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1.
J Antimicrob Chemother ; 78(10): 2559-2562, 2023 10 03.
Artículo en Inglés | MEDLINE | ID: mdl-37667501

RESUMEN

OBJECTIVES: Because tacrolimus has a narrow therapeutic window and exhibits both intraindividual and interindividual variability, we attempted to establish the percentage of calcineurin inhibitor (CNI) dose reduction to prevent toxicity and ensure stem cell engraftment when using this immunosuppressant with the antifungal isavuconazole (ISA). By calculating the tacrolimus concentration/dose (C/D) ratio, we expected to demonstrate the magnitude of change in the C/D ratio from baseline after ISA administration. METHODS: We evaluated the interaction between ISA, a new triazole antifungal used in prophylaxis for invasive fungal infections, and the CNI class of immunosuppressive drugs, specifically tacrolimus, in 11 blood samples from HSCT recipients. RESULTS: The mean tacrolimus C/D ratio increased 1.44-fold from baseline 48 h after ISA administration (P = 0.001). CONCLUSIONS: Although further investigation is needed, the results of this study suggest that a reduction of 18% in tacrolimus may be recommended.


Asunto(s)
Trasplante de Células Madre Hematopoyéticas , Tacrolimus , Humanos , Tacrolimus/uso terapéutico , Tacrolimus/farmacología , Antifúngicos/uso terapéutico , Antifúngicos/farmacología , Triazoles/farmacología , Inmunosupresores/efectos adversos , Trasplante de Células Madre Hematopoyéticas/efectos adversos , Interacciones Farmacológicas
2.
J Radiol Prot ; 42(3)2022 09 15.
Artículo en Inglés | MEDLINE | ID: mdl-35940166

RESUMEN

The goal of the present study was to propose a set of preliminary regional diagnostic reference levels (DRLs) for pediatric interventional cardiology (IC) procedures in Latin America and the Caribbean countries, classified by age and weight groups. The study was conducted in the framework of the Optimization of Protection in Pediatric Interventional Radiology in Latin America and the Caribbean program coordinated by the World Health Organization and the Pan American Health Organization in cooperation with the International Atomic Energy Agency. The first step of the program was focused on pediatric IC. Dose data from diagnostic and therapeutic procedures were collected between December 2020 and December 2021. Regional DRLs were set as the third quartile of patient dose data (kerma area product) collected in 18 hospitals from 10 countries in an initial sample of 968 procedures. DRLs were set for four age bands and five weight ranges. The values obtained for the four age bands (<1 yr, 1 to <5 yr, 5 to <10 yr and 10 to <16 yr) were 2.9, 6.1, 8.8 and 14.4 Gy cm2for diagnostic procedures, and 4.0, 5.0, 10.0 and 38.1 Gy cm2for therapeutic procedures, respectively. The values obtained for the five weight bands (<5 kg, 5 to <15 kg, 15 to <30 kg, 30 to <50 kg and 50 to <80 kg) were 3.0, 4.5, 8.1, 9.2 and 26.8 Gy cm2for diagnostic procedures and 3.7, 4,3, 7.3, 16.1 and 53.4 Gy cm2for therapeutic procedures, respectively. While initial data were collected manually as patient dose management systems (DMSs) were not available in most of the hospitals involved in the program, a centralized automatic DMS for the collection and management of patient dose indicators has now been introduced and is envisaged to increase the sample size. The possibility of alerting on high dose values and introducing corrective actions will help in optimization.


Asunto(s)
Cardiología , Niveles de Referencia para Diagnóstico , Cardiología/métodos , Niño , Fluoroscopía , Humanos , América Latina , Dosis de Radiación , Radiografía Intervencional/métodos , Radiología Intervencionista , Valores de Referencia
3.
Neurologia ; 32(9): 559-567, 2017.
Artículo en Inglés, Español | MEDLINE | ID: mdl-27157525

RESUMEN

OBJECTIVES: Stroke is a very common cause of death, especially in southern Spain. The present study analyses in-hospital mortality associated with stroke in an Andalusian tertiary care hospital. METHODS: We gathered the files of all patients who had died at Hospital Universitario Virgen de las Nieves in Granada in 2013 and whose death certificates indicated stroke as the cause of death. We also gathered stroke patients discharge data and compared them to that of patients with acute coronary syndrome (ACS). RESULTS: A total of 825 patients had a diagnosis of stroke (96 deaths, 11.6%); of these, 562 had ischaemic stroke (44 deaths, 7.8%) and 263 haemorrhagic stroke (52 deaths, 19.7%). Patients with haemorrhagic stroke therefore showed greater mortality rate (OR=2.9). Patients in this group died after a shorter time in hospital (median, 4 vs 7 days; mean, 6 days). However, patients with ischaemic stroke were older and presented with more comorbidities. On the other hand, 617 patients had a diagnosis of ACS (36 deaths, 5.8%). The mortality odds ratio (MOR) was 2.1 (stroke/SCA). Around 23% of the patients who died from stroke were taking anticoagulants. 60% of the deceased patients with ischaemic stroke and 20% of those with haemorrhagic stroke had atrial fibrillation (AF); 35% of the patients with ischaemic stroke and AF were taking anticoagulants. CONCLUSIONS: Stroke is associated with higher admission and in-hospital mortality rates than SCA. Likewise, patients with haemorrhagic stroke showed higher mortality rates than those with ischaemic stroke. Patients with fatal stroke usually had a history of long-term treatment with anticoagulants; 2 thirds of the patients with fatal ischaemic stroke and atrial fibrillation were not receiving anticoagulants. According to our results, optimising prevention in patients with AF may have a positive impact on stroke-related in-hospital mortality.


Asunto(s)
Mortalidad Hospitalaria , Accidente Cerebrovascular/mortalidad , Centros de Atención Terciaria , Anciano , Anticoagulantes/uso terapéutico , Fibrilación Atrial/complicaciones , Femenino , Humanos , Hemorragias Intracraneales/complicaciones , Masculino , España , Accidente Cerebrovascular/tratamiento farmacológico
4.
Neurologia ; 36(7): 563-564, 2021 Sep.
Artículo en Español | MEDLINE | ID: mdl-34024656
5.
J Dairy Sci ; 98(7): 4328-37, 2015 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-25958286

RESUMEN

Lactoferrin is a protein with important biological functions that can be obtained from milk and by-products derived from the dairy industry, such as whey. Although bovine lactoferrin has been extensively studied, ovine lactoferrin is not quite as well known. In the present study, the effect of several heat treatments in 3 different media, over a temperature range from 66 to 75°C, has been studied on lactoferrin isolated from sheep milk. Denaturation of lactoferrin was determined by measuring its immunoreactivity with specific polyclonal antibodies. Kinetic and thermodynamic parameters obtained indicate that lactoferrin denatures by heat more rapidly in whey than in phosphate buffer or milk. The value of activation energy found for the denaturation process of lactoferrin when treated in whey is higher (390kJ/mol) than that obtained in milk (194kJ/mol) or phosphate buffer (179kJ/mol). This indicates that a great amount of energy is necessary to start denaturation of ovine lactoferrin, probably due to the interaction of this protein with other whey proteins. The changes in the hydrophobicity of lactoferrin after heat treatments were determined by fluorescence measurement using acrylamide. The decrease in the hydrophobicity constant was very small for the treatments from 66 to 75°C, up to 20min, which indicates that lactoferrin conformation did not experienced a great change. The results obtained in this study permit the prediction of behavior of ovine lactoferrin under several heat treatments and show that high-temperature, short-time pasteurization (72°C, 15 s) does not cause loss of its immunoreactivity and, consequently, would not affect its conformation and biological activity.


Asunto(s)
Lactoferrina/química , Leche/química , Desnaturalización Proteica , Animales , Tampones (Química) , Calor , Interacciones Hidrofóbicas e Hidrofílicas , Cinética , Fosfatos/química , Ovinos , Termodinámica , Suero Lácteo/química
6.
Rev Chilena Infectol ; 32(3): 321-5, 2015 Jun.
Artículo en Español | MEDLINE | ID: mdl-26230439

RESUMEN

BACKGROUND: Bone and joint infections (BJI) are relatively common in children, and community -acquired methicillin resistant Staphylococcus aureus (CA-MRSA) is the leading cause in some countries. AIM: To evaluate epidemiological data, clinical and microbiological features and outcome of BJI. METHODS: A prospective descriptive study was conducted. RESULTS: 40 patients (p) completed the study. Bacterial cultures were positives in 30 p (75%): CA-MRSA was found in 19 p, methicillin-sensitive S. aureus in 6 p, and others in 5 p. Cultures were negatives in 10 p (25%). Median treatment duration was 28 days (r: 21-40 d); Analyzing patients with CA-MRSA positive cultures separately, initial CRP was higher (Md 76 vs 50 mg/L, p < 0.02), normalization occurred later (Md 14 days vs 7days, p < 0.03), and duration of treatment (Md 32 days vs 23, p < 0.004) as well as hospital stay (Md 9 days vs 7, p = 0.12) were longer. Sequelae were present in 3 p and 1 relapsed: All of them with CA-SAMR. CONCLUSION: CA-MRSA was the leading cause of BJI and was associated with higher CRP on admission, later normalization and longer treatment duration. Complications as drainage requirement, and sequelae were common in those p.


Asunto(s)
Antibacterianos/uso terapéutico , Artritis Infecciosa/microbiología , Staphylococcus aureus Resistente a Meticilina/aislamiento & purificación , Osteomielitis/microbiología , Infecciones Estafilocócicas/microbiología , Adolescente , Antibacterianos/farmacología , Artritis Infecciosa/tratamiento farmacológico , Niño , Preescolar , Infecciones Comunitarias Adquiridas/tratamiento farmacológico , Infecciones Comunitarias Adquiridas/microbiología , Femenino , Humanos , Lactante , Masculino , Staphylococcus aureus Resistente a Meticilina/efectos de los fármacos , Pruebas de Sensibilidad Microbiana , Osteomielitis/tratamiento farmacológico , Estudios Prospectivos , Infecciones Estafilocócicas/tratamiento farmacológico
7.
Artículo en Inglés | MEDLINE | ID: mdl-24456662

RESUMEN

Humans may be exposed to arsenic (As) and fluoride (F) through water consumption. However, the interaction between these two elements and gene expression in apoptosis or inflammatory processes in children has not been thoroughly investigated. Herein, the expression of cIAP-1, XIAP, TNF-α, ENA-78, survivin, CD25, and CD40 was evaluated by RT-PCR. Additionally, the surface expression of CD25, CD40, and CD40L on peripheral blood mononuclear cells was analyzed by flow cytometry, and TNF-α was measured by Western blotting. This study examined 72 children aged 6-12 years who were chronically exposed to As (154.2µg/L) and F (5.3mg/L) in drinking water and in food cooked with the same water. The urine concentrations of As (6.9-122.4µg/L) were positively correlated with the urine concentrations of F (1.0-8.8mg/L) (r(2)=0.413, p<0.0001). The CD25 gene expression levels and urine concentrations of As and F were negatively correlated, though the CD40 expression levels were negatively correlated only with the As concentration. Age and height influenced the expression of cIAP-1, whereas XIAP expression was correlated only with age. Additionally, there was a lower percentage of CD25- and CD40-positive cells in the group of 6- to 8-year-old children exposed to the highest concentrations of both As and F when compared to the 9- to 12-year-old group (CD25: 0.7±0.8 vs. 1.1±0.9, p<0.0014; CD40: 16.0±7.0 vs. 21.8±5.8, p<0.0003). PHA-stimulated lymphocytes did not show any changes in the induction of CD25, CD69, or CD95. In summary, high concentrations of As and F alter the expression patterns of CD25 and CD40 at both the genetic and protein levels. These changes could decrease immune responses in children exposed to As and F.


Asunto(s)
Apoptosis/efectos de los fármacos , Arsénico/toxicidad , Exposición a Riesgos Ambientales , Fluoruros/toxicidad , Expresión Génica/efectos de los fármacos , Inmunidad Activa/efectos de los fármacos , Leucocitos Mononucleares/efectos de los fármacos , Contaminantes Químicos del Agua/toxicidad , Apoptosis/genética , Proteínas Reguladoras de la Apoptosis/genética , Proteínas Reguladoras de la Apoptosis/metabolismo , Arsénico/orina , Niño , Femenino , Fluoruros/orina , Humanos , Inflamación/genética , Inflamación/metabolismo , Leucocitos Mononucleares/metabolismo , Activación de Linfocitos/efectos de los fármacos , Masculino , Factor de Necrosis Tumoral alfa/genética , Factor de Necrosis Tumoral alfa/metabolismo , Contaminantes Químicos del Agua/orina
8.
Osteoporos Int ; 24(2): 713-9, 2013 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-22588185

RESUMEN

SUMMARY: Fractures are increased among prostate cancer patients. No data have been reported in patients with prostate cancer about the relation between serum sex hormone-binding globulin (SHBG) and bone metabolism. We found that SHBG levels were inversely related to bone mass and vertebral fractures in this population. INTRODUCTION: Fractures are increased among prostate cancer patients, especially those on androgen deprivation therapy (ADT), but few data are available on the role of SHBG in their bone status. Our objective was to analyze the relation between serum SHBG and bone metabolism in prostate cancer patients. METHODS: This is a cross-sectional study including 91 subjects with prostate cancer (54 % with ADT). We measured serum levels of SHBG and sex steroids, bone mineral density (BMD) by dual-energy X-ray absorptiometry, and prevalent radiographic vertebral fractures. RESULTS: SHBG levels were inversely related to BMD (femoral neck: r = -0.299, p = 0.00; total hip: r = -0.259, p = 0.019). Subjects with osteoporosis had higher SHBG concentrations than patients without osteoporosis (60.97 ± 39.56 vs 44.45 ± 23.32 nmol/l, p = 0.022). Patients with SHBG levels in the first quartile (>57.6 nmol/l) had an odds ratio (OR) for osteoporosis of 2.59 (95 % CI, 1.30-5.12; p = 0.009) compared with patients with lower SHBG levels. In patients with SHBG >57.6 nmol/l, the OR for vertebral fractures was 2.34 (95 % CI, 1.15-4.78; p = 0.034). The calculated OR was higher after adjustment for age (OR, 5.16; 95 % CI, 1.09-24.49; p = 0.039), estrogens (OR, 6.45; 95 % CI, 1.44-28.95; p = 0.023), and androgens (OR, 5.51; 95 % CI, 1.36-22.37; p = 0.017). CONCLUSIONS: In prostate cancer patients, SHBG levels were inversely related to bone mass and vertebral fractures. Determination of the serum SHBG level may constitute a useful and straightforward marker for predicting the severity of osteoporosis in these patients.


Asunto(s)
Osteoporosis/etiología , Neoplasias de la Próstata/complicaciones , Globulina de Unión a Hormona Sexual/análisis , Fracturas de la Columna Vertebral/etiología , Absorciometría de Fotón , Anciano , Antagonistas de Andrógenos/efectos adversos , Antagonistas de Andrógenos/uso terapéutico , Antineoplásicos Hormonales/efectos adversos , Antineoplásicos Hormonales/uso terapéutico , Biomarcadores/sangre , Densidad Ósea/fisiología , Estudios Transversales , Cuello Femoral/fisiopatología , Hormonas Esteroides Gonadales/sangre , Hormona Liberadora de Gonadotropina/agonistas , Articulación de la Cadera/fisiopatología , Humanos , Masculino , Persona de Mediana Edad , Osteoporosis/sangre , Osteoporosis/fisiopatología , Fracturas Osteoporóticas/sangre , Fracturas Osteoporóticas/etiología , Fracturas Osteoporóticas/fisiopatología , Neoplasias de la Próstata/sangre , Neoplasias de la Próstata/tratamiento farmacológico , Fracturas de la Columna Vertebral/sangre , Fracturas de la Columna Vertebral/fisiopatología
9.
J Dairy Sci ; 95(2): 549-57, 2012 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-22281319

RESUMEN

Lactoferrin and lactoperoxidase are whey proteins with biological properties that may provide health benefits to consumers. These properties are vulnerable to potentially denaturing conditions during processing. High-pressure treatment is an appealing alternative to the traditional heat processing of foods because it exerts an antimicrobial effect without changing the sensory and nutritional quality of foods. In this work, the effect of high-pressure treatment on the denaturation of lactoferrin and lactoperoxidase present in skim milk and whey, and as isolated proteins in buffer, was studied over a pressure range of 450 to 700 MPa at 20°C. Denaturation of lactoferrin was measured by the loss of reactivity with their specific antibodies using a sandwich ELISA. Denaturation of lactoperoxidase was determined by measuring the loss of enzymatic activity using a spectrophotometric technique. No substantial inactivation of lactoperoxidase was observed in any treatment assayed. The concentration of the residual immunoreactive lactoferrin after each pressure treatment was determined, and the data were subjected to kinetic analysis to obtain D and Z values. Denaturation of lactoferrin increased with pressure and holding time, and D values were lower when lactoferrin was treated in whey than in milk, and lower in both whey and milk than in phosphate buffer. Thus, protein is denatured more slowly in buffer and in milk than in whey. Denaturation of lactoferrin in the 3 media was found to follow a reaction order of n=1.5. Volumes of activation of about -34.77, -24.35, and -24.09 mL/mol were obtained for lactoferrin treated in skim milk, whey, and buffer, respectively, indicating a decrease in protein volume under pressure.


Asunto(s)
Lactoferrina/metabolismo , Lactoperoxidasa/metabolismo , Animales , Anticuerpos/inmunología , Bovinos , Presión Hidrostática , Cinética , Lactoferrina/análisis , Lactoferrina/inmunología , Desnaturalización Proteica
10.
Bull Environ Contam Toxicol ; 89(4): 744-50, 2012 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-22893178

RESUMEN

The aim of this study was to develop a methodology for identifying and quantifying Fipronil and its degradation products in soil by gas chromatography-electron capture detector previously extracted using a focused ultrasound probe. This methodology was obtaining a range of recovery between 85% and 120%, decreasing approximately solvent used time and cost, respect to other methodologies such as bath ultrasonic, solid-phase extraction, liquid-liquid extraction and soxhlet. The method was validated in fortified matrix, presented linearity in the range of 25-400 µg kg(-1), and limit of detection for Fipronil and their products desulfinyl, sulfide and sulfone was 14.7, 9.8, 8.9 and 10.7 µg kg(-1), respectively. This process was applied to samples of agricultural soils, where two degradation products desulfinyl and sulfone were found.


Asunto(s)
Monitoreo del Ambiente/métodos , Insecticidas/análisis , Pirazoles/análisis , Contaminantes del Suelo/análisis , Agricultura , Insecticidas/química , Pirazoles/química , Suelo/química , Contaminantes del Suelo/química
12.
Farm Hosp ; 35(4): 204-15, 2011.
Artículo en Español | MEDLINE | ID: mdl-21093339

RESUMEN

OBJECTIVES: Identify the photosensitive drugs included in the hospital pharmacotherapeutic guide and search for stability data on the storage, reconstitution, and dilution of these compounds. METHODS: The data were obtained by referencing technical specifications, information provided by drug laboratories, and in some cases, we performed a more extensive bibliographic search (tertiary sources and conference lectures) for each particular medication. We also performed a data search on the PubMed information database (from 2004 to 2009). The drugs were placed in alphabetical order by brand since the stability of each drug when exposed to light does not depend exclusively on the primary active ingredient. Eight columns describe the principal characteristics of the drugs: brand name, active ingredient, laboratory, storage, reconstitution and dilution conditions, observations, and references. RESULTS: The listing was comprised of 139 photosensitive medicines, of the 1,954 included in the pharmacotherapeutical guide (table 1). CONCLUSIONS: The lack of studies published on the stability of photosensitive medications provided the need for an internal review at our hospital. It is important for drug-producing laboratories to perform photo-sensitivity tests on their products, with the results presented in the technical specifications in order to provide more accessible and reliable information. We believe that this should be required by law.


Asunto(s)
Estabilidad de Medicamentos , Luz , Preparaciones Farmacéuticas/efectos de la radiación , Embalaje de Medicamentos/normas , Almacenaje de Medicamentos , Formularios Farmacéuticos como Asunto , Fotoquímica
13.
J Appl Microbiol ; 108(2): 488-98, 2010 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-19659701

RESUMEN

AIMS: The present work investigates the feasibility of using flow cytometry (FCM) combined with fluorescent-labelled specific polyclonal antibodies for the detection and presumptive identification of Clostridium tyrobutyricum spores in bovine milk. METHODS AND RESULTS: Two fluorescent molecules (fluorescein isothiocyanate and Alexa Fluor 488) were conjugated to antispores polyclonal antibodies. Side scatter and forward scatter profiles of the Cl. tyrobutyricum spores marked with fluorescent antibodies permitted the detection of spores and differentiated them from other related microbial species. The detection limit of this method was 10(3) spores per 100 ml of milk, and results could be achieved in 2 h. CONCLUSIONS: FCM combined with fluorochrome-conjugated antibodies, especially Alexa Fluor, could be an efficacious means to detect and provide presumptive identification of Cl. tyrobutyricum spores, as well as differentiation from other Clostridium species that can also cause late blowing in cheese. SIGNIFICANCE AND IMPACT OF THE STUDY: This study describes the basis for the development of a method suitable for analysis of milk destined for cheese manufacture that would permit the detection of Cl. tyrobutyricum spores in a short period. This would enable the industry to use contaminated milk for dairy products other than cheese where Cl. tyrobutyricum does not cause a problem.


Asunto(s)
Clostridium tyrobutyricum/aislamiento & purificación , Microbiología de Alimentos , Leche/microbiología , Animales , Citometría de Flujo , Fluoroinmunoensayo , Límite de Detección , Esporas Bacterianas/aislamiento & purificación
14.
J Med Genet ; 46(1): 64-7, 2009 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-19124644

RESUMEN

BACKGROUND: Neurogenic muscle weakness, ataxia and retinitis pigmentosa (NARP) syndrome have been associated to m.8993T>G/C mutations in the subunit 6 of the ATP synthase (p.MT-ATP6). METHODS: We have performed a mutational screening of the mitochondrial DNA gene encoding for this protein in 62 patients with the disease, that do not carry any of the common mutations described to date. RESULTS: We report clinical and molecular data in one patient who harbours a de novo insertion in the MT-ATP6 gene that results in a truncated subunit. The mutation was heteroplasmic (85%) in muscle DNA and the BN-PAGE analysis showed a clear decrease in the amount of ATP synthase. CONCLUSION: Molecular analysis of NARP patients cannot be limited to the search of the m.8993T>G/C and either the ATP6 or the whole mtDNA should be sequenced.


Asunto(s)
Ataxia/genética , ADN Mitocondrial/genética , ATPasas de Translocación de Protón Mitocondriales/genética , Debilidad Muscular/genética , Retinitis Pigmentosa/genética , Adulto , Secuencia de Aminoácidos , Secuencia de Bases , Encéfalo/patología , Humanos , Masculino , Datos de Secuencia Molecular , Mutación Puntual , Análisis de Secuencia , Síndrome
15.
J Dairy Sci ; 93(10): 4480-9, 2010 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-20854981

RESUMEN

The aim of this work was to study the effect of milk supplementation with lactoferrin of different iron saturation on the manufacturing and characteristics of yogurt. Bovine lactoferrin was added at concentrations of 0.5, 1, and 2 mg/mL in the holo (iron saturated) and apo (without iron) forms. Some physicochemical properties, such as pH, concentration of lactic acid, and texture of supplemented yogurts, were determined throughout the shelf-life period storage (28 d) at 4°C. We also evaluated the stability of lactoferrin in supplemented yogurt throughout the storage time. The supplementation of milk with bovine lactoferrin did not greatly affect the physical properties of the yogurt, though apo-lactoferrin slightly delayed the decrease of pH. This could be attributed to the partial inhibition observed on the growth of Streptococcus thermophilus. The integrity and immunoreactive concentration of lactoferrin, determined by Western blotting and noncompetitive ELISA, respectively, remained constant throughout the shelf life of yogurt.


Asunto(s)
Aditivos Alimentarios , Lactoferrina/administración & dosificación , Leche/química , Yogur/análisis , Animales , Bovinos , Manipulación de Alimentos , Concentración de Iones de Hidrógeno , Ácido Láctico/metabolismo , Lactoferrina/análisis , Factores de Tiempo , Viscosidad
16.
J Microbiol Methods ; 169: 105818, 2020 02.
Artículo en Inglés | MEDLINE | ID: mdl-31881287

RESUMEN

Clostridium tyrobutyricum is the major agent that causes the blowing defect in cheese due to the germination of its dormant spores during the ripening stage. As a result, many of the affected cheeses show cavities and cracks, which cause the product loss in most cases. Nowadays, there is not a fast method capable of detecting milk contaminated with C. tyrobutyricum spores. The aim of this study has been to develop a fast and reliable method based on real time PCR (qPCR) to detect C. tyrobutyricum spores in raw milk. One of the main limitations has been to find a good procedure for the spore disruption to extract the DNA due to its high resistance. For this reason, different disruption methods have been tested, including chemical agents, bead beating, enzymatic and microwave treatment. Furthermore, an enzymatic treatment with subtilisin was applied for milk clarification and recovery of spores. The comparison of the assayed methods has been made using sterile milk spiked with C. tyrobutyricum spores, obtained in solid or liquid medium. The results showed that microwave treatment followed by a standard DNA purification step was found to be the best disruption method. The Ct values obtained for spores were higher than those found for vegetative cells by qPCR, for the same quantity of DNA. This difference could be due to the action of the Small Acid Soluble Proteins (SASP) in the DNA packaging of spores. Moreover, spores obtained in agar plate were found more resistant to disruption than those obtained in liquid medium. Subtilisin and microwave treatments were found to be successful for DNA extraction from C. tyrobutyricum spores in milk and subsequent identification by qPCR. However, the differences observed between the amplification of DNA from spores obtained in different media and from vegetative cells have to be taken into account to optimize a method for C. tyrobutyricum detection.


Asunto(s)
Queso/microbiología , Clostridium tyrobutyricum/genética , ADN Bacteriano/genética , Leche/microbiología , Esporas Bacterianas/genética , Animales , Extractos Celulares/genética , Clostridium tyrobutyricum/aislamiento & purificación , Microbiología de Alimentos/métodos , Reacción en Cadena en Tiempo Real de la Polimerasa , Esporas Bacterianas/metabolismo , Subtilisina/farmacología
17.
Neurologia (Engl Ed) ; 35(5): 295-302, 2020 Jun.
Artículo en Inglés, Español | MEDLINE | ID: mdl-32448674

RESUMEN

INTRODUCTION: Ischaemic stroke has been reported in patients with COVID-19, particularly in more severe cases. However, it is unclear to what extent this is linked to systemic inflammation and hypercoagulability secondary to the infection. METHODS: We describe the cases of 4 patients with ischaemic stroke and COVID-19 who were attended at our hospital. Patients are classified according to the likelihood of a causal relationship between the hypercoagulable state and ischaemic stroke. We also conducted a review of studies addressing the possible mechanisms involved in the aetiopathogenesis of ischaemic stroke in these patients. RESULTS: The association between COVID-19 and stroke was probably causal in 2 patients, who presented cortical infarcts and had no relevant arterial or cardioembolic disease, but did show signs of hypercoagulability and systemic inflammation in laboratory analyses. The other 2 patients were of advanced age and presented cardioembolic ischaemic stroke; the association in these patients was probably incidental. CONCLUSIONS: Systemic inflammation and the potential direct action of the virus may cause endothelial dysfunction, resulting in a hypercoagulable state that could be considered a potential cause of ischaemic stroke. However, stroke involves multiple pathophysiological mechanisms; studies with larger samples are therefore needed to confirm our hypothesis. The management protocol for patients with stroke and COVID-19 should include a complete aetiological study, with the appropriate safety precautions always being observed.


Asunto(s)
Isquemia Encefálica/etiología , Infecciones por Coronavirus/complicaciones , Neumonía Viral/complicaciones , Accidente Cerebrovascular/virología , Anciano , Anciano de 80 o más Años , Betacoronavirus/aislamiento & purificación , COVID-19 , Sistema Nervioso Central/virología , Infecciones por Coronavirus/sangre , Infecciones por Coronavirus/virología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Pandemias , Neumonía Viral/sangre , Neumonía Viral/virología , Factores de Riesgo , SARS-CoV-2 , Accidente Cerebrovascular/sangre , Trombofilia/virología
18.
J Clin Immunol ; 29(4): 461-9, 2009 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-19247822

RESUMEN

INTRODUCTION: Arsenic (As) affects the function and survival of lymphocytes, and some arsenic compounds exert a relevant antineoplastic effect. We have explored the effect of As on T regulatory cells. RESULTS AND DISCUSSION: In vitro experiments with peripheral blood mononuclear cells from healthy subjects showed that low concentrations of As tended to increase the number of natural T regulatory (nTreg) lymphocytes, whereas concentrations >5.0 muM had an opposite effect. Furthermore, rats exposed to As showed redistribution of nTreg cells, and As administration to rats with experimental allergic encephalomyelitis increased the levels of nTreg cells in spleen and diminished the severity of this condition. On the other hand, in 47 apparently healthy subjects chronically exposed to As, we found significant inverse correlation between urinary As levels and the number and function of nTreg lymphocytes. Although most of these individuals showed enhanced levels of apoptotic lymphocytes in peripheral blood, with a diminution of mitochondrial membrane potential, no significant correlation between these parameters and urinary As was detected. CONCLUSION: Our data indicate that As seems to have a relevant and complex effect on nTreg cells.


Asunto(s)
Apoptosis , Arsénico/farmacología , Linfocitos T Reguladores/efectos de los fármacos , Adolescente , Adulto , Animales , Arsénico/orina , Encefalomielitis Autoinmune Experimental/inmunología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Ratas , Linfocitos T Reguladores/inmunología , Receptor Toll-Like 4/efectos de los fármacos , Receptor Toll-Like 4/inmunología , Factor de Necrosis Tumoral alfa/efectos de los fármacos , Factor de Necrosis Tumoral alfa/inmunología , Adulto Joven
19.
O.F.I.L ; 34(1): 67-71, 2024. tab, graf
Artículo en Español | IBECS (España) | ID: ibc-232625

RESUMEN

Objetivos: Analizar la efectividad y seguridad en vida real de los nuevos anticuerpos monoclonales subcutáneos para la profilaxis de la migraña. Métodos: Estudio observacional retrospectivo llevado a cabo desde enero de 2020 hasta abril de 2021 con pacientes diagnosticados de migraña crónica o episódica. Las variables de interés se analizaron por el personal facultativo farmacéutico en una base de datos anonimizada. Esta base se completa como práctica clínica habitual durante la entrevista clínica en la consulta de pacientes externos. Resultados: Se analizaron 53 pacientes. Se observó una reducción del número de crisis respecto al valor basal a los 3, a los 6 y a los 12 meses de tratamiento, así como de otros fármacos para el tratamiento de la migraña. La mayoría de reacciones adversas descritas fueron de tipo leve, obligando a la suspensión del tratamiento de solo uno de los pacientes. Se describió un aumento de la tensión arterial en varios pacientes, así como una incidencia de estreñimiento superior a los ensayos pivotales. Conclusiones: Este estudio muestra una disminución del número de crisis de migraña y del uso de otros fármacos antimigrañosos tras el uso de anticuerpos monoclonales. Los tratamientos se pueden considerar seguros, observándose una baja incidencia de reacciones adversas graves. La mayoría de pacientes fueron tratados con erenumab. Se dispone de menos datos a medida que avanza del tiempo de estudio, por lo que resulta necesario recopilar más información para conocer el perfil de efectividad y seguridad de estos fármacos a largo plazo.(AU)


Objectives: To analyse the effectiveness and safety in real life of new subcutaneous monoclonal antibodies for the prophylaxis of migraine. Methods: Retrospective observational study conducted from January 2020 to April 2021 with patients diagnosed with chronic or episodic migraine. The variables of interest were collected by the pharmacist in an anonymised database during the clinical interview in the outpatient clinic. This databased is completed as standard clinical practice during the clinical interview in the outpatient clinic. Results: 53 patients were analysed. A reduction in the number of attacks from baseline was observed at 3, 6 and 12 months of treatment, as well as for other migraine treatment drugs. Most of the adverse reactions described were mild, leading to discontinuation of treatment in only one patient. An increase in blood pressure was reported in several patients, as well as a higher incidence of constipation than in pivotal trials. Conclusions: This study shows a decrease in the number of migraine attacks and in the use of other anti-migraine drugs after the use of monoclonal antibodies. The treatments can be considered safe, with a low incidence of serious adverse reactions. Most patients were treated with erenumab. Less information is available as the study time progresses, so more information needs to be collected to understand the long-term effectiveness and safety profile of these drugs.(AU)


Asunto(s)
Humanos , Masculino , Femenino , Anticuerpos Monoclonales , Trastornos Migrañosos/tratamiento farmacológico , Resultado del Tratamiento , Trastornos Migrañosos/prevención & control , Estudios Retrospectivos , Farmacia , Quimioterapia
20.
Rev Neurol ; 69(8): 332-336, 2019 Oct 16.
Artículo en Español | MEDLINE | ID: mdl-31588987

RESUMEN

INTRODUCTION: HaNDL (headache and neurological deficits with cerebrospinal fluid lymphocytosis) syndrome is a self-limiting benign condition which, as its name suggests, causes episodes of transient neurological deficits of a motor, sensory, aphasic and, less frequently, visual nature lasting several hours, accompanied or followed by moderate-to-severe headache and lymphocytosis of the cerebrospinal fluid. Its incidence is low in adulthood, and it is extremely uncommon in the paediatric age. Recurrence of episodes usually occurs in the first three months. It has an excellent prognosis. CASE REPORT: A 12-year-old female with intense frontal headache that suddenly begins on the tenth day, with clinical signs and symptoms of dysarthria and right hemiparesis with subsequent aphasia and generalised hypotonia. After ruling out other conditions by means of complementary examinations and the clinical course, the patient was finally diagnosed with HaNDL syndrome, since it fulfilled the clinical criteria of the International Headache Society (IHS). CONCLUSIONS: The patient met the criteria established by the IHS for the diagnosis of HaNDL syndrome. The main historical, epidemiological and clinical data are analysed and the differential diagnosis of HaNDL syndrome in the paediatric age is described.


TITLE: Sindrome HaNDL en una niña de 12 años.Introduccion. El sindrome HaNDL (headache and neurologic deficits with cerebrospinal fluid lymphocytosis) es una entidad autolimitada y benigna que cursa, como su nombre indica, con aparicion de episodios de deficits neurologicos transitorios de naturaleza motora, sensitiva o afasica, y menos frecuentemente visual, de varias horas de duracion, acompañados o seguidos de cefalea moderada-grave y linfocitosis del liquido cefalorraquideo. Su incidencia es baja en la edad adulta, y casi excepcional en la edad pediatrica. La recurrencia de los episodios suele producirse en los primeros tres meses. El pronostico es excelente. Caso clinico. Mujer de 12 años con cefalea frontal intensa que inicia en el decimo dia, de forma brusca, clinica de disartria y hemiparesia derecha con posterior afasia e hipotonia generalizada. Tras descartarse mediante exploraciones complementarias y evolucion clinica otras entidades, fue finalmente diagnosticada de sindrome HaNDL, ya que cumplia los criterios clinicos de la Sociedad Internacional de Cefaleas (IHS). Conclusiones. La paciente reunio los criterios de la IHS para el diagnostico de sindrome HaNDL. Se analizan los principales datos historicos, epidemiologicos y clinicos, y se expone el diagnostico diferencial del sindrome HaNDL en la edad pediatrica.


Asunto(s)
Cefalea , Linfocitosis/líquido cefalorraquídeo , Enfermedades del Sistema Nervioso , Niño , Femenino , Cefalea/diagnóstico , Humanos , Linfocitosis/diagnóstico , Enfermedades del Sistema Nervioso/diagnóstico , Síndrome
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