Transcriptomic and lipidomic analysis of the differential pathway contribution to the incorporation of erucic acid to triacylglycerol during Pennycress seed maturation.

Thlaspi arvense (Pennycress) is an emerging feedstock for biofuel production because of its high seed oil content enriched in erucic acid. A transcriptomic and a lipidomic study were performed to analyze the dynamics of gene expression, glycerolipid content and acyl-group distribution during seed maturation. Genes involved in fatty acid biosynthesis were expressed at the early stages of seed maturation. Genes encoding enzymes of the Kennedy pathway like diacylglycerol acyltransferase1 (TaDGAT1), lysophosphatidic acid acyltransferase (TaLPAT) or glycerol 3-phosphate acyltransferase (TaGPAT) increased their expression with maturation, coinciding with the increase in triacylglycerol species containing 22:1. Positional analysis showed that the most abundant triacylglycerol species contained 18:2 at sn-2 position in all maturation stages, suggesting no specificity of the lysophosphatidic acid acyltransferase for very long chain fatty acids. Diacylglycerol acyltransferase2 (TaDGAT2) mRNA was more abundant at the initial maturation stages, coincident with the rapid incorporation of 22:1 to triacylglycerol, suggesting a coordination between Diacylglycerol acyltransferase enzymes for triacylglycerol biosynthesis. Genes encoding the phospholipid-diacylglycerol acyltransferase (TaPDAT1), lysophosphatidylcholine acyltransferase (TaLPCAT) or phosphatidylcholine diacylglycerolcholine phosphotransferase (TaPDCT), involved in acyl-editing or phosphatidyl-choline (PC)-derived diacylglycerol (DAG) biosynthesis showed also higher expression at the early maturation stages, coinciding with a higher proportion of triacylglycerol containing C18 fatty acids. These results suggested a higher contribution of these two pathways at the early stages of seed maturation. Lipidomic analysis of the content and acyl-group distribution of diacylglycerol and phosphatidyl-choline pools was compatible with the acyl content in triacylglycerol at the different maturation stages. Our data point to a model in which a strong temporal coordination between pathways and isoforms in each pathway, both at the expression and acyl-group incorporation, contribute to high erucic triacylglycerol accumulation in Pennycress.

Public Perception of Organ Donation and Transplantation Policies in Southern Spain.

BACKGROUND: This research explores how public awareness and attitudes toward donation and transplantation policies may contribute to Spain's success in cadaveric organ donation. MATERIALS AND METHODS: A representative sample of 813 people residing in Andalusia (Southern Spain) were surveyed by telephone or via Internet between October and December 2018. RESULTS: Most participants trust Spain's donation and transplantation system (93%) and wish to donate their organs after death (76%). Among donors, a majority have expressed their consent (59%), and few nondonors have expressed their refusal (14%). Only a minority are aware of the presumed consent system in force (28%) and feel sufficiently informed regarding the requirements needed to be an organ donor (16%). Participants mainly consider that relatives should represent the deceased's preferences and be consulted when the deceased's wishes are unknown, as is the case in Spain. CONCLUSION: Public trust in the transplant system may contribute to Spain's high performance in organ donation. High levels of societal support toward organ donation and transplantation do not correspond with similar levels of public awareness of donation and transplantation policies in Spain.

Alteraciones del sueño en pacientes con enfermedad renal crónica avanzada / Sleep disturbances in patients with advanced chronic kidney disease

INTRODUCCIÓN: Los pacientes con Enfermedad Renal Crónica Avanzada, sufren una amplia variedad de síntomas físicos y psicológicos. Al llegar a estadios finales, sufren alteraciones significativas en la salud física, mental, emocional y social, destacándose el impacto en la calidad del sueño. OBJETIVO: Analizar las principales alteraciones del sueño en pacientes con Enfermedad Renal Crónica Avanzada. MATERIAL Y MÉTODO: Se llevó a cabo un estudio observacional descriptivo transversal en el Servicio de Nefrología del Hospital Universitario Reina Sofía de Córdoba en pacientes con Enfermedad Renal Crónica Avanzada en estadios 4-5. Se estudiaron las alteraciones del sueño mediante el cuestionario Índice de Calidad de Sueño de Pittsburg y su relación con otras variables como la edad, sexo, comorbilidad, Hemoglobina, Creatinina Sérica e Índice de Masa Corporal. RESULTADOS: Se estudiaron 119 pacientes, con una edad media de 67,61±14,89 años; 52 mujeres (43,7%). El valor medio del Índice de Calidad de Sueño fue de 9,66±4 puntos. El 83,2% de los pacientes presentaban alteraciones del sueño (puntuación >5 puntos). Esta puntuación mostró tener una relación significativa con la comorbilidad y la edad. No se encontraron relaciones entre las alteraciones del sueño con el sexo, aclaramiento renal ni Índice de Masa Corporal. CONCLUSIÓN: Una mayoría de los pacientes con Enfermedad Renal Crónica Avanzada en estadios 4-5 presentan alteraciones del sueño. Estas alteraciones están relacionadas con mayor comorbilidad y edad avanzada, sin que el sexo, el aclaramiento renal o el Índice de Masa Corporal tengan relación con esta alteración, al menos en la muestra estudiada

INTRODUCTION: Patients with advanced chronic kidney disease suffer from a wide variety of physical and psychological symptoms. In final stages, they suffer significant alterations in physical, mental, emotional and social health, highlighting the impact on the quality of sleep. OBJECTIVE: To analyse the main sleep disorders in patients with Advanced Chronic Kidney Disease (ACKD). MATERIAL AND METHODS: A cross-sectional descriptive observational study was carried out in the Nephrology Unit of the Reina Sofía University Hospital (Córdoba) in patients with ACKD in stages 4-5. Sleep disturbances were studied using the Pittsburg Sleep Quality Index questionnaire as well as the relationship with other variables such as age, sex, comorbidity, Haemoglobin, Serum Creatinine, and Body Mass Index. RESULTS: 119 patients were studied, with a mean age of 67.61±14.89 years; 52 women (43.7%). The mean value of the Sleep Quality Index was 9.66±4 points. 83.2% of the patients had sleep disturbances (score> 5 points). A significant relationship was found with comorbidity and age. No relationships were found between sleep disturbances with sex, renal clearance or Body Mass Index. CONCLUSION: A large percentage of patients with ACKD in stages 4-5 have sleep disturbances. These alterations are related to greater comorbidity and advanced age; sex, renal clearance or Body Mass Index have not shown a relationship, at least in the sample studied

Functional analysis of ß-ketoacyl-CoA synthase from biofuel feedstock Thlaspi arvense reveals differences in the triacylglycerol biosynthetic pathway among Brassicaceae.

KEY MESSAGE: Differences in FAE1 enzyme affinity for the acyl-CoA substrates, as well as the balance between the different pathways involved in their incorporation to triacylglycerol might be determinant of the different composition of the seed oil in Brassicaceae. Brassicaceae present a great heterogeneity of seed oil and fatty acid composition, accumulating Very Long Chain Fatty Acids with industrial applications. However, the molecular determinants of these differences remain elusive. We have studied the ß-ketoacyl-CoA synthase from the high erucic feedstock Thlaspi arvense (Pennycress). Functional characterization of the Pennycress FAE1 enzyme was performed in two Arabidopsis backgrounds; Col-0, with less than 2.5% of erucic acid in its seed oil and the fae1-1 mutant, deficient in FAE1 activity, that did not accumulate erucic acid. Seed-specific expression of the Pennycress FAE1 gene in Col-0 resulted in a 3 to fourfold increase of erucic acid content in the seed oil. This increase was concomitant with a decrease of eicosenoic acid levels without changes in oleic ones. Interestingly, only small changes in eicosenoic and erucic acid levels occurred when the Pennycress FAE1 gene was expressed in the fae1-1 mutant, with high levels of oleic acid available for elongation, suggesting that the Pennycress FAE1 enzyme showed higher affinity for eicosenoic acid substrates, than for oleic ones in Arabidopsis. Erucic acid was incorporated to triacylglycerol in the transgenic lines without significant changes in their levels in the diacylglycerol fraction, suggesting that erucic acid was preferentially incorporated to triacylglycerol via DGAT1. Expression analysis of FAE1, AtDGAT1, AtLPCAT1 and AtPDAT1 genes in the transgenic lines further supported this conclusion. Differences in FAE1 affinity for the oleic and eicosenoic substrates among Brassicaceae, as well as their incorporation to triacylglycerol might explain the differences in composition of their seed oil.

Identification of target genes and processes involved in erucic acid accumulation during seed development in the biodiesel feedstock Pennycress (Thlaspi arvense L.).

We studied erucic acid accumulation in the biodiesel feedstock Pennycress (Thlaspi arvense L.) as a first step towards the development of a sustainable strategy for biofuel production in the EU territory. To that end, two inbred Pennycress lines of European origin, "NASC" and "French," were cultivated in a controlled chamber and in experimental field plots, and their growth, seed production and seed oil characteristics analyzed. Differences in some agronomical traits like vernalization (winter-French versus spring-NASC), flowering time (delayed in the French line) and seed production (higher in the French line) were detected. Both lines showed a high amount (35-39%) of erucic acid (22:1Δ13) in their seed oil. Biochemical characterization of the Pennycress seed oil indicated that TAG was the major reservoir of 22:1Δ13. Incorporation of 22:1Δ13 to TAG occurred very early during seed maturation, concomitant with a decrease of desaturase activity. This change in the acyl fluxes towards elongation was controlled by different genes at different levels. TaFAE1 gene, encoding the fatty acid elongase, seemed to be controlled at the transcriptional level with high expression at the early stages of seed development. On the contrary, the TaFAD2 gene that encodes the Δ12 fatty acid desaturase or TaDGAT1 that catalyzes TAG biosynthesis were controlled post-transcriptionally. TaWRI1, the master regulator of seed-oil biosynthesis, showed also high expression at the early stages of seed development. Our data identified genes and processes that might improve the biotechnological manipulation of Pennycress seeds for high-quality biodiesel production.

Neuroprotective effect of individual ginsenosides on astrocytes primary culture.

Most of the known pharmacological effects of Panax ginseng on the central nervous system are due to its major components - ginsenosides. Although the antioxidant ability of ginseng root has already been established, this activity has never been evaluated for isolated ginsenosides on astrocytes. The activity of protopanaxadiols Rb(1), Rb(2), Rc and Rd, and protopanaxatriols Re and Rg(1) was evaluated in vitro on astrocytes primary culture by means of an oxidative stress model with H(2)O(2). The viability of astrocytes was determined by the MTT reduction assay and by the LDH release into the incubation medium. The effects on the antioxidant enzymes catalase, superoxide dismutase (SOD), glutathione peroxidases (GPx) and glutathione reductase (GR) and on the intracellular reactive oxygen species (ROS) formation were also investigated. Exposure of astrocytes to H(2)O(2) decreased cell viability as well as the antioxidant enzymes activity and increased ROS formation. Oxidative stress produced significant cell death that was reduced by previous treatment with the tested ginsenosides. Ginsenosides Rb(1), Rb(2), Re and Rg(1) were effective in reducing astrocytic death, while Rb(1), Rb(2), Rd, Re and Rg(1) decreased ROS formation, ginsenoside Re being the most active. Ginsenosides from P. ginseng induce neuroprotection mainly through activation of antioxidant enzymes.

[Microbiological, clinical and epidemiological aspects of Streptococcus pneumoniae isolates recovered over two years]. / Aspectos microbiológicos y clinicoepidemiológicos de los aislados de Streptococcus pneumoniae durante dos años.

INTRODUCTION: Streptococcus pneumoniae is the most frequent cause of non-hospital acquired pneumonia and meningitis in adults, and bacterial otitis media in children. Moreover, it causes a third of all acute sinusitis cases. Penicillin has been the treatment of choice for almost 50 years. Gradually, penicillin-resistant pneumococci have appeared throughout the world. Our aim was to investigate the epidemiology, pattern of resistance and serotypes of Streptococcus pneumoniae infection in our area. METHODS: Over a period of two years (May 1997-May 1999), Streptococcus pneumoniae strains were isolated in the Clinical Microbiology Unit of the University Hospital Virgen de la Victoria in Málaga, Spain. This is a 750-bed hospital covering a population of 407,480 inhabitants, and admitting 21,500 hospitalized patients per year. Streptococcus was identified by standard procedures: serotyping was done with the Quellung test and antibiotic susceptibility study by the disk diffusion method and E-test. RESULTS: Streptococcus pneumoniae infection was diagnosed in 170 patients during the years studied. The microorganism was isolated from samples of sputum (82), blood (43), aspirated bronchial fluid, cerebrospinal fluid (6), and exudates (7). Non-hospital origin was identified in 88% of cases. The mean hospital stay was 12 days and mortality was 12.4%. Some 45.9% of the isolated strains were resistant to penicillin and 20% to cefotaxime. We found 31 different serotypes, with 77% of the isolated strains belonging to 12 serotypes. Serotypes 19, 3 and 6B were the most frequent in non-hospital infection, whereas 9V and 23F were related with nosocomial infection. Penicillin-resistant strains of Streptococcus pneumoniae belonged to 19 different serotypes; 6B, 9V, 14, 19 and 23F were the most important. CONCLUSIONS: As was expected, Streptococcus pneumoniae infections of mainly non-hospital origin in our area were characterized by elevated mortality and high-level resistance to penicillin. Immunosuppression was a predisposing factor.

Tumor neuroectodérmico primitivo mediastínico con extensión cervical. A propósito de un caso / Primitive mediastinal neuroectodermal tumor with cervical extension: a case report

El tumor neuroectodérmico primitivo (TNEP) es un entidad rara que forma parte de la familia de los tumores de Ewing. Histológicamente presentan células redondas pequeñas y muestran diferenciación neuroectodérmica en distintos grados.En la mayor parte de los casos los hallazgos radiológicos no permiten realizar un diagnóstico específico, siendo necesario para ello estudios de microscopía electrónica y pruebas de inmunohistoquímica.Presentamos un caso de TNEP en un varón de 29 años de edad, sin antecedentes personales de interés, y realizamos una revisión bibliográfica de este tipo de tumores, sobre los que existen pocas publicaciones acerca de su aspecto radiológico (AU)