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Methadone treatment reduces the use of heroin and withdrawal symptoms; however, methadone is an expensive medication with a narrow safety margin. We compared the retention rates, persistence of heroin use, and quality of life of a group of patients undergoing conventional Methadone Maintenance Treatment (MMT) with a group for whom the CYP2B6 516G>T polymorphism was used in addition to the MMT to calculate the required methadone dose. Over 12 weeks, the retention rate, heroin usage, and quality of life of patients under conventional treatment (n = 34) were compared with those of patients for whom we used genetic markers to calculate methadone dosage (n = 38). At the end of the study, 26.4% of patients abandoned the program, and neither demographic nor clinical variables were associated with treatment adherence. Of the remaining patients, 16% of the control group and 8% of patients in the pharmacogenetic group reported heroin use, while both groups showed a 64% reduction in the use of cocaine/crack (no significant differences between the groups were found). Starting in the second week, the methadone dosage was lower among the patients for whom methadone was prescribed based on genotype. Although there were six individuals in the control group and three in the pharmacogenetic group with QTc intervals > 450 ms (a threshold that is considered dangerous), we did not find a relationship between the QTc interval and methadone dosage. There were no differences in the perception of quality of life between the two groups. The results of this pilot study suggest that concerning methadone therapy, the CYP2B6 genotype contributes to reduced effective doses and treatment costs.

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Abstract Pyroligneous acid (PA) was obtained by condensation of the vapors produced in the thermal decomposition of culms residues from Guadua angustifolia Kunth (G. angustifolia) cultivated in Colombia, with and without previous preservation treatment with borax salts. Chemical characterization by GC-MS showed that PA extracts has high content of phenolic compounds. Mequinol, isocreosol, 4-ethylphenol, 4-ethyl-2-methoxyphenol, 3,5-dimethoxy-4-hydroxytoluene and 2,6-dimethoxyphenol were the most abundant substances, identified. The total phenolic content (TPC) and DPPH free radical scavenging activity, were investigated. TPC showed a concentration of 1.959 mg GA g-1±0.010 and 3.844 mg GA g-1±0.027 to PAC and PAS samples. These samples also exhibited high DPPH activity of 70.975%±0.921 and, 16.667%±0.298, respectively. The chemical composition, TPC and DPPH results indicate that the PA extracts obtained from G. angustifolia may be used as a raw material in the food industry as natural preservative, in medicine as alternative to antibiotics and in agriculture as insect repellent and foliar fertilizer.

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By 2050, the world population will reach 9.2 billion, increasing the food demand by twice. Lowering loss due to pests is still challenging, where pesticides play an important role, but its indiscriminate use causes inadequate residual amounts to be present in foods. This study aims to monitor the organochlorine and organophosphorus pesticide residuality in Allium fistulosum cultivated in Risaralda, Colombia using gaschromatography - mass spectrometry (GC-MS). This method presented a highly sensitive (LOD: 0.11-7.15 µg kg-¹), acceptable precision (RSD: 0.83-1.35%) and recoveries percentages between 46.32% - 118.67%. A greater presence of organochlorine pesticides banned or severely restricted by the Rotterdam agreement, such as 4,4'-DDT, was reported in samples of Allium fistulosum, with concentrations up to 221.22 μg kg-¹, while endrin with a concentration of 469.23 μg kg-¹ and its degradation products which exceed the maximum residue limite (MRL) for plant samples, reported by the Codex Alimentarius. According to this MRL, it was found that 73.1% of the samples have residual exceeding the allowed limit of organochlorine pesticides by more than forty times, posing a risk to human health and the ecosystem. Continuous monitoring and strict governmental control are required to reduce the exposure of humans and other living beings.

Em 2050 a população mundial chegará a 9.2 bilhões, aumentando a demanda por alimentos em duas vezes. Diminuir as perdas devido a pragas ainda é um desafio, onde os pesticidas desempenham um papel importante, mas seu uso indiscriminado faz com que quantidades residuais inadequadas estejam presentes nos alimentos. Este estudo tem como objetivo monitorar a concentração residual de pesticidas organoclorados e organofosforados em cebola junca (Allium fistulosum) cultivada na Colômbia, como ou uso de GC-MS. O método usado tem alta sensibilidade (LOD: 0.11-7.15 µg kg-¹), precisão aceitável precision (RSD: 0.83-1.35%) e percentagens de recuperações entre 46.32% - 118.67%. Pesticidas clorados proibidos pela Convenção de Roterdã foram encontrados nas amostras com concentrações acima de 221.22 μg kg-¹, enquanto endrin com uma concentração de 469.23 μg kg-¹ e seus produtos de degradação que excedem o limite máximo de resíduos (LMR) para amostras de plantas. De acordo como LMR do Codex Alimentarius, constatou-se que 73.1% das amostras têm residual superior ao limite permitido de pesticidas organoclorados em mais de 40 vezes, o que representa um risco para a saúde humana e ecossistema. Monitoramento contínuo e rigoroso controle governamental são necessários para reduzir a exposição de seres humanos e outros seres vivos.

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Introducción. Al realizar una gastrectomía distal, el remanente gástrico es irrigado por los vasos gástricos cortos. En este estudio presentamos una serie de casos de gastrectomía distal laparoscópica, con la variante de preservar la rama superior de la arteria gástrica izquierda, con un remanente gástrico pequeño. Métodos. Estudio observacional con intensión analítica, seguimiento de una cohorte retrospectiva de pacientes con cáncer gástrico sometidos a gastrectomía distal radical laparoscópica entre enero 2017 y junio 2019. Se incluyeron todos los pacientes con cáncer gástrico a quienes se les realizó gastrectomía distal radical por laparoscopia. Se estudiaron variables clínicas de los pacientes, variables intraoperatorias, información relacionada con el informe de patología y las complicaciones de la anastomosis gastro-yeyunal. Resultados. Se revisó un total de 61 historias clínicas de pacientes sometidos a gastrectomía distal por laparoscopia, entre quienes se encontró la preservación de la rama ascendente de la arteria gástrica izquierda en el 73,8 % de los pacientes (n=45). El promedio de ganglios resecados fue de 24. Se presentaron un total de 10 complicaciones, ocho relacionadas con la anastomosis (tres estenosis, cuatro filtraciones y un paciente con hemorragia del tracto digestivo superior), y dos con colecciones intrabdominales. En el análisis estadístico no se encontró relación entre la preservación de la rama ascendente de la arteria gástrica izquierda con la presencia de complicaciones. Discusión. La variación que presentamos de la técnica de la gastrectomía distal por laparoscopia cumple con los requisitos oncológicos en los pacientes con cáncer gástrico y no se relaciona con complicaciones de la anastomosis gastro-yeyunal

Introduction. When performing a distal gastrectomy, the gastric remnant is supplied by the short gastric vessels. In this study we present a series of cases of laparoscopic distal gastrectomy, with the variant of preserving the superior branch of the left gastric artery, with a small gastric remnant.Methods. Observational study, follow-up of a retrospective cohort of patients with gastric cancer who underwent laparoscopic radical distal gastrectomy between January 2017 and June 2019. All patients with gastric cancer who underwent laparoscopic radical distal gastrectomy were included. Clinical variables of the patients, intraopera-tive variables, information related to the pathology report and complications of the gastro-jejunal anastomosis were studied.Results. A total of 61 medical records of patients undergoing laparoscopic distal gastrectomy were reviewed; pres-ervation of the ascending branch of the left gastric artery was found in 73.8% of the patients (n = 45). The average number of lymph nodes resected was 24. There were a total of 10 complications, eight related to the anastomosis (three strictures, four leaks and one patient with bleeding from the upper digestive tract), and two patients who presented intra-abdominal collections. No statistical relationship was found between the preservation of the ascending branch of the left gastric artery and the presence of complications.Discusion. The variation that we present of the laparoscopic distal gastrectomy technique meets the oncological requirements in patients with gastric cancer and is not related to complications of the gastrojejunal anastomosis.

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By 2050, the world population will reach 9.2 billion, increasing the food demand by twice. Lowering loss due to pests is still challenging, where pesticides play an important role, but its indiscriminate use causes inadequate residual amounts to be present in foods. This study aims to monitor the organochlorine and organophosphorus pesticide residuality in Allium fistulosum cultivated in Risaralda, Colombia using gaschromatography - mass spectrometry (GC-MS). This method presented a highly sensitive (LOD: 0.11-7.15 µg kg-¹), acceptable precision (RSD: 0.83-1.35%) and recoveries percentages between 46.32% - 118.67%. A greater presence of organochlorine pesticides banned or severely restricted by the Rotterdam agreement, such as 4,4'-DDT, was reported in samples of Allium fistulosum, with concentrations up to 221.22 μg kg-¹, while endrin with a concentration of 469.23 μg kg-¹ and its degradation products which exceed the maximum residue limite (MRL) for plant samples, reported by the Codex Alimentarius. According to this MRL, it was found that 73.1% of the samples have residual exceeding the allowed limit of organochlorine pesticides by more than forty times, posing a risk to human health and the ecosystem. Continuous monitoring and strict governmental control are required to reduce the exposure of humans and other living beings.(AU)

Em 2050 a população mundial chegará a 9.2 bilhões, aumentando a demanda por alimentos em duas vezes. Diminuir as perdas devido a pragas ainda é um desafio, onde os pesticidas desempenham um papel importante, mas seu uso indiscriminado faz com que quantidades residuais inadequadas estejam presentes nos alimentos. Este estudo tem como objetivo monitorar a concentração residual de pesticidas organoclorados e organofosforados em cebola junca (Allium fistulosum) cultivada na Colômbia, como ou uso de GC-MS. O método usado tem alta sensibilidade (LOD: 0.11-7.15 µg kg-¹), precisão aceitável precision (RSD: 0.83-1.35%) e percentagens de recuperações entre 46.32% - 118.67%. Pesticidas clorados proibidos pela Convenção de Roterdã foram encontrados nas amostras com concentrações acima de 221.22 μg kg-¹, enquanto endrin com uma concentração de 469.23 μg kg-¹ e seus produtos de degradação que excedem o limite máximo de resíduos (LMR) para amostras de plantas. De acordo como LMR do Codex Alimentarius, constatou-se que 73.1% das amostras têm residual superior ao limite permitido de pesticidas organoclorados em mais de 40 vezes, o que representa um risco para a saúde humana e ecossistema. Monitoramento contínuo e rigoroso controle governamental são necessários para reduzir a exposição de seres humanos e outros seres vivos.(AU)

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Resumen La garrapata común (Rhipicephalus (B.) microplus) del ganado es considerada el ectoparásito más importante en la ganadería. El uso repetitivo y tradicional de acaricidas comerciales se ha convertido en un serio problema en cuanto a la resistencia adquirida por esta garrapata. Por esta razón, el control biológico ha surgido como una alternativa prometedora en el control de este ectoparásito. En este estudio se evalúa el efecto de los extractos vegetales de dos plantas, J. curcas y A. muricata, sobre el índice de producción de huevos y la eficiencia reproductiva de R (B.) microplus bajo condiciones de laboratorio. Cada extracto fue evaluado a cinco concentraciones (entre 0.1 y 5%), usando controles negativo y positivo para su comparación. Ambas plantas mostraron actividad biológica, sin embargo, A. muricata tuvo un efecto mayor comparado con J. curcas, inclusive a concentraciones bajas (0,5 y 1 %). Por el contrario, J. curcas mostró solo un efecto moderado en concentraciones altas (5%). En conclusión, los resultados obtenidos en laboratorio indican que los extractos de A. muricata son promisorios para controlar la garrapata común del ganado.

Abstract Rhipicephalus (B.) microplus or common cattle tick is considered the most important ectoparasite of livestock. Traditional and repetitive control of this tick through the use of conventional products has become a serious problem regarding tick's resistance. For this reason, biological control has emerged as a very promising alternative to control this tick. In the present study, an experiment was designed to assess the effect of plant extracts of J. curcas y A. muricata on Production eggs Index (IPH) and estimated reproduction (ER) of R (B) microplus under laboratory conditions. Each plant extract was assessed in five different concentrations (between 0.1 and 5%); a positive and negative control was used for comparison. Both plants showed biological activity, however, A. muricata showed significantly effect on engorged females of the cattle tick compared with J. curcas, even at lower concentrations (0.5, and 1 %). In conclusion, the results obtained indicate that A. muricata's seed extracts are promissory to biocontrol the common cattle tick under laboratory conditions.

Resumo O carrapato comum (Rhipicephalus (B.) microplus) do gado é considerado o ectoparasita mais importante da pecuária. O uso repetitivo e tradicional de inseticidas comerciais se converteu em um sério problema quanto a resisitência adquirida por esse carrapato. Por essa razão, o controle biológico surgiu como uma alternativa promissora no controle deste ectoparasita. Esse estudo avalia o efeito dos extratos vegetais das plantas,J. curcas e A. muricata,sobre o índice de produção de ovos e a eficiência reprodutiva deR (B.) microplussegundo condições de laboratório. Cada extrato foi avaliado em 5 concentrações (entre 0,1 e 5%), usando controles negativo e positivo para sua comparação. Ambas as plantas mostraram atividade biológica, porém,A. muricatateve um efeito maior comparado comJ. curcas,inclusive as concentrações baixas (0,5 y 1 %). Pelo contrário,J. curcasmostrou só um efeito moderado nas concentrações altas (5%). Em conclusão, os resultados obtidos no laboratório indicam que os extratos deA. muricatasão promissores para controlar o carrapato comum do gado.

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Introducción: el tratamiento con metadona constituye el estándar de manejo de adictos a heroína. Durante la rehabilitación los pacientes mejoran su estado de salud y parecen volverse inmunocompetentes; hecho atribuido al abandono de prácticas de riesgo, mejor nutrición y suspensión de la heroína, cuyo efecto inmunodepresor es conocido. Pero como la metadona es también antagonista del glutamato, podría teneractividad inmunoestimulante adicional.Objetivo: comparar niveles séricos de las citoquinas FNT-α, IFN-γ e IL-10, entre adictos a heroína en consumo activo (CA=32), adictos tratados con metadona (Met=20) y controles sanos sin historia de adicción (Cont=20).Materiales y métodos: participaron 72 individuos de ambos sexos, mayores de edad, con pruebas serológicas para VIH/SIDA, hepatitis B y C negativas, que no utilizaran fármacos con efectos sobre el sistema inmune. Resultados: no hubo diferencias entre los grupos respecto a género (91,7% hombres), edad (25,2 ± 8 años) y tiempo de abuso de heroína (5,3 ± 2,9 años). Todos los adictosreportaron consumo de otras drogas ilícitas: 96% marihuana, 79 por ciento cocaína/basuco y 52 por ciento otros psicoactivos. Ningún individuo del grupo Met seguía consumiendo cocaína/basuco, pero la mayoría continuaba el consumo de marihuana. Se encontrarondiferencias significativas en los niveles de FNT-α (p=0,0004), IFN-γ (p=0,014) e IL- 10 (p=0,0001) entre los tres grupos estudiados; esta diferencia se conserva para las tres citoquinas cuando se comparan adictos con no adictos.Conclusión: se encontró un patrón de producción de citoquinas séricas diferencial entre adictos y no adictos, pero no fue posible determinar un patrón de respuesta inmune inducido por metadona.

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