An Integrative Approach to the Current Treatment of HIV-Associated Neurocognitive Disorders and the Implementation of Leukemia Inhibitor Factor as a Mediator of Neurocognitive Preservation.

HIV-associated neurocognitive disorders (HANDs) continue to impact patients despite antiretroviral therapy. A combination of antiretroviral therapies can diminish the HIV viral load to near undetectable levels, but fails to preserve neurocognitive integrity. The cytokine leukemia inhibitory factor (LIF) has shown neuroprotective properties that could mitigate neurodegeneration in HANDs. The LIF promotes neurogenesis, neural cell differentiation, and survival. Combination antiretroviral therapy reduces severe forms of HANDs, but neurocognitive impairment persists; additionally, some antiretrovirals have additional adverse neurotoxic effects. The LIF counteracts neurotoxic viral proteins and limits neural cell damage in models of neuroinflammation. Adding the LIF as an adjuvant therapy to enhance neuroprotection merits further research for managing HANDs. The successful implementation of the LIF to current therapies would contribute to achieving a better quality of life for the affected population.

Delta variant of SARS-CoV-2: characteristics and implications for public health in Colombia / Variante delta del SARS-CoV-2: características e implicaciones para la salud pública en Colombia

Abstract The SARS-CoV-2 Delta variant has become one of the greatest public health challenges worldwide since, after being first identified in India in December 2020, it has spread rapidly, affecting mainly countries with low vaccination rates and those that have relaxed the public health and social measures implemented to control the COVID-19 pandemic. The Delta variant has a higher replication capacity and is associated with viral loads up to 1 260 times higher than those of infections caused by the original strain, which may be associated with an increased likelihood of hospitalization, ICU admission, need for oxygen therapy, pneumonia, or even death. Fully vaccinated individuals have almost similar protection against both Delta and Alpha variants. Given the impact of Delta in countries where it is the dominant variant, it is necessary for all countries to develop systematic action plans focused on implementing strict public health and social measures in the context of the COVID-19 pandemic and on increasing vaccination coverage. Bearing this in mind, the objective of this reflection paper is to describe the main characteristics of the Delta variant, its impact on the dynamics of the pandemic in some of the countries where it has been detected, the effectiveness of vaccines against this variant, and its implications for public health in Colombia.

Resumen La variante delta del SARS-CoV-2 se ha convertido en uno de los mayores desafíos en salud pública a nivel mundial, ya que, luego de su identificación en la India en diciembre de 2020, se ha extendido de manera rápida, afectando principalmente a los países con bajas tasas de vacunación, y aquellos que han flexibilizado las medidas de salud pública establecidas para controlar la pandemia por COVID-19. La variante delta tiene una mayor capacidad de replicación y se asocia con cargas virales hasta 1 260 veces más altas en comparación con las de infecciones causadas por la cepa original, lo cual puede estar asociado a mayores probabilidades de hospitalización, ingreso a UCI, necesidad de oxigenoterapia, neumonía, o incluso muerte. Las personas con vacunación completa tienen una protección casi similar contra las variantes delta y alfa. Dado el impacto de delta en los países afectados en los que es la variante dominante, es necesario que todos los países desarrollen planes de acción sistemáticos enfocados en implementar estrictas medidas de salud pública y sociales en el contexto de la pandemia por COVID-19, y aumentar la cobertura de vacunación. Teniendo en cuenta lo anterior, el objetivo de esta reflexión es describir las principales características de la variante delta, su impacto en la dinámica de la pandemia en algunos de los países en que ha sido detectada, la efectividad de las vacunas contra esta variante, y sus implicaciones para la salud pública en Colombia.

Removal of nutrients from Organic Liquid Agricultural Waste using filamentous algae / Remoção de nutrientes de Resíduos Agrícolas Líquidos Orgânicos utilizando algas filamentosas

Abstract A feasibility analysis of tertiary treatment for Organic Liquid Agricultural Waste is presented using filamentous algae belonging to the genus Cladophora sp. as an alternative to chemical tertiary treatment. The main advantages of tertiary treatments that use biological systems are the low cost investment and the minimal dependence on environmental variables. In this work we demonstrate that filamentous algae reduces the nutrient load of nitrate (circa 75%) and phosphate (circa 86%) from the organic waste effluents coming from dairy farms after nine days of culture, with the added advantage being that after the treatment period, algae removal can be achieved by simple procedures. Currently, the organic wastewater is discarded into fields and local streams. However, the algae can acquire value as a by-product since it has various uses as compost, cellulose, and biogas. A disadvantage of this system is that clean water must be used to achieve enough water transparency to allow algae growth. Even so, the nutrient reduction system of the organic effluents proposed is friendly to the ecosystem, compared to tertiary treatments that use chemicals to precipitate and collect nutrients such as nitrates and phosphates.

Resumo Uma análise de viabilidade do tratamento terciário para Resíduos Agrícola Líquidos Orgânicos é apresentada usando algas filamentosas pertencentes ao gênero Cladophora sp. como alternativa ao tratamento químico terciário. Os tratamentos terciários que utilizam sistemas biológicos têm baixo custo de investimento e a dependência de variáveis ​​ambientais é mínima. Neste trabalho, é demonstrado que essas algas filamentosas reduzem a carga nutricional de nitrato (circa 75%) e fosfato (circa 86%) dos efluentes de resíduos orgânicos provenientes de fazendas de leite em nove dias de cultura e tem a vantagem de que as algas podem ser facilmente coletadas posteriormente. Atualmente, as águas residuais orgânicas são descartadas nos campos e córregos locais. Posteriormente, as algas podem ser consideradas como matéria prima, uma vez que possuem várias utilidades como composto, celulose e biogás. Uma desvantagem desse sistema é que água limpa deve ser usada para obter transparência de água suficiente para permitir o crescimento de algas. Mesmo assim, o sistema de redução de nutrientes dos efluentes orgânicos propostos e amigável ao ecossistema, comparado aos tratamentos terciários que utilizam produtos químicos para precipitar e coletar nutrientes como nitratos e fosfatos.

Impact of transplantation on neutrophil extracellular trap formation in patients with end-stage renal disease: A single-center, prospective cohort study.

ABSTRACT: Increased neutrophil extracellular trap (NET) formation associates with high cardiovascular risk and mortality in patients with end-stage renal disease (ESRD). However, the effect of transplantation on NETs and its associated markers remains unclear. This study aimed to characterize circulating citrullinated Histone H3 (H3cit) and Peptidyl Arginase Deiminase 4 (PAD4) in ESRD patients undergoing transplantation and evaluate the ability of their neutrophils to release NETs.This prospective cohort study included 80 healthy donors and 105 ESRD patients, out of which 95 received a transplant. H3cit and PAD4 circulating concentration was determined by enzyme-linked immunosorbent assay in healthy donors and ESRD patients at the time of enrollment. An additional measurement was carried out within the first 6 months after transplant surgery. In vitro NET formation assays were performed in neutrophils isolated from healthy donors, ESRD patients, and transplant recipients.H3cit and PAD4 levels were significantly higher in ESRD patients (H3cit, 14.38 ng/mL [5.78-27.13]; PAD4, 3.22 ng/mL [1.21-6.82]) than healthy donors (H3cit, 6.45 ng/mL [3.30-11.65], P < .0001; PAD4, 2.0 ng/mL [0.90-3.18], P = .0076). H3cit, but not PAD4, increased after transplantation, with 44.2% of post-transplant patients exhibiting high levels (≥ 27.1 ng/mL). In contrast, NET release triggered by phorbol 12-myristate 13-acetate was higher in neutrophils from ESRD patients (70.0% [52.7-94.6]) than healthy donors (32.2% [24.9-54.9], P < .001) and transplant recipients (19.5% [3.5-65.7], P < .05).The restoration of renal function due to transplantation could not reduce circulating levels of H3cit and PAD4 in ESRD patients. Furthermore, circulating H3cit levels were significantly increased after transplantation. Neutrophils from transplant recipients exhibit a reduced ability to form NETs.

¿Es la atención primaria de salud integral parte de la respuesta a la pandemia de Covid-19 en Latinoamérica? / Is comprehensive primary health care part of the response to the COVID-19 pandemic in Latin America? / A atenção primária à saúde integral é parte da resposta à pandemia de Covid-19 na América Latina?

Resumen América Latina se ha convertido en uno de los epicentros de la pandemia de Covid-19, con una crisis sanitaria y humanitaria. El objetivo del artículo es analizar las medidas para enfrentar la pandemia en países de la Región y el rol de la Atención Primaria de Salud, discutiendo obstáculos y potencialidades. Son analizados los casos de Bolivia, Brasil, Chile, Colombia, Cuba, Uruguay y Venezuela. Los siete países adoptaran medidas de aislamiento social de diferentes alcances, con grados distintos de sostenibilidad. El énfasis de las respuestas estuvo más en la atención hospitalaria que en la vigilancia de la salud, identificación de casos y contactos y disposición de condiciones adecuadas para el confinamiento. En casi todos los países, se subestimó la capacidad de los servicios de atención primária en el territorio. No obstante, iniciativas de enfoque territorial y comunitario buscaron integrar la vigilancia de la salud con actividades de promoción, prevención y cuidado, aunque con alcance parcial. En este contexto la Atención Primaria Integral e integrada toma nuevo sentido y reclama desarrollos que contribuyan a recobrar el equilibrio entre sociedad y medio ambiente. Es necesario repensar los sistemas de salud y la importancia de la atención primaria de salud integrada e integral.

Abstract Latin America has become one of the epicenters of the COVID-19 pandemic, with a health and humanitarian crisis. The objective of the article is to analyze the strategies implemented by countries in the Region to face the pandemic and the role of Primary Health Care, considering obstacles and potential. The cases of Bolivia, Brazil, Chile, Colombia, Cuba, Uruguay and Venezuela were analyzed. The seven countries have adopted diverse social distancing strategies with varying degrees of sustainability. The responses emphasized hospital care more than surveillance, case identification, contact tracking, and enabling adequate conditions for isolation. In almost all cases studied, the capacity of primary care services in the territory was underestimated. Even so, primary care initiatives with a territorial and community focus sought to integrate health surveillance with promotion, prevention and care, despite partial implementation. In this context, comprehensive and integrated primary care takes on new meaning and requires new developments in order to contribute to the recovery of the balance between society and the environment. The pandemic showed the need to rethink health care systems and the importance of primary care for comprehensive and integrated health.

Resumo A América Latina tornou-se um dos epicentros da pandemia de Covid-19, com uma crise sanitária e humanitária. O objetivo do artigo é analisar as estratégias implementadas por países da Região para enfrentar a pandemia e o papel da Atenção Primária à Saúde, ponderando obstáculos e potencialidades. Foram analisados os casos de Bolívia, Brasil, Chile, Colômbia, Cuba, Uruguai e Venezuela. Os sete países adotaram estratégias de distanciamento social diversas com diferentes graus de sustentabilidade. As respostas enfatizaram mais a assistência hospitalar do que a vigilância, a identificação de casos, o rastreamento dos contatos e a viabilização de condições adequadas para isolamento. Em quase todos os casos estudados, foi subestimada a capacidade dos serviços de atenção primária no território. Ainda assim, iniciativas de atenção primária com enfoque territorial e comunitário buscaram integrar a vigilância à saúde com a promoção, prevenção e cuidado, apesar de implantação parcial. Nesse contexto, uma atenção primária integral e integrada adquire novo significado e requisita novos desenvolvimentos de forma a contribuir para a recuperação do equilíbrio entre a sociedade e o meio ambiente. A pandemia mostrou a necessidade de repensar os sistemas de atenção à saúde e a importância da atenção primária à saúde integral e integrada.

Removal of nutrients from Organic Liquid Agricultural Waste using filamentous algae.

A feasibility analysis of tertiary treatment for Organic Liquid Agricultural Waste is presented using filamentous algae belonging to the genus Cladophora sp. as an alternative to chemical tertiary treatment. The main advantages of tertiary treatments that use biological systems are the low cost investment and the minimal dependence on environmental variables. In this work we demonstrate that filamentous algae reduces the nutrient load of nitrate (circa 75%) and phosphate (circa 86%) from the organic waste effluents coming from dairy farms after nine days of culture, with the added advantage being that after the treatment period, algae removal can be achieved by simple procedures. Currently, the organic wastewater is discarded into fields and local streams. However, the algae can acquire value as a by-product since it has various uses as compost, cellulose, and biogas. A disadvantage of this system is that clean water must be used to achieve enough water transparency to allow algae growth. Even so, the nutrient reduction system of the organic effluents proposed is friendly to the ecosystem, compared to tertiary treatments that use chemicals to precipitate and collect nutrients such as nitrates and phosphates.

Clinical Relevant Polymorphisms Affecting Clopidogrel Pharmacokinetics and Pharmacodynamics: Insights from the Puerto Rico Newborn Screening Program.

Background: Variations in several clopidogrel-pharmacogenes have been linked to clopidogrel response variability and clinical outcomes. We aimed to determine the frequency distribution of major polymorphisms on CYP2C19, PON1, ABCB1 and P2RY12 pharmacogenes in Puerto Ricans. Methods: This was a cross-sectional, population-based study of 200 unrelated "Guthrie" cards specimens from newborns registered in the Puerto Rican newborn screening program (PRNSP) between 2004 and 2014. Taqman® SNP assay techniques were used for genotyping. Results: Minor allele frequencies (MAF) were 46% for PON1 (rs662), 41% for ABCB1 (rs1045642), 14% for CYP2C19*17, 13% for CYP2C19*2, 12% for P2RY12-H2 and 0.3% for CYP2C19*4. No carriers of the CYP2C19*3 variants were detected. All alleles and genotype proportions were found to be in Hardy⁻Weinberg equilibrium (HWE). Overall, there were no significant differences between MAFs of these variants in Puerto Ricans and the general population (n = 453) of the 1000 Genome project, except when comparisons to each individual parental group were performed (i.e., Africans, Europeans and East-Asians; p < 0.05). As expected, the prevalence of these markers in Puerto Ricans most resembled those in the 181 subjects from reference populations of the Americas. Conclusions: These prevalence data provide a necessary groundwork for future clinical studies of clopidogrel pharmacogenetics in Caribbean Hispanics.

A reassessment on the state of knowledge of Chilean Falconidae in the last hundred years.

Eight species of falcons (Falconidae) have been recorded in Chile. To date, all relevant studies considered birds of prey in general, with no specific focus on this family. Based on a comprehensive review of the literature, an updated report is presented on the state of knowledge of falcons in Chile. This data set comprises a total of 165 studies published from 1915 to 2015. Scientific productivity was lowest in 1945-1955 and highest in 2005-2015, with a steady increase since 1985. However, the focus of research in Chile is biased towards two species: Milvago chimango and Falco sparverius. Two administrative regions, Santiago Metropolitan Region and Araucanía, were the most studied whereas Arica, Tarapacá, and Antofagasta regions accounted for fewer than 1% of the studies. Faunistic studies (including abundance) were the most common research topic. It is suggested that the lack of knowledge regarding species in the genus Phalcoboenus may negatively affect the conservation status of these species, and believed that the lack of preference for certain research topics, such as systematics and natural history, are the result of historical factors including the decrease of field biology and perhaps a biased interest of the researchers. Finally, this review highlights the paucity of information on falcons and provides a framework for directing future research.

Removal of nutrients from Organic Liquid Agricultural Waste using filamentous algae

Abstract A feasibility analysis of tertiary treatment for Organic Liquid Agricultural Waste is presented using filamentous algae belonging to the genus Cladophora sp. as an alternative to chemical tertiary treatment. The main advantages of tertiary treatments that use biological systems are the low cost investment and the minimal dependence on environmental variables. In this work we demonstrate that filamentous algae reduces the nutrient load of nitrate (circa 75%) and phosphate (circa 86%) from the organic waste effluents coming from dairy farms after nine days of culture, with the added advantage being that after the treatment period, algae removal can be achieved by simple procedures. Currently, the organic wastewater is discarded into fields and local streams. However, the algae can acquire value as a by-product since it has various uses as compost, cellulose, and biogas. A disadvantage of this system is that clean water must be used to achieve enough water transparency to allow algae growth. Even so, the nutrient reduction system of the organic effluents proposed is friendly to the ecosystem, compared to tertiary treatments that use chemicals to precipitate and collect nutrients such as nitrates and phosphates.

Resumo Uma análise de viabilidade do tratamento terciário para Resíduos Agrícola Líquidos Orgânicos é apresentada usando algas filamentosas pertencentes ao gênero Cladophora sp. como alternativa ao tratamento químico terciário. Os tratamentos terciários que utilizam sistemas biológicos têm baixo custo de investimento e a dependência de variáveis ambientais é mínima. Neste trabalho, é demonstrado que essas algas filamentosas reduzem a carga nutricional de nitrato (circa 75%) e fosfato (circa 86%) dos efluentes de resíduos orgânicos provenientes de fazendas de leite em nove dias de cultura e tem a vantagem de que as algas podem ser facilmente coletadas posteriormente. Atualmente, as águas residuais orgânicas são descartadas nos campos e córregos locais. Posteriormente, as algas podem ser consideradas como matéria prima, uma vez que possuem várias utilidades como composto, celulose e biogás. Uma desvantagem desse sistema é que água limpa deve ser usada para obter transparência de água suficiente para permitir o crescimento de algas. Mesmo assim, o sistema de redução de nutrientes dos efluentes orgânicos propostos e amigável ao ecossistema, comparado aos tratamentos terciários que utilizam produtos químicos para precipitar e coletar nutrientes como nitratos e fosfatos.

Challenges of implementing a primary health care strategy in a context of a market-oriented health care system: the experience of Bogota, Colombia.

BACKGROUND: Although Colombia has a health system based on market and neoliberal principles, in 2004, the government of the capital-Bogota-took the decision to formulate a health policy that included the implementation of a comprehensive primary health care (PHC) strategy. This study aims to identify the enablers and barriers to the PHC implementation in Bogota. METHODS: The study used a qualitative multiple case study methodology. Seven Bogota's localities were included. Eighteen semi-structured interviews with key informants (decision-makers at each locality and members of the District Health Secretariat) and fourteen FGDs (one focus group with staff members and one with community members) were carried out. Data were analysed using a thematic analysis approach. RESULTS: The main enablers found across the district and local levels showed a similar pattern, all were related to the good will and commitment of actors at different levels. Barriers included the approach of the national policies and a health system based on neoliberal principles, the lack of a stable funding source, the confusing and rigid guidelines, the high turnover of human resources, the lack of competencies among health workers regarding family focus and community orientation, and the limited involvement of institutions outside the health sector in generating intersectoral responses and promoting community participation. CONCLUSION: Significant efforts are required to overcome the market approach of the national health system. Interventions must be designed to include well-trained and motivated human resources, as well as to establish available and stable financial resources for the PHC strategy.

Performance evaluation of the essential dimensions of the primary health care services in six localities of Bogota-Colombia: a cross-sectional study.

BACKGROUND: The high segmentation and fragmentation in the provision of services are some of the main problems of the Colombian health system. In 2004 the district government of Bogota decided to implement a Primary Health Care (PHC) strategy through the Home Health program. PHC was conceived as a model for transforming health care delivery within the network of the first-level public health care facilities. This study aims to evaluate the performance of the essential dimensions of the PHC strategy in six localities geographically distributed throughout Bogotá city. METHODS: The rapid assessment tool to measure PHC performance, validated in Brazil, was applied. The perception of participants (users, professionals, health managers) in public health facilities where the Home Health program was implemented was compared with the perception of participants in private health facilities not implementing the program. A global performance index and specific indices for each primary care dimension were calculated. A multivariate logistic regression analysis was conducted to determine possible associations between the performance of the PHC dimensions and the self-perceived health status of users. RESULTS: The global performance index was rated as good for all participants interviewed. In general, with the exception of professionals, the differences in most of the essential dimensions seemed to favor public health care facilities where the Home Health program was implemented. The weakest dimensions were the family focus and community orientation--rated as critical by users; the distribution of financial resources--rated as critical by health managers; and, accessibility--rated as intermediate by users. CONCLUSIONS: The overall findings suggest that the Home Health program could be improving the performance of the network of the first-level public health care facilities in some PHC essential dimensions, but significant efforts to achieve its objectives and raise its visibility in the community are required.

The impact of primary healthcare in reducing inequalities in child health outcomes, Bogotá-Colombia: an ecological analysis.

BACKGROUND: Colombia is one of the countries with the widest levels of socioeconomic and health inequalities. Bogotá, its capital, faces serious problems of poverty, social disparities and access to health services. A Primary Health Care (PHC) strategy was implemented in 2004 to improve health care and to address the social determinants of such inequalities. This study aimed to evaluate the contribution of the PHC strategy to reducing inequalities in child health outcomes in Bogotá. METHODS: An ecological analysis with localities as the unit of analysis was carried out. The variable used to capture the socioeconomic status and living standards was the Quality of Life Index (QLI). Concentration curves and concentration indices for four child health outcomes (infant mortality rate (IMR), under-5 mortality rate, prevalence of acute malnutrition in children under-5, and vaccination coverage for diphtheria, pertussis and tetanus) were calculated to measure socioeconomic inequality. Two periods were used to describe possible changes in the magnitude of the inequalities related with the PHC implementation (2003 year before - 2007 year after implementation). The contribution of the PHC intervention was computed by a decomposition analysis carried out on data from 2007. RESULTS: In both 2003 and 2007, concentration curves and indexes of IMR, under-5 mortality rate and acute malnutrition showed inequalities to the disadvantage of localities with lower QLI. Diphtheria, pertussis and tetanus (DPT) vaccinations were more prevalent among localities with higher QLI in 2003 but were higher in localities with lower QLI in 2007. The variation of the concentration index between 2003 and 2007 indicated reductions in inequality for all of the indicators in the period after the PHC implementation. In 2007, PHC was associated with a reduction in the effect of the inequality that affected disadvantaged localities in under-5 mortality (24%), IMR (19%) and acute malnutrition (7%). PHC also contributed approximately 20% to inequality in DPT coverage, favoring the poorer localities. CONCLUSION: The PHC strategy developed in Bogotá appears to be contributing to reductions of the inequality associated with socioeconomic and living conditions in child health outcomes.

Primary health care contribution to improve health outcomes in Bogota-Colombia: a longitudinal ecological analysis.

BACKGROUND: Colombia has a highly segmented and fragmented national health system that contributes to inequitable health outcomes. In 2004 the district government of Bogota initiated a Primary Health Care (PHC) strategy to improve health care access and population health status. This study aims to analyse the contribution of the PHC strategy to the improvement of health outcomes controlling for socioeconomic variables. METHODS: A longitudinal ecological analysis using data from secondary sources was carried out. The analysis used data from 2003 and 2007 (one year before and 3 years after the PHC implementation). A Primary Health Care Index (PHCI) of coverage intensity was constructed. According to the PHCI, localities were classified into two groups: high and low coverage. A multivariate analysis using a Poisson regression model for each year separately and a Panel Poisson regression model to assess changes between the groups over the years was developed. Dependent variables were infant mortality rate, under-5 mortality rate, infant mortality rate due to acute diarrheal disease and pneumonia, prevalence of acute malnutrition, vaccination coverage for diphtheria, pertussis, tetanus (DPT) and prevalence of exclusive breastfeeding. The independent variable was the PHCI. Control variables were sewerage coverage, health system insurance coverage and quality of life index. RESULTS: The high PHCI localities as compared with the low PHCI localities showed significant risk reductions of under-5 mortality (13.8%) and infant mortality due to pneumonia (37.5%) between 2003 and 2007. The probability of being vaccinated for DPT also showed a significant increase of 4.9%. The risk of infant mortality and of acute malnutrition in children under-5 years was lesser in the high coverage group than in the low one; however relative changes were not statistically significant. CONCLUSIONS: Despite the adverse contextual conditions and the limitations imposed by the Colombian health system itself, Bogota's initiative of a PHC strategy has successfully contributed to the improvement of some health outcomes.

Tecnología de la salud basada en evidencias / Technological process of health

En el libro se destacan la integración e interrelación de los factores que constituyen el Sistema Tecnológico de la Salud, sustentado por el principio de la "integración de las ciencias con el objetivo de desarrollar conocimientos y habilidades, hábitos y capacidades para el desempeño de las competencias profesionales". Un factor importante para la eficiencia de los servicios de salud es la correcta organización y ejecución del proceso tecnológico, lo cual se evidencia el la descripciónde la estructura, el funcionamiento de la tecnología propuesta y las orientaciones para obtener los mejores resultados en su aplicación.

Association of the -250G/A promoter polymorphism of the hepatic lipase gene with the risk of peripheral arterial disease in type 2 diabetic patients.

AIM: This study aimed to investigate the association between a polymorphism in the hepatic lipase (LIPC) gene promoter and the presence of peripheral arterial disease (PAD) in persons with type 2 diabetes. PATIENT AND METHODS: We evaluated 120 type 2 diabetics and identified those with PAD according to the ankle-arm index. The G-250A polymorphisms in the promoter of the LIPC gene were studied by PCR restriction. A logistic regression analysis was performed to determine the association between the rare allele and PAD. RESULTS: The prevalence of PAD was 19%. The frequency of the -250A allele was 0.211 in the group without PAD and 0.395 in the group with PAD (P<.05). Carriers of the -250A allele differed only in the ankle-arm index (0.92+/-0.12 for carriers vs. 1.00+/-0.12 for noncarriers, P<.05), with the difference remaining significant after adjustment for covariates (age; sex; waist-to-hip ratio; body mass index; duration of diabetes; smoking; hypertension; glycated hemoglobin; triglycerides; HDL cholesterol; LDL cholesterol; small, dense LDL cholesterol). Only smoking [odds ratio (OR)=6.93, 95% confidence interval (CI)=2.12-22.69, P=.001] and the -250A allele (OR=2.89, 95% CI=1.07-7.84, P=.036) were significantly associated with vascular disease in the logistic regression analysis. CONCLUSIONS: Patients with type 2 diabetes who are carriers of the rare -250A allele in the promoter of the hepatic lipase gene are susceptible to PAD.

Polimorfismo ­-250G/A de LIPC y su asociación con la enfermedad arterial periférica en pacientes con diabetes tipo 2 / –250G/A LIPC polymorphism and its relationship with peripheral artery disease

Introducción. La enfermedad arterial periférica (EAP) puede considerarse un predictor de mortalidad cardiovascular. Como otras enfermedades provocadas por la arteriosclerosis aparece como consecuencia de la interacción entre numerosos factores ambientales y genéticos. A pesar del impacto en la salud y la prevalencia de la EAP, especialmente elevada en diabéticos, se conoce poco acerca de las variantes genéticas que confieren susceptibilidad a esta enfermedad. Objetivo. Estudiar la asociación entre el polimorfismo ­250G/A del promotor del gen de lipasa hepática (LIPC) y la presencia de enfermedad arterial periférica en individuos con diabetes tipo 2. Pacientes y métodos. Se han estudiado 78 personas sin diabetes ni EAP y 138 pacientes diabéticos tipo 2 en los que se ha diagnosticado la presencia de EAP mediante el índice tobillo-brazo. El polimorfismo ­250G/A se ha analizado mediante PCR y restricción. Para demostrar la asociación entre la presencia del alelo ­250A y la EAP se ha realizado un análisis de regresión logística. Resultados. Según el análisis de regresión logística por pasos hacia delante, la presencia del alelo ­250A (odds ratio: 2,80; intervalo de confianza del 95%, 1,06-7,40; p < 0,05) se asocia independientemente con la EAP, incluyendo las variables edad, sexo, hipertensión, hábito de fumar, tiempo de diagnóstico de la diabetes, hemoglobina glucosilada (HbA1c), índice de masa corporal, triglicéridos, colesterol unido a lipoproteínas de alta densidad y colesterol unido a lipoproteínas de baja densidad en el modelo. La prevalencia de EAP en los portadores del alelo fue del 31,3% y sólo del 13,3% en no portadores (p < 0,05). Conclusión. Nuestro estudio muestra que el alelo menos frecuente del polimorfismo ­250G/A del promotor de LIPC se asocia independientemente con la presencia de EAP en pacientes diabéticos tipo 2 (AU)

Introduction. Peripheral arterial disease (PAD) is considered a significant predictor of cardiovascular mortality. Similar to other atherosclerotic diseases, PAD appears as consequence of the interaction between multiple environmental and genetic factors. Despite its health impact and its prevalence, especially high in diabetic patients, the genetic factors underlying susceptibility to PAD are not well known. Objective. To investigate the association between the ­250G/A promoter polymorphism in the hepatic lipase (LIPC) gene and the presence of peripheral arterial disease in persons with type 2 diabetes. Patients and methods. We evaluated 78 subjects without diabetes nor PAD and 138 type 2 diabetics and identified those with peripheral arterial disease according to the ankle-arm index. The ­250G/A polymorphism in the promoter of the LIPC gene was studied by PCR-restriction. A logistic regression analysis was performed to determine the association between the rare allele and peripheral arterial disease. Results. The ­250A allele (OR 2.80; 95% CI: 1.06-7.40; p < 0.05) was significantly associated with PAD in the logistic regression analysis including age, sex, waist-to-hip ratio, body-mass index, duration of diabetes, hypertension, smoking, glycated hemoglobin, triglycerides, HDL-C and LDL-C in the model. Prevalence of PAD in diabetics patientes carriers of the ­250A allele was 31.3% but only 13.3% in non carriers (p < 0.05). Conclusions. Patients with type 2 diabetes who are carriers of the less frequent ­250A allele in the promoter of the hepatic lipase gene are susceptible to peripheral arterial disease (AU)