Lower glycemia levels in subjects with excessive erythrocytosis during the oral glucose tolerance test living in conditions of severe hypoxia.

Background: Previous studies showed that residents of higher elevations have lower glucose levels. Our objective in this study is to determine the basal and postprandial glucose levels in apparently healthy permanent residents of the miner population center of La Rinconada located 5100 meters (m) above sea level. Method: Forty male permanent residents of the Rinconada miner population center were studied. The oral glucose tolerance test was used to evaluate basal and postprandial glycemia levels at 1, 2, and 3 h. Results: The individuals had a mean age of 43.95 ± 8.54 years. Basal glycemia in subjects without excessive erythrocytosis (EE) was 73.3 ± 7.9 mg/dL, while levels in patients with EE were 57.98 ± 7.38 mg/dL. In the postprandial period, at 1 h after oral glucose overload, a mean value of 76.35 ± 13.53 mg/dL was observed in subjects with EE compared to 94.68 ± 9.98 mg/dL in subjects without EE. After 2 h, subjects with EE had a glycemia level of 72.91 ± 9.17 mg/dL EE compared to 90.73 ± 13.86 mg/dL without EE. At 3 h, the average glycemia level in subjects with EE was 70.77 ± 8.73 mg/dL compared to 87.79 ± 14.16 mg/dL in those without EE. Conclusion: These findings suggest that under hypoxic conditions, glycemia levels are lower in both subjects with and without EE, having obtained lower levels in subjects with EE in relation to those with normal values of Hb and Hct. The results of this study indicate that in the conditions of severe hypoxia, blood glucose levels are below the values considered normal for sea level.

Características clínicas y epidemiológicas e impacto de medidas no farmacológicas en la evolución de la epidemia por COVID-19 en pobladores de una región a gran altura del Perú

Objetivo: Describir las características clínicas y epidemiológicas y el impacto de las medidas no farmacológicas (MNF) en la evolución de la epidemia por COVID-19 en pobladores de una región de gran altura del Perú. Materiales y métodos: El estudio fue desarrollado en el distrito de Lircay, a 3278 m s. n. m., provincia de Angaraes, departamento de Huancavelica, entre el 31 de marzo del 2020 y el 31 de enero del 2021 (periodo de la cuarentena). La Oficina de Informática del Hospital Minsa II-1 de Lircay proporcionó el total de los registros de pacientes con diagnóstico de COVID-19, que se empleó en el periodo de estudio mencionado. Se evaluaron las características clínicas y epidemiológicas y el impacto de las MNF mediante la determinación de la transmisibilidad del virus por medio del número efectivo de reproducción (Rt). Resultados: Se estudiaron 1404 pacientes con diagnóstico de COVID-19 del distrito de Lircay, quienes se atendieron en el Hospital Minsa II-1 de Lircay. La mediana de edad fue de 33 años (RIQ: 24,0-45,0), el 10,7 % fueron adultos mayores y el 70 % no reportó comorbilidades al momento del diagnóstico. El 2,16 % de los participantes tuvo un cuadro moderado o grave, y se presentó con más frecuencia en varones (p < 0,001); asimismo, las comorbilidades asociadas significativamente fueron la obesidad (p < 0,001) y la hipertensión arterial (p = 0,004). La tasa de letalidad promedio fue de 0,9 %, sin embargo, en casos moderados-graves alcanzó el 26,7 % (p < 0,001); la población adulto mayor fue la más afectada. La cuarentena focalizada como MNF determinó un Rt de 2,98 (IC 95 %: 1,54-5,14) en el mes de julio, y el cese de la cuarentena más la reactivación económica determinó un Rt de 9,94 (IC 95 %: 4,19-19,45) en el mes de diciembre. Después del periodo de las festividades navideñas, se instauró la cuarentena focalizada y, 14 días después, se observó una reducción del Rt hasta en 0,79 (IC 95 %: 0,41-1,36). Conclusiones: En esta región de gran altura, la tasa de letalidad global por COVID-19 fue baja; esto podría relacionarse con las características de la población (menor edad y baja prevalencia de comorbilidades). Aparentemente, la cuarentena resultó ser una medida efectiva para el control de la transmisibilidad del SARS-CoV-2.

Objective: To describe the clinical and epidemiological characteristics and the impact of non-pharmacological measures (NFMs) on the evolution of the COVID-19 pandemic among residents of a high-altitude region of Peru. Materials and methods: The study was conducted in the district of Lircay (3,278 m a.s.l.), province of Angaraes, department of Huancavelica, between March 31, 2020, and January 31, 2021 (lockdown period). The Information Technology Department at Hospital Lircay MINSA II-1 provided all COVID-19 patient records used during the aforementioned period of time. The clinical and epidemiological characteristics and the impact of NFMs were evaluated by determining the transmissibility of the virus using the effective reproduction number (Rt). Results: A total of 1,404 COVID-19 patients from the district of Lircay, who were treated at Hospital Lircay MINSA II-1, were studied. The median age was 33 years (IQR: 24.0-45.0); 10.7 % were older adults and 70 % reported no comorbidities at diagnosis. Out of all participants, 2.16 % had a moderate or severe condition, being more frequent in males (p < 0.001). Moreover, the significantly associated comorbidities were obesity (p < 0.001) and hypertension (p = 0.004). The average case fatality rate was 0.9 %; however, in moderate-severe cases, it reached 26.7 % (p < 0.001), and the elderly population was the most affected one. The lockdown, understood as an NFM, generated an Rt of 2.98 (95 % CI: 1.54-5.14) in July, and the end of the lockdown plus the economic recovery generated an Rt of 9.94 (95 % CI: 4.19-19.45) in December. After Christmas, focused lockdown was introduced and, 14 days later, an Rt reduction of up to 0.79 (95 % CI: 0.41-1.36) was observed. Conclusions: In this high-altitude region, the COVID-19 overall case fatality rate was low; this could be related to the characteristics of the population (young age and low prevalence of comorbidities). Lockdown apparently proved to be an effective measure for controlling SARS-CoV-2 transmissibility.

Automedicación y uso de plantas medicinales en estudiantes universitarios de la Amazonía Peruana durante la primera ola por COVID-19

Introducción: La expansión acelerada del SARS-CoV-2 trajo consigo una crisis mundial, y una serie de estudios y recomendaciones para manejarlo; mientras que estudios previos a la pandemia, evidencia elevada prevalencia de automedicación en estudiantes universitarios. Objetivo: Identificar la frecuencia y características de automedicación contra la COVID-19 con fármacos y/o plantas medicinales en los estudiantes de la Universidad Nacional de la Amazonía Peruana (UNAP), Iquitos, Loreto-Perú, durante la primera ola por COVID-19. Material y Métodos: Se realizó un estudio descriptivo de corte transversal en 338 estudiantes mediante una encuesta semiestructurada ad-hoc con preguntas distribuidas en 3 dimensiones: características sociodemográficas, características de COVID-19 y características del uso de fármacos/plantas medicinales. Resultados: El promedio de la edad fue 22,39 años (DE ± 5,59), predomino el sexo femenino con 61,2 % (n=207), el 55,3% (n=187) presentaron síntomas sugestivos de COVID-19. Además, el 76,9% (n=260) utilizaron medicación, distribuido de mayor a menor 65,4 % (n=170) fármacos y plantas, 25,8 % (n=67) solo plantas, y 8,8 % (n=23) solo fármacos; incurrieron en automedicación el 79,2% (n=206). Los principales fármacos empleados fueron dexametasona, paracetamol, azitromicina, e ivermectina. Las plantas medicinales principalmente empleadas fueron eucalipto, kion, manzanilla y matico. Se presentó probable asociación a la automedicación con antecedente de síntomas sugestivos de COVID-19 (p=0.001, IC 95%), y contacto de COVID-19 (p=0,011, IC 95%). Conclusión: Entre los estudiantes de una universidad de la Amazonía Peruana, se identificó elevada prevalencia y los factores asociados a la automedicación con fármacos y plantas medicinales.

Introduction: The accelerated spread of SARS-CoV-2 brought about a worldwide crisis, and a series of studies and recommendations to manage it. Before the pandemic, studies evidence a high prevalence of self-medication in university students. Objective: To identify the frequency and characteristics of self-medication against COVID-19 with drugs and/or medicinal plants in students of the National University of the Peruvian Amazon (UNAP), Iquitos, Loreto-Peru, during the first wave of COVID-19. Material and Methods: A descriptive cross-sectional study was conducted on 338 students using a semi-structured ad-hoc survey with questions distributed in 3 dimensions: sociodemographic characteristics, characteristics of COVID-19, and characteristics of the use of drugs/medicinal plants. Results: The mean age was 22.39 years (SD ± 5.59), female sex predominated with 61.2 % (n=207), and 55.3 % (n=187) presented symptoms suggestive of COVID-19. In addition, 76.9% (n=260) used medication, distributed from highest to lowest 65.4% (n=170) drugs and plants, 25.8% (n=67) only plants, and 8.8% (n=23) only drugs; 79.2% (n=206) used self-medication. The main drugs used were dexamethasone, paracetamol, azithromycin, and ivermectin. The main medicinal plants used were eucalyptus, kion, chamomile, and matico. There was a probable association between self-medication and a history of symptoms suggestive of COVID-19 (p=0.001, 95% CI), and COVID-19 contact (p=0.011, 95% CI). Conclusion: Among students of a university in the Peruvian Amazon, a high prevalence and factors associated with self-medication with drugs and medicinal plants were identified.

HLA-G 3'UTR haplotype frequencies in highland and lowland South Native American populations.

Human Leukocyte Antigen (HLA)-G participates in several biological processes, including reproduction, vascular remodeling, immune tolerance, and hypoxia response. HLA-G is a potential candidate gene for high altitude adaptation since its expression is modulated in both micro and macro environment under hypoxia and constant cellular stress. Besides the promoter region, the HLA-G 3'untranslated region (UTR) influences HLA-G expression patterns through several post-transcriptional mechanisms. Currently, the 3'UTR genetic diversity in terms of altitude adaptation of Native American populations is still unexplored, particularly at high altitude ecoregions. Here, we evaluated 288 Native Americans from 9 communities located in the Andes [highland (HL); ≥2,500 m (range = 2,838-4,433 m)] and 8 populations located in lowland (LL) regions [<2,500 m (range = 80-431 m); Amazonian tropical forest, Brazilian central plateau, and Chaco] of South America. In total, nine polymorphic sites and ten haplotypes were observed. The most frequent haplotypes (UTR-1, UTR-2, and UTR-3) accounted for âˆ¼ 77% of haplotypes found in LL, while in the HL, the same haplotypes reach âˆ¼ 93%. Also, a remarkable high frequency of putative ancestral UTR-5 haplotype was observed in LL (21.5%), while in HL UTR-2 reaches up to 47%. Further, UTR-2 frequency positively correlates with altitude-related variables, while a negative correlation for UTR-5 was observed. From an evolutionary perspective, we observed a tendency towards balancing selection in HL and LL populations thus suggesting that haplotypes of ancient and more derived alleles may have been co-opted for relatively recent adaptations such as those experienced by modern humans in the highland and lowland of South America. We also discuss how long-term balancing selection can be a reservoir of genetic variants that can be positively selected. Finally, our study provides some pieces of evidence that HLA-G 3'UTR haplotypes may have contributed to high altitude adaptation in the Andes.

Clinical characteristics of older patients with COVID-19: a systematic review of case reports.

In the context of the current COVID-19 pandemic, higher morbidity and mortality have been reported in older adults. This age group presents physiological changes and its own clinical conditions such as frailty, dementia, among others. OBJECTIVE: To describe the characteristics of COVID-19 patients, both over and under 80 years old, by conducting a systematic review of the literature describing case reports, and to summarize and critically assess these characteristics. METHODS: Systematic review. The study was registered on the Registry of Health Research Projects (PRISA) of the Peruvian National Institute of Health (code EI00000631). Five electronic databases (Scopus, PubMed, PubMed Central, LILACS, and SCIELO) were systematically searched during the period between December 31, 2019 and April 16, 2020. The search focused on case reports, case studies, and case series of older people with COVID-19 infection aged over or under 80 years. When selecting the cases, priority was given to clinical and epidemiological profile, laboratory and imaging patterns, and comprehensive geriatric evaluation. RESULTS: 1,149 articles were identified; after applying the filters, a total of 15 publications of case reports and complete records of 27 older adults were obtained. The most frequent age group was between 60 to 69 years old. There is little literature regarding case reports of older adults aged over 80 years. The most frequent parameters were hypertension, fever, cough, respiratory distress, ground-glass opacification in chest radiography and tomography. Furthermore, decrease in PaO2/FiO2 ratio and lymphocytes, and increase in C-reactive protein and Interleukin 6 were observed. CONCLUSIONS: This systematic review found little available information of patients under 80 years old, and far less for those over 80 years old, and an absence of comprehensive geriatric assessment.

No contexto da atual pandemia de covid-19, maior morbidade e mortalidade têm sido relatadas em idosos. Sabe-se que essa faixa etária apresenta alterações fisiológicas e condições clínicas próprias, como fragilidade, demência, entre outras. OBJETIVO: Descrever as características de pacientes com covid-19, maiores e menores de 80 anos, por meio de uma revisão sistemática da literatura que descreve relatos de casos, e resumir e avaliar criticamente essas características. MÉTODO: Revisão sistemática. O estudo foi registrado no Registro de Projetos de Pesquisa em Saúde (PRISA) do Instituto Nacional de Saúde do Peru (código EI00000631). Local: cinco bases de dados eletrônicas (Scopus, PubMed, PubMed Central, LILACS e SCIELO) foram sistematicamente pesquisadas entre 31 de dezembro de 2019 e 16 de abril de 2020. A busca se concentrou em relatos de caso, estudos de caso e séries de casos mais antigos pessoas com infecção por SARS-CoV-2 com mais e menos de 80 anos. Na seleção dos casos, a prioridade foi dada ao perfil clínico e epidemiológico, padrões laboratoriais e de imagem, e avaliação geriátrica abrangente. RESULTADOS: Foram identificados 1.149 artigos. Após a aplicação dos filtros, obteve-se um total de 15 publicações de relatos de caso e registros completos de 27 idosos. A faixa etária mais frequente foi de 60 a 69 anos. Há pouca literatura sobre relatos de casos de adultos com mais de 80 anos. Os parâmetros mais frequentes foram hipertensão, febre, tosse, dificuldade respiratória, vidro fosco na radiografia e tomografia de tórax. Também foram observados diminuição da PaO2 / FiO2 e linfócitos, e aumento da proteína C reativa e Interleucina 6. CONCLUSÕES: Esta revisão sistemática encontrou poucas informações disponíveis sobre pacientes com menos de 80 anos, em quantidade ainda menor para aqueles com mais de 80 anos, além de uma ausência de avaliação geriátrica abrangente.

Reporte de consumo de plantas medicinales en gestantes del Centro de Salud Viña Alta, La Molina. Lima, Perú

El objetivo de este trabajo fue conocer la frecuencia y la manera en que las plantas medicinales son empleadas por las gestantes del Centro de Salud Viña Alta del distrito de La Molina. En el estudio participaron veintiuna gestantes, quienes respondieron una encuesta, validada por expertos, sobre el uso de plantas medicinales. Se demostró que el 86,00 % de las gestantes utilizaron plantas medicinales, y que 67,00 % no consultó con un médico sobre su empleo. La manera más frecuente de consumo de las plantas medicinales fue la vía oral, en forma de infusiones. Las plantas medicinales más utilizadas fueron manzanilla, perejil, eucalipto, boldo, aloe, menta y ruda; y algunas de ellas mostraron efecto teratogénico, estimulante uterino, abortivo, entre otros. Es necesario conocer la cantidad real y la manera más frecuente en que las gestantes consumen las plantas medicinales, con la finalidad de clasificar estos productos de acuerdo al nivel de seguridad que ofrecen y promover el uso racional de la medicina tradicional para contribuir en la salud pública.

This research aimed to find out the frequency and ways of using medicinal plants by pregnant women treated at the Centro de Salud Viña Alta, located in La Molina district. Twenty-one (21) pregnant women voluntarily participated in the study, where they were administered an expert-validated survey regarding the use of medicinal plants. The results showed that 86 % of the pregnant women used medicinal plants and 67 % did not ask their doctor before using them. The most frequent way of using the medicinal plants was by oral intake as herbal teas. The most widely used medicinal plants were chamomile, parsley, eucalyptus, boldo, aloe, mint and rue, some of which produced a teratogenic effect, uterine stimulant action, abortifacient effect, among others. It is necessary to know the actual quantity and most frequent way of using medicinal plants by pregnant women to classify these products as for its safety level and promote the rational use of traditional medicine to contribute to public health.

Clinical characteristics of older patients with COVID-19: a systematic review of case reports / Características clínicas de pacientes idosos com covid-19: uma revisão sistemática de relatos de casos

ABSTRACT. In the context of the current COVID-19 pandemic, higher morbidity and mortality have been reported in older adults. This age group presents physiological changes and its own clinical conditions such as frailty, dementia, among others. Objective: To describe the characteristics of COVID-19 patients, both over and under 80 years old, by conducting a systematic review of the literature describing case reports, and to summarize and critically assess these characteristics. Methods: Systematic review. The study was registered on the Registry of Health Research Projects (PRISA) of the Peruvian National Institute of Health (code EI00000631). Five electronic databases (Scopus, PubMed, PubMed Central, LILACS, and SCIELO) were systematically searched during the period between December 31, 2019 and April 16, 2020. The search focused on case reports, case studies, and case series of older people with COVID-19 infection aged over or under 80 years. When selecting the cases, priority was given to clinical and epidemiological profile, laboratory and imaging patterns, and comprehensive geriatric evaluation. Results: 1,149 articles were identified; after applying the filters, a total of 15 publications of case reports and complete records of 27 older adults were obtained. The most frequent age group was between 60 to 69 years old. There is little literature regarding case reports of older adults aged over 80 years. The most frequent parameters were hypertension, fever, cough, respiratory distress, ground-glass opacification in chest radiography and tomography. Furthermore, decrease in PaO2/FiO2 ratio and lymphocytes, and increase in C-reactive protein and Interleukin 6 were observed. Conclusions: This systematic review found little available information of patients under 80 years old, and far less for those over 80 years old, and an absence of comprehensive geriatric assessment.

RESUMO. No contexto da atual pandemia de covid-19, maior morbidade e mortalidade têm sido relatadas em idosos. Sabe-se que essa faixa etária apresenta alterações fisiológicas e condições clínicas próprias, como fragilidade, demência, entre outras. Objetivo: Descrever as características de pacientes com covid-19, maiores e menores de 80 anos, por meio de uma revisão sistemática da literatura que descreve relatos de casos, e resumir e avaliar criticamente essas características. Método: Revisão sistemática. O estudo foi registrado no Registro de Projetos de Pesquisa em Saúde (PRISA) do Instituto Nacional de Saúde do Peru (código EI00000631). Local: cinco bases de dados eletrônicas (Scopus, PubMed, PubMed Central, LILACS e SCIELO) foram sistematicamente pesquisadas entre 31 de dezembro de 2019 e 16 de abril de 2020. A busca se concentrou em relatos de caso, estudos de caso e séries de casos mais antigos pessoas com infecção por SARS-CoV-2 com mais e menos de 80 anos. Na seleção dos casos, a prioridade foi dada ao perfil clínico e epidemiológico, padrões laboratoriais e de imagem, e avaliação geriátrica abrangente. Resultados: Foram identificados 1.149 artigos. Após a aplicação dos filtros, obteve-se um total de 15 publicações de relatos de caso e registros completos de 27 idosos. A faixa etária mais frequente foi de 60 a 69 anos. Há pouca literatura sobre relatos de casos de adultos com mais de 80 anos. Os parâmetros mais frequentes foram hipertensão, febre, tosse, dificuldade respiratória, vidro fosco na radiografia e tomografia de tórax. Também foram observados diminuição da PaO2 / FiO2 e linfócitos, e aumento da proteína C reativa e Interleucina 6. Conclusões: Esta revisão sistemática encontrou poucas informações disponíveis sobre pacientes com menos de 80 anos, em quantidade ainda menor para aqueles com mais de 80 anos, além de uma ausência de avaliação geriátrica abrangente.

Referencia de los usos medicinales del chuchuhuasi (Maytenus macrocarpa) por curanderos del distrito de Santa María de Huachipa, Lurigancho, Lima - Perú: un estudio cualitativo / Information on medicinal uses of chuchuhuasi (Maytenus macrocarpa) from folk healers of the district of Santa María de Huachipa, Lurigancho, Lima - Peru: a qualitative study

RESUMEN Objetivo Indagar acerca de las principales indicaciones, propiedades y formas de uso del chuchuhuasi referidas por un grupo de curanderos de Santa María de Huachipa (Lima-Perú). Existen antecedentes de estudios de los usos medicinales del chuchuhuasi (Maytenus macrocarpa) en comunidades nativas de la Amazonía, tanto por el poblador como por indicación del terapeuta tradicional; sin embargo, las referencias del uso y propiedad medicinal del chuchuhuasi en la costa, y en la comunidad urbana son escasas. Materiales y métodos Diez curanderos participaron de forma voluntaria. Se aplicó un cuestionario (mediante entrevista) que indagó acerca del uso del chuchuhuasi (propiedades, efectos adversos, contraindicaciones y formas farmacéuticas). La participación se registró con videograbaciones y luego se transcribió; posteriormente, los datos se categorizaron mediante pares y se definieron por consenso. Resultados Las principales indicaciones de consumo de chuchuhuasi fueron los problemas respiratorios (80,00 %) y osteotendinosos. Las propiedades antiinflamatorias y afrodisíacas fueron las más relevantes; y como efecto adverso se reportó el mareo. El producto estaba contraindicado en gestantes, hipertensos y diabéticos. Además, las principales formas farmacéuticas de consumo fueron el macerado, la pomada y la infusión. Conclusiones Se encontró la referencia del uso del chuchuhuasi en un grupo de curanderos del distrito de Santa María de Huachipa (Lima-Perú). La indicación más importante de su empleo son los problemas respiratorios y se destaca su propiedad antinflamatoria.

ABSTRACT Objective To inquire the main conditions, properties and ways of consumption of chuchuhuasi from a group of folk healers of the district of Santa María de Huachipa (Lima - Peru). There are studies of the medicinal uses of chuchuhuasi (Maytenus macrocarpa) in native communities of the Amazon known by the inhabitants and indicated by folk healers. However, information on the medicinal uses and properties of chuchuhuasi on the coast and in urban communities is rare. Materials and methods Ten folk healers voluntarily participated in the study. An interview questionnaire was administered to inquire the use of chuchuhuasi (properties, adverse effects, contraindications and ways of consumption). The interview was recorded and then transcribed. Afterwards, the data was categorized by peers and defined by consensus. Results: The main conditions for consuming chuchuhuasi were respiratory tract (80 %) and osteotendinous junction problems. The most important properties of chuchuhuasi were its anti-inflammatory and aphrodisiac effects. Dizziness was reported as adverse effect. Chuchuhuasi was contraindicated in pregnancy, hypertension and diabetes. In addition, its main ways of consumption were as spirit, ointment and infusion. Conclusions Information on the medicinal uses of chuchuhuasi was obtained from a group of folk healers of the district of Santa María de Huachipa (Lima - Peru). The main condition for consuming chuchuhuasi was respiratory tract problems, and its anti- inflammatory properties were highlighted.

Estrategias de la Organización Mundial de la Salud en Medicina Tradicional y Reconocimiento de Sistemas de Medicina Tradicional / Strategies of the World Health Organization in Traditional Medicine and Recognition of Traditional Medicine Systems

La Constitución de la Organización Mundial de la Salud (OMS) entró en vigor el 7 de abril de 1948, fecha que conmemoramos cada año mediante el Día Mundial de la Salud , teniendo como definición de la salud a "un estado de completo bienestar físico, mental y social

Traditional medicine and COVID-19, opportunity for the revaluation of Peruvian Medicinal Plants / Medicina tradicional y COVID-19, oportunidad para la revaloración de las Plantas Medicinales Peruanas

En Diciembre del 2019 en Wuhan-China empezó el brote por COVID-19, con 27 pacientes con neumonía viral (fiebre, tos seca, y disnea), el 11 de Marzo del 2020, La Organización Mundial de la Salud (OMS) declara a la infección como una pandemia

Efecto antinociceptivo y antiinflamatorio de la metformina en modelos experimentales en ratón / Antinociceptive and anti-inflammatory effect of metformin in experimental models conducted in mice

Objetivo: Analizar la actividad antiinflamatoria y antinociceptiva de la metformina en un evento agudo de inflamaciónedema y dolor inducido en roedor. Materiales y métodos: Se utilizaron 198 ratones hembras. Se evaluó el efecto antiinflamatorio con la prueba de edema plantar inducido por carragenina en 64 ratones y, para evaluar el efecto sobre el dolor, se utilizó la prueba de placa caliente e inmersión de la cola, con 64 y 70 ratones, respectivamente. En ambos casos se tuvieron grupos controles, placebo y experimentales. Para el análisis se emplearon las pruebas de Shapiro-Wilk, de ANOVA de una cola, de Tukey y correlación de Pearson. Resultados: En el edema de la pata por carragenina, los grupos metformina 50 y 150 mg/kg presentaron efecto antiinflamatorio a la segunda y tercera hora. En la prueba de placa caliente, los grupos metformina 100, 200 y 250 mg/kg presentaron efecto analgésico en la segunda y cuarta hora. En la prueba de inmersión de cola, los grupos metformina 100, 150, 200 y 250 mg/kg presentaron efecto analgésico desde el minuto 15 hasta terminar el experimento; además, el grupo metformina 150 mg/kg tuvo efecto estadísticamente equivalente al grupo control de morfina 10 mg/kg. Conclusiones: Se demuestra la actividad antiinflamatoria y antinociceptiva aguda de metformina a diferentes dosis, en modelos experimentales con ratones.

Objective: To analyze the anti-inflammatory and antinociceptive activity of metformin in an acute event of inflammation-edema and pain induction in rodents. Materials and methods: One hundred ninety-eight (198) female mice were used. The anti-inflammatory effect was evaluated in 64 mice using the carrageenan-induced paw edema test, and the antinociceptive effect was assessed in 64 and 70 mice using the hot plate test and the tail immersion test, respectively. In both cases, there were control, placebo and experimental groups. For the analysis, the Shapiro-Wilk test, one-way ANOVA test, Tukey test and Pearsonian coefficient of correlation were used. Results: In the carrageenan-induced paw edema test, the metformin 50 and 150 mg/kg groups showed an antiinflammatory effect at the second and third hours. In the hot plate test, the metformin 100, 200 and 250 mg/kg groups showed an antinociceptive effect at the second and fourth hours. In the tail immersion test, the metformin 100, 150, 200 and 250 mg/kg groups showed an antinociceptive effect from minute 15 until the end of the experiment. In addition, the metformin 150 mg/kg group had a statistically equivalent effect to the morphine 10 mg/kg control group.

Geographic distribution of the 3435C>T polymorphism of the MDR1 gene in Peruvian populations.

Background The MDR1 gene presents several genetic polymorphisms with pharmacological implications. Therefore, the aim of the present study is to establish the genotype and allele frequencies of 3435C>T polymorphism of MDR1 gene into Peruvian populations (Coastal, Andean and Amazonian ecoregions), even considering the altitude (lowland <2500 m and highland >2500 m). Methods The polymorphism was analyzed by TaqMan genotyping assays in a group of 181 healthy unrelated Peruvian individuals. The comparison of genotype and allele frequencies of 3435C>T polymorphism was made with the Pearson test (X2), and, to calculate the genotype distributions, the Hardy-Weinberg equilibrium (HWE) was used. Results In all populations evaluated in this study, the genotype frequency distributions met HWE assumptions. The comparison between genotype and allele frequencies showed significant differences (p < 0.05), when the Andean, Coastal and Amazonian populations were compared. Also, significant differences (p < 0.05) were obtained when these populations were compared considering their altitudes. Likewise, in comparison with countries like USA, Finland, Nigeria and Kenya, the results showed significant differences (p < 0.05). Conclusions This investigation allowed us to establish the genotype and allele frequencies of 3435C>T polymorphism in different Peruvian populations, considering the geographic localization and even the altitude.

Latin Americans show wide-spread Converso ancestry and imprint of local Native ancestry on physical appearance.

Historical records and genetic analyses indicate that Latin Americans trace their ancestry mainly to the intermixing (admixture) of Native Americans, Europeans and Sub-Saharan Africans. Using novel haplotype-based methods, here we infer sub-continental ancestry in over 6,500 Latin Americans and evaluate the impact of regional ancestry variation on physical appearance. We find that Native American ancestry components in Latin Americans correspond geographically to the present-day genetic structure of Native groups, and that sources of non-Native ancestry, and admixture timings, match documented migratory flows. We also detect South/East Mediterranean ancestry across Latin America, probably stemming mostly from the clandestine colonial migration of Christian converts of non-European origin (Conversos). Furthermore, we find that ancestry related to highland (Central Andean) versus lowland (Mapuche) Natives is associated with variation in facial features, particularly nose morphology, and detect significant differences in allele frequencies between these groups at loci previously associated with nose morphology in this sample.

Influencia de la vía de administración sobre el efecto del extracto etanólico de la semilla de Jatropha curcas L, en la motilidad intestinal en ratones albinos / Influence of the route of administration on the effect of ethanol extract of the Jatropha curcas L. seeds, on gut motility of albino mice

Objetivo: Determinar la influencia de la vía de administración sobre efecto de distintas dosis del extracto etanólico de la semilla de Jatropha curcas L en la motilidad intestinal de ratones. Materiales y Métodos: Se utilizaron ratones albinos machos con un peso promedio de 23 g, a los que, por vía oral e intraperitoneal, y a dosis escalonadas y no tóxicas, se les administraron extracto etanólico de la semilla de Jatropha curcas L. Los grupos experimentales fueron: suero fisiológico 0,1 mL/10 g, atropina 1 mg/Kg, extracto etanólico de semilla de Jatropha curcas L. 500, 750 y 1000 mg/Kg, respectivamente, y neostigmina 0,4 mg/Kg. Para la validación estadística se usó ANOVA con post-hoc de Sidak. Resultados: Se encontró diferencias significativas al analizar los porcentajes de motilidad intestinal de todos los grupos, sin embargo, al realizar la comparación por parejas solo se halló diferencias entre los grupos que recibieron atropina y neoestigmina (p=0,038), J. curcas L. vía oral a dosis de 500 mg/Kg y 1000 mg/Kg (p=0,001 en ambos casos). Se encontraron diferencias significativas (p>0,05) en las comparaciones entre la administración por vía oral y por vía peritoneal del extracto de J. curcas L. a dosis de 500 mg/Kg y 1000 mg/Kg. Conclusión: Se encontró influencia de la vía de administración, sobre el efecto del extracto etanólico de Jatropha curcas L. en la la motilidad intestinal en ratones albinos.

Objectives. To determine the influence of administration route of Jatropha curcas L. seeds ethanolic extract (in different doses) on intestinal motility of albino mice. Methods. Male albino mice were used with an average weight of 23 g., which the ethanolic extract of Jatropha curcas L. seeds were administered in different administration routes (oral and intraperitoneal), using staggered and non-toxic doses. The experimental groups were 0,1 mL/10 g physiological saline, atropine 1mg/Kg, neostigmine 0.4 mg/kg and Jatropha curcas L seed ethanolic extract in doses of 500, 750 and 1000mg/kg. One-way ANOVA test with Sidak post-hoc test were used to do a statistical inferences. Results. Significant differences were found when all-groups intestinal charcoal transit distance (%) were analyzed. However, when paired comparisons were made, significant differences were found between neostigmine group (p=0,038); and oral administration of J curcas L extracts in doses of 500 mg/Kg and 1000 mg/Kg (p=0.001 in both cases). Significant differences were found (p>0.05) in comparisons made between orally and intraperitoneal administration of J. curcas L. extract in doses of 500 mg/Kg and 1000 mg/Kg. Conclusion. There is some influence caused by route of administration of Jathropa curcas L. seeds ethanolic extract on intestinal motility in albino mice.

Diferencias en la presencia de alcaloides y fenoles de cinco muestras de muña de expendio informal procedentes de mercados populares en Lima - Perú / Differences in the presence of alkaloids and phenols in five informally traded muña samples from traditional markets in Lima - Peru

Objetivo: Demostrar la presencia de alcaloides y fenoles en la rama florida de Minthostachys mollis (muña) y comparar los resultados con los de cinco muestras de muña de expendio informal obtenidas en Lima ­ Perú. Materiales y métodos: Minthostachys mollis fue colectada en Junín (ubicado a 321 km de Lima y a 4113 m s.n.m) Perú, siguiendo la metodología de Cerrate E. y Ramagosa, siendo identificada por una especialista en botánica. Otras cinco muestras se obtuvieron bajo venta sin registro sanitario. La marcha fitoquímica fue realizada mediante el método de Olga Lock. Fueron referentes cualitativos empleados: "+++" (abundante), "++" (moderado), "+" (leve) y "-" (ausencia). Resultados: Minthostachys mollis presentó alcaloides "++", en contraste, M1, no presentó, M3 "+" y M2, M4 y M5 "++". Para fenoles, M. mollis presentó "+++", en comparación, M4 "++", y M1, M2, M3 y M5 "+++". Conclusiones: Frente a M. mollis, se demostraron diferencias cualitativas en la presencia de los metabolitos estudiados en las muestras de expendio informal.

Determinación del nivel de dosis del ácido valproico e influencia de los fármacos inductores y no inductores enzimáticos en pacientes voluntarios de la ciudad de Mérida, Venezuela / Determination of valproic acid dose level and influence of enzyme-inducing and non-enzyme-inducing drugs in volunteer patients of the city of Mérida, Venezuela

Objetivo: Determinar los niveles/dosis (ND) del ácido valproico y la influencia de los fármacos inductores y no inductores enzimáticos en pacientes voluntarios de la ciudad de Mérida-Venezuela. Materiales y métodos: Se realizó un estudio experimental, observacional, prospectivo de corte transversal, en el Hospital de Mérida-Venezuela. Luego de pasar por los criterios de inclusión y exclusión, los pacientes firmaron el consentimiento informado en forma individual y voluntaria.El protocolo consistió en obtener la sangre de 88 pacientes (42 hombres y 46 mujeres) con edades entre 16 y 68 años, que sufrían de convulsiones parciales o generalizadas y que estaban recibiendo 3,97-38,04 mg/kg de ácido valproico (AVP) dos veces al día en monoterapia o en combinación con carbamacepina (CBZ), fenobarbital (PB), fenitoína (PHT), lamotrigina (LTG) y oxcarbacepina (OXC). Se tomó la muestra después de cuatro semanas de tratamiento, en condiciones de ayuno y antes de la administración del medicamento del presente día, para determinar posteriormente la concentración plasmática por medio del método de radioinmunoensayo. Con los datos de la concentración plasmática se determinó el ND. Resultados: En monoterapia con AVP se encontró que la concentración plasmática media era de 64,94 mg/l (DE 31,7) y el ND de 4,32 (DE 2,1). En combinación de AVP+CBZ+PB se obtuvo un ND de 2,31 (DE 0,06), con la combinación AVP+PB+PHT se obtuvo el ND de 2,46 (DE 0,43) y con la combinación AVP+PB+OXC se obtuvo un ND de 4,63 (DE 3,12). Conclusiones: Los fármacos administrados en forma concomitante influyen sobre la concentración plasmática y el ND del AVP en un grupo de pacientes de Mérida-Venezuela.

Objective: To determine valproic acid level/dose ratio (ND) and the influence of enzyme-inducing and non-enzymeinducing drugs in volunteer patients of the city of Mérida, Venezuela. Materials and methods: An experimental, observational, prospective, cross-sectional study was conducted at the Hospital de Mérida, Venezuela. After undergoing the inclusion and exclusion criteria process, patients signed an informed consent individually and voluntarily. The protocol consisted in collecting blood from 88 patients (42 males y 46 females) from 16 to 68 years old, who had partial or generalized seizures, and were receiving 3.97-38.04 mg/kg of valproic acid (AVP) twice a day as monotherapy or combination therapy with carbamazepine (CBZ), phenobarbital (PB), phenytoin (PHT), lamotrigine (LTG) and oxcarbazepine (OXC). A sample was taken after four weeks of treatment, in the fasting state and before the administration of the medication of the day. Afterwards, plasma concentration was determined through a radioimmunoassay method. The ND was established using the plasma concentration data. Results: AVP monotherapy showed a mean plasma concentration of 64.94 mg/l (SD 31.7) and ND of 4.32 (SD 2.1). Combination therapy with AVP+CBZ+PB showed an ND of 2.31 (SD 0.06), combination therapy with AVP+PB+PHT showed an ND of 2.46 (SD 0.43) and combination therapy with AVP+PB+OXC showed an ND of 4.63 (SD 3.12). Conclusions: The administration of concomitant drugs affected plasma concentration and AVP ND in a group of patients of the Hospital de Mérida, Venezuela.

Cribado fitoquímico del Baccharis latifolia (R&P.) Pers. (chilca) / Phytochemical screening of Baccharis latifolia (R&P.) Pers. (chilca)

Introducción: Baccharis latifolia (R.&P.) Pers. (chilca), es una especie espontánea que crece en las riberas de los ríos. En el Perú abunda y habita entre 1000 y 4000 m. Es una planta dioica arbustiva de 1 a 2 m de altura. Presenta tallo cilíndrico, estriado longitudinalmente; hojas simples, alternas, pecioladas; limbo aovado-lanceolado; capítulo en cimas corimbosas y aquenio cilíndrico.mObjetivo: identificar metabolitos secundarios de interés medicinal en las hojas de B. latifolia. Métodos: para la colección del material botánico se emplearon los métodos de Cerrate y Ramagosa et al. El cribado fitoquímico se realizó por el método de Olga Lock. Por colorimetría, se catalogó cualitativamente la presencia del metabolito en "+++" (abundante), "++" (moderado), "+" (leve) y "-" (ausencia). Se evaluó la presencia de los siguientes metabolitos: alcaloides, fenoles, flavonoides, carbohidratos, aminoácidos y lípidos. Resultados: los metabolitos detectados con alta presencia fueron los fenoles (+++) en todos los extractos, excepto en el extracto con solvente n-hexano. Asimismo, se evidenció la presencia de flavonoides (+++) y alcaloides (+++) en el extracto acidulado. Igualmente, se comprobó la existencia carbohidratos en todos los extractos excepto en el extracto con n-Hexano. No se detectaron aminoácidos ni lípidos. Conclusiones: las hojas de B. latifolia contienen abundantes compuestos fenólicos, en los extractos etanólico, clorofórmico y acidulado y se evidenció ausencia de estos en el extracto en n-hexano. Asimismo, se observó alta presencia de alcaloides en el extracto acidulado de B. latifolia. Los extractos de las hojas de B. latifolia no presentan aminoácidos ni lípidos(AU)

Introduction: Baccharis latifolia (R.&P.) Pers. (chilca) is a wild species that grows on riverbanks. The species is abundant in Peru, where it grows between 1 000 and 4 000 m. It is a shrubby dioicous plant 1 to 2 m in height. The stem is cylindrical and longitudinally striated; the leaves are simple, alternate and petiolated, with ovate-lanceolate blades; capitula in corymbous tips and cylindrical achenes. Objective: Identify secondary metabolites of medicinal interest in leaves of B. latifolia. Methods: Collection of the botanical material was based on the Cerrate and Ramagosa et al methods. Phytochemical screening followed Olga Lock's method. For colorimetry, presence of the metabolite was qualitatively classed as "+++" (abundant), "++" (moderate), "+" (mild) or "-" (absent). Presence of the following metabolites was evaluated: alkaloids, phenols, flavonoids, carbohydrates, amino acids and lipids. Results: Phenols were found to be abundant (+++) in all extracts, except for the extract with n-hexane solvent. Flavonoids (+++) and alkaloids (+++) were present in the acidulated extract. Carbohydrates were found in all extracts except for the extract with n-hexane. Amino acids and lipids were not found. Conclusions: Leaves of B. latifolia contain abundant phenolic compounds in the ethanolic, chloroformic and acidulated extracts, but they are absent in the n-hexane extract. Alkaloids were abundant in the acidulated extract of B. latifolia. Extracts of leaves of B. latifolia do not contain amino acids or lipids(AU)

Consumo de plantas medicinales en usuarios del 'Centro Integral del Adulto Mayor' de la Punta-Callao (Perú) / Consumo de plantas medicinais pelos utentes do 'Centro Integral del Adulto Mayor' de La Punta-Callao (Perú) / Medicinal plant consumption by users of 'Centro Integral del Adulto Mayor' of La Punta-Callao (Peru)

El uso de plantas medicinales ha aumentado durante los últimos años, siendo la población de adultos mayores un importante sector que ha incrementado su consumo. Nuestro objetivo fue conocer el consumo de plantas medicinales en una población de adultos mayores del distrito de la Punta-Callao (Perú). Se realizó una encuesta ad—hoc, semiestructurada y validada en 70 individuos voluntarios. Los resultados reflejan que el 92,9% de los encuestados consumió plantas medicinales. Fueron reportados 50 tipos de plantas medicinales, entre ellos: anís verde (16,6%), manzanilla (16,3%), maíz morado (15%), sábila (6,1%), maca (5,6%), llantén (5%), menta (3,6%), eucalipto (3,6%), linaza (2,8%) y yacón (2,2%). Se obtuvieron datos en relación a la forma de consumo, lugar de compra, frecuencia de uso durante la semana y motivo de uso por cada planta medicinal reportada. Además se observé que un 32,9% de los adultos mayores consume más de 3 fármacos y un 35,9 tiene múltiples patologías (AU)

O consumo de plantas medicinais aumentou durante os últimos anos, sendo a populaçáo idosa um dos sectores em que tal aumento é visível. O objectivo deste trabalho foi o de caracterizar o consumo de plantas medicinais numa populaçáo de idosos do distrito de Punta-Callao (Perú). Realizou-se um inquérito ad hoc, semi-estruturado e validado em 70 individuos voluntários. Os resultados mostram que 92,9% dos entrevistados utilizaram plantas medicinais. Foram identificados 50 tipos de plantas medicinais: anis (16,6%), camomila (16,3%), milho púrpura (15%), aloe (6,1%), maca (5,6%), tanchagem (5%), hortelá-pimenta (3,6%), eucalipto (3,6%), linhaga (2,8%) e yacón (2,2%). Também se obtiveram dados relativos a forma de consumo, lugar de compra, frequóncia de uso durante a semana e motivo de uso por cada planta medicinal relatada. De salientar, ainda, que 32,9% dos idosos consomem mais de 3 fármacos e 35,9 tem múltiplas patologías (AU)

The consumption of medicinal herbs have increase during the last years, being the elderly population an important group who have also increase the consumption. The objective was known the consumption of medicinal herbs of an elderly population from the Punta district, Callao (Peru). An ad-hoc, semi-structured and validated survey was conducted in 70 elderly volunteers. The results reflect that 92.9% of the sample consumed medicinal plants. Fifty types of medicinal plants were reported as: aniseed (16.6%), chamomile (16.3%), purple maize (15%), aloe (61%), maca (56%), llanten (5%), peppermint (36%), eucalyptus (36%), linseed (28%) and yacon (22%). We obtained data on the form of consumption, place of purchase, frequency of use per week and reason for use, for each medicinal herb reported. In addition, 32.9% of the elderly consume more than 3 drugs and 35.9 have multiple pathologies (AU)