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Silver bismuth diselenide (AgBiSe2) has attracted much attention as an efficient thermoelectric material, owing to its intrinsically low lattice thermal conductivity. While samples synthesized using a solid-state reaction showed n-type conductivity and their dimensionless figure of merit (ZT) reached â¼1 by electron doping, theoretical calculations predicted that a remarkably high thermoelectric performance can be achieved in p-type AgBiSe2. In this paper, we present the effect of Te substitution on the crystal structure and thermoelectric properties of AgBiSe2, expecting p-type conductivity due to the shallowing of the energy potential of the valence band. We found that all AgBiSe2-xTex (x = 0-0.8) prepared using a solid-state reaction exhibits n-type conductivity from 300 to 750 K. The room-temperature lattice thermal conductivity decreased to as low as 0.3 W m-1 K-1 by Te substitution, which was qualitatively described using the point defect scattering model for the solid solution. We show that ZT reaches â¼0.6 for x = 0.8 at a broad range of temperatures, from 550 to 750 K, due to the increased power factor, although the carrier concentration has not been optimized yet.
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Cathelicidin peptide LL-37 plays an important role in the early host response against invading pathogens via its broad-spectrum anti-microbial activity. In this study, we investigated LL-37 expression in the inflamed mucosa of inflammatory bowel disease (IBD) patients. Furthermore, the regulatory mechanism of LL-37 induction was investigated in human colonic subepithelial myofibroblasts (SEMFs). LL-37 mRNA expression and protein secretion were analysed using real-time polymerase chain reaction and enzyme-linked immunosorbent assay, respectively. Intracellular signalling pathways were analysed using immunoblotting and specific small interference RNA (siRNA). The expression of LL-37 mRNA was increased significantly in the inflamed mucosa of ulcerative colitis and Crohn's disease. The Toll-like receptor (TLR)-3 ligand, polyinosinic-polycytidylic acid (poly(I:C), induced LL-37 mRNA expression and stimulated LL-37 secretion in colonic SEMFs. The transfection of siRNAs specific for intracellular signalling proteins [Toll/IL-1R domain-containing adaptor-inducing interferon (IFN) (TRIF), tumour necrosis factor receptor-associated factor (TRAF)6, transforming growth factor ß-activated kinase (TAK)1] suppressed the poly(I:C)-induced LL-37 mRNA expression significantly. Poly(I:C)-induced phosphorylation of mitogen-activated protein kinases (MAPKs) and activated nuclear factor kappa B (NF-κB) and activating factor protein (AP)-1. siRNAs specific for NF-κB and c-Jun inhibited poly(I:C)-induced LL-37 mRNA expression. LL-37 suppressed lipopolysaccharide (LPS)-induced interleukin (IL)-6 and IL-8 expression significantly in colonic SEMFs. The expression of LL-37 was up-regulated in the inflamed mucosa of IBD patients. LL-37 was induced by TLR-3 stimulation and exhibited an anti-microbial effect via interaction with lipopolysaccharide (LPS).
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Peptídeos Catiônicos Antimicrobianos/genética , Regulação da Expressão Gênica , Doenças Inflamatórias Intestinais/genética , Proteínas Adaptadoras de Transporte Vesicular/metabolismo , Peptídeos Catiônicos Antimicrobianos/metabolismo , Biomarcadores , Colo , Citocinas/metabolismo , Humanos , Imuno-Histoquímica , Mediadores da Inflamação/metabolismo , Doenças Inflamatórias Intestinais/imunologia , Doenças Inflamatórias Intestinais/metabolismo , Mucosa Intestinal/imunologia , Mucosa Intestinal/metabolismo , Mucosa Intestinal/patologia , Peptídeos e Proteínas de Sinalização Intracelular , MAP Quinase Quinase Quinases/metabolismo , Miofibroblastos/metabolismo , Poli I-C/imunologia , Transdução de Sinais , Fator 6 Associado a Receptor de TNF/metabolismo , CatelicidinasRESUMO
The relationship between the laser power and the three-dimensional distribution of boron (B) in silicon (Si) measured by laser-assisted atom probe tomography (APT) is investigated. The ultraviolet laser employed in this study has a fixed wavelength of 355nm. The measured distributions are almost uniform and homogeneous when using low laser power, while clear B accumulation at the low-index pole of single-crystalline Si and segregation along the grain boundaries in polycrystalline Si are observed when using high laser power (100pJ). These effects are thought to be caused by the surface migration of atoms, which is promoted by high laser power. Therefore, for ensuring a high-fidelity APT measurement of the B distribution in Si, high laser power is not recommended.
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Bussulfano/administração & dosagem , Doenças Hematológicas , Melfalan/administração & dosagem , Condicionamento Pré-Transplante , Vidarabina/análogos & derivados , Adulto , Idoso , Transplante de Células-Tronco de Sangue do Cordão Umbilical , Intervalo Livre de Doença , Feminino , Doenças Hematológicas/mortalidade , Doenças Hematológicas/terapia , Humanos , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Taxa de Sobrevida , Vidarabina/administração & dosagem , Irradiação Corporal TotalRESUMO
OBJECTIVES: Despite a documented clinical need, no patient reported outcome (PRO) symptom measure meeting current regulatory requirements for clinically relevant end points is available for the evaluation of treatment benefit in diarrhea-predominant IBS (IBS-D). METHODS: Patients (N=113) with IBS-D participated in five study phases: (1) eight concept elicitation focus groups (N=34), from which a 17-item IBS-D Daily Symptom Diary and four-item IBS-D Symptom Event Log (Diary and Event Log) were developed; (2) one-on-one cognitive interviews (N=11) to assess the instrument's comprehensiveness, understandability, appropriateness, and readability; (3) four data triangulation focus groups (N=32) to confirm the concepts elicited; (4) two hybrid (concept elicitation and cognitive interview) focus groups (N=16); and (5) two iterative sets of one-on-one cognitive interviews (N=20) to further clarify the symptoms of IBS-D and debrief a revised seven-item Diary and four-item Event Log. RESULTS: Of thirty-six concepts initially identified, 22 were excluded because they were not saturated, not clinically relevant, not critical symptoms of IBS-D, considered upper GI symptoms, or too broad or vaguely defined. The remaining concepts were diarrhea, immediate need (urgency), bloating/pressure, frequency of bowel movements, cramps, abdominal/stomach pain, gas, completely emptied bowels/incomplete evacuation, accidents, bubbling in intestines (bowel sounds), rectal burning, stool consistency, rectal spasm, and pain while wiping. The final instrument included a daily diary with separate items for abdominal and stomach pain and an event log with four items completed after each bowel movement as follows: (1) a record of the bowel movement/event and an assessment of (2) severity of immediacy of need/bowel urgency, (3) incomplete evacuation, and (4) stool consistency (evaluated using the newly developed Astellas Stool Form Scale). Based on rounds of interviews and clinical input, items considered secondary or nonspecific to IBS-D (rectal burning, bubbling in intestines, spasms, and pain while wiping) were excluded. CONCLUSIONS: The IBS-D Symptom Diary and Event Log represent a rigorously developed PRO instrument for the measurement of the IBS-D symptom experience from the perspective of the patient. Its content validity has been supported, and future work should evaluate the instrument's psychometric properties.
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AIMS: The oral administration of a compost produced by the fermentation of marine animals with thermophiles confers health benefits for fish and pigs. This study aimed to isolate the beneficial bacteria from this compost that would modulate the physiological conditions of host animals. METHODS AND RESULTS: The compost extract was orally administrated to germ-free mice for 21 days, and thereafter, the culturable bacterial population within the caeca was surveyed. Sequence analyses of the 16S rRNA gene from the two predominant thermophilic isolates revealed organisms that were closely related to Bacillus thermoamylovorans and Bacillus coagulans. These bacteria could grow at 37°C, but more abundantly at 50-55°C, and they were minor components of the original compost extract. When an individual bacterial strain or a mixture of strains was administered to the conventionally maintained mice, their levels of faecal immunoglobulin A, an indicator of the gut immune response, were markedly raised. In addition, their feeding efficiency also changed among the tested mouse groups. CONCLUSIONS: These two kinds of thermophilic bacterial species, isolated from the caeca after compost ingestion to the germ-free mice, are candidate probiotics that could function in the mammalian gut. SIGNIFICANCE AND IMPACT OF THE STUDY: This study revealed that the compost used in agriculture can contain potential probiotic thermophiles.
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Bactérias/isolamento & purificação , Ceco/microbiologia , Probióticos , Microbiologia do Solo , Animais , Bacillus/genética , Bacillus/isolamento & purificação , Bactérias/genética , Fezes/microbiologia , Fermentação , Vida Livre de Germes , Masculino , Camundongos , Camundongos Endogâmicos BALB C , RNA Ribossômico 16S/genética , SoloRESUMO
High incidences of human herpesvirus (HHV)-6 encephalitis have recently been reported from several Japanese SCT centers. To evaluate the effect of low-dose foscarnet (PFA) in preventing HHV-6 infection among recipients of unrelated BM or cord blood (CB), we examined consecutive cohorts without prophylaxis against HHV-6 (cohort 1, n=51) and with PFA prophylaxis (cohort 2, PFA 50 mg/kg/day for 10 days after engraftment, n=67). Plasma real-time PCR assay was performed weekly. High-level reactivation defined as HHV-6 DNA > or =10(4) copies/mL by day 70 was the primary endpoint. No significant reduction of high-level reactivation was seen in cohort 2 (19.4%) compared with cohort 1 (33.8%, P=0.095). A trend was identified toward fewer high-level HHV-6 reactivations in cohort 2 among recipients of unrelated BM (P=0.067), but no difference in incidence was observed among CB recipients (P=0.75). Breakthrough HHV-6 encephalitis occurred following PFA prophylaxis in three patients, and incidence of HHV-6 encephalitis did not differ between cohort 1 (9.9%) and cohort 2 (4.5%, P=0.24). In conclusion, 50 mg/kg/day of PFA does not effectively suppress HHV-6 reactivation and cannot prevent all cases of HHV-6 encephalitis. To effectively prevent HHV-6 encephalitis, alternative approaches based on the pathogenesis of HHV-6 encephalitis will probably be required.
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Antivirais/uso terapêutico , Encefalite Viral/tratamento farmacológico , Foscarnet/uso terapêutico , Transplante de Células-Tronco Hematopoéticas/efeitos adversos , Transplante de Células-Tronco Hematopoéticas/métodos , Herpesvirus Humano 6/fisiologia , Infecções por Roseolovirus/tratamento farmacológico , Adolescente , Adulto , Idoso , Estudos de Coortes , Encefalite Viral/etiologia , Encefalite Viral/prevenção & controle , Encefalite Viral/virologia , Humanos , Incidência , Pessoa de Meia-Idade , Infecções por Roseolovirus/etiologia , Infecções por Roseolovirus/prevenção & controle , Infecções por Roseolovirus/virologia , Transplante Homólogo , Ativação Viral/efeitos dos fármacos , Adulto JovemRESUMO
A tapered parallel plate waveguide was developed for frequency up-conversion experiments in the terahertz (THz) region by flash ionization. The element at the plasma-source-wave interaction area determines the conversion efficiency. It causes THz pulses to converge to a narrow plate separation, which is smaller than the wavelength. The waveguide exhibited good performance for transmitting p-polarized THz pulses in a 50 µm separation, making it suitable for flash ionization experiments.
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Equipamentos e Provisões para Radiação , Lasers , Modelos Teóricos , Gases em PlasmaRESUMO
BACKGROUND: Pneumonia caused by Stenotrophomonas maltophilia is rare, but can be lethal in severely immunocompromised patients. However, its clinical course remains unclear. PATIENTS AND METHODS: Patients with pneumonia caused by S. maltophilia in Toranomon Hospital (890 beds, Tokyo, Japan) were reviewed retrospectively between April 2006 and March 2010. RESULTS: During the study period, 10 cases of S. maltophilia pneumonia were identified. Seven patients had acute myeloid leukemia, 2 had myelodysplastic syndrome, and 1 had malignant lymphoma. All patients developed symptoms after allogeneic hematopoietic stem cell transplantation (HSCT). Five patients received first cord blood transplantation (CBT), 4 patients received second CBT, and 1 patient received first peripheral blood stem cell transplantation (PBSCT). The overall incidence of S. maltophilia pneumonia among 508 patients who received HSCT during the period was 2.0%. The incidence was 0% (0/95) in patients after bone marrow transplantation, 0.8% (1/133) after PBSCT, and 3.2% (9/279) after CBT. Pneumonia developed a median of 13.5 days (range, 6-40) after transplantation. At onset, the median white blood cell count was 10/µL (range, 10-1900), and the median neutrophil count was 0/µL (range, 0-1720). In all patients, S. maltophilia bacteremia developed with bloody sputum or hemoptysis. The 28-day mortality rate was 100%; the median survival after onset of pneumonia was 2 days (range, 1-10). CONCLUSIONS: Hemorrhagic S. maltophilia pneumonia rapidly progresses and is fatal in patients with hematologic malignancy. Attention should be particularly paid to the neutropenic phase early after HSCT or prolonged neutropenia due to engraftment failure. A prompt trimethoprim-sulfamethoxazole-based multidrug combination regimen should be considered to rescue suspected cases of S. maltophilia pneumonia in these severely immunosuppressed patients.
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Neoplasias Hematológicas/complicações , Hemorragia/etiologia , Pneumonia Bacteriana/microbiologia , Pneumonia Bacteriana/mortalidade , Stenotrophomonas maltophilia/isolamento & purificação , Adulto , Antibacterianos/uso terapêutico , Sangue/microbiologia , Meios de Cultura , Progressão da Doença , Feminino , Infecções por Bactérias Gram-Negativas/complicações , Infecções por Bactérias Gram-Negativas/tratamento farmacológico , Infecções por Bactérias Gram-Negativas/microbiologia , Infecções por Bactérias Gram-Negativas/mortalidade , Transplante de Células-Tronco Hematopoéticas/efeitos adversos , Humanos , Hospedeiro Imunocomprometido , Incidência , Japão/epidemiologia , Masculino , Pessoa de Meia-Idade , Pneumonia Bacteriana/complicações , Pneumonia Bacteriana/tratamento farmacológico , Fatores de Tempo , Combinação Trimetoprima e Sulfametoxazol/uso terapêuticoRESUMO
OBJECTIVE: To characterize an irregular capillary-like structure in the vascular network of eyes with polypoidal choroidal vasculopathy (PCV), and to determine whether its presence after photodynamic therapy (PDT) can be used to predict the clinical course of PCV. METHODS: We reviewed the clinical records of 29 eyes of 29 patients with PCV, who underwent PDT and confocal retinal angiographic examinations every 3 months. The images obtained before the PDT were compared with those after the PDT. The correlations between angiography findings and recurrences were evaluated. RESULTS: An area of fine, densely packed capillary-like vessels, named the fine vascular network, was identified within the polypoidal vascular network in 25 of 29 cases at the initial examination. The fine vascular network regressed in 23 cases (92%) after the first PDT. Thereafter, the fine vascular network remained or enlarged in 19 eyes, and 17 (84.5%) of these eyes had a recurrence of the polypoidal lesions or had exudative changes. In contrast, recurrences were found in only 2 of 10 (20%) eyes, whose fine network had regressed without a subsequent enlargement (P<0.001 compared with the former group). CONCLUSIONS: A fine irregular vascular network is present in the majority of eyes with PCV before PDT. Its presence or expansion after PDT was significantly associated with a recurrence of PCV. Thus, we recommend that this network be monitored after treatment to determine whether a polypoidal vascular network will recur.
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Doenças da Coroide/patologia , Corioide/irrigação sanguínea , Doenças Vasculares Periféricas/patologia , Fotoquimioterapia , Capilares/patologia , Doenças da Coroide/tratamento farmacológico , Neovascularização de Coroide/tratamento farmacológico , Neovascularização de Coroide/patologia , Angiofluoresceinografia , Humanos , Doenças Vasculares Periféricas/tratamento farmacológico , RecidivaAssuntos
Proteinose Alveolar Pulmonar/diagnóstico , Proteinose Alveolar Pulmonar/mortalidade , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Criança , Comorbidade , Dispneia/epidemiologia , Feminino , Doenças Hematológicas/epidemiologia , Humanos , Japão , Masculino , Pessoa de Meia-Idade , Oxigênio/sangue , Prognóstico , Proteinose Alveolar Pulmonar/patologia , Testes de Função Respiratória , Fatores Sexuais , Fumar/epidemiologia , Adulto JovemAssuntos
Adulto , Feminino , Humanos , Suicídio/prevenção & controle , Suicídio/estatística & dados numéricos , França , JapãoAssuntos
Prevenção do Suicídio , Suicídio/estatística & dados numéricos , Adulto , Feminino , França , Humanos , JapãoRESUMO
OBJECTIVE: Psychotic disorders are a significant risk factor for suicide, especially among young people. Psychotic-like experiences (PLEs) in the general population may share an etiological background with psychotic disorders. Therefore, the present study examined the association between PLEs and risk of suicide in a community sample of adolescents. METHOD: Psychotic-like experiences, suicidal feelings, and self-harm behaviors were studied using a self-report questionnaire administered to 5073 Japanese adolescents. Depression and anxiety were evaluated using the 12-item General Health Questionnaire (GHQ). RESULTS: The presence of PLEs was significantly associated with suicidal feelings (OR = 3.1, 95% CI = 2.2-4.5) and deliberate self-harm behaviors (OR = 3.1, 95% CI = 2.0-4.8) after controlling for the effects of age, gender, GHQ-12 score, victimization, and substance use. Suicidal feelings and behaviors were more prevalent in subjects with a greater number of PLEs. CONCLUSION: Psychotic-like experiences may increase the risk of suicidal problems among adolescents.
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Ansiedade/psicologia , Depressão/psicologia , Transtornos Psicóticos/psicologia , Comportamento Autodestrutivo/psicologia , Suicídio/psicologia , Adolescente , Ansiedade/epidemiologia , Criança , Vítimas de Crime/psicologia , Depressão/epidemiologia , Feminino , Humanos , Japão , Masculino , Transtornos Psicóticos/epidemiologia , Fatores de Risco , Comportamento Autodestrutivo/epidemiologia , Transtornos Relacionados ao Uso de Substâncias/psicologiaRESUMO
INTRODUCTION: Bow hunter's syndrome is a unique clinical entity caused by mechanical occlusion of the vertebral artery on head rotation. Although it is usually treated by direct surgical intervention, we report successful treatment using endovascular stent placement for contralateral vertebral artery stenosis. CASE DESCRIPTION: A 56-year-old man presented with repeated vertigo and loss of consciousness caused by turning his head to the left. Right vertebral angiogram showed no abnormalities with the head in the neutral position. However, with the head rotated 60 degrees to the left, the right vertebral artery was completely occluded at the C1-2 level. A three-dimensional angiogram with bone window clearly demonstrated vertebral artery compression at the C1-2 level by the bony structure. The left subclavian angiogram revealed severe stenosis at the origin of the left vertebral artery. Left vertebral artery angioplasty followed by stent placement was successfully performed under local anesthesia. The patient showed an uneventful postoperative course and his preoperative symptoms disappeared. At 6 months postoperatively, a left subclavian angiogram showed good patency of the stented left vertebral artery and the patient showed no recurrent symptoms. CONCLUSION: Vertebral artery stenting is a useful and less invasive option in the treatment of bow hunter's syndrome in the setting of contralateral vertebral artery stenosis.
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Angioplastia/métodos , Stents , Insuficiência Vertebrobasilar/patologia , Insuficiência Vertebrobasilar/cirurgia , Angioplastia/instrumentação , Angiografia Cerebral , Lateralidade Funcional/fisiologia , Movimentos da Cabeça/fisiologia , Humanos , Masculino , Pessoa de Meia-Idade , Amplitude de Movimento Articular/fisiologia , Rotação/efeitos adversos , Resultado do Tratamento , Inconsciência/etiologia , Artéria Vertebral/diagnóstico por imagem , Artéria Vertebral/patologia , Artéria Vertebral/cirurgia , Insuficiência Vertebrobasilar/diagnóstico por imagem , Insuficiência Vertebrobasilar/etiologia , Insuficiência Vertebrobasilar/fisiopatologia , Vertigem/etiologiaRESUMO
The dopant distributions in an n-type metal-oxide-semiconductor field effect transistor (MOSFET) structure were analyzed by atom probe tomography. The dopant distributions of As, P, and B atoms in a MOSFET structure (gate, gate oxide, channel, source/drain extension, and halo) were obtained. P atoms were segregated at the interface between the poly-Si gate and the gate oxide, and on the grain boundaries of the poly-Si gate, which had an elongated grain structure along the gate height direction. The concentration of B atoms was enriched near the edge of the source/drain extension where the As atoms were implanted.
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BACKGROUND AND OBJECTIVE: To investigate the physico-chemical properties of hepatitis E virus (HEV) with regard to inactivation/removal, we have studied four isolates with respect to sensitivity to heat during liquid/dry-heating as well as removal by nanofiltration. MATERIALS AND METHODS: Hepatitis E virus in an albumin solution or phosphate-buffered saline (PBS) was liquid-heated at 60 degrees C for a preset time. HEV in a freeze-dried fibrinogen containing stabilizers was also dry-heated at 60 or 80 degrees C for a preset time. In addition, to clarify the removal of HEV, the purified virus in PBS was filtered using several types of virus-removal filter (nanofilters) that have different pore sizes. HEV infectivity or genome equivalents before and after the treatments were assayed by a semiquantitative cell-based infectivity assay or quantitative polymerase chain reaction assay, respectively. RESULTS: Hepatitis E virus isolates in albumin solutions were inactivated slowly at 60 degrees C for 5 h and the resultant log reduction factor (LRF) was from 1.0 to > or = 2.2, whereas the virus in PBS was inactivated quickly to below the detection limit and the LRF was > or = 2.4 to > or = 3.7. The virus in a freeze dried fibrinogen containing trisodium citrate dihydrate and l-arginine hydrochloride as stabilizers was inactivated slowly and the LRF was 2.0 and 3.0, respectively, of the 72 h at 60 degrees C, but inactivated to below the detection limit within 24 h at 80 degrees C with an LRF of > or = 4.0. The virus in PBS was also confirmed as to be approximately 35 nm in diameter by nanofiltration. These results are useful for evaluating viral safety against HEV contamination in blood products. CONCLUSION: The sensitivity of HEV to heat was shown to vary greatly depending on the heating conditions. On the other hand, the HEV particles were completely removed using 20-nm nanofilters. However, each inactivation/removal step should be carefully evaluated with respect to the HEV inactivation/removal capacity, which may be influenced by processing conditions such as the stabilizers used for blood products.
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Arginina/farmacologia , Citratos/farmacologia , Excipientes/farmacologia , Filtração/instrumentação , Vírus da Hepatite E/isolamento & purificação , Filtros Microporos , Nanotecnologia/instrumentação , Plasma/virologia , Soluções , Inativação de Vírus , Animais , Fezes/virologia , Fibrinogênio , Genótipo , Vírus da Hepatite E/efeitos dos fármacos , Vírus da Hepatite E/genética , Vírus da Hepatite E/fisiologia , Temperatura Alta , RNA Viral/análise , Albumina Sérica , Cloreto de Sódio , Suínos/virologia , Fatores de Tempo , Carga Viral , Replicação Viral/efeitos dos fármacosRESUMO
Interleukin (IL)-32 is a recently described proinflammatory cytokine, characterized by induction of nuclear factor (NF)-kappaB activation. We studied IL-32alpha expression in the inflamed mucosa of inflammatory bowel disease (IBD). We also investigated mechanisms regulating IL-32alpha expression. Tissue samples were obtained endoscopically or surgically from patients with ulcerative colitis (UC) (n = 10), Crohn's disease (CD) (n = 10), ischaemic colitis (n = 4) and normal colorectal tissues (n = 10). IL-32alpha expression was evaluated by standard immunohistochemical procedure. IL-32 mRNA expression was analysed by Northern blot. IL-32alpha was expressed weakly by colonic epithelial cells from normal individuals and subjects with ischaemic colitis. In the inflamed mucosa of IBD patients, epithelial IL-32alpha expression was increased markedly. In UC and CD patients, IL-32alpha expression was enhanced in affected mucosa compared to non-affected mucosa. In intestinal epithelial cell lines, expression of IL-32alpha mRNA and protein was enhanced by IL-1beta, interferon (IFN)-gamma and tumour necrosis factor (TNF)-alpha. A combination of TNF-alpha plus IFN-gamma exerted synergistic effects. IL-32alpha induction by IL-1beta and/or TNF-alpha was mediated by NF-kappaB activation. Epithelial IL-32alpha expression was increased in IBD patients, and in CD patients in particular. IL-32alpha might be involved in the pathophysiology of IBD as a proinflammatory cytokine and a mediator of innate immune response.