Gold(III) Auracycles featuring C(sp3)-Au-C(sp2) Bonds: Synthesis and Mechanistic Insights into the Cycloauration Step.

The direct auration of arenes is a key step in numerous gold-catalyzed reactions. Although reported more than 100 years ago, understanding of its underlying mechanism has been hampered by the difficulties in the isolation of relevant intermediates given the propensity of gold(III) species to undergo reductive elimination. Here, we report the synthesis and isolation of a new family of intriguing zwitterionic [C(sp3)^C(sp2)]-auracyclopentanes, as well as of their alkyl-gold(III) precursors and demonstrate their value as mechanistic probes to study the Csp2-Au bond-forming event. Experimental investigations employing Kinetic Isotope Effects (KIE), Hammett plot, and Eyring analysis provided important insights into the formation of the auracycle. The data suggest a SEAr mechanism wherein the slowest step might be the p-coordination between the arene and the gold(III) center, en route to the Wheland intermediate. We also show that these auracyclopentanes can work as catalysts in several gold-promoted transformations.

Response of the toxic dinoflagellate Alexandrium minutum to exudates of the eelgrass Zostera marina.

Biotic interactions are a key factor in the development of harmful algal blooms. Recently, a lower abundance of planktonic dinoflagellates has been reported in areas dominated by seagrass beds, suggesting a negative interaction between both groups of organisms. The interaction between planktonic dinoflagellates and marine phanerogams, as well as the way in which bacteria can affect this interaction, was studied in two experiments using a non-axenic culture of the toxic dinoflagellate Alexandrium minutum exposed to increasing additions of eelgrass (Zostera marina) exudates from old and young leaves and to the presence or absence of antibiotics. In these experiments, A. minutum abundance, growth rate and photosynthetic efficiency (Fv/Fm), as well as bacterial abundance, were measured every 48 h. Toxin concentration per cell was determined at the end of both experiments. Our results demonstrated that Z. marina exudates reduced A. minutum growth rate and, in one of the experiments, also the photosynthetic efficiency. These results are not an indirect effect mediated by the bacteria in the culture, although their growth modify the magnitude of the negative impact on the dinoflagellate growth rate. No clear pattern was observed in the variation of toxin production with the treatments.

A Collaborative Platform for Advancing Automatic Interpretation in ECG Signals.

Numerous papers report the efficiency of the automatic interpretation capabilities of commercial algorithms. Unfortunately, these algorithms are proprietary, and academia has no means of directly contributing to these results. In fact, nothing at the same stage of development exists in academia. Despite the extensive research in ECG signal processing, from signal conditioning to expert systems, a cohesive single application for clinical use is not ready yet. This is due to a serious lack of coordination in the academic efforts, which involve not only algorithms for signal processing, but also the signal acquisition equipment itself. For instance, the different sampling rates and the different noise levels frequently found in the available signal databases can cause severe incompatibility problems when the integration of different algorithms is desired. Therefore, this work aims to solve this incompatibility problem by providing the academic community with a diagnostic-grade electrocardiograph. The intention is to create a new standardized ECG signals database in order to address the automatic interpretation problem and create an electrocardiography system that can fully assist clinical practitioners, as the proprietary systems do. Achieving this objective is expected through an open and coordinated collaboration platform for which a webpage has already been created.

Treatment of distal third humeral shaft fractures with posterior minimally invasive plate osteosynthesis (MIPO) with segmental isolation of the radial nerve: minimum one-year follow-up.

Background: Open reduction and internal fixation with plate is one of the most widely used treatments for distal third humeral shaft fractures. The purpose of this study was to report the outcomes of the treatment of distal third humeral shaft fractures with posterior minimally invasive plate osteosynthesis (MIPO) with segmental isolation of the radial nerve. Methods: We performed an observational, retrospective, consecutive, monocentric, continuous multioperator study. We reviewed 22 distal third humeral shaft fractures treated with posterior MIPO in our institution with an extra-articular distal humerus plate from 2018 to 2021. Inclusion was limited to functionally independent patients with displaced fractures involving the junction of the middle and distal thirds of the humerus and minimum 12-month follow-up for implant removal. We assessed clinical outcomes including range of motion; QuickDASH score; Mayo Elbow Performance Score; and Constant-Murley score. Results: The average follow-up period of the sample was 31.7 ± 11.6 months (range, 15.7-51.3 months). The average elbow flexion and extension were 146.4° ± 7.3° (range, 120°-150°) and -0.7° ± 3.3° (range, -15° to 0°), respectively. The average shoulder anterior flexion, elevation, and abduction were 178.6° ± 3.6° (range, 170°-180°), 179.1° ± 2.9° (range, 170°-180°), and 140.9° ± 14.8° (range, 110°-160°), respectively. The average external rotation was 88.6° ± 6.4 (range, 65°-90°). The mean visual analog scale score for pain was 1.0 ± 1.6 (range, 0-5) and the mean Mayo Elbow Performance Score was 90.5 ± 9.9 (range, 70-100). The mean QuickDASH and Constant-Murley scores were 4.7 ± 6.8 (range, 0-20.5) and 95.5 ± 5.1 (range, 81-100), respectively. Two patients presented with relevant compromise of radial nerve motor function postoperatively (M3 and M2; the more compromised was preoperative injury). All patients recovered radial nerve neuropraxia within six weeks postoperatively. All fractures achieved union. The average anteroposterior and lateral axis were 175.0 ± 3.6 (168.0°-180.0°) and 177.5 ± 2.0 (173.0°-180.0°), respectively. No superficial or deep infection was reported. No cases of re-displacement of fracture, implant failure, or any other implant-related complication in follow-up were reported. No patient required plate withdrawal. Conclusion: The results of this study demonstrate that the posterior MIPO technique is a reliable option for treating distal third shaft humeral fractures. The radial nerve must be identified and protected in all cases to prevent palsy.

Impact of wildfire ash on bacterioplankton abundance and community composition in a coastal embayment (Ría de Vigo, NW Spain).

Wildfire ash can have an impact on coastal prokaryotic plankton. To understand the extent to which community composition and abundance of coastal prokaryotes are affected by ash, two ash addition experiments were performed. Ash from a massive wildfire that took place in the Ría de Vigo watershed in October 2017 was added to natural surface water samples collected in the middle sector of the ría during the summer of 2019 and winter of 2020, and incubated for 72 h, under natural water temperature and irradiance conditions. Plankton responses were assessed through chlorophyll a and bacterial abundance measurements. Prokaryotic DNA was analyzed using 16S rRNA gene partial sequencing. In summer, when nutrient concentrations were low in the ría, the addition of ash led to an increase in phytoplankton and bacterial abundance, increasing the proportions of Alteromonadales, Flavobacteriales, and the potentially pathogenic Vibrio, among other taxa. After the winter runoff events, nutrient concentrations in the Ría de Vigo were high, and only minor changes in bacterial abundance were detected. Our findings suggest that the compounds associated with wildfire ash can alter the composition of bacterioplanktonic communities, which is relevant information for the management of coastal ecosystems in fire-prone areas.

Contrastsing synaptic roles of MDGA1 and MDGA2.

Neurodevelopmental disorders are frequently linked to mutations in synaptic organizing molecules. MAM domain containing glycosylphosphatidylinositol anchor 1 and 2 (MDGA1 and MDGA2) are a family of synaptic organizers suggested to play an unusual role as synaptic repressors, but studies offer conflicting evidence for their localization. Using epitope-tagged MDGA1 and MDGA2 knock-in mice, we found that native MDGAs are expressed throughout the brain, peaking early in postnatal development. Surprisingly, endogenous MDGA1 was enriched at excitatory, but not inhibitory, synapses. Both shRNA knockdown and CRISPR/Cas9 knockout of MDGA1 resulted in cell-autonomous, specific impairment of AMPA receptor-mediated synaptic transmission, without affecting GABAergic transmission. Conversely, MDGA2 knockdown/knockout selectively depressed NMDA receptor-mediated transmission but enhanced inhibitory transmission. Our results establish that MDGA2 acts as a synaptic repressor, but only at inhibitory synapses, whereas both MDGAs are required for excitatory transmission. This nonoverlapping division of labor between two highly conserved synaptic proteins is unprecedented.

Contribution of nursing students to clinical settings: A multi center cross sectional study.

AIMS: To describe the contribution of nursing students to clinical settings based on the perceptions of nurse preceptors and to examine whether certain characteristics of nurses' professional activity are associated with a positive perception of nursing students. BACKGROUND: Most clinical agencies receive many nursing students each year, who acquire clinical competencies under the guidance of a registered nurse preceptor. However, there is limited evidence of the contributions made by nursing students during clinical placements. METHODS: A multi-center cross-sectional study was carried out between June and December 2019. A convenience sample of Registered Nurses (n = 927) was recruited from four public hospitals in Spain. The Nursing Student Contributions to Clinical Settings' questionnaire was used. In addition, sociodemographic, work and teaching activity variables were collected. Multivariable logistic regression was used to determine the variables associated with positive student contributions. RESULTS: The nursing student contributions were deemed favorable by 70.7% of the nurse preceptors, mainly because the nursing students are future professionals who know the center, support the development of the nurses' teaching role and constitute a link between the health center and the university. Certain professional characteristics of the Registered Nurses were significantly associated with a positive perception of the contributions of nursing students: having daily coffee breaks (Odds ratio: 2.60; 95% Confidence interval:1.27-5.32), high levels of professional satisfaction (Odds ratio: 2.13; 95% Confidence interval:1.21-3.75) and work in medical-surgical units (Odds ratio: 1.62; 95% Confidence interval: 1.08-2.41). In contrast, nurses with greater work experience (≥ 30 years) (Odds ratio: 0.48; 95% Confidence interval: 0.27-0.85) and who worked at units where 10 or more students perform clinical practice (Odds ratio: 0.57; 95% Confidence interval: 0.36-0.90) were associated with a lower probability of positive perceptions. CONCLUSIONS: In Spain, the contributions made by nursing students to clinical settings are favorable, both for the nursing profession and for healthcare institutions. Their contributions are influenced by the professional characteristics of the Registered Nurses, as well as the environment and the teaching activity within the units.

Is the Sars-CoV-2 virus a possible trigger agent for the development of achalasia?

BACKGROUND: Achalasia is an autoimmune disease whose probable causal agent is a neurotropic virus that chronically infects the myenteric plexus of the esophagus and induces the disease in a genetically susceptible host. The association between achalasia and coronaviruses has not been reported. AIMS: To evaluate the presence of the SARS-CoV-2 virus, the ACE2 expression, the tissue architecture, and immune response in the lower esophageal sphincter muscle (LESm) of achalasia patients who posteriorly had SARS-CoV-2 (achalasia-COVID-19) infection before laparoscopic Heller myotomy (LHM) and compare the findings with type II achalasia patients and transplant donors (controls) without COVID-19. METHODS: The LESm of 7 achalasia-COVID-19 patients (diagnosed by PCR), ten achalasia patients, and ten controls without COVID-19 were included. The presence of the virus was evaluated by in situ PCR and immunohistochemistry. ACE2 receptor expression and effector CD4 T cell and regulatory subsets were determined by immunohistochemistry. KEY RESULTS: Coronavirus was detected in 6/7 patients-COVID-19. The SARS-CoV-2 was undetectable in the LESm of the achalasia patients and controls. ACE2 receptor was expressed in all the patients and controls. One patient developed achalasia type II post-COVID-19. The percentage of Th22/Th17/Th1/pDCreg was higher in achalasia and achalasia-COVID-19 pre-HLM vs. controls. The Th2/Treg/Breg cell percentages were higher only in achalasia vs. controls. CONCLUSION & INFERENCES: SARS-CoV2 and its receptor expression in the LESm of achalasia patients who posteriorly had COVID-19 but not in the controls suggests that it could affect the myenteric plexus. Unlike achalasia, patients-COVID-19 have an imbalance between effector CD4 T cells and the regulatory mechanisms.

Prenatal and Birth Care of Roma Women.

BACKGROUND: The reproductive health of Roma women has been poorly studied. It is important to determine the follow-up care received by Roma women from pregnancy to the first postpartum visit, together with neonatal outcomes, to improve prenatal care and maternal-child outcomes. OBJECTIVE: The aim of this study was to examine differences in prenatal care and maternal-infant outcomes between Roma and non-Roma women. METHODS: A retrospective longitudinal study was conducted in 122 pregnant women (28 Roma and 94 non-Roma women) recruited from seven primary care centers in three districts of Asturias (Spain). Sociodemographic variables, prenatal control, birth characteristics, feeding, and neonatal outcomes (gestational age, weight, and APGAR [appearance, pulse, grimace, activity, and respiration]) were collected from the electronic medical records. Prenatal care was assessed using three indices: the Kessner index, the Modified Adequacy of Prenatal Care Utilization Spanish Index, and an ad hoc index that considered adherence to the recommendations for pregnant women in Spain. RESULTS: Compared with non-Roma women, advanced maternal age (≥35 years) and primigravida were less common among Roma women. Roma women visited the dentist less often, smoked more, and underwent group B streptococcus screening less frequently. No differences were found in the number of prenatal visits between Roma and non-Roma women. Consequently, there were no differences between the Kessner index and the Modified Adequacy of Prenatal Care Utilization Spanish Index. Using the ad hoc index, the non-Roma women more frequently had adequate prenatal visits. There were no differences in birth characteristics, type of feeding, and neonatal outcomes. DISCUSSION: Overall, prenatal care was slightly worse in Roma women; however, this did not imply worse neonatal health outcomes. Both study groups had similar birth characteristics and immediate puerperium, including feeding.

Vivencias e impacto en la calidad de vida de personas con COVID persistente / Experiences and impact on the quality of life of people with long COVID

Objetivo: Explorar las vivencias de las personas con COVID persistente en el País Vasco transcurrido más de 1 año desde el inicio de la pandemia, con el fin de comprender su impacto en la salud y en el ámbito social, así como detectar posibles áreas de mejora en la asistencia que reciben estas personas con el fin de desarrollar programas de salud que apoyen su recuperación. Método: Estudio cualitativo fenomenológico. Como técnica de recogida de datos se realizaron entrevistas en profundidad hasta la saturación del discurso. Se incluyeron pacientes mayores de edad con sintomatología de COVID persistente con un tiempo de evolución mayor de 12 semanas. El contacto con los/las pacientes se realizó a través del Colectivo COVID Persistente de Euskadi. Las entrevistas se realizaron y grabaron con la aplicación ZOOM. Se realizó una trascripción literal de las entrevistas y posteriormente un análisis temático, identificando las primeras unidades de significado y asignando códigos que se agruparon después en las diferentes categorías. Resultados: Participaron 20 pacientes. Del análisis de los discursos emergieron tres categorías principales: 1) afectación/impacto en la calidad de vida de los/las pacientes; 2) detección de mejoras en la asistencia sanitaria; y 3) aspectos que reconfortan. Conclusiones: Este estudio evidencia el importante impacto en la calidad de vida que sufren estas personas. Es necesario diseñar políticas sanitarias que favorezcan el abordaje personalizado, integral y multidisciplinario de tales pacientes. (AU)

Objective: To explore the experiences of people with persistent COVID in the Basque Country more than a year after the start of the pandemic, in order to understand the health and social impact it has, as well as to detect possible areas for improvement in the care that these people receive in order to develop health programms to support their recovery. Method: Qualitative phenomenological study. In-depth interviews will be carried out as a data collection technique until saturation of the discourse. Patients of legal age who present persistent COVID symptomatology with an evolution time of more than 12 weeks were included. Contact with the patients was made through the Basque Long COVID Collective. The interviews were carried out and recorded through the ZOOM application. After the literal transcription of the interviews, the thematic analysis will be carried out, identifying the first units of meaning and assigning codes that will later be grouped into the different categories. Results: 20 patients participated. A total of three main categories emerged from the analysis of the discourses: 1) affecting/impacting patients’ quality of life; 2) identifying improvements in healthcare; and 3) comforting aspects. Conclusions: This study shows the significant impact on the quality of life suffered by these people. It is necessary to design health policies that favour a personalised, comprehensive and multidisciplinary approach to these patients. (AU)

Influencia de la carga alélica del JAK2V617F en pacientes cubanos con trombocitemia esencial y mielofibrosis primaria / Influence of JAK2V617F allelic burden in Cuban patients with essential thrombocythemia and primary myelofibrosis

Introducción: La frecuencia de la mutación JAK2V617F se estima entre el 50 y 60 por ciento en pacientes con trombocitemia esencial y mielofibrosis primaria. El 30 por ciento de los pacientes con policitemia vera y mielofibrosis primaria. Entre 2-4 por ciento de los pacientes con trombocitemia esencial presentan pérdida de heterocigosidad. Objetivos: Evaluar la influencia de la carga alélica de la mutación JAK2V617F y su relación con variables clínico-hematológicas en el diagnóstico de estas enfermedades en pacientes cubanos. Métodos: Se realizó un estudio retrospectivo, descriptivo y longitudinal en el Instituto de Hematología e Inmunología entre 2010 y 2020. Se incluyeron todos los pacientes con sospecha de trombocitemia esencial y mielofibrosis primaria con muestras de ADN válidas. Se les cuantificó la carga alélica de la mutación por PCR en tiempo real. Resultados: Se detectó la mutación en 66,7 por ciento de los diagnosticados con trombocitemia esencial y mielofibrosis primaria. El 62,5 por ciento de los pacientes con mielofibrosis primaria fueron homocigotos a la mutación, mientras que en la trombocitemia esencial solo el 20,8 por ciento. La diferencia de medias de cargas alélicas entre ambas enfermedades fue estadísticamente significativa. No se encontraron diferencias significativas en la comparación de las variables clínicas y hematológicas en estas enfermedades ni asociación con la carga alélica con excepción de las plaquetas en la mielofibrosis primaria. Conclusiones: El estudio estuvo limitado por la escasa muestra de pacientes, pero se corresponde con otras investigaciones que sostienen el concepto de que la presentación fenotípica de las neoplasias mieloproliferativasestá influenciada por la carga mutacional del JAK2V617F(AU)

Introduction: The frequency of the JAK2V617F mutation is estimated to be between 50 percent and 60 percent in patients with essential thrombocythemia and primary myelofibrosis. 30 percent of patients with polycythemia vera and primary myelofibrosis and 2-4 percent of patients with essential thrombocythemia show loss of heterozygosity. Objectives: To evaluate the influence of the allelic load of the JAK2V617F mutation in the diagnosis of these diseases in Cuban patients and its relationship with clinical-hematological variables. Methodology: A retrospective, descriptive and longitudinal study was carried out at the Institute of Hematology and Immunology between 2010 and 2020. All patients with suspected essential thrombocythemia and primary myelofibrosis with valid DNA samples were included. The allelic load of the mutation was quantified by real-time PCR. Results: The mutation was detected in 66.7 percent of those diagnosed with essential thrombocythemia and primary myelofibrosis. 62.5 percent of the patients with primary myelofibrosis were homozygous for the mutation, while in essential thrombocythemia only 20.8 percent. The difference in mean allelic loads between both diseases was statistically significant. No significant differences were found in the comparison of clinical and hematological variables in these diseases or association with allelic load, with the exception of platelets in primary myelofibrosis. Conclusions: The study was limited by the small sample of patients, but it corresponds to other investigations that support the concept that the phenotypic presentation of myeloproliferative neoplasms is influenced by the mutational load of JAK2V617F(AU)

Contributions of nursing students during their clinical practice in primary care: Adaptation and validation of a scale.

AIM: To adapt the 'Nursing Student Contributions to Clinical Settings' scale (CEEEC, Spanish acronym), designed for specialized care and to evaluate the validity and reliability of a measure in the primary health care setting. Additionally, a description of the contributions of nursing students to primary health care in Spain is presented, based on the perception of preceptor nurses. METHODS: A multicenter cross-sectional study was conducted in Spain, involving a committee of nursing experts who participated in a Delphi panel (n = 5) and cognitive interviews (n = 5) and a sample of nursing preceptors (n = 300) from 57 primary health care centers (2019-2020). The CEEEC was reviewed by experts for the conceptual semantic adequacy of the 24 items for its application in primary health care. Nurse preceptors' responses to the CEEEC scale were used to study the validity and reliability of the measure, including factor analysis, convergent validity with the Health Sciences-Evidence Based Practice scale and a matched test-retest over a three-week interval. RESULTS: According to the consensus of experts, the CEEEC scale is valid for primary health care with minimal modifications (change "patient" to "user"). Based on the analysis of responses to the scale, the corrected item-total correlations of the 24 items were ≥ 0.40 and were grouped into a single factor, explaining 46.3% of the variance. The Cronbach's alpha value was 0.95. Regarding convergent validity, there was a positive correlation between the CEEEC scale and the score of the Health Sciences-Evidence Based Practice scale (Pearson's coefficient= 0.33; p < 0.001). The overall intraclass correlation coefficient was 0.91. Finally, the mean CEEEC score was 61.9 points (range 0-96). The two most positive contributions were 'Nursing students enable nursing professionals to perform their teaching role' and 'Nursing students become future professionals who know the healthcare facility'. CONCLUSIONS: The CEEEC scale provides a valid and reliable measure of nursing students' contributions to primary health care. Nursing students' contributions to Spanish primary health care were positive, especially towards the nursing profession and healthcare organizations.

Long-term potentiation reconstituted with an artificial TARP/PSD-95 complex.

The critical role of AMPA receptor (AMPAR) trafficking in long-term potentiation (LTP) of excitatory synaptic transmission is now well established, but the underlying molecular mechanism is still uncertain. Recent research suggests that PSD-95 captures AMPARs via an interaction with the AMPAR auxiliary subunits-transmembrane AMPAR regulatory proteins (TARPs). To determine if such interaction is a core minimal component of the AMPAR trafficking and LTP mechanism, we engineered artificial binding partners, which individually were biochemically and functionally dead but which, when expressed together, rescue binding and both basal synaptic transmission and LTP. These findings establish the TARP/PSD-95 complex as an essential interaction underlying AMPAR trafficking and LTP.

[Experiences and impact on the quality of life of people with long COVID]. / Vivencias e impacto en la calidad de vida de personas con COVID persistente.

OBJECTIVE: To explore the experiences of people with persistent COVID in the Basque Country more than a year after the start of the pandemic, in order to understand the health and social impact it has, as well as to detect possible areas for improvement in the care that these people receive in order to develop health programms to support their recovery. METHOD: Qualitative phenomenological study. In-depth interviews will be carried out as a data collection technique until saturation of the discourse. Patients of legal age who present persistent COVID symptomatology with an evolution time of more than 12 weeks were included. Contact with the patients was made through the Basque Long COVID Collective. The interviews were carried out and recorded through the ZOOM application. After the literal transcription of the interviews, the thematic analysis will be carried out, identifying the first units of meaning and assigning codes that will later be grouped into the different categories. RESULTS: 20 patients participated. A total of three main categories emerged from the analysis of the discourses: 1) affecting/impacting patients' quality of life; 2) identifying improvements in healthcare; and 3) comforting aspects. CONCLUSIONS: This study shows the significant impact on the quality of life suffered by these people. It is necessary to design health policies that favour a personalised, comprehensive and multidisciplinary approach to these patients.

Predictive factors associated with the persistence of chest pain in post-laparoscopic myotomy and fundoplication in patients with achalasia.

Background: Episodic angina-like retrosternal pain is a prevalent symptom for achalasia patients pre- and post-treatment. The cause of postoperative chest pain remains poorly understood. Moreover, there are no reports on their predictive value for chest pain in the long-term post-treatment. The effect of laparoscopic Heller myotomy (LHM) and fundoplication techniques (Dor vs. Toupet) is unclear. Methods: We analyzed a cohort of 129 achalasia cases treated with LHM and randomly assigned fundoplication technique. All the patients were diagnosed with achalasia by high-resolution manometry (HRM). Patients were followed up at 1-, 6-, 12-, and 24-month post-treatment. We implemented unadjusted and adjusted logistic regression analyses to evaluate the predictive significance of pre- and post-operative clinical factors. Results: Preoperative chest pain with every meal was associated with an increased risk of occasional postoperative chest pain [unadjusted model: odds ratio (OR) = 12, 95% CI: 2.2-63.9, P = 0.006; adjusted model: OR = 26, 95% CI: 2.6-259.1, P = 0.005]. In type II achalasia, hypercontraction was also associated with an increased risk of chest pain (unadjusted model: OR = 2.6 e9 in all the patients). No significant differences were associated with age, type of achalasia, dysphagia, esophageal shape, and integrated relaxation pressure (IRP) with an increased risk of occasional postoperative chest pain. Also, there was no significant difference between fundoplication techniques or surgical approaches (e.g., length of myotomy). Conclusion: Preoperative chest pain with every meal was associated with a higher risk of occasionally postoperative chest pain.

¿Es importante conocer el tipo de transcripto BCR-ABL en la leucemia mieloide crónica? / Is it important to know the type of BCR-ABL transcript in chronic myeloid leukemia?

La leucemia mieloide crónica se caracteriza por la ocurrencia de una translocación recíproca entre los cromosomas 9 y 22; que da origen a un cromosoma 22 derivativo conocido como Filadelfia. En el sitio de unión se forma el gen de fusión BCR-ABL que conlleva a la síntesis de una proteína híbridacon propiedades oncogénicas. El sitio de unión entre los cromosomas 9 y 22 es variable y da lugar a transcritos diferentes; los conocidos como e13a2 y e14a2 son los más frecuentes y estudiados. El análisis de las características clínico-hematológicas de presentación y la respuesta al tratamiento entre los pacientes portadores de e13a2 o e14a2 ha revelado diferencias que pueden ser útiles para la predicción del pronóstico. Se realizó una revisión de la literatura científica a través de PUBMED. Se analizó y resumió la información. Se evidencian diferentes características de presentación, pero no existe coincidencia entre todos los autores. Respecto al comportamiento de la respuesta al tratamiento con inhibidores de tirosina quinasa, algunos autores encuentran diferencias y algunos sugieren que puede tratarse de dos enfermedades diferentes. Puede ser importante conocer el tipo de transcripto BCR-ABL en la LMC ya que, al menos entre los dos más frecuentes, existen diferencias que pueden ser útiles en la predicción del pronóstico para el paciente, así como para el manejo del tratamiento(AU)

Chronic myeloid leukemia is characterized by the occurrence of a reciprocal translocation between chromosomes 9 and 22; which gives rise to a derivative chromosome 22 known as Philadelphia. At the binding site, the BCR-ABL fusion gene is formed, which leads to the synthesis of a hybrid protein with oncogenic properties. The binding site between chromosomes 9 and 22 is variable and gives rise to different transcripts; those known as e13a2 and e14a2 are the most frequent and studied. The analysis of the clinical-hematological characteristics of presentation and the response to treatment among patients with e13a2 or e14a2 has revealed differences that may be useful for the prediction of prognosis. To describe the different characteristics reported for one or another transcript and to know if it is important to know the type of transcript in the CML. A review of the scientific literature was carried out through PUBMED. The information was analyzed and summarized. Different presentation characteristics are evident but there is no coincidence between all the authors. Regarding the behavior of the response to treatment with tyrosine kinase inhibitors, some authors find differences and some suggest that it may be two different entities. It may be important to know the type of BCR-ABL transcript in CML cause, at least between the two most frequent, there are differences that may be useful in predicting the prognosis for the patient as well as for the management of treatment(AU)

Synaptic memory requires CaMKII.

Long-term potentiation (LTP) is arguably the most compelling cellular model for learning and memory. While the mechanisms underlying the induction of LTP ('learning') are well understood, the maintenance of LTP ('memory') has remained contentious over the last 20 years. Here, we find that Ca2+-calmodulin-dependent kinase II (CaMKII) contributes to synaptic transmission and is required LTP maintenance. Acute inhibition of CaMKII erases LTP and transient inhibition of CaMKII enhances subsequent LTP. These findings strongly support the role of CaMKII as a molecular storage device.

How the brain stores information is a question that has fascinated neuroscientists for well over a century. Two general ideas have emerged. The first is that groups of neurons hold information by staying active. The second is that they hold information by strengthening their connections to one another, making it easier for them to work together in the future. Scientists call this second idea 'long-term potentiation'. One of the molecules involved in long-term potentiation is a protein called calcium-calmodulin-dependent kinase II, or CaMKII for short. Blocking CaMKII, or deleting its gene, stops the connections between neurons from becoming stronger. This suggests neurons need CaMKII to learn, but it remains unclear whether neurons also use CaMKII to maintain neuronal memories after they have been created. If CaMKII does play a role in maintaining memories, blocking it after learning should reverse the learning process, but so far, experiments have not been able to show this. Tao et al. revisited these experiments to find out more. They examined slices of brain tissue from mice that had been treated with fast-acting CaMKII inhibitors. It took tens of minutes, but the inhibitors were able to reverse long-term potentiation, both for newly acquired neuronal memories and for older memories that had formed when the mice were alive. The choice of CaMKII inhibitor and the time lag could explain why scientists have not observed the effect before. Understanding long-term potentiation is a fundamental part of understanding learning and memory. It could also reveal more about the opposite phenomenon: long-term depression. This is a type of learning where the connections between neurons become weaker. Long-term depression also takes tens of minutes to occur, suggesting that future research into CaMKII might shed light on how it works.

Limitación auditiva y fragilidad social en hombres y mujeres mayores / Hearing loss and social frailty in older men and women

Objetivo: Explorar la asociación entre la limitación auditiva y la fragilidad social en una muestra de personas mayores de España. Método: Estudio transversal con una muestra de 445 personas (190 hombres y 255 mujeres) de 65 y más años de edad no institucionalizadas, reclutadas de centros de atención primaria en España. La limitación auditiva se determinó de forma autoinformada utilizando tres preguntas. Se consideró que existía fragilidad social cuando la persona presentó dos o más de las siguientes condiciones: vivir solo/a, ausencia de persona que brinde ayuda, contacto infrecuente con la familia, contacto infrecuente con amistades, falta de confidente y falta de ayuda para las actividades cotidianas en los últimos 3 meses. Para estudiar la asociación entre la limitación auditiva y la fragilidad social se realizaron modelos de regresión logística ajustados por posibles factores de confusión, incluyendo la presencia de fragilidad física. Resultados: La edad media de los/las participantes fue de 76,2 años (77,5 años para las mujeres). El 54,4% presentaban limitación auditiva y el 23,2% fueron considerados/as frágiles sociales. La limitación auditiva se asoció con la fragilidad social ( odds ratio ajustada [ORa]=1,78; intervalo de confianza del 95% [IC95%]: 1,043,06). No obstante, la asociación fue dependiente del sexo (p de interacción=0,041) y en los análisis estratificados la asociación solo se halló en las mujeres (ORa=3,21; IC95%: 1,447,17).Conclusiones: La limitación auditiva se asoció con fragilidad social en las mujeres, pero no en los hombres. Se precisan estudios longitudinales que confirmen esta asociación y ayuden a entender el efecto diferencial del sexo. (AU)

Objective: To explore the association between hearing loss and social frailty in a sample of Spanish older adults recruited from primary health care network.Method: Crosssectional study on a sample of 445 noninstitutionalized adults aged 65 or more years (190 men and 255 women), recruited from primary care centers in Spain. Three selfreported hearing impairment questions were used to assess hearing loss. Social frailty was deemed to exist when the person presented two or more of the following conditions: living alone, absence of a person to provide help, infrequent contact with family, infrequent contact with friends, lack of confident and lack of help for daily activities in the last 3 months. To study the association between hearing loss and social frailty we used logistic regression models adjusted for potential confounders, including physical frailty. Results: The mean age of participants was 76.2 years (77.5 years for women). More than half of the participants (54.4%) reported hearing loss and the frequency of social frailty was 23.2%. Hearing loss was associated with social frailty (adjusted odds ratio [aOR]=1.78; 95% confidence interval [95%CI]: 1.043.06). However, the association was sexdependent (p for interaction=0.041). In stratified analysis, the association was only found in women (aOR=3.21; 95%CI: 1.447.17). Conclusions: Hearing loss was associated with social frailty in women, but not in men. Longitudinal studies are needed to confirm this association and to understand the differential effect of gender. (AU)