Qigong for the Emotional Exhaustion in Nurses: Implications of a Prospective Randomized Controlled Trial in the COVID-19 Pandemic.

Introduction: Burnout is commonly understood as resulting from chronic stress at work. It may have several consequences for the well-being and health of the worker. As a dimension of burnout, emotional exhaustion appears to be predicted mostly by work overload, interpersonal conflicts, and the inadequate use of skills. Emotional exhaustion is considered to be the affective component of burnout and may cause depersonalization. Burnout seems to be highly prevalent among nurses and more so during the COVID-19 pandemic. To address the new demands that the pandemic has placed on health care systems, nurses must be provided specific training in stress coping techniques. Qigong is an applied psychophysiological feedback technique that can be done independently by the practitioner; it enables the user to learn how to control their bodily functions and processes. As such, the objective of this study is to understand if qigong can be used as a complementary therapy for emotional exhaustion in nurses and if it can be implemented during critical events such as the COVID-19 pandemic. Method: A total of 44 nurses aged between 27 and 54 years (90.9% female), with high levels of emotional exhaustion, were randomized into intervention and control groups. The "white ball" system of qigong, led by a traditional Chinese medicine specialist, was taught to participants in the intervention group for 4 weeks. After this period, participants had 4 weeks for self-practice. The Maslach Burnout Inventory was used to capture the nurses' level of emotional exhaustion at the beginning and end of the experimental period, as well as after the 4-week self-practice period. Results: The results showed that 70% of the participants in the intervention group had significantly decreased emotional exhaustion levels, which reduced from high to either moderate (55%) or low (15%) after the experimental phase. Moreover, these benefits were maintained after the 4 weeks of self practice. Conclusion: The results of this study suggest that qigong may be used as a complementary tool to mitigate burnout (including that induced by COVID-19) among nurses, thus improving health care services and capacity.

Crosslinking activity of non-muscle myosin II is not sufficient for embryonic cytokinesis in C. elegans.

Cytokinesis in animal cells requires the assembly and constriction of a contractile actomyosin ring. Non-muscle myosin II is essential for cytokinesis, but the role of its motor activity remains unclear. Here, we examine cytokinesis in C. elegans embryos expressing non-muscle myosin motor mutants generated by genome editing. Two non-muscle motor-dead myosins capable of binding F-actin do not support cytokinesis in the one-cell embryo, and two partially motor-impaired myosins delay cytokinesis and render rings more sensitive to reduced myosin levels. Further analysis of myosin mutants suggests that it is myosin motor activity, and not the ability of myosin to crosslink F-actin, that drives the alignment and compaction of F-actin bundles during contractile ring assembly, and that myosin motor activity sets the pace of contractile ring constriction. We conclude that myosin motor activity is required at all stages of cytokinesis. Finally, characterization of the corresponding motor mutations in C. elegans major muscle myosin shows that motor activity is required for muscle contraction but is dispensable for F-actin organization in adult muscles.This article has an associated 'The people behind the papers' interview.

Antinociceptive and anti-inflammatory effects of a lectin-like substance from Clitoria fairchildiana R. Howard seeds.

Lectins are proteins that have the ability to bind specifically and reversibly to carbohydrates and glycoconjugates, without altering the structure of the glycosyl ligand. They are found in organisms such as viruses, plants and humans, and they have been shown to possess important biological activities. The objective of this study was to purify and characterize lectins in the seeds of Clitoria fairchildiana, as well as to verify their biological activities. The results indicated the presence of a lectin (CFAL) in the glutelin acid protein fraction, which agglutinated native rabbit erythrocytes. CFAL was purified by column chromatography ion-exchange, DEAE-Sephacel, which was obtained from a peak of protein retained in the matrix by applying 0.5 M NaCl using the step-wise method. Electrophoretic analysis of this lectin in SDS-PAGE indicated a two band pattern protein molecular mass of approximately 100 and 116 kDa. CFAL proved to be unspecific to all carbohydrates/glycoconjugates in common use for the sugar inhibition test. This lectin showed no significant cytotoxicity to human red blood cells. It was observed that CFAL has anti-inflammatory activity in the paw edema induced by carrageenan model, in which a 64% diminution in edema was observed. Antinociceptive effects were observed for CFAL in the abdominal writhing test (induced by acetic acid), in which increasing doses of the lectin caused reduction in the number of contortions by up to 72%. It was concluded that the purified and characterized lectin from the seeds of Clitoria fairchildiana has anti-inflammatory and antinociceptive activity, and is not cytotoxic to human erythrocytes.

Equatorial Non-muscle Myosin II and Plastin Cooperate to Align and Compact F-actin Bundles in the Cytokinetic Ring.

Cytokinesis is the last step of cell division that physically partitions the mother cell into two daughter cells. Cytokinesis requires the assembly and constriction of a contractile ring, a circumferential array of filamentous actin (F-actin), non-muscle myosin II motors (myosin), and actin-binding proteins that forms at the cell equator. Cytokinesis is accompanied by long-range cortical flows from regions of relaxation toward regions of compression. In the C. elegans one-cell embryo, it has been suggested that anterior-directed cortical flows are the main driver of contractile ring assembly. Here, we use embryos co-expressing motor-dead and wild-type myosin to show that cortical flows can be severely reduced without major effects on contractile ring assembly and timely completion of cytokinesis. Fluorescence recovery after photobleaching in the ingressing furrow reveals that myosin recruitment kinetics are also unaffected by the absence of cortical flows. We find that myosin cooperates with the F-actin crosslinker plastin to align and compact F-actin bundles at the cell equator, and that this cross-talk is essential for cytokinesis. Our results thus argue against the idea that cortical flows are a major determinant of contractile ring assembly. Instead, we propose that contractile ring assembly requires localized concerted action of motor-competent myosin and plastin at the cell equator.

Network Contractility During Cytokinesis-from Molecular to Global Views.

Cytokinesis is the last stage of cell division, which partitions the mother cell into two daughter cells. It requires the assembly and constriction of a contractile ring that consists of a filamentous contractile network of actin and myosin. Network contractility depends on network architecture, level of connectivity and myosin motor activity, but how exactly is the contractile ring network organized or interconnected and how much it depends on motor activity remains unclear. Moreover, the contractile ring is not an isolated entity; rather, it is integrated into the surrounding cortex. Therefore, the mechanical properties of the cell cortex and cortical behaviors are expected to impact contractile ring functioning. Due to the complexity of the process, experimental approaches have been coupled to theoretical modeling in order to advance its global understanding. While earlier coarse-grained descriptions attempted to provide an integrated view of the process, recent models have mostly focused on understanding the behavior of an isolated contractile ring. Here we provide an overview of the organization and dynamics of the actomyosin network during cytokinesis and discuss existing theoretical models in light of cortical behaviors and experimental evidence from several systems. Our view on what is missing in current models and should be tested in the future is provided.

IL1RAP potentiates multiple oncogenic signaling pathways in AML.

The surface molecule interleukin-1 receptor accessory protein (IL1RAP) is consistently overexpressed across multiple genetic subtypes of acute myeloid leukemia (AML) and other myeloid malignancies, including at the stem cell level, and is emerging as a novel therapeutic target. However, the cell-intrinsic functions of IL1RAP in AML cells are largely unknown. Here, we show that targeting of IL1RAP via RNA interference, genetic deletion, or antibodies inhibits AML pathogenesis in vitro and in vivo, without perturbing healthy hematopoietic function or viability. Furthermore, we found that the role of IL1RAP is not restricted to the IL-1 receptor pathway, but that IL1RAP physically interacts with and mediates signaling and pro-proliferative effects through FLT3 and c-KIT, two receptor tyrosine kinases with known key roles in AML pathogenesis. Our study provides a new mechanistic basis for the efficacy of IL1RAP targeting in AML and reveals a novel role for this protein in the pathogenesis of the disease.

Pharmacological inhibition of the transcription factor PU.1 in leukemia.

The transcription factor PU.1 is often impaired in patients with acute myeloid leukemia (AML). Here, we used AML cells that already had low PU.1 levels and further inhibited PU.1 using either RNA interference or, to our knowledge, first-in-class small-molecule inhibitors of PU.1 that we developed specifically to allosterically interfere with PU.1-chromatin binding through interaction with the DNA minor groove that flanks PU.1-binding motifs. These small molecules of the heterocyclic diamidine family disrupted the interaction of PU.1 with target gene promoters and led to downregulation of canonical PU.1 transcriptional targets. shRNA or small-molecule inhibition of PU.1 in AML cells from either PU.1lo mutant mice or human patients with AML-inhibited cell growth and clonogenicity and induced apoptosis. In murine and human AML (xeno)transplantation models, treatment with our PU.1 inhibitors decreased tumor burden and resulted in increased survival. Thus, our study provides proof of concept that PU.1 inhibition has potential as a therapeutic strategy for the treatment of AML and for the development of small-molecule inhibitors of PU.1.

High-fat diet-induced obesity Rat model: a comparison between Wistar and Sprague-Dawley Rat.

In the past decades, obesity and associated metabolic complications have reached epidemic proportions. For the study of these pathologies, a number of animal models have been developed. However, a direct comparison between Wistar and Sprague-Dawley (SD) Rat as models of high-fat (HF) diet-induced obesity has not been adequately evaluated so far. Wistar and SD rats were assigned for 2 experimental groups for 17 weeks: standard (St) and high-fat (HF) diet groups. To assess some of the features of the metabolic syndrome, oral glucose tolerance tests, systolic blood pressure measurements and blood biochemical analysis were performed throughout the study. The gut microbiota composition of the animals of each group was evaluated at the end of the study by real-time PCR. HF diet increased weight gain, body fat mass, mesenteric adipocyte's size, adiponectin and leptin plasma levels and decreased oral glucose tolerance in both Wistar and SD rats. However, the majority of these effects were more pronounced or earlier detected in Wistar rats. The gut microbiota of SD rats was less abundant in Bacteroides and Prevotella but richer in Bifidobacterium and Lactobacillus comparatively to the gut microbiota of Wistar rats. Nevertheless, the modulation of the gut microbiota by HF diet was similar in both strains, except for Clostridium leptum that was only reduced in Wistar rats fed with HF diet. In conclusion, both Wistar and SD Rat can be used as models of HF diet-induced obesity although the metabolic effects caused by HF diet seemed to be more pronounced in Wistar Rat. Differences in the gut microbial ecology may account for the worsened metabolic scenario observed in Wistar Rat.

Cortisol awakening response among women exposed to intimate partner violence.

The studies of the effects of intimate partner violence (IPV) on the cortisol awakening response (CAR) are scarce and contradictory. While some of the studies suggested that female victims of IPV showed high CAR, other studies found low CAR. Mixed results may be related to differences in sample characteristics as well as other potential covariates associated with the cortisol, as femalés history of abuse, chronicity, severity and type of IPV, psychological distress, posttraumatic stress disorder, and social support. The study examined individual differences in CAR among 149 female victims of severe IPV reported to authorities, including 76 (51%) living in shelter and 73 (49%) living with the abusive partners. Results revealed several individual differences in CAR that may contribute to understanding the mixed results found in literature, including women with cortisol that decreased between the baseline and 30min later, women with no increase of cortisol, and women whose cortisol increased above baseline. Additionally, women without CAR experienced more chronic and severe violence, more psychological distress and PTSD symptoms. However, hierarchical multiple regression indicated that chronic severe violence was the only independent variable that significantly explained 13% of the variance in CAR, even after including all covariates in the model, and adjusting for sociodemographic variables. In conclusion, this study suggests that the HPA axis dysregulation is influenced by chronic severe violence among women victims of IPV.

Purification and biological activities of Abelmoschus esculentus seed lectin.

The Abelmoschus esculentus (Malvaceae) plant originated in Africa and has spread across a number of tropic countries, including northeastern Brazil. The plant has been used to treat various disorders, such as cancer, microbial infections, hypoglycemia, constipation, urine retention and inflammation. The lectin of A. esculentus (AEL) was isolated by precipitation with ammonium sulfate at a saturation level of 30/60 and purified by ion exchange chromatography (Sephacel-DEAE). The electrophoresis (SDS-PAGE) profile of the AEL showed two protein bands of apparent molecular mass of approximately 15.0 and 21.0 kDa. The homogenity of the protein was confirmed by electrospray mass spectrometry (ESI-MS), which revealed the presence of a 10.29-kDa monomer and a 20.58-kDa dimer. The AEL exhibits agglutinating activity against rabbit (74.41 UH/mP) and human type ABO erythrocytes (21.00 UH/mP). This activity does not require the presence of divalent cations and is specifically inhibited by lactose, fructose and mannose. The intravenous treatment with 0.01, 0.1 and 1 mg/kg of AEL inhibited the paw edema elicited by carrageenan by approximately 15, 22 and 44 %, respectively, but not that induced by dextran. In addition, treatment with 0.1, 1 and 10 mg/kg of AEL also inhibited the abdominal writhing induced by acetic acid by approximately 52, 57 and 69 %, respectively. In conclusion, AEL is a new lectin with a molecular mass of 20.0 kDa, which is -composed of a 10.291-Da monomer and a 20.582-kDa dimer, that exhibits anti-inflammatory, antinociceptive and hemagglutinating activities. In addition, the lectin hemagglutinating property is both metallo-independent and associated with the lectin domain.

Portuguese validation of the Social Competence and Behavior Evaluation Scale (SCBE-30)

Abstract Aim The Social Competence and Behavior Evaluation Scale (SCBE-30) is a 30-item questionnaire designed to assess preschoolers' behavioral problems (externalizing and internalizing) and social competence. It is widely used in the developmental research. This study aims to contribute to the adaptation and validation of the Portuguese version of the teachers' short form of the SCBE-30 (Psychol. Assess. 8:369­777, 1996). Method Participants were 361 children from 3 to 6 years old whose preschool teachers completed the SCBE-30. For external validation purposes children completed arithmetic and theory of mind tasks, and parents completed a socio-demographic questionnaire. Results Confirmatory factor analysis did not confirm the 10-item-subscale solution of the original SCBE-30 version. Instead, a five-item-subscale was found as a better solution. Discussion The reduced 15-item version replicates the three-factor structure, shows good psychometric properties and meets external validation criteria. Further research should focus on the invariance of the factor structure of the SCBE-30 between cultures. (AU)

Nutritional value and antinutritional factors of foliaceous vegetable Talinum fruticosum

Talinum fruticosum Juss (L.) is an unconventional plant belonging to the family Portulacaceae; it is a herbaceous perennial plant that grows in tropical regions as a foliaceous vegetable. T.fruticosum leaves area source of fiber and minerals and they contribute to assemble the micronutrients for daily nutritional requirements. These plants supply the essential nutrients to the human organism; however, these plants contain antinutritinal factors such as lectins and tannins which may compromise their bioavailability. In the present study, the T. fruticosum leaves samples were investigated on proximate composition and anti nutritional factors. Samples were exposed to heat treatment for washing and for cooking for 10 min. These procedures neither signifcantly changed the carbohydrates and lipids contents, nor eliminated the hemagglutinating activity which is inactivated at 70 °C, although no effective reduction of tannin from the leaves was observed.

Sorovares de Salmonella em carne de eqüídeos abatidos no nordeste do Brasil / Salmonella serovars in meat horses slaughtered in northeastern Brazil

Nas décadas de 60 e 70, houve um extraordinário incremento da exportaçäo de produtos cárneos de eqüídeos dos países da América do Sul para a Europa e Japäo. Este acontecimento favoreceu o aumento de risco da veiculaçäo de Salmonella através desses produtos, para as populações humana e animal, consumidoras. Assim, num estabelecimento industrial e exportador de carne de eqüídeos localizado no nordeste do Brasil (Pernambuco), foram analisados bacteriologicamente, 19.238 fragmentos de músculos mais externos, que revelaram 666 exames positivos referentes a 433 animais (eqüinos e asininos) e resultando no isolamento de 745 cepas de Salmonella. Na amostragem foram caracterizados do ponto de vista antigênico 98 sorovares, predominantemente classificados na subespécie I (98,9) e tendo como os mais freqüentes S. Anatum, S. Carrau, S. Saintpaul, S. Agona e S. Typhimurium. Pelas análises efetuadas admite-se que as causas primordiais da presença de Salmonella nas carnes, provavelmente decorreu do contato com os excretas dos animais abatidos, bem como pela possível contaminaçäo ambiental resultante, tendo em vista a ausência de portadores humanos, pesquisados numa parcela do pessoalNas décadas de 60 e 70, houve um extraordinário incremento da exportaçäo de produtos cárneos de eqüídeos dos países da América do Sul para a Europa e Japäo. Este acontecimento favoreceu o aumento de risco da veiculaçäo de Salmonella através desses produtos, para as populações humana e animal, consumidoras. Assim, num estabelecimento industrial e exportador de carne de eqüídeos localizado no nordeste do Brasil (Pernambuco), foram analisados bacteriologicamente, 19.238 fragmentos de músculos mais externos, que revelaram 666 exames positivos referentes a 433 animais (eqüinos e asininos) e resultando no isolamento de 745 cepas de Salmonella. Na amostragem foram caracterizados do ponto de vista antigênico 98 sorovares, predominantemente classificados na subespécie I (98,9) e tendo como os mais freqüentes S. Anatum, S. Carrau, S. Saintpaul, S. Agona e S. Typhimurium. Pelas análises efetuadas admite-se que as causas primordiais da presença de Salmonella nas carnes, provavelmente decorreu do contato com os excretas dos animais abatidos, bem como pela possível contaminaçäo ambiental resultante, tendo em vista a ausência de portadores humanos, pesquisados numa parcela do pessoal (au)