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Lead exposure is a severe public health issue that can adversely affect children's neurocognitive development. A semi-urban community in Mexico has been exposed to lead from food cooked in glazed clay pots. A cognitive intervention was conducted from 2015 to 2016 to minimize this negative impact. This intervention aimed to improve the neurocognitive development of the affected children. METHODS: A quasi-experimental study with a control group was conducted in children aged 7 to 12 years from 2 communities in Morelos, Mexico. Blood lead levels were determined, and the neurocognitive function was assessed pre- and postintervention with the Wechsler Intelligence Scale for Children and Children's Auditory Verbal Learning Test-2. A cognitive intervention was conducted at the school. The difference-in-differences method adjusted for variables known as priori and evaluated the impact of cognitive intervention. RESULTS: The differences-in-differences models indicated a significant average increase in scores on the Verbal Comprehension Index (9.58 points), Processing Speed Index (5.33 points), intelligence quotient (5.63 points) level of learning (7.66 points), interference trial (10.12 points), immediate memory span (7.98 points), and recognition accuracy (1.18 points) subtests after the cognitive intervention. CONCLUSION: The results suggest that cognitive intervention improves neurocognitive development in schoolchildren exposed to Pb.
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Doubled haploid (DH) technology has become integral to maize breeding programs to expedite inbred line development and increase the efficiency of breeding operations. Unlike many other plant species that use in vitro methods, DH production in maize uses a relatively simple and efficient in vivo haploid induction method. However, it takes two complete crop cycles for DH line generation, one for haploid induction and the other one for chromosome doubling and seed production. Rescuing in vivo induced haploid embryos has the potential to reduce the time for DH line development and improve the efficiency of DH line production. However, the identification of a few haploid embryos (~10%) resulting from an induction cross from the rest of the diploid embryos is a challenge. In this study, we demonstrated that an anthocyanin marker, namely R1-nj, which is integrated into most haploid inducers, can aid in distinguishing haploid and diploid embryos. Further, we tested conditions that enhance R1-nj anthocyanin marker expression in embryos and found that light and sucrose enhance anthocyanin expression, while phosphorous deprivation in the media had no affect. Validating the use of the R1-nj marker for haploid and diploid embryo identification using a gold standard classification based on visual differences among haploids and diploids for characteristics such as seedling vigor, erectness of leaves, tassel fertility, etc., indicated that the R1-nj marker could lead to significantly high false positives, necessitating the use of additional markers for increased accuracy and reliability of haploid embryo identification.
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Resumen Las lesiones del psoas ilíaco generan alteraciones metabólicas y modificaciones mecánicas clínicamente relacionadas con dolor, disminución de la flexibilidad, restricción del rango óptimo de movimiento y marcha. El objetivo es presentar la efectividad de los estiramientos con diferentes técnicas sobre la movilidad de cadera, la flexibilidad del músculo iliopsoas y los parámetros biomecánicos de la marcha en niños con déficit de extensión de cadera. Se evaluaron e intervinieron cuatro pacientes: dos del género masculino y dos del femenino, de los 6 a los 11 años, en el Centro de Rehabilitación Infantil de la SEDENA. La valoración fue con análisis de la marcha y del movimiento, posteriormente se les brindó un protocolo de estiramientos por 10 sesiones. Todos los participantes mostraron resultados significativos en los parámetros temporoespaciales de la marcha, demostrando una mayor calidad en la biomecánica de la marcha.
Abstract The lesions of the iliopsoas generate metabolic alterations and mechanical modifications, clinically related to pain, decreased flexibility, restriction of the optimal range of movement and gait. The objective is to present the effectiveness of stretching with different techniques on hip mobility, iliopsoas flexibility and biomechanical gait parameters in children with hip extension deficit. Four patients were evaluated and intervened, two of the male gender and two of the female gender, from 6 to 11 years old, at the Centro de Rehabilitación Infantil of the SEDENA. The assessment was with analysis of gait and movement, then they were given a stretching protocol for 10 sessions. All participants showed significant results in the time-space parameters of gait, demonstrating a higher quality in gait biomechanics.
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The protease catalytic subunit of the nuclear inclusion protein A from tobacco etch virus (TEVp) is widely used to remove tags and fusion proteins from recombinant proteins. Some intrinsic drawbacks to its recombinant production have been studied for many years, such as low solubility, auto-proteolysis, and instability. Some point mutations have been incorporated in the amino acid protease sequence to improve its production. Here, a comprehensive review of each mutation reported so far has been made to incorporate them into a mutant called TEVp7M with a total of seven changes. This mutant with a His7tag at N-terminus was produced with remarkable purification yields (55 mg/L of culture) from the soluble fraction in a single step affinity purification. The stability of His7-TEVp7M was analyzed and compared with the single mutant TEVp S219V, making evident that His7-TEVp7M shows very constant thermal stability against pH variation, whereas TEVp S219V is highly sensitive to this change. The cleavage reaction was optimized by determining the amount of protease that could cleave a 100-fold excess substrate in the shortest possible time at 30 °C. Under these conditions, His7-TEVp7M was able to cleave His-tag in the buffers commonly used for affinity purification. Finally, a structural analysis of the mutations showed that four of them increased the polarity of the residues involved and, consequently, showed increased solubility of TEVp and fewer hydrophobic regions exposed to the solvent. Taken together, the seven changes studied in this work improved stability, solubility, and activity of TEVp producing enough protease to digest large amounts of tags or fusion proteins. KEY POINTS: ⢠Production of excellent yields of a TEVp (TEVp7M) by incorporation of seven changes. ⢠His-tag removal in an excess substrate in the common buffers used for purification. ⢠Incorporated mutations improve polarity, stability, and activity of TEVp7M.
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Endopeptidases , Cromatografia de Afinidade , Endopeptidases/genética , Endopeptidases/metabolismo , Proteólise , Proteínas Recombinantes de Fusão/metabolismoRESUMO
Introducción: Las fracturas diafisarias de la tibia tienen una alta incidencia por año, incluidas las del tercio distal. Son las más frecuentes de los huesos largos y se observan sobre todo en adultos jóvenes. Se producen, generalmente, por traumatismos de alta energía como accidentes del tránsito y caídas de alturas. Objetivo: Presentar los resultados del tratamiento realizado a un paciente con fractura extrarticular del tercio distal de la tibia, mediante una técnica de osteosíntesis percutánea mínimamente invasiva. Presentación del caso: Paciente de 45 años, masculino, de piel blanca que sufrió accidente del tránsito, y fue atendido en el servicio de Ortopedia y Traumatología del Hospital General Docente Dr. Antonio Luaces Iraola, con trauma en pierna izquierda. Presentó dolor, inflamación e imposibilidad para caminar. A la exploración física se constató dolor, deformidad, crepitación, movilidad anormal, aumento de volumen e impotencia funcional absoluta. Se realizó radiografía, se corroboró diagnóstico y se decidió tratamiento quirúrgico con técnica mínima invasiva percutánea. Se siguieron los principios de la osteosíntesis biológica y se utilizó placa de segunda generación del sistema AO. Conclusiones: El tiempo quirúrgico fue de 45 minutos, la estadía hospitalaria fue de 48 horas. Se comenzó apoyo parcial a las ocho semanas, y total a las 15 semanas. Se logró la consolidación total de la fractura a las 16 semanas de operado, evaluado de excelente a través de la American Orthopaedic Foot and Ankle Society (AOFAS) score(AU)
Introduction: Diaphyseal fractures of the tibia have high incidence per year, including those of the distal third. They are the most common of the long bones and are seen mostly in young adults. They are generally caused by high-energy trauma such as traffic accidents and falls from heights. Objective: To present the results of the treatment on a patient with extra-articular fracture of the distal third of the tibia, using minimally invasive percutaneous osteosynthesis technique. Case report: A white 45-year-old male patient was injured in a traffic accident, and he was treated in the Orthopedics and Traumatology service at Dr. Antonio Luaces Iraola General Teaching Hospital, because of a trauma to his left leg. He had pain, swelling and inability to walk. Physical examination revealed pain, deformity, crepitus, abnormal mobility, increased volume, and absolute functional impotence. X-rays were performed. The diagnosis was confirmed, and surgical treatment was decided with a minimally invasive percutaneous technique. The principles of biological osteosynthesis were followed and a second generation plate of AO system was used. Conclusions: The surgical time was 45 minutes. The hospital stay was 48 hours. Partial support of the leg was started at eight weeks, and full support at 15 weeks. Full fracture healing was achieved 16 weeks after surgery, the procedure was evaluated as excellent according to the American Orthopedic Foot and Ankle Society (AOFAS) score(AU)
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Humanos , Masculino , Pessoa de Meia-Idade , Fraturas da Tíbia/diagnóstico por imagemRESUMO
RESUMEN Introducción: Diferentes estudios relacionan el diagnóstico del ultrasonido de alta resolución con el diagnóstico artroscópico del manguito rotador, ambos métodos son favorables y muestran una alta sensibilidad y especificidad al compararlos. Objetivo: Establecer la eficacia diagnóstica entre los hallazgos ecográficos de alta resolución y el diagnóstico artroscópico de rupturas parciales y completas del manguito rotador. Métodos: Se realizó un estudio analítico transversal con el objetivo de evaluar la eficacia diagnóstica del ultrasonido de alta resolución en pacientes del Hospital Provincial General Docente Dr. Antonio Luaces Iraola, de Ciego de Ávila, con diagnóstico clínico de rupturas parciales y completas del manguito rotador, de enero del 2016 a enero del 2019. El universo estuvo constituido por 62 pacientes con diagnóstico clínico de ruptura del manguito rotador que presentaban indicaciones quirúrgicas, a los que se les indicó un estudio imagenológico con ultrasonido de alta resolución y, con posterioridad, se les realizó la intervención quirúrgica por artroscopia, que fue tomada como criterio de verdad. Resultados: Predominó el sexo masculino, con una edad media menor que los del sexo femenino. Los hallazgos diagnósticos por ambos métodos mostraron concordancia en más de dos tercios de los pacientes que presentaron rupturas parciales y completas del espesor del manguito rotador. La ultrasonografía según el método empleado resultó un medio diagnóstico eficaz para las rupturas parciales y completas del espesor del manguito rotador. Conclusiones: El ultrasonido de alta resolución presentó una adecuada correlación en el diagnóstico de lesiones parciales o completas del manguito rotador, confirmada por artroscopia y es considerado un medio diagnóstico eficaz(AU)
ABSTRACT Introduction: Different studies relate the diagnosis of high-resolution ultrasound with the arthroscopic diagnosis of the rotator cuff. Both methods are favorable and show high sensitivity and specificity when they are compared. Objective: To establish diagnostic efficacy between the findings of high-resolution ultrasound and the arthroscopic diagnosis of partial and complete ruptures of the rotator cuff. Methods: A cross-sectional analytical study was carried out, aimed at evaluating the diagnostic efficacy of high-resolution ultrasound in patients of Dr. Antonio Luaces Iraola Provincial General Teaching Hospital, in Ciego de Ávila, with a clinical diagnosis of partial and complete ruptures of the rotator cuff, from January 2016 to January 2019. The universe consisted of 62 patients with a clinical diagnosis of rotator cuff rupture who presented surgical indications, and who were also indicated for an imaging study with high-resolution ultrasound and, subsequently, performed arthroscopic surgery, taken as a criterion of truth. Results: The male sex predominated, with an average age lower than those corresponding to female sex. The diagnostic findings by both methods showed agreement in more than two thirds of the patients who presented partial and complete ruptures of the rotator cuff's thickness. Ultrasonography, according to the method used, was an effective diagnostic tool for partial and complete ruptures of the rotator cuff's thickness. Conclusions: High-resolution ultrasound showed an adequate correlation in the diagnosis of partial or complete ruptures of rotator cuff, as confirmed by arthroscopy. It is considered an effective diagnostic means(AU)
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Humanos , Masculino , Feminino , Artroscopia/métodos , Ultrassom/métodos , Lesões do Manguito Rotador/cirurgia , Lesões do Manguito Rotador/diagnóstico por imagem , Estudos TransversaisRESUMO
Therapeutic strategies for the treatment of any severe disease are based on the discovery and validation of druggable targets. The human genome encodes only 600-1500 targets for small-molecule drugs, but posttranslational modifications lead to a considerably larger druggable proteome. The spontaneous conversion of asparagine (Asn) residues to aspartic acid or isoaspartic acid is a frequent modification in proteins as part of the process called deamidation. Triosephosphate isomerase (TIM) is a glycolytic enzyme whose deamidation has been thoroughly studied, but the prospects of exploiting this phenomenon for drug design remain poorly understood. The purpose of this study is to demonstrate the properties of deamidated human TIM (HsTIM) as a selective molecular target. Using in silico prediction, in vitro analyses, and a bacterial model lacking the tim gene, this study analyzed the structural and functional differences between deamidated and nondeamidated HsTIM, which account for the efficacy of this protein as a druggable target. The highly increased permeability and loss of noncovalent interactions of deamidated TIM were found to play a central role in the process of selective enzyme inactivation and methylglyoxal production. This study elucidates the properties of deamidated HsTIM regarding its selective inhibition by thiol-reactive drugs and how these drugs can contribute to the development of cell-specific therapeutic strategies for a variety of diseases, such as COVID-19 and cancer.
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Infecções por Coronavirus/tratamento farmacológico , Inibidores Enzimáticos/farmacologia , Neoplasias/tratamento farmacológico , Pneumonia Viral/tratamento farmacológico , Bibliotecas de Moléculas Pequenas/farmacologia , Triose-Fosfato Isomerase/antagonistas & inibidores , Amidas/antagonistas & inibidores , Amidas/metabolismo , COVID-19 , Cristalografia por Raios X , Inibidores Enzimáticos/química , Humanos , Modelos Moleculares , Mutação , Pandemias , Proteoma/antagonistas & inibidores , Proteoma/genética , Proteoma/metabolismo , Proteínas Recombinantes/química , Proteínas Recombinantes/isolamento & purificação , Proteínas Recombinantes/metabolismo , Bibliotecas de Moléculas Pequenas/química , Triose-Fosfato Isomerase/química , Triose-Fosfato Isomerase/metabolismoRESUMO
Research on Giardia lamblia has accumulated large information about its molecular cell biology and infection biology. However, giardiasis is still one of the commonest parasitic diarrheal diseases affecting humans. Additionally, an alarming increase in cases refractory to conventional treatment has been reported in low prevalence settings. Consequently, efforts directed toward supporting the efficient use of alternative drugs, and the study of their molecular targets appears promising. Repurposing of proton pump inhibitors is effective in vitro against the parasite and the toxic activity is associated with the inhibition of the G. lamblia triosephosphate isomerase (GlTIM) via the formation of covalent adducts with cysteine residue at position 222. Herein, we evaluate the effectiveness of omeprazole in vitro and in situ on GlTIM mutants lacking the most superficial cysteines. We studied the influence on the glycolysis of Giardia trophozoites treated with omeprazole and characterized, for the first time, the morphological effect caused by this drug on the parasite. Our results support the effectiveness of omeprazole against GlTIM despite of the possibility to mutate the druggable amino acid targets as an adaptive response. Also, we further characterized the effect of omeprazole on trophozoites and discuss the possible mechanism involved in its antigiardial effect.
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Antiprotozoários/farmacologia , Giardia lamblia/efeitos dos fármacos , Omeprazol/farmacologia , Animais , Inibidores Enzimáticos/farmacologia , Estabilidade Enzimática , Giardia lamblia/ultraestrutura , Produtos Finais de Glicação Avançada/metabolismo , Humanos , Concentração Inibidora 50 , Cinética , Aldeído Pirúvico/metabolismo , Temperatura , Triose-Fosfato Isomerase/antagonistas & inibidores , Triose-Fosfato Isomerase/metabolismoRESUMO
The effects caused by exposure to lead (Pb) are still considered as a relevant health risk despite public policies aimed to restricting the use of this element. The toxicity limit in the blood (10 µg/dL, established by the Center for Disease Control and Prevention) has been insufficient to prevent adverse effects and even lower values have been related to neurobehavioral dysfunctions in children. Currently, there is not a safe limit of exposure to Pb. A large body of evidence points to environmental pollutant exposure as the cause of predisposition to violent behavior, among others. Considering the evidence by our group and others, we propose that Pb exposure induces alterations in the brain vasculature, specifically in nitric oxide synthases (NOS), affecting in turn the serotonergic system and leading to heightened aggressive behavior in the exposed individuals. This review article describes the consequences of Pb exposure on the nitrergic and serotonergic systems as well as its relationship with aggressive behavior. In addition, it summarizes the available therapy to prevent damage in gestation and among infants.
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Obesity and type II diabetes mellitus have contributed to the increase of breast cancer incidence worldwide. High glucose concentration promotes the proliferation of metastatic cells, favoring the activation of the plasminogen/plasmin system, thus contributing to tumor progression. The efficient formation of plasmin is dependent on the binding of plasminogen to the cell surface. We studied the effect of ε-aminocaproic acid (EACA), an inhibitor of the binding of plasminogen to cell surface, on proliferation, migration, invasion, epithelial-mesenchymal transition (EMT), and plasminogen activation system, in metastatic MDA-MB-231 breast cancer cells grown in a high glucose microenvironment and treated with insulin. MDA-MB-231 cells were treated with EACA 12.5 mmol/L under high glucose 30 mmol/L (HG) and high glucose and insulin 80 nmol/L (HG-I) conditions, evaluating: cell population growth, % of viability, migratory, and invasive abilities, as well as the expression of uPA, its receptor (uPAR), and its inhibitor (PAI-1), by real-time reverse transcription-polymerase chain reaction (RT-PCR) and Western blot, MMP-2 and MMP-9 mRNAs were evaluated by RT-PCR. Markers of EMT were evaluated by Western blot. Additionally, the presence of active uPA was studied by gel zymography, using casein-plasminogen as substrates. EACA prevented the increase in cell population, migration and invasion induced by HG and insulin, which was associated with the inhibition of EMT and the attenuation of HG- and insulin-dependent expression of uPA, uPAR, PAI-1, MMP-2, MMP-9, α-enolase (ENO A), and HCAM. The interaction of plasminogen to the cell surface and plasmin formation are mediators of the prometastasic action of hyperglycemia and insulin, potentially, EACA can be employed in the prevention and as adjuvant treatment of breast tumorigenesis promoted by hyperglycemia and insulin.
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Ácido Aminocaproico/farmacologia , Neoplasias da Mama/metabolismo , Glucose/farmacologia , Insulina/farmacologia , Proteínas de Neoplasias , Plasminogênio , Neoplasias da Mama/patologia , Linhagem Celular Tumoral , Transição Epitelial-Mesenquimal/efeitos dos fármacos , Feminino , Humanos , Invasividade Neoplásica , Proteínas de Neoplasias/antagonistas & inibidores , Proteínas de Neoplasias/metabolismo , Plasminogênio/antagonistas & inibidores , Plasminogênio/metabolismoRESUMO
OBJECTIVES: Lead exposure remains a significant environmental problem; lead is neurotoxic, especially in developing humans. In Mexico, lead in human blood is still a concern. Historically, much of the lead exposure is attributed to the use of handcrafted clay pottery for cooking, storing and serving food. However, experimental cause-and-effect demonstration is lacking. The present study explores this issue with a prospective experimental approach. METHODS: We used handcrafted clay containers to prepare and store lemonade, which was supplied as drinking water to pregnant rats throughout the gestational period. RESULTS AND DISCUSSION: We found that clay pots, jars, and mugs leached on average 200â µg/l lead, and exposure to the lemonade resulted in 2.5â µg/dl of lead in the pregnant rats' blood. Neonates also showed increased lead content in the hippocampus and cerebellum. Caspase-3 activity was found to be statistically increased in the hippocampus in prenatally exposed neonates, suggesting increased apoptosis in that brain region. Glazed ceramics are still an important source of lead exposure in Mexico, and our results confirm that pregnancy is a vulnerable period for brain development.
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Silicatos de Alumínio/química , Utensílios de Alimentação e Culinária , Exposição Dietética/efeitos adversos , Contaminação de Alimentos , Armazenamento de Alimentos/instrumentação , Intoxicação do Sistema Nervoso por Chumbo/etiologia , Chumbo/toxicidade , Animais , Animais Recém-Nascidos , Comportamento Animal/efeitos dos fármacos , Cerebelo/efeitos dos fármacos , Cerebelo/metabolismo , Citrus/química , Argila , Feminino , Sucos de Frutas e Vegetais/efeitos adversos , Hipocampo/efeitos dos fármacos , Hipocampo/metabolismo , Humanos , Chumbo/sangue , Chumbo/metabolismo , Intoxicação do Sistema Nervoso por Chumbo/sangue , Masculino , Exposição Materna/efeitos adversos , México , Gravidez , Distribuição Aleatória , Ratos Wistar , Distribuição Tecidual , ToxicocinéticaRESUMO
Cedecea represents a genus in the Enterobacteriaceae family that has been rarely associated with human infection. The clinical relevance of Cedecea lapagei has yet to be elucidated. This is the first reported case of pneumonia due to C. lapagei in a patient with acute promyelocytic leukemia.
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Adulto , Humanos , Masculino , Infecções por Enterobacteriaceae/microbiologia , Enterobacteriaceae/isolamento & purificação , Pneumonia Bacteriana/microbiologia , Infecções por Enterobacteriaceae/diagnóstico , Infecções por Enterobacteriaceae/epidemiologia , Enterobacteriaceae/classificação , Leucemia Promielocítica Aguda/complicações , México/epidemiologia , Pneumonia Bacteriana/diagnóstico , Pneumonia Bacteriana/epidemiologiaRESUMO
Cedecea represents a genus in the Enterobacteriaceae family that has been rarely associated with human infection. The clinical relevance of Cedecea lapagei has yet to be elucidated. This is the first reported case of pneumonia due to C. lapagei in a patient with acute promyelocytic leukemia.
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Infecções por Enterobacteriaceae/microbiologia , Enterobacteriaceae/isolamento & purificação , Pneumonia Bacteriana/microbiologia , Adulto , Enterobacteriaceae/classificação , Infecções por Enterobacteriaceae/diagnóstico , Infecções por Enterobacteriaceae/epidemiologia , Humanos , Leucemia Promielocítica Aguda/complicações , Masculino , México/epidemiologia , Pneumonia Bacteriana/diagnóstico , Pneumonia Bacteriana/epidemiologiaRESUMO
OBJECTIVE: Capillary blood gas test has had ample use in the infantile population. In the adult population, the information is limited and controversial. The agreement between capillary-arterial gases seems to parallel the pH and the carbon dioxide pressure in different studied populations. In order to know the degree of agreement between these gases, we evaluate them at breathing room air and at 100% of oxygen fractions at 2,240 meters above sea level. METHODS: We obtained capillary-arterial blood gases simultaneously from subjects with stable cardiopulmonary disease in both conditions of inspired oxygen. Demographic, hemodynamic, diagnostic, and laboratory variables were gathered. STATISTICAL ANALYSIS: agreement was analyzed with the intraclass correlation coefficient and the Bland-Altman procedure. RESULTS: We studied 101 subjects, 48 men and 53 women, whose respective ages were 55 +/- 16 and 56 +/- 16. Mean systemic arterial pressure was 94.96 +/- 10.57 mmHg. Hemoglobin was 15.94 +/- 2.48 g/dl. The agreement between the variables with the inspired oxygen fractions, 21%, 100%, and the mean difference in parenthesis was respectively: potential hydrogen, 0.94 (0.0091), 0.94 (0.0039); oxygen pressure, 0.90 (2.94), 0.84 (74.99); carbon dioxide pressure, 0.97 (0.079), 0.97 (0.179); bicarbonate, 0.93 (-0.067), 0,96 (0.262); total dissolved carbon dioxide, 0.94 (-0.142), 0.93 (0.161); base excess: 0.94, (-0.125), 0.92 (0.235); oxygen saturation, 0.98 (0.764), 0.97(0.202). CONCLUSIONS: Capillary blood gas test could be a useful alternative to the arterial one, nevertheless, it is limited by its low agreement with the oxygen pressure in both oxygen inspired fractions.
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Cardiopatias/sangue , Pneumopatias/sangue , Oxigênio/administração & dosagem , Oxigênio/metabolismo , Troca Gasosa Pulmonar , Adulto , Idoso , Idoso de 80 Anos ou mais , Altitude , Gasometria , Capilares , Feminino , Cardiopatias/metabolismo , Humanos , Pneumopatias/metabolismo , Masculino , Pessoa de Meia-Idade , Adulto JovemRESUMO
OBJECTIVE: Capillary blood gas test has had ample use in the infantile population. In the adult population, the information is limited and controversial. The agreement between capillary-arterial gases seems to parallel the pH and the carbon dioxide pressure in different studied populations. In order to know the degree of agreement between these gases, we evaluate them at breathing room air and at 100% of oxygen fractions at 2,240 meters above sea level. METHODS: We obtained capillary-arterial blood gases simultaneously from subjects with stable cardiopulmonary disease in both conditions of inspired oxygen. Demographic, hemodynamic, diagnostic, and laboratory variables were gathered. Statistical analysis: agreement was analyzed with the intraclass correlation coefficient and the Bland-Altman procedure. RESULTS: We studied 101 subjects, 48 men and 53 women, whose respective ages were 55 +/- 16 and 56 +/- 16. Mean systemic arterial pressure was 94.96 +/- 10.57 mmHg. Hemoglobin was 15.94 +/- 2.48 g/dl. The agreement between the variables with the inspired oxygen fractions, 21%, 100%, and the mean difference in parenthesis was respectively: potential hydrogen, 0.94 (0.0091), 0.94 (0.0039); oxygen pressure, 0.90 (2.94), 0.84 (74.99); carbon dioxide pressure, 0.97 (0.079), 0.97 (0.179); bicarbonate, 0.93 (-0.067), 0,96 (0.262); total dissolved carbon dioxide, 0.94 (-0.142), 0.93 (0.161); base excess: 0.94, (-0.125), 0.92 (0.235); oxygen saturation, 0.98 (0.764), 0.97(0.202). CONCLUSIONS: Capillary blood gas test could be a useful alternative to the arterial one, nevertheless, it is limited by its low agreement with the oxygen pressure in both oxygen inspired fractions.