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1.
Phys Rev Lett ; 131(10): 102502, 2023 Sep 08.
Artigo em Inglês | MEDLINE | ID: mdl-37739382

RESUMO

The absolute scale of the neutrino mass plays a critical role in physics at every scale, from the subatomic to the cosmological. Measurements of the tritium end-point spectrum have provided the most precise direct limit on the neutrino mass scale. In this Letter, we present advances by Project 8 to the cyclotron radiation emission spectroscopy (CRES) technique culminating in the first frequency-based neutrino mass limit. With only a cm^{3}-scale physical detection volume, a limit of m_{ß}<155 eV/c^{2} (152 eV/c^{2}) is extracted from the background-free measurement of the continuous tritium beta spectrum in a Bayesian (frequentist) analysis. Using ^{83m}Kr calibration data, a resolution of 1.66±0.19 eV (FWHM) is measured, the detector response model is validated, and the efficiency is characterized over the multi-keV tritium analysis window. These measurements establish the potential of CRES for a high-sensitivity next-generation direct neutrino mass experiment featuring low background and high resolution.

2.
Vet Dermatol ; 34(3): 175-208, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-37154488

RESUMO

BACKGROUND: Allergic skin diseases are common in horses worldwide. The most common causes are insect bites and environmental allergens. OBJECTIVES: To review the current literature and provide consensus on pathogenesis, diagnosis, treatment and prevention. MATERIALS AND METHODS: The authors reviewed the literature up to November 2022. Results were presented at North America Veterinary Dermatology Forum (2021) and European Veterinary Dermatology Congress (2021). The report was available to member organisations of the World Association for Veterinary Dermatology for feedback. CONCLUSIONS AND CLINICAL RELEVANCE: Insect bite hypersensitivity (IBH) is the best characterised allergic skin disease. An immunoglobulin (Ig)E response against Culicoides salivary antigens is widely documented. Genetics and environmental factors play important roles. Tests with high sensitivity and specificity are lacking, and diagnosis of IBH is based on clinical signs, seasonality and response to insect control. Eosinophils, interleukin (IL)-5 and IL-31 are explored as therapeutic targets. Presently, the most effective treatment is insect avoidance. Existing evidence does not support allergen-specific immunotherapy (ASIT) using commercially available extracts of Culicoides. Hypersensitivity to environmental allergens (atopic dermatitis) is the next most common allergy. A role for IgE is supported by serological investigation, skin test studies and positive response to ASIT. Prospective, controlled, randomised studies are limited, and treatment relies largely on glucocorticoids, antihistamines and ASIT based on retrospective studies. Foods are known triggers for urticaria, yet their role in pruritic dermatitis is unknown. Recurrent urticaria is common in horses, yet our understanding is limited and focussed on IgE and T-helper 2 cell response. Prospective, controlled studies on treatments for urticaria are lacking. Glucocorticoids and antihistamines are primary reported treatments.


Assuntos
Ceratopogonidae , Dermatite Atópica , Dermatologia , Doenças dos Cavalos , Hipersensibilidade , Mordeduras e Picadas de Insetos , Urticária , Animais , Cavalos , Dermatite Atópica/diagnóstico , Dermatite Atópica/terapia , Dermatite Atópica/veterinária , Estudos Retrospectivos , Estudos Prospectivos , Imunoglobulina E , Hipersensibilidade/veterinária , Alérgenos , Urticária/veterinária , Doenças dos Cavalos/diagnóstico , Doenças dos Cavalos/terapia , Mordeduras e Picadas de Insetos/complicações , Mordeduras e Picadas de Insetos/veterinária
3.
Unfallchirurg ; 124(9): 738-746, 2021 Sep.
Artigo em Alemão | MEDLINE | ID: mdl-34236448

RESUMO

INTRODUCTION: Conventional chondrosarcoma is the second most common primary malignant bone tumor and usually occurs at older adult ages. It is rare in childhood and adolescence. CASE HISTORY: This case report presents the treatment course of a 13-year-old boy with a symptomatic chondrogenic tumor of the right distal femur. Histopathologically, an epiphyseal intermediate-grade chondrosarcoma (G2) was diagnosed. DISCUSSION: Based on the following case, potential radiological and histopathological differential diagnoses, such as chondroblastoma or chondroblastic osteosarcoma, are discussed against the background of current standards in orthopedic oncology.


Assuntos
Neoplasias Ósseas , Condroblastoma , Condrossarcoma , Osteossarcoma , Adolescente , Idoso , Neoplasias Ósseas/diagnóstico por imagem , Neoplasias Ósseas/cirurgia , Condroblastoma/diagnóstico por imagem , Condroblastoma/cirurgia , Condrossarcoma/diagnóstico por imagem , Condrossarcoma/cirurgia , Epífises , Humanos , Masculino , Osteossarcoma/diagnóstico por imagem , Osteossarcoma/cirurgia
4.
Allergy ; 73(10): 1989-1999, 2018 10.
Artigo em Inglês | MEDLINE | ID: mdl-29675865

RESUMO

In human patients with seasonal allergic rhinoconjunctivitis sensitized to grass pollen, the first successful allergen immunotherapy (AIT) was reported in 1911. Today, immunotherapy is an accepted treatment for allergic asthma, allergic rhinitis and hypersensitivities to insect venom. AIT is also used for atopic dermatitis and recently for food allergy. Subcutaneous, epicutaneous, intralymphatic, oral and sublingual protocols of AIT exist. In animals, most data are available in dogs where subcutaneous AIT is an accepted treatment for atopic dermatitis. Initiating a regulatory response and a production of "blocking" IgG antibodies with AIT are similar mechanisms in human beings and dogs with allergic diseases. Although subcutaneous immunotherapy is used for atopic dermatitis in cats, data for its efficacy are sparse. There is some evidence for successful treatment of feline asthma with AIT. In horses, most studies evaluate the effect of AIT on insect hypersensitivity with conflicting results although promising pilot studies have demonstrated the prophylaxis of insect hypersensitivity with recombinant antigens of biting midges (Culicoides spp.). Optimizing AIT using allergoids, peptide immunotherapy, recombinant allergens and new adjuvants with the different administration types of allergen extracts will further improve compliance and efficacy of this proven treatment modality.


Assuntos
Dessensibilização Imunológica/métodos , Adjuvantes Imunológicos , Alérgenos/imunologia , Animais , Venenos de Artrópodes/imunologia , Gatos , Dermatite Atópica/imunologia , Dessensibilização Imunológica/veterinária , Cães , Cavalos , Humanos , Hipersensibilidade/classificação , Modelos Animais
5.
Allergy ; 72(11): 1643-1656, 2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-28394404

RESUMO

Adverse food reactions occur in human as well as veterinary patients. Systematic comparison may lead to improved recommendations for prevention and treatment in both. In this position paper, we summarize the current knowledge on immediate-type food allergy vs other food adverse reactions in companion animals, and compare this to the human situation. While the prevalence of food allergy in humans has been well studied for some allergens, this remains to be investigated for animal patients, where owner-reported as well as veterinarian-diagnosed food adverse reactions are on the increase. The characteristics of the disease in humans vs dogs, cats, and horses are most often caused by similar, but sometimes species-dependent different pathophysiological mechanisms, prompting the specific clinical symptoms, diagnoses, and treatments. Furthermore, little is known about the allergen molecules causative for type I food allergy in animals, which, like in human patients, could represent predictive biomarkers for risk evaluation. The definite diagnosis of food allergy relies-as in humans-on elimination diet and provocation tests. Besides allergen avoidance in daily practice, novel treatment options and tolerization strategies are underway. Taken together, numerous knowledge gaps were identified in veterinary food allergy, which need to be filled by systematic comparative studies.


Assuntos
Hipersensibilidade Alimentar/veterinária , Hipersensibilidade Imediata/veterinária , Animais de Estimação/imunologia , Animais , Gatos , Cães , Hipersensibilidade Alimentar/diagnóstico , Cavalos , Humanos , Hipersensibilidade Imediata/diagnóstico
6.
Allergy ; 71(1): 27-35, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26280544

RESUMO

Allergic diseases in animals are increasingly gaining importance in veterinary practice and as research models. For intradermal testing and allergen immunotherapy, a good knowledge of relevant allergens for the individual species is of great importance. Currently, the knowledge about relevant veterinary allergens is based on sensitization rates identified by intradermal testing or serum testing for allergen-specific IgE; crude extracts are the basis for most evaluations. Only a few studies provide evidence about the molecular structure of (particularly) dust mite, insect and mould allergens in dogs and horses, respectively. In those species, some major allergens differ from those in humans. This position paper summarizes the current knowledge about relevant allergens in dogs, cats and horses.


Assuntos
Alérgenos/imunologia , Doenças dos Animais/imunologia , Hipersensibilidade/veterinária , Medicina Veterinária , Animais , Gatos , Cães , Cavalos , Humanos
7.
Br J Dermatol ; 173(2): 535-9, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-25641516

RESUMO

Cowpox viruses are orthopoxviruses that may survive in the environment for years. Rodents are regarded as the primary hosts, but transmission to other species has been reported. This report describes a cowpox virus infection in a cat with subsequent transmission to its owner leading to protracted, atypical and severe clinical signs. A young cat presented with multiple crusts and plaques on the neck, muzzle and tail base. The owner developed an erythematous lesion with elevated margins, central necrosis and crust formation below the left breast, a neurogenic inflammation, enlarged regional lymph nodes, a colliquative lymphadenitis and concomitant flu-like symptoms. Cultures were taken at the first visit from the cat's lesional skin and the patient's skin, and polymerase chain reaction with sequencing of the haemagglutinin region of both were positive for cowpox virus. The patient was treated with various antibiotics and methylprednisolone and was in clinical remission after 7 months.


Assuntos
Varíola Bovina/transmissão , Linfadenite/virologia , Inflamação Neurogênica/virologia , Adulto , Animais , Animais Domésticos , Axila , Gatos , Vírus da Varíola Bovina/genética , Vírus da Varíola Bovina/isolamento & purificação , DNA Viral/isolamento & purificação , Feminino , Humanos
8.
Phys Chem Chem Phys ; 17(41): 27481-7, 2015 Nov 07.
Artigo em Inglês | MEDLINE | ID: mdl-26426141

RESUMO

Pulsed field gradient (PFG) NMR was applied to measure tortuosity factors for carbon dioxide diffusion in the Knudsen and gas regimes inside monoliths of a samaria-alumina aerogel catalyst, a high porosity material containing micropores in addition to meso- and macropores. The apparent tortuosity factor obtained from PFG NMR measurements for the Knudsen diffusion in the meso- and macropores of the catalyst has an unexpectedly large value of approximately 6 if carbon dioxide adsorption in the micropores and other types of surface adsorption sites of the catalyst is ignored. At the same time, the corresponding apparent tortuosity factor in the gas regime was found to be around 2. Application of a proposed model which describes fast molecular exchange between the surface adsorption sites and the main pore volume of the catalyst yields corrected tortuosity factors which depend only on the pore system geometry. Using this model, the corrected tortuosity factors were found to be around 2 for both diffusion regimes, in agreement with the expectations based on a high porosity of the studied catalyst.

9.
Integr Org Biol ; 6(1): obae021, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39006893

RESUMO

Evolutionary increases in genome size, cell volume, and nuclear volume have been observed across the tree of life, with positive correlations documented between all three traits. Developmental tempo slows as genomes, nuclei, and cells increase in size, yet the driving mechanisms are poorly understood. To bridge this gap, we use a mathematical model of the somitogenesis clock to link slowed developmental tempo with changes in intra-cellular gene expression kinetics induced by increasing genome size and nuclear volume. We adapt a well-known somitogenesis clock model to two model amphibian species that vary 10-fold in genome size: Xenopus laevis (3.1 Gb) and Ambystoma mexicanum (32 Gb). Based on simulations and backed by analytical derivations, we identify parameter changes originating from increased genome and nuclear size that slow gene expression kinetics. We simulate biological scenarios for which these parameter changes mathematically recapitulate slowed gene expression in A. mexicanum relative to X. laevis, and we consider scenarios for which additional alterations in gene product stability and chromatin packing are necessary. Results suggest that slowed degradation rates as well as changes induced by increasing nuclear volume and intron length, which remain relatively unexplored, are significant drivers of slowed developmental tempo.

10.
Strahlenther Onkol ; 189(2): 137-41, 2013 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-23283589

RESUMO

PURPOSE: To find out whether the use of stereotactic techniques for fractionated radiotherapy reduces toxicity to the endocrine and visual system in patients with benign perioptic tumors. PATIENTS AND METHODS: From 1993 to 2009, 29 patients were treated with fractionated stereotactic radiotherapy. The most frequent tumor types were grade I meningioma (n = 11) and pituitary adenoma (n = 10, 7 nonfunctioning, 3 growth hormone-producing). Patients were immobilized with the GTC frame (Radionics, USA) and the planning target volume (PTV; median 24.7, 4.6-58.6 ml) was irradiated with a total dose of 52.2 Gy (range, 45.0-55.8 Gy) in 1.8-Gy fractions using a linear accelerator (6 MeV photons) equipped with a micro-multileaf collimator. Maximum doses to the optic system and pituitary gland were 53.4 Gy (range, 11.5-57.6 Gy) and 53.6 Gy (range, 12.0-57.9 Gy). RESULTS: Median follow-up was 45 months (range, 10-105 months). Local control was achieved in all but 1 patient (actuarial rate 92% at 5 years and 10 years). In 9 of 29 patients (31%), partial remission was observed (actuarial response rate 40% at 5 years and 10 years). In 4 of 26 patients (15%) with at least partial pituitary function, new hormonal deficits developed (actuarial rate 21% at 5 years and 10 years). This rate was significantly higher in patients treated for a larger PTV (< /> 25 ml: 0% vs. 42% at 5 years and 10 years, p = 0.028). Visual function improved in 4 of 15 patients (27%) who had prior impairment. None of the patients developed treatment-related optic neuropathy, but 2 patients experienced new disease-related visual deficits. CONCLUSION: Fractionated stereotactic radiotherapy for benign tumors of the perioptic and sellar region results in satisfactory response and local control rates and does not affect the visual system. The assumption that patients can be spared hypophyseal insufficiency only holds for small tumors.


Assuntos
Doenças do Sistema Endócrino/etiologia , Doenças do Sistema Endócrino/prevenção & controle , Neoplasias Oculares/radioterapia , Lesões por Radiação/etiologia , Radiocirurgia/efeitos adversos , Radiocirurgia/métodos , Transtornos da Visão/etiologia , Adolescente , Adulto , Idoso , Criança , Fracionamento da Dose de Radiação , Neoplasias Oculares/complicações , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Lesões por Radiação/prevenção & controle , Resultado do Tratamento , Transtornos da Visão/prevenção & controle , Adulto Jovem
11.
Mycoses ; 56(2): 168-72, 2013 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-22849870

RESUMO

Systematic studies about pet guinea pigs with dermatophytosis are rare. The aim of this study was to evaluate clinical signs, therapy and zoonotic risk of pet guinea pigs with dermatophytosis. Questionnaires from both owners (n = 74) of pet guinea pigs with dermatophytosis and their veterinarians (n = 101) were analysed regarding clinical signs, therapy and data pertinent to zoonotic potential. Trichophyton (T.) mentagrophytes was found in 97% of cases. In the weeks preceding the onset of the clinical signs, a new guinea pig joined the household in 43% of cases. One third of the affected guinea pigs had lived in the household for less than 3 months. Predominant clinical signs were alopecia (83%), scaling (73%) and crusting (70%). The most commonly affected body site was the head (75%). In approximately one quarter of the cases humans showed clinical signs of dermatophytosis, in half the households, only children were affected. Skin lesions were seen most often on the face, the neck and the arms. Pet guinea pigs carrying dermatophytes must be considered a serious zoonotic risk for their owners, especially for children. A major risk factor for dermatophytosis seems to be a recent acquisition of a new guinea pig.


Assuntos
Arthrodermataceae/fisiologia , Cobaias/microbiologia , Doenças dos Roedores/diagnóstico , Doenças dos Roedores/tratamento farmacológico , Tinha/veterinária , Zoonoses/microbiologia , Animais , Antifúngicos/uso terapêutico , Arthrodermataceae/efeitos dos fármacos , Feminino , Cobaias/fisiologia , Humanos , Masculino , Doenças dos Roedores/microbiologia , Doenças dos Roedores/transmissão , Tinha/diagnóstico , Tinha/tratamento farmacológico , Tinha/microbiologia , Zoonoses/transmissão
12.
Nat Genet ; 29(3): 345-9, 2001 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-11687802

RESUMO

Hearing impairment affects about 1 in 1,000 children at birth. Approximately 70 loci implicated in non-syndromic forms of deafness have been reported in humans and 24 causative genes have been identified (see also http://www.uia.ac.be/dnalab/hhh). We report a mouse transcript, isolated by a candidate deafness gene approach, that is expressed almost exclusively in the inner ear. Genomic analysis shows that the human ortholog STRC (so called owing to the name we have given its protein-stereocilin), which is located on chromosome 15q15, contains 29 exons encompassing approximately 19 kb. STRC is tandemly duplicated, with the coding sequence of the second copy interrupted by a stop codon in exon 20. We have identified two frameshift mutations and a large deletion in the copy containing 29 coding exons in two families affected by autosomal recessive non-syndromal sensorineural deafness linked to the DFNB16 locus. Stereocilin is made up of 1,809 amino acids, and contains a putative signal petide and several hydrophobic segments. Using immunohistolabeling, we demonstrate that, in the mouse inner ear, stereocilin is expressed only in the sensory hair cells and is associated with the stereocilia, the stiff microvilli forming the structure for mechanoreception of sound stimulation.


Assuntos
Cromossomos Humanos Par 15/genética , Células Ciliadas Auditivas/metabolismo , Perda Auditiva Neurossensorial/genética , Mutação/genética , Proteínas/genética , Sequência de Aminoácidos , Animais , Pré-Escolar , Mapeamento Cromossômico , Clonagem Molecular , Consanguinidade , Análise Mutacional de DNA , Éxons/genética , Perfilação da Expressão Gênica , Marcadores Genéticos/genética , Humanos , Peptídeos e Proteínas de Sinalização Intercelular , Masculino , Proteínas de Membrana , Camundongos , Microscopia de Fluorescência , Dados de Sequência Molecular , Proteínas/química , RNA Mensageiro/análise , RNA Mensageiro/genética , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Sequências de Repetição em Tandem/genética
13.
Nat Genet ; 23(4): 413-9, 1999 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-10581026

RESUMO

We report that mutation of COL11A2 causes deafness previously mapped to the DFNA13 locus on chromosome 6p. We found two families (one American and one Dutch) with autosomal dominant, non-syndromic hearing loss to have mutations in COL11A2 that are predicted to affect the triple-helix domain of the collagen protein. In both families, deafness is non-progressive and predominantly affects middle frequencies. Mice with a targeted disruption of Col11a2 also were shown to have hearing loss. Electron microscopy of the tectorial membrane of these mice revealed loss of organization of the collagen fibrils. Our findings revealed a unique ultrastructural malformation of inner-ear architecture associated with non-syndromic hearing loss, and suggest that tectorial membrane abnormalities may be one aetiology of sensorineural hearing loss primarily affecting the mid-frequencies.


Assuntos
Colágeno/genética , Perda Auditiva Neurossensorial/genética , Mutação de Sentido Incorreto , Sequência de Aminoácidos , Animais , Sequência de Bases , Cromossomos Humanos Par 6/genética , DNA/genética , Modelos Animais de Doenças , Feminino , Genes Dominantes , Perda Auditiva Neurossensorial/patologia , Perda Auditiva Neurossensorial/fisiopatologia , Humanos , Hibridização In Situ , Masculino , Camundongos , Camundongos Knockout , Dados de Sequência Molecular , Linhagem , Polimorfismo Conformacional de Fita Simples
14.
Integr Org Biol ; 5(1): obad015, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37143961

RESUMO

Genome size varies ∼100,000-fold across eukaryotes and has long been hypothesized to be influenced by metamorphosis in animals. Transposable element accumulation has been identified as a major driver of increase, but the nature of constraints limiting the size of genomes has remained unclear, even as traits such as cell size and rate of development co-vary strongly with genome size. Salamanders, which possess diverse metamorphic and non-metamorphic life histories, join the lungfish in having the largest vertebrate genomes-3 to 40 times that of humans-as well as the largest range of variation in genome size. We tested 13 biologically-inspired hypotheses exploring how the form of metamorphosis imposes varying constraints on genome expansion in a broadly representative phylogeny containing 118 species of salamanders. We show that metamorphosis during which animals undergo the most extensive and synchronous remodeling imposes the most severe constraint against genome expansion, with the severity of constraint decreasing with reduced extent and synchronicity of remodeling. More generally, our work demonstrates the potential for broader interpretation of phylogenetic comparative analysis in exploring the balance of multiple evolutionary pressures shaping phenotypic evolution.

15.
Strahlenther Onkol ; 188(11): 1020-4, 2012 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-23053141

RESUMO

PURPOSE: The risk factor "large mediastinal tumor mass" is an internationally accepted unfavorable prognostic factor in the staging of Hodgkin's lymphoma (HL). The definition of this risk factor varies considerably between large cooperative study groups. The purpose of the present analysis was to determine to which degree data obtained from chest radiograph (CRX) give the same results as those from CT scans (CT). METHODS: A total of 145 de novo HL patients in early unfavorable and advanced stages were included in this study. A total of 94 patients had a large mediastinal tumor mass according to the guidelines of the German Hodgkin Study Group (GHSG), while 51 had mediastinal lymph node involvement only. The size of mediastinal involvement and the thoracic diameter were measured on CRX and CT. Agreement between CRX and CT was determined by sensitivity and specificity analysis as well as descriptive statistics and correlations. RESULTS: The correlation of the diameters on CRX with those of CT was 0.95 for the tumor size and 0.77 for the thoracic diameter. The diagnostic decision-large mediastinal mass or not-correlated with 0.81 between CRX and CT and was identical in 90.3% of cases. The sensitivity was 0.87 and the specificity 0.96 for CRX, which is considered the current standard. CONCLUSION: The results show that there is a high agreement between the measurements of CRX and CT. Diagnosis of a large mediastinal mass disagreed in 10% of patients. Since the correct diagnosis of this risk factor is decisive for the adequate multimodal treatment choice, CRX should not be omitted.


Assuntos
Doença de Hodgkin/diagnóstico por imagem , Doença de Hodgkin/radioterapia , Neoplasias do Mediastino/diagnóstico por imagem , Neoplasias do Mediastino/radioterapia , Mediastino/diagnóstico por imagem , Tomografia Computadorizada por Raios X , Adolescente , Adulto , Quimioterapia Adjuvante , Terapia Combinada , Feminino , Doença de Hodgkin/tratamento farmacológico , Doença de Hodgkin/patologia , Humanos , Metástase Linfática/diagnóstico por imagem , Metástase Linfática/patologia , Metástase Linfática/radioterapia , Masculino , Neoplasias do Mediastino/tratamento farmacológico , Neoplasias do Mediastino/patologia , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Prognóstico , Sensibilidade e Especificidade , Adulto Jovem
16.
Strahlenther Onkol ; 188(8): 653-9, 2012 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-22740169

RESUMO

BACKGROUND AND PURPOSE: Conventional algorithms show uncertainties in dose calculation already for three-dimensional conformal radiotherapy (3D-CRT). Intensity-modulated radiotherapy (IMRT) might even increase these. We wanted to assess differences in dose distribution for pencil beam (PB), collapsed cone (CC), and Monte Carlo (MC) algorithm for both 3D-CRT and IMRT in patients with mediastinal Hodgkin lymphoma. PATIENTS AND METHODS: Based on 20 computed tomograph (CT) datasets of patients with mediastinal Hodgkin lymphoma, we created treatment plans according to the guidelines of the German Hodgkin Study Group (GHSG) with PB and CC algorithm for 3D-CRT and with PB and MC algorithm for IMRT. Doses were compared for planning target volume (PTV) and organs at risk. RESULTS: For 3D-CRT, PB overestimated PTV(95) and V(20) of the lung by 6.9% and 3.3% and underestimated V(10) of the lung by 5.8%, compared to the CC algorithm. For IMRT, PB overestimated PTV(95), V(20) of the lung, V(25) of the heart and V(10) of the female left/right breast by 8.1%, 25.8%, 14.0% and 43.6%/189.1%, and underestimated V(10) of the lung, V(4) of the heart and V(4) of the female left/right breast by 6.3%, 6.8% and 23.2%/15.6%, compared to MC. CONCLUSION: The PB algorithm underestimates low doses to the organs at risk and overestimates dose to PTV and high doses to the organs at risk. For 3D-CRT, a well-modeled PB algorithm is clinically acceptable; for IMRT planning, however, an advanced algorithm such as CC or MC should be used at least for part of the plan optimization.


Assuntos
Algoritmos , Doença de Hodgkin/radioterapia , Neoplasias do Mediastino/radioterapia , Dosagem Radioterapêutica , Planejamento da Radioterapia Assistida por Computador/métodos , Radioterapia Conformacional/métodos , Radioterapia de Intensidade Modulada/métodos , Mama/efeitos da radiação , Feminino , Fidelidade a Diretrizes , Humanos , Imageamento Tridimensional/métodos , Masculino , Órgãos em Risco , Doses de Radiação , Tomografia Computadorizada por Raios X/métodos
17.
Strahlenther Onkol ; 188(8): 660-5, 2012 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-22692351

RESUMO

PURPOSE: Based on experience in trials HD10 and HD11 (1998-2003), the radiotherapy reference center of the German Hodgkin Study Group (GHSG) continued their central prospective radiation oncological review in trials HD13 and HD14. The purpose of this analysis was to identify the impact of this procedure on radiotherapeutic management and to compare findings with former trials. METHODS: Between 2003 and 2009, 1,710 patients were enrolled in the HD13 trial (early favorable stages) and 2,039 patients in the HD14 trial (early unfavorable stages). All patients received a total of 30 Gy involved-field (IF) radiotherapy within a combined modality approach. RESULTS: For patients in HD13, there was a correction of disease involvement in 847/1,518 patients (56%), and for patients in HD14 in 1,370/1,905 patients (72%). Most discrepancies were observed in the lower mediastinum (19.2%), infraclavicular (31.7%), upper cervical (12.7%), and supraclavicular (10.8%) lymph nodes. This resulted in a change of disease stage in 241 (7%) patients and a shift into another study protocol in 66 (2%) patients. Due to the incorrect lymph node documentation of the participating study centers, the IF radiotherapy volume had to be enlarged in 1,063/3,423 patients (31%) and reduced in 244/3,423 patients (7.1%). These findings are comparable to the results of the quality control in the trials HD10 and HD11 (2,611 patients reviewed). CONCLUSION: Central review of the diagnostic imaging and clinical findings of Hodgkin's lymphoma patients shows a considerable number of discrepancies compared with the local evaluation. Thus, meticulous evaluation of all imaging information in close collaboration between the radiation oncologist and diagnostic radiologist is mandatory.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Doença de Hodgkin/tratamento farmacológico , Doença de Hodgkin/radioterapia , Neoplasias do Mediastino/tratamento farmacológico , Neoplasias do Mediastino/radioterapia , Controle de Qualidade , Dosagem Radioterapêutica/normas , Planejamento da Radioterapia Assistida por Computador/normas , Quimioterapia Adjuvante , Terapia Combinada , Doença de Hodgkin/patologia , Humanos , Irradiação Linfática/métodos , Metástase Linfática/patologia , Neoplasias do Mediastino/patologia , Estudos Multicêntricos como Assunto , Estudos Prospectivos , Ensaios Clínicos Controlados Aleatórios como Assunto , Resultado do Tratamento
18.
Strahlenther Onkol ; 188(4): 319-25, 2012 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-22349709

RESUMO

BACKGROUND AND PURPOSE: Stereotactic linear accelerator-based radiosurgery (LINAC-RS) is increasingly used for microsurgically inaccessible or recurrent pituitary adenomas. This single-center study evaluates the long-term follow-up after LINAC-RS of nonsecreting pituitary adenomas (NSA). PATIENTS AND METHODS: Between 1992 and August 2008, 65 patients with NSA were treated. Patient treatment and follow-up were conducted according to a prospective protocol. Indications for LINAC-RS were (1) tumor recurrence or (2) residual tumor. Three patients were treated primarily. For analysis of prognostic factors, patients were grouped according to epidemiological or treatment-associated characteristics. RESULTS: A total of 61 patients with a follow-up ≥ 12 months (median 83 months, range 15-186 months, longest follow-up of published radiosurgery series) were evaluated with regard to their clinical, radiological, and endocrinological course. The median tumor volume was 3.5 ml (± 4.3 ml, range 0.3-17.3 ml) treated with a median surface and maximum dose of 13.0 Gy and 29.7 Gy, respectively. Local tumor control was achieved in 98%. One patient died of unrelated cause after 36 months and 1 patient developed a radiation-induced seizure disorder. Visual complications did not occur. In 37 of 41 patients (90.2%), pituitary function remained stable. Maximum dose to the pituitary ≤ 16 Gy and female gender were positive prognostic factors for the preservation of pituitary function. CONCLUSION: LINAC-RS is a minimally invasive, safe, and effective treatment for recurrent NSA or microsurgically inaccessible residual tumor. LINAC-RS yielded a high rate of local long-term tumor control with a small number of radiation-induced side effects.


Assuntos
Adenoma/cirurgia , Recidiva Local de Neoplasia/cirurgia , Neoplasia Residual/cirurgia , Neoplasias Hipofisárias/cirurgia , Radiocirurgia/métodos , Adenoma/diagnóstico , Adolescente , Adulto , Idoso , Progressão da Doença , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/diagnóstico , Neoplasia Residual/diagnóstico , Órgãos em Risco , Neoplasias Hipofisárias/diagnóstico , Complicações Pós-Operatórias/etiologia , Prognóstico , Estudos Prospectivos , Reoperação , Adulto Jovem
19.
Lett Appl Microbiol ; 54(1): 26-31, 2012 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-22023239

RESUMO

AIMS: Commercially available selective media for methicillin-resistant Staphylococcus aureus (MRSA) were tested for the detection and isolation of methicillin-resistant Staphylococcus pseudintermedius (MRSP). METHODS AND RESULTS: Five different screening agars [mannitol salt agar with oxacillin and BD BBL™ Chromagar™ MRSA (BD Diagnostics); chromID™ MRSA agar (bioMérieux); Oxacillin resistance screening agar base (ORSAB); and Brilliance MRSA agar (Oxoid)] were analysed for the detection of MRSP. Bacteria that may be isolated together with MRSP and may grow on the screening agars were included in the study to determine possible interference with the growth of MRSP. MRSP grew well on all selective media except on BD BBL™ Chromagar™ MRSA (BD Diagnostics) and chromID™ MRSA agar (bioMérieux), on which a low to moderate growth rate was noted. CONCLUSIONS: ORSAB (Oxoid) and Brilliance MRSA agar (Oxoid) are most suitable for the detection and isolation of MRSP from clinical material. SIGNIFICANCE AND IMPACT OF THE STUDY: The importance of MRSP in veterinary medicine is increasing. Diagnostic systems are needed to detect MRSP carrier as soon as possible. This study provides information about selected MRSA screening agars for the detection of MRSP to the clinical microbiologists.


Assuntos
Meios de Cultura/química , Doenças do Cão/diagnóstico , Resistência a Meticilina , Infecções Estafilocócicas/veterinária , Staphylococcus/isolamento & purificação , Ágar/química , Animais , Portador Sadio , Doenças do Cão/microbiologia , Cães , Staphylococcus aureus Resistente à Meticilina/crescimento & desenvolvimento , Oxacilina/farmacologia , Infecções Estafilocócicas/diagnóstico , Infecções Estafilocócicas/microbiologia , Staphylococcus/efeitos dos fármacos , Staphylococcus/crescimento & desenvolvimento
20.
Int J Sports Med ; 33(9): 740-3, 2012 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-22562734

RESUMO

Whole body vibration (WBV) training is an increasingly popular training method that is strongly promoted for weight loss, but scientific data on its effectiveness, particularly in obese subjects, are sparse. 14 obese women (BMI: 37.4 ± 1.3 kg/m2) randomized to 2 different groups (each n=7) participated in a 6-week endurance training program that was either combined or not combined with additional WBV training. Anthropometric measures, phase angle and body composition (assessed by bioelectrical impedance analysis; BIA), and resting energy expenditure (REE) were obtained before and after the training program. Body weight did not change during the training period (P=0.87), but waist circumference decreased in both groups (P=0.007; WBV: -3.4 ± 1.4 cm; no-WBV: -1.7 ± 0.7 cm) independent of WBV training (P=0.29 for group×time interaction). BIA revealed an enhancing effect of WBV training in comparison to no-WBV training on the phase angle (+0.20 ± 0.12° vs. -0.19 ± 0.12°; P=0.04) and calculated body cell mass (+0.8 ± 0.2 vs. -0.3 ± 0.4 kg; P=0.02), while calculated percentage fat mass decreased in both conditions (P=0.05) to similar extent (P=0.59; WBV: -0.8 ± 0.2%; no-WBV: -0.4 ± 0.5%). REE increased across the training (P=0.01; WBV: +77 ± 33 kcal/24 h; no-WBV: +68 ± 34 kcal/24 h), with this increase again not depending on WBV condition (P=0.85). Results of our pilot study in obese women provide preliminary evidence for a beneficial effect of WBV, when added to endurance training, on the bioelectrical phase angle, an increasingly recognized marker of individual's health status.


Assuntos
Exercício Físico/fisiologia , Obesidade/terapia , Resistência Física/fisiologia , Vibração , Adulto , Antropometria , Composição Corporal/fisiologia , Peso Corporal/fisiologia , Impedância Elétrica , Metabolismo Energético/fisiologia , Feminino , Nível de Saúde , Humanos , Pessoa de Meia-Idade , Projetos Piloto , Circunferência da Cintura/fisiologia
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