Cellular dynamics during maturation-related decline of adventitious root formation in forest tree species.

Adventitious root formation is a process in which roots are induced, from determined or differentiated cells that have not been specified to develop a root, at positions where they do not normally occur during development. In forest tree species, a decline in the capacity to form adventitious roots from similar cell types in stem cuttings is associated with tree age and maturity. This decline limits the success of vegetative propagation of selected adult trees. The joint action of local signals and a dynamic cascade of regulatory changes in gene expression, resulting in stereotypical cell division patterns, regulate cell fate changes that enable a somatic differentiated cell to reactivate meristem programs toward the induction of an adventitious root meristem.

The GRAS gene family in pine: transcript expression patterns associated with the maturation-related decline of competence to form adventitious roots.

BACKGROUND: Adventitious rooting is an organogenic process by which roots are induced from differentiated cells other than those specified to develop roots. In forest tree species, age and maturation are barriers to adventitious root formation by stem cuttings. The mechanisms behind the respecification of fully differentiated progenitor cells, which underlies adventitious root formation, are unknown. RESULTS: Here, the GRAS gene family in pine is characterized and the expression of a subset of these genes during adventitious rooting is reported. Comparative analyses of protein structures showed that pine GRAS members are conserved compared with their relatives in angiosperms. Relatively high GRAS mRNA levels were measured in non-differentiated proliferating embryogenic cultures and during embryo development. The mRNA levels of putative GRAS family transcription factors, including Pinus radiata's SCARECROW (SCR), PrSCR, and SCARECROW-LIKE (SCL) 6, PrSCL6, were significantly reduced or non-existent in adult tissues that no longer had the capacity to form adventitious roots, but were maintained or induced after the reprogramming of adult cells in rooting-competent tissues. A subset of genes, SHORT-ROOT (PrSHR), PrSCL1, PrSCL2, PrSCL10 and PrSCL12, was also expressed in an auxin-, age- or developmental-dependent manner during adventitious root formation. CONCLUSIONS: The GRAS family of pine has been characterized by analyzing protein structures, phylogenetic relationships, conserved motifs and gene expression patterns. Individual genes within each group have acquired different and specialized functions, some of which could be related to the competence and reprogramming of adult cells to form adventitious roots.

Maritime Pine Rootstock Genotype Modulates Gene Expression Associated with Stress Tolerance in Grafted Stems.

Climate change-induced hazards, such as drought, threaten forest resilience, particularly in vulnerable regions such as the Mediterranean Basin. Maritime pine (Pinus pinaster Aiton), a model species in Western Europe, plays a crucial role in the Mediterranean forest due to its genetic diversity and ecological plasticity. This study characterizes transcriptional profiles of scion and rootstock stems of four P. pinaster graft combinations grown under well-watered conditions. Our grafting scheme combined drought-sensitive and drought-tolerant genotypes for scions (GAL1056: drought-sensitive scion; and Oria6: drought-tolerant scion) and rootstocks (R1S: drought-sensitive rootstock; and R18T: drought-tolerant rootstock). Transcriptomic analysis revealed expression patterns shaped by genotype provenance and graft combination. The accumulation of differentially expressed genes (DEGs) encoding proteins, involved in defense mechanisms and pathogen recognition, was higher in drought-sensitive scion stems and also increased when grafted onto drought-sensitive rootstocks. DEGs involved in drought tolerance mechanisms were identified in drought-tolerant genotypes as well as in drought-sensitive scions grafted onto drought-tolerant rootstocks, suggesting their establishment prior to drought. These mechanisms were associated with ABA metabolism and signaling. They were also involved in the activation of the ROS-scavenging pathways, which included the regulation of flavonoid and terpenoid metabolisms. Our results reveal DEGs potentially associated with the conifer response to drought and point out differences in drought tolerance strategies. These findings suggest genetic trade-offs between pine growth and defense, which could be relevant in selecting more drought-tolerant Pinus pinaster trees.

Decrease in Mortality after the Implementation of a Hospital Model to Improve Performance in Sepsis Care: Princess Sepsis Code.

Sepsis is a time-dependent disease whose prognosis is influenced by early diagnosis and therapeutic measures. Mortality from sepsis remains high, and for this reason, the guidelines of the Surviving Sepsis Campaign recommend establishing specific care programs aimed at patients with sepsis. We present the results of the application of a hospital model to improve performance in sepsis care, called Princess Sepsis Code, with the aim of reducing mortality. A retrospective study was conducted using clinical, epidemiological, and outcome variables in patients diagnosed with sepsis from 2015 to 2022. A total of 2676 patients were included, 32% of whom required admission to the intensive care unit, with the most frequent focus of the sepsis being abdominal. Mortality in 2015, at the beginning of the sepsis code program, was 24%, with a declining rate noted over the study period, with mortality reaching 17% in 2022. In the multivariate analysis, age > 70 years, respiratory rate > 22 rpm, deterioration in the level of consciousness, serum lactate > 2 mmol/L, creatinine > 1.6 mg/dL, and the focus of the sepsis were identified as variables independently related to mortality. The implementation of the Princess Sepsis Code care model reduces the mortality of patients exhibiting sepsis and septic shock.

Expression Levels of Genes Encoding Proteins Involved in the Cell Wall-Plasma Membrane-Cytoskeleton Continuum Are Associated With the Maturation-Related Adventitious Rooting Competence of Pine Stem Cuttings.

Stem cutting recalcitrance to adventitious root formation is a major limitation for the clonal propagation or micropropagation of elite genotypes of many forest tree species, especially at the adult stage of development. The interaction between the cell wall-plasma membrane and cytoskeleton may be involved in the maturation-related decline of adventitious root formation. Here, pine homologs of several genes encoding proteins involved in the cell wall-plasma membrane-cytoskeleton continuum were identified, and the expression levels of 70 selected genes belonging to the aforementioned group and four genes encoding auxin carrier proteins were analyzed during adventitious root formation in rooting-competent and non-competent cuttings of Pinus radiata. Variations in the expression levels of specific genes encoding cell wall components and cytoskeleton-related proteins were detected in rooting-competent and non-competent cuttings in response to wounding and auxin treatments. However, the major correlation of gene expression with competence for adventitious root formation was detected in a family of genes encoding proteins involved in sensing the cell wall and membrane disturbances, such as specific receptor-like kinases (RLKs) belonging to the lectin-type RLKs, wall-associated kinases, Catharanthus roseus RLK1-like kinases and leucine-rich repeat RLKs, as well as downstream regulators of the small guanosine triphosphate (GTP)-binding protein family. The expression of these genes was more affected by organ and age than by auxin and time of induction.

Recommendations for the early diagnosis of suspected human immunodeficiency virus infection in the emergency department and the referral of patients for follow-up: a consensus statement of the Spanish Society of Emergency Medicine (SEMES). / Recomendaciones dirigidas a los servicios de urgencias para el diagnóstico precoz de pacientes con sospecha de infección por VIH y su derivación para estudio y seguimiento.

Almost half of new diagnoses of human immunodeficiency virus (HIV) infection are made late, leading to increased morbidity and mortality, greater spread of infection, and higher public health care costs. Emergency services care for many patients who share behaviors associated with HIV transmission risk who arrive in clinical situations that are associated with HIV infection. A strategy to increase the rates of early diagnosis by promoting serology for HIV when caring for patients with certain clinical profiles might therefore be the key to improvement. This approach is hardly used at present, however, unless the result of serology would change the management of the acute complaint that led to the visit. These recommendations based on evidence from a search and review of recent publications were developed by a group of experts appointed by the Spanish Society of Emergency Medicine (SEMES). The resulting statement aims to support decision-making by emergency physicians and promote HIV screening and referral to appropriate specialists for follow-up in patients with certain conditions (sexually transmitted infections, herpes zoster, community-acquired pneumonia) or reporting certain scenarios (practice of chemsex, need for post-exposure prophylaxis). These 6 settings were selected because they are often seen in emergency departments and are common in patients with HIV-positive tests. The recommendations address when to order serology for HIV and how to manage the referral process. Included are decision-making tools for emergency physicians.

Casi la mitad de los nuevos diagnósticos de infección por el virus de la inmunodeficiencia humana (VIH) se realizan de forma tardía, lo cual provoca un aumento en la morbimortalidad, una mayor expansión de la epidemia y un incremento en los costes sanitarios públicos. En los servicios de urgencias se atiende a muchos de los pacientes que presentan situaciones indicadoras de infección por VIH o que comparten su misma vía de transmisión. Por lo tanto, pueden ser clave en una estrategia que mejore las tasas de diagnóstico precoz mediante la promoción de la solicitud de serologías frente al VIH durante la atención de determinados perfiles clínicos. Sin embargo, esto en la actualidad se produce escasamente a no ser que el resultado de la serología vaya a modificar el manejo del proceso agudo que ha motivado la consulta en urgencias. Las presentes recomendaciones se han desarrollado por un grupo de expertos designados por la Sociedad Española de Medicina de Urgencias y Emergencias (SEMES) en base a la identificación y revisión de la evidencia científica más reciente. El objetivo de este documento es dar soporte a los médicos de urgencias en la toma de decisiones, promoviendo el cribado del VIH y la derivación de los pacientes al especialista adecuado para su seguimiento posterior en seis entidades clínicas seleccionadas por su elevada prevalencia en pacientes VIH positivos y la alta frecuencia con la que son atendidas en urgencias: 1) infecciones de transmisión sexual; 2) profilaxis post exposición; 3) herpes zoster; 4) práctica del chemsex; 5) neumonía adquirida en la comunidad, y 6) síndrome mononucleósico. Las recomendaciones incluyen indicaciones sobre en qué pacientes debe realizarse una serología, el proceso de derivación y herramientas para ayudar a los médicos de urgencias en la toma de decisiones.

Molecular study of drought response in the Mediterranean conifer Pinus pinaster Ait.: Differential transcriptomic profiling reveals constitutive water deficit-independent drought tolerance mechanisms.

Adaptation of long-living forest trees to respond to environmental changes is essential to secure their performance under adverse conditions. Water deficit is one of the most significant stress factors determining tree growth and survival. Maritime pine (Pinus pinaster Ait.), the main source of softwood in southwestern Europe, is subjected to recurrent drought periods which, according to climate change predictions for the years to come, will progressively increase in the Mediterranean region. The mechanisms regulating pine adaptive responses to environment are still largely unknown. The aim of this work was to go a step further in understanding the molecular mechanisms underlying maritime pine response to water stress and drought tolerance at the whole plant level. A global transcriptomic profiling of roots, stems, and needles was conducted to analyze the performance of siblings showing contrasted responses to water deficit from an ad hoc designed full-sib family. Although P. pinaster is considered a recalcitrant species for vegetative propagation in adult phase, the analysis was conducted using vegetatively propagated trees exposed to two treatments: well-watered and moderate water stress. The comparative analyses led us to identify organ-specific genes, constitutively expressed as well as differentially expressed when comparing control versus water stress conditions, in drought-sensitive and drought-tolerant genotypes. Different response strategies can point out, with tolerant individuals being pre-adapted for coping with drought by constitutively expressing stress-related genes that are detected only in latter stages on sensitive individuals subjected to drought.

Recomendaciones dirigidas a los servicios de urgencias para el diagnóstico precoz de pacientes con sospecha de infección por VIH y su derivación para estudio y seguimiento / Recommendations for the early diagnosis of suspected human immunodeficiency virus infection in the emergency department and the referral of patients for follow-up: a consensus statement of the Spanish Society of Emergency Medicine (SEMES)

Casi la mitad de los nuevos diagnósticos de infección por el virus de la inmunodeficiencia humana (VIH) se realizan de forma tardía, lo cual provoca un aumento en la morbimortalidad, una mayor expansión de la epidemia y un in-cremento en los costes sanitarios públicos. En los servicios de urgencias se atiende a muchos de los pacientes que presentan situaciones indicadoras de infección por VIH o que comparten su misma vía de transmisión. Por lo tanto, pueden ser clave en una estrategia que mejore las tasas de diagnóstico precoz mediante la promoción de la solicitud de serologías frente al VIH durante la atención de determinados perfiles clínicos. Sin embargo, esto en la actualidad se produce escasamente a no ser que el resultado de la serología vaya a modificar el manejo del proceso agudo que ha motivado la consulta en urgencias. Las presentes recomendaciones se han desarrollado por un grupo de expertos designados por la Sociedad Española de Medicina de Urgencias y Emergencias (SEMES) en base a la identificación y revisión de la evidencia científica más reciente. El objetivo de este documento es dar soporte a los médicos de urgencias en la toma de decisiones, promoviendo el cribado del VIH y la derivación de los pacientes al especialista adecuado para su seguimiento posterior en seis entidades clínicas seleccionadas por su elevada prevalencia en pacientes VIH positivos y la alta frecuencia con la que son atendidas en urgencias: 1) infecciones de transmisión sexual; 2) profilaxis post exposición; 3) herpes zoster; 4) práctica del chemsex; 5) neumonía adquirida en la comunidad, y 6) síndrome mononucleósico. Las recomendaciones incluyen indicaciones sobre en qué pacientes debe realizarse una serología, el proceso de derivación y herramientas para ayudar a los médicos de urgencias en la toma de decisiones

Almost half of new diagnoses of human immunodeficiency virus (HIV) infection are made late, leading to increased morbidity and mortality, greater spread of infection, and higher public health care costs. Emergency services care for many patients who share behaviors associated with HIV transmission risk who arrive in clinical situations that are associated with HIV infection. A strategy to increase the rates of early diagnosis by promoting serology for HIV when caring for patients with certain clinical profiles might therefore be the key to improvement. This approach ishardly used at present, however, unless the result of serology would change the management of the acute complaint that led to the visit. These recommendations based on evidence from a search and review of recent publications were developed by a group of experts appointed by the Spanish Society of Emergency Medicine (SEMES). The resulting statement aims to support decision-making by emergency physicians and promote HIV screening and referral to appropriate specialists for follow-up in patients with certain conditions (sexually transmitted infections, herpes zoster, community-acquired pneumonia) or reporting certain scenarios (practice of chemsex, need for post-exposure prophylaxis). These 6 settings were selected because they are often seen in emergency departments and are common in patients with HIV-positive tests. The recommendations address when to order serology for HIV and how to manage the referral process. Included are decision-making tools foremergency physicians

Initial clinical outcomes and prognostic variables in the implementation of a Code Sepsis in a high complexity University Hospital / Resultados clínicos iniciales y variables pronósticas en la implementación de un Código Sepsis en un Hospital Universitario de alta complejidad

OBJECTIVES: To assess the impact of the first months of application of a Code Sepsis in a high complexity hospital, analyzing patient's epidemiological and clinical characteristics and prognostic factors. MATERIALS AND METHODS: A long-term observational study was carried out throughout a consecutive period of seven months (February 2015 - September 2015). The relationship with mortality of risk factors, and analytic values was analyzed using uni- and multivariate analyses. RESULTS: A total of 237 patients were included. The in-hospital mortality was 24% at 30 days and 27% at 60 days. The mortality of patients admitted to Critical Care Units was 30%. Significant differences were found between the patients who died and those who survived in mean levels of creatinine (2.30 vs 1.46 mg/dL, p <0.05), lactic acid (6.10 vs 2.62 mmol/L, p <0.05) and procalcitonin (23.27 vs 12.73 mg/dL, p < 0.05). A statistically significant linear trend was found between SOFA scale rating and mortality (p < 0.05). In the multivariate analysis additional independent risk factors associated with death were identified: age > 65 years (OR 5.33, p <0.05), lactic acid > 3 mmol/L (OR 5,85, p <0,05), creatinine > 1,2 mgr /dL (OR 4,54, p <0,05) and shock (OR 6,57, P <0,05). CONCLUSIONS: The epidemiological, clinical and mortality characteristics of the patients in our series are similar to the best published in the literature. The study has identified several markers that could be useful at a local level to estimate risk of death in septic patients. Studies like this one are necessary to make improvements in the Code Sepsis programs

OBJETIVO: Evaluar el impacto de un programa educativo y organizativo llamado Código Sepsis, en los primeros siete meses de su aplicación en un hospital de alta complejidad. MATERIAL Y MÉTODOS: Se realizó un estudio observacional durante un período consecutivo de siete meses (Febrero 2015-Septiembre 2015). Se analizó la relación con la mortalidad de los factores de riesgo y los valores analíticos usando análisis uni y multivariante. RESULTADOS: Se incluyeron un total de 237 pacientes. La mortalidad intrahospitalaria a los 30 días fue del 24 % y del 27% a los 60 días. La mortalidad de los pacientes ingresados en Unidades de Cuidados Críticos fue del 30%. Se encontraron diferencias significativas entre los pacientes que murieron y los que sobrevivieron en sus valores medios de creatinina (2,30 vs 1,46 mg/dL, p <0,05), ácido láctico (6,10 vs 2,62 mmol/L, p <0,05) y procalcitonina (23,27 vs 12,73 mg/dL, p <0,05). Se encontró una tendencia lineal estadísticamente significativa entre los valores de la escala SOFA y la mortalidad (p <0,05). En el análisis multivariante se identificaron otros factores de riesgo independientes asociados con la muerte: edad > 65 años (OR 5,33, p <0,05), ácido láctico > 3 mmol/L (OR 5,85, p <0,05), creatinina > 1,2 mgr/dL (OR 4,54, p <0,05) y el shock (OR 6,57, P <0,05). CONCLUSIONES: La mortalidad en este estudio se encuentra dentro de los límites de los ensayos clínicos más recientes de sepsis. El estudio ha identificado varios marcadores que podrían ser útiles a nivel local para estimar el riesgo en pacientes sépticos. Estudios como éste son necesarios para hacer mejoras en los programas de Código Sepsis

terratenientes de Cochabamba

Los terratienientes de Cochabamba examina la situación de los actores sociales dominantes en la estructura agraria desde principios del siglo XX. La investigación sitúa a los aristócratas propietarios de la tierra en el marco de una compleja y crítica situación de la economía cochabambina sometida a determinismos climáticos y ausencia de infraestructura caminera. Junto a un abanico de propietarios mestizos e indígenas que poseian diferente grado de poder, mantuvieron un injusto orden social explotador y discriminatorio que no podia perdurar. La reforma agraria de 1953 transformó rápida y masivamente la estructura de propiedad de la tierra desplazando definitivamente del poder regional a una clase que se había acostumbrado a vivir a expensas de la servidumbre indígena sin proyectarse como una fuerza renovadora y de cambio económico social y cultural