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1.
Stem Cell Res Ther ; 14(1): 283, 2023 10 04.
Artigo em Inglês | MEDLINE | ID: mdl-37794417

RESUMO

BACKGROUNDS: Rheumatoid arthritis (RA) is a chronic and systemic autoimmune disease characterized by synovial inflammation-mediated progressive destruction of the cartilage and bone, resulting in reduced quality of life. We primed human telomerase reverse transcriptase-overexpressing immortalized human adipose tissue-derived mesenchymal stem cells (iMSCs) with serum derived from a non-human primate RA model and studied the immunomodulatory ability of exosomes obtained from primed iMSCs. METHODS: After immunophenotyping, nanoparticle tracking analysis, and in vitro functional tests, Dulbecco's phosphate-buffered saline (dPBS, Group C), exosomes derived from the supernatant of iMSCs (Exo-FBS, Group E), exosomes derived from the supernatant of iMSCs primed with RA serum (Exo-RA, Group F), and methotrexate (Group M) were administered in collagen-induced arthritis (CIA) model mice. dPBS was administered to the normal (N) group for comparison (n = 10/group). RESULTS: Exo-RA had a significantly higher number of exosomes compared to Exo-FBS when measured with nanoparticle tracking analysis or exosome marker CD81, and Transforming growth factor-ß1 amounts were significantly higher in Exo-RA than in Exo-FBS. When Exo-FBS or Exo-RA was administered to the collagen-induced arthritis model, serum interleukin (IL)-4 and the proportion of Th2 (CD4+CD25+GATA3+) and M2 (CD11c - CD206+ of CD45+CD64+) cells were significantly increased compared to the control group. Furthermore, Exo-RA could alleviate cartilage damage by significantly lowering the concentrations of proinflammatory cytokines such as tumor necrosis factor-α, keratinocyte chemoattractant, and IL-12p70. CONCLUSION: Exosomes derived from disease-condition-serum-primed iMSCs ameliorated cartilage damage in a RA model by enhancing TGF-ß1 production, inducing Th2 and M2 polarization and lowering proinflammatory cytokines, TNF-α, KC, and IL-12p70 in the host. Patient-derived serum can be used as an iMSC priming strategy in iMSC-derived exosome treatment of RA.


Assuntos
Artrite Experimental , Artrite Reumatoide , Exossomos , Células-Tronco Mesenquimais , Humanos , Animais , Camundongos , Artrite Experimental/terapia , Fator de Crescimento Transformador beta1/genética , Exossomos/patologia , Qualidade de Vida , Modelos Animais de Doenças , Artrite Reumatoide/terapia , Citocinas , Fator de Necrose Tumoral alfa , Células-Tronco Mesenquimais/patologia
2.
Clin Case Rep ; 11(8): e7741, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-37575459

RESUMO

At 22 weeks post-transplantation for HBV-related cirrhosis, an adult woman developed neutropenia which was aggravated by COVID-19 (ANC 0.4 × 109/L). Covid resolution and all "conventional" modifications were ineffective. Success within 2 weeks was achieved by switching entecavir to tenofovir alafenamide. A step-by-step judicious approach to post-transplant neutropenia is vital.

3.
Phys Rev Lett ; 125(19): 191801, 2020 Nov 06.
Artigo em Inglês | MEDLINE | ID: mdl-33216576

RESUMO

We report a search result for a light sterile neutrino oscillation with roughly 2200 live days of data in the RENO experiment. The search is performed by electron antineutrino (ν[over ¯]_{e}) disappearance taking place between six 2.8 GW_{th} reactors and two identical detectors located at 294 m (near) and 1383 m (far) from the center of the reactor array. A spectral comparison between near and far detectors can explore reactor ν[over ¯]_{e} oscillations to a light sterile neutrino. An observed spectral difference is found to be consistent with that of the three-flavor oscillation model. This yields limits on sin^{2}2θ_{14} in the 10^{-4}≲|Δm_{41}^{2}|≲0.5 eV^{2} region, free from reactor ν[over ¯]_{e} flux and spectrum uncertainties. The RENO result provides the most stringent limits on sterile neutrino mixing at |Δm_{41}^{2}|≲0.002 eV^{2} using the ν[over ¯]_{e} disappearance channel.

4.
J Am Soc Echocardiogr ; 33(10): 1253-1263, 2020 10.
Artigo em Inglês | MEDLINE | ID: mdl-32778498

RESUMO

BACKGROUND: Chemotherapy has led to improved survival in patients with breast cancer; however, it is associated with an increased risk of cardiac dysfunction and heart failure. We investigated the protective effects of rosuvastatin and candesartan, alone and in combination, in a doxorubicin- and trastuzumab-induced rat model of cardiomyopathy. METHODS: Forty-two rats were allocated into six groups (G1-G6): G1, control; G2, doxorubicin only; G3, doxorubicin + trastuzumab; G4, doxorubicin + trastuzumab + rosuvastatin; G5, doxorubicin + trastuzumab + candesartan; and G6, doxorubicin + trastuzumab + rosuvastatin + candesartan. Doxorubicin and trastuzumab were sequentially administered for 28 days. Left ventricular end-systolic dimension and longitudinal strain (LS) were assessed via echocardiography. Left ventricular (LV) performance was evaluated using a microcatheter in the LV apex on day 28. Blood for biomarker analysis was collected from the inferior vena cava before sacrifice. RESULTS: Doxorubicin in combination with trastuzumab increased the LV end-systolic dimension but worsened LS compared with the control group (all P < .05). The level of C-reactive protein was lower in the rosuvastatin treatment group (P = .007) than in the controls but not in the candesartan treatment group. Both rosuvastatin and candesartan attenuated the increase in glutathione. Candesartan treatment improved +dP/dt (P = .011), whereas rosuvastatin did not. In the combination treatment group, the worsening of LS was significantly attenuated compared with that in either the rosuvastatin or candesartan group (all P < .05). CONCLUSIONS: In a rat model of doxorubicin- and trastuzumab-induced cardiomyopathy, rosuvastatin alleviated systemic inflammation, while candesartan improved LV performance. Combination therapy with rosuvastatin and candesartan demonstrated additional preventive effects on myocardial strain. The protective mechanisms of rosuvastatin and candesartan appear to be different but complementary in chemotherapy-induced cardiomyopathy.


Assuntos
Cardiomiopatias , Inibidores de Hidroximetilglutaril-CoA Redutases , Antagonistas de Receptores de Angiotensina/uso terapêutico , Animais , Doxorrubicina , Humanos , Ratos , Trastuzumab
5.
Health Qual Life Outcomes ; 18(1): 173, 2020 Jun 08.
Artigo em Inglês | MEDLINE | ID: mdl-32513190

RESUMO

BACKGROUND: Psoriatic arthritis (PsA) is a chronic immune-mediated inflammatory musculoskeletal disease, manifesting as peripheral arthritis, enthesitis, dactylitis, spondylitis, and skin and nail psoriasis. A core set of domains for measuring the impact of PsA has been developed, including pain, patient global assessment, physical function, health-related quality of life (HRQoL), and fatigue. To understand the impact of PsA on health domains from a patient's perspective, a global survey was developed and results reported in the context of the 12-item Psoriatic Arthritis Impact of Disease (PsAID-12) questionnaire. METHODS: An online patient-based global survey was conducted by The Harris Poll in Australia, Brazil, Canada, France, Spain, Taiwan, the UK, and the US between November 2, 2017 and March 12, 2018. Eligible patients were ≥ 18 years old with a diagnosis of PsA for > 1 year, had visited a rheumatologist/dermatologist in the past 12 months and reported using ≥ 1 synthetic/biologic disease-modifying antirheumatic drug for PsA. Patients reported on PsA severity and symptoms, and the impact of PsA on HRQoL. After survey completion, responses were aligned with PsAID health domains. Descriptive statistics and chi-square tests were conducted. RESULTS: This analysis included 1286 patients from eight countries. Most patients (97%) reported musculoskeletal symptoms relating to PsA in the past year. Common moderate/major impacts of PsA were on physical activity (78%), ability to perform certain activities (76%), work productivity (62%), and career path (57%). Skin/nail symptoms occurred in 80% of patients. Overall, 69% of patients reported that PsA had a moderate/major impact on emotional/mental wellbeing, 56% on romantic relationships/intimacy, and 44% on relationships with family and friends. Social impacts included emotional distress (58%), social shame or disapproval (32%), and ceased participation in social activities (45%). Over half of all patients experienced unusual fatigue over the past 12 months (52%). The health domains that patients reported as being impacted by PsA aligned with life impact domains of the patient-derived PsAID health domains. CONCLUSION: These results highlight the impact of PsA on multiple health domains from a patient perspective that should be considered during shared decision-making processes between healthcare providers and patients.


Assuntos
Artrite Psoriásica/fisiopatologia , Qualidade de Vida , Adulto , Artrite Psoriásica/psicologia , Feminino , Saúde Global , Humanos , Masculino , Pessoa de Meia-Idade , Índice de Gravidade de Doença , Inquéritos e Questionários
6.
Korean Circ J ; 50(7): 613-624, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32588569

RESUMO

BACKGROUND AND OBJECTIVES: Vascular smooth muscle cell (SMC) proliferation and migration play a critical role in neointimal formation. Focal adhesion is involved in cell proliferation and migration, and talin is known to be a key regulator of these processes. We synthesized a new talin modulator that binds to the talin protein, and investigated its effects on SMCs and neointimal formation after vascular injury. METHODS: Human aortic SMCs (HAoSMCs) were treated with a newly synthesized talin modulator. Apolipoprotein E knockout (ApoE KO) mice were subjected to left femoral arterial injury and orally administered with the talin modulator daily. Laser Doppler imager was used to compare the blood flow, and injured femoral arteries and blood serum were analyzed after 28 days. RESULTS: The talin modulator significantly inhibited cell proliferation in a concentration-dependent manner and suppressed the migration of HAoSMCs. Treatment with a talin modulator resulted in a significant reduction in the phosphorylation of focal adhesion molecules and downstream signaling molecules related to cell proliferation and migration. The effects of the talin modulator in HAoSMCs were found to be reversible, as evidenced by the reactivation of signaling pathways upon its removal. After 28 days of administration of the talin modulator, an improvement in the blood flow and reduction in neointimal formation in the injured femoral arteries were observed. CONCLUSIONS: We demonstrated the inhibitory effects of a talin modulator on SMC proliferation and migration, and that were associated with downregulation of signaling pathways, resulting in the attenuation of neointimal formation in ApoE KO mice.

7.
Mater Sci Eng C Mater Biol Appl ; 111: 110781, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32279809

RESUMO

A series of nylon (NY)/linear low-density polyethylene (LLDPE) containing calcined corals (NY/LL-CORALS) composite films were prepared using the cast extrusion method. We investigated the effect of different contents of incorporated calcined corals on the physical properties and antimicrobial activity of the composite films as well as their feasibility for milk storage applications. The results indicated that the main compound in calcined corals was calcium oxide (CaO). As the calcined corals content increased, the crystallinity of the composite films slightly decreased, but no significant changes in their thermal stability and permeability were observed. The NY/LL-CORALS composite films exhibited excellent antimicrobial performance against Escherichia coli and Staphylococcus aureus. Notably, the NY/LL-CORALS packaging significantly extended the lag time of bacteria and delayed the bacterial growth cycle in milk during storage. Thus, the NY/LL-CORALS composite films could be a potential food packaging material that could prolong the shelf life of fresh food.


Assuntos
Antozoários/química , Anti-Infecciosos/química , Embalagem de Alimentos/métodos , Leite/microbiologia , Animais , Anti-Infecciosos/farmacologia , Compostos de Cálcio/química , Escherichia coli/efeitos dos fármacos , Interações Hidrofóbicas e Hidrofílicas , Nylons/química , Óxidos/química , Polietileno/química , Staphylococcus aureus/efeitos dos fármacos , Temperatura
9.
Int J Mol Sci ; 21(6)2020 Mar 21.
Artigo em Inglês | MEDLINE | ID: mdl-32245208

RESUMO

Thymosin ß4 (Tß4) is a G-actin sequestering protein that contributes to diverse cellular activities, such as migration and angiogenesis. In this study, the beneficial effects of combined cell therapy with Tß4 and human adipose-derived stem cells (hASCs) in a mouse ischemic hindlimb model were investigated. We observed that exogenous treatment with Tß4 enhanced endogenous TMSB4X mRNA expression and promoted morphological changes (increased cell length) in hASCs. Interestingly, Tß4 induced the active state of hASCs by up-regulating intracellular signaling pathways including the PI3K/AKT/mTOR and MAPK/ERK pathways. Treatment with Tß4 significantly increased cell migration and sprouting from microbeads. Moreover, additional treatment with Tß4 promoted the endothelial differentiation potential of hASCs by up-regulating various angiogenic genes. To evaluate the in vivo effects of the Tß4-hASCs combination on vessel recruitment, dorsal window chambers were transplanted, and the co-treated mice were found to have a significantly increased number of microvessel branches. Transplantation of hASCs in combination with Tß4 was found to improve blood flow and attenuate limb or foot loss post-ischemia compared to transplantation with hASCs alone. Taken together, the therapeutic application of hASCs combined with Tß4 could be effective in enhancing endothelial differentiation and vascularization for treating hindlimb ischemia.


Assuntos
Membro Posterior/metabolismo , Isquemia/metabolismo , Células-Tronco Mesenquimais/metabolismo , Timosina/metabolismo , Timosina/farmacologia , Animais , Diferenciação Celular/efeitos dos fármacos , Diferenciação Celular/genética , Movimento Celular/efeitos dos fármacos , Movimento Celular/genética , Transplante de Células , Modelos Animais de Doenças , Regulação da Expressão Gênica/efeitos dos fármacos , Regulação da Expressão Gênica/genética , Membro Posterior/irrigação sanguínea , Humanos , Isquemia/genética , Isquemia/terapia , Sistema de Sinalização das MAP Quinases/genética , Masculino , Células-Tronco Mesenquimais/citologia , Camundongos , Camundongos Nus , Neovascularização Fisiológica/genética , Fosfatidilinositol 3-Quinases/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , Serina-Treonina Quinases TOR/metabolismo , Timosina/genética , Timosina/uso terapêutico , Cicatrização/genética
11.
Mol Med ; 26(1): 15, 2020 01 31.
Artigo em Inglês | MEDLINE | ID: mdl-32005100

RESUMO

BACKGROUND: Sca-1+ cardiac stem cells and their limited proliferative potential were major limiting factors for use in various studies. METHODS: Therefore, the effects of sphere genetically engineered cardiac stem cells (S-GECS) inserted with telomerase reverse transcriptase (TERT) were investigated to examine cardiomyocyte survival under hypoxic conditions. GECS was obtained from hTERT-immortalized Sca-1+ cardiac stem cell (CSC) lines, and S-GECS were generated using poly-HEMA. RESULTS: The optimal conditions for S-GECS was determined to be 1052 GECS cells/mm2 and a 48 h culture period to produce spheroids. Compared to adherent-GECS (A-GECS) and S-GECS showed significantly higher mRNA expression of SDF-1α and CXCR4. S-GECS conditioned medium (CM) significantly reduced the proportion of early and late apoptotic cardiomyoblasts during CoCl2-induced hypoxic injury; however, gene silencing via CXCR4 siRNA deteriorated the protective effects of S-GECS against hypoxic injury. As downstream pathways of SDF-1α/CXCR4, the Erk and Akt signaling pathways were stimulated in the presence of S-GECS CM. S-GECS transplantation into a rat acute myocardial infarction model improved cardiac function and reduced the fibrotic area. These cardioprotective effects were confirmed to be related with the SDF-1α/CXCR4 pathway. CONCLUSIONS: Our findings suggest that paracrine factors secreted from transplanted cells may protect host cardiomyoblasts in the infarcted myocardium, contributing to beneficial left ventricle (LV) remodeling after acute myocardial infarction (AMI).


Assuntos
Ataxina-1/metabolismo , Miócitos Cardíacos/citologia , Esferoides Celulares/citologia , Células-Tronco/citologia , Telomerase/genética , Animais , Ataxina-1/genética , Adesão Celular , Técnicas de Cultura de Células , Hipóxia Celular , Linhagem Celular , Proliferação de Células , Sobrevivência Celular , Quimiocina CXCL12/genética , Cobalto/efeitos adversos , Regulação da Expressão Gênica/efeitos dos fármacos , Engenharia Genética , Miócitos Cardíacos/efeitos dos fármacos , Miócitos Cardíacos/metabolismo , Comunicação Parácrina , Regiões Promotoras Genéticas , Ratos , Receptores CXCR4/genética , Esferoides Celulares/metabolismo , Células-Tronco/efeitos dos fármacos , Células-Tronco/metabolismo
12.
Mater Sci Eng C Mater Biol Appl ; 107: 110193, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-31761189

RESUMO

In this study, natural waste of marine corals was calcined to prepare an antimicrobial agent. Energy-dispersive X-ray fluorescence spectroscopy showed that the major element and compound of calcined corals were Ca and CaO, respectively, while X-ray photoelectron spectroscopy revealed the occurrence of more than one oxygen species (O1s) on the surface of calcined corals, which was ascribed to the presence of MgO. Scanning electron microscopy imaging showed that calcined corals had a rough surface and an irregular shape, and the particle size distribution indicated that the average particle size of the calcined corals was 7.3 µm. The calcined corals exhibited large zones of inhibition against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria as well as a fungus (Penicillium sp.), in the antimicrobial tests using well diffusion method. Notably, as a membrane-active and species-specific agent, pronounced antimicrobial activity for calcined corals was observed against S. aureus. Our newly developed bioactive calcined corals could be the potential antimicrobial agents in medical, biological, and food packaging applications.


Assuntos
Antozoários/química , Anti-Infecciosos/química , Compostos de Cálcio/química , Óxidos/química , Animais , Antozoários/metabolismo , Anti-Infecciosos/farmacologia , Cálcio/química , Testes de Sensibilidade a Antimicrobianos por Disco-Difusão , Escherichia coli/efeitos dos fármacos , Tamanho da Partícula , Penicillium/efeitos dos fármacos , Pós/química , Staphylococcus aureus/efeitos dos fármacos
13.
Med J Malaysia ; 74(5): 433-435, 2019 10.
Artigo em Inglês | MEDLINE | ID: mdl-31649222

RESUMO

Ocular chemical injury is a true ophthalmic emergency requiring immediate medical intervention. Damages can be devastating and potentially resulting in blindness, corneal perforation and phthisis bulbi. We describe here a successful treatment outcome in a patient who sustained Roper-Hall Grade 4 injury to both eyes. Patient received medical therapy followed by serial ocular surgeries with eventual visual recovery in one eye from counting finger to 6/15 after a decade. In conclusion, after maximum medical therapy, a carefully planned serial surgeries of cultivated oral mucosal epithelial transplantation (COMET) and PK has proven beneficial for this patient with advanced limbal stem cell deficiency (LSCD).


Assuntos
Queimaduras Químicas/cirurgia , Lesões da Córnea/cirurgia , Células Epiteliais/transplante , Mucosa Bucal/transplante , Queimaduras Químicas/complicações , Queimaduras Químicas/diagnóstico , Células Cultivadas , Lesões da Córnea/diagnóstico , Lesões da Córnea/etiologia , Células Epiteliais/citologia , Seguimentos , Humanos , Ceratoplastia Penetrante , Masculino , Pessoa de Meia-Idade , Mucosa Bucal/citologia
14.
Phys Rev Lett ; 122(23): 232501, 2019 Jun 14.
Artigo em Inglês | MEDLINE | ID: mdl-31298906

RESUMO

We report a fuel-dependent reactor electron antineutrino (ν[over ¯]_{e}) yield using six 2.8 GW_{th} reactors in the Hanbit nuclear power plant complex, Yonggwang, Korea. The analysis uses 850 666 ν[over ¯]_{e} candidate events with a background fraction of 2.0% acquired through inverse beta decay (IBD) interactions in the near detector for 1807.9 live days from August 2011 to February 2018. Based on multiple fuel cycles, we observe a fuel ^{235}U dependent variation of measured IBD yields with a slope of (1.51±0.23)×10^{-43} cm^{2}/fission and measure a total average IBD yield of (5.84±0.13)×10^{-43} cm^{2}/fission. The hypothesis of no fuel-dependent IBD yield is ruled out at 6.6σ. The observed IBD yield variation over ^{235}U isotope fraction does not show significant deviation from the Huber-Mueller (HM) prediction at 1.3 σ. The measured fuel-dependent variation determines IBD yields of (6.15±0.19)×10^{-43} and (4.18±0.26)×10^{-43} cm^{2}/fission for two dominant fuel isotopes ^{235}U and ^{239}Pu, respectively. The measured IBD yield per ^{235}U fission shows the largest deficit relative to the HM prediction. Reevaluation of the ^{235}U IBD yield per fission may mostly solve the reactor antineutrino anomaly (RAA) while ^{239}Pu is not completely ruled out as a possible contributor to the anomaly. We also report a 2.9 σ correlation between the fractional change of the 5 MeV excess and the reactor fuel isotope fraction of ^{235}U.

15.
Mol Med ; 25(1): 33, 2019 07 15.
Artigo em Inglês | MEDLINE | ID: mdl-31307370

RESUMO

BACKGROUND: The beneficial effects of angiotensin II type 1 receptor blockers (ARBs) on atherosclerosis have been demonstrated in numerous studies. We investigated the effects of fimasartan on reducing neointimal formation and systemic inflammation after carotid artery (CA) injury in Apolipoprotein E knockout (ApoE KO) mice. METHODS: ApoE KO mice were randomly allocated to Group I (without CA injury), Group II (without CA injury + Fimasartan), Group III (CA injury), and Group IV (CA injury + Fimasartan). Fimasartan was orally administered everyday starting 3 days before iatrogenic left CA injury. RESULTS: At 28 days, neointimal hyperplasia and the inflammatory cytokines including TNFα, IL-6, ICAM, and MMP-9 in the peripheral blood were significantly reduced in Groups II and IV compared to Groups I and III, respectively. All fimasartan-administered groups revealed significant increases of CD4+CD25+Foxp3+ regulatory T (Treg) cells with increased plasma levels of IL-10 and TGFß. In addition, increased CD8+ T cells by fimasartan were correlated with reduced smooth muscle cell (SMC) proliferation in the neointima in Groups II and IV. Furthermore, the populations of Treg and CD8+ T cells in total splenocytes were increased in Groups II and IV compared to Groups I and III, respectively. The enlargement of spleens due to CA injury in the Group III was attenuated by fimasartan, as shown in the Group IV. These data indicate that fimasartan significantly reduced SMC proliferation in neointima and increased Treg cells in ApoE KO CA injury mice. CONCLUSIONS: This study suggests fimasartan could be an efficient strategy for reduction of atherosclerotic progression, with a decrease in immune response and systemic inflammation.


Assuntos
Compostos de Bifenilo/farmacocinética , Compostos de Bifenilo/uso terapêutico , Lesões das Artérias Carótidas/sangue , Lesões das Artérias Carótidas/tratamento farmacológico , Inflamação/sangue , Inflamação/tratamento farmacológico , Neointima/sangue , Neointima/tratamento farmacológico , Pirimidinas/farmacocinética , Pirimidinas/uso terapêutico , Tetrazóis/farmacocinética , Tetrazóis/uso terapêutico , Antagonistas de Receptores de Angiotensina/uso terapêutico , Animais , Apolipoproteínas E/deficiência , Apolipoproteínas E/genética , Interleucina-6/sangue , Masculino , Metaloproteinase 9 da Matriz/sangue , Camundongos , Camundongos Knockout , Linfócitos T Reguladores/efeitos dos fármacos , Fator de Necrose Tumoral alfa/sangue
16.
Phys Rev Lett ; 121(20): 201801, 2018 Nov 16.
Artigo em Inglês | MEDLINE | ID: mdl-30500262

RESUMO

The RENO experiment reports more precisely measured values of θ_{13} and |Δm_{ee}^{2}| using ∼2200 live days of data. The amplitude and frequency of reactor electron antineutrino (ν[over ¯]_{e}) oscillation are measured by comparing the prompt signal spectra obtained from two identical near and far detectors. In the period between August 2011 and February 2018, the far (near) detector observed 103 212 (850 666) ν[over ¯]_{e} candidate events with a background fraction of 4.8% (2.0%). A clear energy and baseline dependent disappearance of reactor ν[over ¯]_{e} is observed in the deficit of the measured number of ν[over ¯]_{e}. Based on the measured far-to-near ratio of prompt spectra, we obtain sin^{2}2θ_{13}=0.0896±0.0048(stat)±0.0047(syst) and |Δm_{ee}^{2}|=[2.68±0.12(stat)±0.07(syst)]×10^{-3} eV^{2}.

17.
Breast ; 39: 117-122, 2018 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-29660599

RESUMO

It is now increasingly common for breast cancer patients to receive adjuvant tamoxifen therapy for a period of up to 10 years. As survival rate increases, managing tamoxifen ocular toxicities is important for patients' quality of life. Macular pigments in photoreceptor cells protect against free radical damage, which can cause macular degeneration. By reducing macular pigment concentration, tamoxifen may increase the risk of macular degeneration. Here, we compared macular pigment optical density (MPOD) and central macular thickness between breast cancer patients on tamoxifen adjuvant therapy (n = 70), and a control group (n = 72). Multiple regression analysis indicated that MPOD decreases with increasing tamoxifen dosage, up to a threshold of about 20 g, after which MPOD plateaus out. Mean MPOD in the treatment group (mean = 0.40) was significantly lower (p-value = 0.02) compared to the control group (mean = 0.47) for the left eye, and for the right eye (treatment mean = 0.39; control mean = 0.48; p-value = 0.009). No significant difference in mean central macular thickness was found between the treatment and the control group (p-values > 0.4). In the control group, MPOD and central macular thickness showed significant correlation (r∼0.30; p-values < 0.01) for both eyes. However, in the treatment group, loss of significant correlation was observed in the left eye (r = 0.21; p-value = 0.08). The present results show that MPOD decreases non-linearly as a function of tamoxifen dosage, and highlight the potential of tamoxifen to reduce macular pigment concentration through an unknown mechanism that does not depend on macular thinning solely.


Assuntos
Antineoplásicos Hormonais/efeitos adversos , Neoplasias da Mama/tratamento farmacológico , Macula Lutea/efeitos dos fármacos , Pigmento Macular/metabolismo , Tamoxifeno/efeitos adversos , Antineoplásicos Hormonais/administração & dosagem , Quimioterapia Adjuvante/efeitos adversos , Estudos Transversais , Relação Dose-Resposta a Droga , Feminino , Humanos , Macula Lutea/patologia , Degeneração Macular/induzido quimicamente , Pessoa de Meia-Idade , Análise de Regressão , Tamoxifeno/administração & dosagem
18.
Pediatr Allergy Immunol ; 29(3): 290-295, 2018 05.
Artigo em Inglês | MEDLINE | ID: mdl-29350788

RESUMO

BACKGROUND: We have developed the Atopic Dermatitis Symptom Score (ADSS) by which patients or parents can easily assess and record AD symptoms on a daily basis in a smartphone application. The aim of this study was to evaluate the reliability and validity of the ADSS. METHODS: We enrolled 307 children and adolescents with AD. Parents or caregivers were asked to record daily symptoms of the patients (itching, sleep disturbance, erythema, dryness, oozing, and edema) using a scale of 0-4. Statistical analyses consisted of the test-retest reliability, concurrent validity, minimal clinically important difference (MCID), responsiveness, floor or ceiling effects, and screening accuracy. Receiver-operating characteristic analyses were conducted to evaluate the ADSS cutoff point for predicting severe AD (SCORing AD [SCORAD] ≥40). RESULTS: Test-retest reliability between daytime and night-time ADSS was good (intraclass correlation coefficient, 0.82 [95% CI: 0.70-0.90]). An increase in ADSS was significantly associated with an increase in SCORAD (r = 0.64, P < .0001) (concurrent validity). The MCID was 4.1 points for the ADSS. There was a significant association between changes in ADSS and SCORAD (r = 0.56, P < .0001), indicating good responsiveness. At the optimal ADSS cutoff value of 7.0, sensitivity, specificity, and positive and negative predictive values were 88.4%, 78.6%, 21.1%, and 99.1%, respectively (screening accuracy). CONCLUSIONS: The ADSS can be a useful tool for self-assessment of skin symptoms in children with AD.


Assuntos
Dermatite Atópica/diagnóstico , Programas de Rastreamento/métodos , Adolescente , Cuidadores , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Estudos Longitudinais , Masculino , Aplicativos Móveis , Pais , Curva ROC , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Índice de Gravidade de Doença , Smartphone
19.
Acta Biomater ; 65: 272-282, 2018 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-29037896

RESUMO

Nanotopography plays a pivotal role in the regulation of cellular responses. Nonetheless, little is known about how the gradient size of nanostructural stimuli alters the responses of endothelial progenitor cells without chemical factors. Herein, the fabrication of gradient nanopattern plates intended to mimic microenvironment nanotopography is described. The gradient nanopattern plates consist of nanopillars of increasing diameter ranges [120-200 nm (GP 120/200), 200-280 nm (GP 200/280), and 280-360 nm (GP 280/360)] that were used to screen the responses of human endothelial colony-forming cells (hECFCs). Nanopillars with a smaller nanopillar diameter caused the cell area and perimeter of hECFCs to decrease and their filopodial outgrowth to increase. The structure of vinculin (a focal adhesion marker in hECFCs) was also modulated by nanostructural stimuli of the gradient nanopattern plates. Moreover, Rho-associated protein kinase (ROCK) gene expression was significantly higher in hECFCs cultured on GP 120/200 than in those on flat plates (no nanopillars), and ROCK suppression impaired the nanostructural-stimuli-induced vinculin assembly. These results suggest that the gradient nanopattern plates generate size-specific nanostructural stimuli suitable for manipulation of the response of hECFCs, in a process dependent on ROCK signaling. This is the first evidence of size-specific nanostructure-sensing behavior of hECFCs. SIGNIFICANCE: Nano feature surfaces are of growing interest as materials for a controlled response of various cells. In this study, we successfully fabricated gradient nanopattern plates to manipulate the response of blood-derived hECFCs without any chemical stimulation. Interestingly, we find that the sensitive nanopillar size for manipulation of hECFCs is range between 120 nm and 200 nm, which decreased the area and increased the filopodial outgrowth of hECFCs. Furthermore, we only modulate the nanopillar size to increase ROCK expression can be an attractive method for modulating the cytoskeletal integrity and focal adhesion of hECFCs.


Assuntos
Células Endoteliais/citologia , Adesões Focais , Nanoestruturas , Células-Tronco/citologia , Actinas/metabolismo , Adulto , Animais , Western Blotting , Células Cultivadas , Células Endoteliais/metabolismo , Matriz Extracelular/metabolismo , Humanos , Masculino , Microscopia Eletrônica de Transmissão , Pessoa de Meia-Idade , Ratos , Ratos Sprague-Dawley , Reação em Cadeia da Polimerase em Tempo Real , Transdução de Sinais , Células-Tronco/metabolismo , Vinculina/metabolismo , Quinases Associadas a rho/genética , Quinases Associadas a rho/metabolismo
20.
Int J Mol Sci ; 18(1)2017 Jan 22.
Artigo em Inglês | MEDLINE | ID: mdl-28117756

RESUMO

Talin is a focal adhesion protein that activates integrins and recruits other focal adhesion proteins. Talin regulates the interactions between integrins and the extracellular matrix, which are critical for endothelial cells during angiogenesis. In this study, we successfully synthesized a novel talin modulator, N-((2-(1H-indol-3-yl)ethyl)carbamoyl)-2-(benzo[d][1,3]dioxol-5-yloxy)acetamide, referred to as KCH-1521. KCH-1521 was determined to bind talin and modulate downstream signaling molecules of talin. After 24 h of treatment, KCH-1521 changed the cell morphology of human umbilical vein endothelial cells (HUVECs) and reduced focal adhesion protein expression including vinculin and paxillin. Talin downstream signaling is regulated via focal adhesion kinase (FAK), kinase B (AKT), and extracellular signal-regulated kinase (ERK) pathways, however, treatment with KCH-1521 decreased phosphorylation of FAK, AKT, and ERK, leading to reduction of cell proliferation, survival, and angiogenesis. Interestingly, the expression of various angiogenic genes was significantly decreased after treatment with KCH-1521. Also, in vitro tube forming assay revealed that KCH-1521 reduced angiogenic networks in a time-dependent manner. To investigate the reversibility of its effects, KCH-1521 was removed after treatment. HUVECs recovered their morphology through rearrangement of the cytoskeleton and the expression of angiogenic genes was also recovered. By further optimization and in vivo studies of KCH-1521, a novel drug of talin modulation could be used to achieve therapeutic anti-angiogenesis for vascular diseases and cancers.


Assuntos
Células Endoteliais da Veia Umbilical Humana/metabolismo , Neovascularização Fisiológica/efeitos dos fármacos , Talina/metabolismo , Ureia/farmacologia , Forma Celular/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Adesões Focais/efeitos dos fármacos , Adesões Focais/metabolismo , Células Endoteliais da Veia Umbilical Humana/citologia , Células Endoteliais da Veia Umbilical Humana/efeitos dos fármacos , Humanos , Transdução de Sinais/efeitos dos fármacos , Ureia/química
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