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1.
FASEB J ; 35(2): e21171, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33197074

RESUMO

Skeletal muscles have a high metabolic capacity, which play key roles in glucose metabolism. Although periodontal disease increases the risk of metabolic syndrome, the relationship between periodontal bacterial infection and skeletal muscle metabolic dysfunction is unclear. We found that anti-Porphyromonas gingivalis (Pg) antibody titers positively correlated with intramuscular adipose tissue content (IMAC), fasting blood glucose, and HOMA-IR in metabolic syndrome patients. In C57BL/6J mice fed a high-fat diet, recipients of oral Pg (HFPg) had impaired glucose tolerance, insulin resistance, and higher IMAC compared to recipients of saline (HFco). The soleus muscle in HFPg mice exhibited fat infiltration and lower glucose uptake with higher Tnfa expression and lower insulin signaling than in HFco mice. Gene set enrichment analysis showed that TNFα signaling via NFκB gene set was enriched in the soleus muscle of HFPg mice. Moreover, TNF-α also decreased glucose uptake in C2C12 myoblast cells in vitro. Based on 16S rRNA sequencing, Pg administration altered the gut microbiome, particularly by decreasing the abundance of genus Turicibacter. Microbial network of the gut microbiome was dramatically changed by Pg administration. Our findings suggest that infection with Pg is a risk factor for metabolic syndrome and skeletal muscle metabolic dysfunction via gut microbiome alteration.


Assuntos
Infecções por Bacteroidaceae/metabolismo , Glicemia/metabolismo , Microbioma Gastrointestinal/genética , Síndrome Metabólica/sangue , Músculo Esquelético/metabolismo , Doenças Periodontais/sangue , Porphyromonas gingivalis/metabolismo , Tecido Adiposo/metabolismo , Adulto , Idoso , Animais , Anticorpos Antibacterianos/sangue , Anticorpos Antibacterianos/imunologia , Infecções por Bacteroidaceae/microbiologia , Linhagem Celular Transformada , Dieta Hiperlipídica , Fezes/microbiologia , Feminino , Intolerância à Glucose/metabolismo , Humanos , Imunoglobulina G/sangue , Imunoglobulina G/imunologia , Resistência à Insulina , Japão/epidemiologia , Masculino , Síndrome Metabólica/complicações , Síndrome Metabólica/epidemiologia , Síndrome Metabólica/microbiologia , Camundongos , Camundongos Endogâmicos C57BL , Pessoa de Meia-Idade , Mioblastos/metabolismo , Doenças Periodontais/complicações , Doenças Periodontais/epidemiologia , Doenças Periodontais/microbiologia , Porphyromonas gingivalis/genética , Porphyromonas gingivalis/imunologia , RNA Ribossômico 16S/genética
2.
J Clin Periodontol ; 49(12): 1275-1288, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-35817415

RESUMO

AIM: The purpose of this study was to elucidate the suppressive effect of high-frequency pulsed diode laser irradiation on bone resorption and its biological effects on gene expression and microbiome composition on the gingival tissue in ligature-induced periodontitis in mice. MATERIALS AND METHODS: Ligating ligature around the teeth and/or laser irradiation was performed on the gingival tissue in mice as follows: Co (no ligature and no laser irradiation), Li (ligation without laser irradiation), La (no ligature but with laser irradiation), and LiLa (ligation with laser irradiation). Bone resorption was evaluated using micro-computed tomography. RNA-seq analysis was performed on gingival tissues of all four groups at 3 days after ligation. The differences in microbial composition between Li and LiLa were evaluated based on the number of 16S rRNA gene sequences. RESULTS: Bone resorption caused by ligation was significantly suppressed by laser irradiation. RNA-seq in Co and La gingival tissue revealed many differentially expressed genes, suggesting diode laser irradiation altered gene expression. Gene set enrichment analysis revealed mTORC1 signalling and E2F target gene sets were enriched in gingival tissues both in La and LiLa compared with that in Co and Li, respectively. The amount of extracted DNA from ligatures was reduced by laser irradiation, and bacterial network structure was altered between the Li and LiLa. CONCLUSIONS: High-frequency pulsed diode laser irradiation showed biological effects and suppressed bone resorption in ligature-induced periodontitis.


Assuntos
Perda do Osso Alveolar , Reabsorção Óssea , Periodontite , Camundongos , Animais , Perda do Osso Alveolar/etiologia , Lasers Semicondutores/uso terapêutico , RNA Ribossômico 16S , Microtomografia por Raio-X/efeitos adversos , Periodontite/complicações , Modelos Animais de Doenças
3.
FASEB J ; 34(9): 12877-12893, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32757452

RESUMO

Anti-sclerostin monoclonal antibody romosozumab, a treatment for osteoporosis, reduced vertebral fracture risk and clinical fracture. Laser irradiation triggers various effects, including bio-stimulation, which can induce beneficial therapeutic effects and biological responses. Originally, we performed in vivo experiments to clarify the mechanism of better bone healing in laser-ablated bone. Here, we evaluated comprehensive and sequential gene expression in Er:YAG laser-ablated, bur-drilled, and nontreated control bones, and found laser irradiation suppressed Sost (coding protein: sclerostin) expression in the bone, possibly via stimulation of mechanotransducers. Surprisingly, bio-stimulation effect of laser suppressed Sost expression in the primary osteogenic cells. Decreased sclerostin expression after laser irradiation was also validated both in vivo and in vitro. In addition, sequential microarray analysis revealed that the gene expression pattern was clearly different at 24 hours after bone ablation between bur-drilled and laser-ablated bones. The Hippo signaling pathway was significantly enriched, whereas inflammation-related pathways were not affected at 6 hours after the laser ablation, indicating that laser irradiation caused mechanical stimulation. Only bur-drilled bone showed enriched inflammation-related gene sets and pathways at 24 hours, not in the laser-ablated bone. Our study suggests that laser irradiation may become a new treatment modality for osteoporosis, by inhibiting sclerostin expression without inducing inflammation.


Assuntos
Proteínas Morfogenéticas Ósseas/metabolismo , Fraturas Ósseas , Terapia a Laser , Osteoblastos/metabolismo , Osteogênese , Animais , Fraturas Ósseas/metabolismo , Fraturas Ósseas/terapia , Regulação da Expressão Gênica/efeitos da radiação , Marcadores Genéticos , Masculino , Osteoblastos/citologia , Ratos , Ratos Wistar
4.
Allergol Int ; 70(1): 55-60, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-32444308

RESUMO

BACKGROUND: An orosomucoid-like 3 (ORMDL3)/gasdermin B (GSDMB) gene locus on chromosome 17q is consistently associated with childhood-onset asthma, which is highly atopic. As some evidence suggests the relationship between asthma and allergic sensitization reflects asthma patient susceptibility to augmented IgE responses driven by common environmental allergens rather than an increased asthma risk after allergen exposure, we aimed to determine any relationships between this locus region and childhood-onset adult asthma with regard to serum total IgE levels or allergic sensitization. METHODS: We conducted a case-control association study using three independent Japanese populations (3869 total adults) and analyzed the ORs for association of rs7216389, an expression quantitative trait locus for ORMDL3/GSDMB, with adult asthma according to onset age. Additionally, associations between the rs7216389 genotype and total serum IgE levels or allergic sensitization was examined. RESULTS: Rs7216389 was associated with both childhood-onset adult asthma (OR for asthmatic patients afflicted at the age of 10 years or younger = 1.61, p = 0.00021) and asthmatic patients with higher levels of total serum IgE (OR for asthmatic patients with IgE ≥1000IU/mL = 1.55, p = 0.0033). In both healthy controls and in the combined healthy and asthmatic individuals, rs7216389 was correlated with increased total serum IgE levels (p < 0.0005), but not allergic sensitization (p > 0.1). CONCLUSIONS: ORMDL3/GSDMB is an important susceptibility gene for childhood-onset adult asthma in Japanese populations and this association is linked to elevated total serum IgE levels but not to allergic sensitization.


Assuntos
Asma/sangue , Asma/etiologia , Predisposição Genética para Doença , Genótipo , Imunoglobulina E/sangue , Proteínas de Membrana/genética , Proteínas de Neoplasias/genética , Adulto , Idade de Início , Alelos , Alérgenos/imunologia , Asma/diagnóstico , Estudos de Casos e Controles , Criança , Pré-Escolar , Humanos , Imunização , Imunoglobulina E/imunologia
5.
Clin Exp Allergy ; 50(11): 1223-1229, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-32615023

RESUMO

BACKGROUND: Adult-onset asthma and chronic obstructive pulmonary disease (COPD) are heterogeneous diseases caused by complex gene-environment interactions. A functional single nucleotide polymorphism of cadherin-related family member 3 (CDHR3), known as a receptor of rhinovirus-C, is associated with childhood-onset asthma especially in atopic individuals. OBJECTIVE: Here, we identified risk factors for adult-onset asthma and COPD, focusing on the impact of the CDHR3 variant in atopic individuals. METHODS: We conducted a longitudinal, retrospective, observational cohort study of 1523 healthy adults with baseline examinations at Tsukuba Medical Center Hospital in 2008 and retrospectively identified new-onset, physician-diagnosed asthma or COPD from 2009 to 2018. We assessed risk factors by the Cox regression analysis. The impact of CDHR3 variant rs6967330 was also examined in individuals with pre-existing atopy. RESULTS: Over 10 study years, 103 people developed airway diseases (79 asthma and 24 COPD; 52 females, average onset-age 55 years old, range 38-80). Higher body mass index (BMI) and lower forced expiratory volume in one second/forced vital capacity (FEV1 /FVC) ratio were significant risk factors (BMI: HR 1.072 [95% CI 1.005-1.14], P = .034; FEV1 /FVC ratio: HR 1.091 [1.044-1.14], P = .00011). Restriction to atopic individuals saw the A allele at rs6967330 and lower FEV1 /FVC ratio to associate with adult-onset disease (A allele: HR 2.89 [1.57-5.20], P = .00062; FEV1 /FVC ratio: HR 1.10 [1.04-1.17], P = .0010). CONCLUSION AND CLINICAL RELEVANCE: Genetic susceptibility to rhinovirus-C infection in atopic individuals is a risk factor for chronic airway diseases even in later life.


Assuntos
Asma/genética , Caderinas/genética , Infecções por Enterovirus/genética , Enterovirus/patogenicidade , Proteínas de Membrana/genética , Polimorfismo de Nucleotídeo Único , Doença Pulmonar Obstrutiva Crônica/genética , Adulto , Idade de Início , Idoso , Idoso de 80 Anos ou mais , Asma/diagnóstico , Asma/epidemiologia , Proteínas Relacionadas a Caderinas , Infecções por Enterovirus/diagnóstico , Infecções por Enterovirus/epidemiologia , Infecções por Enterovirus/virologia , Feminino , Estudos de Associação Genética , Predisposição Genética para Doença , Humanos , Japão/epidemiologia , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Fenótipo , Doença Pulmonar Obstrutiva Crônica/diagnóstico , Doença Pulmonar Obstrutiva Crônica/epidemiologia , Estudos Retrospectivos , Medição de Risco , Fatores de Risco
6.
J Allergy Clin Immunol ; 144(5): 1354-1363, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-31301374

RESUMO

BACKGROUND: Food allergy is a growing health problem worldwide because of its increasing prevalence, life-threatening potential, and shortage of effective preventive treatments. In an outbreak of wheat allergy in Japan, thousands of patients had allergic reactions to wheat after using soap containing hydrolyzed wheat protein (HWP). OBJECTIVES: The aim of the present study was to investigate genetic variation that can contribute to susceptibility to HWP allergy. METHODS: We conducted a genome-wide association study of HWP allergy in 452 cases and 2700 control subjects using 6.6 million genotyped or imputed single nucleotide polymorphisms. Replication was assessed by genotyping single nucleotide polymorphisms in independent samples comprising 45 patients with HWP allergy and 326 control subjects. RESULTS: Through the genome-wide association study, we identified significant associations with the class II HLA region on 6p21 (P = 2.16 × 10-24 for rs9271588 and P = 2.96 × 10-24 for HLA-DQα1 amino acid position 34) and with the RBFOX1 locus at 16p13 (rs74575857, P = 8.4 × 10-9). The associations were also confirmed in the replication data set. Both amino acid polymorphisms (HLA-DQß1 amino acid positions 13 and 26) located in the P4 binding pockets on the HLA-DQ molecule achieved the genome-wide significance level (P < 5.0 × 10-8). CONCLUSIONS: Our data provide the first demonstration of genetic risk for HWP allergy and show that this genetic risk is mainly represented by multiple combinations of HLA variants.


Assuntos
Genótipo , Antígenos HLA-DQ/genética , Fatores de Processamento de RNA/genética , Hipersensibilidade a Trigo/genética , Alérgenos/imunologia , Antígenos de Plantas/imunologia , Surtos de Doenças , Feminino , Frequência do Gene , Predisposição Genética para Doença , Estudo de Associação Genômica Ampla , Humanos , Hidrólise , Japão/epidemiologia , Masculino , Pessoa de Meia-Idade , Polimorfismo de Nucleotídeo Único , Triticum/imunologia , Hipersensibilidade a Trigo/epidemiologia
7.
BMC Med Genet ; 20(1): 58, 2019 04 02.
Artigo em Inglês | MEDLINE | ID: mdl-30940096

RESUMO

BACKGROUND: The chitinase-like protein YKL-40 plays a major role in inhibiting the inflammasome. Deregulation of inflammasome activation is emerging as a key modulator of pathologic airway inflammation in patients with asthma. We determined whether cis-expression quantitative trait loci (eQTLs) of the gene that encodes YKL-40, chitinase 3-like 1 (CHI3L1), are involved in the onset of asthma or in specific asthma phenotypes. METHODS: This case-control study, which was conducted at the University of Tsukuba, Japan, included a total of 2709 adults from the Tsukuba genome-wide association study (GWAS) cohort (734 healthy volunteers and 237 asthma patients), the Tsukuba replication cohort (375 healthy adult volunteers and 381 adult asthma patients), and the Hokkaido replication cohort (554 healthy adult volunteers and 428 adult asthma patients). Among 34 cis-eQTLs in CHI3L1 in the lung, rs946261 was associated with adult asthma in these Japanese cohorts. The genetic impact of rs946261 on asthma was also examined according to the age at onset and adult asthma clusters. RESULTS: In the Tsukuba GWAS cohort, the C allele at rs946261 was significantly associated with reduced expression of CHI3L1 mRNA in the lung and with development of asthma (odds ratio (OR) 1.27; P = 0.036). The association was also observed following analysis of the three Japanese cohorts (OR 1.16; P = 0.013). A stronger association was found with late-onset asthma that developed at 41 years of age or later (OR 1.24; 95% confidence interval (CI) 1.07-1.45; P = 0.0058) and with a specific asthma phenotype characterized by late onset, less atopy, and mild airflow obstruction (OR 1.29; 95% CI 1.03-1.61; P = 0.027). CONCLUSIONS: The genotype consisting of the cis-eQTL allele that reduces expression of CHI3L1 was specifically associated with late-onset adult asthma. Given the important role of YKL-40 in many pathophysiological processes, including cell growth, migration, chemotaxis, reorganization, and tissue remodeling, it may be involved in an important pathogenic role in the establishment of inflammation and remodeling in asthmatic airways. Our findings may indicate the presence of a specific endotype related to exaggerated activation of YKL-40 in the pathogenesis of late-onset adult asthma.


Assuntos
Idade de Início , Alelos , Asma/genética , Proteína 1 Semelhante à Quitinase-3/genética , Locos de Características Quantitativas , Adulto , Estudos de Casos e Controles , Estudos de Coortes , Estudo de Associação Genômica Ampla , Humanos , Japão , Fenótipo
8.
Allergol Int ; 68(1): 77-81, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30082152

RESUMO

BACKGROUND: TYRO3 is a member of the TAM (TYRO3, AXL, MERTK) receptor tyrosine kinase family and functions to limit type 2 immune responses implicated in allergic sensitization. Recent studies have shown that multiple intronic variants of TYRO3 were associated with asthma, implying that genetic variation could contribute to errant immune activation. We therefore hypothesized that expression quantitative trait loci (eQTLs) of the TYRO3 gene influence the development of allergic diseases (including asthma and allergic rhinitis) in Japanese populations. METHODS: We performed a candidate gene case-control association study of 8 eQTLs of TYRO3 on atopy, asthma, and allergic rhinitis using 1168 unrelated Japanese adults who had GWAS genotyping. We then examined the genetic impact of rs2297377 (TYRO3) on atopy and allergic rhinitis in 2 other independent Japanese populations. RESULTS: A meta-analysis of 3 Japanese populations (a total of 2403 Japanese adults) revealed that rs2297377 was associated with atopy and allergic rhinitis (OR = 1.29 and 1.31; P = 0.00041 and 0.0010, respectively). The risk allele at rs2297377 correlated with decreased expression of TYRO3 mRNA. The gene-gene interaction between HLA-DPB1 and TYRO3 was not significant with regard to sensitization. The estimated proportion of atopy and allergic rhinitis cases attributable to the risk genotype was 14% and 16%, respectively. CONCLUSIONS: Our study identified TYRO3 as an important susceptibility gene to atopy and allergic rhinitis in Japanese.


Assuntos
Predisposição Genética para Doença , Hipersensibilidade/genética , Receptores Proteína Tirosina Quinases/genética , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Povo Asiático/genética , Estudos de Casos e Controles , Feminino , Estudo de Associação Genômica Ampla , Genótipo , Humanos , Hipersensibilidade/epidemiologia , Pulmão/metabolismo , Masculino , Pessoa de Meia-Idade , Razão de Chances , Polimorfismo de Nucleotídeo Único , Locos de Características Quantitativas , Adulto Jovem
9.
Ann Allergy Asthma Immunol ; 118(2): 197-203, 2017 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-28034578

RESUMO

BACKGROUND: Sensitization to Staphylococcus aureus enterotoxin (SE) is a known risk factor for asthma susceptibility and severity. However, how SE sensitization is involved in asthma, particularly nonatopic asthma and/or late-onset asthma, remains uncertain. OBJECTIVE: To clarify the involvement of SE sensitization in nonatopic and/or late-onset asthma and its association with a polymorphism of the cysteinyl leukotriene receptor 1 gene (CysLTR1), which was examined because CysLT signaling is closely associated with late-onset eosinophilic asthma. METHODS: We assessed associations between sensitization to SE (A and/or B) and clinical indexes in 224 patients with asthma (mean age, 62.3 years; 171 women) from a cohort of the Kinki Hokuriku Airway Disease Conference, particularly those with nonatopic asthma (not sensitized to common aeroallergens) and/or late-onset asthma. Associations between SE sensitization and CysLTR1 polymorphism (rs2806489), a potential regulatory variant for atopic predisposition in women, were also assessed in a sex-stratified manner. RESULTS: A total of 105 patients (47%) with asthma were sensitized to SE. Among patients with nonatopic asthma (n = 67) or with late-onset asthma (n = 124), those sensitized to SE had significantly higher serum total IgE and periostin levels than those not sensitized. In nonatopic patients, a rapid decrease in forced expiratory volume in 1 second was associated with SE sensitization. In women with asthma, rs2806489 was associated with sensitization to SEB and age at asthma onset. CONCLUSION: SE sensitization contributes to TH2 inflammation in nonatopic and/or late-onset asthma. In women with asthma, the CysLTR1 variant might be associated with sensitization to SEB and age at asthma onset.


Assuntos
Asma/diagnóstico , Asma/etiologia , Enterotoxinas/imunologia , Variação Genética , Fenótipo , Receptores de Leucotrienos/genética , Staphylococcus aureus/imunologia , Idoso , Alelos , Asma/metabolismo , Biomarcadores , Estudos de Casos e Controles , Suscetibilidade a Doenças , Feminino , Frequência do Gene , Estudos de Associação Genética , Genótipo , Humanos , Imunização , Imunoglobulina E/sangue , Imunoglobulina E/imunologia , Contagem de Leucócitos , Masculino , Pessoa de Meia-Idade , Polimorfismo de Nucleotídeo Único , Regiões Promotoras Genéticas , Receptores de Leucotrienos/metabolismo , Testes de Função Respiratória , Fatores de Risco
10.
Allergol Int ; 66(4): 563-567, 2017 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-28318885

RESUMO

BACKGROUND: Recent studies have demonstrated that a coding SNP (rs6967330, Cys529→Tyr) in cadherin-related family member 3 (CDHR3), which was previously associated with wheezing illness and hospitalizations in infancy, could support efficient human rhinovirus C (RV-C) entry and replication. Here, we sought to examine the genetic contribution of this variant to the development of adult asthma. METHODS: We performed a candidate gene case-control association study of 2 independent Japanese populations (a total of 3366 adults). The odds ratios (ORs) for association of the A allele at rs6967330 with adult asthma were calculated according to age at onset of asthma. In addition, the effect of the CDHR3 genotype on the development of specific asthma phenotypes was examined. RESULTS: The A allele was associated with asthma (OR = 1.56; Mantel-Haenszel p = 0.0040) when the analysis was limited to patients with early-onset adult asthma. In addition, when the analysis was limited to atopic individuals, a stronger association of the CDHR3 variant with early-onset asthma was found, and interaction of the CDHR3 genotype with atopy was demonstrated. Finally, a significant association of this variant was specifically found with a phenotype of asthma characterized by atopy, early-onset, and lower lung function. CONCLUSIONS: Our study supports the concept that the CDHR3 variant is an important susceptibility factor for severe adult asthma in individuals who develop the disease in early life. The interaction between the CDHR3 variant and atopy indicates that genetic predisposition to early respiratory viral infection is combined with atopy in promoting asthma.


Assuntos
Asma/epidemiologia , Asma/genética , Caderinas/genética , Estudos de Associação Genética , Predisposição Genética para Doença , Genótipo , Proteínas de Membrana/genética , Adolescente , Adulto , Idade de Início , Idoso , Idoso de 80 Anos ou mais , Asma/diagnóstico , Proteínas Relacionadas a Caderinas , Estudos de Casos e Controles , Criança , Pré-Escolar , Feminino , Frequência do Gene , Variação Genética , Humanos , Lactente , Recém-Nascido , Japão/epidemiologia , Masculino , Pessoa de Meia-Idade , Razão de Chances , Fenótipo , Polimorfismo de Nucleotídeo Único , Vigilância da População , Testes de Função Respiratória , Fatores de Risco , Adulto Jovem
11.
Am J Respir Crit Care Med ; 192(11): 1345-54, 2015 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-26252367

RESUMO

RATIONALE: Pulmonary arterial hypertension (PAH) is a progressive fatal disease. Variable response and tolerability to PAH therapeutics suggests that genetic differences may influence outcomes. The endothelin pathway is central to pulmonary vascular function, and several polymorphisms and/or mutations in the genes coding for endothelin (ET)-1 and its receptors correlate with the clinical manifestations of other diseases. OBJECTIVES: To examine the interaction of ET-1 pathway polymorphisms and treatment responses of patients with PAH treated with ET receptor antagonists (ERAs). METHODS: A total of 1,198 patients with PAH were prospectively enrolled from 45 U.S. and Canadian pulmonary hypertension centers or retrospectively from global sites participating in the STRIDE (Sitaxsentan To Relieve Impaired Exercise) trials. Comprehensive objective measures including a 6-minute-walk test, Borg dyspnea score, functional class, and laboratory studies were completed at baseline, before the initiation of ERAs, and repeated serially. Single-nucleotide polymorphisms from ET-1 pathway candidate genes were selected from a completed genome-wide association study performed on the study cohort. MEASUREMENTS AND MAIN RESULTS: Patient efficacy outcomes were analyzed for a relationship between ET-1 pathway polymorphisms and clinical efficacy using predefined, composite positive and negative outcome measures in 715 European descent samples. A single-nucleotide polymorphism (rs11157866) in the G-protein alpha and gamma subunits gene was significantly associated, accounting for multiple testing, with a combined improvement in functional class and 6-minute-walk distance at 12 and 18 months and marginally significant at 24 months. CONCLUSIONS: ET-1 pathway associated polymorphisms may influence the clinical efficacy of ERA therapy for PAH. Further prospective studies are needed.


Assuntos
Anti-Hipertensivos/uso terapêutico , Antagonistas dos Receptores de Endotelina/uso terapêutico , Endotelina-1/genética , Hipertensão Pulmonar/tratamento farmacológico , Hipertensão Pulmonar/genética , Polimorfismo de Nucleotídeo Único/genética , Teste de Esforço , Tolerância ao Exercício , Feminino , Seguimentos , Estudo de Associação Genômica Ampla , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Estudos Retrospectivos , Resultado do Tratamento
12.
J Allergy Clin Immunol ; 136(3): 678-684.e4, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-25935106

RESUMO

BACKGROUND: Atopic dermatitis (AD) is a heterogeneous chronic inflammatory skin disease. Most AD during infancy resolves during childhood, but moderate-to-severe AD with allergic sensitization is more likely to persist into adulthood and more often occurs with other allergic diseases. OBJECTIVE: We sought to find susceptibility loci by performing the first genome-wide association study (GWAS) of AD in Korean children with recalcitrant AD, which was defined as moderate-to-severe AD with allergic sensitization. METHODS: Our study included 246 children with recalcitrant AD and 551 adult control subjects with a negative history of both allergic disease and allergic sensitization. DNA from these subjects was genotyped; sets of common single nucleotide polymorphisms (SNPs) were imputed and used in the GWAS after quality control checks. RESULTS: SNPs at a region on 13q21.31 were associated with recalcitrant AD at a genome-wide threshold of significance (P < 2.0 × 10(-8)). These associated SNPs are more than 1 Mb from the closest gene, protocadherin (PCDH)9. SNPs at 4 additional loci had P values of less than 1 × 10(-6), including SNPs at or near the neuroblastoma amplified sequence (NBAS; 2p24.3), thymus-expressed molecule involved in selection (THEMIS; 6q22.33), GATA3 (10p14), and S-phase cyclin A-associated protein in the ER (SCAPER; 15q24.3) genes. Further analysis of total serum IgE levels suggested 13q21.31 might be primarily an IgE locus, and analyses of published data demonstrated that SNPs at the 15q24.3 region are expression quantitative trait loci for 2 nearby genes, ISL2 and proline-serine-threonine phosphatase interacting protein 1 (PSTPIP1), in immune cells. CONCLUSION: Our GWAS of recalcitrant AD identified new susceptibility regions containing genes involved in epithelial cell function and immune dysregulation, 2 key features of AD, and potentially extend our understanding of their role in pathogenesis.


Assuntos
Dermatite Atópica/genética , Predisposição Genética para Doença , Imunoglobulina E/genética , Locos de Características Quantitativas , Proteínas Adaptadoras de Transdução de Sinal/genética , Proteínas Adaptadoras de Transdução de Sinal/imunologia , Adolescente , Adulto , Povo Asiático , Caderinas/genética , Caderinas/imunologia , Proteínas de Transporte/genética , Proteínas de Transporte/imunologia , Estudos de Casos e Controles , Criança , Pré-Escolar , Cromossomos Humanos Par 13 , Cromossomos Humanos Par 15 , Proteínas do Citoesqueleto/genética , Proteínas do Citoesqueleto/imunologia , Dermatite Atópica/etnologia , Dermatite Atópica/imunologia , Dermatite Atópica/patologia , Feminino , Fator de Transcrição GATA3/genética , Fator de Transcrição GATA3/imunologia , Estudo de Associação Genômica Ampla , Humanos , Imunoglobulina E/imunologia , Peptídeos e Proteínas de Sinalização Intracelular/genética , Peptídeos e Proteínas de Sinalização Intracelular/imunologia , Proteínas com Homeodomínio LIM/genética , Proteínas com Homeodomínio LIM/imunologia , Masculino , Proteínas de Neoplasias/genética , Proteínas de Neoplasias/imunologia , Proteínas do Tecido Nervoso/genética , Proteínas do Tecido Nervoso/imunologia , Polimorfismo de Nucleotídeo Único , Protocaderinas , Índice de Gravidade de Doença , Fatores de Transcrição/genética , Fatores de Transcrição/imunologia
14.
Cytokine ; 75(1): 181-5, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-25934649

RESUMO

Allergen-specific immunotherapy is the only treatment that can alter the natural course of allergic disease. We performed long-term sublingual immunotherapy (SLIT) for patients with seasonal allergic rhinitis caused by Japanese cedar pollen (SAR-JCP), screened molecules as candidate biomarkers, and investigated serum IL-17A and complement components 3a (C3a) and C5a in order to evaluate whether these molecules show changes correlated to symptom scores. In this study, we found that the long-term SLIT reduced the serum levels of IL-17A and C3a and C5a. The levels of C3a in the patients significantly decreased from year 1 compared with those at the baseline, and their levels of IL-17A significantly decreased from year 2 compared with those at baseline. The levels of IL-17A, C3a, and C5a at year 4 of SLIT were significantly lower than not only those at baseline, but also those at year 1. A significant positive correlation was found between the symptom medication scores and the levels of IL-17A at year 4. The symptom medication scores in the group in which IL-17A levels decreased at year 4 were significantly lower than those in the group without such a decrease. The serum level of IL-17A might prove useful as a biological parameter to ascertain the effectiveness of SLIT for patients with SAR-JCP. It is necessary to produce new therapeutics for non-responders in whom serum IL-17A levels are still higher against long-term SLIT.


Assuntos
Complemento C3a/imunologia , Complemento C5a/imunologia , Dessensibilização Imunológica/métodos , Interleucina-17/sangue , Pólen/imunologia , Rinite Alérgica Sazonal/terapia , Imunoterapia Sublingual , Administração Sublingual , Adulto , Idoso , Alérgenos/imunologia , Anafilatoxinas , Cryptomeria , Ensaio de Imunoadsorção Enzimática , Feminino , Regulação da Expressão Gênica , Humanos , Imunoterapia , Masculino , Pessoa de Meia-Idade , Rinite Alérgica/terapia , Rinite Alérgica Sazonal/imunologia , Fatores de Tempo
17.
N Engl J Med ; 365(13): 1173-83, 2011 Sep 29.
Artigo em Inglês | MEDLINE | ID: mdl-21991891

RESUMO

BACKGROUND: The response to treatment for asthma is characterized by wide interindividual variability, with a significant number of patients who have no response. We hypothesized that a genomewide association study would reveal novel pharmacogenetic determinants of the response to inhaled glucocorticoids. METHODS: We analyzed a small number of statistically powerful variants selected on the basis of a family-based screening algorithm from among 534,290 single-nucleotide polymorphisms (SNPs) to determine changes in lung function in response to inhaled glucocorticoids. A significant, replicated association was found, and we characterized its functional effects. RESULTS: We identified a significant pharmacogenetic association at SNP rs37972, replicated in four independent populations totaling 935 persons (P=0.0007), which maps to the glucocorticoid-induced transcript 1 gene (GLCCI1) and is in complete linkage disequilibrium (i.e., perfectly correlated) with rs37973. Both rs37972 and rs37973 are associated with decrements in GLCCI1 expression. In isolated cell systems, the rs37973 variant is associated with significantly decreased luciferase reporter activity. Pooled data from treatment trials indicate reduced lung function in response to inhaled glucocorticoids in subjects with the variant allele (P=0.0007 for pooled data). Overall, the mean (±SE) increase in forced expiratory volume in 1 second in the treated subjects who were homozygous for the mutant rs37973 allele was only about one third of that seen in similarly treated subjects who were homozygous for the wild-type allele (3.2±1.6% vs. 9.4±1.1%), and their risk of a poor response was significantly higher (odds ratio, 2.36; 95% confidence interval, 1.27 to 4.41), with genotype accounting for about 6.6% of overall inhaled glucocorticoid response variability. CONCLUSIONS: A functional GLCCI1 variant is associated with substantial decrements in the response to inhaled glucocorticoids in patients with asthma.


Assuntos
Asma/genética , Glucocorticoides/uso terapêutico , Polimorfismo de Nucleotídeo Único , Receptores de Glucocorticoides/genética , Adulto , Algoritmos , Asma/tratamento farmacológico , Criança , Feminino , Volume Expiratório Forçado/genética , Estudo de Associação Genômica Ampla , Genótipo , Humanos , Desequilíbrio de Ligação , Masculino , Receptores de Glucocorticoides/metabolismo
18.
PLoS Genet ; 7(6): e1002067, 2011 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-21738478

RESUMO

White blood cells (WBCs) mediate immune systems and consist of various subtypes with distinct roles. Elucidation of the mechanism that regulates the counts of the WBC subtypes would provide useful insights into both the etiology of the immune system and disease pathogenesis. In this study, we report results of genome-wide association studies (GWAS) and a replication study for the counts of the 5 main WBC subtypes (neutrophils, lymphocytes, monocytes, basophils, and eosinophils) using 14,792 Japanese subjects enrolled in the BioBank Japan Project. We identified 12 significantly associated loci that satisfied the genome-wide significance threshold of P<5.0×10(-8), of which 9 loci were novel (the CDK6 locus for the neutrophil count; the ITGA4, MLZE, STXBP6 loci, and the MHC region for the monocyte count; the SLC45A3-NUCKS1, GATA2, NAALAD2, ERG loci for the basophil count). We further evaluated associations in the identified loci using 15,600 subjects from Caucasian populations. These WBC subtype-related loci demonstrated a variety of patterns of pleiotropic associations within the WBC subtypes, or with total WBC count, platelet count, or red blood cell-related traits (n = 30,454), which suggests unique and common functional roles of these loci in the processes of hematopoiesis. This study should contribute to the understanding of the genetic backgrounds of the WBC subtypes and hematological traits.


Assuntos
Loci Gênicos/genética , Leucócitos/metabolismo , Povo Asiático/genética , Perfilação da Expressão Gênica , Regulação da Expressão Gênica , Estudo de Associação Genômica Ampla , Humanos , Polimorfismo de Nucleotídeo Único/genética , População Branca/genética
19.
PLoS Genet ; 7(7): e1002170, 2011 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-21814517

RESUMO

Asthma is a complex phenotype influenced by genetic and environmental factors. We conducted a genome-wide association study (GWAS) with 938 Japanese pediatric asthma patients and 2,376 controls. Single-nucleotide polymorphisms (SNPs) showing strong associations (P<1×10(-8)) in GWAS were further genotyped in an independent Japanese samples (818 cases and 1,032 controls) and in Korean samples (835 cases and 421 controls). SNP rs987870, located between HLA-DPA1 and HLA-DPB1, was consistently associated with pediatric asthma in 3 independent populations (P(combined) = 2.3×10(-10), odds ratio [OR] = 1.40). HLA-DP allele analysis showed that DPA1*0201 and DPB1*0901, which were in strong linkage disequilibrium, were strongly associated with pediatric asthma (DPA1*0201: P = 5.5×10(-10), OR = 1.52, and DPB1*0901: P = 2.0×10(-7), OR = 1.49). Our findings show that genetic variants in the HLA-DP locus are associated with the risk of pediatric asthma in Asian populations.


Assuntos
Povo Asiático/genética , Asma/genética , Predisposição Genética para Doença/genética , Antígenos HLA-DP/genética , Adolescente , Alelos , Estudos de Casos e Controles , Criança , Pré-Escolar , Feminino , Frequência do Gene , Estudo de Associação Genômica Ampla , Cadeias alfa de HLA-DP/genética , Cadeias beta de HLA-DP/genética , Haplótipos , Humanos , Masculino , Polimorfismo de Nucleotídeo Único/genética
20.
J Allergy Clin Immunol ; 132(2): 305-12.e3, 2013 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-23791506

RESUMO

BACKGROUND: Periostin, an extracellular matrix protein, contributes to subepithelial thickening in asthmatic airways, and its serum levels reflect airway eosinophilic inflammation. However, the relationship between periostin and the development of airflow limitation, a functional consequence of airway remodeling, remains unknown. OBJECTIVE: We aimed to determine the relationship between serum periostin levels and pulmonary function decline in asthmatic patients on inhaled corticosteroid (ICS) treatment. METHODS: Two hundred twenty-four asthmatic patients (average age, 62.3 years) treated with ICS for at least 4 years were enrolled. Annual changes in FEV1, from at least 1 year after the initiation of ICS treatment to the time of enrollment or later (average, 16.2 measurements over 8 years per individual), were assessed. At enrollment, clinical indices, biomarkers that included serum periostin, and periostin gene polymorphisms were examined. Associations between clinical indices or biomarkers and a decline in FEV1 of 30 mL or greater per year were analyzed. RESULTS: High serum periostin levels (≥ 95 ng/mL) at enrollment, the highest treatment step, higher ICS daily doses, a history of admission due to asthma exacerbation, comorbid or a history of sinusitis, and ex-smoking were associated with a decline in FEV1 of 30 mL or greater per year. Multivariate analysis showed that high serum periostin, the highest treatment step, and ex-smoking were independent risk factors for the decline. Polymorphisms of periostin gene were related to higher serum periostin levels (rs3829365) and a decline in FEV1 of 30 mL or greater per year (rs9603226). CONCLUSIONS: Serum periostin appears to be a useful biomarker for the development of airflow limitation in asthmatic patients on ICS.


Assuntos
Corticosteroides/uso terapêutico , Remodelação das Vias Aéreas/efeitos dos fármacos , Antiasmáticos/uso terapêutico , Asma/fisiopatologia , Moléculas de Adesão Celular/sangue , Regulação para Cima , Administração por Inalação , Corticosteroides/administração & dosagem , Idoso , Antiasmáticos/administração & dosagem , Asma/tratamento farmacológico , Asma/genética , Biomarcadores/metabolismo , Moléculas de Adesão Celular/genética , Feminino , Humanos , Pulmão/fisiopatologia , Masculino , Pessoa de Meia-Idade , Polimorfismo Genético , Testes de Função Respiratória
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