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Interpersonal coordination is a key determinant of successful social interaction but can be disrupted when people experience symptoms related to social anxiety or autism. Effective coordination rests on individuals directing their attention towards interaction partners. Yet little is known about the impact of the attentional behaviours of the partner themselves. As the gaze of others has heightened salience for those experiencing social anxiety or autism, addressing this gap can provide insight into how symptoms of these disorders impact coordination. Using a novel virtual reality task, we investigated whether partner gaze (i.e., direct vs. averted) influenced the emergence of interpersonal coordination. Results revealed: (i) spontaneous coordination was diminished in the averted (cf. direct) gaze condition; (ii) spontaneous coordination was positively related to symptoms of social anxiety, but only when partner gaze was averted. This latter finding contrasts the extant literature and points to the importance of social context in shaping the relationship between symptoms of psychopathology and interpersonal coordination.
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Fijación Ocular , Relaciones Interpersonales , Humanos , Masculino , Femenino , Adulto , Adulto Joven , Fijación Ocular/fisiología , Atención/fisiología , Interacción Social , Ansiedad/psicología , Ansiedad/fisiopatología , Adolescente , Trastorno Autístico/psicología , Trastorno Autístico/fisiopatologíaRESUMEN
Fungi can have important beneficial and detrimental effects on animals, yet our understanding of the diversity and function of most bee-associated fungi is poor. Over 2 million bumblebee colonies are traded globally every year, but the presence and transport of viable fungi within them is unknown. Here, we explored whether any culturable fungi could be isolated from commercial bumblebee nests. We collected samples of various substrates from within 14 bumblebee colonies, including the honey, honey cup wall, egg cup wall, and frass then placed them on agar and recorded any growth. Fungal morphotypes were then subcultured and their ITS region sequenced for identification. Overall, we cultured 11 fungal species from the various nest substrates. These included both pathogenic and non-pathogenic fungi, such as Aspergillus sp., Penicillium sp., and Candida sp. Our results provide the first insights into the diversity of viable fungal communities in commercial bumblebee nests. Further research is needed to determine if these fungi are unique to commercial colonies or prevalent in wild bumblebee nests, and crucially to determine the ecological and evolutionary implications of these fungi in host colonies.
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Aspergillus , Penicillium , Abejas , Animales , AgarRESUMEN
The capacity of arthropod populations to adapt to long-term climatic warming is currently uncertain. Here we combine theory and extensive data to show that the rate of their thermal adaptation to climatic warming will be constrained in two fundamental ways. First, the rate of thermal adaptation of an arthropod population is predicted to be limited by changes in the temperatures at which the performance of four key life-history traits can peak, in a specific order of declining importance: juvenile development, adult fecundity, juvenile mortality and adult mortality. Second, directional thermal adaptation is constrained due to differences in the temperature of the peak performance of these four traits, with these differences expected to persist because of energetic allocation and life-history trade-offs. We compile a new global dataset of 61 diverse arthropod species which provides strong empirical evidence to support these predictions, demonstrating that contemporary populations have indeed evolved under these constraints. Our results provide a basis for using relatively feasible trait measurements to predict the adaptive capacity of diverse arthropod populations to geographic temperature gradients, as well as ongoing and future climatic warming.
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Artrópodos , Rasgos de la Historia de Vida , Animales , Temperatura , Aclimatación , FenotipoRESUMEN
Cardiac surgery requiring cardiopulmonary bypass is associated with postoperative acute kidney injury and neurocognitive disorders, including delirium. Intra-operative inflammation and/or impaired tissue perfusion/oxygenation are thought to be contributors to these outcomes. It has been hypothesised that these problems may be ameliorated by the highly selective α2 -agonist, dexmedetomidine. We tested the effects of dexmedetomidine on renal and cerebral microcirculatory tissue perfusion, oxygenation and histology in a clinically relevant ovine model. Sixteen sheep were studied while conscious, after induction of anaesthesia and during 2 h of cardiopulmonary bypass. Eight sheep were allocated randomly to receive an intravenous infusion of dexmedetomidine (0.4-0.8 µg.kg-1 .h-1 ) from induction of anaesthesia to the end of cardiopulmonary bypass, and eight to receive an equivalent volume of matched placebo (0.9% sodium chloride). Commencement of cardiopulmonary bypass decreased renal medullary tissue oxygenation in the placebo group (mean (95%CI) 5.96 (4.24-7.23) to 1.56 (0.84-2.09) kPa, p = 0.001), with similar hypoxic levels observed in the dexmedetomidine group (6.33 (5.33-7.07) to 1.51 (0.33-2.39) kPa, p = 0.002). While no differences in kidney function (i.e. reduced creatinine clearance) were evident, a greater incidence of histological renal tubular injury was observed in sheep receiving dexmedetomidine (7/8 sheep) compared with placebo (2/8 sheep), p = 0.041. Graded on a semi-quantitative scale (0-3), median (IQR [range]) severity of histological renal tubular injury was higher in the dexmedetomidine group compared with placebo (1.5 (1-2 [0-3]) vs. 0 (0-0.3 [0-1]) respectively, p = 0.013). There was no difference in cerebral tissue microglial activation (neuroinflammation) between the groups. Dexmedetomidine did not reduce renal medullary hypoxia or cerebral neuroinflammation in sheep undergoing cardiopulmonary bypass.
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Dexmedetomidina , Animales , Encéfalo , Puente Cardiopulmonar , Dexmedetomidina/uso terapéutico , Riñón , Microcirculación , Enfermedades Neuroinflamatorias , OvinosRESUMEN
A novel photoactivatable Pt(IV) diazido anticancer agent, Pt-succ-DFO, bearing a pendant deferoxamine (DFO) siderophore for radiometal chelation, has been synthesized for the study of its in vivo behavior with radionuclide imaging. Pt-succ-DFO complexation of Fe(III) and Ga(III) ions yielded new heterobimetallic complexes that maintain the photoactivation properties and photocytotoxicity of the parent Pt complex in human cancer cell lines. Radiolabeled Pt-succ-DFO-68Ga (t1/2 = 68 min, positron emitter) was readily prepared under mild conditions and was stable in the dark upon incubation with human serum. PET imaging of Pt-succ-DFO-68Ga in healthy mice revealed a promising biodistribution profile with rapid renal excretion and limited organ accumulation, implying that little off-target uptake is expected for this class of agents. Overall, this research provides the first in vivo imaging study of the whole-body distribution of a photoactivatable Pt(IV) azido anticancer complex and illustrates the potential of radionuclide imaging as a tool for the preclinical development of novel light-activated agents.
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Compuestos Férricos , Radioisótopos de Galio , Animales , Humanos , Ratones , Distribución Tisular , Medicina de Precisión , Tomografía de Emisión de Positrones , Fototerapia , Línea Celular Tumoral , CirconioRESUMEN
Targeted protein degradation has demonstrated the power to modulate protein homeostasis. For overcoming the limitation to intracellular protein degradation, lysosome targeting chimeras have been recently developed and successfully utilized to degrade a range of disease-relevant extracellular and membrane proteins. Inspired by this strategy, here we describe our proof-of-concept studies using metallohelix-based degraders to deliver the extracellular human islet amyloid polypeptide (hIAPP) into the lysosomes for degradation. Our designed metallohelix can bind and inhibit hIAPP aggregation, and the conjugated tri-GalNAc motif can target macrophage galactose-type lectin 1 (MGL1), yielding chimeric molecules that can both inhibit hIAPP aggregation and direct the bound hIAPP for lysosomal degradation in macrophages. Further studies demonstrate that the enhanced hIAPP clearance has been through the endolysosomal system and depends on MGL1-mediated endocytosis. Intriguingly, Λ enantiomers show even better efficiency in preventing hIAPP aggregation and promoting internalization and degradation of hIAPP than Δ enantiomers. Moreover, metallohelix-based degraders also faciltate the clearance of hIAPP through asialoglycoprotein receptor in liver cells. Overall, our studies demonstrate that chiral metallohelix can be employed for targeted degradation of extracellular misfolded proteins and possess enantioselectivity.
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Diabetes Mellitus Tipo 2 , Humanos , Diabetes Mellitus Tipo 2/metabolismo , Polipéptido Amiloide de los Islotes Pancreáticos/química , Estereoisomerismo , Amiloide/metabolismoRESUMEN
Unintentional injuries are a leading cause of child death. The present study evaluated the effectiveness of a behavioral injury prevention program for children aged 3-18 years and their caregivers. To accommodate families during the Coronavirus-19 pandemic, training was modified to be delivered virtually. Forty-one children aged 3-18 years and 14 parents/caregivers of children aged 3-5 years attended one of several 4-hour online injury prevention training sessions directed toward residents of Washington state. Training was targeted to three different developmental stages (ages 3-5, 6-12 and 13-18 years). Study outcomes included knowledge about injury prevention strategies, perceived vulnerability for injury, self-efficacy to engage in safety behaviors and behavioral intentions to be safe. Following training, participants showed improved self-efficacy to stay safe, excellent knowledge about the learned material and increased behavioral intention to engage safely. There was minimal change in perceived vulnerability to injury among children; caregivers of young children felt their children were somewhat less vulnerable to injury following the training. Almost all participants said they would recommend the program to others. Results suggest that a virtual behavioral training program delivered remotely is feasible and may be effective to create behavior change and reduce child injury risk. Given its scalability and reach, such programs are recommended for further study, refinement and, if demonstrated effective in larger-scale controlled trials, dissemination to address the leading cause of child mortality in the United States, unintentional injury.
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Cuidadores , Padres , Niño , Humanos , Preescolar , Proyectos Piloto , Aprendizaje , Evaluación de Programas y Proyectos de SaludRESUMEN
Research and theory in nonverbal communication have made great advances toward understanding the patterns and functions of nonverbal behavior in social settings. Progress has been hindered, we argue, by presumptions about nonverbal behavior that follow from both received wisdom and faulty evidence. In this article, we document four persistent misconceptions about nonverbal communication-namely, that people communicate using decodable body language; that they have a stable personal space by which they regulate contact with others; that they express emotion using universal, evolved, iconic, categorical facial expressions; and that they can deceive and detect deception, using dependable telltale clues. We show how these misconceptions permeate research as well as the practices of popular behavior experts, with consequences that extend from intimate relationships to the boardroom and courtroom and even to the arena of international security. Notwithstanding these misconceptions, existing frameworks of nonverbal communication are being challenged by more comprehensive systems approaches and by virtual technologies that ambiguate the roles and identities of interactants and the contexts of interaction.
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Expresión Facial , Comunicación no Verbal , Humanos , Comunicación no Verbal/psicología , Emociones , Conducta SexualRESUMEN
In the intravenous iron therapy to treat iron deficiency anaemia in patients undergoing major abdominal surgery (PREVENTT) trial, the use of intravenous iron did not reduce the need for blood transfusion or reduce patient complications or length of hospital stay. As part of the trial protocol, serum was collected at randomisation and on the day of surgery. These samples were analysed in a central laboratory for markers of iron deficiency. We performed a secondary analysis to explore the potential interactions between pre-operative markers of iron deficiency and intervention status on the trial outcome measures. Absolute iron deficiency was defined as ferritin <30 µg.l-1 ; functional iron deficiency as ferritin 30-100 µg.l-1 or transferrin saturation < 20%; and the remainder as non-iron deficient. Interactions were estimated using generalised linear models that included different subgroup indicators of baseline iron status. Co-primary endpoints were blood transfusion or death and number of blood transfusions, from randomisation to 30 days postoperatively. Secondary endpoints included peri-operative change in haemoglobin, postoperative complications and length of hospital stay. Most patients had iron deficiency (369/452 [82%]) at randomisation; one-third had absolute iron deficiency (144/452 [32%]) and half had functional iron deficiency (225/452 [50%]). The change in pre-operative haemoglobin with intravenous iron compared with placebo was greatest in patients with absolute iron deficiency, mean difference 8.9 g.l-1 , 95%CI 5.3-12.5; moderate in functional iron deficiency, mean difference 2.8 g.l-1 , 95%CI -0.1 to 5.7; and with little change seen in those patients who were non-iron deficient. Subgroup analyses did not suggest that intravenous iron compared with placebo reduced the likelihood of death or blood transfusion at 30 days differentially across subgroups according to baseline ferritin (p = 0.33 for interaction), transferrin saturation (p = 0.13) or in combination (p = 0.45), or for the number of blood transfusions (p = 0.06, 0.29, and 0.39, respectively). There was no beneficial effect of the use of intravenous iron compared with placebo, regardless of the metrics to diagnose iron deficiency, on postoperative complications or length of hospital stay.
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Anemia Ferropénica , Deficiencias de Hierro , Humanos , Anemia Ferropénica/tratamiento farmacológico , Anemia Ferropénica/prevención & control , Anemia Ferropénica/complicaciones , Cuidados Preoperatorios/métodos , Hemoglobinas/análisis , Complicaciones Posoperatorias/prevención & control , Ferritinas/uso terapéutico , TransferrinasRESUMEN
Acute kidney injury is common after cardiac surgery. Vasoplegic hypotension may contribute to kidney injury, and different vasopressors may have variable effects on kidney function. We conducted a double-blind, randomised feasibility trial comparing peri-operative angiotensin-2 with noradrenaline. We randomly allocated 60 patients at two centres to a blinded equipotent angiotensin-2 or noradrenaline infusion intra-operatively and for up to 48 h postoperatively, titrated to mean arterial pressure of 70-80 mmHg. Primary feasibility outcomes included consent rate, protocol adherence, infusion duration, mean arterial pressure maintenance in the target range and major adverse outcomes. Secondary outcomes included kidney injury rate. The consent rate was 47%. Protocol adherence was 100% in the angiotensin-2 group and 94% in the noradrenaline group. Study drug duration was median (IQR [range]) 217 (160-270 [30-315]) vs. 185 (135-301 [0-480]) min (p = 0.78) min intra-operatively, and 5 (0-16 [0-48]) vs. 14.5 (4.8-29 [0-48]) hours (p = 0.075) postoperatively for angiotensin-2 and noradrenaline, respectively. The mean arterial pressure target was achieved postoperatively in 25 of 28 (89%) of the angiotensin-2 group and 27 of 32 (84%) of the noradrenaline group. One participant had a stroke, one required extracorporeal support and three required renal replacement therapy, all in the noradrenaline group (p = 0.99, p = 0.99 and p = 0.1). Acute kidney injury occurred in 7 of 28 in the angiotensin-2 group vs. 12 of 32 patients in the noradrenaline group (p = 0.31). This pilot study suggests that a trial comparing angiotensin-2 with noradrenaline is feasible. Its findings justify further investigations of angiotensin-2 in cardiac surgery.
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Lesión Renal Aguda , Procedimientos Quirúrgicos Cardíacos , Lesión Renal Aguda/etiología , Angiotensina II , Método Doble Ciego , Estudios de Factibilidad , Humanos , Norepinefrina/uso terapéutico , Proyectos PilotoRESUMEN
Silo discharge has been extensively studied for decades although questions remain regarding the nature of the velocity field, particularly for submerged systems. In this work, fluid-driven granular drainage was performed in a quasi-two-dimensional silo with grains submerged in fluid. While the observed Gaussian velocity profiles were generally consistent with current diffusion models, the diffusion length was found to significantly decrease with height in contrast to the increases previously seen in dry silos. We propose a phenomenological anomalous diffusion model for the spreading of the flow upwards in the cell, with the fluid-driven flows we study here falling in the category of subdiffusive behavior. As the viscous characteristics of the system were amplified, the diffusion length increased and the shape of the flowing zone in the silo changed, deviating further from the parabolic form predicted by traditional normal diffusion models, in effect becoming more subdiffusive as quantified by a decreasing diffusion exponent.
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The muscular dystrophies encompass a broad range of pathologies with varied clinical outcomes. In the case of patients carrying defects in fukutin-related protein (FKRP), these diverse pathologies arise from mutations within the same gene. This is surprising as FKRP is a glycosyltransferase, whose only identified function is to transfer ribitol-5-phosphate to α-dystroglycan (α-DG). Although this modification is critical for extracellular matrix attachment, α-DG's glycosylation status relates poorly to disease severity, suggesting the existence of unidentified FKRP targets. Here we reveal that FKRP directs sialylation of fibronectin, a process essential for collagen recruitment to the muscle basement membrane. Thus, our results reveal that FKRP simultaneously regulates the two major muscle-ECM linkages essential for fibre survival, and establishes a new disease axis for the muscular dystrophies.
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Fibronectinas/metabolismo , Glicosiltransferasas/metabolismo , Distrofias Musculares/metabolismo , Distrofias Musculares/patología , Distrofia Muscular Animal/metabolismo , Distrofia Muscular Animal/patología , Pentosiltransferasa/metabolismo , Proteínas de Pez Cebra/metabolismo , Animales , Membrana Basal/metabolismo , Membrana Basal/patología , Línea Celular , Modelos Animales de Enfermedad , Técnicas de Inactivación de Genes , Glicosilación , Glicosiltransferasas/deficiencia , Glicosiltransferasas/genética , Humanos , Masculino , Músculo Esquelético/metabolismo , Músculo Esquelético/patología , Distrofias Musculares/genética , Distrofia Muscular de Cinturas/genética , Distrofia Muscular de Cinturas/metabolismo , Distrofia Muscular de Cinturas/patología , Distrofia Muscular Animal/genética , Mutación , Mioblastos Esqueléticos/metabolismo , Mioblastos Esqueléticos/patología , Pentosiltransferasa/deficiencia , Pentosiltransferasa/genética , Fenotipo , Pez Cebra , Proteínas de Pez Cebra/deficiencia , Proteínas de Pez Cebra/genéticaRESUMEN
BACKGROUND: Determining the cost-effectiveness and sustainability of patient blood management programmes relies on quantifying the economic burden of preoperative anaemia. This retrospective cohort study aimed to evaluate the hospital costs attributable to preoperative anaemia in patients undergoing major abdominal surgery. METHODS: Patients who underwent major abdominal surgery between 2010 and 2018 were included. The association between preoperative patient haemoglobin (Hb) concentration and hospital costs was evaluated by curve estimation based on the least-square method. The in-hospital cost of index admission was calculated using an activity-based costing methodology. Multivariable regression analysis and propensity score matching were used to estimate the effects of Hb concentration on variables related directly to hospital costs. RESULTS: A total of 1286 patients were included. The median overall cost was US $18 476 (i.q.r.13 784-27 880), and 568 patients (44.2 per cent) had a Hb level below 13.0 g/dl. Patients with a preoperative Hb level below 9.0 g/dl had total hospital costs that were 50.6 (95 per cent c.i. 14.1 to 98.9) per cent higher than those for patients with a preoperative Hb level of 9.0-13.0 g/dl (P < 0.001), 72.5 (30.6 to 128.0) per cent higher than costs for patients with a Hb concentration of 13.1-15.0 g/dl (P < 0.001), and 62.4 (21.8 to 116.7) per cent higher than those for patients with a Hb level greater than 15.0 g/dl (P < 0.001). Multivariable general linear modelling showed that packed red blood cell (PRBC) transfusions were a principal cost driver in patients with a Hb concentration below 9.0 g/dl. CONCLUSION: Patients with the lowest Hb concentration incurred the highest hospital costs, which were strongly associated with increased PRBC transfusions. Costs and possible complications may be decreased by treating preoperative anaemia, particularly more severe anaemia.
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Abdomen/cirugía , Anemia/etiología , Costos de Hospital/estadística & datos numéricos , Cuidados Preoperatorios/economía , Anciano , Anemia/terapia , Análisis Costo-Beneficio , Femenino , Hemoglobinas/análisis , Humanos , Modelos Lineales , Masculino , Persona de Mediana Edad , Análisis Multivariante , Estudios RetrospectivosRESUMEN
ABSTRACT: Radiological emergency response may require responders to operate in contaminated environments. To provide more realistic training to these individuals, it has been proposed to disperse low amounts of short-lived radioactive material in simulated emergency scenarios. To demonstrate the applicability and safety of such activities, a limited exercise was conducted where 18F was sprayed in a small area and survey activities were executed. A pre-job external radiation exposure dose assessment was performed in preparation for this training. The research presented here compares participant external recorded doses to assessment results in order to validate the dose estimates. Two individuals were used during the dispersion, search, and survey activities. First, a radiation worker mixed 200 MBq Fludeoxyglucose 18F with 470 mL H2O in a weed sprayer and distributed it over a 3 m × 3 m area. After evaporation, an exercise participant performed search and survey activities in the area. Actual whole-body doses measured with optically stimulated luminescence dosimeters were 10 ± 1 µSv for both personnel. Whole-body digital dosimeters read 4.3 ± 0.2 µSv and 3.3 ± 0.5 µSv for the radiation worker and exercise participant, respectively. Actual extremity doses were below the dosimeters' minimum detectable limits for the radiation worker (thermoluminescence dosimeter) and exercise participant (optically stimulated luminescence dosimeter). The dose assessment-predicted whole-body doses were 2.8 ± 0.4 µSv and 3.2 ± 0.1 µSv for the radiation worker and exercise participant, respectively. The estimated dose to the radiation worker's hand was 21.8 ± 3.8 µSv, and the estimated dose to the exercise participant's knee was 13.4 ± 0.6 µSv. The study provided substantial evidence for the validity of the dose assessment method, supporting its use for a larger training exercise.
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Fluorodesoxiglucosa F18 , Exposición Profesional , Dosis de Radiación , Fluorodesoxiglucosa F18/análisis , Mano , Humanos , Exposición Profesional/análisis , Reproducibilidad de los ResultadosRESUMEN
On 11 March 2020, the World Health Organization officially declared COVID-19 a pandemic. The new physical distancing rules have had many consequences, some of which are felt throughout the justice system. Courts across the world limited their operations. Nonetheless, given that justice delayed is justice denied, many jurisdictions have turned to technologies for urgent matters. This paper offers an evidence-based comment and caution for lawyers and judges who could be inclined, for concerns such as cost and time saving, to permanently step aside from in-person trials. Using nonverbal communication research, in conjunction with American and Canadian legal principles, we argue that such a decision could harm the integrity of the justice system.
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An embodied sense of self allows individuals to acquire moment-to-moment insight regarding the relationship between themselves and their environment. Fundamental to this experience is information regarding body ownership and self-location, which can inform both intrapersonal and interpersonal functioning. Although it is well documented that variation in mental health symptoms can impact the accuracy of bodily self-perception, little research has, to date, explored the influence of social anxiety on the embodied self. To address this issue, here we propose to examine the impact of social anxiety on the rubber hand illusion (RHI), a procedure which can distort perceptions of body location and ownership. Related literature points to competing predictions relative to how symptoms of social anxiety potentially impact susceptibility to the RHI. In the current manuscript we present the results of a pilot study indicating a positive relationship between the strength of the RHI and social anxiety, and detail a proposed registered report that seeks to replicate and extend this experiment.