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The Sahara Desert episodically became a space available for hominins in the Pleistocene. Mostly, desert conditions prevailed during the interpluvial periods, which were only periodically interrupted by enhanced precipitation during pluvial or interglacial periods. Responding to Quaternary climatic changes, hominin dispersal was channeled through vegetated corridors. This manuscript introduces a recently discovered group of Acheulean and Middle Stone Age sites far from the Nile Valley in the Eastern Desert (Sudan), referred to as Eastern Desert Atbara River (EDAR). The â¼5 m stratigraphy of the area is divided into three units (Units I-III) bounded by erosion surfaces. Each contains archaeological horizons. The EDAR area has rich surface sites with Acheulean horizons under the surface, singular finds of hand-axes within stratigraphic context in exposures, and large Acheulean sites partly exposed and destroyed by the gold mining activity. Optically stimulated luminescence (OSL) dating of Acheulean and MSA horizons from the EDAR 135 site indicates that the sedimentary deposits with stone artifacts were formed during the Middle Pleistocene between Marine Isotope Stages (MIS) 7 (pluvial) and 6 (interpluvial). Based on the OSL dating from the top of Unit IB, Acheulean artifact-bearing sedimentary deposits from overlying Unit IIA are younger than ca. 231 ka. Unit IA is the oldest Acheulean horizon in the EDAR area, not yet dated but definitively older than ca. 231 ka. An MSA horizon found in fluvial sediment was dated to be between 156 and 181 ka by OSL. The EDAR Pleistocene archaeological sites provide evidence for the presence of additional corridor(s) across Nubia, which connects the early hominin dispersals from the Nile and Atbara River systems to the Red Sea coast.
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Evolução Biológica , Meio Ambiente , Hominidae , Migração Humana , Animais , Arqueologia , Humanos , SudãoRESUMO
Anonymized electronic medical records are an increasingly popular source of research data. However, these datasets often lack race and ethnicity information. This creates problems for researchers modeling human disease, as race and ethnicity are powerful confounders for many health exposures and treatment outcomes; race and ethnicity are closely linked to population-specific genetic variation. We showed that deep neural networks generate more accurate estimates for missing racial and ethnic information than competing methods (e.g., logistic regression, random forest, support vector machines, and gradient-boosted decision trees). RIDDLE yielded significantly better classification performance across all metrics that were considered: accuracy, cross-entropy loss (error), precision, recall, and area under the curve for receiver operating characteristic plots (all p < 10-9). We made specific efforts to interpret the trained neural network models to identify, quantify, and visualize medical features which are predictive of race and ethnicity. We used these characterizations of informative features to perform a systematic comparison of differential disease patterns by race and ethnicity. The fact that clinical histories are informative for imputing race and ethnicity could reflect (1) a skewed distribution of blue- and white-collar professions across racial and ethnic groups, (2) uneven accessibility and subjective importance of prophylactic health, (3) possible variation in lifestyle, such as dietary habits, and (4) differences in background genetic variation which predispose to diseases.
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Registros Eletrônicos de Saúde/estatística & dados numéricos , Etnicidade , Grupos Raciais , Biologia Computacional , Fatores Epidemiológicos , Etnicidade/genética , Etnicidade/estatística & dados numéricos , Predisposição Genética para Doença , Variação Genética , Genética Populacional/estatística & dados numéricos , Humanos , Redes Neurais de Computação , Grupos Raciais/genética , Grupos Raciais/estatística & dados numéricos , Aprendizado de Máquina SupervisionadoRESUMO
Cytotoxicity of cytokine-induced killer (CIK) cells depends mainly on their encounters with target cells, but how many CIK cells are required to kill an individual cancer cell is unknown. Here we used time-lapse imaging to quantify the critical effector cell number required to kill an individual target cell. CIK cells killed MHC-I-negative and MHC-I-positive cancer cells, but natural killer (NK) cells destroyed MHC-I-negative cells only. The average threshold number of CIK cells required to kill an individual cancer cell was 6.7 for MHC-I-negative cells and 6.9 for MHC-I-positive cells. That of NK cells was 2.4 for MHC-I-negative cells. Likely due to the higher threshold numbers, killing by CIK cells was delayed in comparison with NK cells: 40% of MHC-negative target cells were killed after 5 h when co-cultured with CIK cells and after 2 h with NK cells. Our data have implications for the rational design of CIK cell-based immunotherapy of cancer patients.
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Células Matadoras Induzidas por Citocinas/imunologia , Imunoterapia Adotiva/métodos , Melanoma Experimental/imunologia , Melanoma Experimental/terapia , Animais , Células Matadoras Induzidas por Citocinas/patologia , Modelos Animais de Doenças , Feminino , Humanos , Melanoma Experimental/patologia , Camundongos , Camundongos Endogâmicos C57BLRESUMO
This paper proposes Fiber-Optic Localized Surface Plasmon Resonance (FO LSPR) sensor combined with a micro fluidic channel, which enables continuous supply of fluid for bio-reaction. The proposed method prevents degradation of the sensing performance due to changes in measurement conditions. The feasibility of the FO LSPR sensor with a micro fluidic channel was demonstrated by computational fluid dynamics (CFD) simulation. Also, the proposed method was assessed by measuring the output intensity of the FO LSPR sensor at various refractive index solutions. Finally, a prostate-specific antigen (PSA) immunoassay was performed to evaluate the possibility of the fabricated sensor system as a biosensor.
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The purpose of this study was to compare the effects of dynamic trunk exercises and isometric trunk exercises on gait in elderly people. [Subjects] This study randomly allocated 20 elderly people to an isometric trunk exercise group (n=10) and a dynamic trunk exercise group (n=10). The exercises were performed for 30 minutes three times a week for 12 weeks. Gait speed, stride length, cadence, and step width were measured at a normal pace using GAITRite. All groups were evaluated before and after 12 weeks. [Results] The isometric exercise group showed a significant change in gait velocity, cadence, and left and right step lengths. The dynamic trunk exercise group showed a significant change in gait velocity, cadence, left and right step lengths, left and right step times, and left and right stride lengths. Moreover, a comparison of the exercise effect between the two groups showed a significant difference in gait velocity. [Conclusion] The results of this study suggest that isometric trunk exercises and dynamic trunk exercises have a positive effect on gait function in elderly people. In particular, isometric trunk exercises are recommended to promote gait velocity.
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Breast cancer is the most common malignancy among females, and cancer invasion and metastasis are the leading causes of cancer death in breast cancer patients. Pterostilbene, a naturally occurring dimethylether analogue of resveratrol, has been demonstrated to possess anti-cancer effects. However, inhibitory effects of pterostilbene on cell migration and invasion and its underlying mechanisms are not fully understood. In this study, we investigated the anti-invasive mechanisms of pterostilbene in human breast cancer cell line MDA-MB-231 cells. Pterostilbene effectively inhibited serum-induced migration and invasion without affecting the viability of breast cancer cells. The mRNA expression and activity of urokinase-type plasminogen activator (uPA) were markedly reduced by pterostilbene treatment. Moreover, pterostilbene attenuated nuclear factor κB (NF-κB) transcriptional activity and DNA binding of NF-κB on uPA promoter. In addition, pterostilbene significantly impaired the activity of Rac1 and the expression of WASP-family verprolin-homologous protein-2 (WAVE-2) and actin-related protein 2/3 (Arp2/3). Overall, these results suggest that pterostilbene caused considerable suppression of cell migration and invasion through blocking NF-κB-mediated uPA expression and Rac1/WAVE/Arp2/3 pathway.
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Complexo 2-3 de Proteínas Relacionadas à Actina/antagonistas & inibidores , Antineoplásicos/farmacologia , Movimento Celular/efeitos dos fármacos , Invasividade Neoplásica/prevenção & controle , Estilbenos/farmacologia , Ativador de Plasminogênio Tipo Uroquinase/antagonistas & inibidores , Família de Proteínas da Síndrome de Wiskott-Aldrich/antagonistas & inibidores , Proteínas rac1 de Ligação ao GTP/antagonistas & inibidores , Complexo 2-3 de Proteínas Relacionadas à Actina/metabolismo , Antineoplásicos/síntese química , Antineoplásicos/química , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Relação Dose-Resposta a Droga , Ensaios de Seleção de Medicamentos Antitumorais , Humanos , Conformação Molecular , Invasividade Neoplásica/patologia , Estilbenos/síntese química , Estilbenos/química , Relação Estrutura-Atividade , Ativador de Plasminogênio Tipo Uroquinase/biossíntese , Ativador de Plasminogênio Tipo Uroquinase/metabolismo , Família de Proteínas da Síndrome de Wiskott-Aldrich/metabolismo , Proteínas rac1 de Ligação ao GTP/metabolismoRESUMO
The invasive behavior of cancer cells resulting in metastasis is the major cause of cancer-related deaths. Rhapontigenin (1) has various biological activities including anticancer activities. However, whether and how 1 affects cancer invasion has never been explored. Here, we examined the anti-invasive effects of 1 and its underlying molecular mechanisms in the highly invasive human breast cancer cell line designated MDA-MB-231. At noncytotoxic concentrations, 1 strongly suppressed serum-induced cell migration and invasion as judged by Boyden chamber analysis and wound-healing assays, respectively. Compound 1 strikingly reduced Rac1 activity as judged by both absorbance-based and pull-down assays. In addition, its downstream effectors such as WASP-family verprolin homologous proteins 2 (WAVE-2) and p21-activated kinase 1 (PAK1) signaling cascades were attenuated after treatment with 1. Immunofluorescence staining showed that 1 diminished lamellipodia formation at the leading edge of cells. Finally, 1 decreased the phosphorylation of phosphoinisitide-3-kinase (PI3K) and AKT. Rac1 activity was inhibited by the PI3K inhibitor wortmannin. Taken together, these results suggest that 1 suppresses breast cancer cell migration and invasion, which is involved in inhibiting the PI3K-dependent Rac1 signaling pathway.
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Inibidores de Fosfoinositídeo-3 Quinase , Estilbenos/farmacologia , Androstadienos/farmacologia , Neoplasias da Mama/metabolismo , Movimento Celular/efeitos dos fármacos , Feminino , Humanos , Estrutura Molecular , Fosforilação , Proteínas Proto-Oncogênicas c-akt/metabolismo , Transdução de Sinais , Estilbenos/química , Via de Sinalização Wnt/efeitos dos fármacos , WortmaninaRESUMO
The underlying antimetastatic mechanism of anethole (1) still remains unclear in association with the molecules of the epithelial to mesenchymal transition (EMT). Herein, the role of the EMT molecules was elucidated in terms of the antimetastatic activity of 1 using DU145 cells. Anethole significantly inhibited the adhesion of DU145 cells to vitronectin-coated plates, as well as migration in a wound-healing assay and invasion using a Boyden chamber. Also, anethole suppressed the expression of MMP-9 in DU145 cells by zymography, ELISA, and RT-PCR. Consistently, the silencing of MMP-9 enhanced the activity of 1 to upregulate the expression of E-cadherin and to attenuate the expression of Vimentin in DU145 cells. Compound 1 enhanced E-cadherin, which is an epithelial marker and attenuated the expression of Vimentin, Twist, and Snail as mesenchymal molecules at the mRNA level. Consistently, anethole upregulated E-cadherin and downregulated the expression of Vimentin, Twist and PI3K, and AKT at the protein level in DU145 cells. Conversely, the antimetastatic effects of 1 to inhibit invasion and the expression of MMP-9 and upregulate E-cadherin were reversed by the EMT inducer TGF-ß in DU145 cells. Overall, the present findings suggest that anethole exerts antimetastatic activity via regulation of crosstalk between EMT molecules and MMP-9 on the basis of the in vitro data obtained.
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Anisóis/farmacologia , Antineoplásicos/farmacologia , Metaloproteinase 9 da Matriz/metabolismo , Derivados de Alilbenzenos , Anisóis/química , Biomarcadores , Caderinas/metabolismo , Transição Epitelial-Mesenquimal , Humanos , Masculino , Metaloproteinase 9 da Matriz/genética , Mesoderma/metabolismo , Estrutura Molecular , Neoplasias da Próstata/tratamento farmacológico , Proteínas Proto-Oncogênicas c-akt/efeitos dos fármacos , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Fator de Crescimento Transformador beta/farmacologia , Proteína 1 Relacionada a Twist/efeitos dos fármacos , Vimentina/efeitos dos fármacosRESUMO
The shape of flexible endoscopic surgical robot should be obtained to increase control accuracy and prevent unwanted tissue damage. To estimate the shape of flexible manipulator, space efficiency, cost-effectiveness, system complexity, and ease of calibration should be considered to integrate sensors into the manipulator. In this article, we propose a real-time method to estimate the shape of a hyper-redundant manipulator having embedded coiled fiber sensors. The main advantage of this method is guaranteeing shape recognition even when the manipulator is subjected to an external load. The fiber sensors are highly flexible, compact, and inexpensive, as well as they can functionally measure both compressive and tensile strain of hyper-redundant manipulator. The sensor design was optimized to achieve durability and sensitivity. The numbers of sensor and the placements were determined by the analysis of the kinematics and moment distribution of the manipulator. The accuracy of shape estimation was validated experimentally under both free-loading and loading conditions. The proposed method achieved real-time estimating capability with a mean maximum error of each joint position smaller than 3.54% in free-loading condition and 5.47% in loading condition.
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Frequencies and phenotypes of immune cells differ between neonates and adults in association with age-specific immune responses. Lymph nodes (LN) are critical tissue sites to quantify and define these differences. Advances in flow cytometry have enabled more multifaceted measurements of complex immune responses. Tissue processing can affect the immune cells under investigation that influence key findings. To understand the impact on immune cells in the LN after processing for single-cell suspension, we compared three dissociation protocols: enzymatic digestion, mechanical dissociation with DNase I treatment, and mechanical dissociation with density gradient separation. We analyzed cell yields, viability, phenotypic and maturation markers of immune cells from the lung-draining LN of neonatal and adult mice two days after intranasal respiratory syncytial virus (RSV) infection. While viability was consistent across age groups, the protocols influenced the yield of subsets defined by important phenotypic and activation markers. Moreover, enzymatic digestion did not show higher overall yields of conventional dendritic cells and macrophages from the LN. Together, our findings show that the three dissociation protocols have similar impacts on the number and viability of cells isolated from the neonatal and adult LN. However, enzymatic digestion impacts the mean fluorescence intensity of key lineage and activation markers that may influence experimental findings.
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Animais Recém-Nascidos , Linfonodos , Linfócitos , Células Mieloides , Fenótipo , Infecções por Vírus Respiratório Sincicial , Animais , Linfonodos/imunologia , Linfonodos/citologia , Camundongos , Infecções por Vírus Respiratório Sincicial/imunologia , Infecções por Vírus Respiratório Sincicial/virologia , Linfócitos/imunologia , Linfócitos/metabolismo , Células Mieloides/imunologia , Separação Celular/métodos , Citometria de Fluxo/métodos , Imunofenotipagem , Feminino , Camundongos Endogâmicos C57BL , Células Dendríticas/imunologia , Células Dendríticas/metabolismoRESUMO
Soybean (SB) leaves (SLs) contain diverse flavonoids with health-promoting properties. To investigate the chemical constituents of SB and their correlations across phenotypes, growing periods, and environmental factors, a validated separation method for mass detection was used with targeted metabolomics. Thirty-six polyphenols (1 coumestrol, 5 flavones, 18 flavonols, and 12 isoflavones) were identified in SLs, 31 of which were quantified. Machine learning (ML) modelling was used to differentiate between the variety, bean color, growing period, and cultivation area and identify the key compounds responsible for these differences. The isoflavone and flavonol profiles were influenced by the growing period and cultivation area based on bootstrap forest modelling. The neural model showed the best predictive capacity for SL differences among the various ML models. Discriminant polyphenols can differ depending on the ML method applied; therefore, a cautious approach should be ensured when using statistical ML outputs, including orthogonal partial least squares discriminant analysis.
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Fabaceae , Isoflavonas , Polifenóis/análise , Glycine max , Metabolômica/métodos , Folhas de Planta/química , Aprendizado de Máquina , Flavonóis , FenótipoRESUMO
BACKGROUND: The selection of appropriate contrast media (CM) remains an important issue in terms of renal preservation in patients with acute myocardial infarction (AMI) and renal impairment scheduled for percutaneous coronary intervention (PCI). We compared the clinical outcomes of patients with AMI and renal impairment, depending on the CM type (iso-osmolar CM [IOCM] vs. low-osmolar CM [LOCM]) that was used during PCI. METHODS: From the Convergent Registry of Catholic and Chonnam University for Acute Myocardial Infarction, 3174 post-PCI patients with AMI and renal impairment were subdivided into two groups (IOCM [n = 2101] and LOCM [n = 1073]). RESULTS: Regarding in-hospital clinical outcomes, the IOCM group had a higher peak creatinine (Cr) level and lower "Cr differential" than the LOCM group. A higher proportion of dialysis was noted in the IOCM group. In 30-day clinical outcomes, the IOCM group showed higher incidence of new-onset heart failure (HF) but lower incidence of revascularization than the LOCM group. The differences in in-hospital and 30-day clinical outcomes were attenuated after inverse probability of treatment weighting, except for new-onset HF. All other variables in 30-day clinical outcomes, including all-cause death, non-fatal myocardial infarction, cerebrovascular accidents, stent thrombosis, and any dialysis events, were similar between the two groups. CONCLUSIONS: IOCM use did not prevent future incidence of dialysis compared to LOCM use in AMI patients with renal impairment.
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Insuficiência Cardíaca , Infarto do Miocárdio , Intervenção Coronária Percutânea , Insuficiência Renal , Humanos , Meios de Contraste/efeitos adversos , RimRESUMO
The research, which was designed as a "pre- and post-single group" study, included patients with lower-limb amputation and aimed to evaluate the effectiveness of self-directed physical-strength training and cardiovascular exercise using a novel digital healthcare management service three times a week for 12 weeks. Muscle strength, thigh circumference, lipid profile and glycated hemoglobin levels, pulmonary function, quality of life, and physical activity level were evaluated before and after the intervention, while satisfaction was measured after the study. Among the 14 included patients, the proportion of adherence to the physical-strength training and physical-strengthening activity were 85.2% and 75.8%, respectively. The level of satisfaction with the digital healthcare management system was high. Significant changes were observed in the muscle-strength tests (dominant grip power and muscle strength of knee flexion and extension of the intact side), thigh circumference, and glycated hemoglobin levels. Further, the quality-of-life score showed improvement, although without significant differences. Individualized exercise management using the novel digital healthcare management system for lower-limb amputees could induce interest in self-care and promote physical activity and healthy behavior. Through this effect, we can expect a reduction in the incidence of cardiovascular diseases, diabetes mellitus, dyslipidemia, and severe injuries from falling.
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Neutrophil trafficking, homeostatic and pathogen elicited, depends upon chemoattractant receptors triggering heterotrimeric G-protein Gαißγ signaling, whose magnitude and kinetics are governed by RGS protein/Gαi interactions. RGS proteins typically limit Gαi signaling by reducing the duration that Gαi subunits remain GTP bound and able to activate downstream effectors. Yet how in totality RGS proteins shape neutrophil chemoattractant receptor activated responses remains unclear. Here, we show that C57Bl/6 mouse neutrophils containing a genomic knock-in of a mutation that disables all RGS protein-Gαi2 interactions (G184S) cannot properly balance chemoattractant receptor signaling, nor appropriately respond to inflammatory insults. Mutant neutrophils accumulate in mouse bone marrow, spleen, lung, and liver; despite neutropenia and an intrinsic inability to properly mobilize from the bone marrow. In vitro they rapidly adhere to ICAM-1 coated plates, but in vivo they poorly adhere to blood vessel endothelium. Those few neutrophils that cross blood vessels and enter tissues migrate haphazardly. Following Concanavalin-A administration fragmented G184S neutrophils accumulate in liver sinusoids leading to thrombo-inflammation and perivasculitis. Thus, neutrophil Gαi2/RGS protein interactions both limit and facilitate Gαi2 signaling thereby promoting normal neutrophil trafficking, aging, and clearance.
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Senescência Celular , Quimiotaxia de Leucócito , Subunidade alfa Gi2 de Proteína de Ligação ao GTP/genética , Subunidade alfa Gi2 de Proteína de Ligação ao GTP/metabolismo , Neutrófilos/imunologia , Neutrófilos/metabolismo , Transdução de Sinais , Animais , Transplante de Medula Óssea , Senescência Celular/genética , Senescência Celular/imunologia , Quimiotaxia de Leucócito/efeitos dos fármacos , Quimiotaxia de Leucócito/genética , Quimiotaxia de Leucócito/imunologia , Humanos , Imunofenotipagem , Masculino , Camundongos , Neutropenia/etiologia , Neutrófilos/efeitos dos fármacos , Receptores CXCR4/antagonistas & inibidores , Receptores CXCR4/metabolismo , Receptores de Interleucina-8B/antagonistas & inibidores , Receptores de Interleucina-8B/metabolismoRESUMO
Although essential for reconstructing hominin behaviour during the Early Palaeolithic, only a handful of Acheulean sites have been dated in the Eastern Sahara region. This is due to the scarcity of sites for this time period and the lack of datable material. However, recent excavations in the Atbara region (Sudan) have provided unique opportunities to analyse and date Acheulean stone tools. We report here on EDAR 7, part of a cluster of Acheulean and Middle Stone Age (MSA) sites that were recently discovered in the Eastern Desert Atbara River (EDAR) region, located in the Eastern Desert (Sudan) far from the Nile valley. At EDAR 7, a 3.5 metre sedimentary sequence was excavated, allowing an Acheulean assemblage to be investigated using a combination of sedimentology, stone tool studies and optically stimulated luminescence dating (OSL). The site has delivered a complete Acheulean knapping chaine opératoire, providing new information about the Saharan Acheulean. The EDAR 7 site is interpreted as a remnant of a campsite based on the co-occurrence of two reduction modes: one geared towards the production of Large Cutting Tools (LCTs), and the other based on the flaking of small debitage and production of flake tools. Particularly notable in the EDAR 7 assemblage is the abundance of cleavers, most of which display evidence of flake production. Implementation of giant Kombewa flakes was also observed. A geometric morphometric analysis of hand-axes was conducted to verify a possible Late Acheulean assemblage standardisation in the Nubian Sahara. In addition, the analysis of micro-traces and wear on the artefacts has provided information on the use history of the Acheulean stone tools. Sediment analyses and OSL dating show that the EDAR 7 sequence contains the oldest Acheulean encampment remains in the Eastern Sahara, dated to the MIS 11 or earlier. This confirms that Homo erectus occupied the EDAR region during Middle Pleistocene humid periods, and demonstrates that habitable corridors existed between the Ethiopian Highlands, the Nile and the Red Sea coast, allowing population dispersals across the continent and out of it.
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Arqueologia/métodos , Hominidae , Animais , SudãoRESUMO
OBJECTIVE: To assess the effects of steroid plus hyaluronate injections for scapulothoracic bursitis in patients with scapular pain. DESIGN: Prospective open-label unicenter trial with a 3-month follow-up. SETTING: University rehabilitation hospital. PARTICIPANTS: Twenty-two cases of suspected scapulothoracic bursitis. INTERVENTION: Injections into scapulothoracic bursa were performed with steroid plus hyaluronate. Injections were administered once a week for 3 weeks. MAIN OUTCOME MEASURES: Visual analog scale (VAS), Rubin scale, adverse events, and injection-associated complications. RESULTS: Mean outcome scores at 3-month follow-up visits showed significant improvements versus baseline (mean VAS increased from 7.8 to 2.2) (P<.05). Furthermore, mean VAS scores at 1, 2, and 3 weeks after treatment commencement showed significant improvements versus baseline (P<.05). No serious complication occurred during the study. CONCLUSIONS: Scapulothoracic bursitis should be considered when treating patients with perimarginal scapular pain or subscapular pain. Our findings show that steroid plus hyaluronate injections into the scapulothoracic bursa provide an effective means of treating patients with scapulothoracic bursitis.
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Bolsa Sinovial , Bursite/tratamento farmacológico , Dor/tratamento farmacológico , Escápula , Adulto , Quimioterapia Combinada , Feminino , Glucocorticoides/uso terapêutico , Hospitais Universitários , Humanos , Ácido Hialurônico/uso terapêutico , Injeções Intra-Articulares , Masculino , Pessoa de Meia-Idade , Medição da Dor , Projetos Piloto , Estudos Prospectivos , Tórax , Triancinolona/uso terapêutico , Viscossuplementos/uso terapêuticoRESUMO
Perfluoroalkoxy alkane (PFA) film-based microelectrode arrays were fabricated in monolithic structure with pretreatment of plasma on the surface followed by patterning gold electrode array without additional adhesion metal layer. The encapsulation of patterned fluoropolymer layer was thermally laminated at the temperature of under its melting point, interleaved between Polytetrafluoroethylene (PTFE) sheets which indicate formation of micro-corrugated pattern. The fabricated device was optically opaque, however, transparent in solution due to the diffraction of light. Packaged substrate was easily processable with focused ion beam laser machine in high resolution. According to excellent reliability, PFA based micro gold electrode can be applied in a variety of biomedical application such as artificial retina, neural sensors with chronic implantation.
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Ouro , Microeletrodos , Retina , Alcanos , Técnicas Biossensoriais , Próteses e Implantes , Reprodutibilidade dos TestesRESUMO
Rivaroxaban has emerged as a potential alternative to warfarin for the prevention of thromboembolism in patients with atrial fibrillation (AF). However, there has been concern for the risk of major bleeding, especially in Asian patients. We investigated the efficacy and safety of rivaroxaban compared to warfarin in Korean real world practice. A total of 2,208 consecutive non-valvular AF patients were divided into the Warfarin group (n=990) and the Rivaroxaban group (n=1218). Propensity matched 1-year clinical outcomes were compared (Warfarin, n=804; Rivaroxaban, n=804). The efficacy outcome was defined as stroke/systemic embolism (SE). The safety outcome was major bleeding. The primary net clinical benefit (NCB) was defined as the composite of stroke/SE, major bleeding, and all-cause mortality. Secondary, NCB was defined as the composite of stroke, SE, and major bleeding. Rivaroxaban had the similar efficacy in terms of thromboembolic event prevention [hazard ratio (HR) 0.69, 95% confidence interval (CI) 0.37-1.32, p=0.266] compared to warfarin. Rivaroxaban significantly lowered the risk of major bleeding [HR 0.41, 95% CI 0.22-0.76, p=0.004]. Primary NCB was significantly low in the rivaroxaban group [HR 0.54, 95% CI 0.36-0.81, p=0.003]. Secondary NCB was also low in the rivaroxaban group [HR 0.62, 95% CI 0.40-0.99, p=0.041]. Both rivaroxaban 15 mg and 20 mg groups had similar efficacy and significantly lower risks of major bleeding as well as primary and secondary NCB compared to the warfarin group. In patients with non-valvular AF, rivaroxaban had a similar efficacy to warfarin in Korean real world practice. However, rivaroxaban had better safety and net clinical outcomes compared to warfarin.
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Natural killer (NK) cell killing of melanoma cells involves perforin-mediated delivery of granzymes from NK cells to cancer cells; however, how melanoma cells die remains poorly characterized. Here, we examined the dying process of melanoma cells by using time-lapse imaging. Upon contact with NK cells, B16-F10 cells rounded and most of them showed membrane rupture (98â¯min); however, B16 parent cells showed writhing and delayed membrane rupture (235â¯min). This morphological difference depended on the expression levels of myosin regulatory light chain 9 (MYL9) but not activating ligands (CD112, CD155, Rae-1, and MULT-1), SPI, FasL, or PD-L1. Taken together, our data show that melanoma cells show two distinct types of morphological changes upon contact with NK cells and suggest that a strategy to decrease MYL9 expression by melanoma cells may improve the efficacy of NK cell-based immunotherapy.
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Células Matadoras Naturais/fisiologia , Melanoma Experimental , Animais , Linhagem Celular Tumoral , Regulação Neoplásica da Expressão Gênica , Humanos , Camundongos , Camundongos Endogâmicos C57BL , Cadeias Leves de Miosina/genética , Cadeias Leves de Miosina/metabolismoRESUMO
Natural killer (NK) cells eliminate cancer cells in a contact-dependent manner. However, how NK cells find cancer cells remain unclear. Here, using time-lapse imaging, we investigated how individual NK cells migrate toward cancer cells. Although naïve B16F10 cancer cells produce low levels of chemokines, IFN-γ-treated B16F10 cells secreted high levels of CXCL10, low levels of CCL5, but did not secrete CCL2, CCL7, or CXCL12. Wild-type NK cells migrated well toward cancer cells and killed them, whereas NK cells deficient in CXCR3 did not. CXCR3-deficient NK cells also showed slower migration speed than did wild-type NK cells. Taken together, our data show that NK cells find cancer cells, at least in part, by sensing CXCL10 produced by cancer cells and suggest that a strategy to increase CXCL10 secretion by cancer cells may improve the efficacy of NK cell-based immunotherapy.