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Schizophrenia progresses through high-risk, first-episode, and chronic stages, each associated with altered spontaneous brain activity. Resting state functional MRI studies highlight these changes, but inconsistencies persist, and the genetic basis remains unclear.
Methods
A neuroimaging meta-analysis was conducted to assess spontaneous brain activity alterations in each schizophrenia stage. The largest available genome-wide association study (GWAS) summary statistics for schizophrenia (N = 53,386 cases, 77,258 controls) were used, followed by Hi-C-coupled multimarker analysis of genomic annotation (H-MAGMA) to identify schizophrenia-associated genes. Transcriptome-neuroimaging association and gene prioritization analyses were performed to identify genes consistently linked to brain activity alterations. Biological relevance was explored by functional enrichment.
Results
Fifty-two studies met the inclusion criteria, covering the high-risk (Nhigh-risk = 409, Ncontrol = 475), first-episode (Ncase = 1842, Ncontrol = 1735), and chronic (Ncase = 1242, Ncontrol = 1300) stages. High-risk stage showed reduced brain activity in the right median cingulate and paracingulate gyri. First-episode stage revealed increased activity in the right putamen and decreased activity in the left gyrus rectus and right postcentral gyrus. Chronic stage showed heightened activity in the right inferior frontal gyrus and reduced activity in the superior occipital gyrus and right postcentral gyrus. Across all stages, 199 genes were consistently linked to brain activity changes, involved in biological processes such as nervous system development, synaptic transmission, and synaptic plasticity.
Conclusions
Brain activity alterations across schizophrenia stages and genes consistently associated with these changes highlight their potential as universal biomarkers and therapeutic targets for schizophrenia.
Euthymic bipolar disorder (euBD) patients exhibit deficits in neurocognitive and social cognitive functioning compared to healthy controls (HCs). Our prior research has shown that the excitatory/inhibitory (E/I) imbalance in the default mode network (DMN) is linked to executive function in euBD. Neurocognitive impairments are associated with social cognition deficits in individuals with mental disorders. Given this connection, this study posits E/I imbalance within the DMN is associated with social cognition, with executive function as a mediator.
Methods
Seventy-five HCs and 49 euBD individuals were recruited. Using the emotion recognition task, Diagnostic Analysis of Nonverbal Accuracy 2-Taiwan version (DANVA-2-TW) and cognitive flexibility task, Wisconsin Card Sorting Test (WCST), we assessed emotion recognition and prefrontal function. Proton magnetic resonance spectroscopy (1H-MRS) measured metabolites in the posterior cingulate cortex (PCC) and medial prefrontal cortex/anterior cingulate cortex (mPFC/ACC), quantifying excitatory glutamate+glutamine (Glx) and inhibitory GABA to calculate the E/I ratio.
Results
euBD patients showed poorer emotion recognition (p = 0.020) and poorer cognitive flexibility (fewer WCST categories completed, p = 0.002). A negative association was found between emotion recognition and the E/I ratio in the mPFC/ACC of the BD patients (r = −0.30, p = 0.034), which was significantly mediated by cognitive flexibility (Z = −2.657, p = 0.007).
Conclusion
The BD patients demonstrate deficits in emotion recognition, linked to an altered E/I balance in the prefrontal cortex, and the cognitive flexibility, a key aspect of executive function, mediates the impact of the E/I ratio on emotion recognition accuracy in euBD patients.
There is preliminary evidence that childhood trauma (e.g., abuse) is associated with subclinical hypomania reported in adolescence. These findings need replicating in early adulthood, as clinical conditions emerge, and the mechanisms underlying this association need elucidating. This study aimed to examine the magnitude of shared genetic and environmental underpinnings of the association between childhood trauma with hypomanic symptoms and high-risk status for bipolar disorder (BD) using a twin design. Gene–environment correlations and interactions between childhood trauma and polygenic scores (PGS) for psychiatric and neurodevelopmental conditions were also investigated.
Methods
Childhood trauma was reported using the Avon “Life at 22+” questionnaire by 8,464 individuals from a community twin sample. Self-reported hypomanic symptoms were assessed using the Mood Disorder Questionnaire at age 26 by 7,748 participants. PGS for psychiatric and neurodevelopment conditions were derived from independent published discovery samples.
Results
Childhood trauma was significantly associated with hypomanic symptoms (β = 0.23, 95% CI: 0.20–0.25) and being at high-risk for BD (OR = 1.77, 95% CI: 1.59–1.98). These associations were strongly influenced by genetic factors (bivariate heritability range: 0.51–0.90). Gene–environment correlations were found between childhood trauma and the PGS for six conditions: Major Depressive Disorder (MDD), schizophrenia, Attention-Deficit Hyperactivity Disorder, anxiety disorders, Post-Traumatic Stress Disorder, and BD II (β range = −0.19–0.11). The MDD-PGS was found to significantly interact with childhood trauma in hypomania (β = 0.01, p < .05).
Conclusions
The associations between childhood trauma and subclinical hypomania and high-risk for BD were partially attributed to shared genetic factors. These associations were also moderated by MDD-PGS. Gene–environment correlations were detected between childhood trauma and polygenic vulnerability to psychiatric and neurodevelopmental conditions. The etiology of hypomania and BD is likely the result of a confluence of genetic and environmental factors, and research in this area should account for potential genetic confounding.
This study explored the association between serotonin transporter gene (5HTTLPR) and brain-derived neurotrophic factor gene (BDNF) polymorphisms with mental health disorders in a Chilean primary care population using latent class analysis. The sample included 789 adults genotyped for 5HTTLPR and BDNF, who were assessed for psychiatric diagnoses using the Composite International Diagnostic Interview (CIDI). Two distinct mental health profiles emerged: a high psychiatric comorbidity group, marked by a high prevalence of anxiety and stress-related disorders, and a low comorbidity group. The study found that the L’/L’ polymorphism of the serotonin transporter gene was associated with a reduced risk of belonging to the high-comorbidity group, particularly when paired with the GG polymorphism of the BDNF gene. These findings suggest a synergistic interaction between these genes that influences susceptibility to psychiatric disorders. This research underscores the importance of considering genetic interactions in mental health studies and highlights the utility of latent class analysis in identifying clinically relevant diagnostic profiles, which could enhance early detection and intervention strategies in primary care.
Research on water wave metamaterials based on local resonance has advanced rapidly. However, their application to floating structures for controlling surface gravity waves remains underexplored. In this work, we introduce the floating metaplate, a periodic array of resonators on a floating plate that leverages locally resonant bandgaps to effectively manipulate surface gravity waves. We employ the eigenfunction matching method combined with Bloch’s theorem to solve the wave–structure interaction problem and obtain the band structure of the floating metaplate. An effective model based on averaging is developed, which agrees well with the results of numerical simulation, elucidating the mechanism of bandgap formation. Both frequency- and time-domain simulations demonstrate the floating metaplate’s strong wave attenuation capabilities. Furthermore, by incorporating a gradient in the resonant frequencies of the resonators, we achieve the rainbow trapping effect, where waves of different frequencies are reflected at distinct locations. This enables the design of a broadband wave reflector with a tuneable operation frequency range. Our findings may lead to promising applications in coastal protection, wave energy harvesting and the design of resilient offshore renewable energy systems.
While many siblings of children with cancer demonstrate resilient outcomes, they also face their own unique experiences that increase their risk for acute and long-term psychosocial difficulties. It is accepted that children undergoing cancer treatment experience suffering, the alleviation of which is a main goal of palliative care, yet research has not yet explored whether siblings experience their own suffering. This work aimed to determine whether parents perceive that their child(ren) without cancer suffered throughout the illness course and how that suffering would be described.
Methods
Using literature and expert input, a survey was developed to elicit caregivers’ perceptions of suffering in their children with and without cancer and was disseminated through the American Childhood Cancer Organization. Responses regarding sibling suffering were analyzed, considering differences in accounts between bereaved caregivers and those whose child with cancer remains living.
Results
A total of 202 parents (81 bereaved, 121 whose child with cancer remains alive) responded. Themes of sibling suffering include disconnection and/or displacement, lack of stability and certainty, emotional consequences, bearing witness, and lasting impact. One distinct theme, suffering as continued loss, emerged from bereaved parents’ responses.
Significance of results
Both parental groups described sibling suffering similarly despite different outcomes for their child with cancer. The idea of sibling suffering by bearing witness to what the child with cancer experienced is unique and worthy of further understanding. This work highlights the need for sibling and parent psychosocial assessment and palliative intervention throughout cancer treatment. Gaining longitudinal input from siblings and parents regarding the experience of suffering is a critical next step to develop tailored interventions.
Single ventricle pulmonary arteriovenous malformations are poorly understood and variably assessed in published literature. To improve our understanding of single ventricle pulmonary arteriovenous malformations and facilitate multi-centre studies, it will be necessary to have uniform clinical practice patterns among paediatric heart institutions.
Objectives:
The aim of this study was to assess paediatric interventional cardiologists’ clinical perspectives and practice patterns for diagnosing single ventricle pulmonary arteriovenous malformations.
Methods:
We surveyed paediatric interventional cardiologists using the Congenital Cardiovascular Interventional Consortium listserv. A single survey was distributed electronically with two subsequent reminder emails. Voluntary participants completed the anonymous survey electronically via RedCap.
Results:
Among 253 Congenital Cardiovascular Interventional Consortium members, a total of 55 (21.7%) paediatric cardiology interventional attending physicians completed the survey. There was near unanimity (98%) that pulmonary arteriovenous malformations develop due to lack of hepatic vein blood flow to the lungs; however, there was wide variation among practice patterns. A minority (20%) of respondents perform bubble contrast echocardiograms (bubble studies) more than half the time pre-Fontan, whereas many (31%) almost never (< 5% of cases) perform bubble studies pre-Fontan. Most respondents reported that they did not perform bubble studies because results do not impact clinical decision making pre-Fontan (56%) or post-Fontan (60%). Many respondents (49%) do not have a typical volume of agitated saline that they inject for bubble studies.
Conclusions:
Clinical practice patterns vary widely among paediatric cardiology interventionalists. A standardised clinical approach, new diagnostic tools, or both are needed to standardise our field’s approach to diagnosing, studying, and treating single ventricle pulmonary arteriovenous malformations.
In 2022, a Tunisian citizen was arrested in Oslo when he tried to sell 30 Carthaginian bronze coins to a local antiques dealer. The dealer had previously alerted the police after receiving an email inquiry asking him whether he was interested in buying a ‘large number’ of Punic coins from an alleged underwater find, presumably a hoard, off the coast of Tunisia. The University of Oslo’s Museum of Cultural History, which cooperates with law-enforcement agencies and the authorities in cases involving illicit cultural artefacts, assisted with the identification of the coins. Eventually, the latter were returned to Tunisia, and Norwegian prosecutors dropped the charges against the Tunisian national. This article discusses the relevant legal framework of the case and the process that unfolded from the time when an attempt was made to sell the coins until they were returned to their country of origin. The broader numismatic implications of this find are also examined.
This single-center retrospective analysis evaluated the yield of blood cultures in patients with febrile neutropenia during a supply shortage. The detection rate of true bacteremia was observed to increase with the number of sets obtained, although this increase was not statistically significant. Findings support limiting repeat cultures within 48 hours.
For decades, party politics literature has argued that populist radical right (PRR) parties must distance themselves from their countries’ authoritarian pasts to achieve electoral relevance in a Sartorian sense. Yet, we now observe the growing success and influence of PRR parties that not only embrace nostalgia for this past but also maintain ties to it. The use of what we term ‘authoritarian nostalgia’ is not only becoming more widespread across politics but it has proven effective across diverse segments of the electorate. This study examines the extent to which (populist radical) right supporters approve of their countries’ authoritarian histories and view these past regimes favourably. Using original survey data fielded in Spain and Portugal and a novel set of survey items measuring authoritarian nostalgia, we find that supporters of VOX and Chega are more likely to express a broad sense of collective nostalgia, particularly through a longing for their country’s ‘old, glorious days’, but demonstrate strong nostalgia for Franco and Salazar’s authoritarian regimes more specifically. Furthermore, we observe similar affinities for the authoritarian past amongst traditional right-wing supporters, primarily among Partido Popular (PP) supporters in Spain, with weaker evidence for PPD/PSD supporters in Portugal. Our findings suggest that, rather than hindering electoral performance, authoritarian nostalgia can, in fact, stimulate (populist radical) right-wing electorates.
The adoption of corpus technology in school classroom settings remains limited, largely due to insufficient technological pedagogical content knowledge (TPACK) training for pedagogical corpus use. To address this gap, we investigated how teacher education in corpus-based language pedagogy (CBLP), a subdomain of TPACK for corpus technology tailored to language teachers, influenced student TESOL teachers’ self-efficacy for independent language learning and teaching. Employing a mixed-methods approach, including a CBLP training intervention (n = 120), survey data (n = 96), and interviews (n = 8) with student teachers at a university in Hong Kong SAR, China, the research validates a theoretical model through confirmatory factor analysis and structural equation modelling. Results demonstrate that corpus literacy (CL) is foundational for effective CBLP implementation and development of independent learning self-efficacy, which in turn fosters innovative, resource-rich instructional strategies. CBLP also enhances teachers’ self-efficacy for student engagement, fostering more interactive and motivating classrooms. These findings emphasise the value of embedding CL and CBLP within TESOL teacher-education programmes to prepare future language teachers for self-efficacy within dynamic, technology-enhanced classrooms.
The young, urban, and highly educated professionals who comprise the knowledge economy class are often portrayed as the champions of progressive politics in Europe. However, the coexistence of socially progressive attitudes and more conservative economic tendencies within this class deserves more scrutiny among political scientists because such tendencies, I argue, may reveal differences of consequence for electoral and policy outcomes. I point to two analytical blind spots in research on progressive politics: (1) the separation of sociocultural from economic issues, which can conceal critical policy preferences within the knowledge economy class, and (2) the prevailing dichotomy of knowledge economy “winners” and “losers,” which can lead scholars to underestimate status concerns in the knowledge economy class. To illustrate why addressing both blind spots matters for research on electoral outcomes and progressive policy agendas, I apply my claims to the issue of immigration. I show how the interaction of sociocultural progress and economic change—manifesting in this case as status gains among ethnoracial minorities—can underpin a politics of status preservation among “winners” that calls for as much attention as that dedicated to the politics of status loss among “losers.” Using cross-national survey data, I show that members of the knowledge economy class adopt a politics of status preservation in contexts in which ethnoracial minorities, although not on a par with advantaged white majorities, are better represented in high-status positions. I conclude by considering the implications for research on progressive politics in Europe.
Depression is characterized by divergent changes in positive and negative affect. Emerging roles of inflammation in depression portend avenues for novel immunomodulator-based monotherapy, targeting mechanistically distinct symptoms such as anhedonia and pessimism.
Methods
To investigate links between these divergent affective components and inflammation, we used a probabilistic reinforcement-learning fMRI paradigm, testing for evidence of hyposensitivity to reward, and hypersensitivity to punishment in low-inflammation depression cases (loCRP depression; CRP ≤ 3 mg/L; N = 48), high-inflammation depression cases (hiCRP depression; CRP > 3 mg/L; N = 31), and healthy controls (HC; CRP ≤ 3 mg/L; N = 45). We aimed to (i) determine whether depression cases with high and low inflammation showed aberrant neural activation to monetary gains and losses compared to controls, and (ii) examine if these alterations correlated with a continuous measure of C-reactive protein (CRP) in depression, as well as indices of anhedonia and pessimism derived from behavioral instruments in depression.
Results
Voxel-wise activation was observed in key brain regions sensitive to monetary reward (ventromedial prefrontal cortex, vmPFC; nucleus accumbens, NAc) and punishment (insula) outcomes across all three groups. However, there was no significant difference in activation between groups. Within depression cases, increasing CRP scaled negatively with activation in the right vmPFC and left NAc but not insula cortex. However, there was no significant association between regional activation and severity of anhedonia or pessimism.
Conclusions
Our results support the previously reported association between CRP and striatal reward reactivity in depression but do not extend this to processing of negatively valenced information.
Recent years have seen growing interest in applying the Evolutionary Transitions in Individuality (ETI) framework to human sociocultural evolution. Proponents argue that human societies exhibit features – such as multilevel organization, cooperation, and division of labour – sufficiently analogous to biological ETIs to warrant theoretical extension. This paper critically assesses such claims and argues that they rest on a fundamental misapplication of the ETI framework. Drawing on recent work in cultural evolution, I show that sociocultural systems typically lack the core conditions required for an ETI, including autonomous reproduction at the group level and the operation of natural selection in the reproductive mode. Attempts to relax these criteria risk undermining the coherence of the framework itself. I conclude that although the broader framework of Major Evolutionary Transitions may still have value for understanding sociocultural change, the specific explanatory structure of ETI theory does not transfer.
Research on strokes using genetics and neurobiobanking has highlighted some ethical, legal and social implications. Blood donation, brain donation, blood storage, re-use and sample sharing, data sharing, return of individual results, disclosure of incidental findings, pattern and causes of preference for informed consent, governance and regulation, and biorights are some of the legal problems presented. This study, therefore, explores this aspect in Sub-Saharan Africa using Nigeria and Ghana as case studies. In exploring this aspect, a qualitative method was adopted. In addition, the general jurisprudence of law and society was adopted as the theoretical framework and applied to the findings made. It was found that the law to a high level mirrors people’s expectations and that there was an existing social order to which the law was a contributor. It is therefore argued that any need for the intervention of the law must take cognizance of these findings.
2,3-Diphosphoglycerate (2,3-DPG), found primarily in red blood cells, plays a key role in regulating hemoglobin’s (Hb) affinity for oxygen. Increased 2,3-DPG levels shift the oxygen dissociation curve to the right, reducing Hb’s oxygen affinity and enhancing oxygen delivery to tissues—particularly important in conditions like anemia and high-altitude adaptation. Despite its physiological significance, research on 2,3-DPG is outdated and limited. This review aims to summarize current knowledge and identify research gaps. Measuring 2,3-DPG is challenging due to its instability and the need for careful sample handling. Chromatography and enzymatic methods are commonly used. Several factors influence 2,3-DPG levels, including diet, physiological state, and disease. Dietary phosphorus, for example, can acutely affect 2,3-DPG levels, though the impact of different meal compositions remains unexplored. Age, pregnancy, and physical activity also modulate 2,3-DPG, yet little is known about its role in infants and children. While changes in 2,3-DPG levels under various pathological conditions have been described, the molecular mechanisms behind these alterations remain poorly understood and warrant further investigation.
Clinical data science, like the broader discipline of all data science, has quickly grown from obscurity only a few decades ago to one of the fastest growing specialties in biomedical research today. Yet, the education and training of the workforce has not kept pace with the growth of the field, the complexity of science, or the needs of the profession. The purpose of this paper is to provide a template for an intensive short course on fundamentals of clinical data science that meets the needs of working professionals in academic, industry, and government research settings. Care will be taken to introduce students to essential roles, responsibilities, and practice patterns within the field, the foundational components from which they come, and many of the soft skills needed for professional practice and advancement in the field today. The course is designed as an evidence-based, immersive learning experience taught over a 5-day period on a university campus, taught using principles of best educational practice and multiple modalities, to assure optimal interaction and engagement throughout the week. This template may be reproduced by any institution interested in and capable of offering such a program.
This article examines some recent trends within the scholarship on ancient Greek women. The field of gender and women’s studies is vast, and so this review is necessarily selective; it is also historical in focus, though I have deliberately tried to include works that cover a broad chronological and geographical range, and those that draw on different kinds of source material. It is divided into three parts: part 1 examines questions concerning ‘real’ women, part 2 is on agency and part 3 draws some observations on the difficulties of, and opportunities for, writing histories of women.
Obesity has significant implications regarding the welfare of companion animals. Data regarding obesity in exotic companion mammals (ECM) are sparse. The aim of this study was to investigate obesity in pet rabbits (Oryctolagus cuniculus), guinea pigs (Cavia porcellus), and rats (Rattus norvegicus) in Estonia, and to survey husbandry practices and owner awareness. Husbandry data were collected from patients visiting the Estonian University of Life Sciences’ small animal clinic via anonymous questionnaires over an eleven-month period. Three hundred and fifty-one questionnaire responses and body condition score (BCS) data for 177 patients (71 rabbits, 73 guinea pigs, 33 rats) were collected. Twenty-eight percent of rabbits, 23% of guinea pigs and 28% of rats were overweight (BCS > 3/5). Male rats were more likely to be overweight than females and there was a negative correlation between age and body condition. There was an increased likelihood of male guinea pigs being underweight. Owner questionnaires revealed that 20% of rabbit owners, 14% of guinea pig owners and 11% of rat owners believed their pets to be overweight while 58% of owners had not received husbandry advice from a veterinarian. Obesity is a significant welfare issue in the Estonian ECM population and several detrimental husbandry practices were identified, including inappropriate feeding, insufficient physical activity, individual housing. Further studies might investigate veterinarian awareness of the issues at hand and tendencies for other species.