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1.
Front Plant Sci ; 15: 1397617, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39081528

RESUMO

Fusarium wilt of banana (FWB), caused by the soil-borne fungus Fusarium oxysporum f. sp. cubense (Foc), poses an undeniable threat to global banana production. This disease has intensified in recent years, with the tropical race 4 (TR4) strain spreading rapidly. Since 2018, the number of affected countries has increased from 16 to 23, presenting a significant challenge to researchers, producers, and National Plant Protection Organizations (NPPOs) worldwide. The potential impact of TR4 in Latin America and the Caribbean (LAC) is particularly concerning. This region boasts seven of the top ten banana-exporting countries, and bananas and plantains are crucial for food security and income generation. In Colombia, where TR4 was detected in 2019, the disease has already spread from La Guajira to Magdalena, and it is currently affecting 20 large commercial export farms. In Peru, the disease was detected in 2021 and although still restricted to the northern region, flood irrigation and heavy rains associated with the Yaku cyclone, boosted pathogen spread, and more than 400 small organic banana farmers are currently affected. In Venezuela, TR4 detection occurred in 2023, with plantations across three states and five municipalities now affected. Worryingly, TR4 has also been confirmed in plantains, a staple food in the region. Current national responses in LAC primarily rely on preventive and reactive measures: preventing initial incursions and containing outbreaks to avoid further spread. However, the disease's relentless progression suggests that its eventual presence in all banana-producing areas is likely. Therefore, exploring alternative management approaches beyond pathogen exclusion becomes crucial, both in affected and disease-free regions. This paper examines the current spread of TR4, focusing on epidemiological aspects and recent research-based management options. Key epidemiological features were highlighted, drawing practical examples from various scales (plots to landscapes) and utilizing experiences from LAC's fight against TR4. The paper also reviews field-tested approaches in biosecurity, biological control, resistant varieties, soil health, and integrated disease management, acknowledging the specific challenges faced by smallholder settings. In each section research initiatives were analyzed, identifying gaps, and proposing directions to minimize TR4 impact and accelerate the development of sustainable solutions for managing this devastating disease.

2.
Pharmaceutics ; 16(6)2024 May 23.
Artigo em Inglês | MEDLINE | ID: mdl-38931824

RESUMO

The treatment of skin and soft tissue infections (SSTIs) can be challenging due to bacterial resistance, particularly from strains like MRSA and biofilm formation. However, combining conventional antibiotics with natural products shows promise in treating SSTIs. The objective of this study is to develop a nanoemulsion-based hydrogel containing Protium spruceanum extract and mupirocin and evaluate its potential for the treatment of SSTIs. The nanoemulsion was obtained by phase inversion and subsequently characterized. The antibacterial activity was evaluated in vitro against S. aureus MRSA, including the synergism of the combination, changes in membrane permeability using flow cytometry, and the anti-biofilm effect. In addition, the irritative potential was evaluated by the HET-CAM assay. The combination exhibited synergistic antibacterial activity against S. aureus and MRSA due to the extract enhancing membrane permeability. The hydrogel demonstrated suitable physicochemical properties, inhibited biofilm formation, and exhibited low irritation. The formulation was nanometric (176.0 ± 1.656 nm) and monodisperse (polydispersity index 0.286 ± 0.011). It exhibited a controlled release profile at 48 h and high encapsulation efficacy (94.29 ± 4.54% for quercitrin and 94.20 ± 5.44% for mupirocin). Therefore, these findings suggest that the hydrogel developed could be a safe and effective option for treating SSTIs.

3.
Artigo em Inglês | MEDLINE | ID: mdl-38698601

RESUMO

BACKGROUND: Lung cancer is the leading cause of cancer-related deaths, and surgery is still the first treatment of choice in early and locally advanced cases. One of the iatrogenic complications is the serratus anterior palsy, which could lead to a winged scapula (WS). Unfortunately, the incidence of this deficit in thoracic surgery is unclear. Our primary aim was to determine the incidence of WS in lung cancer patients in a single-center experience. METHODS: We conducted a retrospective analysis of prospectively collected data with patients eligible for oncological thoracic surgery from March 2013 until January 2014. A physical evaluation of the WS was performed pre- and postoperatively, at the discharge and after 1 year of follow-up. RESULTS: A total of 485 patients were evaluated; 135 (27.8%) showed WS. Longer operative time (p < 0.0001), type of surgery (p < 0.0001), lymphadenectomy (p < 0.0001), and neoadjuvant treatment prior surgery (p = 0.0005) were significantly related to the WS injury. Multivariable analysis showed that type of surgery was significantly associated with WS (p < 0.0001). After 1 year, 41.6% still had WS. CONCLUSION: The incidence of WS was similar to the literature. As WS incidence is underdiagnosed, assessment and correct education about possible deficits or impairments should be improved. Moreover, when a minimally invasive approach is not planned, it is a good clinical practice to discuss surgical strategies with surgeons to reduce this deficit.

4.
Nanomedicine (Lond) ; 19(14): 1285-1296, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38722243

RESUMO

Aim: To investigate whether medical devices coated with a synthesized nanocomposite of poly(methylmethacrylate-co-dimethyl acrylamide) (PMMDMA) and silver nanoparticles (AgNPs) could improve their antibiofilm and antimicrobial activities. We also investigated the nanocomposite's safety. Materials & methods: The nanocomposite was synthesized and characterized using analytical techniques. Medical devices coated with the nanocomposite were evaluated for bacterial adhesion and hemolytic activity in vitro. Results: The nanocomposite formation was demonstrated with the incorporation of AgNPs into the polymer matrix. The nanocomposite proved to be nonhemolytic and significantly inhibited bacterial biofilm formation. Conclusion: The PMMDMA-AgNPs nanocomposite was more effective in preventing biofilm formation than PMMDMA alone and is a promising strategy for coating medical devices and reducing mortality due to hospital-acquired infections.


[Box: see text].


Assuntos
Biofilmes , Nanopartículas Metálicas , Nanocompostos , Prata , Biofilmes/efeitos dos fármacos , Prata/química , Prata/farmacologia , Nanocompostos/química , Nanopartículas Metálicas/química , Humanos , Antibacterianos/farmacologia , Antibacterianos/química , Aderência Bacteriana/efeitos dos fármacos , Equipamentos e Provisões/microbiologia , Hemólise/efeitos dos fármacos , Acrilamidas/química , Acrilamidas/farmacologia
6.
Hist Cienc Saude Manguinhos ; 31: e2024004, 2024.
Artigo em Português | MEDLINE | ID: mdl-38597562

RESUMO

This material is the result of an interview with José Augusto Alves de Britto, a physician who served as director of the Fernandes Figueira Institute from 2001 to 2008. It covers different aspects of the history of the institution, such as research development, health care, and transformations in the daily routine there. It is part of a project to document and investigate the history of the Fernandes Figueira Institute, which celebrates its one hundredth anniversary in 2024.


O depoimento resulta de entrevista realizada com José Augusto Alves de Britto, médico pediatra que ocupou o cargo de diretor do Instituto Fernandes Figueira entre 2001 e 2008. O relato do depoente aborda diferentes aspectos da história do instituto, como o desenvolvimento da pesquisa e do cuidado à saúde e transformações no cotidiano institucional. O depoimento faz parte de um projeto que documenta e investiga a história do Instituto Fernandes Figueira, que completa seu centenário em 2024.


Assuntos
Instalações de Saúde , Médicos , Humanos , Academias e Institutos , Atenção à Saúde
7.
J Pharm Pharmacol ; 76(6): 732-742, 2024 Jun 06.
Artigo em Inglês | MEDLINE | ID: mdl-38546507

RESUMO

OBJECTIVES: Angico gum (AG) (Anadenanthera colubrina var. Cebil [Griseb.] Altschul) is utilized by some Brazilian communities to alleviate symptoms from gastroesophageal reflux disease. Here, we aimed to investigate the "in vitro" topical protective capacity of AG on human esophageal mucosa. METHODS: Biopsies of the distal esophageal mucosa were collected from 35 patients with heartburn (24 non-erosive and 11 with erosive oesophagitis (EE)) and mounted in Üssing chambers. AG was applied topically, followed by exposure with acid solution (pH 2.0 or pH 1.0), where transepithelial electrical resistance (TER) and The transepithelial permeability for fluorescein was assessed. The incubation of the AG labeled with FITC in the esophageal mucosa was localized by fluorescence microscopy. KEY FINDINGS: Pretreatment with AG prevented the drop in TER induced by acid solution, as well as significantly decreases the fluorescein permeability in non-erosive patients. The protective effect of AG was sustained for up to 120 min both in biopsies of non-erosive and erosive esophagitis. Confocal microscope images showed mucosal luminal adherence of FITC-labeled AG. CONCLUSION: AG had a prolonged topical protective effect against acid solution in mucosal biopsies of patients with non-erosive and erosive esophagitis.


Assuntos
Mucosa Esofágica , Refluxo Gastroesofágico , Humanos , Refluxo Gastroesofágico/tratamento farmacológico , Refluxo Gastroesofágico/prevenção & controle , Mucosa Esofágica/efeitos dos fármacos , Mucosa Esofágica/patologia , Mucosa Esofágica/metabolismo , Masculino , Feminino , Pessoa de Meia-Idade , Adulto , Permeabilidade , Impedância Elétrica , Administração Tópica , Biopolímeros , Idoso , Fluoresceína/administração & dosagem , Esôfago/efeitos dos fármacos , Esôfago/patologia , Esôfago/metabolismo , Azia/tratamento farmacológico , Azia/prevenção & controle , Relevância Clínica
8.
Mol Biol Rep ; 51(1): 458, 2024 Mar 29.
Artigo em Inglês | MEDLINE | ID: mdl-38551694

RESUMO

Arterial hypertension is characterized by systolic pressure ≥ 140 mmHg and/or diastolic pressure ≥ 90 mmHg and its treatment consists of the use of antihypertensive drugs, as losartan and hydrochlorothiazide. Blood pressure is regulated by angiotensin-converting enzyme (ACE) and polymorphisms in the ACE gene are associated to a greater predisposition to hypertension and response to treatment. The aim of this study was to evaluate the association of genetic polymorphisms of ACE rs4363, rs4291 and rs4335 and the response to antihypertensive drugs in hypertensive patients from Ouro Preto/MG, Brazil. A case-control study was carried out with 87 hypertensive patients being treated with losartan and 75 with hydrochlorothiazide, who answered a questionnaire and had blood samples collected. Biochemical analyzes were performed on serum using UV/Vis spectrophotometry and identification of ACE variants rs4363, rs4291 and rs4335 was performed by real-time PCR using the TaqMan® system. Univariate logistic regression test was performed to compare categorical data in STATA 13.0 software. The results showed that there was an influence of ACE polymorphisms on the response to losartan, demonstrating that AT or TT genotypes of rs4291 were more frequent in the group of controlled AH (54.9%), indicating that these individuals are 2.8 times more likely to of being controlled AH (95% CI 1.12-6.80, p. =0.026) compared to those with AA genotype. In contrast, no influence of ACE polymorphisms on the response to hydrochlorothiazide was observed. In conclusion, the presence of the T allele of the rs4291 variant was associated to controled blood pressure when losartan was used as an antihypertensive agent. These results show the importance of pharmacogenetic studies to detect genetic characteristics, enabling therapeutic individuality and reducing costs for the healthcare system.


Assuntos
Anti-Hipertensivos , Hipertensão , Losartan , Peptidil Dipeptidase A , Humanos , Anti-Hipertensivos/uso terapêutico , Anti-Hipertensivos/farmacologia , Pressão Sanguínea/genética , Estudos de Casos e Controles , Hidroclorotiazida/uso terapêutico , Hidroclorotiazida/farmacologia , Hipertensão/tratamento farmacológico , Hipertensão/genética , Losartan/uso terapêutico , Losartan/farmacologia , Polimorfismo de Nucleotídeo Único/genética , Peptidil Dipeptidase A/genética
10.
Rio de Janeiro; Outras Letrs; 2024. 295 p.
Monografia em Português | LILACS | ID: biblio-1556360

RESUMO

Este trabalho tem como objetivo primordial homenagear a instituição que, nesse momento, celebra seu centenário. No entanto, mais do que apenas uma narrativa institucional, visa preencher uma lacuna historiográfica significativa em relação à Fiocruz


Assuntos
Saúde da Criança , Saúde da Mulher , Saúde do Adolescente , Serviços de Saúde Materno-Infantil , Hospitais de Ensino
12.
Hist. ciênc. saúde-Manguinhos ; 31: e2024004, 2024.
Artigo em Português | LILACS-Express | LILACS | ID: biblio-1557924

RESUMO

Resumo O depoimento resulta de entrevista realizada com José Augusto Alves de Britto, médico pediatra que ocupou o cargo de diretor do Instituto Fernandes Figueira entre 2001 e 2008. O relato do depoente aborda diferentes aspectos da história do instituto, como o desenvolvimento da pesquisa e do cuidado à saúde e transformações no cotidiano institucional. O depoimento faz parte de um projeto que documenta e investiga a história do Instituto Fernandes Figueira, que completa seu centenário em 2024.


Abstract This material is the result of an interview with José Augusto Alves de Britto, a physician who served as director of the Fernandes Figueira Institute from 2001 to 2008. It covers different aspects of the history of the institution, such as research development, health care, and transformations in the daily routine there. It is part of a project to document and investigate the history of the Fernandes Figueira Institute, which celebrates its one hundredth anniversary in 2024.

13.
Arq Bras Cardiol ; 120(12): e20230396, 2023 Dec.
Artigo em Português, Inglês | MEDLINE | ID: mdl-38126445

RESUMO

BACKGROUND: Central Illustration : G Protein Subunit Beta 3 (GNB3) Variant Is Associated with Biochemical Changes in Brazilian Patients with Hypertension. BACKGROUND: Genes and their variants associated with environmental factors contribute to the development of the hypertensive phenotype. The G protein beta 3 subunit gene (GNB3) is involved in the intracellular signaling process, and its variants have been related to susceptibility to arterial hypertension. OBJECTIVE: To determine the association of the GNB3 variant (rs5443:C>T) with arterial hypertension, biochemical parameters, age, and obesity in hypertensive and normotensive individuals from Ouro Preto, Minas Gerais, Brazil. METHOD: The identification of variants was performed by real-time PCR, using the TaqMan® system, in 310 samples (155 hypertensive and 155 normotensive). Biochemical analyses (renal function, lipid profile and glycemia) were performed from the serum using UV/Vis spectrophotometry and ion-selective electrode. A multiple logistic regression model was used to identify factors associated with arterial hypertension. The analysis of continuous variables with normal distribution was performed using the unpaired Student's t test; non-normal data were analyzed using Mann-Whitney. P < 0.05 was considered significant. RESULTS: The rs5443:C>T variant was not associated with arterial hypertension in the evaluated population (p = 0.88). Regarding biochemical measures, the T allele was associated with high levels of triglycerides, glucose and uric acid in hypertensive individuals (p < 0.05). CONCLUSION: These results show the importance of genetic diagnosis to prevent the causes and consequences of diseases and imply that the GNB3 rs5443:C>T variant may be associated with changes in the biochemical profile in hypertensive individuals.


Assuntos
Proteínas Heterotriméricas de Ligação ao GTP , Hipertensão , Humanos , Alelos , Pressão Sanguínea/genética , Brasil , Genótipo , Hipertensão/genética , Subunidades Proteicas/genética , Proteínas Heterotriméricas de Ligação ao GTP/genética
14.
Arq. bras. cardiol ; 120(12): e20230396, dez. 2023. tab, graf
Artigo em Português | LILACS-Express | LILACS | ID: biblio-1527796

RESUMO

Resumo Fundamento Genes e suas variantes associadas a fatores ambientais contribuem para o desenvolvimento do fenótipo hipertenso. O gene da subunidade beta 3 da proteína G ( GNB3 ) está envolvido no processo de sinalização intracelular e suas variantes têm sido relacionadas à suscetibilidade à hipertensão arterial. Objetivo Determinar a associação da variante GNB3 (rs5443:C>T) com a hipertensão arterial, parâmetros bioquímicos, idade e obesidade em indivíduos hipertensos e normotensos de Ouro Preto, Minas Gerais. Método A identificação das variantes foi realizada por PCR em tempo real, utilizando o sistema TaqMan®, em amostras de 310 pacientes (155 hipertensos e 155 normotensos). Análises bioquímicas (função renal, perfil lipídico e glicemia) foram realizadas a partir do soro por meio de espectrofotometria UV/Vis e eletrodo íon-seletivo. Foi utilizado um modelo de regressão logística múltipla para identificar fatores associados à hipertensão arterial. A análise das variáveis contínuas com distribuição normal foi realizada usando o teste t de Student não pareado; dados não normais foram analisados usando o teste de Mann-Whitney. Valores de p < 0,05 foram considerados significativos. Resultados A variante rs5443:C>T não esteve associada à hipertensão arterial na população avaliada (p = 0,88). Em relação às medidas bioquímicas, o alelo T esteve associado a níveis elevados de triglicerídeos, glicose e ácido úrico em indivíduos hipertensos (p < 0,05). Conclusão Os presentes resultados mostram a importância do diagnóstico genético para prevenir as causas e consequências de doenças e sugerem que a variante GNB3 rs5443:C>T pode estar associada a alterações no perfil bioquímico em indivíduos hipertensos.


Abstract Background Genes and their variants associated with environmental factors contribute to the development of the hypertensive phenotype. The G protein beta 3 subunit gene (GNB3) is involved in the intracellular signaling process, and its variants have been related to susceptibility to arterial hypertension. Objective To determine the association of the GNB3 variant (rs5443:C>T) with arterial hypertension, biochemical parameters, age, and obesity in hypertensive and normotensive individuals from Ouro Preto, Minas Gerais, Brazil. Method The identification of variants was performed by real-time PCR, using the TaqMan® system, in 310 samples (155 hypertensive and 155 normotensive). Biochemical analyses (renal function, lipid profile and glycemia) were performed from the serum using UV/Vis spectrophotometry and ion-selective electrode. A multiple logistic regression model was used to identify factors associated with arterial hypertension. The analysis of continuous variables with normal distribution was performed using the unpaired Student's t test; non-normal data were analyzed using Mann-Whitney. P < 0.05 was considered significant. Results The rs5443:C>T variant was not associated with arterial hypertension in the evaluated population (p = 0.88). Regarding biochemical measures, the T allele was associated with high levels of triglycerides, glucose and uric acid in hypertensive individuals (p < 0.05). Conclusion These results show the importance of genetic diagnosis to prevent the causes and consequences of diseases and imply that the GNB3 rs5443:C>T variant may be associated with changes in the biochemical profile in hypertensive individuals.

15.
Acta Oncol ; 62(8): 969-976, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-37750301

RESUMO

PURPOSE: Axillary Web Syndrome (AWS) is a common sequela after surgical axillary lymph node dissection (ALND) often manifesting with reduced range of motion (ROM) of the limb, which requires rehabilitation. Notwithstanding, a standardized rehabilitation protocol is currently lacking in clinical practice. Our primary objective was therefore to evaluate the effectiveness of the use of a snapping manual maneuver (SMM, used in our clinical practice) to increase ROM during abduction (ABD) when compared with a standardized stretching exercise (SSE) protocol. A three-year follow-up of the enrolled patients was also carried out to determine the incidence of Breast Cancer-Related Lymphedema (BCRL). MATERIALS AND METHODS: Between July 2013 and January 2019, we conducted a single-blinded randomized clinical trial. A total of 60 patients, who underwent ALND in our hospital, came to our clinic under medical advice or on voluntary access and reported AWS symptoms. The patients were randomly assigned into two equally divided groups. The treatment of group one consists in the execution of a supervised SSEs protocol, while group two additionally received a manual snapping maneuver. Patients of both groups received two treatment sessions within two weeks. At the end of the session, they were asked to continue the exercises autonomously on a daily basis, three times per day, for one month. RESULTS: There were no statically significant differences in ROM at our one-month follow-up and the incidence of BCRL was equally distributed after three years. CONCLUSIONS: The use of the manual snapping maneuver in addition to stretching once per week for two weeks does not appear to improve the outcome of the patients in comparison with stretching alone and does not appear to be related to lymphedema in our 3 years follow-up.


Assuntos
Linfedema , Ombro , Humanos , Progressão da Doença , Exercício Físico , Extremidades , Linfedema/etiologia , Linfedema/terapia , Amplitude de Movimento Articular , Axila
16.
Hist Cienc Saude Manguinhos ; 30(suppl 1): e2023040, 2023 08.
Artigo em Português | MEDLINE | ID: mdl-37672428

RESUMO

This article addresses the Brazilian government's response to the covid-19 pandemic, particularly the public health surveillance and epidemic intelligence system. It traces the evolution of disease surveillance as a response to the International Health Regulations in the context of global health. Executive orders published in the official gazette, Diário Oficial da União, are analyzed, as well as the actors and groups formed to tackle the pandemic between January 2020 and March 2022. The founding assumption is that epidemic intelligence must be placed at the service of public health. Bureaucratic tension and changes in protagonism among different groups can be observed as these intelligence mechanisms were dismantled.


O artigo aborda a resposta do governo brasileiro à pandemia da covid-19, enfatizando o sistema de vigilância em saúde e de inteligência epidemiológica. Retoma a evolução da vigilância em resposta às normas do Regulamento Sanitário Internacional, no contexto da saúde global. Analisa os atos do Executivo publicados no Diário Oficial da União e se detém nos atores e grupos formados para o enfrentamento da pandemia da covid-19 de janeiro de 2020 até março de 2022. Parte da premissa de que a inteligência epidemiológica deve estar a serviço da saúde pública. Constata-se que certo tensionamento burocrático e a transferência de protagonismo entre grupos marcam o desmonte dos mecanismos de inteligência.


Assuntos
COVID-19 , Humanos , COVID-19/epidemiologia , COVID-19/prevenção & controle , Brasil/epidemiologia , Pandemias/prevenção & controle , Vigilância em Saúde Pública , Saúde Pública
17.
Rev Bras Ortop (Sao Paulo) ; 58(4): e653-e658, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-37663191

RESUMO

Objective We aim to describe an experimental model for studying femoral fractures in rats after exposure to ionizing radiation, demonstrating a way to apply a substance for analysis, the method for patterning fracture and irradiation, and how to evaluate its effectiveness based on radiographic studies. Methods We used 24 rats divided into 2 groups of 12 animals each. The STUDY group was exposed to ionizing radiation and treated with saline solution, and the CONTROL group was not exposed to radiation and was treated with saline solution. All animals were subjected to standardized fracture of the right femur that was fixed with intramedullary wire. The efficiency of the bone union was assessed by radiographic exam. Results Fracture healing was more efficient in bones not exposed to ionizing radiation ( p = 0.012). All fractures met the criteria of being simple, diaphyseal, transverse or short oblique. Conclusion The experimental model presented is an efficient alternative for the study of fractures in irradiated bones in rats.

18.
Cell Mol Biol (Noisy-le-grand) ; 69(6): 8-14, 2023 Jun 30.
Artigo em Inglês | MEDLINE | ID: mdl-37605597

RESUMO

Renal cell carcinoma (RCC) is the most common adult renal epithelial cancer, accounting for more than 90% of all renal neoplasms. Clear cell RCC (ccRCC) is the most common subtype of RCC. Most patients with ccRCC have a mutation in the von Hippel-Lindau (VHL) tumor suppressor gene, which encodes a protein that downregulates various intracellular proteins, including hypoxia-inducible factor (HIF). Many molecules have been identified to be responsible for the aggressive phenotype of ccRCC, including the transcription factor nuclear factor kappa B (NF-кB). The increase in NF-кB activity observed in RCC is correlated with an increase in angiogenesis markers, such as interleukin 6 (IL-6). In recent years, several groups have demonstrated the functional role of NF-кB1 in RCC tumorigenicity. Herein, we used the CRISPR/Cas-9 technique to obtain an NF-кB1 knockout-human renal adenocarcinoma cell line. Expression of IL-6 at the mRNA and protein levels was analyzed under normoxia and hypoxia by real time-polymerase chain reaction and multiplex assay, respectively. The CRISPR/Cas9 technique was effective in producing 786-0 knockout cells for NF-κB1 (p105/p50), as confirmed by western blot analysis. Suppression of p50 expression in 786-0 single guide RNA (sg)1, 786-0 sg2 and 786-0 sg3 cells downregulated IL-6 mRNA and protein expression under normoxia and hypoxia. The observed decrease in the differential expression of IL-6 in hypoxia/normoxia is suggestive of a change in cellular responsiveness to hypoxia with respect to IL-6.


Assuntos
Carcinoma de Células Renais , Traumatismos Craniocerebrais , Neoplasias Renais , Adulto , Humanos , Carcinoma de Células Renais/genética , Interleucina-6/genética , NF-kappa B/genética , Neoplasias Renais/genética , Hipóxia
19.
Rev. bras. ortop ; 58(4): 653-658, July-Aug. 2023. tab, graf
Artigo em Inglês | LILACS | ID: biblio-1521805

RESUMO

Abstract Objective We aim to describe an experimental model for studying femoral fractures in rats after exposure to ionizing radiation, demonstrating a way to apply a substance for analysis, the method for patterning fracture and irradiation, and how to evaluate its effectiveness based on radiographic studies. Methods We used 24 rats divided into 2 groups of 12 animals each. The STUDY group was exposed to ionizing radiation and treated with saline solution, and the CONTROL group was not exposed to radiation and was treated with saline solution. All animals were subjected to standardized fracture of the right femur that was fixed with intramedullary wire. The efficiency of the bone union was assessed by radiographic exam. Results Fracture healing was more efficient in bones not exposed to ionizing radiation (p = 0.012). All fractures met the criteria of being simple, diaphyseal, transverse or short oblique. Conclusion The experimental model presented is an efficient alternative for the study of fractures in irradiated bones in rats.


Resumo Objetivo Nosso objetivo é descrever um modelo experimental para estudo de fraturas de fêmur em ratos após exposição a radiação ionizante, demonstrando uma forma de aplicação de uma substância para análise, o método de padronização de fratura e irradiação e a forma de avaliação de sua eficácia com base em estudos radiográficos. Métodos Utilizamos 24 ratos divididos em dois grupos de 12 animais cada. O grupo ESTUDO foi exposto à radiação ionizante e tratado com soro fisiológico, enquanto o grupo CONTROLE não foi exposto à radiação e foi tratado com soro fisiológico. Todos os animais foram submetidos à fratura padronizada do fêmur direito e sua fixação com fio intramedular. A eficácia da consolidação óssea foi determinada por exame radiográfico. Resultados A cicatrização de fraturas foi mais eficiente em ossos não expostos à radiação ionizante (p = 0,012). Todas as fraturas atenderam aos critérios de serem simples, diafisárias, transversas ou oblíquas curtas. Conclusão O modelo experimental apresentado é uma boa alternativa para o estudo de fraturas em ossos irradiados em ratos.


Assuntos
Animais , Ratos , Efeitos da Radiação , Consolidação da Fratura , Fraturas do Fêmur/cirurgia , Fraturas Espontâneas/terapia
20.
Rev Bras Ortop (Sao Paulo) ; 58(3): 368-377, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-37396088

RESUMO

The increase in life expectancy of the world population has led to a concomitant increase in the prevalence of multiple myeloma (MM), a disease that usually affects the elderly population. Bone lesions are frequent in patients with this condition, demanding an early approach, from drug treatment, through radiotherapy to orthopedic surgery (prophylactic or therapeutic) with the objective of preventing or delaying the occurrence of fracture, or, when this event has already occurred, treat it through stabilization or replacement (lesions located in the appendicular skeleton) and/or promote stabilization and spinal cord decompression (lesions located in the axial skeleton), providing rapid pain relief, return to ambulation and resocialization, returning quality of life to patients. The aim of this review is to update the reader on the findings of pathophysiology, clinical, laboratory and imaging, differential diagnosis and therapeutic approach of multiple myeloma bone disease (MMBD).

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