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1.
Clin Oncol (R Coll Radiol) ; 35(10): e601-e610, 2023 10.
Artigo em Inglês | MEDLINE | ID: mdl-37587000

RESUMO

AIMS: To evaluate computed tomography (CT) and 18F-fluorodeoxyglucose-positron emission tomography/computed tomography (18F-FDG-PET/CT) findings of invasive non-mucinous adenocarcinoma (INMA) of the lung as a predictor of histological tumour grade according to 2021 World Health Organization (WHO) classification. MATERIALS AND METHODS: This retrospective study included consecutive patients with surgically resected INMA who underwent both preoperative CT and 18F-FDG-PET/CT. A three-tiered tumour grade was performed based on the fifth edition of the WHO classification of lung tumours. CT imaging features and the maximum standardised uptake value (SUVmax) were compared among the three tumour grades. RESULTS: In total, 214 patients with INMA (median age 70 years; interquartile range 65-76 years; 123 men) were histologically categorised: 36 (17%) as grade 1, 102 (48%) as grade 2 and 76 (35%) as grade 3. Pure solid appearance was more frequent in grade 3 (83%) than in grades 1 (0%) and 2 (26%) (P < 0.001). The SUVmax of the entire tumour was higher in grade 3 than in grades 1 and 2 (P < 0.001). Multivariable analysis revealed that pure solid appearance (odds ratio = 94.0; P < 0.001), round/oval shape (odds ratio = 4.01; P = 0.001), spiculation (odds ratio = 2.13; P = 0.04), air bronchogram (odds ratio = 0.40; P = 0.03) and SUVmax (odds ratio = 1.45; P < 0.001) were significant predictors for grade 3 INMAs. CONCLUSION: Pure solid appearance, round/oval shape, spiculation, absence of air bronchogram and high SUVmax were associated with grade 3 INMAs. CT and 18F-FDG-PET/CT were potentially useful non-invasive imaging methods to predict the histological grade of INMAs.


Assuntos
Adenocarcinoma de Pulmão , Neoplasias Pulmonares , Masculino , Humanos , Idoso , Fluordesoxiglucose F18 , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Estudos Retrospectivos , Adenocarcinoma de Pulmão/diagnóstico por imagem , Adenocarcinoma de Pulmão/cirurgia , Tomografia Computadorizada por Raios X , Neoplasias Pulmonares/diagnóstico por imagem , Neoplasias Pulmonares/cirurgia , Biomarcadores , Organização Mundial da Saúde , Pulmão
2.
J Hosp Infect ; 134: 153-160, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-36813165

RESUMO

BACKGROUND: Hypervirulent Klebsiella pneumoniae (hvKp) infections confer notable morbidity and mortality. Differential diagnosis to determine whether the infections are caused by either the hvKp or classical K. pneumoniae (cKp) strain is particularly important for undertaking optimal clinical care and infection control efforts. AIM: To identify and assess the potential predictors of hvKp infections. METHODS: PubMed, Web of Science, and Cochrane Library databases were searched for all relevant publications from January 2000 to March 2022. The search terms included a combination of the following terms: (i) Klebsiella pneumoniae or K. pneumoniae and (ii) hypervirulent or hypervirulence. A meta-analysis of factors for which risk ratio was reported in three or more studies was conducted, and at least one statistically significant association was identified. FINDINGS: In this systematic review of 11 observational studies, a total of 1392 patients with K. pneumoniae infection and 596 (42.8%) with hvKp strains were evaluated. In the meta-analysis, diabetes mellitus and liver abscess (pooled risk ratio: 2.61 (95% confidence interval: 1.79-3.80) and 9.04 (2.58-31.72), respectively; all P < 0.001) were predictors of hvKp infections. CONCLUSION: For patients with a history of the abovementioned predictors, prudent management, including the search for multiple sites of infection and/or metastatic spread and the enforcement of an early and appropriate source control procedure, should be initiated in consideration of the potential presence of hvKp. We believe that this research highlights the urgent need for increasing clinical awareness of the management of hvKp infections.


Assuntos
Infecções por Klebsiella , Fatores de Virulência , Humanos , Virulência , Klebsiella pneumoniae , Infecções por Klebsiella/diagnóstico , Antibacterianos/uso terapêutico
3.
J Hosp Infect ; 111: 169-175, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-33516796

RESUMO

BACKGROUND: Stenotrophomonas maltophilia is a pathogen commonly associated with respiratory infection. However, the characteristics of pneumonia caused by S. maltophilia remain unknown. AIM: To evaluate the characteristics of and risk factors for S. maltophilia pneumonia. METHODS: A retrospective evaluation was undertaken of 2002 patients with sputum cultures positive for S. maltophilia between January 2010 and December 2019. Cases were excluded based on clinical information and laboratory results. Included cases were divided into two groups: the S. maltophilia pneumonia group (patients with pneumonia caused by S. maltophilia) and the non-S. maltophilia pneumonia group (patients with pneumonia caused by pathogens other than S. maltophilia). Patient characteristics, clinical data and Sequential Organ Failure Assessment (SOFA) scores were compared between the groups. FINDINGS: Eight and 91 patients were assigned to the S. maltophilia pneumonia and non-S. maltophilia pneumonia groups, respectively. The median age was significantly lower in the S. maltophilia pneumonia group than in the non-S. maltophilia pneumonia group (63.4 vs 73.1 years; P<0.01), and the SOFA score was significantly higher in the S. maltophilia pneumonia group (7.5 vs 3.0; P<0.01). Underlying malignancy and pre-administration of antipseudomonal ß-lactams and steroids were confirmed in seven of the eight cases in the S. maltophilia pneumonia group, suggesting an association with immunosuppression. CONCLUSIONS: Pneumonia due to S. maltophilia is a rare occurrence. Treatment for this pathogen should be considered in cases of pneumonia with: (1) predominance of S. maltophilia in sputum cultures; (2) pre-administration of broad-spectrum antibiotics; (3) immunodeficiency; and (4) a high SOFA score.


Assuntos
Infecções por Bactérias Gram-Negativas , Pneumonia Bacteriana , Stenotrophomonas maltophilia , Antibacterianos/uso terapêutico , Infecções por Bactérias Gram-Negativas/tratamento farmacológico , Humanos , Pneumonia Bacteriana/tratamento farmacológico , Estudos Retrospectivos , Stenotrophomonas maltophilia/isolamento & purificação
4.
Scand J Rheumatol ; 48(3): 218-224, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-30394816

RESUMO

OBJECTIVE: We aimed to describe the clinical characteristics and treatment course of hypertrophic pachymeningitis (HPM) in patients with antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV). METHODS: We retrospectively analysed 15 patients (11 men and four women). HPM was diagnosed based on thickening and enhancing of the brain and/or spinal dura mater on gadolinium-enhanced magnetic resonance imaging (MRI) T1 sequence. RESULTS: The median age at HPM onset was 60 years. Headache and cranial nerve impairment were observed in 14 and 10 patients, respectively. Otitis media and/or mastoiditis were found as complications of AAV in 11 patients. Fourteen patients were classified as having granulomatosis with polyangiitis (GPA). Single-positive myeloperoxidase-ANCA, single-positive proteinase 3-ANCA, and double-positive ANCA were identified in seven patients, five patients, and one patient, respectively. With MRI, thickening of the dura mater in the cranial fossa and tentorium cerebelli was found in 10 and eight patients, respectively. For remission induction, all patients were treated with corticosteroids, and immunosuppressants were added in 10 patients. Dura mater thickening partially improved in all patients, and cranial neuropathy completely remitted in eight patients. In a median follow-up of 43 months, four patients had HPM relapse and underwent reinduction therapy. All six patients treated with cyclophosphamide at initial therapy did not relapse. CONCLUSIONS: HPM was mostly associated with patients with GPA with otitis media and/or mastoiditis having either type of ANCA serology. Treatment with corticosteroids with or without immunosuppressants was effective. However, HPM relapse occasionally occurred, especially when cyclophosphamide was not used in initial treatment.


Assuntos
Vasculite Associada a Anticorpo Anticitoplasma de Neutrófilos , Encéfalo/diagnóstico por imagem , Dura-Máter , Granulomatose com Poliangiite , Imunossupressores/uso terapêutico , Meningite , Vasculite Associada a Anticorpo Anticitoplasma de Neutrófilos/complicações , Vasculite Associada a Anticorpo Anticitoplasma de Neutrófilos/diagnóstico , Anticorpos Anticitoplasma de Neutrófilos/sangue , Doenças dos Nervos Cranianos/diagnóstico , Doenças dos Nervos Cranianos/etiologia , Dura-Máter/diagnóstico por imagem , Dura-Máter/patologia , Feminino , Granulomatose com Poliangiite/complicações , Granulomatose com Poliangiite/diagnóstico , Humanos , Hipertrofia , Japão , Imageamento por Ressonância Magnética/métodos , Masculino , Meningite/diagnóstico , Meningite/tratamento farmacológico , Meningite/imunologia , Meningite/fisiopatologia , Pessoa de Meia-Idade , Indução de Remissão
5.
Clin Radiol ; 72(10): 905.e1-905.e5, 2017 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-28629605

RESUMO

AIM: To assess detailed computed tomography (CT) findings in patients with the recently described thrombocytopenia, anasarca, fever, reticulin fibrosis, and organomegaly (TAFRO) syndrome, in order to contribute to imaging interpretation in the challenging diagnosis of this disease. MATERIALS AND METHODS: The institutional review board approved this retrospective study and waived the need for informed consent. Eleven patients (six men, five women; mean age, 52.5 years) with confirmed TAFRO syndrome were included in this study. Chest-to-pelvis CT images were analysed for the presence of anasarca, organomegaly, bone lesions, and lung lesions. RESULTS: Anasarca was present in all patients and involved multiple cavities and tissues; pleural effusion and ascites were found in 100% of patients; pericardial effusion in 64%; periportal collar in 91%; gallbladder wall oedema in 78%; subcutaneous oedema in 91%; retroperitoneal oedema in 100%; and mesenteric oedema in 100%. Organomegaly involved multiple organs: hepatomegaly in 73%, splenomegaly in 82%, lymphadenopathy in 100%, and enlarged anterior mediastinum in 64% (solitary, well-circumscribed mass, 0%; infiltrative mass, 0%; non-mass-forming infiltrative lesion, 64%). Bone lesions were present in 91% patients and all bone lesions had ground-glass density with diffuse distribution. None of the patients had any lesions in their lungs. CONCLUSION: The present study revealed that the findings of anasarca, organomegaly, and diffuse bony ground-glass appearance were observed in detail on CT in patients with TAFRO syndrome. A "matted" appearance of the enlarged anterior mediastinum is the characteristic CT finding of TAFRO syndrome, and it is possible to diagnose TAFRO syndrome from the combination of several CT findings.


Assuntos
Hiperplasia do Linfonodo Gigante/diagnóstico por imagem , Edema/diagnóstico por imagem , Trombocitopenia/diagnóstico por imagem , Tomografia Computadorizada por Raios X , Adulto , Idoso , Hiperplasia do Linfonodo Gigante/patologia , Edema/complicações , Edema/patologia , Feminino , Febre/complicações , Febre/patologia , Fibrose/complicações , Fibrose/diagnóstico por imagem , Fibrose/patologia , Humanos , Masculino , Pessoa de Meia-Idade , Reprodutibilidade dos Testes , Reticulina , Estudos Retrospectivos , Síndrome , Trombocitopenia/complicações , Trombocitopenia/patologia
7.
Lupus ; 26(6): 656-660, 2017 May.
Artigo em Inglês | MEDLINE | ID: mdl-27831538

RESUMO

Objectives The selectivity index has been proposed in predicting the response to immunosuppressive therapy in nephrotic syndrome and other primary kidney disorders. The aim of this study was to elucidate the predictive value of the selectivity index for the treatment response and renal outcome in patients with lupus nephritis. Methods Forty-four patients with lupus nephritis with selectivity index available at the time of renal biopsy were divided into two groups according to the cut-off value of the selectivity index determined by a receiver operating characteristics curve to differentiate treatment responders from non-responders. The baseline characteristics, overall response rate and renal functional outcome were studied retrospectively, and compared between the two groups. Prognostic factors for achieving remission were identified. Results The cut-off value of the selectivity index was 0.167. The low selectivity index (<0.167) and the high selectivity index (≥0.167) group included 24 and 20 patients, respectively. The overall response rate was significantly higher (88% vs. 50%, P = 0.007) and the rate of progression to end-stage renal disease was lower in the low selectivity index group (0% vs. 15%, P = 0.049). More patients in the high selectivity index group had chronic lesions on renal biopsy ( P = 0.002). The selectivity index was the prognostic factor for achieving overall response based on a multivariate analysis ( P = 0.020). Conclusions A selectivity index ≥0.167 was a strong predictor for a poor treatment response and the presence of chronic lesions on renal biopsy. Further exploration with a larger cohort and longer follow-up period is warranted.


Assuntos
Imunossupressores/uso terapêutico , Nefrite Lúpica/tratamento farmacológico , Proteinúria/epidemiologia , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Curva ROC , Estudos Retrospectivos , Resultado do Tratamento
8.
Reprod Domest Anim ; 50(4): 696-703, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-26095590

RESUMO

A 14-month-old Japanese Black heifer was evaluated on Day 0 (D 0) for enlargement of the right ovary (RO). Transrectal ultrasonography (TRUS) revealed that the RO was markedly enlarged and multicystic, while the left ovary (LO) was small and inactive. The presumptive diagnosis was granulosa-theca cell tumour (GTCT), which was confirmed by markedly elevated plasma anti-Müllerian hormone (AMH) of 4.42 ng/ml. Therefore, ovariectomy of the RO was the treatment of choice. The heifer was checked by TRUS and blood sampling on D 42, D 63 and immediately before ovariectomy on D 85. On D 42, TRUS did not show marked changes in either ovary in comparison with D 0. However, on D 63, the RO had transformed into a single cyst, and on D 85, the LO had resumed cyclic activity. The RO was extracted on D 85 by hand-assisted laparoscopic ovariectomy to allow better control. Unexpectedly, histopathology revealed the lesion to be a fluid-filled cystic structure, with no neoplastic proliferation of follicular epithelium that would indicate GTCT. The wall of the cystic structure consisted of collagen fibres and a few degenerated granulosa cells. The retrospective hormonal analysis revealed that the AMH concentrations had markedly dropped on D 63 and 85, which coincided with resumption of cyclicity in the LO. These findings suggest that the GTCT had self-cured and transformed into a cyst-like structure. The heifer then received an oestrous synchronization regime on D 105, was artificially inseminated on D 115 and became pregnant.


Assuntos
Doenças dos Bovinos/patologia , Tumor de Células da Granulosa/veterinária , Neoplasias Ovarianas/veterinária , Tumor da Célula Tecal/veterinária , Animais , Hormônio Antimülleriano/sangue , Bovinos , Doenças dos Bovinos/cirurgia , Feminino , Tumor de Células da Granulosa/patologia , Tumor de Células da Granulosa/cirurgia , Laparoscopia Assistida com a Mão/veterinária , Hormônios/sangue , Neoplasias Ovarianas/patologia , Neoplasias Ovarianas/cirurgia , Ovariectomia/veterinária , Gravidez , Remissão Espontânea , Estudos Retrospectivos , Tumor da Célula Tecal/patologia , Tumor da Célula Tecal/cirurgia
9.
Leukemia ; 29(11): 2202-7, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26017033

RESUMO

Cancer stem cells can escape therapeutic killing by adopting a quiescent or dormant state. The reversibility of this condition provides the potential for later recurrence or relapse, potentially many years later. We describe the genomics of a rare case of childhood BCR-ABL1-positive, B-cell precursor acute lymphoblastic leukemia that relapsed, with an acute myeloblastic leukemia immunophenotype, 22 years after the initial diagnosis, sustained remission and presumed cure. The primary and relapsed leukemias shared the identical BCR-ABL1 fusion genomic sequence and two identical immunoglobulin gene rearrangements, indicating that the relapse was a derivative of the founding clone. All other mutational changes (single-nucleotide variant and copy number alterations) were distinct in diagnostic or relapse samples. These data provide unambiguous evidence that leukemia-propagating cells, most probably pre-leukemic stem cells, can remain covert and silent but potentially reactivatable for more than two decades.


Assuntos
Células-Tronco Neoplásicas/patologia , Leucemia-Linfoma Linfoblástico de Células Precursoras B/patologia , Pré-Escolar , Exoma , Proteínas de Fusão bcr-abl/genética , Dosagem de Genes , Rearranjo Gênico , Genes de Imunoglobulinas , Humanos , Fator de Transcrição Ikaros/genética , Masculino , Leucemia-Linfoma Linfoblástico de Células Precursoras B/genética
10.
Br J Cancer ; 112(6): 1121-33, 2015 Mar 17.
Artigo em Inglês | MEDLINE | ID: mdl-25688735

RESUMO

BACKGROUND: Bilateral Wilms tumours (BWTs) occur by germline mutation of various predisposing genes; one of which is WT1 whose abnormality was reported in 17-38% of BWTs in Caucasians, whereas no such studies have been conducted in East-Asians. Carriers with WT1 mutations are increasing because of improved survival. METHODS: Statuses of WT1 and IGF2 were examined in 45 BWTs from 31 patients with WT1 sequencing and SNP array-based genomic analyses. The penetrance rates were estimated in WT1-mutant familial Wilms tumours collected from the present and previous studies. RESULTS: We detected WT1 abnormalities in 25 (81%) of 31 patients and two families, which were included in the penetrance rate analysis of familial Wilms tumour. Of 35 BWTs from the 25 patients, 31 had small homozygous WT1 mutations and uniparental disomy of IGF2, while 4 had large 11p13 deletions with the retention of 11p heterozygosity. The penetrance rate was 100% if children inherited small WT1 mutations from their fathers, and 67% if inherited the mutations from their mothers, or inherited or had de novo 11p13 deletions irrespective of parental origin (P=0.057). CONCLUSIONS: The high incidence of WT1 abnormalities in Japanese BWTs sharply contrasts with the lower incidence in Caucasian counterparts, and the penetrance rates should be clarified for genetic counselling of survivors with WT1 mutations.


Assuntos
Mutação em Linhagem Germinativa , Neoplasias Renais/genética , Proteínas WT1/genética , Tumor de Wilms/genética , Povo Asiático/genética , Pré-Escolar , Feminino , Heterozigoto , Homozigoto , Humanos , Incidência , Lactente , Fator de Crescimento Insulin-Like II/genética , Masculino , Penetrância , Polimorfismo de Nucleotídeo Único
11.
Clin Exp Allergy ; 44(11): 1327-34, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-25251750

RESUMO

BACKGROUND: It is increasingly clear that asthma is not a single disease, but a disorder with vast heterogeneity in pathogenesis, severity, and treatment response. To date, 30 genomewide association studies (GWASs) of asthma have been performed, including by our group. However, most gene variants identified so far confer relatively small increments in risk and explain only a small proportion of familial clustering. OBJECTIVE: To identify additional genetic determinants of susceptibility to asthma using a selected Japanese population with reduced tobacco smoking exposure. METHODS: We performed a GWAS by genotyping a total of 480 098 single-nucleotide polymorphisms (SNPs) for a Japanese cohort consisting of 734 healthy controls and 240 patients with asthma who had smoked for no more than 10 pack-years. The SNP with the strongest association was genotyped in two other independent Japanese cohorts consisting of a total of 531 healthy controls and 418 patients with asthma who had smoked for no more than 10 pack-years. For the hyaluronan synthase 2 (HAS2) gene, we investigated SNP-gene associations using an expression quantitative trait loci (eQTL) database and also analysed its gene expression profiles in 13 different normal tissues. RESULTS: In the discovery GWAS, a SNP located upstream of HAS2, rs7846389, showed the strongest statistical significance (P = 1.43 × 10(-7) ). In the two independent replication cohorts, rs7846389 was consistently associated with asthma (nominal P = 0.0152 and 0.0478 in the first and second replication cohorts, respectively). In the meta-analysis, association of rs7846389 with susceptibility to asthma reached the level of genomewide significance (P = 7.92 × 10(-9) ). This variant was strongly correlated with HAS2 mRNA expression. The strongest expression of the gene was detected in the lung. CONCLUSIONS: Our study identified HAS2 as a novel candidate gene for susceptibility to adult asthma.


Assuntos
Povo Asiático/genética , Asma/genética , Predisposição Genética para Doença , Glucuronosiltransferase/genética , Adulto , Idoso , Asma/diagnóstico , Estudos de Casos e Controles , Cromossomos Humanos Par 8 , Enganação , Feminino , Expressão Gênica , Estudo de Associação Genômica Ampla , Genótipo , Humanos , Hialuronan Sintases , Japão , Desequilíbrio de Ligação , Masculino , Pessoa de Meia-Idade , Polimorfismo de Nucleotídeo Único , Locos de Características Quantitativas , RNA Mensageiro/genética , Fatores de Risco
12.
Mol Psychiatry ; 19(1): 55-62, 2014 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-23183491

RESUMO

Opioids, such as morphine and fentanyl, are widely used as effective analgesics for the treatment of acute and chronic pain. In addition, the opioid system has a key role in the rewarding effects of morphine, ethanol, cocaine and various other drugs. Although opioid sensitivity is well known to vary widely among individual subjects, several candidate genetic polymorphisms reported so far are not sufficient for fully understanding the wide range of interindividual differences in human opioid sensitivity. By conducting a multistage genome-wide association study (GWAS) in healthy subjects, we found that genetic polymorphisms within a linkage disequilibrium block that spans 2q33.3-2q34 were strongly associated with the requirements for postoperative opioid analgesics after painful cosmetic surgery. The C allele of the best candidate single-nucleotide polymorphism (SNP), rs2952768, was associated with more analgesic requirements, and consistent results were obtained in patients who underwent abdominal surgery. In addition, carriers of the C allele in this SNP exhibited less vulnerability to severe drug dependence in patients with methamphetamine dependence, alcohol dependence, and eating disorders and a lower 'Reward Dependence' score on a personality questionnaire in healthy subjects. Furthermore, the C/C genotype of this SNP was significantly associated with the elevated expression of a neighboring gene, CREB1. These results show that SNPs in this locus are the most potent genetic factors associated with human opioid sensitivity known to date, affecting both the efficacy of opioid analgesics and liability to severe substance dependence. Our findings provide valuable information for the personalized treatment of pain and drug dependence.


Assuntos
Analgésicos Opioides/administração & dosagem , Proteína de Ligação ao Elemento de Resposta ao AMP Cíclico/genética , Dor Pós-Operatória/tratamento farmacológico , Dor Pós-Operatória/genética , Polimorfismo de Nucleotídeo Único/genética , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Cromossomos Humanos Par 2/genética , Metilases de Modificação do DNA/genética , Feminino , Estudo de Associação Genômica Ampla , Genótipo , Humanos , Desequilíbrio de Ligação , Masculino , Pessoa de Meia-Idade , Medição da Dor , Dor Pós-Operatória/etiologia , Escalas de Graduação Psiquiátrica , Procedimentos de Cirurgia Plástica/efeitos adversos , Transtornos Relacionados ao Uso de Substâncias/genética , Adulto Jovem
13.
Plant Biol (Stuttg) ; 16(1): 258-63, 2014 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-23574545

RESUMO

Although most cyanobacterial cells contain prominent polyphosphate bodies in the central cytoplasmic area enclosed by the peripheral thylakoid membranes, their roles are not fully understood. Storing phosphate for nucleotide production might be one of their important roles in survival of the cells. As a step towards identifying a possible contribution of the polyphosphate bodies to DNA synthesis, the relationship between polyphosphate bodies and DNA throughout cell division cycle of Synechococcus elongatus PCC 7942 cells cultured under light/dark cycles was investigated with light and electron microscopy. During the dark period, the average size of polyphosphate bodies increased gradually without significant change in their number and distribution. However, during the light period, the number of polyphosphate bodies increased, while the size of each polyphosphate body decreased and cells elongated until the end of the light period, when most cells divided. The ratio of the content of polyphosphate bodies to cell length increased gradually during the dark period and decreased during the light period. Hoechst 33342-stained DNA appeared diffuse during the dark period, but in the light period it became condensed and eventually formed a wavy, rope-like structure prior to cell division. Close association between fibres containing DNA and polyphosphate bodies was demonstrated by TEM using DNA-specific staining and BrdU labelling. These regular coordinated changes of polyphosphate bodies and DNA shape during the cell division cycle, together with their intimate interaction, imply a role of polyphosphate bodies in supplying material for DNA.


Assuntos
Divisão Celular , DNA Bacteriano/metabolismo , Polifosfatos/metabolismo , Synechococcus/citologia , Synechococcus/genética , Synechococcus/metabolismo
14.
Clin Exp Rheumatol ; 32(2): 211-7, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-24321457

RESUMO

OBJECTIVES: Recent genome-wide association studies disclosed that several single nucleotide polymorphisms (SNPs), including tumour necrosis factor (TNF) receptor-associated factor 1 (TRAF1) (+16860A/G), are associated with the pathophysiology of rheumatoid arthritis (RA). We assessed the usefulness of TRAF1 genotyping as a genetic predictor of the response to anti-TNF treatment in Japanese RA patients. METHODS: TRAF1 (+16860A/G) was genotyped using the TaqMan SNP genotyping assay in 101 Japanese RA patients treated with anti-TNF drugs for >24 weeks. We retrospectively analysed the association between SNP and the clinical response to treatment. TRAF1 mRNA and protein expression was also evaluated in CD4+, CD8+, CD14+, or CD19+ cells from 25 healthy subjects using quantitative polymerase chain reaction and intracellular staining flow cytometry, respectively. RESULTS: No statistical difference in DAS28-ESR at baseline was observed between the patient groups with the AA, AG, or GG genotype. The GG genotype was more frequent in non-responders than in good or moderate responders [odds ratio (OR) 7.4, 95% confidence interval (CI) 1.5-37.5]. The non-responders possessed the G allele more frequently than the good or moderate responders (OR 3.5, 95% CI 1.4-9.0). TRAF1 protein expression increased significantly in CD14+ monocytes from healthy subjects with the GG genotype compared with that in subjects with the AA or AG genotype. CONCLUSIONS: TRAF1 (+16860A/G) may be useful for predicting the clinical response to anti-TNF treatment and may contribute to resistance to treatment in RA patients with the GG genotype by increasing the TRAF1 expression in circulating inflammatory cells.


Assuntos
Anticorpos Monoclonais Humanizados/farmacologia , Artrite Reumatoide , Fator 1 Associado a Receptor de TNF/genética , Fator de Necrose Tumoral alfa/antagonistas & inibidores , Adulto , Idoso , Antirreumáticos/farmacologia , Artrite Reumatoide/tratamento farmacológico , Artrite Reumatoide/genética , Povo Asiático/genética , Feminino , Técnicas de Genotipagem , Humanos , Japão , Masculino , Pessoa de Meia-Idade , Farmacogenética/métodos , Polimorfismo de Nucleotídeo Único , Valor Preditivo dos Testes , Estudos Retrospectivos , Resultado do Tratamento
15.
Cell Tissue Res ; 353(3): 563-73, 2013 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-23736379

RESUMO

Adhesion molecules are redistributed in rat uterine epithelial cells (UECs) during early pregnancy for endometrial receptivity and implantation. Intercellular adhesion molecule-2 (ICAM-2) is located as an oligomer on the basal plasma membrane of non-receptive UECs on day 1 of pregnancy and colocalizes with the lipid raft marker flotillin-2. At the time of implantation in rats and in ovariectomized rats primed with progesterone, ICAM-2 disappears from the basal plasma membrane and lipid rafts redistribute to the apical membrane. The loss of ICAM-2 might render UECs less adherent to the underlying basal lamina and more prone to apoptosis. Flotillin-2 in the apical plasma membrane at the time of implantation might provide an anchoring point for several adhesion molecules that are known to localize to this region at this time. We suggest that flotillin-2 is involved with adhesion between UECs and the implanting blastocyst, whereas ICAM-2 is associated with the ability for UECs to be removed at the time of implantation.


Assuntos
Moléculas de Adesão Celular/metabolismo , Implantação do Embrião/fisiologia , Células Epiteliais/metabolismo , Microdomínios da Membrana/metabolismo , Gravidez/metabolismo , Útero/metabolismo , Animais , Adesão Celular/fisiologia , Feminino , Proteínas de Membrana/metabolismo
16.
Phys Rev Lett ; 110(10): 107204, 2013 Mar 08.
Artigo em Inglês | MEDLINE | ID: mdl-23521291

RESUMO

We investigate the two-dimensional highly spin-polarized electron accumulation layers commonly appearing near the surface of n-type polar semiconductors BiTeX (X=I, Br, and Cl) by angular-resolved photoemission spectroscopy. Because of the polarity and the strong spin-orbit interaction built in the bulk atomic configurations, the quantized conduction-band subbands show giant Rashba-type spin splitting. The characteristic 2D confinement effect is clearly observed also in the valence bands down to the binding energy of 4 eV. The X-dependent Rashba spin-orbit coupling is directly estimated from the observed spin-split subbands, which roughly scales with the inverse of the band-gap size in BiTeX.

17.
Endoscopy ; 45(3): 195-201, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23299524

RESUMO

BACKGROUND AND STUDY AIMS: The aim of the current study was to assess the detection rate of the right adrenal gland and the diagnostic ability of endoscopic ultrasound (EUS) and fine-needle aspiration (FNA) for the diagnosis of adrenal metastasis in potentially resectable lung cancer. PATIENTS AND METHODS: This retrospective cohort study included a consecutive series of 150 patients undergoing EUS/EUS - FNA for staging of lung cancer. The detection rate of the right adrenal gland by EUS and the diagnostic accuracies of computed tomography (CT), positron emission tomography-CT (PET-CT), and EUS/EUS - FNA for the diagnosis of adrenal metastasis were evaluated. RESULTS: The right adrenal gland was visualized by EUS in 131 patients (87.3 %); the left adrenal gland was visualized in all patients. Findings suggestive of metastasis in either one of the adrenal glands or in both were observed in 6 patients (4.0 %) by CT, in 5 patients (3.3 %) by PET-CT, and in 11 patients (7.3 %) by EUS. EUS - FNA was performed simultaneously in the 11 patients, and in 4 patients the diagnosis of metastasis was established. The accuracy for the diagnosis of adrenal metastasis was 100 % for EUS/EUS - FNA, 96.0 % for CT, and 97.0 % for PET-CT (P = 0.1146). CONCLUSIONS: As well as the left adrenal gland, the right adrenal gland was also usually visible by EUS. EUS/EUS - FNA provided an accurate diagnosis of adrenal metastasis, although the prevalence of adrenal metastasis was relatively low in these patients with potentially resectable lung cancer.


Assuntos
Adenocarcinoma/diagnóstico , Neoplasias das Glândulas Suprarrenais/diagnóstico , Glândulas Suprarrenais/patologia , Aspiração por Agulha Fina Guiada por Ultrassom Endoscópico , Neoplasias Pulmonares/patologia , Carcinoma de Pequenas Células do Pulmão/diagnóstico , Adenocarcinoma/secundário , Neoplasias das Glândulas Suprarrenais/secundário , Glândulas Suprarrenais/diagnóstico por imagem , Adulto , Idoso , Idoso de 80 Anos ou mais , Endossonografia , Feminino , Humanos , Neoplasias Pulmonares/cirurgia , Masculino , Pessoa de Meia-Idade , Imagem Multimodal , Tomografia por Emissão de Pósitrons , Cuidados Pré-Operatórios , Estudos Retrospectivos , Carcinoma de Pequenas Células do Pulmão/secundário , Tomografia Computadorizada por Raios X
19.
J Neurol Sci ; 323(1-2): 128-33, 2012 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-22989610

RESUMO

AIM: The balance of excitation and inhibition of neurons and neuronal network is very important to perform complete neuronal function. Damage or loss of inhibitory γ-aminobutyric acid (GABA)-ergic interneuron is associated with impaired inhibitory control of cortical pyramidal neurons, leading to hyperexcitability and epileptogenesis. Ectopic neurons in the basal ganglia are to be one of the pathological features of epileptogenesis. In the present study, we investigated distribution of interneuron subtypes between neocortex and caudate nucleus. METHODS: We performed immunohistochemistry of GABA, glutamic acid decarboxylase (GAD), calretinin (CR), calbindin (CB), parvalbumin (PV) and neuropeptide. We used surgical materials of four focal cortical dysplasia (FCD) cases, having lesions of neocortex and caudate nucleus, and eight age-matched autopsy controls. RESULTS: The pathology showed three FCD IIa, containing dysmorphic neurons, and one FCD IIb, balloon cells. In the neocortex, the concentrations (each positive cell number/all cell numbers in the evaluated field) of GAD+, CR+ and CB+ cells were significantly lower in FCD than in controls. On the contrary, in the caudate nucleus those of CR+ and CB+ cells were significantly more in FCD than in controls. CONCLUSION: The interneuron imbalance between the neocortex and basal ganglia may affect the epileptogenesis of FCD.


Assuntos
Encefalopatias/patologia , Núcleo Caudado/patologia , Epilepsias Parciais/etiologia , Neurônios GABAérgicos/patologia , Interneurônios/patologia , Malformações do Desenvolvimento Cortical/patologia , Neocórtex/patologia , Adolescente , Encefalopatias/complicações , Encefalopatias/fisiopatologia , Encefalopatias/cirurgia , Calbindina 2 , Calbindinas , Estudos de Casos e Controles , Núcleo Caudado/cirurgia , Contagem de Células , Criança , Pré-Escolar , Epilepsias Parciais/fisiopatologia , Epilepsias Parciais/cirurgia , Epilepsia , Feminino , Neurônios GABAérgicos/química , Glutamato Descarboxilase/análise , Humanos , Lactente , Recém-Nascido , Interneurônios/química , Interneurônios/classificação , Imageamento por Ressonância Magnética , Masculino , Malformações do Desenvolvimento Cortical/complicações , Malformações do Desenvolvimento Cortical/fisiopatologia , Malformações do Desenvolvimento Cortical/cirurgia , Malformações do Desenvolvimento Cortical do Grupo I , Neocórtex/cirurgia , Proteínas do Tecido Nervoso/análise , Neuropeptídeos/análise , Parvalbuminas/análise , Proteína G de Ligação ao Cálcio S100/análise , Ácido gama-Aminobutírico/análise
20.
Kyobu Geka ; 65(8): 665-8, 2012 Jul.
Artigo em Japonês | MEDLINE | ID: mdl-22868425

RESUMO

Appropriate treatment strategy for congenital heart disease may be influenced by coexisting congenital anomalies of respiratory or digestive system. Typical congenital anomalies that coexist frequently with congenital heart diseases and have influence on treatment strategy of congenital heart disease include trecheoesophageal fistula, diaphragmatic hernia, and tracheal stenosis. In neonates with congenital heart disease and tracheoesophageal fistula (the fistula) should be immediately repaired after birth, followed by cardiac surgery to ameliorate heart failure or hypoxemia if feasible. In neonates with congenital heart disease and diaphragmatic hernia, diaphragmatic hernia repair is performed first unless heart disease is life threatening. In patients with congenital heart disease and tracheal stenosis, concomitant repair of heart disease and tracheal stenosis is a reasonable strategy in most patients. The treatment of patients with congenital heart disease and coexisting congenital anomalies of respiratory or digestive system remains challenging. We believe that properly organized management by multidiciplinary approach is essential for best achievable outcome.


Assuntos
Atresia Esofágica/complicações , Atresia Esofágica/cirurgia , Cardiopatias Congênitas/cirurgia , Hérnias Diafragmáticas Congênitas , Estenose Traqueal/congênito , Fístula Traqueoesofágica/complicações , Fístula Traqueoesofágica/cirurgia , Cardiopatias Congênitas/complicações , Hérnia Diafragmática/complicações , Hérnia Diafragmática/cirurgia , Humanos , Recém-Nascido , Estenose Traqueal/complicações , Estenose Traqueal/cirurgia
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