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1.
Rural Remote Health ; 24(3): 8788, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-39134400

RESUMEN

INTRODUCTION: Unplanned out-of-hospital births represent less than 1% of ambulance requests for assistance. However, these call-outs have a high risk of life-threatening complications, which are particularly complex in rural or remote settings with limited accessibility to specialist care support. Many community hospitals no longer provide obstetrics care, so birth parents must travel to larger regional or metropolitan hospitals for assistance. Increased travel time may increase the risk of unplanned out-of-hospital birth and/or complications such as postpartum haemorrhage and neonatal mortality. Rural volunteer ambulance officers (VAOs) are an integral component of Australia's healthcare system, especially in regional and remote areas. Although VAO response to unplanned out-of-hospital births may be considered rare compared to calls to other case types, provision of adequate care is paramount in these potentially high-risk situations. This research investigates Australian rural VAOs' perceptions of their training, experience and confidence regarding unplanned out-of-hospital birth and planned homebirth with obstetric emergencies where ambulance assistance is required. METHODS: Semi-structured interviews and focus groups were undertaken from late 2021 to mid-2023 via telephone or online videoconference. Sessions were audio-recorded and transcribed verbatim. Data were analysed and coded into themes using Braun and Clarke's six-step process for semantic coding and reflexive thematic analysis. RESULTS: Twenty-eight participants were interviewed from six Australian states and territories, all of whom worked in rural and remote Australia. Ten participants were male, 17 female and one was male-adjacent, with length of VAO experience ranging from 3 months to 29 years. Participants came from seven jurisdictional ambulance services.| Four themes emerged from analysis: (1) Lack of education and exposure to birth resulted in low confidence. Most participants reported significant anxiety attending obstetric call-outs, and explained under-utilisation of specific obstetric and neonatal skills meant skills decay was an issue; (2) limitations were discussed regarding VAO scope of practice and accessing medical equipment specifically required for birthing and neonates that could impact patient care; (3) logistical and communication difficulties were discussed. Long distances to definitive care, potentially limited backup during emergencies and potential unavailability of aeromedical retrieval increased perceived complexity of cases. Telecommunication 'black holes' created a sense of further isolation for VAOs requiring support from senior clinicians; (4) there was a perception that many members of the general public were unaware VAOs often staffed the local ambulance, and expected VAOs to have the same scope of practice as a registered paramedic. Furthermore, VAOs can attend friends and family in an emergency, potentially creating psychological trauma. CONCLUSION: VAOs report being uncomfortable attending unplanned out-of-hospital births and obstetric emergencies, perceiving they have limited ability to manage complications. Backup from a registered paramedic is dependent on availability, and telecommunications are not always reliable in rural areas for online clinical advice and support. Given the distances to definitive care in regional Australia, this has serious implications for patient safety. Continued VAO education is essential for risk reduction in out-of-hospital births.


Asunto(s)
Ambulancias , Voluntarios , Humanos , Femenino , Australia , Embarazo , Grupos Focales , Adulto , Servicios de Salud Rural/organización & administración , Entrevistas como Asunto , Masculino , Auxiliares de Urgencia/educación , Auxiliares de Urgencia/psicología , Parto Obstétrico
2.
Int J Eat Disord ; 2024 Jun 30.
Artículo en Inglés | MEDLINE | ID: mdl-38946135

RESUMEN

OBJECTIVE: An unprecedented rise in eating disorder presentations has been documented in several countries during the COVID-19 pandemic. We explored this phenomenon by analyzing nationwide psychiatric admissions over 5 years, controlling for demographic variables. METHODS: We retrospectively analyzed all hospitalizations in New Zealand with a primary psychiatric diagnosis from 2017 to 2021, using Poisson regression to calculate admission rates by diagnosis, before and during the pandemic. Using Fisher's exact test and Poisson modeling, national data were validated against a manually collected sample of eating disorder admissions. RESULTS: Eating disorder admissions rose significantly during the pandemic (RR 1.48, p < 0.0001), while other diagnoses remained unchanged or decreased slightly. Anorexia nervosa in 10 to 19-year-old females drove increases, with persistent elevations noted in the 10-14 age group. Pandemic-associated increases were more striking for Maori (RR 2.55), the indigenous Polynesian population, compared with non-Maori (RR 1.43). CONCLUSIONS: Eating disorder hospital presentations increased during the COVID-19 pandemic, while other psychiatric presentations to hospital remained relatively unchanged. Possible drivers include disrupted routines, barriers to healthcare access, altered social networks, and increased social media use. Clinical services require additional resources to manage the increased disease burden, especially in vulnerable pediatric and indigenous populations. Ongoing monitoring will be required to establish the time-course of pandemic-related clinical demand.

3.
Int J Speech Lang Pathol ; 26(3): 380-389, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38873910

RESUMEN

PURPOSE: To investigate the use of two versions of a simulation-based learning experience (SBLE) to decrease speech-language pathology (SLP) students' anxiety and increase their confidence and sense of preparedness for clinical placements. METHOD: Two cohorts of third-year SLP students (n = 33) participated in a mixed-methods study with each cohort completing one version of the SBLE. Participants completed pre- and post-program quantitative ratings of anxiety, confidence, and preparedness for clinical placements and participated in focus groups. Three clinical educators also provided qualitative data in debriefs and interviews. RESULT: Significant decreases in student ratings of anxiety, and increases in confidence and sense of preparedness, were found for participants from both versions of the SBLE. No significant differences were found between changes in each measure between the two groups. Qualitative data from the student focus groups and clinical educator interviews described affective changes in the students, which concurred with the quantitative results. CONCLUSION: Results suggest this SBLE can be used to improve SLP students' self-perceptions of readiness for clinical placements. Comparable outcomes can be achieved for students using the shorter, less resource intensive version of the SBLE program, with reduced costs, to overcome barriers to its implementation.


Asunto(s)
Ansiedad , Patología del Habla y Lenguaje , Humanos , Patología del Habla y Lenguaje/educación , Patología del Habla y Lenguaje/métodos , Femenino , Masculino , Entrenamiento Simulado/métodos , Adulto Joven , Grupos Focales , Adulto , Estudiantes del Área de la Salud/psicología , Competencia Clínica , Autoimagen
4.
Appl Plant Sci ; 12(3): e11573, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38912123

RESUMEN

Premise: Species distribution models (SDMs) are widely utilized to guide conservation decisions. The complexity of available data and SDM methodologies necessitates considerations of how data are chosen and processed for modeling to enhance model accuracy and support biological interpretations and ecological applications. Methods: We built SDMs for the invasive aquatic plant European frog-bit using aggregated and field data that span multiple scales, data sources, and data types. We tested how model results were affected by five modeler decision points: the exclusion of (1) missing and (2) correlated data and the (3) scale (large-scale aggregated data or systematic field data), (4) source (specimens or observations), and (5) type (presence-background or presence-absence) of occurrence data. Results: Decisions about the exclusion of missing and correlated data, as well as the scale and type of occurrence data, significantly affected metrics of model performance. The source and type of occurrence data led to differences in the importance of specific explanatory variables as drivers of species distribution and predicted probability of suitable habitat. Discussion: Our findings relative to European frog-bit illustrate how specific data selection and processing decisions can influence the outcomes and interpretation of SDMs. Data-centric protocols that incorporate data exploration into model building can help ensure models are reproducible and can be accurately interpreted in light of biological questions.

5.
Sci Rep ; 14(1): 8853, 2024 04 17.
Artículo en Inglés | MEDLINE | ID: mdl-38632289

RESUMEN

Individual testing of samples is time- and cost-intensive, particularly during an ongoing pandemic. Better practical alternatives to individual testing can significantly decrease the burden of disease on the healthcare system. Herein, we presented the clinical validation of Segtnan™ on 3929 patients. Segtnan™ is available as a mobile application entailing an AI-integrated personalized risk assessment approach with a novel data-driven equation for pooling of biological samples. The AI was selected from a comparison between 15 machine learning classifiers (highest accuracy = 80.14%) and a feed-forward neural network with an accuracy of 81.38% in predicting the rRT-PCR test results based on a designed survey with minimal clinical questions. Furthermore, we derived a novel pool-size equation from the pooling data of 54 published original studies. The results demonstrated testing capacity increase of 750%, 60%, and 5% at prevalence rates of 0.05%, 22%, and 50%, respectively. Compared to Dorfman's method, our novel equation saved more tests significantly at high prevalence, i.e., 28% (p = 0.006), 40% (p = 0.00001), and 66% (p = 0.02). Lastly, we illustrated the feasibility of the Segtnan™ usage in clinically complex settings like emergency and psychiatric departments.


Asunto(s)
COVID-19 , Humanos , Prevalencia , Ahorro de Costo , Aprendizaje Automático , Medición de Riesgo
6.
Ugeskr Laeger ; 185(50)2023 12 11.
Artículo en Danés | MEDLINE | ID: mdl-38084615

RESUMEN

Introduction The use and consumption of "products", such as cosmetic procedures and confectionery, is on a rise in the Danish population. However, it has never been evaluated if the same tendency can be observed among the providers of these products. In view of the upcoming Christmas, we decided to investigate this delicate matter. Methods This study was a survey-based cross-sectional study examining demographics, professional backgrounds, as well as frequency and preferences regarding confectionery and cosmetic procedures among confectioners and plastic surgeons. Results A total of 90 persons answered the questionnaire. Results showed that consumption of confectionery was high among both confectioners and plastic surgeons, and that the use of cosmetic procedures was higher among both confectioners and plastic surgeons than among the background population. Both groups preferred to know the person who provided "the product" within their respective area. Conclusion Most plastic surgeons do not need to know their confectioner but would like to know their cosmetic procedure provider. So, if you, as part of the department management, or simply as a well-meaning colleague, want to treat your staff/colleagues, you can safely order cake from a random confectioner but not cosmetic procedures from a random surgeon! Funding none. Trial registration not relevant.


Asunto(s)
Cirujanos , Cirugía Plástica , Humanos , Estudios Transversales , Quirófanos , Encuestas y Cuestionarios
7.
BMJ Open Qual ; 12(4)2023 12 14.
Artículo en Inglés | MEDLINE | ID: mdl-38097283

RESUMEN

INTRODUCTION: Fluid balance monitoring is pivotal to patients' health. Thus, fluid balance charting is an essential part of clinical nursing documentation. This systematic review aimed to investigate and describe the quality of fluid balance monitoring in medical, surgical and intensive care units, with an emphasis on the completeness of charting data, calculation errors and accuracy, and to evaluate methods used to improve fluid balance charting. MATERIALS AND METHODS: Quantitative studies involving adult patients and reporting data on fluid balance monitoring were included in the review. We searched MEDLINE, Embase, CINAHL and the Cochrane Library. The risk of bias in the included studies was assessed using tools developed by the Joanna Briggs Institute. RESULTS: We included a total of 23 studies, which involved 6649 participants. The studies were quasi-experimental, cohort or prevalence studies, and every third study was of low quality. Definitions of 'completeness' varied, as well as patient categories and time of evaluation. Eighteen studies reported the prevalence of patients with complete fluid balance charts; of those, 10 reported that not more than 50% of fluid balance charts were complete. Studies addressing calculation errors found them in 25%-35% of charts, including omissions of, for example, intravenous medications. The reported interventions consisted of various components such as policies, education, equipment, visual aids, surveillance and dissemination of results. Among studies evaluating interventions, only 38% (5 of 13) achieved compliance with at least 75% of complete fluid balance charts. Due to the heterogeneity of the studies, a meta-analysis was not possible. CONCLUSION: The quality of fluid balance charting is inadequate in most studies, and calculation errors influence quality. Interventions included several components, and the impact on the completion of fluid balance charts varied.


Asunto(s)
Unidades de Cuidados Intensivos , Equilibrio Hidroelectrolítico , Adulto , Humanos , Estudios Transversales
9.
Biochem Soc Trans ; 51(3): 1347-1360, 2023 06 28.
Artículo en Inglés | MEDLINE | ID: mdl-37264943

RESUMEN

P-type ATPase are present in nearly all organisms. They maintain electrochemical gradients for many solutes, in particular ions, they control membrane lipid asymmetry, and are crucial components of intricate signaling networks. All P-type ATPases share a common topology with a transmembrane and three cytoplasmic domains and their transport cycle follows a general scheme - the Post-Albers-cycle. Recently, P-type ATPase research has been advanced most significantly by the technological advancements in cryo-EM analysis, which has elucidated many new P-type ATPase structures and mechanisms and revealed several new ways of regulation. In this review, we highlight the progress of the field and focus on special features that are present in the five subfamilies. Hence, we outline the new intersubunit transport model of KdpFABC, the ways in which heavy metal pumps have evolved to accommodate various substrates, the strategies Ca2+ pumps utilize to adapt to different environmental needs, the intricate molecular builds of the ion binding sites in Na,K- and H,K-ATPases, the remarkable hexameric assembly of fungal proton pumps, the many ways in which P4-ATPase lipid flippases are regulated, and finally the deorphanization of P5 pumps. Interestingly many of the described features are found in more than one of the five subfamilies, and mixed and matched together to provide optimal function and precise regulation.


Asunto(s)
ATPasas Tipo P , ATPasas Tipo P/metabolismo , Adenosina Trifosfatasas/metabolismo , Lípidos de la Membrana/metabolismo , Transporte Biológico , Sitios de Unión
10.
Australas Emerg Care ; 26(2): 119-125, 2023 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-36100541

RESUMEN

BACKGROUND: Out-of-hospital births (OOHBs) are rare representing ∼0.05% of prehospital callouts. OOHBs are at increased risk of complications including life-threatening conditions such as postpartum haemorrhage and neonate resuscitation. This research investigated Australian paramedics perceptions of' training, experience, and confidence with OOHBs. METHODS: Semi-structured qualitative interviews were undertaken in late 2021 via online conference or face-to-face. Sessions were audio-recorded and transcribed. Data was analysed and coded into over-arching themes using thematic analysis. RESULTS: Fourteen participants were interviewed from military, industrial, and jurisdictional ambulance services. Nine participants were female, and experience ranged from 1.5 to 20 years. Six Australian states were represented, incorporating rural and metropolitan regions. Participants reported sporadic or infrequent training. No participant had exposure to OOHBs during their undergraduate degree, with the most experienced paramedic only attending six births. Participants with little/no experience reported low confidence, and even more experienced participants reported anxiety when attending OOHBs, particularly if there were long distances to definitive care or potential complications. CONCLUSION: Many paramedics expressed low confidence and high anxiety regarding OOHBs, especially regarding complications. Many felt insufficient time was dedicated to OOHBs during education and training. This has the capacity to impact on patient care and outcomes.


Asunto(s)
Servicios Médicos de Urgencia , Paramédico , Recién Nacido , Humanos , Femenino , Embarazo , Masculino , Australia , Técnicos Medios en Salud/educación , Hospitales
11.
Bioscience ; 72(10): 978-987, 2022 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-36196222

RESUMEN

The early twenty-first century has witnessed massive expansions in availability and accessibility of digital data in virtually all domains of the biodiversity sciences. Led by an array of asynchronous digitization activities spanning ecological, environmental, climatological, and biological collections data, these initiatives have resulted in a plethora of mostly disconnected and siloed data, leaving to researchers the tedious and time-consuming manual task of finding and connecting them in usable ways, integrating them into coherent data sets, and making them interoperable. The focus to date has been on elevating analog and physical records to digital replicas in local databases prior to elevating them to ever-growing aggregations of essentially disconnected discipline-specific information. In the present article, we propose a new interconnected network of digital objects on the Internet-the Digital Extended Specimen (DES) network-that transcends existing aggregator technology, augments the DES with third-party data through machine algorithms, and provides a platform for more efficient research and robust interdisciplinary discovery.

12.
Aust N Z J Public Health ; 46(5): 682-688, 2022 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-35924894

RESUMEN

OBJECTIVES: To explore perceptions of alcohol and other drug (AOD) education and digital game design preferences among Australian adolescents with the goal of identifying key factors to promote engagement in an AOD serious game for Australian secondary school students. METHODS: Semi-structured focus groups were conducted with 36 adolescents aged between 13 and 18 years. Qualitative data was analysed using thematic analysis. RESULTS: Participants described heightened engagement with AOD education that incorporated relatable and relevant real-life stories and interactive discussions. They also expressed a desire for learning to focus on practical strategies to reduce AOD harm and overcome social pressure to use AOD. Participants highlighted the importance of incorporating relatable characters and context-relevant scenarios in promoting engagement, and identified social elements, player choice, and optimal challenge as important game design considerations. CONCLUSIONS: A focus on meaningful realistic scenarios, relatable characters, relevant information and practical skills may promote high school aged students' engagement with AOD educational content. Game designs incorporating social elements and decision-making opportunities may be conducive to promoting engagement and enhancing learning. IMPLICATIONS FOR PUBLIC HEALTH: Findings from this study can be used by researchers and game designers for the development of future AOD serious games targeted at Australian adolescents.


Asunto(s)
Aprendizaje , Estudiantes , Adolescente , Australia , Niño , Humanos
13.
Eur J Obstet Gynecol Reprod Biol ; 271: 245-249, 2022 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-35245715

RESUMEN

INTRODUCTION: Endometriosis is a painful, chronic inflammatory disorder that is difficult to treat. Studies have suggested that diet may have a therapeutic effect on chronic inflammation. However, only limited information is available regarding the impact of diet on pain perception in relation to endometriosis. As such, the aim of this review was to evaluate if diet has any impact on pain perception in women suffering from endometriosis. MATERIALS AND METHODS: A systematic review was conducted by searching Medline and Embase to identify randomized controlled trials and observational studies adhering to the PRISMA and SWiM guidelines. A table summarizing the findings was developed using the GRADE approach. Inclusion criteria were: women of reproductive age; laparoscopically confirmed diagnosis of endometriosis; and intervention including any type of dietary change. This review was registered with PROSPERO on 14 November 2020 (CRD42020212314). RESULTS: In total, the database search identified 2185 studies; of these, six studies fulfilled the inclusion criteria. The Newcastle-Ottawa scale and the Cochrane tool were used to assess the studies, which were concluded to be of high quality and to have low risk of bias. All studies had a positive impact on pain perception, with all except one study reporting a significant reduction in pain perception, indicating that high intake of polyunsaturated fatty acids, a gluten-free diet and a low nickel diet may improve painful endometriosis. It was not possible to conduct a meta-analysis due to considerable heterogeneity amongst the included studies due to differences in dietary adherence, dietary therapies, outcome measurements, populations, durations and study designs. CONCLUSION: All studies found that diet had a positive impact on pain perception among women with endometriosis. However, the majority of available evidence on dietary interventions in relation to endometriosis-associated pain was derived from non-randomized controlled trials, which have multiple sources of bias. Therefore, further studies are needed to investigate diet and its effect on pain perception in women with endometriosis.


Asunto(s)
Endometriosis , Dieta , Endometriosis/cirugía , Femenino , Humanos , Dolor , Percepción del Dolor
14.
Biodivers Data J ; 10: e77492, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35210916

RESUMEN

BACKGROUND: European frog-bit (Hydrocharismorsus-ranae L.; EFB) is a free-floating aquatic plant invasive in Canada, the United States and India. It is native to Europe and northern and western Asia and is believed to have first been introduced to North America in Ottawa, Ontario in 1932. It has since spread by way of the St. Lawrence River and connected waterways to southern Ontario and Quebec and parts of the northern United States. Invasive European frog-bit occurs in freshwater coastal wetlands and inland waters, where it can form dense mats that have the potential to limit recreational and commercial use of waterways, alter water chemistry and impact native species and ecosystems. Data on the past and present distribution of this invasive species provide geospatial information that can be used to infer the pattern of invasion and inform management and monitoring targeted at preventing secondary spread. Our EFB dataset contains 12,037 preserved specimen and observation-based occurrence records, including 9,994 presence records spanning two Canadian provinces and ten U.S. states and 2,043 absence records spanning five U.S. states. The aggregated EFB dataset provides a curated resource that has been used to guide a Michigan management strategy and provide information for ongoing efforts to develop invasion risk assessments, species distribution models and decision-support tools for conservation and management. NEW INFORMATION: Specimen-based and observation-based occurrence data were accessed through nine digital data repositories or aggregators and three primary sources. Twenty-six percent of the data are new records not previously published to a data repository or aggregator prior to this study. We removed duplicate data and excluded records with incorrect species identifications. Occurrence records without coordinates were georeferenced from recorded locality descriptions. Data were standardised according to Darwin Core. This aggregated dataset is the most complete account of EFB occurrence records in its North American invasive range.

15.
Emerg Med J ; 39(1): 45-51, 2022 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-33593812

RESUMEN

OBJECTIVE: Paramedics are at the forefront of emergency healthcare. Quick and careful decision making is required to effectively care for their patients; however, excessive sleepiness has the potential to impact on clinical decision making. Studies investigating the effects of night shift work on sleepiness, cognitive function and clinical performance in the prehospital setting are limited. Here, we aimed to determine the extent to which sleepiness is experienced over the course of a simulation-based 13-hour night shift and how this impacts on clinical performance and reaction time. METHODS: Twenty-four second year paramedic students undertook a 13-hour night shift simulation study in August 2017. The study consisted of 10 real-to-life clinical scenarios. Sleepiness, perceived workload and motivation were self-reported, and clinical performance graded for each scenario. Reaction time, visual attention and task switching were also evaluated following each block of two scenarios. RESULTS: The accuracy of participants' clinical decision making declined significantly over the 13-hour night shift simulation. This was accompanied by an increase in sleepiness and a steady decline in motivation. Participants performed significantly better on the cognitive flexibility task across the duration of the simulated night shift and no changes were observed on the reaction time task. Perceived workload varied across the course of the night. CONCLUSION: Overall, increased sleepiness and decreased clinical decision making were noted towards the end of the 13-hour simulated night shift. It is unclear the extent to which these results are reflective of practising paramedics who have endured several years of night shift work, however, this could have serious implications for patient outcomes and warrants further investigation.


Asunto(s)
Somnolencia , Tolerancia al Trabajo Programado , Técnicos Medios en Salud , Toma de Decisiones Clínicas , Humanos , Estudiantes
17.
J Eat Disord ; 9(1): 105, 2021 Aug 28.
Artículo en Inglés | MEDLINE | ID: mdl-34454600

RESUMEN

BACKGROUND: Several countries have reported increased demand for eating disorder services during the COVID-19 pandemic, particularly for adolescents. Within New Zealand, anecdotal and media reports suggest similar changes but are limited in scope and detail. We assessed eating disorder service demand in the Waikato district in relation to the COVID-19 pandemic. METHODS: We retrospectively analysed records of eating disorder admissions and referrals for both children (< 18 years) and adults (≥ 18 years) during 2019 and 2020 in the Waikato, a mixed urban-rural province in northern New Zealand (population 435,000). We analysed medical admission and outpatient referral rates, and referral acuity, in relation to the COVID-19 pandemic using Welch's t- and chi-square tests. RESULTS: 106 medical admissions met inclusion criteria (n = 37 in 2019; 69 in 2020). Admissions for eating disorders increased markedly following nationwide lockdown in March 2020 (RR = 1.7, p = 0.01), largely driven by increases in adult admissions (RR 2.0, p = 0.005). The proportion of 'new patient' admissions showed comparable increases for both children (RR = 2.0, p = 0.02) and adults (RR = 2.3, p = 0.03). Following lockdown, outpatient referrals increased in acuity (RR = 1.8, p = 0.047) and volume (RR = 1.6, p = 0.076) for children but not for adults. CONCLUSIONS: Our study confirms a pandemic-related increase in demand for eating disorder services in the Waikato region of New Zealand, consistent with findings reported overseas. We observed contrasting increases in admissions for adults and outpatient referrals for children, exacerbating resource constraints for already stretched services and compromising provision of timely care. The COVID-19 pandemic has been linked to increased numbers and worsening severity of eating disorders in several settings. In New Zealand, similar trends have been noted anecdotally. We assessed clinical records to calculate rates of eating disorder-related hospital admissions and outpatient referrals during 2019 and 2020. We found significant increases in hospital admissions related to COVID-19, particularly for adults, and greater proportions of both children and adults having a first-ever eating disorder-related admission. In outpatient services, young people were referred more frequently during the pandemic and were more physically unwell when referred. These results indicate increased demand for eating disorder services as a result of the pandemic and complement findings reported overseas.

18.
J Mol Biol ; 433(16): 167015, 2021 08 06.
Artículo en Inglés | MEDLINE | ID: mdl-33933469

RESUMEN

Many bacteria export intracellular calcium using active transporters homologous to the sarco/endoplasmic reticulum Ca2+-ATPase (SERCA). Here we present three crystal structures of Ca2+-ATPase 1 from Listeria monocytogenes (LMCA1). Structures with BeF3- mimicking a phosphoenzyme state reveal a closed state, which is intermediate between the outward-open E2P and the proton-occluded E2-P* conformations known for SERCA. It suggests that LMCA1 in the E2P state is pre-organized for dephosphorylation upon Ca2+ release, consistent with the rapid dephosphorylation observed in single-molecule studies. An arginine side-chain occupies the position equivalent to calcium binding site I in SERCA, leaving a single Ca2+ binding site in LMCA1, corresponding to SERCA site II. Observing no putative transport pathways dedicated to protons, we infer a direct proton counter transport through the Ca2+ exchange pathways. The LMCA1 structures provide insight into the evolutionary divergence and conserved features of this important class of ion transporters.


Asunto(s)
Sitios de Unión , Listeria monocytogenes/enzimología , Modelos Moleculares , Unión Proteica , Conformación Proteica , ATPasas Transportadoras de Calcio del Retículo Sarcoplásmico/química , ATPasas Transportadoras de Calcio del Retículo Sarcoplásmico/metabolismo , Relación Estructura-Actividad , Calcio/química , Calcio/metabolismo , Cristalografía por Rayos X , Fosforilación
19.
Acta Obstet Gynecol Scand ; 100(9): 1595-1601, 2021 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-33999412

RESUMEN

INTRODUCTION: Endometriosis is challenging to treat. It is a painful and chronic inflammatory disorder that impacts up to 10% of women of reproductive age. Despite available surgical and medical treatment options, recurrence of symptoms is common. Available studies suggest that exercise may have a therapeutic effect on chronic inflammation and thereby on pain perception. This review evaluates whether exercise can decrease pain perception in women with symptomatic endometriosis. MATERIAL AND METHODS: This systematic review was conducted according to PRISMA by searching databases Medline and Embase to locate randomized controlled trials and observational studies. Risk of bias was investigated using the Cochrane Collaboration Tool for the Evaluation of Randomized Controlled Trials and the ROBINS-I quality assessment scale. Inclusion criteria were women of reproductive age, laparoscopically confirmed diagnosis of endometriosis, and intervention of any type of exercise. All manuscripts were evaluated by two of the authors and when in doubt a third author was consulted. This review was registered in PROSPERO on November 14, 2020 (CRD42020212309). RESULTS: Six articles fulfilled the inclusion criteria and were included in this systematic review. Concerning exercise, two studies showed significant decrease in pain relief but the remaining studies showed either negative or no impact on pain relief. A meta-analysis could not be conducted because of the considerable heterogeneity among the included studies. CONCLUSIONS: The present review does not indicate any beneficial effect of exercise on pain in women with endometriosis. There is a need for randomized controlled trials with correct power calculation, well-defined study groups and training programs to be able to answer the question of whether exercise can improve the pain experience in patients with endometriosis.


Asunto(s)
Endometriosis , Terapia por Ejercicio , Percepción del Dolor , Dolor Pélvico , Femenino , Humanos
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