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As the primary source of noradrenaline in the brain, the locus coeruleus (LC) regulates arousal, avoidance and stress responses1,2. However, how local neuromodulatory inputs control LC function remains unresolved. Here we identify a population of transcriptionally, spatially and functionally diverse GABAergic (γ-aminobutyric acid-producing) neurons in the LC dendritic field that receive distant inputs and modulate modes of LC firing to control global arousal levels and arousal-related processing and behaviours. We define peri-LC anatomy using viral tracing and combine single-cell RNA sequencing with spatial transcriptomics to molecularly define both LC noradrenaline-producing and peri-LC cell types. We identify several neuronal cell types that underlie peri-LC functional diversity using a series of complementary neural circuit approaches in behaving mice. Our findings indicate that LC and peri-LC neurons are transcriptionally, functionally and anatomically heterogenous neuronal populations that modulate arousal and avoidance states. Defining the molecular, cellular and functional diversity of the LC and peri-LC provides a roadmap for understanding the neurobiological basis of arousal, motivation and neuropsychiatric disorders.
The influence of sleep environments on sleep quality is well-established; however, the specific role of mattress design remains underexplored. Existing studies focus primarily on ergonomic aspects, such as pressure relief and spinal support, yet lack conclusive evidence linking these features to improved sleep quality.
One of the first livestock that humans domesticated was the goat. They give people access to vital supplies. However, the exploration and conservation of the genetic resources of goats are not comprehensive enough. Here, we generated whole-genome sequencing data for 35 samples from three populations (Tongjiang, Banjiao, and Chuandong white) and downloaded the genome sequence data of 30 individuals from three breeds (Jintang black, Chengdu grey, and Tibetan cashmere) to characterize the genomic variations of Tongjiang and other goat breeds. Among the six goat populations studied, the Tongjiang goat exhibits the highest levels of observed heterozygosity and runs of homozygosity, alongside the lowest inbreeding coefficient. The nucleotide diversity and linkage disequilibrium in this population were observed to be at intermediate levels. The population genetic structure analysis showed that significant differentiation of Tongjiang goats from other goat breeds, as evidenced by their distinct clustering and considerable genetic distance from other groups. Furthermore, based on selective sweeps, we identified positive selection genes in Tongjiang goats, which were probably related to important traits such as development (BMP4), reproduction (HTR1E), meat quality (HDAC9, PITX2, and PDGFD), and immune response (IKBKB and DLG1). Our findings indicate that Tongjiang goats possess elevated genomic diversity and exhibit minimal inbreeding. The unique genetic structure of Tongjiang goats can be partly attributed to the specific geographic conditions of the region. We have identified several selection signatures within the genomic regions of Tongjiang goats, which may play a role in their meat quality and environmental adaptation. All of our findings have the potential to provide an invaluable genomic resource for future genetic research and conservation efforts.
The Deauville criteria are recommended for PET/CT-based treatment response evaluation in extranodal NK/T-cell lymphoma (ENKTL) but have limited prognostic value. Therefore, we conducted a retrospective study of 340 nasal-type ENKTL patients to develop new criteria (Huaxi criteria) and validate them for assessing therapeutic response and survival outcome. 80% (140/175) of the patients who did not receive any anticancer therapy after the end-of-treatment PET/CT (EOT-PET/CT) and had a progression-free survival > 24 months were randomly selected as subjects for developing Huaxi criteria. On EOT-PET/CT, the SUVmax of initial and new lesions at each site (including the upper aerodigestive tract [UADT] and nodal and extranodal sites) and liver SUVmax were measured to calculate the lesion-to-liver ratio (LLR). The 99th percentile upper-reference limits of the LLRs of lesions at each site were used to divide the lesion response into complete metabolic response (CMR) and non-CMR/new tumor. The Huaxi criteria were then established using an LLR-based 3-point scoring system. Interreader agreement was assessed using kappa statistics. Kaplan‒Meier and Cox regression analyses were used to compare survival outcomes. The prognostic ability was assessed using the hazard ratio (HR), which was calculated via univariate Cox regression analysis. The results showed that the LLR thresholds for assessing CMR and non-CMR/new tumor at the UADT and nodal and extranodal sites were 2.0, 1.5 and 1.0, respectively. The Huaxi criteria were employed to score the lesions at each site using the LLR-based 3-point scale, with the highest score denoting the overall response. Scores 1 and 2 represent CMR, and score 3 represents non-CMR. Interreader agreement was substantial for the Huaxi criteria but only moderate-substantial for the Deauville criteria (κ, 0.663‒0.756 vs. 0.454‒0.711). The Huaxi criteria improved the positive predictive value (PPV) for prognosis from 21.9‒41.4% with the Deauville criteria to 53.4‒73.1%. The Huaxi criteria were an independent prognostic factor at EOT and interim (all P < 0.001), with better predictive performance than the Deauville criteria (HR, 5.25‒11.56 vs. 1.59‒3.66, all P < 0.05). In conclusion, the Huaxi criteria are concise, with substantial interreader agreement and a high PPV for prognosis, and can independently predict outcomes in nasal-type ENKTL patients.
N6-methyladenosine (m6A) modification plays pivotal roles in myriad biological processes. The YTH domain family protein YTHDF2, recognized as an m6A "reader" protein, is primarily associated with the canonical function of facilitating RNA degradation. Nevertheless, the intricate non-decay regulatory mechanism exerted by YTHDF2 remains enigmatic. Here, using ovarian cancer as a model, we demonstrate that YTHDF2 forms a tangible interaction with the eukaryotic translation initiation factor eIF3F and the RNA helicase DDX1, thereby enhancing protein synthesis in tumor cells. Instead of promoting RNA degradation, YTHDF2 facilitates the translation of m6A-modified mRNAs encoding microtubule-associated proteins, which drives cancer progression and reduces the chemosensitivity of cancer cells to paclitaxel, a commonly used chemotherapy drug. Notably, through virtual screening, we identified a YTHDF2-specific small-molecule inhibitor. Therapeutic targeting of YTHDF2 with this inhibitor effectively suppresses protein translation in tumor cells and reverses paclitaxel resistance.
Bullous pemphigoid (BP) is a chronic autoimmune condition characterized by painful blistering wounds. While effective, conventional treatments often have significant side effects. This study evaluates the therapeutic efficacy of Ozone Liquid Dressing (OLD), an innovative adjunct treatment, in enhancing wound healing, reducing infection rates, and alleviating pain associated with BP. A total of 120 BP patients were assigned to either an observation group (standard care + OLD) or a control group (standard care alone). The dressing was applied daily until wound healing, or the two-week observation period concluded. Efficacy was measured by healing rates, infection reduction (assessed by positive bacterial cultures in wound exudates), and pain levels (assessed by the Numeric Rating Scale, NRS). Statistical analyses were performed using SPSS software, employing t-tests and Chi-square tests as appropriate. The observation group showed significantly higher complete healing rates (61.70% vs. 38.33%, p < 0.05) compared to the control group. In terms of overall efficacy, the observation group achieved 91.70%, compared to the control group's 80.00% (p = 0.116). A marked reduction in positive bacterial cultures was observed in the observation group, beginning on day 3 (p < 0.01), and pain scores decreased significantly by day 10 (p < 0.001). OLD significantly enhances wound healing and reduces pain in BP patients, demonstrating clinical potential. Further studies are necessary to confirm the long-term benefits and clinical applicability of OLD in managing BP wounds.
This study aimed to develop an interpretable machine learning model to predict methylene blue (MB) responsiveness in adult patients with refractory septic shock and to identify key factors influencing MB responsiveness using the SHapley Additive exPlanations (SHAP) approach. We retrospectively analyzed data from 416 adult patients with refractory septic shock who received MB treatment at Xiangya Hospital of Central South University between June 2018 and October 2022. MB responders were defined as patients who, within 6 hours after MB administration, exhibited either a reduction in average norepinephrine equivalence (NEE) of ≥ 10% or an increase in mean arterial pressure of ≥ 10 mmHg without an associated increase in NEE. The incidence of MB responders was 38.2%(n=159). Statistical and machine learning methods were used for feature selection, resulting in two datasets (ST and ML). Each dataset was randomly divided into a training set (75%) for model development and a testing set (25%) for internal validation. Prediction models were developed using logistic regression, support vector machine (SVM), random forest, light gradient boosting machine (LightGBM), and explainable boosting machine (EBM). The models were evaluated regarding discrimination, calibration, and clinical benefit. The SVM model trained on the ML dataset demonstrated the best predictive performance, with an area under the curve (AUC) of 0.74 (95% CI 0.62-0.84), 76% accuracy, 36% sensitivity, and 94% specificity. Although the model's sensitivity was low, its high specificity and the safety profile of MB underscore its clinical relevance. The model showed superior net benefit within a 24-85% threshold probability, as determined by decision curve analysis. The SHAP analysis identified the average NEE dose within 6 hours before MB initiation as the most important factor influencing MB responsiveness (P<0.01), with higher doses positively correlating with a greater likelihood of response. Lactate levels were identified as the second most important factor. The optimal model was externally validated in an independent cohort from the same institution, achieving an AUC of 0.75 and an accuracy of 74%.
Pediatric thrombosis is a relatively rare but severe condition in the field of pediatrics, with far-reaching consequences. Recent studies have indicated a rising incidence of this disease in children over the years. Additionally, the pharmacological treatment of thrombotic diseases in children faces numerous challenges. Due to significant physiological differences between children and adults, guidelines for the prevention and treatment of thrombotic diseases in adults cannot be directly applied to pediatric patients.
Hepatic ischemia/reperfusion injury (IRI) commonly complicates liver transplantation (LT). However, the precise mechanisms underlying hepatic IRI remain incompletely understood. We acquired single-cell RNA sequencing (scRNA-seq) and transcriptome RNA sequencing data of LT patients from the GEO database. Employing scRNA-seq, we delved into the interplay between non-immune and immune cells in hepatic IRI, pinpointing genes exhibiting altered expression patterns. Integrating insights gleaned from scRNA-seq and transcriptome RNA sequencing datasets, we deepened our comprehension of cellular interactions and underlying mechanisms in hepatic IRI. Additionally, we conducted preliminary validation of identified gene expression alterations using immunofluorescence techniques. Using scRNA-seq, we detected significant changes in the populations of liver sinusoidal endothelial cells (LSECs) and monocytes after hepatic ischemia-reperfusion injury (IRI). By integrating scRNA-seq with bulk transcriptome RNA sequencing data, we identified key genes with dysregulated expression in LSECs (ICAM1, SOCS3, NFKBIZ, JUND, TNFRSF12A and HSPA6) and monocytes (SOCS3, JUND, FPR2 and NR4A2). Our analysis of cell communication indicated that the ANXA1-FPR2 axis might be a pivotal signature in mediating interactions between LSECs and monocytes. We then established a mouse model for IRI, and further analyses using flow cytometry and immunofluorescence showed a significant increase in monocyte proportion post-IR (p < 0.01). Consistently, Western Blot also revealed significant upregulation of ANXA1 and FPR2 (p < 0.01). Our study elucidated the cellular interactions and signalling pathways following IRI. The interplay between LSECs and monocytes likely triggers a cascade of events, promoting monocyte infiltration and amplifying inflammatory responses, thus worsening the deleterious effects of IRI.
Stroke is a significant health threat, and its complex interplay with fractures warrants further investigation. Depression, a critical psychological mediator in various health conditions, may also play a role. This study aims to clarify the intricate relationships among stroke, depressive symptoms, and fracture risk, potentially informing more holistic clinical strategies.
Noise exposure is one of the most common causes of hearing loss and hyperacusis. Studies have shown that noise exposure can induce a cortical gain to compensate for reduced input of the cochlea, which may contribute to the increased sound sensitivity. However, many people with hyperacusis have no measurable cochlear lesion after being exposed to loud sound. In this experiment, we studied the neurological alterations in the cortical and subcortical areas following a prolonged moderate level of noise exposure (84 dB SPL, 8 h/day for 4 weeks) in the laboratory mice. The cochlear function was monitored by auditory brainstem responses (ABRs). The behavioral auditory sensitivity and temporal processing were evaluated using the acoustic startle response (ASR) and gap-induced prepulse inhibition (gap-PPI). The central auditory functions were determined by electrophysiological recordings of the inferior colliculus (IC) and the auditory cortex (AC). Our results showed that although there was no significant difference in the ABR thresholds, the noise group showed enhanced ASR and gap-PPI compared to the control group. Increased neural activity in both the IC and the AC was recorded in the noise-exposed mice compared to the control group, suggesting a central gain in both the subcortical and cortical regions. The current source density (CSD) analysis of the AC response revealed an increased columnar excitation and reduced corticocortical projection in the noise group, different from the central gain model of noise-induced hearing loss. Our results suggest that chronic "nondestructive" noise can increase the gain of the central auditory system by altering the balance of auditory thalamocortical and intracortical inputs, which may contribute to the increased sound sensitivity in people with normal hearing.
A backtracking heuristic algorithm (BHA) was proposed for a two-dimensional rectangular strip packing problem with rotations and without guillotine cutting, which has many applications. An improved fitness strategy was used to select the fittest rectangle to be packed on a strip with a certain height. Next, a backtracking constructive heuristic was repeatedly used at a higher height until all the rectangles were packed. A multi-start improvement procedure then found the best solution by taking a different rectangle as the first rectangle, whereas the sequence of the other rectangles remained unchanged. Finally, in order to further expand the scope of the solution, a simple randomized local search procedure based on random sequences of rectangles with the first rectangle unchanged was applied to search for the optimal solution. BHA has only two parameters; it is simple and effective. Computational results on benchmark problems (zero-waste instances and non-zero-waste instances) with different scales (from 10 to 75,032 rectangles) indicate the following: (1) though it is non-deterministic, the difference between the results after each running is tiny and (2) the proposed algorithm outperforms most of the other algorithms under comparison on the whole, especially for large-scale instances with more than 1000 rectangles, which is further verified by statistical analysis and greatly meaningful in mass industrial production like metal cutting.
Ischemic brain injury results in high disability due to neuroinflammation and oxidative stress, and M1/M2 polarization of glial cells plays a key role in neuroinflammation. This research explored the protective effect of Catalpalactone on middle cerebral artery occlusion (MCAO)-induced brain injury and its underlying regulation mechanism in rats.
Although the risk of recurrent stroke is very high in patients with ischemic stroke (IS), the implementation of secondary prevention of IS has not received enough attention. Therefore, we aimed to investigate the cognition and compliance status of secondary prevention in patients with IS in southwest China and explore the factors affecting compliance with secondary prevention 1 year after discharge. We conducted a cross-sectional survey of patients with IS 1 year after discharge in southwest China through convenience sampling. Factors affecting the compliance of secondary prevention in patients with IS after discharge were analysed. A total of 1,041 patients were included in our study. Nearly one-third of patients did not follow secondary prevention measures according to the guidelines, and an improvement in lifestyle was even less likely. Living with or without children did not significantly affect patient compliance (odds ratio 1.11; 95% confidence interval 0.83-1.49; p = 0.47). Furthermore, no significant differences were observed in the probability of treatment acceptance between patients experiencing one or two of the following conditions: hypertension, diabetes, and hyperlipidemia, and those with all three conditions. Thus, patients with IS have insufficient compliance with secondary prevention and there is a particular lack of emphasis on lifestyle improvement. Further interventions are needed to improve compliance with secondary prevention in patients with IS, especially patients with all three conditions of hypertension, diabetes, and hyperlipidemia.
The estimated glucose disposal rate (eGDR) serves as a novel indicator of insulin resistance, which has been shown to correlate with cardiovascular disease risk; however, its relationship with cognitive function remains unclear.This article describes a cross-sectional study design based on data from the 2011-2014 National Health and Nutrition Examination Survey (NHANES). The Weighted logistic regression and the restricted cubic spline were employed to examine the relationship between eGDR and cognitive ability.The subjects were divided into two categories: the normal group and the cognitive function decline (CFD) group, based on their cognitive scores. There were significant differences in eGDR levels between the two groups(P = 0.001).After adjusting for relevant covariates, notable differences were found between eGDR and cognitive function when eGDR was expressed in both continuous and categorical data forms (P < 0.05). The stability of these findings was further confirmed through sensitivity analyses.This difference persisted in subgroups, including women, individuals with education beyond high school, moderate drinkers, and those who had not been diagnosed with stroke (P < 0.05). A restricted cubic spline revealed a non-linear relationship with an inflection point between the two (P-for-non-linear < 0.05, P-overall < 0.001). This study contributes to the understanding of the relationship between eGDR and cognitive performance by identifying a potential non-linear association.
As a newly emerging collaborative platform to boost regional growth and prosperity, the Belt and Road Initiative (BRI) has great potential to promote global health development. However, the overall health status of BRI countries remains unclear. We analyzed the health patterns and its geographical distribution in 149 BRI countries from 1990 to 2021.
Sepsis, characterized by high morbidity and mortality, necessitates the identification of novel diagnostic and prognostic biomarkers to enhance patient outcomes. Prior research has highlighted the potential clinical utility of long non-coding RNAs (lncRNAs) in sepsis. This study aimed to investigate the clinical significance and underlying mechanisms of serum lncRNA Cytochrome P450 family 1 subfamily B member 1 antisense RNA 1 (CYP1B1-AS1) expression in sepsis.
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