Avaliação da adesão ao tratamento com Tamoxifeno por mulheres com câncer de mama / Tamoxifen treatment adherence assessment by women breast cancer / Evalución de adherencia al tratamento com Tamoxifeno em mujeres com cáncer de seno

Justificativa e objetivos: A terapia antineoplásica oral apresenta vantagens comparada a outras terapias para o tratamento do câncer, por ser administrada em domicílio, de forma simples e rápida, no entanto, essa terapia aumenta a responsabilidade do paciente em relação ao seu tratamento e a adesão é fundamental para a sua eficácia. Evidenciam-se poucos estudos referente ao acompanhamento farmacoterapêutico na terapia antineoplásica oral, nesses contexto, o presente estudo busca avaliar a adesão ao tratamento com tamoxifeno em mulheres com câncer de mama, antes e após acompanhamento farmacoterapêutico. Métodos: Trata-se de um estudo clínico randomizado e quantitativo. A coleta de dados foi realizada durante seis meses. A randomização aleatória dividiu-se em Grupo Controle e Grupo Acompanhamento, sendo o acompanhamento subdividido: Antes e Após o Acompanhamento. O Grupo acompanhamento recebeu mensalmente intervenções farmacêuticas individuais. A adesão foi avaliada pelo Brief Medication Questionnair e Problemas Relacionados aos Medicamentos quanto Necessidade, Efetividade e Segurança. Resultados: Após acompanhamento farmacêutico observou-se diferença entre os grupos Grupo Acompanhamento e Grupo Controle quanto à prática de atividade física (p=0,043), adesão ao tratamento (p=0,006), redução de efeitos adversos (p=0,003) e doenças associadas (p=0,002). Os Problemas Relacionados a Medicamentos mais frequentes foram de segurança e adesão, para os quais foram realizadas 54 intervenções farmacêuticas. As reações adversas descritas pelas pacientes acometiam principalmente sistema genital e trato gastrintestinal. Conclusão: Evidenciou-se que o acompanhamento farmacoterapêutico contribuiu efetivamente na adesão ao tratamento com tamoxifeno e as intervenções farmacêuticas realizadas contribuíram para prevenção e redução dos problemas associados a farmacoterapia.(AU)

Background and objectives: Oral antineoplastic therapy has advantages compared to other therapies for the treatment of cancer, because it is administered at home, in a simple and fast, however, this therapy increases the responsibility of the patient regarding its treatment and adherence is critical to its effectiveness. There are few studies on pharmacotherapeutic monitoring in oral antineoplastic therapy. In this context, the present study aims to evaluate to adherence with tamoxifen in women with breast cancer, before and after of pharmaceutical care. Methods: It is a randomized and quantitative clinical study. Data collection was performed during six months. Random randomization was divided into Control Group and Monitoring Group. The follow-up was subdivided: Before and After Monitoring. The Monitoring Group received monthly individual pharmaceutical interventions. Adherence was assessed by the Brief Medication Questionnaire and Drug Related Problems as Need, Effectiveness, and Safety. Results: There was a significant difference between the follow-up group and control group regarding physical activity (p = 0.043), adherence to treatment (p = 0.006), reduction of adverse effects (p = 0.003) and associated diseases (p = 0.002). The most frequent drug-related problems were safety and adherence, for which 54 pharmaceutical interventions were performed. The adverse reactions described by the patients mainly affected the genital system and the gastrointestinal tract. Conclusion: It was evidence the pharmaceutical care effectively contributed to the adherence to tamoxifen treatment and the performed pharmaceutical interventions contributed to the prevention and reduction of the problems associated with phamacoterapy.(AU)

Justificación y objetivo: La terapia antineoplásica oral presenta ventajas comparadas a otras terapias para el tratamiento del cáncer, por ser administrada a domicilio, de forma simple y rápida, sin embargo, esta terapia aumenta la responsabilidad del paciente en relación a su tratamiento y la adhesión es fundamental para su eficacia. Se evidencian pocos estudios referentes al seguimiento farmacoterapéutico en la terapia antineoplásica oral, en ese contexto, el presente estudio busca evaluar la adhesión al tratamiento con tamoxifeno en mujeres con cáncer de mama, antes y después de seguimento farmacoterapéutico. Métodos: Se trata de un estudio clínico aleatorizado y cuantitativo. La recolección de datos se realizó durante seis meses. La aleatorización aleatoria se dividió en Grupo Control y Grupo Seguimiento, siendo el acompañamiento subdividido: Antes y Después del Acompañamiento. El Grupo de seguimiento recibió mensualmente intervenciones farmacéuticas individuales. La adhesión fue evaluada por el Brief Medication Questionnair y los problemas relacionados con los medicamentos como la necesidad, la eficacia y la seguridad. Resultados: Después del seguimiento farmacéutico se observó diferencia entre los grupos Grupo Acompañamiento y Grupo Control en cuanto a la práctica de actividad física (p = 0,043), adhesión al tratamiento (p = 0,006), reducción de efectos adversos (p = 0,003) y enfermidades asociadas (p = 0,003) p = 0,002). Los problemas relacionados con los medicamentos más frecuentes fueron de seguridad y adhesión, para los que se realizaron 54 intervenciones farmacéuticas. Las reacciones adversas descritas por las pacientes acometieron principalmente sistema genital y tracto gastrointestinal. Conclusión: Se evidenció que el seguimiento farmacoterapéutico contribuyó efectivamente a la adherencia al tratamiento con tamoxifeno y las intervenciones farmacéuticas realizadas contribuyeron a la prevención y reducción de los problemas asociados con la farmacoterapia.(AU)

Mixoma cardíaco: experiencia de 28 años en resección quirúrgica / Cardiac myxomas. Analysis of 78 cases

Background: The incidence rates of cardiac tumors are low. Aim: To report the clinical presentation of cardiac myxomas and long-term evolution after resection. Material and Methods: Review of a database of surgical patients undergoing surgical resection of a cardiac myxoma in a public hospital between 1990 and 2018. Results: Seventy-eight patients aged 53 ± 15 years (65% females) were included. The most frequent comorbidities were arterial hypertension (40.5%), hypothyroidism (15%) and diabetes mellitus (12%). The main presenting symptoms were dyspnea (33%), neurological deficit secondary to embolism (30%) and acute pulmonary edema (5%). The most common location was the left atrium, in 87%. During surgery, cardiopulmonary bypass and aortic cross-clamp times were 50.2 ± 19.6 and 33.4 ± 15.2 min, respectively. One patient died due to severe neurological involvement. Follow-up was completed in seventy-seven patients, with a mean echocardiographic follow-up time of 10.4 ± 7.7 years. Thirty-four patients were followed for more than 10 years. Six patients (7.7%) died during the follow-up and in six patients (7%) a recurrence was identified. Conclusions: Cardiac myxoma usually has nonspecific symptoms. Surgical excision offers excellent short and long-term results. Complications and recurrence rates are low in non-hereditary myxomas but obligates to perform echocardiographic follow-up for early diagnosis of recurrence.

High prevalence of CTX-M-1 group in ESBL-producing enterobacteriaceae infection in intensive care units in southern Chile

ABSTRACT Enterobacteria-producing extended-spectrum β-lactamases (ESBL) play an important role in healthcare infections, increasing hospitalization time, morbidity and mortality rates. Among several ESBLs that emerge from these pathogens, CTX-M-type enzymes had the most successful global spread in different epidemiological settings. Latin America presents high prevalence of CTX-M-2 in ESBL-producing enterobacterial infections with local emergence of the CTX-M-1 group. However, this high prevalence of the CTX-M-1 group has not yet been reported in Chile. The aim of this study was to identify ESBLs among enterobacteria isolated from clinical samples of critically ill patients from southern Chile. One-hundred thirty seven ESBL-producing bacteria were isolated from outpatients from all critical patient units from Hernán Henríquez Aravena Hospital. Phenotype characterization was performed by antibiogram, screening of ESBL, and determination of minimum inhibitory concentration (MIC). PCR was used for genetic confirmation of resistance. Molecular typing was performed by ERIC-PCR. ESBL-producing isolates were identified as Klebsiella pneumoniae (n = 115), Escherichia coli (n = 18), Proteus mirabilis (n = 3), and Enterobacter cloacae (n = 1), presenting multidrug resistance profiles. PCR amplification showed that the strains were positive for blaSHV (n = 111/81%), blaCTX-M-1 (n = 116/84.7%), blaTEM (n = 100/73%), blaCTX-M-2 (n = 28/20.4%), blaCTX-M-9 (0.7%), blaPER-1 (0.7%), and blaGES-10 (0.7%). The multiple production of ESBL was observed in 93% of isolates, suggesting high genetic mobility independent of the clonal relationship. The high frequency of the CTX-M-1 group and a high rate of ESBL co-production are changing the epidemiology of the ESBL profile in Chilean intensive care units. This epidemiology is a constant and increasing challenge, not only in Chile, but worldwide.

Can Triamcinolone acetonide, platelet-rich plasma, and pentosan polysulfate sodium induce oxidative stress in cultured equine chondrocytes? / Acetonido de triancinolona, plasma rico em plaquetas e pentosano polissulfato sódico podem ocasionar estresse oxidativo em cultivo de condrócitos de equinos?

ABSTRACT: Progressive deterioration and loss of articular cartilage are the final degenerative events common to osteoarthritis (OA). Reactive oxygen species (ROS) play an important role in this chondrocyte catabolic activity, leading to cell death and matrix components breakdown. Intra-articular corticosteroid injections such as triamcinolone acetonide have been used to control pain and inflammation associated with OA. New treatments for OA, platelet-rich plasma and pentosan polysulphate sodium have also been used and further investigations are necessary to determine their safety in joint cells. In this in vitro study, the use of these three substances (triamcinolone acetonide, platelet-rich plasma, and pentosan polysulphate sodium) in healthy chondrocytes did not alter the antioxidant status when compared to control groups, indicating that they could be considered safe in healthy conditions.

RESUMO: A deterioração progressiva e perda da cartilagem articular são os eventos finais da osteoartrite (OA). Espécies reativas de oxigênio (ROS) têm papel importante na atividade catabólica de condrócitos, levando a morte celular e quebra dos componentes da matriz. Injeções intra-articulares de corticosteroides, como com o acetonido de triancinolona, são usadas para controle da dor e inflamação associadas à OA. Novos tratamentos para a OA, como o plasma rico em plaquetas e o pentosano polissulfato sódico, também tem sido utilizados e necessitam de maiores investigações para determinar sua segurança para as células articulares de equinos. Neste estudo in vitro, o uso destas três substâncias (acetonido de triancinolona, pentosan polissulfato de sódio de plasma rico em plaquetas) em condrócitos saudáveis de equinos não alterou o status antioxidante quando comparado aos grupos controle, indicando que puderam ser considerados seguros em condições saudáveis.

Implicancias estructurales y fisiológicas de la célula bacteriana en los mecanismos de resistencia antibiótica / Structural and physiological implications of bacterial cell in antibiotic resistance mechanisms

RESUMEN: La alta capacidad de adaptación de las bacterias a ambientes hostiles ha permitido el desarrollo de resistencia a antibacterianos, causando problemas de impacto mundial en la salud hospitalaria y de la comunidad, limitando las opciones terapéuticas lo que afecta el control de enfermedades, elevando las tasas de morbi-mortalidad. Esta capacidad de resistencia es mediada por factores estructurales y fisiológicos de las bacterias que actúan a diferentes niveles tanto extracelular como intracelular. A niveles extracelulares se destaca la capacidad de las poblaciones bacterianas en la formación de biopelículas y la regulación de señales celulares quorum sensing, permitiendo la evasión de la acción antibiótica. A nivel de envoltura celular se destaca el funcionamiento y comportamiento de la pared celular y de la membrana celular, principalmente por medio de la regulación de la expresión de canales de entrada o porinas y/ o bombas de expulsión que impiden el acceso o inducen la salida de antibióticos; otros mecanismos integran la modificación de la actividad de drogas por medio de la hidrólisis o modificación del sitio activo del fármaco. A nivel intracelular, las bacterias pueden cambiar los procesos de óxido/reducción, modificar los sitios objetivos del antibiótico e inactivar los grupos transfer, y modificar las subunidades ribosomales afectando la acción de los antibióticos que inhiben la síntesis de proteínas. A esto se añaden las modificaciones en la expresión génica y del código genético, que regula todos los anteriores, y es capaz de generar cambios adaptativos, resistencia a fármacos y desinfectantes, entre otros. La presente revisión tiene como objetivo describir las implicancias estructurales y fisiológicas de la célula bacteriana en los mecanismos de resistencia antibiótica considerando la organización estructural y fisiológica involucrada en los principales mecanismos de resistencia a antibióticos presentes en bacterias de importancia clínica que conllevan a fallas terapéuticas con alto costo en salud humana.

SUMMARY: The high adaptability of bacteria to hostile environments has favored antibacterial resistance development, impacting hospital and community healthcare worldwide. It has also affected disease control, limited therapeutic options and raised morbiditymortality rate. This resistance ability is mediated by structural and physiological factors of bacteria acting at both extracellular and cellular levels. The ability of bacterial populations in biofilm formation and regulation of cellular signal quorum sensing at the extracellular level, allows for the evasion of antibiotic action. At a cellular level, the performance and behavior of the cell wall and cell membrane is emphasized, mainly by regulating the expression of inlet channels or porins and/or expulsion pumps preventing access to, or inducing the outflow of antibiotics. Other mechanisms integrate modification of drug activity by hydrolysis or modification of the active site of the drug. Further into intracellular level, bacteria can change the oxidation/reduction processes; modify the target sites of the antibiotic and inactivate transfer groups. Bacteria can also modify the ribosomal subunits affecting the antibiotics which inhibit protein synthesis, and cause modifications of gene expression and genetic code that regulate the above mechanism. These may also generate adaptive changes and resistance to drugs and disinfectants. The aim of the present review is to describe the structural and physiological implications of bacterial cell in the mechanisms of antibiotic resistance. The study also considered the structural and physiological organization involved in the main mechanisms of antibiotic resistance in bacteria relevant to clinical healthcare.