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1.
BMJ Mil Health ; 2023 Jun 06.
Artigo em Inglês | MEDLINE | ID: mdl-37280013

RESUMO

INTRODUCTION: On 24 February 2022, the full-scale military invasion of Russia into Ukraine has started, creating one of the largest humanitarian crises in Europe since the World War II. As of 27 July 2022 (by the time when the most of Russian advances have already occurred), more than 900 healthcare facilities in Ukraine were damaged and 127 hospitals were destroyed completely. METHODS: Mobile medical units (MMU) were deployed in the frontline-bordering areas. An MMU included a family doctor, a nurse, a social worker and a driver, and aimed to provide medical help in remote areas. 18 260 patients who received medical help in MMUs in Dnipro (Dnipro city) and Zaporizhia (Zaporizhia city and Shyroke village) oblasts from July until October 2022 were included in the study. The patients were subdivided by month of visit, area of residence and area of MMU operation. Patients' sex, age, date of visit and diagnosis were analysed. Comparison between groups was performed using analysis of variance and Pearson's χ2 tests. RESULTS: Majority of patients were females (57.4%), people aged 60+ years (42.8%) and internally displaced persons (IDPs) (54.8%). The proportion of IDPs increased from 47.4% to 62.8% over the period of study (p<0.01). The most common cause of visit to doctors was cardiovascular diseases (17.9%). The frequency of non-respiratory infections remained stable over the period of study. CONCLUSIONS: In the frontline-bordering areas of Ukraine, females, people older than 60 years and IDPs more frequently sought medical help in MMUs. Causes of morbidity in the studied population were similar to the causes of morbidity before the beginning of full-scale military invasion. Maintaining continuous access to healthcare services may be beneficial for the patient outcomes, especially in terms of cardiovascular disease.

2.
Int J Mol Sci ; 24(7)2023 Mar 29.
Artigo em Inglês | MEDLINE | ID: mdl-37047385

RESUMO

Cannabinoid Receptor 2 (CB2) is a promising target for treating inflammatory diseases. We designed derivatives of 3-carbamoyl-2-pyridone and 1,8-naphthyridin-2(1H)-one-3-carboxamide CB2-selective agonists with reduced lipophilicity. The new compounds were measured for their affinity (radioligand binding) and ability to elicit cyclic adenosine monophosphate (cAMP) signalling and ß-arrestin-2 translocation with temporal resolution (BRET-based biosensors). For the 3-carbamoyl-2-pyridone derivatives, we found that modifying the previously reported compound UOSS77 (also known as S-777469) by appending a PEG2-alcohol via a 3-carbomylcyclohexyl carboxamide (UOSS75) lowered lipophilicity, and preserved binding affinity and signalling profile. The 1,8-naphthyridin-2(1H)-one-3-carboxamide UOMM18, containing a cis configuration at the 3-carboxamide cyclohexyl and with an alcohol on the 4-position of the cyclohexyl, had lower lipophilicity but similar CB2 affinity and biological activity to previously reported compounds of this class. Relative to CP55,940, the new compounds acted as partial agonists and did not exhibit signalling bias. Interestingly, while all compounds shared similar temporal trajectories for maximal efficacy, differing temporal trajectories for potency were observed. Consequently, when applied at sub-maximal concentrations, CP55,940 tended to elicit sustained (cAMP) or increasing (arrestin) responses, whereas responses to the new compounds tended to be transient (cAMP) or sustained (arrestin). In future studies, the compounds characterised here may be useful in elucidating the consequences of differential temporal signalling profiles on CB2-mediated physiological responses.


Assuntos
Arrestina , Cicloexanóis , Arrestina/metabolismo , Transdução de Sinais , AMP Cíclico/metabolismo , Piridonas , Receptores de Canabinoides/metabolismo , Receptor CB2 de Canabinoide/metabolismo , Receptor CB1 de Canabinoide/metabolismo , Agonistas de Receptores de Canabinoides/farmacologia , Agonistas de Receptores de Canabinoides/química
3.
Opt Express ; 30(15): 27004-27014, 2022 Jul 18.
Artigo em Inglês | MEDLINE | ID: mdl-36236881

RESUMO

We report on III-nitride-based micro-light-emitting diodes (µLEDs) operating at 450 nm wavelength with diameters down to 2 µm. Devices with a standard LED structure followed by a tunnel junction were grown by plasma-assisted molecular beam epitaxy. The emission size of µLEDs was defined by shallow He+ implantation of the tunnel junction region. The ion implantation process allows to create flat devices, applicable to further epitaxial regrowth. The shift of current density for the maximum external quantum efficiency as a function of µLEDs diameter was observed. This effect may be a fingerprint of the change in the external efficiency related to the lateral carrier diffusion (limited by holes) in InGaN quantum wells.

4.
Trends Pharmacol Sci ; 43(9): 754-771, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-35906103

RESUMO

Cannabinoid Receptor 2 (CB2) is a G protein-coupled receptor (GPCR) with considerable, though as yet unrealised, therapeutic potential. Promising preclinical data supports the applicability of CB2 activation in autoimmune and inflammatory diseases, pain, neurodegeneration, and osteoporosis. A diverse pharmacopoeia of cannabinoid ligands is available, which has led to considerable advancements in the understanding of CB2 function and extensive preclinical evaluation. However, until recently, most CB2 ligands were highly lipophilic and as such not optimal for clinical application due to unfavourable physicochemical properties. A number of strategies have been applied to develop CB2 ligands to achieve closer to 'drug-like' properties and a few such compounds have now undergone clinical trial. We review the current state of CB2 ligand development and progress in optimising physicochemical properties, understanding advanced molecular pharmacology such as functional selectivity, and clinical evaluation of CB2-targeting compounds.


Assuntos
Canabinoides , Canabinoides/química , Canabinoides/farmacologia , Canabinoides/uso terapêutico , Humanos , Ligantes , Dor , Receptor CB1 de Canabinoide , Receptores de Canabinoides , Receptores Acoplados a Proteínas G
5.
Opt Express ; 28(23): 35321-35329, 2020 Nov 09.
Artigo em Inglês | MEDLINE | ID: mdl-33182980

RESUMO

In this paper, we demonstrate a novel approach utilizing tunnel junction (TJ) to realize GaN-based distributed feedback (DFB) laser diodes (LDs). Thanks to the use of the TJ the top metal contact is moved to the side of the ridge and the DFB grating is placed directly on top of the ridge. The high refractive index contrast between air and GaN, together with the high overlap of optical mode with the grating, provides a high coupling coefficient. The demonstrated DFB LD operates at λ=450.15 nm with a side mode suppression ratio higher than 35dB. The results are compared to a standard Fabry-Perot LD.

6.
Opt Express ; 27(4): 5784-5791, 2019 Feb 18.
Artigo em Inglês | MEDLINE | ID: mdl-30876173

RESUMO

We demonstrate a stack of two III-nitride laser diodes (LDs) interconnected by a tunnel junction grown by plasma-assisted molecular beam epitaxy. Hydrogen-free growth is used to obtain as-grown p-type conductivity essential for buried tunnel junctions (TJ). We show the impact of the design of tunnel junction. In particular, we show that, apart from the beneficial piezoelectric polarization inside the TJ, heavy doping reduces the differential resistivity even further. The device starts to lase at a wavelength of 459 nm with a slope efficiency (SE) of 0.7 W/A followed by lasing at 456 nm from the second active region doubling the total SE to 1.4 W/A. This demonstration opens new possibilities for the fabrication of stacks of ultraviolet and visible high power pulsed III-nitride LD.

7.
Haemophilia ; 23(4): 575-582, 2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-28440004

RESUMO

INTRODUCTION: A room temperature stable formulation of recombinant activated factor VII (NovoSeven® ), allowing convenient storage and therefore improved treatment access, has been developed. Bioequivalence to the previous NovoSeven® was demonstrated in healthy humans, leading to European approval (2008). Although no confirmed cases of neutralising antibodies to rFVIIa in patients with haemophilia A or B have been observed with the original formulation, changes in formulation or storage condition may alter immunogenicity. AIM: SMART-7™ was designed to investigate the safety of NovoSeven® in a real-world setting in patients with haemophilia A or B with inhibitors. METHODS: Study medication was not provided by the sponsor, and treatment was at the discretion of the treating physician, in accordance with the local label. Patient baseline information was collected at enrolment. Information on safety, drug exposure and bleeding episodes was collected and FVII antibody screening was encouraged at baseline and performed at the investigator's discretion. RESULTS: Fifty-one patients were enrolled and 31 completed the study. Forty-one adverse events (AEs) were reported in 23 patients; 25 AEs in 14 patients were serious. No thromboembolic events were observed. Although four cases of reduced therapeutic response were reported, FVII antibody screening was negative. Forty-eight patients experienced 618 bleeding episodes and 93.4% of 609 evaluated bleeds were stopped by treatment. Of the 538 bleeding episodes treated with NovoSeven® monotherapy, 94.2% stopped by end of treatment. CONCLUSION: Data collected during the SMART-7™ study revealed no treatment-related safety issues and no FVII-binding antibodies for patients treated with NovoSeven® under real-world conditions.


Assuntos
Fator VIIa/efeitos adversos , Fator VIIa/uso terapêutico , Hemofilia A/tratamento farmacológico , Hemofilia B/tratamento farmacológico , Segurança , Temperatura , Adolescente , Adulto , Idoso , Criança , Pré-Escolar , Estabilidade de Medicamentos , Fator VIIa/farmacologia , Feminino , Hemofilia A/complicações , Hemofilia B/complicações , Hemorragia/complicações , Humanos , Lactente , Internacionalidade , Masculino , Pessoa de Meia-Idade , Proteínas Recombinantes/efeitos adversos , Proteínas Recombinantes/farmacologia , Proteínas Recombinantes/uso terapêutico , Resultado do Tratamento , Adulto Jovem
8.
Scand J Rheumatol ; 46(5): 369-376, 2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-28145159

RESUMO

OBJECTIVE: To test the hypothesis that non-HLA single-nucleotide polymorphisms (SNPs) associated with the risk of juvenile idiopathic arthritis (JIA) are risk factors for an unfavourable disease outcome at long-term follow-up. METHODS: The Nordic JIA cohort is a prospective multicentre study cohort of patients from the Nordic countries. In all, 193 patients met the inclusion criteria of having an 8 year follow-up assessment and available DNA sample. Seventeen SNPs met the inclusion criteria of having significant associations with JIA in at least two previous independent study cohorts. Clinical endpoints were disease remission, actively inflamed joints and joints with limitation of motion (LOM), articular or extra-articular damage, and history of uveitis. RESULTS: Evidence of associations between genotypes and endpoints were found for STAT4, ADAD1-IL2-IL21, PTPN2, and VTCN1 (p = 0.003-0.05). STAT4_rs7574865 TT was associated with the presence of actively inflamed joints [odds ratio (OR) 20.6, 95% confidence interval (CI) 2.2-> 100, p = 0.003] and extra-articular damage (OR 7.9, 95% CI 1-56.6, p = 0.057). ADAD1_rs17388568 AA was associated with a lower risk of having joints with LOM (OR 0.1, 95% CI 0-0.55, p = 0.016). PTPN2_rs1893217 CC was associated with a lower risk of having joints with LOM (OR 0.2, 95% CI 0-0.99, p = 0.026), while VTCN1_rs2358820 GA was associated with uveitis (OR 3.5, 95% CI 1-12.1, p = 0.029). CONCLUSION: This exploratory study, using a prospectively followed JIA cohort, found significant associations between long-term outcome and SNPs, all previously associated with development of JIA and involved in immune regulation and signal transduction in immune cells.


Assuntos
Artrite Juvenil , Proteína Tirosina Fosfatase não Receptora Tipo 2/genética , Adolescente , Artrite Juvenil/diagnóstico , Artrite Juvenil/epidemiologia , Artrite Juvenil/genética , Artrite Juvenil/imunologia , Criança , Feminino , Predisposição Genética para Doença , Humanos , Imunidade/genética , Masculino , Gravidade do Paciente , Polimorfismo de Nucleotídeo Único , Estudos Prospectivos , Fator de Transcrição STAT4 , Países Escandinavos e Nórdicos/epidemiologia , Inibidor 1 da Ativação de Células T com Domínio V-Set/genética
9.
J Thromb Haemost ; 14(8): 1521-9, 2016 08.
Artigo em Inglês | MEDLINE | ID: mdl-27174727

RESUMO

UNLABELLED: Essentials Nonacog beta pegol is a recombinant glycoPEGylated factor IX with an extended half-life. This phase 3 trial investigated its safety/efficacy in previously treated hemophilia B boys ≤ 12 years. A 40 IU kg(-1) dose provided effective once-weekly prophylaxis and hemostasis when used to treat bleeds. Nonacog beta pegol was well tolerated in previously treated boys ≤ 12 years with hemophilia B. SUMMARY: Background Nonacog beta pegol is a recombinant glycoPEGylated factor IX with an extended half-life, developed to improve care for patients with hemophilia B. Objectives To investigate the safety, efficacy and pharmacokinetics of nonacog beta pegol for the prophylaxis and treatment of bleeds in previously treated children with hemophilia B. Patients/Methods This phase 3 trial, paradigm(™) 5, enrolled and treated 25 children (aged ≤ 12 years) with hemophilia B (FIX ≤ 2%). Patients were stratified by age (0-6 years and 7-12 years), and received once-weekly prophylaxis with 40 IU kg(-1) nonacog beta pegol for 50 exposure days. Results No patient developed inhibitors, and no safety concerns were identified. Forty-two bleeds in 15 patients were reported to have been treated; the overall success rate was 92.9%, and most bleeds (85.7%) resolved after one dose. The median annualized bleeding rates (ABRs; bleeds per patient per year) were 1.0 in the total population, 0.0 in the 0-6-year group, and 2.0 in the 7-12-year group; the estimated mean ABRs were 1.44 in the total population, 0.87 in the 0-6-year group, and 1.88 in the 7-12-year group. For 22 patients who had previously been receiving prophylaxis, the estimated mean ABR was 1.38 versus a historical ABR of 2.51. Estimated mean steady-state FIX trough levels were 0.153 IU mL(-1) (0-6 years) and 0.190 IU mL(-1) (7-12 years). Conclusion Nonacog beta pegol was well tolerated in previously treated children with hemophilia B; a 40 IU kg(-1) dose provided effective once-weekly prophylaxis and hemostasis when bleeds were treated.


Assuntos
Fator IX/farmacocinética , Hemofilia B/tratamento farmacológico , Polietilenoglicóis/farmacocinética , Peso Corporal , Criança , Pré-Escolar , Esquema de Medicação , Fator IX/uso terapêutico , Hemofilia B/sangue , Hemofilia B/metabolismo , Hemorragia , Hemostasia , Humanos , Lactente , Recém-Nascido , Masculino , Polietilenoglicóis/uso terapêutico , Estudos Prospectivos , Proteínas Recombinantes/farmacocinética , Proteínas Recombinantes/uso terapêutico
10.
Lik Sprava ; (11): 93-7, 2014 Nov.
Artigo em Russo | MEDLINE | ID: mdl-25528842

RESUMO

122 patients with osteoarthrosis, who have in the past medical history verified chronic gastritis (50 males and 72 females) at the age from 42 to 64 have been examined. Control group was comprised of 40 patients with osteoarthrosis without gastroduodenal zone pathology in the past medical history. For arthralgia relief patients were prescribed meloxicam (average dose--12.5 - 1.39 mg daily) or nimesulide (average dose--150 ± 14.91 mg daily). As a result of this research it was determined that administration of selective NSAID (meloxicam and nimesulide) in patients with chronic gastritis in the past medical history raised the risk of NSAID gastropathy/dyspepsia 2.9 times (P < 0.03) than in patients without associated gastroduodenal zone pathology. Atrophy of gastric mucosa is associated with higher risks (P > 0.05) of erosive gastropathy. Patients with chronic gastritis in the past medical history when taking NSAID with the purpose of gastropathy prevention are recommended to undergo gastroprotective therapy.


Assuntos
Anti-Inflamatórios não Esteroides/efeitos adversos , Gastrite/patologia , Osteoartrite/patologia , Sulfonamidas/efeitos adversos , Tiazinas/efeitos adversos , Tiazóis/efeitos adversos , Adulto , Doença Crônica , Feminino , Gastrite/induzido quimicamente , Gastrite/prevenção & controle , Humanos , Masculino , Meloxicam , Pessoa de Meia-Idade , Osteoartrite/tratamento farmacológico , Substâncias Protetoras/uso terapêutico
11.
Thromb Res ; 133(5): 868-74, 2014 May.
Artigo em Inglês | MEDLINE | ID: mdl-24560896

RESUMO

INTRODUCTION: Causative mutations leading to congenital quantitative fibrinogen are frequently clustered in FGA encoding the fibrinogen Aα-chain. Mutations of FGB encoding the Bß-chain are less common and of interest since the Bß-chain is considered the rate-limiting factor in the hepatic production of the fibrinogen hexamer. METHOD: Four novel FGB mutations were identified in two afibrinogenemic (one new-born and one 30 years old male) and hypofibrinogenemic (a 49 years old female) patient, with heterogeneous thrombotic and bleeding phenotype. The human fibrinogen beta chain precursor protein sequence (P02675) was obtained from the UniProt database. The resulting models were analysed in SwissPdbViewer 4.1 and POV-Ray 3.7. RESULTS: The FGB c.895T>C p.Y299H (numbering from the initiator Met) and the FGB c.1415G>T p.G472V were predicted to be deleterious by SIFT analysis. The first replaces an uncharged aromatic amino acid side chain by a positively charged side chain modifying the balance in the distribution of hydrophobic and hydrophilic of the 10 Å neighbourhood residues. The second replaces one non-charged aliphatic side chain by another without any changes for the 10 Å surrounding region. The FGB c.352C>T p.Q118X leads to a severe premature termination codon and the FGB intron 4: IVS4-1G>C (c719-1G>C) leads to skipping of exon 5 or usage of a cryptic acceptor site located upstream or downstream of the normal site. CONCLUSIONS: The continuous characterization of novel molecular defects responsible for fibrinogen deficiency combined with modelling of mutant proteins will continue to provide a better comprehension of the complexity of fibrinogen synthesis and physiology.


Assuntos
Afibrinogenemia/congênito , Fibrinogênio/genética , Mutação de Sentido Incorreto , Adulto , Afibrinogenemia/sangue , Afibrinogenemia/genética , Feminino , Fibrinogênio/metabolismo , Humanos , Recém-Nascido , Masculino , Pessoa de Meia-Idade
12.
Ann Rheum Dis ; 71(7): 1122-7, 2012 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-22258487

RESUMO

OBJECTIVE: To compare the juvenile arthritis disease activity score (JADAS) based on C reactive protein (CRP) (JADAS-CRP) with JADAS based on erythrocyte sedimentation rate (ESR) (JADAS-ESR) and to validate JADAS in a population-based setting. METHODS: The CRP and ESR values and the corresponding JADAS scores (JADAS10/27/71) were compared in a longitudinal cohort study of 389 children newly diagnosed with juvenile idiopathic arthritis (JIA) in the Nordic JIA study. The construct validity and the discriminative and predictive ability of JADAS were assessed during a median disease course of 8 years by comparing JADAS with other measures of disease activity and outcome. RESULTS: At the first study visit the correlation between JADAS27-CRP and JADAS27-ESR was r=0.99 whereas the correlation between CRP and ESR was r=0.57. Children with higher JADAS scores had an increased risk of concomitant pain, physical disability and use of disease-modifying antirheumatic drugs (DMARDs). A higher JADAS score at the first study visit also significantly predicted physical disability, damage and no remission off medication at the final study visit, and also use of DMARDs during the disease course. Sensitivity to change, demonstrated as change in JADAS score compared with the American College of Rheumatology paediatric measures of improvement criteria, mostly showed excellent classification ability. CONCLUSION: The JADAS-CRP and JADAS-ESR correlate closely, show similar test characteristics and are feasible and valid tools for assessing disease activity in JIA.


Assuntos
Artrite Juvenil/fisiopatologia , Proteína C-Reativa/análise , Articulações/fisiopatologia , Avaliação de Resultados em Cuidados de Saúde/métodos , Adolescente , Artrite Juvenil/diagnóstico , Sedimentação Sanguínea , Criança , Pré-Escolar , Avaliação da Deficiência , Feminino , Humanos , Articulações/patologia , Masculino , Valor Preditivo dos Testes , Índice de Gravidade de Doença
13.
Scand J Rheumatol ; 41(1): 50-8, 2012 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-22044089

RESUMO

OBJECTIVE: To evaluate a group of 53 patients with juvenile dermatomyositis (JDM), on average 13.9 years after disease onset, in order to describe the long-term disease outcome and to identify disease-related parameters associated with poor disease outcome. METHODS: Baseline information at disease onset was obtained from medical records. Disease status at follow-up was evaluated by physical examination. The Myositis Damage Index (MDI) and the Myositis Disease Damage by Visual Analogue Scale (MYODAM-VAS) were used to describe disease damage. RESULTS: Disease damage was seen in 60.4% of patients. The most common damage was cutaneous scarring (39.6%) and muscle dysfunction (34%). Calcinosis was found in 20%, lipodystrophy in 13%, and severe damage affecting more than two organ systems in 24.5% of patients. A disease duration > 4 years increased the risk of damage based on: MDI score [adjusted odds ratio (AOR) 8.3, 95% confidence interval (CI) 1.7-41.7], MYODAM-VAS score (AOR 26.2, 95% CI 3.1-223.7), and number of affected organs (AOR 16.3, 95% CI 1.1-232.4). Disease onset age ≥ 7.4 years increased the risk of more than two affected organs (AOR 15.8, 95% CI 1.9-129.4). Disease duration ≥ 4 years increased the risk of calcinosis (OR 4.8, 95% CI 1.1-20.9) and continuous muscle dysfunction (OR 4.2, 95% CI 1.1-17.3). CONCLUSION: In a long-term follow-up study, 60% of JDM patients had disease damage at a mean of 14 years after disease onset. Longer disease duration was the most important predictor of damage, calcinosis, and impaired muscle function, and higher age at disease onset predicted more organs involved at follow-up.


Assuntos
Dermatomiosite/diagnóstico , Adolescente , Adulto , Calcinose/diagnóstico , Criança , Pré-Escolar , Estudos Transversais , Dermatomiosite/fisiopatologia , Seguimentos , Humanos , Pessoa de Meia-Idade , Força Muscular , Miosite/diagnóstico , Prognóstico , Estudos Retrospectivos , Perfil de Impacto da Doença , Adulto Jovem
14.
Clin Exp Rheumatol ; 28(5): 782-9, 2010.
Artigo em Inglês | MEDLINE | ID: mdl-21029565

RESUMO

OBJECTIVES: To assess disease characteristics and outcome in Danish juvenile dermatomyositis (JDM) patients (1977-2007). METHODS: Medical record review of hospital records identified from the National Patient Register. RESULTS: Fifty-seven JDM patients were identified. Follow-up time was 7 years (range 0.06-30). Female:male ratio was 2.5:1. Mean age at disease onset was 7 years (SD±3.7), range 1.5-16.0 years. Diagnostic delay was 0.7 years (SD±1.6), range 0.04-9 years. Mean disease duration was 3.7 years (SD±3.5), range 0.7-9 years. Thirty-nine patients (70%) were in full remission. Three patients (5%) were deceased. Disease/treatment-induced damage was present in 35 (61%) patients. Decreased pulmonary function occurred early in the disease course (median 10 months), osteoporosis and calcinosis occurred later (median 18 and 22 months). Four patients developed persistent damage within the first 6 months, four developed calcinosis within the first year. Shorter disease duration was associated with less damage (p=0.004). In a multivariate assessment analysis age >10 years at disease onset was associated with more damage (p<0.01), OR 10.96 (CI 1.6-73.6), and disease duration >4 years was associated with calcinosis (p=0.01) OR 23.2 (CI 2.6-206.2). CONCLUSIONS: We present a nationwide retrospective study of Danish JDM patients from 1977-2007. Although 70% were in remission, 61% of the patients had clinical signs of damage. Only a few patients developed damage within the first year of the disease. Longer disease duration and higher age at disease onset was correlated with more disease damage.


Assuntos
Dermatomiosite/patologia , Dermatomiosite/fisiopatologia , Adolescente , Calcinose/etiologia , Criança , Pré-Escolar , Estudos de Coortes , Dermatomiosite/complicações , Feminino , Seguimentos , Humanos , Lactente , Pneumopatias/etiologia , Pneumopatias/fisiopatologia , Masculino , Prontuários Médicos , Miosite/etiologia , Miosite/patologia , Osteoporose/etiologia , Sistema de Registros , Indução de Remissão , Fatores de Tempo
15.
Micron ; 40(1): 122-5, 2009 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-18395456

RESUMO

Transmission electron microscopy (TEM), atomic force microscopy (AFM), and EDX methods were used to study morphology and chemical composition of SiGe/Si(001) islands grown at 700 degrees C and covered at 550 degrees C and 700 degrees C by Si layers of different thickness. The samples were grown in ultra high vacuum chemical vapor deposition process (UHVCVD) controlled with in situ reflection of high-energy electron diffraction (RHEED). The islands transformed from initial pyramid and dome shapes to lens shape for 1.4 nm and 3.7 nm cap layer thickness at 550 degrees C and 700 degrees C, respectively. An increase of lateral to vertical ratio was observed during the transformation. For the higher depositing temperature the ratio was bigger and was increasing continuously with cap layer thickness. Also, with increasing Si cap layer thickness, the Ge concentration was decreasing, which was more observable for higher capping temperature.

16.
Nanotechnology ; 18(46): 465707, 2007 Nov 21.
Artigo em Inglês | MEDLINE | ID: mdl-21730494

RESUMO

We present transmission electron microscopy (TEM) and x-ray quantitative studies of the indium distribution in In(x)Ga(1-x)N/GaN multiple quantum wells (MQWs) with x = 0.1 and 0.18. The quantum wells were grown by low-pressure metalorganic chemical vapour deposition (LP-MOCVD) on a bulk, dislocation-free, mono-crystalline GaN substrate. By using the quantitative TEM methodology the absolute indium concentration was determined from the 0002 lattice fringe images by the strain measurement coupled with finite element (FE) simulations of surface relaxation of the TEM sample. In the x-ray diffraction (XRD) investigation, a new simulation program was applied to monitor the indium content and lateral composition gradients. We found a very high quality of the multiple quantum wells with lateral indium fluctuations no higher than Δx(L) = 0.025. The individual wells have very similar indium concentration and widths over the whole multiple quantum well (MQW) stack. We also show that the formation of 'false clusters' is not a limiting factor in indium distribution measurements. We interpreted the 'false clusters' as small In-rich islands formed on a sample surface during electron-beam exposure.

17.
Bull Exp Biol Med ; 135 Suppl 7: 96-8, 2003 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-12949665

RESUMO

Affinity-purified antibodies to morphine (mixture of homeopathic dilutions C30+C200) produced an antitussive effect on male and female guinea pigs with cough induced by citric acid and capsaicin.


Assuntos
Anticorpos/farmacologia , Antitussígenos/farmacologia , Pulmão/efeitos dos fármacos , Morfina/imunologia , Animais , Antitussígenos/imunologia , Capsaicina/farmacologia , Ácido Cítrico/farmacologia , Tosse/induzido quimicamente , Tosse/tratamento farmacológico , Feminino , Cobaias , Masculino
18.
Bull Exp Biol Med ; 135 Suppl 7: 146-9, 2003 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-12949683

RESUMO

We studied antitussive activity of antibodies to inflammatory mediators (bradykinin, histamine, and serotonin) in ultralow doses. Experiments were performed on guinea pigs with cough induced by citric acid and capsaicin. Test preparations suppressed cough produced by citric acid. Antibodies to bradykinin in ultralow doses were most potent in relieving capsaicin-induced cough (up to 85%); antibodies to serotonin and, particularly, to histamine produced a smaller effect. Potentiated histamine and serotonin possessed polymodal properties.


Assuntos
Anticorpos/farmacologia , Antitussígenos/farmacologia , Bradicinina/imunologia , Histamina/imunologia , Serotonina/imunologia , Animais , Capsaicina/efeitos adversos , Ácido Cítrico/efeitos adversos , Tosse/induzido quimicamente , Tosse/tratamento farmacológico , Relação Dose-Resposta a Droga , Cobaias , Humanos , Masculino
19.
Artigo em Inglês | MEDLINE | ID: mdl-11598575

RESUMO

OBJECTIVES: We sought to study the long-term outcome of juvenile chronic arthritis (JCA) in the temporomandibular joint (TMJ). STUDY DESIGN: Temporomandibular disorders, including TMJ involvement, were assessed in 42 women with pauciarticular or polyarticular JCA--on average 25.8 years from disease onset--and compared with those found in matched control subjects. Disease-related parameters associated with temporomandibular disorders were identified. RESULTS: The TMJ was involved in 66.7% of the patients, most severely in extended pauciarticular JCA. Temporomandibular disorders were more frequent in the patients than in the control subjects, especially in those with persistent disease. The TMJ involvement was positively correlated with disease duration and negatively correlated with jaw opening and occlusal support. Duration of active JCA and history of functional pain were identified as predictors of present TMJ involvement. CONCLUSION: In a long-term follow-up, TMJ involvement proved frequent in the studied patients and was associated with long disease duration and previous pain on jaw opening. The findings suggest that patients with JCA should undergo orofacial evaluation on a regular basis.


Assuntos
Artrite Juvenil/fisiopatologia , Dor Facial/etiologia , Transtornos da Articulação Temporomandibular/fisiopatologia , Adulto , Análise de Variância , Artrite Juvenil/complicações , Artrite Juvenil/diagnóstico por imagem , Artrite Juvenil/patologia , Força de Mordida , Estudos de Casos e Controles , Doença Crônica , Feminino , Cefaleia/etiologia , Humanos , Modelos Logísticos , Côndilo Mandibular/diagnóstico por imagem , Côndilo Mandibular/patologia , Côndilo Mandibular/fisiopatologia , Medição da Dor , Radiografia , Amplitude de Movimento Articular , Fatores de Risco , Estatísticas não Paramétricas , Inquéritos e Questionários , Transtornos da Articulação Temporomandibular/complicações , Transtornos da Articulação Temporomandibular/diagnóstico por imagem , Transtornos da Articulação Temporomandibular/patologia , Fatores de Tempo
20.
Ann Surg ; 234(3): 404-16; discussion 416-7, 2001 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-11524593

RESUMO

OBJECTIVE: To assess the long-term efficacy of intestinal transplantation under tacrolimus-based immunosuppression and the therapeutic benefit of newly developed adjunct immunosuppressants and management strategies. SUMMARY BACKGROUND DATA: With the advent of tacrolimus in 1990, transplantation of the intestine began to emerge as therapy for intestinal failure. However, a high risk of rejection, with the consequent need for acute and chronic high-dose immunosuppression, has inhibited its widespread application. METHODS: During an 11-year period, divided into two segments by a 1-year moratorium in 1994, 155 patients received 165 intestinal allografts under immunosuppression based on tacrolimus and prednisone: 65 intestine alone, 75 liver and intestine, and 25 multivisceral. For the transplantations since the moratorium (n = 99), an adjunct immunosuppressant (cyclophosphamide or daclizumab) was used for 74 transplantations, adjunct donor bone marrow was given in 39, and the intestine of 11 allografts was irradiated with a single dose of 750 cGy. RESULTS: The actuarial survival rate for the total population was 75% at 1 year, 54% at 5 years, and 42% at 10 years. Recipients of liver plus intestine had the best long-term prognosis and the lowest risk of graft loss from rejection (P =.001). Since 1994, survival rates have improved. Techniques for early detection of Epstein-Barr and cytomegaloviral infections, bone marrow augmentation, the adjunct use of the interleukin-2 antagonist daclizumab, and most recently allograft irradiation may have contributed to the better results. CONCLUSION: The survival rates after intestinal transplantation have cumulatively improved during the past decade. With the management strategies currently under evaluation, intestinal transplant procedures have the potential to become the standard of care for patients with end-stage intestinal failure.


Assuntos
Terapia de Imunossupressão/métodos , Intestinos/transplante , Adulto , Anticorpos Monoclonais/uso terapêutico , Anticorpos Monoclonais Humanizados , Criança , Pré-Escolar , Ciclofosfamida/uso terapêutico , Daclizumabe , Sobrevivência de Enxerto , Doença Enxerto-Hospedeiro/etiologia , Humanos , Imunoglobulina G/uso terapêutico , Transplante de Fígado , Monitorização Imunológica , Prednisona/uso terapêutico , Prognóstico , Tacrolimo/uso terapêutico , Doadores de Tecidos , Condicionamento Pré-Transplante/métodos , Transplante Homólogo , Viroses/etiologia
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