Literature Watch

The Lack of Neurofeedback Training Regulation Guidance and Process Evaluation May be a Source of Controversy in Post-Traumatic Stress Disorder-Neurofeedback Research: A Systematic Review and Statistical Analysis

Deep learning - Thu, 2025-05-15 06:00

Brain Connect. 2025 May 15. doi: 10.1089/brain.2024.0084. Online ahead of print.

ABSTRACT

Objectives: Neurofeedback (NF) based on brain-computer interface (BCI) is an important direction in adjunctive interventions for post-traumatic stress disorder (PTSD). However, existing research lacks comprehensive methodologies and experimental designs. There are concerns in the field regarding the effectiveness and mechanistic interpretability of NF, prompting this study to conduct a systematic analysis of primary NF techniques and research outcomes in PTSD modulation. The study aims to explore reasons behind these concerns and propose directions for addressing them. Methods: A search conducted in the Web of Science database up to December 1, 2023, yielded 111 English articles, of which 80 were excluded based on predetermined criteria irrelevant to this study. The remaining 31 original studies were included in the literature review. A checklist was developed to assess the robustness and credibility of these 31 studies. Subsequently, these original studies were classified into electroencephalogram-based NF (EEG-NF) and functional magnetic resonance imaging-based NF (fMRI-NF) based on BCI type. Data regarding target brain regions, target signals, modulation protocols, control group types, assessment methods, data processing strategies, and reported outcomes were extracted and synthesized. Consensus theories from existing research and directions for future improvements in related studies were distilled. Results: Analysis of all included studies revealed that the average sample size of PTSD patients in EEG and fMRI NF studies was 17.4 (SD 7.13) and 14.6 (SD 6.37), respectively. Due to sample and neurofeedback training protocol constraints, 93% of EEG-NF studies and 87.5% of fMRI-NF studies used traditional statistical methods, with minimal utilization of basic machine learning (ML) methods and no studies utilizing deep learning (DL) methods. Apart from approximately 25% of fMRI NF studies supporting exploratory psychoregulatory strategies, the remaining EEG and fMRI studies lacked explicit NF modulation guidance. Only 13% of studies evaluated NF effectiveness methods involving signal classification, decoding during the NF process, and lacking in process monitoring and assessment means. Conclusion: In summary, NF holds promise as an adjunctive intervention technique for PTSD, potentially aiding in symptom alleviation for PTSD patients. However, improvements are necessary in the process evaluation mechanisms for PTSD-NF, clarity in NF modulation guidance, and development of ML/DL methods suitable for PTSD-NF with small sample sizes. To address these challenges, it is crucial to adopt more rigorous methodologies for monitoring NF, and future research should focus on the integration of advanced data analysis techniques to enhance the effectiveness and precision of PTSD-NF interventions. Impact Statement The implications of this study are to address the limited application of Neurofeedback training (NFT) in post-traumatic stress disorder (PTSD) research, where a significant portion of the approaches, foundational research, and conclusions lack consensus. There is a notable absence of retrospective statistical analyses on NFT interventions for PTSD. This study provides a comprehensive statistical analysis and discussion of existing research, offering valuable insights for future studies. The findings hold significance for researchers, clinicians, and practitioners in the field, providing a foundation for informed, evidence-based interventions for PTSD treatment.

PMID:40371570 | DOI:10.1089/brain.2024.0084

Categories: Literature Watch

Trends and Gaps in Public Perception of Genetic Testing for Dementia Risk: Unsupervised Deep Learning of Twitter Posts From 2010 to 2023

Deep learning - Thu, 2025-05-15 06:00

Alzheimer Dis Assoc Disord. 2025 May 15. doi: 10.1097/WAD.0000000000000667. Online ahead of print.

ABSTRACT

BACKGROUND: Genetic testing for dementia has drawn public attention in recent years, albeit with concerns on its appropriate use. This study leveraged Twitter data to analyze public perceptions related to genetic testing for dementia.

METHODS: English tweets from January 1, 2010 to April 1, 2023, containing relevant terms, were extracted from Twitter API. A Bidirectional Encoder Representations from Transformers (BERT) model was used with Named Entity Recognition (NER) to identify individual and organizational users. BERT-based topic modeling was applied to identify the themes for relevant source tweets. Topic coherence was assessed through manual inspection, complemented by the Silhouette Coefficient. Manual thematic analysis, following Braun and Clarke's approach, refined the topics and themes.

RESULTS: The analysis of 3045 original/source tweets identified 9 topics (Silhouette Coefficient=0.19), categorized into 3 main themes: (1) opinions on the appropriateness of genetic testing in dementia diagnosis; (2) discussion on the psychosocial impact; (3) discussion on genetic testing's role in Alzheimer's disease treatment and prevention. Theme 1 comprised 90.6% of source tweets, demonstrating prevailing contentions. Tweets in theme 2 were increasingly contributed by organization users over time and included tweets containing misinformation about genetic testing in children. Tweets in theme 3 were increasingly contributed by individual users, possibly suggesting rising public interest in the treatment and prevention of dementia.

CONCLUSION: The study highlighted limited public understanding of the nondeterministic nature of genetic testing for dementia, with concerns about unsupervised direct-to-consumer genetic test marketing, emphasizing the need to counter misinformation and raise public awareness.

PMID:40371554 | DOI:10.1097/WAD.0000000000000667

Categories: Literature Watch

Review of different convolutional neural networks used in segmentation of prostate during fusion biopsy

Deep learning - Thu, 2025-05-15 06:00

Cent European J Urol. 2025;78(1):23-39. doi: 10.5173/ceju.2024.0064. Epub 2025 Mar 21.

ABSTRACT

INTRODUCTION: The incidence of prostate cancer is increasing in Poland, particularly due to the aging population. This review explores the potential of deep learning algorithms to accelerate prostate contouring during fusion biopsies, a time-consuming but crucial process for the precise diagnosis and appropriate therapeutic decision-making in prostate cancer. Implementing convolutional neural networks (CNNs) can significantly improve segmentation accuracy in multiparametric magnetic resonance imaging (mpMRI).

MATERIAL AND METHODS: A comprehensive literature review was conducted using PubMed and IEEE Xplore, focusing on open-access studies from the past five years, and following PRISMA 2020 guidelines. The review evaluates the enhancement of prostate contouring and segmentation in MRI for fusion biopsies using CNNs.

RESULTS: The results indicate that CNNs, particularly those utilizing the U-Net architecture, are predominantly selected for advanced medical image analysis. All the reviewed algorithms achieved a Dice similarity coefficient (DSC) above 74%, indicating high precision and effectiveness in automatic prostate segmentation. However, there was significant heterogeneity in the methods used to evaluate segmentation outcomes across different studies.

CONCLUSIONS: This review underscores the need for developing and optimizing segmentation algorithms tailored to the specific needs of urologists performing fusion biopsies. Future research with larger cohorts is recommended to confirm these findings and further enhance the practical application of CNN-based segmentation tools in clinical settings.

PMID:40371421 | PMC:PMC12073522 | DOI:10.5173/ceju.2024.0064

Categories: Literature Watch

A comprehensive image dataset for accurate diagnosis of betel leaf diseases using artificial intelligence in plant pathology

Deep learning - Thu, 2025-05-15 06:00

Data Brief. 2025 Apr 22;60:111564. doi: 10.1016/j.dib.2025.111564. eCollection 2025 Jun.

ABSTRACT

In South Asian countries, agriculture is a crucial employment field, and a remarkable number of people depend on it for their livelihood. Crop diseases are a significant threat to sustainable development in the agriculture field. Automated efficient crop disease diagnosis techniques developed with comprehensive field image datasets can play a vital role in preventing diseases at an early stage. Betel leaf is widely consumed in South Asian countries for its nutritional benefits, but to the best of our knowledge, no extensive dataset of betel leaf is available that can play a crucial role in developing accurate disease diagnosis tools. Farmers face a significant economic loss due to betel leaf diseases, and due to the lack of efficient diagnosis tools, the farming of betel leaf has become very difficult day by day. Our motive is to develop a reliable and versatile image dataset of field images that will assist artificial intelligence-based pathology research on betel leaf diseases. This dataset contains healthy leaf images and two common disease images of betel leaf such as leaf rot and leaf spot [1]. Initially, 2,037 betel leaf images were captured in a natural daylight environment from several betel cultivation fields in Bangladesh. Afterward, 10,185 images were generated using image augmentation strategies including flipping, brightness factor, contrast factor, and rotation. This dataset is well-compatible with machine learning and deep learning-based pathology research, as it contains enough image samples for model training, validation, and testing. Moreover, a comparison study is conducted that ensures this dataset fulfills the gap of a reliable and extensive dataset of betel leaf. This comprehensive dataset serves as a crucial resource for researchers in developing efficient computational models for accurate betel leaf disease diagnosis.

PMID:40371167 | PMC:PMC12076791 | DOI:10.1016/j.dib.2025.111564

Categories: Literature Watch

Prediction of prognosis in acute ischemic stroke after mechanical thrombectomy based on multimodal MRI radiomics and deep learning

Deep learning - Thu, 2025-05-15 06:00

Front Neurol. 2025 Apr 30;16:1587347. doi: 10.3389/fneur.2025.1587347. eCollection 2025.

ABSTRACT

BACKGROUND: Acute ischemic stroke (AIS) is a major global health threat associated with high rates of disability and mortality, highlighting the need for early prognostic assessment to guide treatment. Currently, there are no reliable methods for the early prediction of poor prognosis in AIS, especially after mechanical thrombectomy. This study aimed to explore the value of radiomics and deep learning based on multimodal magnetic resonance imaging (MRI) in predicting poor prognosis in patients with AIS who underwent mechanical thrombectomy. This study aimed to provide a more accurate and comprehensive tool for stroke prognosis.

METHODS: This study retrospectively analyzed the clinical data and multimodal MRI images of patients with stroke at admission. Logistic regression was employed to identify the risk factors associated with poor prognosis and to construct a clinical model. Radiomics features of the stroke-affected regions were extracted from the patients' baseline multimodal MRI images, and the optimal radiomics features were selected using a least absolute shrinkage and selection operator regression model combined with five-fold cross-validation. The radiomics score was calculated based on the feature weights, and machine learning techniques were applied using a logistic regression classifier to develop the radiomics model. In addition, a deep learning model was devised using ResNet101 and transfer learning. The clinical, radiomics, and deep learning models were integrated to establish a comprehensive multifactorial logistic regression model, termed the CRD (Clinic-Radiomics-Deep Learning) model. The performance of each model in predicting poor prognosis was assessed using receiver operating characteristic (ROC) curve analysis, with the optimal model visualized as a nomogram. A calibration curve was plotted to evaluate the accuracy of nomogram predictions.

RESULTS: A total of 222 patients with AIS were enrolled in this study in a 7:3 ratio, with 155 patients in the training cohort and 67 in the validation cohort. Statistical analysis of clinical data from the training and validation cohorts identified two independent risk factors for poor prognosis: the National Institutes of Health Stroke Scale score at admission and the occurrence of intracerebral hemorrhage. Of the 1,197 radiomic features, 16 were selected to develop the radiomics model. Area under the ROC curve (AUC) analysis of specific indicators demonstrated varying performances across methods and cohorts. In the training cohort, the clinical, radiomics, deep learning, and integrated CRD models achieved AUC values of 0.762, 0.755, 0.689, and 0.834, respectively. In the validation cohort, the clinical model exhibited an AUC of 0.874, the radiomics model achieved an AUC of 0.805, the deep learning model attained an AUC of 0.757, and the CRD model outperformed all models, with an AUC of 0.908. Calibration curves indicated that the CRD model showed exceptional consistency and accuracy in predicting poor prognosis in patients with AIS. Decision curve analysis revealed that the CRD model offered the highest net benefit compared with the clinical, radiomics, and deep learning models.

CONCLUSION: The CRD model based on multimodal MRI demonstrated high diagnostic efficacy and reliability in predicting poor prognosis in patients with AIS who underwent mechanical thrombectomy. This model holds considerable potential for assisting clinicians with risk assessment and decision-making for patients experiencing ischemic stroke.

PMID:40371075 | PMC:PMC12074947 | DOI:10.3389/fneur.2025.1587347

Categories: Literature Watch

Letter to 'Automated CT image prescription of the gallbladder using deep learning: Development, evaluation, and health promotion'

Deep learning - Thu, 2025-05-15 06:00

Acute Med Surg. 2025 May 14;12(1):e70065. doi: 10.1002/ams2.70065. eCollection 2025 Jan-Dec.

NO ABSTRACT

PMID:40370970 | PMC:PMC12077104 | DOI:10.1002/ams2.70065

Categories: Literature Watch

Quantitative assessment of lung opacities from CT of pulmonary artery imaging data in COVID-19 patients: artificial intelligence versus radiologist

Deep learning - Thu, 2025-05-15 06:00

BJR Open. 2025 Apr 29;7(1):tzaf008. doi: 10.1093/bjro/tzaf008. eCollection 2025 Jan.

ABSTRACT

OBJECTIVES: Artificial intelligence (AI) deep learning algorithms trained on non-contrast CT scans effectively detect and quantify acute COVID-19 lung involvement. Our study explored whether radiological contrast affects the accuracy of AI-measured lung opacities, potentially impacting clinical decisions. We compared lung opacity measurements from AI software with visual assessments by radiologists using CT pulmonary angiography (CTPA) images of early-stage COVID-19 patients.

METHODS: This prospective single-centre study included 18 COVID-19 patients who underwent CTPA due to suspected pulmonary embolism. Patient demographics, clinical data, and 30-day and 90-day mortality were recorded. AI tool (Pulmonary Density Plug-in, AI-Rad Companion Chest CT, SyngoVia; Siemens Healthineers, Forchheim, Germany) was used to estimate the quantity of opacities. Visual quantitative assessments were performed independently by 2 radiologists.

RESULTS: There was a positive correlation between radiologist estimations (r 2 = 0.57) and between the AI data and the mean of the radiologists' estimations (r 2 = 0.70). Bland-Altman plot analysis showed a mean bias of +3.06% between radiologists and -1.32% between the mean radiologist vs AI, with no outliers outside 2×SD for respective comparison.

The AI protocol facilitated a quantitative assessment of lung opacities and showed a strong correlation with data obtained from 2 independent radiologists, demonstrating its potential as a complementary tool in clinical practice.

CONCLUSION: In assessing COVID-19 lung opacities in CTPA images, AI tools trained on non-contrast images, provide comparable results to visual assessments by radiologists.

ADVANCES IN KNOWLEDGE: The Pulmonary Density Plug-in enables quantitative analysis of lung opacities in COVID-19 patients using contrast-enhanced CT images, potentially streamlining clinical workflows and supporting timely decision-making.

PMID:40370862 | PMC:PMC12077292 | DOI:10.1093/bjro/tzaf008

Categories: Literature Watch

Precision enhancement in wireless capsule endoscopy: a novel transformer-based approach for real-time video object detection

Deep learning - Thu, 2025-05-15 06:00

Front Artif Intell. 2025 Apr 30;8:1529814. doi: 10.3389/frai.2025.1529814. eCollection 2025.

ABSTRACT

BACKGROUND: Wireless Capsule Endoscopy (WCE) enables non-invasive imaging of the gastrointestinal tract but generates vast video data, making real-time and accurate abnormality detection challenging. Traditional detection methods struggle with uncontrolled illumination, complex textures, and high-speed processing demands.

METHODS: This study presents a novel approach using Real-Time Detection Transformer (RT-DETR), a transformer-based object detection model, specifically optimized for WCE video analysis. The model captures contextual information between frames and handles variable image conditions. It was evaluated using the Kvasir-Capsule dataset, with performance assessed across three RT-DETR variants: Small (S), Medium (M), and X-Large (X).

RESULTS: RT-DETR-X achieved the highest detection precision. RT-DETR-M offered a practical trade-off between accuracy and speed, while RT-DETR-S processed frames at 270 FPS, enabling real-time performance. All three models demonstrated improved detection accuracy and computational efficiency compared to baseline methods.

DISCUSSION: The RT-DETR framework significantly enhances precision and real-time performance in gastrointestinal abnormality detection using WCE. Its clinical potential lies in supporting faster and more accurate diagnosis. Future work will focus on further optimization and deployment in endoscopic video analysis systems.

PMID:40370809 | PMC:PMC12075415 | DOI:10.3389/frai.2025.1529814

Categories: Literature Watch

High-precision lung cancer subtype diagnosis on imbalanced exosomal data via Exo-LCClassifier

Deep learning - Thu, 2025-05-15 06:00

Front Genet. 2025 Apr 30;16:1583081. doi: 10.3389/fgene.2025.1583081. eCollection 2025.

ABSTRACT

BACKGROUND AND OBJECTIVE: Gene expression analysis plays a critical role in lung cancer research, offering molecular feature-based diagnostic insights that are particularly effective in distinguishing lung cancer subtypes. However, the high dimensionality and inherent imbalance of gene expression data create significant challenges for accurate diagnosis. This study aims to address these challenges by proposing an innovative deep learning-based method for predicting lung cancer subtypes.

METHODS: We propose a method called Exo-LCClassifier, which integrates feature selection, one-dimensional convolutional neural networks (1D CNN), and an improved Wasserstein Generative Adversarial Network (WGAN). First, differential gene expression analysis was performed using DESeq2 to identify significantly expressed genes from both normal and tumor tissues. Next, the enhanced WGAN was applied to augment the dataset, addressing the issue of sample imbalance and increasing the diversity of effective samples. Finally, a 1D CNN was used to classify the balanced dataset, thereby improving the model's diagnostic accuracy.

RESULTS: The proposed method was evaluated using five-fold cross-validation, achieving an average accuracy of 0.9766 ± 0.0070, precision of 0.9762 ± 0.0101, recall of 0.9827 ± 0.0050, and F1-score of 0.9793 ± 0.0068. On an external GEO lung cancer dataset, it also showed strong performance with an accuracy of 0.9588, precision of 0.9558, recall of 0.9678, and F1-score of 0.9616.

CONCLUSION: This study addresses the critical challenge of imbalanced learning in lung cancer gene expression analysis through an innovative computational framework. Our solution integrates three advanced techniques: (1) DESeq2 for differential expression analysis, (2) WGAN for data augmentation, and (3) 1D CNN for feature learning and classification. The source codes are publicly available at: https://github.com/lanlinxxs/Exo-classifier.

PMID:40370696 | PMC:PMC12075553 | DOI:10.3389/fgene.2025.1583081

Categories: Literature Watch

Task-specific deep learning-based denoising for UHR cardiac PCD-CT adaptive to imaging conditions and patient characteristics: Impact on image quality and clinical diagnosis and quantitative assessment

Deep learning - Thu, 2025-05-15 06:00

Proc SPIE Int Soc Opt Eng. 2025 Feb;13405:134050L. doi: 10.1117/12.3047283. Epub 2025 Apr 8.

ABSTRACT

Ultra-high-resolution (UHR) photon-counting detector (PCD) CT offers superior spatial resolution compared to conventional CT, benefiting various clinical areas. However, the UHR resolution also significantly increases image noise, which can limit its clinical adoption in areas such as cardiac CT. In clinical practice, this image noise varies substantially across imaging conditions, such as different diagnostic tasks, patient characteristics (e.g., size), scan protocols, and image reconstruction settings. To address these challenges and provide the full potential of PCD-CT for optimal clinical performance, a convolutional neural network (CNN) denoising algorithm was developed, optimized, and tailored to each specific set of conditions. The algorithm's effectiveness in reducing noise and its impact on coronary artery stenosis quantification across different patient size categories (small: water equivalent diameter <300 mm, medium: 300-320 mm, and large: >320 mm) were objectively assessed. Reconstruction kernels at different sharpness, from Bv60 to Bv76, were investigated to determine optimal settings for each patient size regarding image quality and quantitative assessment of coronary stenosis (in terms of percent diameter stenosis). Our findings indicate that for patients with a water equivalent diameter less than 320 mm, CNN-denoised Bv72 images provide optimal image quality, less blooming artifact, and reduced percent diameter stenosis compared to routine images, while for patients with water equivalent diameter over 320 mm, CNN-denoised Bv60 images are preferable. Quantitatively, the CNN reduces noise-by 85% compared to the input images and 53% compared to commercial iterative reconstructions at strength 4 (QIR4)-while maintaining high spatial resolution and a natural noise texture. Moreover, it enhances stenosis quantification by reducing the percent diameter stenosis measurement by 52% relative to the input and 24% relative to QIR4. These improvements demonstrate the capability of CNN denoising in UHR PCD-CT to enhance image quality and quantitative assessment of coronary artery disease in a manner that is adaptive to patient characteristics and imaging conditions.

PMID:40370652 | PMC:PMC12076256 | DOI:10.1117/12.3047283

Categories: Literature Watch

NDDRF 2.0: An update and expansion of risk factor knowledge base for personalized prevention of neurodegenerative diseases

Systems Biology - Thu, 2025-05-15 06:00

Alzheimers Dement. 2025 May;21(5):e70282. doi: 10.1002/alz.70282.

ABSTRACT

INTRODUCTION: Neurodegenerative diseases (NDDs) are chronic diseases caused by brain neuron degeneration, requiring systematic integration of risk factors to address their heterogeneity. Established in 2021, Knowledgebase of Risk Factors for Neurodegenerative Diseases (NDDRF) was the first knowledge base to consolidate NDD risk factors. NDDRF 2.0 expands focus to modifiable lifestyle-related factors, enhancing utility for NDD prevention.

METHODS: Data from the past 4 years were comprehensively updated, while lifestyle factors were manually collected and filtered from 1975 to 2024. Each factor was embedded with International Classification of Diseases codes and clinical stage annotations, and then re-standardized, classified, and annotated in accordance with the Unified Medical Language System Semantic Network.

RESULTS: NDDRF 2.0 encompasses 1971 risk factors classified under 151 subcategories across 20 NDDs, including 536 lifestyle-related factors covering six major categories and is freely accessible at http://sysbio.org.cn/NDDRF/.

DISCUSSION: As the first lifestyle-specific and holistic knowledge base for NDDs, NDDRF 2.0 offers structured and deep phenotype information, enabling personalized prevention strategies and clinical decision support.

HIGHLIGHTS: An enhanced lifestyle-specific and holistic knowledge base (Knowledgebase of Risk Factors for Neurodegenerative Diseases [NDDRF] 2.0) was built for neurodegenerative diseases (NDDs). NDDRF 2.0 provides detailed categorization and deep phenotypes to support targeted NDD prevention. NDDRF 2.0 provides a knowledge-driven resource that facilitates personalized risk assessment and proactive health management. NDDRF 2.0 provides clinicians, researchers, and at-risk populations with knowledge to develop and implement effective risk prevention strategies. NDDRF 2.0 can be used to build chatbots by enhancing large language models in the future.

PMID:40371632 | DOI:10.1002/alz.70282

Categories: Literature Watch

Synergistic Network Pharmacology: Preclinical Validation and Clinical Safety in Acute Ischemic Stroke

Systems Biology - Thu, 2025-05-15 06:00

J Am Heart Assoc. 2025 May 15:e039098. doi: 10.1161/JAHA.124.039098. Online ahead of print.

ABSTRACT

BACKGROUND: Most human disease definitions, except for rare and communicable diseases, are based on symptoms in specific organs, not on causal molecular mechanisms. This limits treatments to imprecise symptomatic approaches with high numbers needed to treat. Systems medicine, instead, has a holistic approach and defines diseases in an organ-agnostic manner on the basis of associated risk genes, their encoded proteins, and protein-protein interactions. Dysregulation of such disease modules is best corrected by multitarget, synergistic network pharmacology. Here we test this principle in acute ischemic stroke, a highly unmet medical indication without any approved neuroprotective drug so far.

METHODS: We extend 3 validated risk genes, neuronal nitric oxide synthase (NOS1), NADPH oxidase 5 (NOX5), and soluble guanylate cyclase (sGC), to a single disease module. For preclinical validation, we used C57/Bl6 mice and humanized NOX5-knock-in mice because NOX5 is not present in the mouse genome despite playing a key role in early stroke. Because up to 70% of patients with stroke have diabetes or prediabetes as an aggravating comorbidity, we also induced diabetes in these mice to model the increased clinical risk for hemorrhagic transformation.

RESULTS: We found that a triple-drug combination of a NOX inhibitor, a nitric oxide synthase inhibitor, and an sGC activator reduced infarct size and, in diabetic animals, also prevented hemorrhagic transformation. Reducing each individual compound dose to subthreshold levels still resulted in full protection when combined, typical for supra-additive network pharmacology. To examine clinical safety, 3 drugs, either marketed for sGC or repurposed for nitric oxide synthase and NADPH oxidase, were administered to healthy volunteers in a phase I trial.

CONCLUSIONS: Our data establish that a mechanism-based network pharmacology approach is effective and clinically safe, warranting a currently ongoing first-in-class neuroprotective phase II interventional trial.

REGISTRATION: URL: https://clinicaltrials.gov/study/NCT05762146?term=repo-stroke&rank=1; Unique Identifier: NCT05762146.

PMID:40371623 | DOI:10.1161/JAHA.124.039098

Categories: Literature Watch

Dirac-equation signal processing: Physics boosts topological machine learning

Systems Biology - Thu, 2025-05-15 06:00

PNAS Nexus. 2025 May 2;4(5):pgaf139. doi: 10.1093/pnasnexus/pgaf139. eCollection 2025 May.

ABSTRACT

Topological signals are variables or features associated with both nodes and edges of a network. Recently, in the context of topological machine learning, great attention has been devoted to signal processing of such topological signals. Most of the previous topological signal processing algorithms treat node and edge signals separately and work under the hypothesis that the true signal is smooth and/or well approximated by a harmonic eigenvector of the higher-order Laplacian, which may be violated in practice. Here, we propose Dirac-equation signal processing, a framework for efficiently reconstructing true signals on nodes and edges, also if they are not smooth or harmonic, by processing them jointly. The proposed physics-inspired algorithm is based on the spectral properties of the topological Dirac operator. It leverages the mathematical structure of the topological Dirac equation to boost the performance of the signal processing algorithm. We discuss how the relativistic dispersion relation obeyed by the topological Dirac equation can be used to assess the quality of the signal reconstruction. Finally, we demonstrate the improved performance of the algorithm with respect to previous algorithms. Specifically, we show that Dirac-equation signal processing can also be used efficiently if the true signal is a nontrivial linear combination of more than one eigenstate of the Dirac equation, as it generally occurs for real signals.

PMID:40371396 | PMC:PMC12076202 | DOI:10.1093/pnasnexus/pgaf139

Categories: Literature Watch

A map of integrated cis-regulatory elements enhances gene regulatory analysis in maize

Systems Biology - Thu, 2025-05-15 06:00

Plant Commun. 2025 May 13:101376. doi: 10.1016/j.xplc.2025.101376. Online ahead of print.

ABSTRACT

Cis-regulatory elements (CREs) are non-coding DNA sequences that modulate gene expression. Their identification is critical to study the transcriptional regulation of genes controlling key traits that govern plant growth and development. They are also crucial components for the delineation of gene regulatory networks, which represent regulatory interactions between transcription factors (TFs) and target genes. In maize, CREs have been profiled using different computational and experimental methods, but the extent to which these methods complement each other in identifying functional CREs is unclear. Here, we report the data-driven integration of different maize CRE profiling methods to optimize the capture of experimentally-confirmed TF binding sites, resulting in maps of integrated CREs (iCREs) showing increased levels of completeness and precision. We combined the iCREs with a wide diversity of gene expression data under drought conditions to perform motif enrichment and infer drought-specific GRNs. Mining these organ-specific GRNs revealed known and novel candidate regulators of maize drought response, and showed these networks significantly overlap with drought eQTL regulatory interactions. Furthermore, by studying the transposable elements (TEs) overlapping with iCREs, we identified few TE superfamilies displaying typical epigenetic features of regulatory DNA that are potentially involved in wiring specific TF-target gene regulatory interactions. Overall, our study showcases the integration of different omics data sources to generate a high-quality collection of CREs, together with their applicability to better characterize gene regulation in the complex maize genome.

PMID:40369872 | DOI:10.1016/j.xplc.2025.101376

Categories: Literature Watch

Role and mechanisms of exercise therapy in enhancing drug treatment for glioma: a review

Drug-induced Adverse Events - Thu, 2025-05-15 06:00

Front Immunol. 2025 Apr 30;16:1576283. doi: 10.3389/fimmu.2025.1576283. eCollection 2025.

ABSTRACT

Gliomas, particularly glioblastoma (GBM), are among the most aggressive and challenging brain tumors to treat. Although current therapies such as chemotherapy, radiotherapy, and targeted treatments have extended patient survival to some extent, their efficacy remains limited and is often accompanied by severe side effects. In recent years, exercise therapy has gained increasing attention as an adjunctive treatment in clinical and research settings. Exercise not only improves patients' physical function and cognitive abilities but may also enhance the efficacy of conventional drug treatments by modulating the immune system, suppressing inflammatory responses, and improving blood-brain barrier permeability. This review summarizes the potential mechanisms of exercise in glioma treatment, including enhancing immune surveillance through activation of natural killer (NK) cells and T cells, and increasing drug penetration by improving blood-brain barrier function. Additionally, studies suggest that exercise can synergize with chemotherapy and immunotherapy, improving treatment outcomes while reducing drug-related side effects. Although the application of exercise therapy in glioma patients is still in the exploratory phase, existing evidence indicates its significant clinical value as an adjunctive approach, with the potential to become a new standard in glioma treatment in the future.

PMID:40370453 | PMC:PMC12075166 | DOI:10.3389/fimmu.2025.1576283

Categories: Literature Watch

Referral Criteria for Specialist Palliative Care for Patients With Dementia

Cystic Fibrosis - Wed, 2025-05-14 06:00

JAMA Netw Open. 2025 May 1;8(5):e2510298. doi: 10.1001/jamanetworkopen.2025.10298.

ABSTRACT

IMPORTANCE: Patients with dementia have considerable supportive care needs. Specialist palliative care may be beneficial, but it is unclear which patients are most appropriate for referral and when they should be referred.

OBJECTIVE: To identify a set of consensus referral criteria for specialist palliative care for patients with dementia.

DESIGN, SETTING, AND PARTICIPANTS: In this survey study using 3 rounds of Delphi surveys, an international, multidisciplinary panel of clinicians from 5 continents with expertise in the integration of dementia and palliative care were asked to rate 83 putative referral criteria (generated from a previous systematic review and steering committee discussion). Specialist palliative care was defined as an interdisciplinary team consisting of practitioners with advanced knowledge and skills in palliative medicine offering consultative services for specialist-level palliative care in (nonhospice) inpatient, outpatient, community, and home-based settings.

MAIN OUTCOMES AND MEASURES: Consensus was defined a priori as at least 70% agreement among experts. A criterion was coded as major if the experts advocated that meeting 1 criterion alone was satisfactory to justify a referral. Data were summarized using descriptive statistics.

RESULTS: Of the 63 invited and eligible panelists, the response rate was 58 (92.1%) in round 1, 58 (92.1%) in round 2, and 60 (95.2%) in round 3. Of the 58 panelists who provided demographic data in round 1, most were aged 40 to 49 years (28 of 58 [48.3%]), and 29 panelists (50%) each were men and women. Panelists achieved consensus on 15 major and 42 minor criteria for specialist palliative care referral. The 15 major criteria were grouped under 5 categories, including dementia type (eg, rapidly progressive dementia), symptom distress (eg, severe physical symptoms), psychosocial factors or decision-making (eg, request for hastened death, assisted suicide, or euthanasia), comorbidities or complications (eg, ≥2 episodes of aspiration pneumonia in the past 12 months); and hospital use (eg, ≥2 hospitalizations within the past 3 months).

CONCLUSIONS AND RELEVANCE: In this Delphi survey study, international experts reached consensus on a range of criteria for referral to specialist palliative care. With testing and validation, these criteria may be used to standardize specialist palliative care access for patients with dementia across various care settings.

PMID:40366652 | PMC:PMC12079294 | DOI:10.1001/jamanetworkopen.2025.10298

Categories: Literature Watch

Spatial transcriptomics reveals human cortical layer and area specification

Deep learning - Wed, 2025-05-14 06:00

Nature. 2025 May 14. doi: 10.1038/s41586-025-09010-1. Online ahead of print.

ABSTRACT

The human cerebral cortex is composed of six layers and dozens of areas that are molecularly and structurally distinct1-4. Although single-cell transcriptomic studies have advanced the molecular characterization of human cortical development, a substantial gap exists owing to the loss of spatial context during cell dissociation5-8. Here we used multiplexed error-robust fluorescence in situ hybridization (MERFISH)9, augmented with deep-learning-based nucleus segmentation, to examine the molecular, cellular and cytoarchitectural development of the human fetal cortex with spatially resolved single-cell resolution. Our extensive spatial atlas, encompassing more than 18 million single cells, spans eight cortical areas across seven developmental time points. We uncovered the early establishment of the six-layer structure, identifiable by the laminar distribution of excitatory neuron subtypes, 3 months before the emergence of cytoarchitectural layers. Notably, we discovered two distinct modes of cortical areal specification during mid-gestation: (1) a continuous, gradual transition observed across most cortical areas along the anterior-posterior axis and (2) a discrete, abrupt boundary specifically identified between the primary (V1) and secondary (V2) visual cortices as early as gestational week 20. This sharp binary transition in V1-V2 neuronal subtypes challenges the notion that mid-gestation cortical arealization involves only gradient-like transitions6,10. Furthermore, integrating single-nucleus RNA sequencing with MERFISH revealed an early upregulation of synaptogenesis in V1-specific layer 4 neurons. Collectively, our findings underscore the crucial role of spatial relationships in determining the molecular specification of cortical layers and areas. This study establishes a spatially resolved single-cell analysis paradigm and paves the way for the construction of a comprehensive developmental atlas of the human brain.

PMID:40369074 | DOI:10.1038/s41586-025-09010-1

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