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1.
Indian J Plast Surg ; 57(2): 140-146, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38774732

RESUMO

Background The medial sural artery perforator (MSAP) flap was described by Cavadas et al in 2001. The aim of this study was to analyze the flap characteristics in the regional population and was planned as a cadaveric dissection study. Methods Thirty-three legs of fresh cadavers were studied for perforator characteristics, length, and origin of pedicle and skin paddle thickness. Observations were documented and analyzed. Results Seventeen right legs (51.5%) and sixteen left legs (48.5%) were studied. Twenty-five pedicles originated from popliteal artery (86.2%) and four (13.8%) from the common sural trunk. No perforators were seen in four legs. The mean number of perforators is 2 (0-6). The mean distance of perforator from midpoint of popliteal fossa was 10.7 cm (8-13 cm) and from posterior midline it was 3.2 cm. The mean size of the perforator was 1.1 ± 0.8 mm (0.8-1.5 mm). The mean pedicle length was 9.3 ± 1.3 cm. The mean flap thickness was 4.3 ± 0.7 mm (3.0-5.5 mm). There was no correlation for flap or perforator characteristics with side of leg. Conclusion This study concludes that MSAP is a good flap in terms of perforator characteristics, pedicle length, and flap thickness, when a medium sized thin flap with long pedicle is needed. The location of perforator on calf varies in different population. Being a perforator flap, anatomical variability is common and should be thought of while choosing this flap.

2.
EMBO Rep ; 18(2): 241-263, 2017 02.
Artigo em Inglês | MEDLINE | ID: mdl-28039207

RESUMO

MicroRNA (miRNA)-guided mRNA repression, mediated by the miRNA-induced silencing complex (miRISC), is an important component of post-transcriptional gene silencing. However, how miRISC identifies the target mRNA in vivo is not well understood. Here, we show that the nucleoporin Nup358 plays an important role in this process. Nup358 localizes to the nuclear pore complex and to the cytoplasmic annulate lamellae (AL), and these structures dynamically associate with two mRNP granules: processing bodies (P bodies) and stress granules (SGs). Nup358 depletion disrupts P bodies and concomitantly impairs the miRNA pathway. Furthermore, Nup358 interacts with AGO and GW182 proteins and promotes the association of target mRNA with miRISC A well-characterized SUMO-interacting motif (SIM) in Nup358 is sufficient for Nup358 to directly bind to AGO proteins. Moreover, AGO and PIWI proteins interact with SIMs derived from other SUMO-binding proteins. Our study indicates that Nup358-AGO interaction is important for miRNA-mediated gene silencing and identifies SIM as a new interacting motif for the AGO family of proteins. The findings also support a model wherein the coupling of miRISC with the target mRNA could occur at AL, specialized domains within the ER, and at the nuclear envelope.


Assuntos
Proteínas Argonautas/metabolismo , MicroRNAs/genética , Chaperonas Moleculares/metabolismo , Complexo de Proteínas Formadoras de Poros Nucleares/metabolismo , Domínios e Motivos de Interação entre Proteínas , RNA Mensageiro/genética , Complexo de Inativação Induzido por RNA/metabolismo , Sequência de Aminoácidos , Animais , Proteínas Argonautas/química , Linhagem Celular , Inativação Gênica , Humanos , Corpos de Inclusão Intranuclear/metabolismo , MicroRNAs/metabolismo , Modelos Biológicos , Modelos Moleculares , Chaperonas Moleculares/química , Complexo de Proteínas Formadoras de Poros Nucleares/química , Ligação Proteica , Conformação Proteica , Interferência de RNA , RNA Mensageiro/metabolismo , Transdução de Sinais , Dedos de Zinco
3.
J Synchrotron Radiat ; 24(Pt 6): 1152-1162, 2017 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-29091058

RESUMO

Geometry correction is traditionally plagued by mis-fitting of correlated parameters, leading to local minima which prevent further improvements. Segmented detectors pose an enhanced risk of mis-fitting: even a minor confusion of detector distance and panel separation can prevent improvement in data quality. The slip-and-slide algorithm breaks down effects of the correlated parameters and their associated target functions in a fundamental shift in the approach to the problem. Parameters are never refined against the components of the data to which they are insensitive, providing a dramatic boost in the exploitation of information from a very small number of diffraction patterns. This algorithm can be applied to exploit the adherence of the spot-finding results prior to indexing to a given lattice using unit-cell dimensions as a restraint. Alternatively, it can be applied to the predicted spot locations and the observed reflection positions after indexing from a smaller number of images. Thus, the indexing rate can be boosted by 5.8% using geometry refinement from only 125 indexed patterns or 500 unindexed patterns. In one example of cypovirus type 17 polyhedrin diffraction at the Linac Coherent Light Source, this geometry refinement reveals a detector tilt of 0.3° (resulting in a maximal Z-axis error of ∼0.5 mm from an average detector distance of ∼90 mm) whilst treating all panels independently. Re-indexing and integrating with updated detector geometry reduces systematic errors providing a boost in anomalous signal of sulfur atoms by 20%. Due to the refinement of decoupled parameters, this geometry method also reaches convergence.

4.
J Synchrotron Radiat ; 24(Pt 1): 63-72, 2017 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-28009547

RESUMO

Biological small-angle X-ray scattering (SAXS) is an increasingly popular technique used to obtain nanoscale structural information on macromolecules in solution. However, radiation damage to the samples limits the amount of useful data that can be collected from a single sample. In contrast to the extensive analytical resources available for macromolecular crystallography (MX), there are relatively few tools to quantitate radiation damage for SAXS, some of which require a significant level of manual characterization, with the potential of leading to conflicting results from different studies. Here, computational tools have been developed to automate and standardize radiation damage analysis for SAXS data. RADDOSE-3D, a dose calculation software utility originally written for MX experiments, has been extended to account for the cylindrical geometry of the capillary tube, the liquid composition of the sample and the attenuation of the beam by the capillary material to allow doses to be calculated for many SAXS experiments. Furthermore, a library has been written to visualize and explore the pairwise similarity of frames. The calculated dose for the frame at which three subsequent frames are determined to be dissimilar is defined as the radiation damage onset threshold (RDOT). Analysis of RDOTs has been used to compare the efficacy of radioprotectant compounds to extend the useful lifetime of SAXS samples. Comparison of the RDOTs shows that, for radioprotectant compounds at 5 and 10 mM concentration, glycerol is the most effective compound. However, at 1 and 2 mM concentrations, dithiothreitol (DTT) appears to be most effective. Our newly developed visualization library contains methods that highlight the unusual radiation damage results given by SAXS data collected using higher concentrations of DTT: these observations should pave the way to the development of more sophisticated frame merging strategies.


Assuntos
Substâncias Macromoleculares/química , Espalhamento a Baixo Ângulo , Humanos , Proteínas , Software , Difração de Raios X
5.
Acta Crystallogr D Biol Crystallogr ; 71(Pt 6): 1400-10, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-26057680

RESUMO

Research towards using X-ray free-electron laser (XFEL) data to solve structures using experimental phasing methods such as sulfur single-wavelength anomalous dispersion (SAD) has been hampered by shortcomings in the diffraction models for X-ray diffraction from FELs. Owing to errors in the orientation matrix and overly simple partiality models, researchers have required large numbers of images to converge to reliable estimates for the structure-factor amplitudes, which may not be feasible for all biological systems. Here, data for cytoplasmic polyhedrosis virus type 17 (CPV17) collected at 1.3 Å wavelength at the Linac Coherent Light Source (LCLS) are revisited. A previously published definition of a partiality model for reflections illuminated by self-amplified spontaneous emission (SASE) pulses is built upon, which defines a fraction between 0 and 1 based on the intersection of a reflection with a spread of Ewald spheres modelled by a super-Gaussian wavelength distribution in the X-ray beam. A method of post-refinement to refine the parameters of this model is suggested. This has generated a merged data set with an overall discrepancy (by calculating the R(split) value) of 3.15% to 1.46 Å resolution from a 7225-image data set. The atomic numbers of C, N and O atoms in the structure are distinguishable in the electron-density map. There are 13 S atoms within the 237 residues of CPV17, excluding the initial disordered methionine. These only possess 0.42 anomalous scattering electrons each at 1.3 Å wavelength, but the 12 that have single predominant positions are easily detectable in the anomalous difference Fourier map. It is hoped that these improvements will lead towards XFEL experimental phase determination and structure determination by sulfur SAD and will generally increase the utility of the method for difficult cases.


Assuntos
Algoritmos , Modelos Moleculares , Lasers
6.
J Synchrotron Radiat ; 22(2): 213-24, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25723923

RESUMO

Significant progress has been made in macromolecular crystallography over recent years in both the understanding and mitigation of X-ray induced radiation damage when collecting diffraction data from crystalline proteins. In contrast, despite the large field that is productively engaged in the study of radiation chemistry of nucleic acids, particularly of DNA, there are currently very few X-ray crystallographic studies on radiation damage mechanisms in nucleic acids. Quantitative comparison of damage to protein and DNA crystals separately is challenging, but many of the issues are circumvented by studying pre-formed biological nucleoprotein complexes where direct comparison of each component can be made under the same controlled conditions. Here a model protein-DNA complex C.Esp1396I is employed to investigate specific damage mechanisms for protein and DNA in a biologically relevant complex over a large dose range (2.07-44.63 MGy). In order to allow a quantitative analysis of radiation damage sites from a complex series of macromolecular diffraction data, a computational method has been developed that is generally applicable to the field. Typical specific damage was observed for both the protein on particular amino acids and for the DNA on, for example, the cleavage of base-sugar N1-C and sugar-phosphate C-O bonds. Strikingly the DNA component was determined to be far more resistant to specific damage than the protein for the investigated dose range. At low doses the protein was observed to be susceptible to radiation damage while the DNA was far more resistant, damage only being observed at significantly higher doses.


Assuntos
Dano ao DNA/efeitos da radiação , Nucleoproteínas/efeitos da radiação , Lesões por Radiação , Cristalografia por Raios X/métodos , Relação Dose-Resposta à Radiação , Humanos , Modelos Moleculares , Conformação Proteica/efeitos da radiação
7.
Collegian ; 22(4): 397-403, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26775526

RESUMO

Clinical placement learning experiences are integral to all health and medical curricula as a means of integrating theory into practice and preparing graduates to deliver safe, high-quality care to health consumers. A growing challenge for education providers is to access sufficient clinical placements with experienced supervisors who are skilled at maximising learning opportunities for students. This paper reports on the development and evaluation of an innovative online learning program aimed at enhancing student and clinical supervisors' preparedness for effective workplace-based learning. The evidence-based learning program used 'story-telling' as the learning framework. The stories, which were supported by a range of resources, aimed to engage the learners in understanding student and supervisor responsibilities, as well as the expectations and competencies needed to support effective learning in the clinical environment. Evaluation of this program by the learners and stakeholders clearly indicated that they felt authentically 'connected' with the characters in the stories and developed insights that suggested effective learning had occurred.


Assuntos
Pessoal de Saúde/educação , Aprendizagem , População Rural , Austrália , Humanos
8.
J Long Term Eff Med Implants ; 34(4): 95-101, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38842237

RESUMO

The long-term success of dental implants depends not only upon implant osseointegration, but also on the surrounding soft tissue health and profile. An ideal emergence profile contributes to the aesthetics of an implant restoration. It maintains long-term implant health by preventing potential food accumulation and forming a barrier against bacterial ingress. This article describes a method for obtaining an impression of implants that will capture the custom guided peri-implant soft tissue contours accurately, thus contributing to a final restoration with favorable aesthetics. We also describe a technique for reducing excess cement in a cement retained implant crown, thereby contributing to the health of the peri-implant tissues.


Assuntos
Cimentação , Humanos , Dente Suporte , Coroas , Projeto do Implante Dentário-Pivô , Prótese Dentária Fixada por Implante , Feminino , Implantes Dentários , Estética Dentária , Restauração Dentária Temporária , Implantação Dentária Endóssea/métodos , Pessoa de Meia-Idade , Técnica de Moldagem Odontológica
9.
Ann Surg ; 257(4): 679-85, 2013 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23299522

RESUMO

BACKGROUND: Ileal pouch anal anastomosis (IPAA) is the treatment of choice for chronic, medically refractory mucosal ulcerative colitis, indeterminate colitis, familial adenomatous polyposis (FAP), and a select group of patients with Crohn's disease. AIM: : We report outcomes, complications, and quality of life (QOL) in a cohort of 3707 patients treated at our institution from January 1984 to March 2010. METHODS: Data were collected from a prospectively maintained database and chart review of 3707 consecutive primary IPAA cases. Patient demographics, postoperative complications, functional outcomes, and QOL data were available. Follow-up consisted of clinical examination with assessment of pouch function and QOL. RESULTS: A total of 3707 patients underwent primary pouch and 328 underwent redo pouch surgery. Postoperative histopathological diagnoses were mucosal ulcerative colitis (n = 2953, 79.7%), indeterminate colitis (n = 63, 1.7%), FAP (n = 223, 6%), Crohn's disease (n = 150, 4%), cancer/dysplasia (n = 97, 2.6%), and others (n = 221, 6.0%). Early perioperative complications were encountered in 33.5% of patients with a mortality rate of 0.1%. Excluding pouchitis, late complications were experienced by 29.1% of patients. Of those patients who had IPAA at our institution, pouch failure occurred in 197 patients (5.3%). During a median follow-up of 84 months, 119 patients (3.2%) required excision of the pouch, 32 (0.8%) had a nonfunctioning pouch, and 46 patients (1.2%) had redo IPAA. Functional outcomes and QOL were good or excellent in 95% of patients and similar in each histopathological subgroup. CONCLUSIONS: IPAA is an excellent option for patients with MUC, IC, FAP, and select patients with Crohn's disease.


Assuntos
Bolsas Cólicas , Complicações Pós-Operatórias , Qualidade de Vida , Polipose Adenomatosa do Colo/cirurgia , Adulto , Canal Anal/cirurgia , Anastomose Cirúrgica , Colite/cirurgia , Colite Ulcerativa/cirurgia , Bolsas Cólicas/efeitos adversos , Doença de Crohn/cirurgia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Resultado do Tratamento
10.
Mol Vis ; 19: 501-8, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23441123

RESUMO

PURPOSE: Oxygen-induced retinopathy (OIR) is a robust animal model of human retinopathy of prematurity that readily allows changes in retinal gene and microRNA (miRNA) expression in response to fluctuations in oxygen levels to be studied. We sought to identify small non-coding RNA (ncRNA) genes that showed stable expression upon exposure to varying levels of oxygen, with different developmental stages and in different rat strains, to act as reference genes for normalizing miRNA expression in a rat model of OIR. METHODS: Expression of five small ncRNAs (U6 snRNA, miR-16, U87, 4.5S RNA (H) "Variant 1", and 5S ribosomal RNA [rRNA]) were tested on a standard RNA pool and representative retinal samples from P5, P6, P9, and P14 from room air- and cyclic hyperoxia-exposed rats using reverse transcription (RT)-qPCR, to assess the effect of developmental stage and exposure to fluctuations in oxygen levels, respectively. Two strains of inbred albino rats, Fischer 344 (F344, resistant to OIR) and Sprague-Dawley rats (SD, susceptible to OIR), were used to assess the effect of rat strain on the stability of the small ncRNAs. RESULTS: In this rat model of OIR, 5S rRNA expression was variable with strain, fluctuations in oxygen levels, and developmental stage. U6 snRNA was stably expressed with changes in oxygen levels, and minimal variation was observed with strain and developmental stage. MiR-16 showed less stable expression with changes in oxygen levels and between strains compared to U6 snRNA. Some variation in expression in response to developmental stage was also observed. The PCR amplification efficiencies of the U6 snRNA and miR-16 TaqMan assays were 56% and 78%, respectively. U87 and 4.5S RNA (H) "Variant 1" expression varied with strain, exposure to cyclic hyperoxia, and in particular developmental stage, and was at low levels in the neonatal rat retina. CONCLUSIONS: We conclude that U6 snRNA and miR-16 are the most suitable reference RNAs for normalizing miRNA expression, as they are relatively stable with strain, exposure to cyclic hyperoxia, and developmental stage in a rat model of OIR.


Assuntos
Hiperóxia/genética , Estabilidade de RNA/genética , Pequeno RNA não Traduzido/genética , Pequeno RNA não Traduzido/metabolismo , Retina/metabolismo , Animais , Animais Recém-Nascidos , Modelos Animais de Doenças , Regulação da Expressão Gênica no Desenvolvimento , Humanos , Hiperóxia/metabolismo , Recém-Nascido , Camundongos , Ratos , Ratos Endogâmicos F344 , Ratos Sprague-Dawley , Retina/crescimento & desenvolvimento , Retinopatia da Prematuridade/genética , Retinopatia da Prematuridade/metabolismo
11.
Orbit ; 32(2): 137-40, 2013 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23480695

RESUMO

IgG4 is a newly known systemic disorder. It can present as orbital inflammation or as an orbital mass. We describe the case of a 5-year-old child with proptosis and globe dystopia who went on to have an orbital biopsy. Initially this was reported to be idiopathic orbital inflammation. After IgG4-RD was considered in the differential, the orbital biopsy was revisited, immunohistochemistry was done and the patient's serum was tested for IgG subclass levels. IgG4-RD was diagnosed and the patient was subsequently treated with prednisone and mycophenolate and made a good recovery. This is the youngest reported case of IgG4-RD in a child.


Assuntos
Hipergamaglobulinemia/diagnóstico , Imunoglobulina G/sangue , Neoplasias Orbitárias/diagnóstico , Pseudotumor Orbitário/diagnóstico , Pré-Escolar , Diagnóstico Diferencial , Quimioterapia Combinada , Feminino , Humanos , Hipergamaglobulinemia/tratamento farmacológico , Hipergamaglobulinemia/imunologia , Imunossupressores/uso terapêutico , Imageamento por Ressonância Magnética , Ácido Micofenólico/análogos & derivados , Ácido Micofenólico/uso terapêutico , Neoplasias Orbitárias/tratamento farmacológico , Neoplasias Orbitárias/imunologia , Pseudotumor Orbitário/tratamento farmacológico , Pseudotumor Orbitário/imunologia , Plasmócitos/imunologia , Prednisona/uso terapêutico , Tomografia Computadorizada por Raios X
12.
Protein Sci ; 32(4): e4608, 2023 04.
Artigo em Inglês | MEDLINE | ID: mdl-36840926

RESUMO

Present understanding of protein structure dynamics trails behind that of static structures. A torsion-angle-based approach, called the representation of protein entities, derives an interpretable conformational space that correlates with data collection temperature, resolution, and reaction coordinate. For more complex systems, atomic coordinates fail to separate functional conformational states, which are still preserved by torsion angle-derived space. This indicates that torsion angles are often a more sensitive and biologically relevant descriptor for protein conformational dynamics than atomic coordinates.


Assuntos
Proteínas , Proteínas/química , Conformação Proteica
13.
J Int AIDS Soc ; 26(10): e26179, 2023 10.
Artigo em Inglês | MEDLINE | ID: mdl-37886843

RESUMO

INTRODUCTION: HIV controllers have low viral loads (VL) without antiretroviral treatment (ART). We evaluated viraemic control in a community-randomized trial conducted in Zambia and South Africa that evaluated the impact of a combination prevention intervention on HIV incidence (HPTN 071 [PopART]; 2013-2018). METHODS: VL and antiretroviral (ARV) drug testing were performed using plasma samples collected 2 years after enrolment for 4072 participants who were HIV positive at the start of the study intervention. ARV drug use was assessed using a qualitative laboratory assay that detects 22 ARV drugs in five drug classes. Participants were classified as non-controllers if they had a VL ≥2000 copies/ml with no ARV drugs detected at this visit. Additional VL and ARV drug testing was performed at a second annual study visit to confirm controller status. Participants were classified as controllers if they had VLs <2000 with no ARV drugs detected at both visits. Non-controllers who had ARV drugs detected at either visit were excluded from the analysis to minimize potential confounders associated with ARV drug access and uptake. RESULTS: The final cohort included 126 viraemic controllers and 766 non-controllers who had no ARV drugs detected. The prevalence of controllers among the 4072 persons assessed was 3.1% (95% confidence interval [CI]: 2.6%, 3.6%). This should be considered a minimum estimate, since high rates of ARV drug use in the parent study limited the ability to identify controllers. Among the 892 participants in the final cohort, controller status was associated with biological sex (female > male, p = 0.027). There was no significant association between controller status and age, study country or herpes simplex virus type 2 (HSV-2) status at study enrolment. CONCLUSIONS: To our knowledge, this report presents the first large-scale, population-level study evaluating the prevalence of viraemic control and associated factors in Africa. A key advantage of this study was that a biomedical assessment was used to assess ARV drug use (vs. self-reported data). This study identified a large cohort of HIV controllers and non-controllers not taking ARV drugs, providing a unique repository of longitudinal samples for additional research. This cohort may be useful for further studies investigating the mechanisms of virologic control.


Assuntos
Infecções por HIV , Humanos , Masculino , Feminino , Infecções por HIV/tratamento farmacológico , Infecções por HIV/epidemiologia , Infecções por HIV/prevenção & controle , África do Sul/epidemiologia , Zâmbia/epidemiologia , Antirretrovirais/uso terapêutico , Incidência , Viremia/tratamento farmacológico
14.
Vet Rec ; 190(3): e1269, 2022 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-34997973

RESUMO

BACKGROUND: There is a lack of literature concerning dairy farmers' use of veterinary services and how satisfied they are with them. This study aimed to fill this gap for seasonal calving UK herds, with a focus on fertility, and included farmer perceived barriers to veterinary involvement. METHODS: A cross-sectional questionnaire (convenience sample), with 166 useable responses. RESULTS: Opportunities exist for further veterinary involvement in seasonal herds. Areas vets are least involved in currently are nutrition, breeding and genetics, growth rate monitoring and infrastructure changes. Current veterinary input was rated neutral or poor value by 21% of respondents. Over 90% of farmers want vets to ask questions to elicit their needs. Frequently mentioned barriers were 'lack of veterinary knowledge of our system', 'not enough cost-benefit of veterinary involvement' and 'we get our fertility information elsewhere'. Along with clinical ability and being approachable, 'understanding our system' and being 'proactive' were qualities participants most valued in a vet. After cost, 'pushing sales and interventions' were the least liked. CONCLUSION: Findings highlight the critical importance of clearly demonstrating the full cost-benefit of veterinary services to farmers. The results contain many details concerning farmer perceptions and values that can help veterinary businesses to strengthen existing services and develop new services.


Assuntos
Indústria de Laticínios , Fazendeiros , Animais , Estudos Transversais , Indústria de Laticínios/métodos , Fertilidade , Humanos , Estações do Ano , Inquéritos e Questionários , Reino Unido
15.
J Coll Physicians Surg Pak ; 32(11): 1430-1434, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-36377010

RESUMO

OBJECTIVE: To study the correlation of cytogenetic and molecular abnormalities on induction chemotherapy in childhood acute lymphoblastic leukaemia (ALL). STUDY DESIGN: Analytical study. PLACE AND DURATION OF STUDY: Department of Haematology, Armed Forces Institute of Pathology (AFIP), from March 2021 to August 2021. METHODOLOGY: Patients aged 1-18 years with newly diagnosed acute lymphoblastic leukaemia were inducted. Patients aged less than 1 year and more than 18 years were excluded from the study. The diagnosis was based on morphology, cytochemistry, flow cytometry, and cytogenetic/molecular analysis. Risk stratification was done on the basis of age, TLC, and cytogenetic/molecular defects. The UKALL 2011 protocol was used for treatment with regimen-A for standard risk and regimen-B for high-risk patients. Bone marrow was repeated on day 29 of induction therapy and blast percentage was assessed to establish post-induction remission. Association between cytogenetic / molecular abnormalities and post-induction remission status was analysed using chi-square test. RESULTS: There were total 142 patients with mean age of 6.4 + 3.6 years and a male- to-female ratio of 2.7:1. Immunophenotyping revealed 85.9% cases as B-cell ALL and 14.1% as T-cell ALL. The most frequent cytogenetic and molecular abnormalities were hyperdiploidy (19%), t(9;22)/BCR-ABL1(p190) (10.6%), complex karyotype (5.6%), E2A-PBX1 (8.5%), and TEL-AML1 (4.9%). A total of 127/142 (89.4%) achieved haematological remission after induction therapy with two deaths during induction therapy (1.4%). Post-induction remission rate in patients with favorable cytogenetic/molecular defects was 100% and in children with bad prognostic changes, the rate of remission was 69.2%. Chi-square test showed a significant association between cytogenetic/molecular abnormalities and post-induction remission (p-value <0.001). CONCLUSION: Cytogenetic and molecular abnormalities have a significant association with post-induction remission in children with acute lymphoblastic leukaemia. KEY WORDS: Acute lymphoblastic leukaemia, Cytogenetics, Chemotherapy, Induction, Remission.


Assuntos
Quimioterapia de Indução , Leucemia-Linfoma Linfoblástico de Células Precursoras , Humanos , Criança , Masculino , Feminino , Pré-Escolar , Leucemia-Linfoma Linfoblástico de Células Precursoras/tratamento farmacológico , Leucemia-Linfoma Linfoblástico de Células Precursoras/genética , Leucemia-Linfoma Linfoblástico de Células Precursoras/patologia , Citogenética , Aberrações Cromossômicas , Análise Citogenética , Prognóstico , Indução de Remissão
16.
J Coll Physicians Surg Pak ; 32(10): 1367-1369, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-36205291

RESUMO

This study aimed to analyse the diagnostic accuracy of different laboratory parameters that can predict bone marrow metastasis. A cross-sectional analytical study was conducted at the Armed Forces Institute of Pathology (AFIP), Rawalpindi from March 2021 to August 2021. Bone marrow aspirates and biopsy procedures were done on 60 newly diagnosed cases of non-haematological malignancies as part of staging. Laboratory parameters noted for the study included peripheral blood smear findings, serum lactate dehydrogenase (LDH), radiological findings, and bone marrow aspirate/trephine biopsy results. Bone marrow metastasis was seen in 21/60 patients. The most common malignancies with bone marrow involvement were retinoblastoma and neuroblastoma. Laboratory findings showed no significant statistical difference in mean haemoglobin and total leukocyte count between cases and controls. Positive cases had a mean platelet count of 261.7 x 109/L and mean LDH of 750.1 U/L (p <0.05) for both parameters. ROC analysis showed the area under the curve (AUC) for LDH to be 0.969 (highly significant) showing a strong predictive value of LDH. Positive radiological findings were detected in only one case with bone marrow metastasis. The elevated level of serum LDH is not only cost-effective but also has high diagnostic accuracy to predict bone marrow metastasis. Key Words: Bone marrow, Biochemical, Lactate dehydrogenase, Metastasis, Non-haematological malignancies.


Assuntos
Neoplasias da Medula Óssea , Neoplasias Ósseas , Neuroblastoma , Neoplasias da Retina , Estudos Transversais , Humanos , Lactato Desidrogenases
17.
Contemp Nurse ; 37(2): 188-96, 2011 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-21692589

RESUMO

Accountability for the use of limited health resources requires quality information for ongoing monitoring of program effectiveness. We outline the challenges involved in the monitoring and evaluation of a large-scale community nurse home visiting program. Efforts to establish and maintain rigorous assessment were impaired by interrelated difficulties, impacting on the quality of information collected. The consequences and outcomes of these challenges are discussed. Recommendations to facilitate the monitoring and evaluation of community-based programs are made. Successful program monitoring and evaluation, guided by these recommendations, will support the ongoing review of program activities and evidence-based decision making to inform current operation and future planning.


Assuntos
Enfermagem em Saúde Comunitária/organização & administração , Pesquisa sobre Serviços de Saúde/métodos , Serviços de Assistência Domiciliar/organização & administração , Avaliação de Programas e Projetos de Saúde/métodos , Implementação de Plano de Saúde , Humanos , New South Wales , Projetos Piloto
18.
BMJ Open ; 11(12): e051561, 2021 12 20.
Artigo em Inglês | MEDLINE | ID: mdl-34930732

RESUMO

OBJECTIVE: Exploration of the factors that influence hospital doctors' antibiotic prescribing decisions when treating children with respiratory symptoms in UK emergency departments. METHODS: A qualitative study using semistructured interviews based on a critical incident technique with 21 physicians of different grades and specialties that treat children in the UK. Interviews were audio-recorded then transcribed verbatim and analysed using thematic analysis. RESULTS: Four themes were identified. These themes illustrate factors which influence clinician prescribing. The three principal themes were authorities, pressures and risk. The fourth transcending theme that ran through all themes was clinician awareness and complicity ('knowing but still doing'). CONCLUSIONS: Hospital doctors prescribe antibiotics even when they know they should not. This appears to be due to the influence of those in charge or external pressures experienced while weighing up the immediate and longer term risks but clinicians do this with full insight into their actions. These findings have implications for invested parties seeking to develop future antimicrobial stewardship programmes. It is recommended that stewardship interventions acknowledge and target these themes which may in turn facilitate behaviour change and antimicrobial prescribing practice in emergency departments.


Assuntos
Antibacterianos , Gestão de Antimicrobianos , Antibacterianos/uso terapêutico , Criança , Serviço Hospitalar de Emergência , Humanos , Padrões de Prática Médica , Pesquisa Qualitativa , Reino Unido
19.
Front Vet Sci ; 8: 709336, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34660757

RESUMO

It is economically essential, but challenging, for dairy farmers to manage bovine fertility. Vets can help farmers to improve fertility, and this is cost-effective bringing benefits for production, animal health and welfare, and the environment. However, the extent to which vets are involved in fertility varies considerably between farms, for reasons that are unclear. This study investigated the motivators and barriers that vets perceive when trying to increase their involvement with fertility management on UK dairy farms. Interviews were conducted with 20 vets and four themes identified. The first, "clinical baggage," highlighted vets' disillusionment due to past experiences of low uptake of their advice by farmers. Consequently, some vets made assumptions about farmer needs and behaviours, and exhibited ageist stereotyping. These issues, along with concerns and fatigue associated with repeatedly offering the same advice which was not acted upon, negatively influenced vets' engagement with farmers. The second theme "stuck in the comfort zone" revealed a loss of enthusiasm by some senior vets, whilst others lacked confidence to engage due to perceived gaps in their knowledge. Vets also reported farmers not perceiving their problems and lack of farm data or facilities, as barriers. The "vet-farmer relationship" theme highlighted building trust and developing strong relationships which were key drivers for vets to proactively engage and to "go the extra mile" for their clients. The final theme "money matters" explored vets' motivations to improve their clients' profitability and included the future sustainability of their own businesses. Our themes provide useful insight into the challenges vets face and provide key areas that can be targeted in future interventions to improve veterinary involvement in fertility management. For example, post-graduate training and support for vets needs to consider factors such as reflection, mentorship, stereotyping, relationships, communication, and leadership skills. This type of postgraduate support is currently limited for vets and requires investment from stakeholders if improvements in production, animal health and welfare, and the environment are to be achieved. Our findings are informative for facilitating veterinary involvement in any disease context, and are relevant for stakeholders including governments, educators, charities, farmer representatives, environmentalists, and veterinary leaders.

20.
J Addict Nurs ; 32(1): E1-E10, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33646723

RESUMO

BACKGROUND: Opioid replacement therapy (ORT) offers a harm minimization approach and is the mainstay treatment option for opioid dependence in Australia. Recovery is known to be complicated because of service access, cost, workforce availability, privacy, stigma, and discrimination. Rural living is considered to magnify each complication of recovery, yet little is understood about how opioid dependence recovery is experienced in rural Australia. This study aimed to explore the lived experience of people receiving ORT in rural Australia and describe impediments to recovery. METHODS: In this qualitative study design, all outpatients enrolled in ORT at two rural Australian sites were invited to participate. Six volunteers from each site participated in a semistructured interview (eight men, four women; mean age = 44.8 years). RESULTS: The participants had completed 3 years of secondary school education on average. Four major themes emerged: reinvention, restriction, employment, and reconnection. Small communities increased the likelihood of ORT participants knowing people both directly and indirectly, affecting their ability to reconstruct an identity. Lived distance from prescribers and dosing points dictated daily activity, including opportunities to seek and maintain employment. Rural ORT treatment seekers indicated that geographical displacement and separation from family, the people they needed to reconnect with, were challenging. CONCLUSION: Rural people engaged in ORT require positive reinforcement from service providers, enabling identity reinvention and disconnection from the drug-seeking world. Acknowledging underlying trauma and supporting reconnection with loved ones may foster positive social connectedness.


Assuntos
Tratamento de Substituição de Opiáceos , Transtornos Relacionados ao Uso de Opioides , Adulto , Austrália , Feminino , Humanos , Masculino , Transtornos Relacionados ao Uso de Opioides/tratamento farmacológico , Pesquisa Qualitativa , População Rural
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