RESUMO

DNA mismatch repair protein deficiency (MMRd) in endometrial carcinoma is associated with the risk of Lynch syndrome and response to immune checkpoint inhibitors. It is also related to microsatellite instability and corresponds to a molecular subtype of endometrial tumor with an unclear prognosis. Here, we evaluated the clinicopathological characteristics and prognosis of 312 consecutive endometrial carcinoma cases submitted to complete surgical staging at a single institution. We compared MMRd and mismatch repair protein-proficient (MMRp) tumors and examined the effects of the MMR protein loss type (MLH1/PMS2 vs. MSH2/MSH6) and influence of L1CAM and p53 expression. The median follow-up period was 54.5 (range, 0-120.5) months. No difference was observed between MMRd [n = 166 (37.2%)] and MMRp [n = 196 (62.8%)] cases in terms of age, body mass index, FIGO stage, tumor grade, tumor size, depth of myometrial infiltration, or lymph node metastasis. More MMRd than MMRp tumors had endometrioid histology (87.9% vs. 75.5%) and despite MMRd had more lymphovascular space invasion (LVSI; 27.2% vs. 16.9%), they presented fewer recurrences and no difference in lymph node metastasis and disease-related death. Relative to those with MLH1/MSH6 loss, tumors with MSH2/MSH6 loss were diagnosed at earlier FIGO stages, were smaller, and had less ≥50% myometrial invasion, LVSI and lymph node metastasis. Outcomes, however, did not differ between these groups. L1CAM positivity and mutation-type p53 expression were more common in MMRp than in MMRd tumors and did not differ between the MLH1/PMS2 and MSH2/MSH6 loss groups. In the entire cohort, L1CAM and mutation p53 expression were associated with worse prognosis, but only non-endometrioid histology, FIGO stage III/IV, and deep myometrial infiltration were significant predictors. In the subgroup of endometrioid carcinomas, only FIGO stage III/IV was associated with poor outcomes. The risk of lymph node metastasis was associated with tumor size, non-endometrioid histology, and multifocal LVSI. For MMRd tumors, only tumor size and myometrial invasion depth were predictive of lymph node involvement. In our cohort, MMRd tumors were associated with greater recurrence-free, but not overall, survival. The precise identification of MMRd status, present in a substantial proportion of endometrial cancer cases, is a challenge to be overcome for proper patient management. MMRd status serves as a marker for Lynch syndrome, and a significant number of these tumors are high risk and candidate to immunotherapy.

RESUMO

Background: Endometrial cancer is of increasing concern in several countries, including Brazil, in part because of an ageing population, declines in fertility, and the increasing prevalence of obesity. Although endometrial tumors had lagged behind other cancer types in terms of treatment improvements, molecular characterization of these tumors is paving the way for novel therapies and an expansion of the therapeutic arsenal. We aimed to help medical oncologists who manage patients with recurrent or metastatic endometrial cancer in the Brazilian healthcare setting. Methods: The panel, composed of 20 medical oncologists, convened in November 2021 to address 50 multiple-choice questions on molecular testing and treatment choices. We classified the level of agreement among panelists as (1) consensus (≥75% choosing the same answer), (2) majority vote (50% to <75%), or (3) less than majority vote (<50%). Results: Consensus was present for 25 of the 50 questions, whereas majority vote was present for an additional 23 questions. Key recommendations include molecular testing for every patient with recurrent/metastatic endometrial cancer; choice of first-line treatment according to microsatellite instability and HER2, with the addition of programmed death ligand 1 (PD-L1) and hormone receptors (HRs) for second-line therapy; carboplatin and paclitaxel as the preferred option in first-line treatment of HER2-negative disease, with the addition of trastuzumab in HER2-positive disease; pembrolizumab plus lenvatinib as a key option in second line, regardless of HER2, PD-L1 or HRs; and various recommendations regarding treatment choice for patients with distinct comorbidities. Conclusion: Despite the existing gaps in the current literature, the vast majority of issues addressed by the panel provided a level of agreement sufficient to inform clinical practice in Brazil and in other countries with similar healthcare environments.

RESUMO

Happiness is related to longevity and better health; nevertheless, there is a lack of knowledge about the construct, understood as subjective well-being (SWB), of older adults undergoing hemodialysis. This cross-sectional study investigated the extent to which hemodialysis treatment affects the SWB of older adults, compared to non-dialysis older adults. Regarding this, a total of 126 participants have interviewed: all the older adults in the hemodialysis service, 42 patients, from a city in Brazil, and 84 older adults from the Community, age- and gender-matched, predominantly men (64.3%), aged between 60 and 81 years. Participants respond to pattern questionnaires about SWB (life satisfaction, positive affect, negative affect), depressive symptoms, sociodemographic characteristics, and physical health status. Analysis of variance presented in hemodialysis had no effect on SWB and depressive symptoms. Furthermore, participants in the hemodialysis had fewer years of schooling, and those in the community presented more diseases. The high number of illnesses and low educational level demonstrate effects on SWB, as well the length of hemodialysis is negatively associated with SWB. Therefore, hemodialysis by itself does not make older adults unhappier and depressive, but some variables depending on the socioeconomical status and length of treatment are associated with depression and worst SWB.

RESUMO

Neutrophil extracellular traps (NETs) represent an innate organism defense mechanism characterized by neutrophil release of intracellular material to capture any aggressor agent. Elevated NETs release is associated with increased inflammatory response and related diseases, such as obesity. Chronic physical training is one of the main strategies to treat and prevent obesity. The relationship between physical training and NETs is still under study. The present review, followed by a bioinformatics analysis, demonstrates the meaningful connection between physical exercise, obesity, and NETs. The bioinformatics indicated TNF-α as a leading gene after the ontological analysis followed by positive-interleukin-6 regulation, chemokines, and inflammatory response regulation. The main results pointed to a relevant regulatory effect of physical training on NETs release, indicating physical exercise as a possible therapeutic target on modulating NETs and inflammation.

Assuntos

Exercício Físico/genética , Inflamação/genética , Obesidade/genética , Fator de Necrose Tumoral alfa/genética , Biologia Computacional , Armadilhas Extracelulares/genética , Humanos , Inflamação/fisiopatologia , Inflamação/terapia , Neutrófilos/metabolismo , Obesidade/fisiopatologia , Obesidade/terapia

RESUMO

The present study aimed to evaluate the effects of resveratrol, a nutraceutical polyphenol, and Lactococcus lactis (bacteria probiotic), on metabolic parameters and hepatic proinflammatory markers expression. C57BL/6 mice were divided into 4 groups: Standard (ST), Lactococcus lactis (LL), Resveratrol (RSV), and Lactococcus lactis plus resveratrol (LL + RSV). Lactococcus lactis and resveratrol were administered by orogastric gavage. Blood parameters were assessed (total cholesterol, triglycerides, ALT and AST). IL-6 mRNA expression was evaluated by Real-time PCR and TNF-α protein expression was assessed by immunohistochemistry. The main findings showed that resveratrol and Lactococcus lactis association decreased body weight, aspartate aminotransferase and total cholesterol levels. LL and LL + RSV decreased triglycerides levels and IL-6 and TNF-α expression. These results open a perspective of using resveratrol and Lactococcus lactis to improve metabolic parameters and Lactococcus lactis in preventing inflammation and the hepatic diseases development.

Assuntos

Regulação da Expressão Gênica/efeitos dos fármacos , Lactococcus lactis/metabolismo , Fígado/efeitos dos fármacos , Probióticos/farmacologia , Resveratrol/farmacologia , Administração Oral , Alanina Transaminase/sangue , Animais , Aspartato Aminotransferases/sangue , Peso Corporal/efeitos dos fármacos , Peso Corporal/fisiologia , Colesterol/sangue , Biologia Computacional , Feminino , Regulação da Expressão Gênica/genética , Ontologia Genética , Imuno-Histoquímica , Inflamação/tratamento farmacológico , Inflamação/metabolismo , Inflamação/microbiologia , Interleucina-6/genética , Interleucina-6/metabolismo , Fígado/metabolismo , Fígado/patologia , Camundongos , Camundongos Endogâmicos C57BL , Resveratrol/administração & dosagem , Triglicerídeos/sangue , Fator de Necrose Tumoral alfa/genética , Fator de Necrose Tumoral alfa/metabolismo

RESUMO

BACKGROUND: Solanum lycocarpum is a medicinal plant used in Brazil with hypoglycemic activity by its fruits use. However, the fruits production is restricted in some periods of the year, differently of leaves. OBJECTIVE: To evaluate the effects of hydroalcoholic extracts of S. lycocarpum leaves in alloxan-induced diabetic mice. METHODS: Hydroalcoholic extract of S. lycocarpum was characterized by phytochemical and GCMS analysis. The Antidiabetic activity was assessed following treatment for 22 days with S. lycocarpum extract at 125, 250, and 500 mg/kg. Bodyweight, water, and food intake, glycemia, biochemical parameters, anatomy-histopathology of the pancreas, liver and kidney, and expression of target genes were analyzed. In addition, oral acute toxicity was evaluated. RESULTS: Animals treated showed a significant reduction (p < 0.05) in glycemia following a dose of 125 mg/kg. Food intake remained similar for all groups. Decreased polydipsia symptoms were observed after treatment with 250 (p < 0.001) and 500 mg/kg (p < 0.01) compared with diabetic control, although normal rates were observed when 125 mg/kg was administered. A protective effect was also observed in the pancreas, liver, and kidneys, through the regeneration of the islets. Hypoglycemic activity can be attributed to myo-inositol, which stimulates insulin secretion, associated with α-tocopherol, which prevents damage from oxidative stress and apoptosis of ß-pancreatic cells by an increased Catalase (CAT) and Glutathione peroxidase 4 (GPX4) mRNA expression. The toxicological test demonstrated safe oral use of the extract under the present conditions. CONCLUSION: Hydroalcoholic extract of S. lycocarpum promotes the regulation of diabetes in the case of moderate glycemic levels, by decreasing glycemia and exerting protective effects on the islets.

Assuntos

Complicações do Diabetes/tratamento farmacológico , Diabetes Mellitus Experimental/tratamento farmacológico , Hipoglicemiantes/farmacologia , Extratos Vegetais/farmacologia , Solanum/química , Alanina Transaminase/metabolismo , Fosfatase Alcalina/metabolismo , Aloxano/administração & dosagem , Animais , Aspartato Aminotransferases/metabolismo , Glicemia/metabolismo , Peso Corporal/efeitos dos fármacos , Catalase/metabolismo , Complicações do Diabetes/metabolismo , Complicações do Diabetes/patologia , Diabetes Mellitus Experimental/induzido quimicamente , Diabetes Mellitus Experimental/metabolismo , Diabetes Mellitus Experimental/patologia , Ingestão de Líquidos/efeitos dos fármacos , Ingestão de Alimentos/efeitos dos fármacos , Hipoglicemiantes/química , Inositol/farmacologia , Rim/efeitos dos fármacos , Rim/metabolismo , Rim/patologia , Fígado/efeitos dos fármacos , Fígado/metabolismo , Fígado/patologia , Masculino , Camundongos , Pâncreas/efeitos dos fármacos , Pâncreas/metabolismo , Pâncreas/patologia , Fosfolipídeo Hidroperóxido Glutationa Peroxidase/metabolismo , Extratos Vegetais/química , Folhas de Planta/química , alfa-Tocoferol/farmacologia

RESUMO

PURPOSE: Although chemoradiation therapy (CRT) with cisplatin remains the standard treatment of patients with locally advanced cervical cancer (LACC), 40% of patients present with disease recurrence. Additional treatment strategies are required to improve outcomes. We conducted a trial to evaluate the efficacy and safety of neoadjuvant chemotherapy (NAC) with cisplatin and gemcitabine followed by CRT. METHODS: In this phase II trial, patients with LACC (International Federation of Gynecology and Obstetrics stage IIB to IVA or with positive lymph nodes) were randomly assigned to three cycles of NAC with cisplatin and gemcitabine followed by standard CRT with weekly cisplatin plus pelvic radiotherapy or to standard CRT alone. The primary end point was 3-year progression-free survival (PFS). Secondary end points were response rate, 3-year locoregional control, 3-year overall survival (OS), safety, and quality of life. RESULTS: From 107 patients enrolled in the trial, 55 were randomly assigned to the NAC arm and 52 to the CRT-alone arm. The majority of patients had squamous cell carcinoma (87.8%). After a median follow-up of 31.7 months, NAC was associated with an inferior PFS, with 3-year PFS rates of 40.9% v 60.4% in the CRT arm (hazard ratio, 1.84; 95% CI, 1.04 to 3.26; P = .033). NAC also was associated with a lower OS (3-year OS rate, 60.7% v 86.8%; hazard ratio, 2.79; 95% CI, 1.29 to 6.01; P = .006). After treatment completion, complete response rates were 56.3% in the NAC arm and 80.3% in the CRT arm (P = .008). Toxicities were similar in both arms, with the exception of hypomagnesemia and neuropathy being more common with NAC. CONCLUSION: This study shows that the addition of NAC consisting of cisplatin and gemcitabine to standard CRT is not superior and is possibly inferior to CRT alone for the treatment of LACC.

Assuntos

Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Cisplatino/uso terapêutico , Neoplasias do Colo do Útero/tratamento farmacológico , Neoplasias do Colo do Útero/radioterapia , Adulto , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Quimiorradioterapia , Quimioterapia Adjuvante , Cisplatino/administração & dosagem , Cisplatino/efeitos adversos , Desoxicitidina/administração & dosagem , Desoxicitidina/efeitos adversos , Desoxicitidina/análogos & derivados , Feminino , Humanos , Pessoa de Meia-Idade , Terapia Neoadjuvante , Cooperação do Paciente , Intervalo Livre de Progressão , Adulto Jovem , Gencitabina

RESUMO

BACKGROUND: Risk stratification of endometrial carcinomas is primarily based on surgical staging that requires extensive retroperitoneal lymph node dissection. One of the most powerful predictor of lymph node involvement is the lymph vascular space invasion (LVSI). The objective of this study was to determine the potential of L1 Cell Adhesion Molecule (L1CAM) to predict LVSI and its association with other risk factors in endometrioid endometrial carcinomas. MATERIALS AND METHODS: We studied 47 consecutive patients aged 37-88 (61.34±10.52). Twenty-three patients (48.9%) were submitted to complete surgical staging. Nine patients (19.1%) underwent surgical staging without para-aortic dissection. Seven (14.9%) were submitted to hysterectomy with no lymph node dissection. Eight patients (17.0%) only had the biopsy material for analysis. The 32 patients submitted to lymphadenectomy were staged according to the FIGO system and classified among the risk categories of the ESMO-ESGO-ESTRO guidelines. The following histological characteristics were analyzed: tumor size (mm), depth of myometrial infiltration, presence of microcystic, elongated, and fragmented (MELF) pattern of myoinvasion, and lymph vascular space invasion (LVSI). Immunohistochemical analyses of mismatch repair (MMR) proteins MLH1, MSH2, MSH6, and PMS2, p53, and L1CAM were performed in formalin-fixed paraffin embedded whole tumor tissue sections. RESULTS: LVSI was identified in 26/41 (63,4%) of the cases. L1CAM was positive in 8/47 (17%) cases, all of them positive for LVSI and within the high-risk category of ESMO-ESGO-ESTRO. L1CAM-positive cases were associated with high histological grade and p53 aberrant immunohistochemical profile. Besides, it showed a trend to larger tumors, greater depth of myometrial infiltration, and with a higher frequency of the MELF pattern of myoinvasion. LVSI was also associated with FIGO stage, tumor size, depth of myometrial infiltration, and tumor grade. CONCLUSIONS: L1CAM is highly associated with LVSI and could be used as a pre-operative predictor of lymph node involvement in endometrioid endometrial carcinomas.

Assuntos

Carcinoma Endometrioide/metabolismo , Neoplasias do Endométrio/metabolismo , Metástase Linfática/diagnóstico , Invasividade Neoplásica/diagnóstico , Molécula L1 de Adesão de Célula Nervosa/metabolismo , Adulto , Idoso , Idoso de 80 Anos ou mais , Biomarcadores Tumorais/metabolismo , Carcinoma Endometrioide/patologia , Carcinoma Endometrioide/cirurgia , Estudos de Coortes , Neoplasias do Endométrio/patologia , Neoplasias do Endométrio/cirurgia , Feminino , Humanos , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Dados Preliminares , Período Pré-Operatório

RESUMO

PURPOSE: The best adjuvant treatment in high-risk endometrial cancer remains unclear. Although adjuvant chemotherapy seems to improve overall survival (OS) in locally advanced disease, the role of adding radiotherapy is not certain. We evaluated the outcomes of patients with high-risk endometrial cancer treated with adjuvant chemotherapy followed by radiotherapy. PATIENTS AND METHODS: We performed a retrospective analysis of patients with high-risk endometrial cancer (endometrioid histology stages III to IVA or carcinosarcoma, clear cell, or serous histology stages I to IVA) treated with adjuvant carboplatin and paclitaxel, followed by radiotherapy, from 2010 to 2017 at a Brazilian cancer center. The Kaplan-Meier method was used for survival analysis, and prognostic factors were analyzed using the Cox proportional hazards model. RESULTS: One hundred forty-six consecutive patients were evaluated. The OS rates were 86.2% at 3 years and 75.4% at 5 years. OS was significantly affected by pelvic lymphadenectomy ( P = .001) and positive peritoneal cytology ( P < .001). Three- and 5-year disease-free survival (DFS) rates were 78.3% and 69.5%, respectively. The initial site of recurrence was limited to the pelvis in 4.1% of patients, within the abdomen in 1.3%, and extra-abdominal in 11.6%. Patients with grade 1 or 2 endometrioid carcinoma had better prognosis than patients with endometrioid carcinoma grade 3 or nonendometrioid histology (3-year DFS, 93.67% v 68.5%, respectively; P = .0017). CONCLUSION: Adjuvant carboplatin and paclitaxel, followed by radiotherapy, is effective in high-risk endometrial cancer and associated with low rates of pelvic recurrence, which might be explained by the addition of radiotherapy. The high-risk group is heterogeneous, and the benefit of adjuvant treatment in patients with grade 1 or 2 endometrioid carcinoma is less clear.

Assuntos

Antineoplásicos Fitogênicos/uso terapêutico , Carboplatina/uso terapêutico , Neoplasias do Endométrio/tratamento farmacológico , Neoplasias do Endométrio/radioterapia , Paclitaxel/uso terapêutico , Idoso , Antineoplásicos Fitogênicos/farmacologia , Carboplatina/farmacologia , Neoplasias do Endométrio/mortalidade , Feminino , Humanos , Pessoa de Meia-Idade , Paclitaxel/farmacologia , Estudos Retrospectivos , Taxa de Sobrevida

RESUMO

Introducción: En pediatría las enfermedades infecciosas constituyen la causa más frecuente de consulta a nivel de atención primaria en salud. La población del presente trabajo de investigación es predominantemente de la etnia Warao y nuestra línea de investigación pretende realizar diagnóstico clínico oportuno tanto de la gravedad del estado nutricional como de las enfermedades infecciosas, respetando la identidad, cultura y autonomía de dicha etnia. Objetivo: Identificar las enfermedades infecciosas más frecuentes por diagnóstico clínico en pacientes desnutridos con edades comprendidas entre 6 meses a 10 años de edad, habitantes de la Parroquia Curiapo, Municipio Antonio Díaz, Edo. Delta Amacuro en el período mayo-julio de 2016. Métodos: La recolección de datos se basó en la entrevista médico-paciente y en la utilización de equipos médicos como estetoscopio, otorrinolaringoscopio, balanza, cinta métrica, gráficas nutricionales de la Organización Mundial de la Salud y las del Estudio Transversal de Caracas. Resultados: De 608 pacientes en estudio, 296 (48,7 %) se encuentran en un estado de malnutrición por déficit, siendo la desnutrición subclínica la predominante con un total de 107 casos. Por otro lado de esos pacientes con malnutrición por déficit, la diarrea y el catarro común conforman las enfermedades infecciosas más frecuentes. Conclusión: El 50 % de la población en estudio presenta algún grado de desnutrición, y la enfermedad infecciosa más frecuente es la diarrea la cual deteriora el estado nutricional del paciente; generándose un círculo pobreza-enfermedad difícil de romper.

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Introduction: Pediatric infectious diseases are the most frequent cause of consultation at the level of primary health care. The population of this research belongs to ethnic warao, and our research aims to make timely clinical diagnosis of the severity of the nutritional status and the infectious diseases, respecting the identity, culture and autonomy of this ethnic group. Objective: Our main objective is to identify the most common infectious diseases by clinical diagnosis in undernourished patients between 6 months and 10 years old inhabitants of the Curiapo Parish, Municipality Antonio Diaz, Edo. Delta Amacuro in the period May-July 2016. Methods: Data collection was based in Medical-patient interview, also using medical equipment such as stethoscope, tape measure, othorrinolaringoscope, scales, Nutritional charts of the World Health Organization and the Transversal Study of Caracas for a complete physical examination. Results: In our research we found out that, of 608 patients studied, 296 (48,7 %) are in undernourished deficit level, being subclinical malnutrition the most frequent with 107 cases. On the otherside, those patients with undernourished deficit level, Diarrhea and common cold make up the most frequent infectious diseases in our studied population. Conclusions: We conclude that in the population, about 50 %, have some kind of malnutrition and the most common infectious diseases is diarrhea which decrease the nutritional status of the patients, generating a poverty-disease circle, very difficult to break out.

RESUMO

Background: Leptospirosis is a cosmopolitan zoonosis caused by pathogenic spirochetes of the genus Leptospira spp. and it is considered one of the main causes of reproductive problems in cattle. Therefore, the aim of this study was to determine the occurrence of anti-Leptospira antibodies and identify the prevalent serovars and risk factors associated with infection in cattle herds, in the microregion of Floriano, Piaui State, Brazil.Materials, Methods & Results: A total of 414 bovine sera samples were collected (390 females aged over 24 months and 24 bulls) from 22 properties (farms) in the municipalities that compose the study area. The samples were analyzed using the Microscopic Agglutination Test (MAT) to detect anti-Leptospira antibodies from 23 pathogenic serovars. An epidemiological questionnaire was applied in each farm to evaluate the risk factors, using a univariate analysis of the variables of interest, by Pearsons Chi-square test (2) or Fishers exact test, when it was necessary. Then, each independent variable was crossed with the dependent variable and those that presented statistical significance 0.20 were selected for multivariate analysis, using logistic regression, adopting a significance level of 5%. This research identified 143 positive animals (MAT> 1: 100) in the 22 evaluated farms; all of them had at least one positive animal, resulting in a

RESUMO

Background: Leptospirosis is a cosmopolitan zoonosis caused by pathogenic spirochetes of the genus Leptospira spp. and it is considered one of the main causes of reproductive problems in cattle. Therefore, the aim of this study was to determine the occurrence of anti-Leptospira antibodies and identify the prevalent serovars and risk factors associated with infection in cattle herds, in the microregion of Floriano, Piaui State, Brazil.Materials, Methods & Results: A total of 414 bovine sera samples were collected (390 females aged over 24 months and 24 bulls) from 22 properties (farms) in the municipalities that compose the study area. The samples were analyzed using the Microscopic Agglutination Test (MAT) to detect anti-Leptospira antibodies from 23 pathogenic serovars. An epidemiological questionnaire was applied in each farm to evaluate the risk factors, using a univariate analysis of the variables of interest, by Pearsons Chi-square test (2) or Fishers exact test, when it was necessary. Then, each independent variable was crossed with the dependent variable and those that presented statistical significance 0.20 were selected for multivariate analysis, using logistic regression, adopting a significance level of 5%. This research identified 143 positive animals (MAT> 1: 100) in the 22 evaluated farms; all of them had at least one positive animal, resulting in a

RESUMO

Background: Leptospirosis is a cosmopolitan zoonosis caused by pathogenic spirochetes of the genus Leptospira spp. and it is considered one of the main causes of reproductive problems in cattle. Therefore, the aim of this study was to determine the occurrence of anti-Leptospira antibodies and identify the prevalent serovars and risk factors associated with infection in cattle herds, in the microregion of Floriano, Piaui State, Brazil.Materials, Methods & Results: A total of 414 bovine sera samples were collected (390 females aged over 24 months and 24 bulls) from 22 properties (farms) in the municipalities that compose the study area. The samples were analyzed using the Microscopic Agglutination Test (MAT) to detect anti-Leptospira antibodies from 23 pathogenic serovars. An epidemiological questionnaire was applied in each farm to evaluate the risk factors, using a univariate analysis of the variables of interest, by Pearsons Chi-square test (2) or Fishers exact test, when it was necessary. Then, each independent variable was crossed with the dependent variable and those that presented statistical significance 0.20 were selected for multivariate analysis, using logistic regression, adopting a significance level of 5%. This research identified 143 positive animals (MAT> 1: 100) in the 22 evaluated farms; all of them had at least one positive animal, resulting in a

RESUMO

Background: Leptospirosis is a cosmopolitan zoonosis caused by pathogenic spirochetes of the genus Leptospira spp. and it is considered one of the main causes of reproductive problems in cattle. Therefore, the aim of this study was to determine the occurrence of anti-Leptospira antibodies and identify the prevalent serovars and risk factors associated with infection in cattle herds, in the microregion of Floriano, Piaui State, Brazil.Materials, Methods & Results: A total of 414 bovine sera samples were collected (390 females aged over 24 months and 24 bulls) from 22 properties (farms) in the municipalities that compose the study area. The samples were analyzed using the Microscopic Agglutination Test (MAT) to detect anti-Leptospira antibodies from 23 pathogenic serovars. An epidemiological questionnaire was applied in each farm to evaluate the risk factors, using a univariate analysis of the variables of interest, by Pearsons Chi-square test (2) or Fishers exact test, when it was necessary. Then, each independent variable was crossed with the dependent variable and those that presented statistical significance 0.20 were selected for multivariate analysis, using logistic regression, adopting a significance level of 5%. This research identified 143 positive animals (MAT> 1: 100) in the 22 evaluated farms; all of them had at least one positive animal, resulting in a

RESUMO

Background: Leptospirosis is a cosmopolitan zoonosis caused by pathogenic spirochetes of the genus Leptospira spp. and it is considered one of the main causes of reproductive problems in cattle. Therefore, the aim of this study was to determine the occurrence of anti-Leptospira antibodies and identify the prevalent serovars and risk factors associated with infection in cattle herds, in the microregion of Floriano, Piaui State, Brazil.Materials, Methods & Results: A total of 414 bovine sera samples were collected (390 females aged over 24 months and 24 bulls) from 22 properties (farms) in the municipalities that compose the study area. The samples were analyzed using the Microscopic Agglutination Test (MAT) to detect anti-Leptospira antibodies from 23 pathogenic serovars. An epidemiological questionnaire was applied in each farm to evaluate the risk factors, using a univariate analysis of the variables of interest, by Pearsons Chi-square test (2) or Fishers exact test, when it was necessary. Then, each independent variable was crossed with the dependent variable and those that presented statistical significance 0.20 were selected for multivariate analysis, using logistic regression, adopting a significance level of 5%. This research identified 143 positive animals (MAT> 1: 100) in the 22 evaluated farms; all of them had at least one positive animal, resulting in a

RESUMO

Background: Leptospirosis is a cosmopolitan zoonosis caused by pathogenic spirochetes of the genus Leptospira spp. and it is considered one of the main causes of reproductive problems in cattle. Therefore, the aim of this study was to determine the occurrence of anti-Leptospira antibodies and identify the prevalent serovars and risk factors associated with infection in cattle herds, in the microregion of Floriano, Piaui State, Brazil.Materials, Methods & Results: A total of 414 bovine sera samples were collected (390 females aged over 24 months and 24 bulls) from 22 properties (farms) in the municipalities that compose the study area. The samples were analyzed using the Microscopic Agglutination Test (MAT) to detect anti-Leptospira antibodies from 23 pathogenic serovars. An epidemiological questionnaire was applied in each farm to evaluate the risk factors, using a univariate analysis of the variables of interest, by Pearsons Chi-square test (2) or Fishers exact test, when it was necessary. Then, each independent variable was crossed with the dependent variable and those that presented statistical significance 0.20 were selected for multivariate analysis, using logistic regression, adopting a significance level of 5%. This research identified 143 positive animals (MAT> 1: 100) in the 22 evaluated farms; all of them had at least one positive animal, resulting in a

RESUMO

The objective of this study was to report our experience with 38 consecutive patients with metastatic melanoma treated with high-dose (HD) bolus interleukin (IL)-2 after disease progression on or after biochemotherapy as the only earlier treatment for metastatic disease. We conducted a retrospective review of all patients with metastatic melanoma treated with HD IL-2 at the Oncology Center of Hospital Sirio-Libanes between October 2000 and December 2009. The treatment consisted of IL-2, of 600,000 U/kg every 8 h for up to 14 doses, followed by 1-week rest and readmission for the second cycle. Responders received up to four additional cycles. Median follow-up was 9 months. The overall response rate was 23.6%, and we found no correlation between earlier response to biochemotherapy and response to HD IL-2. The median survival was 9.5 months for all patients and 36.1 months for the responders. The most frequent grade 3 or 4 adverse events were hypotension, diarrhea, and respiratory distress, and one patient died from septic shock. We concluded that HD IL-2 has clinically meaningful antitumor activity in patients with metastatic melanoma whose disease has progressed after biochemotherapy. This is a treatment alternative in patients with no central nervous system involvement and who are fit enough to tolerate it, regardless of the initial response to biochemotherapy.

Assuntos

Antineoplásicos/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Interleucina-2/administração & dosagem , Melanoma/tratamento farmacológico , Adulto , Idoso , Antineoplásicos/efeitos adversos , Brasil , Progressão da Doença , Feminino , Humanos , Interleucina-2/efeitos adversos , Estimativa de Kaplan-Meier , Masculino , Melanoma/diagnóstico , Melanoma/mortalidade , Melanoma/secundário , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Tomografia por Emissão de Pósitrons , Estudos Retrospectivos , Fatores de Tempo , Tomografia Computadorizada por Raios X , Falha de Tratamento , Adulto Jovem

RESUMO

A three-phase, liquid-phase microextraction using a hollow fibre (HF-LPME) combined with high performance liquid chromatography-fluorescence detection (HPLC-FL) was developed for the analysis of fluoxetine (FLX) and its active metabolite, norfluoxetine (NFLX), in human plasma. An HF-LPME system using a disposable 7-cm polypropylene porous hollow fibre, 5 mL of alkaline plasma solution (donor phase), n-hexyl ether (extraction solvent) and 20 mM hydrochloric acid (acceptor phase) was used in the extraction. The method was validated after optimisation of several parameters that influence LPME efficiency. A reverse-phase LiChrospher 60 RP-Select B column (125 mm x 4 mm, 5 microm particle size) was used with 0.005 M sodium acetate buffer (pH 4.5) and acetonitrile at a 50:50 (v/v) as the mobile phase at a flow rate of 0.6 mL min(-1). In these conditions satisfactory chromatographic resolution and efficiency for the analytes were obtained. Fluorescence detection at 230 nm excitation wavelength and 290 nm emission wavelength was performed. Linearity over a range of 5-500 ng mL(-1), with determination coefficients (R(2)) of 0.9999 and 0.9962 for FLX and NFLX, respectively, was established. Venlafaxine was used as the internal standard for both analytes. Extraction recoveries from plasma samples were 70.9% for FLX and 59.7% for NFLX. The intra-day coefficients of variation (CVs) were below 5.4%, and inter-day CVs were below 13.0%, for both analytes at concentrations of 20, 80 and 160 ng mL(-1). HF-LPME extraction followed by HPLC-FL detection for FLX and NFLX analyses demonstrated excellent sample clean-up and selectivity. This method was simple, cheap, and easy to perform, yielding substantial analytes enrichment. The method was applied to the analysis of samples from 12 patients under fluoxetine treatment and proved suitable for routine therapeutic drug monitoring for this antidepressant.

Assuntos

Antidepressivos de Segunda Geração/sangue , Cromatografia Líquida de Alta Pressão/métodos , Fluoxetina/análogos & derivados , Fluoxetina/sangue , Monitoramento de Medicamentos/métodos , Fluorescência , Humanos , Solventes/química

RESUMO

Colon cancer represents the second leading cause of cancer-related deaths. For patients who have undergone curative surgery, adjuvant therapy can reduce the risk of recurrence and death from relapsed or metastatic disease. Postoperative chemotherapy with a 5-fluorouracil-based regimen combined with oxaliplatin is the current standard of care for stage III patients. However, there is still controversy in stage II disease about the real impact of adjuvant monotherapy or combined therapy on survival. Better identification of a subgroup of patients with a higher risk of recurrence can select patients who might benefit from adjuvant therapy. For the elderly population, there is a well-established role for postoperative therapy, although the most appropriate regimen remains to be defined. Targeted agents for combined adjuvant therapy in stage II and III colon cancer is a promising area, but to date, there is no evidence supporting its use in this setting. Results from large prospective trials with targeted therapy have been disappointing and new drugs and strategies are needed to define the role of these types of agents in the adjuvant scenario of colon cancer.

RESUMO

Cellular detoxification and excretion enzymes are important to the maintenance of cellular homeostasis. In this work mRNA transcription, protein expression and enzymatic activity of Glutathione S-transferases (GSTs), enzymes involved in the excretion of endo and xenobiotic compounds were analyzed. These parameters are elements believed to protect cells against chemical toxicity and oxidative stress in different tissues (salivary gland, ovary and synganglion) from partially engorged females and engorged females of Boophilus microplus. The results presented showed elevated GST activity in partially engorged females. The enzymatic activity decreased during the preoviposition period in engorged females. GST mRNA transcription was detected in salivary glands and synganglion from partially engorged and engorged females, but not in ovary. The results of this work help to elucidate the role of GST in tick development and assist in the understanding of the importance of GST in tick females during the preparation for oviposition.

Assuntos

Glutationa Transferase/metabolismo , Carrapatos/enzimologia , Animais , Feminino , Glutationa Transferase/biossíntese