3.
An. bras. dermatol ; 93(1): 54-58, Jan.-Feb. 2018. tab, graf
Article in English | LILACS (Americas) | ID: biblio-887145

ABSTRACT

Abstract: Background: The association of glutathione S-transferases M1/T1 (GSTM1/T1) null polymorphisms with vitiligo was proposed in several studies including two Egyptian studies with contradictory results. Objective: The aim here was to assess the association between GSTM1/T1 null polymorphisms and the susceptibility to vitiligo in a larger sample of Egyptian patients with generalized vitiligo. Methods: This study included 122 vitiligo patients and 200 healthy controls that were age, and gender matched. Assessment of GSTM1/T1 gene polymorphisms was done using a multiplex polymerase chain reaction (PCR). Results: Increased odds of generalized vitiligo was observed with the null genotypes of GSTM1 and GSTT1 polymorphisms (P<0.05). Controls with GSTM1 null/GSTT1+ heterozygosis presented with a 2.97 odds protection from having generalized vitiligo (OR=2.97, 95%CI=1.1-7.7) (P=0.02) compared with patients. Study Limitations: Small sample size of patients. Conclusions: This study showed a significant trend towards an association with the combination of the GSTM1/GSTT1 double null polymorphism and generalized vitiligo. Individuals with GSTM1 null/GSTT1+ heterozygosis have a 2.97 odds protection from having generalized vitiligo compared with patients. It was is the first time, to our knowledge, that such an association has been reported.


Subject(s)
Humans , Male , Female , Child , Adolescent , Adult , Middle Aged , Aged , Young Adult , Polymorphism, Genetic/genetics , Vitiligo/genetics , Genetic Predisposition to Disease/genetics , Glutathione Transferase/genetics , Case-Control Studies , Egypt , Gene Frequency , Genotype
4.
Braz. j. med. biol. res ; 51(7): e7126, 2018. tab
Article in English | LILACS (Americas) | ID: biblio-889120

ABSTRACT

This study was performed to examine whether the AF4/FMR2 family, member 1 (AFF1) rs340630 polymorphism is involved in the genetic background of rheumatoid arthritis (RA) in a Chinese population. Two different study groups of RA patients and controls (328 RA patients and 449 healthy controls in the first study group; 232 RA patients and 313 controls in the second study group) were included in our study. Overall, there was no significant difference in either genotype (P=0.71 and 0.64 in the first and second study group, respectively) nor allele (in the first study group: A vs G, P=0.65, OR=1.05, 95%CI=0.85-1.29; in the second study group: G vs A, P=0.47, OR=1.10, 95%CI=0.86-1.40) frequencies of AFF1 rs340630 polymorphism between RA patients and controls. Our study represents the first report assessing the association of AFF1 rs340630 polymorphism with RA risk. No significant evidence was found for the dominant or recessive models. Further case-control studies with larger sample sizes and fine-mapping studies are needed to clarify the role of AFF1 in the genetic basis of RA.


Subject(s)
Humans , Male , Female , Middle Aged , Polymorphism, Genetic/genetics , Arthritis, Rheumatoid/genetics , Genetic Predisposition to Disease/genetics , Transcriptional Elongation Factors/genetics , DNA-Binding Proteins/genetics , Case-Control Studies , Asian Continental Ancestry Group , Gene Frequency , Genotype
5.
Rev. bras. reumatol ; 57(2): 149-153, Mar.-Apr. 2017. tab
Article in English | LILACS (Americas) | ID: biblio-844225

ABSTRACT

Abstract Aim: To investigate the relation between vascular endothelial growth factor (VEGF) gene polymorphism in systemic lupus erythematosus (SLE) patients and lupus related neuropsychiatric manifestations. Patients and methods: Sixty adult SLE patients recruited from the Rheumatology and Neurology departments of Cairo University hospitals were classified into two groups; Group A: 30 patients with neuropsychiatric manifestations (NPSLE) and Group B: 30 patients without. For both groups the SNP G1612A (rs10434) of the VEGF gene was genotyped by real time polymerase chain reaction (RT-PCR). Results: Statistically significant difference was found in genotype and allele frequencies between both groups (AA [70% vs 13.3%, p < 0.001] and GG [10% vs 66.7%, p < 0.001]). Conclusion: Polymorphism in the gene coding for VEGF may be associated with increased incidence of neuropsychiatric lupus in SLE patients.


Resumo Objetivo: Investigar a relação entre o polimorfismo genético do fator de crescimento vascular endotelial (VEGF) em pacientes com lúpus eritematoso sistêmico (LES) e manifestações neuropsiquiátricas relacionadas com o lúpus. Pacientes e métodos: Foram recrutados 60 pacientes adultos com LES nos departamentos de Reumatologia e Neurologia de hospitais universitários do Cairo e classificados em dois grupos; grupo A: 30 pacientes com manifestações neuropsiquiátricas (LESNP) e grupo B: 30 pacientes sem manifestações neuropsiquiátricas. Genotipou-se o SNP G1612A (rs10434) do gene VEGF em ambos os grupos por reação em cadeia da polimerase em tempo real (RT-PCR). Resultados: Foi encontrada diferença estatisticamente significativa nas frequências genotípicas e alélicas entre os dois grupos (AA [70% vs. 13,3%, p < 0,001] e GG [10% vs. 66,7%, p < 0,001]). Conclusão: O polimorfismo no gene que codifica o VEGF pode estar associado ao aumento na incidência de lúpus neuropsiquiátrico em pacientes com LES.


Subject(s)
Humans , Male , Female , Adult , Young Adult , Genetic Predisposition to Disease/genetics , Lupus Vasculitis, Central Nervous System/genetics , Lupus Vasculitis, Central Nervous System/psychology , Polymorphism, Single Nucleotide , Vascular Endothelial Growth Factor A/genetics , Pilot Projects , Cross-Sectional Studies , Lupus Vasculitis, Central Nervous System/diagnosis , Lupus Vasculitis, Central Nervous System/physiopathology , Gene Expression Profiling , Vascular Endothelial Growth Factor A/metabolism , Genotype , Middle Aged
6.
Braz. j. med. biol. res ; 50(6): e5758, 2017. tab, graf
Article in English | LILACS (Americas) | ID: biblio-839304

ABSTRACT

This study aimed to determine the role of mitofusin 2 (MFN2) gene polymorphisms in the risk and prognosis of acute liver failure (ALF). A total of 298 blood samples were collected from 138 ALF patients (case group) and 160 healthy participants (control group). Coagulation function, glutamic pyruvic transaminase (GPT), glutamic oxaloacetic transaminase (GOT), total bilirubin (TB), blood ammonia and lactic acid (LA) were measured. The predictive evaluation of MFN2 gene polymorphisms in the risk and prognosis of ALF patients was estimated using Kaplan-Meier survival analysis, haplotype analysis, binary logistic regression analysis and Cox regression analysis. Higher levels of GPT, GOT, TB, blood ammonia and LA were observed in ALF patients with the GG genotype of rs873457 or the TT genotype of rs4846085 than in those with the CC genotype of these two SNPs. The GTACAGC and GTGTGGC haplotypes were a protective factor and a risk factor for ALF, respectively. Blood ammonia and LA levels were independent risk factors and the CC genotype of rs873457 and the CC genotype of rs4846085 were protective factors for ALF. ALF patients with the GG genotype of rs873457 or the TT genotype of rs4846085 had a lower survival rate than those with other genotypes of these two SNPs. The rs4846085 and rs873457 polymorphisms were both independent factors affecting the prognosis of ALF patients. MFN2 gene polymorphisms (rs873457, rs2336384, rs1474868, rs4846085 and rs2236055) may be associated with ALF and the rs873457 and rs4846085 polymorphisms are correlated with the risk and prognosis of ALF.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Young Adult , GTP Phosphohydrolases/genetics , Liver Failure, Acute/genetics , Mitochondrial Proteins/genetics , Polymorphism, Single Nucleotide , Ammonia/blood , Asian Continental Ancestry Group/genetics , Case-Control Studies , China , Gene Frequency/genetics , Genetic Predisposition to Disease/genetics , Genotype , Hepatitis A/genetics , Kaplan-Meier Estimate , Lactic Acid/blood , Liver Failure, Acute/blood , Risk Factors , Survival Analysis
7.
Braz. j. med. biol. res ; 50(9): e6306, 2017. tab, graf
Article in English | LILACS (Americas) | ID: biblio-888996

ABSTRACT

Published data on the association between Toll-like receptor 4 (TLR4) Asp299Gly polymorphism and coronary heart disease (CHD) susceptibility are inconclusive. To derive a more precise estimation of the relationship, a meta-analysis was performed. English-language studies were identified by searching PubMed and Embase databases (up to November 2016). All epidemiological studies were regarding Caucasians because no TLR4 Asp/Gly and Gly/Gly genotypes have been detected in Asians. A total of 20 case-control studies involving 14,416 cases and 10,764 controls were included in the meta-analysis. Overall, no significant associations were found between TLR4 Asp299Gly polymorphism and CHD susceptibility in the dominant model (OR=0.89; 95%CI=0.74 to 1.06; P=0.20) pooled in the meta-analysis. In the subgroup analysis by CHD, non-significant associations were found in cases compared to controls. When stratified by control source, no significantly decreased risk was found in the additive model or dominant model. The present meta-analysis suggests that the TLR4 Asp299Gly polymorphism was not associated with decreased CHD risk in Caucasians.


Subject(s)
Humans , Polymorphism, Genetic/genetics , Coronary Disease/genetics , Genetic Predisposition to Disease/genetics , Toll-Like Receptor 4/genetics , Case-Control Studies , Genotype
8.
Rev. bras. reumatol ; 56(6): 521-529, Nov.-Dec. 2016. tab, graf
Article in English | LILACS (Americas) | ID: biblio-830070

ABSTRACT

ABSTRACT Objective: To investigate potential associations of four substitutions in NAT2 gene and of acetylator phenotype of NAT2 with systemic lupus erythematosus (SLE) and clinical phenotypes. Methods: Molecular analysis of 481C>T, 590G>A, 857G>A, and 191G>A substitutions in the NAT2 gene was performed by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique, from DNA extracted from peripheral blood samples obtained from patients with SLE (n = 91) and controls (n = 97). Results and conclusions: The 857GA genotype was more prevalent among nonwhite SLE patients (OR = 4.01, 95% CI = 1.18-13.59). The 481T allele showed a positive association with hematological disorders that involve autoimmune mechanisms, specifically autoimmune hemolytic anemia or autoimmune thrombocytopenia (OR = 1.97; 95% CI = 1.01-3.81).


RESUMO Objetivo: Investigar potenciais associações de quatro substituições do gene NAT2 (N-acetiltransferase 2) e do fenótipo acetilador de NAT2 com o lúpus eritematoso sistêmico (LES) e os fenótipos clínicos. Métodos: A análise molecular das substituições 481C > T, 590G > A, 857G > A e 191G > A do gene NAT2 foi feita com a técnica de PCR-RFLP, usando DNA extraído de amostras de sangue periférico obtidas de pacientes com LES (n = 91) e controles (n = 97). Resultados e conclusões: O genótipo 857GA foi mais prevalente entre pacientes com LES não brancas (OR = 4,01, IC 95% = 1,18-13,59). O alelo 481 T apresentou associação positiva com as alterações hematológicas que envolvem mecanismos autoimunes, especificamente anemia hemolítica autoimune ou trombocitopenia autoimune (OR = 1,97; IC 95% = 1,01-3,81).


Subject(s)
Humans , Arylamine N-Acetyltransferase/genetics , Polymorphism, Restriction Fragment Length/genetics , Lupus Erythematosus, Systemic/genetics , Genetic Predisposition to Disease/genetics , Genotype
9.
J. pediatr. (Rio J.) ; 92(5): 493-498, Sept.-Oct. 2016. tab
Article in English | LILACS (Americas) | ID: lil-796118

ABSTRACT

Abstract Objective: To determine the association between overweight/obesity in schoolchildren with FTO rs9939609 polymorphism (fatmass and obesity associated) and family history of obesity. Methods: Cross-sectional study comprising a sample of 406 children aged 7-17 years in a city in southern Brazil. Overweight/obesity in schoolchildren was assessed by body mass index (BMI), and family history of obesity was self-reported by parents. Polymorphism genotyping was performed by real time PCR (polymerase chain reaction). The association between the nutritional status of schoolchildren with the presence of family obesity, stratified by polymorphism genotypes (AA [at-risk for obesity], AT, and TT), was assessed by prevalence ratio values (PR) through Poisson regression. Results: Among schoolchildren with the AA genotype, 57.4% had overweight/obesity; the percentage was lower for the AT and TT genotypes (33.1% and 28.9%, respectively). Overweight/obesity in schoolchildren was associated with a family history of obesity, especially among children with the AA genotype. The prevalence was higher among those with an obese mother (PR: 1.28; p < 0.001), obese maternal or paternal grandmother (PR: 1.22; p = 0.047), and obese paternal grandfather (PR: 1.32; p < 0.001). Conclusions: There is an association between the AA genotype of rs9939609 polymorphism and BMI among schoolchildren. The association between overweight/obesity in schoolchildren with a family history of obesity was found mainly among students with the AA genotype.


Resumo Objetivo Verificar se existe relação entre o sobrepeso/obesidade de escolares com o polimorfismo rs9939609, do gene FTO (fat mass and obesity associated), e com o histórico familiar de obesidade. Métodos Estudo transversal composto por uma amostra de 406 escolares, de sete a 17 anos, de um município do sul do Brasil. O sobrepeso/obesidade dos escolares foi avaliado(a) por meio do índice de massa corporal (IMC) e o histórico familiar de obesidade por questões autorreferidas pelos pais. A genotipagem do polimorfismo foi feita por PCR (polymerase chain reaction) em tempo real. A associação entre o estado nutricional dos escolares com a presença de obesidade familiar, estratificada pelos genótipos do polimorfismo (AA - risco para obesidade, AT e TT), foi avaliada pelos valores de razão de prevalência (RP), por meio da regressão de Poisson. Resultados Entre os escolares com o genótipo AA, 57,4% apresentaram sobrepeso/obesidade; para os genótipos TT e AT, o percentual é inferior (33,1% e 28,9%, respectivamente). O sobrepeso/obesidade do escolar associou-se com o histórico familiar de obesidade, principalmente entre os escolares portadores do genótipo AA, foi superior entre os que apresentam mãe obesa (RP: 1,28; p < 0,001), avó materna e paterna obesas (RP: 1,22; p = 0,047) e avô paterno obeso (RP: 1,32; p < 0,001). Conclusões Há relação entre o genótipo AA, do polimorfismo rs9939609, com o IMC dos escolares avaliados. A relação entre sobrepeso/obesidade do escolar com o histórico familiar de obesidade foi encontrada, principalmente, entre os escolares com o genótipo AA.


Subject(s)
Humans , Male , Female , Child , Adolescent , Pedigree , Polymorphism, Genetic/genetics , Overweight/genetics , Pediatric Obesity/genetics , Alpha-Ketoglutarate-Dependent Dioxygenase FTO/genetics , Body Mass Index , Nutritional Status/genetics , Cross-Sectional Studies , Genetic Predisposition to Disease/genetics , Genetic Association Studies
10.
Rev. bras. reumatol ; 56(5): 414-420, Sept.-Oct. 2016. tab, graf
Article in English | LILACS (Americas) | ID: lil-798103

ABSTRACT

ABSTRACT Background: Rheumatoid arthritis is a widely prevalent autoimmune disorder with suggested genetic predisposition. Objectives: The aim of this study is to detect the pattern of genetic polymorphism of methylene tetrahydrofolate reductase (MTHFR C677 T and A1298 C), transforming growth factor-β1 (TGF-β1 T869 C) and lymphotoxin-α (LT-α A252G) in patients having rheumatoid arthritis and correlate these patterns to disease activity and serum levels of tumor necrosis factor-alpha (TNF-α), B-Cell Activating Factor (BAFF), and osteopontin. Methods: A total of 194 subjects, 90 controls and 104 patients with rheumatoid arthritis were genotyped for MTHFR C677 T and A1298 C, TGF-β1 T869 C and LT-α A252G polymorphisms using a methodology based on PCR-RFLP. Also serum levels of TNF-α, osteopontin and BAFF were measured by ELISA kits. Results: The CT genotype and T allele of MTHFR C677 T and GG genotype and G allele of LT-α A252G are associated with the risk of RA and with higher levels of the pro-inflammatory cytokine, TNF-α in patients with rheumatoid arthritis. Conclusion: Our findings suggest that there is association between MTHFR C677 T and LT-α A252G genes polymorphisms and increased risk of RA in this sample of Egyptian population.


RESUMO Antecedentes: A artrite reumatoide é uma doença autoimune amplamente prevalente com sugerida predisposição genética. Objetivos: Detectar o padrão de polimorfismo dos genes metilenotetrahidrofolato redutase (MTHFR C677 T e A1298 C), fator de crescimento transformador β1 (TGF-β1 T869 C) e linfotoxina-α (LT-α A252G) em pacientes com artrite reumatoide e correlacionar esses padrões com a atividade da doença e os níveis séricos de fator de necrose tumoral alfa (TNF-α), fator ativador de linfócitos B (BAFF) e osteopontina. Métodos: Foram genotipados 194 indivíduos – 90 controles e 104 com artrite reumatoide – à procura de polimorfismos dos genes MTHFR C677 T e A1298 C, TGF-β1 T869 C e LT-α A252G com uma metodologia baseada na PCR-RFLP. Mensuraram-se também os níveis séricos de TNF-α, osteopontina e BAFF com kits de Elisa. Resultados: O genótipo CT e o alelo T do MTHFR C677 T e o genótipo GG e alelo G do LT-α A252G estão associados ao risco de AR e a níveis mais elevados da citocina pró-inflamatória TNF-α em pacientes com artrite reumatoide. Conclusão Os achados do presente estudo sugerem que há associação entre os polimorfismos dos genes MTHFR C677 T e LT-α A252G e um risco aumentado de AR nessa amostra da população egípcia.


Subject(s)
Humans , Arthritis, Rheumatoid/genetics , Lymphotoxin-alpha/genetics , Methylenetetrahydrofolate Reductase (NADPH2)/genetics , Transforming Growth Factor beta1/genetics , Arthritis, Rheumatoid/epidemiology , Transforming Growth Factors , Genetic Predisposition to Disease/genetics , Polymorphism, Single Nucleotide/genetics , Egypt
11.
Mem. Inst. Oswaldo Cruz ; 111(2): 101-105, Feb. 2016. tab
Article in English | LILACS (Americas) | ID: lil-772613

ABSTRACT

Natural resistance-associated macrophage protein 1/solute carrier family 11 member 1 gene (Nramp1/Slc11a1) is a gene that controls the susceptibility of inbred mice to intracellular pathogens. Polymorphisms in the human Slc11a1/Nramp1 gene have been associated with host susceptibility to leprosy. This study has evaluated nine polymorphisms of the Slc11a1/Nramp1 gene [(GT)n, 274C/T, 469+14G/C, 577-18G/A, 823C/T, 1029 C/T, 1465-85G/A, 1703G/A, and 1729+55del4] in 86 leprosy patients (67 and 19 patients had the multibacillary and the paucibacillary clinical forms of the disease, respectively), and 239 healthy controls matched by age, gender, and ethnicity. The frequency of allele 2 of the (GT)n polymorphism was higher in leprosy patients [p = 0.04, odds ratio (OR) = 1.49], whereas the frequency of allele 3 was higher in the control group (p = 0.03; OR = 0.66). Patients carrying the 274T allele (p = 0.04; OR = 1.49) and TT homozygosis (p = 0.02; OR = 2.46), such as the 469+14C allele (p = 0.03; OR = 1.53) of the 274C/T and 469+14G/C polymorphisms, respectively, were more frequent in the leprosy group. The leprosy and control groups had similar frequency of the 577-18G/A, 823C/T, 1029C/T, 1465-85G/A, 1703G/A, and 1729+55del4 polymorphisms. The 274C/T polymorphism in exon 3 and the 469+14G/C polymorphism in intron 4 were associated with susceptibility to leprosy, while the allele 2 and 3 of the (GT)n polymorphism in the promoter region were associated with susceptibility and protection to leprosy, respectively.


Subject(s)
Adult , Aged , Female , Humans , Male , Middle Aged , Young Adult , Cation Transport Proteins/genetics , Genetic Predisposition to Disease/genetics , Leprosy/genetics , Polymorphism, Genetic/genetics , Brazil , Case-Control Studies , Gene Frequency , Logistic Models , Leprosy, Multibacillary/genetics , Leprosy, Multibacillary/microbiology , Leprosy, Paucibacillary/genetics , Leprosy, Paucibacillary/microbiology , Leprosy/microbiology
12.
Yonsei Medical Journal ; : 153-164, 2016.
Article in English | WPRIM (Western Pacific) | ID: wprim-186109

ABSTRACT

PURPOSE: The -1237T/C polymorphism of the Toll-like receptor 9 (TLR9) gene has been implicated in the susceptibility of inflammatory bowel diseases (IBDs), but the results remain conflicting. We further investigated this association via meta-analysis. MATERIALS AND METHODS: Multiple electronic databases were extensively searched until February, 2015. The strength of association was evaluated by calculating the pooled odds ratios (ORs) and 95% confidence intervals (CIs). RESULTS: A total of 2987 cases and 2388 controls from eight studies were analyzed. Overall, association was found between TLR9 -1237T/C polymorphism and the risk of IBDs when all the studies were pooled (recessive model, OR: 1.59, 95% CI: 1.02-2.47, p=0.04; homozygote comparison, OR: 1.62, 95% CI: 1.04-2.52, p=0.03; allele model, OR: 1.13, 95% CI: 1.00-1.27, p=0.05). Stratification by ethnicity indicated an association between TLR9 -1237T/C polymorphism and IBDs risk in Caucasians (recessive model, OR: 1.59, 95% CI: 1.02-2.47, p=0.04; homozygote comparison, OR: 1.62, 95% CI: 1.04-2.52, p=0.03; allele model, OR: 1.12, 95% CI: 1.00-1.27, p=0.05). When stratified by disease type, significant correlation were only found in the Crohn's disease subgroup (recessive model, OR: 1.69, 95% CI: 1.05-2.73, p=0.03; homozygote model, OR: 1.74, 95% CI: 1.07-2.82, p=0.02; allele model, OR: 1.15, 95% CI: 1.01-1.32, p=0.04). CONCLUSION: The present study suggested that the TLR9 -1237T/C polymorphism might act as a risk factor in the development of IBDs, particularly in Caucasians.


Subject(s)
Alleles , European Continental Ancestry Group/genetics , Genetic Predisposition to Disease/genetics , Homozygote , Humans , Inflammatory Bowel Diseases/ethnology , Odds Ratio , Polymorphism, Genetic/genetics , Risk Factors , Toll-Like Receptor 9/genetics
13.
Rev. méd. Chile ; 143(10): 1252-1259, oct. 2015. tab
Article in Spanish | LILACS (Americas) | ID: lil-771708

ABSTRACT

Background: Serotonin plays a central role regulating mood and on the development of depressive disorders. Aim: To study whether 5HTTLPR functional polymorphisms in the serotonin transporter gene or the Monoamine oxidase A gene (uMAOA) were risk markers for depression. Material and Methods: The Composite International Diagnostic Interview (CIDI) was applied to 1,062 consultants in primary health care centers aged between 18 and 75 years to establish the diagnosis of depression. A sample of saliva was obtained for DNA extraction and genetic analyses. Results: No association between the presence of depressive disorders and 5HTTLPR (ss) or uMAOA (3/3) risk genotypes was found. Psychological abuse and the presence of two or more life events were found to be predictors of depression in the studied sample. Conclusions: In this study, 5HTTLPR and uMAOA polymorphisms were not risk factors for depression. However, psychological abuse and the presence of two or more life events were risk factors for depressive disorders.


Subject(s)
Adolescent , Adult , Aged , Humans , Male , Middle Aged , Young Adult , Depression/genetics , Genetic Predisposition to Disease/genetics , Monoamine Oxidase/genetics , Polymorphism, Genetic/genetics , Serotonin Plasma Membrane Transport Proteins/genetics , Biomarkers , Depression/psychology , Genotype , Prospective Studies , Risk Factors , Socioeconomic Factors , Stress, Psychological/complications
14.
Clinics ; 70(10): 680-685, Oct. 2015. tab
Article in English | LILACS (Americas) | ID: lil-762961

ABSTRACT

OBJECTIVES:We examined the influence of CYP1A1 A4889G and T6235C polymorphisms on the risk of sporadic breast cancer.METHODS:DNA from 742 sporadic breast cancer patients and 742 controls was analyzed using the polymerase chain reaction, followed by the restriction fragment length polymorphism technique.RESULTS:More patients had the CYP1A1 4889AG+GG genotype compared to controls (29.0% versus 23.2%, p=0.004). The G allele carriers had a 1.50-fold increased risk (95% CI: 1.14-1.97) of sporadic breast cancer compared to the other study participants. The frequency of the 4889AG+GG genotype among the Caucasian patients was higher than in the non-Caucasian patients (30.4% versus 20.2%, p=0.03) and controls (30.4% versus 23.2%, p=0.002). Caucasians and G allele carriers had a 1.61-fold increased risk (95% CI: 1.20-2.15) of sporadic breast cancer compared to other subjects. The CYP1A1 4889AG+GG genotype was more common among patients with a younger median age at first full-term pregnancy than among controls (33.8% versus 23.2%, p=0.001) and subjects whose first full-term pregnancies occurred at an older age (33.8% versus 26.1%, p=0.03). Women with the CYP1A1 4889AG+GG genotype and earlier first full-term pregnancies had a 1.87-fold (95% CI: 1.32-2.67) increased risk of sporadic breast cancer compared to the other study participants. Excess CYP1A1 4889AG+GG (39.8% versus27.1%, p=0.01) and 6235TC+CC (48.4% versus 35.9%, p=0.02) genotypes were also observed in patients with grade I and II tumors compared to patients with grade III tumors and controls (39.8% versus 23.2%, p=0.04; 48.4% versus 38.6%, p=0.04). The G and C allele carriers had a 2.44-fold (95% CI: 1.48-4.02) and 1.67-fold (95% CI: 1.03-2.69) increased risk, respectively, of developing grade I and II tumors compared to other subjects.CONCLUSIONS:The CYP1A1 A4889G and T6235C polymorphisms may alter the risk of sporadic breast cancer in Brazilian women.


Subject(s)
Adult , Aged , Aged, 80 and over , Female , Humans , Middle Aged , Pregnancy , Young Adult , Breast Neoplasms/genetics , /genetics , Genetic Predisposition to Disease/genetics , Polymorphism, Genetic , Brazil , Genetic Association Studies , Genotype , Polymerase Chain Reaction , Polymorphism, Restriction Fragment Length , Risk Factors
15.
Int. arch. otorhinolaryngol. (Impr.) ; 19(2): 187-190, Apr-Jun/2015. graf
Article in English | LILACS (Americas) | ID: lil-747157

ABSTRACT

Introduction Juvenile nasopharyngeal angiofibroma is a rare benign neoplasm in the nasopharynx. The tumor tends to be locally aggressive and is typically seen in adolescent boys. Extranasopharyngeal angiofibromas have been reported sporadically in the literature. They most commonly originate from the maxillary sinus. Objectives A 26-year-old woman was referred to our clinic with intermittent epistaxis from the right nasal passage for the previous 2 months. Maxillofacial magnetic resonance imaging showed a lobular, contoured mass originating from the right inferior turbinate and hanging in the right nasal cavity, with dense contrast enhancement denoting hypervascularity. Resumed Report Vascular feeding of the mass was seen from the right internal maxillary artery with angiography, and this branch was embolized. On the following day, the patient underwent transnasal endoscopic excision of the mass. An approximately 3-cm-diameter mass was excised by partial turbinectomy, and the posterior edge of the remaining turbinate was cauterized. Conclusion Extranasopharyngeal angiofibromas are rarely seen, and the inferior turbinate is an extremely rare location for them. This young woman is the first case reported in the English literature of angiofibroma originating from the inferior turbinate. We should consider these neoplasms can be found in female, nonadolescent patients with extranasopharyngeal localization, and we should not perform biopsy because of its massive bleeding. .


Subject(s)
Female , Humans , Middle Aged , Breast Neoplasms/genetics , Carcinoma in Situ/genetics , Carcinoma, Lobular/genetics , Genetic Predisposition to Disease/genetics , Case-Control Studies , Genome-Wide Association Study , Genotype , Polymorphism, Single Nucleotide/genetics
16.
Arq. gastroenterol ; 52(2): 143-146, Apr-Jun/2015. tab, graf
Article in English | LILACS (Americas) | ID: lil-748171

ABSTRACT

Background Celiac disease is an autoimmune enteropathy triggered by the ingestion of gluten in genetically susceptible individuals. Genetic susceptibility is associated with two sets of alleles, DQA1*05 - DQB1*02 and DQA1*03 - DQB1*03:02, which code for class II MHC DQ2 and DQ8 molecules, respectively. Approximately 90%-95% of celiac patients are HLA-DQ2 positive, and half of the remaining patients are HLA-DQ8 positive. In fact, during a celiac disease diagnostic workup, the absence of these specific DQA and DQB alleles has a near perfect negative predictive value. Objective Improve the detection of celiac disease predisposing alleles by combining the simplicity and sensitivity of real-time PCR (qPCR) and melting curve analysis with the specificity of sequence-specific primers (SSP). Methods Amplifications of sequence-specific primers for DQA1*05 (DQ2), DQB1*02 (DQ2), and DQA1*03 (DQ8) were performed by the real time PCR method to determine the presence of each allele in independent reactions. Primers for Human Growth Hormone were used as an internal control. A parallel PCR-SSP protocol was used as a reference method to validate our results. Results Both techniques yielded equal results. From a total of 329 samples the presence of HLA predisposing alleles was determined in 187 (56.8%). One hundred fourteen samples (61%) were positive for a single allele, 68 (36.3%) for two alleles, and only 5 (2.7%) for three alleles. Conclusion Results obtained by qPCR technique were highly reliable with no discordant results when compared with those obtained using PCR-SSP. .


Contexto Doença celíaca é uma enteropatia autoimmune desencadeada pela ingestão de gluten em indivíduos geneticamente suscetíveis. Essa suscetibilidade genética está associada a dois conjuntos de alelos, DQA1*05 - DQB1*02 e DQA1*03 - DQB1*03:02, que codificam moléculas MHC de classe II DQ2 e DQ8, respectivamente. Aproximadamente 90%-95% dos pacientes celíacos são HLA-DQ2 positivos, e metade dos restantes são HLA-DQ8 positivos. No diagnóstico da doença celíaca, a ausência desses alelos DQA e DQB específicos possui um elevado valor preditivo negativo. Objetivo Nosso objetivo foi melhorar a detecção de alguns alelos predisponentes para doença celíaca, combinando a simplicidade e sensibilidade da técnica de PCR em tempo real (qPCR) e análise da curva de melting com a especificidade dos primers de sequência específica. Métodos Primers de sequência específica para DQA1*05 (DQ2), DQB1*02 (DQ2), e DQA1*03 (DQ8) foram usados para testar a presença de cada alelo em reações independentes. Primers para Hormônio de Crescimento Humano foram usados como controle interno. Em paralelo, foi usado um protocolo de PCR-SSP como um método de referência para validar nossos resultados positivos. Resultados Das 329 amostras testadas, 187 (56.8%) foram positivas para os alelos HLA predisponentes, usando as duas técnicas. Essas 187 amostras positivas foram subdivididas em 114 (61.0%) positivas para apenas um alelo, 68 (36.3%) para dois alelos e apenas 5 (2.7%) para os três alelos. Conclusão Os resultados obtidos pela técnica de qPCR mostraram-se altamente confiáveis, sem resultados discordantes quando comparados àqueles obtidos pelo método PCR-SSP. .


Subject(s)
Humans , Alleles , Celiac Disease/genetics , Genetic Predisposition to Disease/genetics , HLA-DQ Antigens/genetics , Celiac Disease/diagnosis , Genotype , Predictive Value of Tests , Real-Time Polymerase Chain Reaction , Sensitivity and Specificity
17.
J. appl. oral sci ; 23(3): 295-301, May-Jun/2015. tab
Article in English | LILACS (Americas) | ID: lil-752434

ABSTRACT

Objectives Oral lichen planus (OLP) is a chronic inflammatory oral mucosal disease. Cytokines play an important role in the pathogenesis and disease progression of OLP. Various reports have implicated cytokine gene polymorphisms in susceptibility to develop some immune mediated conditions including OLP. The purpose of this study was to investigate the association of tumor necrosis factor (TNF)-α, TNF-β and interleukin (IL)-10 gene polymorphisms with the OLP risk. Material and Methods Forty two unrelated patients with OLP and 211 healthy volunteers were genotyped for TNF-α (-308 G/A), TNF-β (+252A/G), IL-10 (-1082G/A), IL-10 (-819C/T), and IL-10 (-592C/A) polymorphisms. Results The frequencies of allele A and genotype GA of TNF-α (-308G/A) were significantly higher while allele G and GG genotypes were lower in OLP patients as compared to the controls (P<0.001). The frequency of GA genotype of TNF-β (+252A/G) was significantly higher in patients than in controls while the AA genotype was completely absent in OLP patients. These results indicated that allele A and genotype GA of TNF-α (-308G/A) as well as the GA genotype of TNF-β (+252A/G) polymorphisms are associated with OLP risk. The frequencies of alleles and genotypes of -1082G/A, -819C/T and -592C/A polymorphisms in IL-10 gene did not differ significantly between OLP patients and controls (P>0.05). However, haplotype ATA extracted from 1082G/A, -819C/T, -592C/A polymorphisms of IL-10 were more prevalent in OLP patients when compared to controls indicating its possible association with OLP susceptibility. Conclusion It is concluded that TNF-α (-308G/A), TNF-β (+252A/G) and IL-10 (-1082G/A, -819C/T and -592C/A) polymorphisms are associated with the susceptibility of OLP, thus giving additional support for the genetic basis of this disease. .


Subject(s)
Adult , Aged , Female , Humans , Male , Middle Aged , Young Adult , /genetics , Lichen Planus, Oral/genetics , Lymphotoxin-alpha/genetics , Polymorphism, Single Nucleotide/genetics , Tumor Necrosis Factor-alpha/genetics , Case-Control Studies , Gene Frequency , Genetic Association Studies , Genetic Predisposition to Disease/genetics , Lichen Planus, Oral/pathology , Polymerase Chain Reaction , Reference Values , Risk Factors , Saudi Arabia , Sex Factors
18.
Braz. j. med. biol. res ; 48(5): 382-391, 05/2015. tab, graf
Article in English | LILACS (Americas) | ID: lil-744376

ABSTRACT

Lung cancer often exhibits molecular changes, such as the overexpression of the ErbB1 gene that encodes epidermal growth factor receptor (EGFR). ErbB1 amplification and mutation are associated with tumor aggressiveness and low response to therapy. The aim of the present study was to design a schedule to synchronize the cell cycle of A549 cell line (a non-small cell lung cancer) and to analyze the possible association between the micronuclei (MNs) and the extrusion of ErbB1 gene extra-copies. After double blocking, by the process of fetal bovine serum deprivation and vincristine treatment, MNs formation was monitored with 5-bromo-2-deoxyuridine (BrdU) incorporation, which is an S-phase marker. Statistical analyses allowed us to infer that MNs may arise both in mitosis as well as in interphase. The MNs were able to replicate their DNA and this process seemed to be non-synchronous with the main cell nuclei. The presence of ErbB1 gene in the MNs was evaluated by fluorescent in situ hybridization (FISH). ErbB1 sequences were detected in the MNs, but a relation between the MNs formation and extrusion of amplified ErbB1could not be established. The present study sought to elucidate the meaning of MNs formation and its association with the elimination of oncogenes or other amplified sequences from the tumor cells.


Subject(s)
Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Alzheimer Disease , Apolipoproteins E/genetics , Brain/pathology , Cholesterol Ester Transfer Proteins/genetics , Polymorphism, Genetic/genetics , Age Distribution , Atrophy , Alzheimer Disease/epidemiology , Alzheimer Disease/genetics , Alzheimer Disease/pathology , Follow-Up Studies , Genotype , Genetic Predisposition to Disease/epidemiology , Genetic Predisposition to Disease/genetics , Magnetic Resonance Imaging , Risk Factors
19.
J. pediatr. (Rio J.) ; 91(2): 130-135, Mar-Apr/2015. tab
Article in English | LILACS (Americas) | 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
20.
Int. arch. otorhinolaryngol. (Impr.) ; 19(1): 96-98, Jan-Mar/2015. graf
Article in English | LILACS (Americas) | ID: lil-741540

ABSTRACT

Introduction Mucoceles are benign expansive cystic formations, composed of a mucus-secreting epithelium (respiratory or pseudostratified epithelium). Nasolacrimal mucocele occurs in a small proportion of children with nasolacrimal duct obstruction and is characterized by a cystic mass in the medial canthus with dilation of the nasolacrimal duct; although dacryocystoceles are rare in adults, they have been reported in patients with trachoma. Objective Discuss clinical aspects, diagnosis, and therapeutic management of mucocele of nasolacrimal duct based on literature review. Resumed Report The authors report a case of bilateral congenital nasolacrimal duct cysts in a 30-year-old man, identified as a tumor in the topography of both lacrimal sacs since birth without associated symptoms. The patient underwent successive surgical treatments, leading to recurrence of the tumor at the right side and recurrent local infections. Conclusion Endoscopic dacryocystorhinostomy has been increasingly used with good results and success rates similar to the external access. .


Subject(s)
Animals , Humans , Genetic Predisposition to Disease/genetics , Mutation/genetics , Nervous System Diseases/genetics , Sodium-Potassium-Exchanging ATPase/genetics , Databases, Bibliographic/statistics & numerical data , Hemiplegia/genetics , Models, Molecular , Nervous System Diseases/diagnosis , Parkinson Disease/genetics , Sodium-Potassium-Exchanging ATPase/metabolism
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