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1.
Technol Health Care ; 2024 Aug 29.
Article de Anglais | MEDLINE | ID: mdl-39269870

RÉSUMÉ

BACKGROUND: Epidural blood patch (EBP) is a minimally invasive and effective treatment for spontaneous intracranial hypotension (SIH). But, cervical epidural blood patch for SIH has little attention. OBJECTIVE: In this study, The clinical data was recorded and the treatment efficacy and safety of cervical EBP in SIH were evaluated. METHODS: : Fifty-nine cases of intractable SIH were examined by computed tomography (CT) guided cervical EBP at the Chinese PLA General Hospital from August 2014 to March 2024. RESULTS: The mean age of the fifty-nine patients at symptom onset was 40.8 ± 9.5 years. 54/59 (91.5%) patients experienced orthostatic headache. Preoperative spine T2 sacns with extensive fluid collection at the upper cervical region in 43/46 (93.5%). 45/59 (76.3%) patients had symptomatic relief with initial cervical EBP, and 14/59 (23.7%) patients received further cervical EBPs. In the first one to three days following the EBP procedure, 11 (18.6%) patients reported pain at the puncture site and 15 (25.4%) experienced neck pain. No other complications were observed during or after the procedure. At the latest follow-up, all patients showed good recovery. The mean follow-up was 28.9 ± 22.7 months. CONCLUSION: CT-guided cervical EBP is a effective and safe treatment for patients with intractable SIH, especially in patients who had extensive fluid collection at the upper cervical region.

2.
Lancet Respir Med ; 2024 Sep 18.
Article de Anglais | MEDLINE | ID: mdl-39305910

RÉSUMÉ

BACKGROUND: Neoadjuvant immunotherapy with chemotherapy improves outcomes in patients with resectable non-small-cell lung cancer (NSCLC). Given its immunomodulating effect, we investigated whether stereotactic body radiotherapy (SBRT) enhances the effect of immunochemotherapy. METHODS: The SACTION01 study was a single-arm, open-label, phase 2 trial that recruited patients who were 18 years or older and had resectable stage IIA-IIIB NSCLC from the Sun Yat-sen University Cancer Center, Guangzhou, China. Eligible patients received SBRT (24 Gy in three fractions) to the primary tumour followed by two cycles of 200 mg intravenous PD-1 inhibitor, tislelizumab, plus platinum-based chemotherapy. Surgical resection was performed 4-6 weeks after neoadjuvant treatment. The primary endpoint was major pathological response (MPR), defined as no more than 10% residual viable tumour in the resected tumour. All analyses were conducted on an intention-to-treat basis, including all patients who were scheduled for neoadjuvant treatment. The trial was registered with ClinicalTrials.gov (NCT05319574) and is ongoing but closed to recruitment. FINDINGS: Between May 18, 2022, and June 20, 2023, 46 patients (42 men and four women) were enrolled and scheduled for neoadjuvant treatment. MPR was observed in 35 (76%, 95% CI 61-87) of 46 patients. The second cycle of immunochemotherapy was withheld in four (9%) patients due to pneumonia (n=2), colitis (n=1), and increased creatinine (n=1). Grade 3 or worse adverse events related to neoadjuvant treatment occurred in 12 (26%, 95% CI 14-41) patients. The most frequent treatment-related adverse event (TRAE) was alopecia (16 [35%] patients), and the most frequent grade 3 or worse TRAE was neutropenia (six [13%]). There was one treatment-related death, caused by neutropenia. No deaths within 90 days of surgery were reported. INTERPRETATION: Preoperative SBRT followed by immunochemotherapy is well tolerated, feasible, and leads to a clinically significant MPR rate. Future randomised trials are warranted to support these findings. FUNDING: BeiGene.

3.
Singapore Med J ; 2024 Sep 17.
Article de Anglais | MEDLINE | ID: mdl-39287509

RÉSUMÉ

INTRODUCTION: This study aimed to evaluate a technique of using photoplethysmography (PPG) for detecting elevated blood glucose in individuals. METHOD: This is a prospective, cross-sectional study in which 500 healthy volunteers were recruited at a tertiary hospital in Singapore from October 2021 to February 2023. Capillary glucose was measured concurrently with PPG signals acquired using the wrist-worn Actxa Tracker (Spark + Series 2) and the In-Ear Prototype model SVT, which were worn for a duration of 8 min. Participants with a capillary blood test reading ≤11.1 mmol/dL had to consume a standard glucose tolerance drink and return 1 h later for a second capillary blood test. Two hundred and forty-four features were subsequently extracted from the PPG signals. RESULTS: Of the 500 volunteers, 17 were excluded because of incomplete records. This led to a total of 483 participants' records being included in the final analysis. For predicting elevated capillary blood glucose level, demographics alone achieved an area under the curve (AUC) of 0.75. When wearable features derived from PPG were combined with demographics, AUC improved significantly to 0.82 (P = 0.0001). CONCLUSION: This study shows that a non-invasive method of assessing diabetes mellitus risk using PPG combined with demographics is a viable option to provide a cheaper and more accessible modality for population-wide diabetes mellitus risk assessment.

4.
Int Immunopharmacol ; 142(Pt B): 113183, 2024 Sep 18.
Article de Anglais | MEDLINE | ID: mdl-39298815

RÉSUMÉ

Children all over the world suffer from atopic dermatitis (AD), a prevalent condition that impairs their health. Corticosteroids, which have long-term negative effects, are frequently used to treat AD. There has been a growing body of research on the gut microbiota's function in AD. Nevertheless, the function and underlying mechanisms of fecal microbiota transplantation (FMT) in AD children remain to be established. Therefore, in order to assess the preventive effects of FMT treatment on AD and investigate the mechanisms, we constructed an ovalbumin (OVA)-induced juvenile mouse AD model in this investigation. This study explored the role and mechanism of FMT treatment in AD through 16S RNA sequencing, pathological histological staining, molecular biology, and Flow cytometry. Results demonstrated that the FMT treatment improved the gut microbiota's diversity and composition, bringing it back to a level similar to that of a close donor. Following FMT treatment, OVA-specific antibodies were inhibited, immunoglobulin (Ig) E production was decreased, the quantity of mast cells and eosinophils was decreased, and specific inflammatory markers in the skin and serum were decreased. Further mechanistic studies revealed that FMT treatment induced CD103+ DCs and programmed cell death ligand 1 (PD-L1)/programmed cell death 1 (PD-1) expression in skin-draining lymph nodes and promoted Treg production to induce immune tolerance and suppress skin inflammation. Meanwhile, changes in the gut microbiota were substantially correlated with Th2 cytokines, OVA-specific antibodies, and PD-L1/PD-1. In conclusion, FMT regulates the Th1/Th2 immunological balance and the gut microbiota. It may also inhibit AD-induced allergy responses through the PD-L1/PD-1 pathway, and providing a unique idea and possibly a fresh approach to the treatment of AD.

5.
Carbohydr Polym ; 344: 122531, 2024 Nov 15.
Article de Anglais | MEDLINE | ID: mdl-39218553

RÉSUMÉ

The overuse of pesticides has shown their malpractices. Novel and sustainable formulations have consequently attracted abundant attention but still appear to have drawbacks. Here, we use a maleic anhydride-functionalized cellulose nanocrystals-stabilized Pickering emulsions template to prepare thermo-responsive microcapsules for a pesticide delivery system via radical polymerization with N-isopropyl acrylamide. The microcapsules (MACNCs-g-NIPAM) are characterized by the microscope, SEM, FTIR, XRD, TG-DTG, and DSC techniques. Imidacloprid (IMI) is loaded on MACNCs-g-NIPAM to form smart release systems (IMI@MACNCs-g-NIPAM) with high encapsulation efficiency (~88.49%) and loading capability (~55.02%). The IMI@MACNCs-g-NIPAM present a significant thermo-responsiveness by comparing the release ratios at 35°C and 25°C (76.22% vs 50.78%). It also exhibits advantages in spreadability, retention and flush resistance on the leaf surface compared with the commercial IMI water-dispersible granules (CG). IMI@MACNCs-g-NIPAM also manifest a significant advantage over CG (11.12 mg/L vs 38.90 mg/L for LC50) regarding activity tests of targeted organisms. In addition, IMI@MACNCs-g-NIPAM has shown excellent biocompatibility and low toxicity. All the benefits mentioned above prove the excellent potential of IMI@MACNCs-g-NIPAM as a smart pesticide formulation.


Sujet(s)
Capsules , Cellulose , Émulsions , Anhydrides maléiques , Nanoparticules , Pesticides , Anhydrides maléiques/composition chimique , Cellulose/composition chimique , Nanoparticules/composition chimique , Pesticides/composition chimique , Émulsions/composition chimique , Capsules/composition chimique , Animaux , Néonicotinoïdes/composition chimique , Libération de médicament , Température , Composés nitrés/composition chimique , Souris , Systèmes de délivrance de médicaments/méthodes , Vecteurs de médicaments/composition chimique , Acrylamides
6.
Ann Med Surg (Lond) ; 86(9): 5471-5475, 2024 Sep.
Article de Anglais | MEDLINE | ID: mdl-39239004

RÉSUMÉ

Introduction: Sarcomatoid renal cell carcinoma (SRCC) is clinically rare, accounting for ~1.0-1.5% of renal parenchymal tumors. Although the concept of SRCC was proposed in 1968, the molecular mechanisms and immunological characteristics of sarcomatoid changes remain unclear. In the era of targeted therapy, the overall survival (OS) of patients with SRCC is typically less than 12 months. Case presentation: This article reports a case of SRCC in an 81-year-old male. Progression-free survival (PFS) was as long as 25 months and OS was 30 months after immunotherapy and the effect was significant. This is the first report of successful use toripalimab in the treatment of SRCC. Clinical discussion: SRCC is a rare type of renal cancer with no obvious specific clinical manifestations or imaging findings, and the diagnosis of the disease is based on pathological examinations. SRCC has a high degree of malignancy, progresses rapidly, and has a poor prognosis. The effect of traditional treatment is limited, and immune checkpoint inhibitors may have therapeutic potential. Conclusions: Toripalimab may be effective and further exploration is anticipated to advance a new period of SRCC.

7.
Ageing Res Rev ; 101: 102470, 2024 Sep 06.
Article de Anglais | MEDLINE | ID: mdl-39245075

RÉSUMÉ

BACKGROUND: Motoric cognitive risk syndrome (MCR) is defined as the presence of slow gait-speed and subjective cognitive decline in older individuals without mobility disability or dementia. While some studies suggest that MCR is a pre-dementia syndrome and may help predict the risk of cognitive impairment and dementia, not all studies concur. The objective of this study is to comprehensively summarize and synthesize evidence to assess the association between MCR and cognitive impairment and dementia. METHODS: Following a pre-specified protocol, two authors systematically searched PubMed, Embase, and The Cochrane Library from inception to 19 August 2024 for observational or randomized studies pertaining to the association between MCR and cognitive impairment and dementia. We favoured maximally adjusted hazards and odds ratios to determine the longitudinal and cross-sectional risk of cognitive impairment and dementia. We investigated for potential sources of heterogeneity and also conducted sensitivity and subgroup analyses by continent and the type of cognitive outcome. The quality of evidence was assessed using the Newcastle-Ottawa Scale (NOS) and the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) framework. RESULTS: We included 20 studies comprising a combined cohort of 1206,782 participants, of which 17 studies were included in the quantitative analysis. The pooled analysis outlined that individuals with MCR exhibited 2.20-fold higher risk of cognitive impairment and dementia, compared to controls (RR=2.20; 95 %CI=1.91-2.53). These findings remained robust across all subgroup analyses, sensitivity analyses and assessments of publication bias. CONCLUSION: MCR may be considered a predictive factor for long-term cognitive impairment and dementia. This should be taken into consideration when clinically evaluating the risk of cognitive impairment and dementia but further research is required to lend greater clarity to this association.

8.
ACS Appl Mater Interfaces ; 16(32): 43049-43063, 2024 Aug 14.
Article de Anglais | MEDLINE | ID: mdl-39088081

RÉSUMÉ

Previously, we reported our new invention of an ultralight (ρ = 1.61 g/cm3) and super high modulus (E = 64.5 GPa) Mg-Li-Al-Zn-Mn-Gd-Y-Sn (LAZWMVT) alloy. Surprisingly, the minor additions of Sn contribute to significant strength and stiffness increases. In this study, we found that Mg2Sn was not only the simple precipitate but also acted as the glue to bind the α-Mg/ß-Li interface in a rather complicated way. To explore its mechanism, we have performed first-principle calculations and HAADF-STEM experiments on the interfacial structures. It was found that the interfacial structural models of α-Mg/ß-Li, α-Mg/Mg2Sn, and ß-Li/Mg2Sn composite interfaces prefer to form α-Mg/Mg2Sn/ß-Li ternary composite structures due to the stable formation enthalpy (ΔH: -1.95 eV/atom). Meanwhile, the interface cleavage energy and critical cleavage stress show that Mg2Sn contribute to the interfacial bond strength better than the ß-Li/α-Mg phase bond strength (σb(ß-Li/Mg2Sn): 0.82 GPa > σb(α-Mg/Mg2Sn): 0.78 GPa > σb(ß-Li/α-Mg): 0.62 GPa). Based on the interfacial electronic structure analysis, α-Mg/Mg2Sn and ß-Li/Mg2Sn were found to have a denser charge distribution and larger charge transfer at the interface, forming stronger chemical bonds. Additionally, according to the crystal orbital Hamiltonian population analysis, the bonding strength of the Mg-Sn atom pair was 2.61 eV, which was higher than the Mg-Li bond strength (0.39 eV). The effect of the Mg2Sn phase on the stability and interfacial bonding strength of the alloying system was dominated by the formation of stronger and more stable Mg-Sn metal covalent bonds, which mainly originated from the contribution of the Mg 3p-Sn 5p orbital bonding states.

9.
Neuron ; 2024 Aug 02.
Article de Anglais | MEDLINE | ID: mdl-39121859

RÉSUMÉ

Primary familial brain calcification (PFBC) is a genetic neurological disease, yet no effective treatment is currently available. Here, we identified five novel intronic variants in SLC20A2 gene from six PFBC families. Three of these variants increased aberrant SLC20A2 pre-mRNA splicing by altering the binding affinity of splicing machineries to newly characterized cryptic exons, ultimately causing premature termination of SLC20A2 translation. Inhibiting the cryptic-exon incorporation with splice-switching ASOs increased the expression levels of functional SLC20A2 in cells carrying SLC20A2 mutations. Moreover, by knocking in a humanized SLC20A2 intron 2 sequence carrying a PFBC-associated intronic variant, the SLC20A2-KI mice exhibited increased inorganic phosphate (Pi) levels in cerebrospinal fluid (CSF) and progressive brain calcification. Intracerebroventricular administration of ASOs to these SLC20A2-KI mice reduced CSF Pi levels and suppressed brain calcification. Together, our findings expand the genetic etiology of PFBC and demonstrate ASO-mediated splice modulation as a potential therapy for PFBC patients with SLC20A2 haploinsufficiency.

10.
Hortic Res ; 11(8): uhae178, 2024 Aug.
Article de Anglais | MEDLINE | ID: mdl-39161738

RÉSUMÉ

Catechins constitute abundant metabolites in tea and have potential health benefits and high economic value. Intensive study has shown that the biosynthesis of tea catechins is regulated by environmental factors and hormonal signals. However, little is known about the coordination of phosphate (Pi) signaling and the jasmonic acid (JA) pathway on biosynthesis of tea catechins. We found that Pi deficiency caused changes in the content of catechins and modulated the expression levels of genes involved in catechin biosynthesis. Herein, we identified two transcription factors of phosphate signaling in tea, named CsPHR1 and CsPHR2, respectively. Both regulated catechin biosynthesis by activating the transcription of CsANR1 and CsMYB5c. We further demonstrated CsSPX1, a Pi pathway repressor, suppressing the activation by CsPHR1/2 of CsANR1 and CsMYB5c. JA, one of the endogenous plant hormones, has been reported to be involved in the regulation of secondary metabolism. Our work demonstrated that the JA signaling repressor CsJAZ3 negatively regulated catechin biosynthesis via physical interaction with CsPHR1 and CsPHR2. Thus, the CsPHRs-CsJAZ3 module bridges the nutrition and hormone signals, contributing to targeted cultivation of high-quality tea cultivars with high fertilizer efficiency.

12.
PeerJ ; 12: e17774, 2024.
Article de Anglais | MEDLINE | ID: mdl-39099649

RÉSUMÉ

The adoption and growth of functional magnetic resonance imaging (fMRI) technology, especially through the use of Pearson's correlation (PC) for constructing brain functional networks (BFN), has significantly advanced brain disease diagnostics by uncovering the brain's operational mechanisms and offering biomarkers for early detection. However, the PC always tends to make for a dense BFN, which violates the biological prior. Therefore, in practice, researchers use hard-threshold to remove weak connection edges or introduce l 1-norm as a regularization term to obtain sparse BFNs. However, these approaches neglect the spatial neighborhood information between regions of interest (ROIs), and ROI with closer distances has higher connectivity prospects than ROI with farther distances due to the principle of simple wiring costs in resent studies. Thus, we propose a neighborhood structure-guided BFN estimation method in this article. In detail, we figure the ROIs' Euclidean distances and sort them. Then, we apply the K-nearest neighbor (KNN) to find out the top K neighbors closest to the current ROIs, where each ROI's K neighbors are independent of each other. We establish the connection relationship between the ROIs and these K neighbors and construct the global topology adjacency matrix according to the binary network. Connect ROI nodes with k nearest neighbors using edges to generate an adjacency graph, forming an adjacency matrix. Based on adjacency matrix, PC calculates the correlation coefficient between ROIs connected by edges, and generates the BFN. With the purpose of evaluating the performance of the introduced method, we utilize the estimated BFN for distinguishing individuals with mild cognitive impairment (MCI) from the healthy ones. Experimental outcomes imply this method attains better classification performance than the baselines. Additionally, we compared it with the most commonly used time series methods in deep learning. Results of the performance of K-nearest neighbor-Pearson's correlation (K-PC) has some advantage over deep learning.


Sujet(s)
Encéphale , Dysfonctionnement cognitif , Imagerie par résonance magnétique , Humains , Dysfonctionnement cognitif/diagnostic , Dysfonctionnement cognitif/imagerie diagnostique , Dysfonctionnement cognitif/physiopathologie , Imagerie par résonance magnétique/méthodes , Encéphale/imagerie diagnostique , Encéphale/physiopathologie , Réseau nerveux/imagerie diagnostique , Réseau nerveux/physiopathologie , Cartographie cérébrale/méthodes , Algorithmes
13.
Gastrointest Endosc ; 2024 Aug 05.
Article de Anglais | MEDLINE | ID: mdl-39111392

RÉSUMÉ

BACKGROUND AND AIMS: Many gastrointestinal (GI) disorders and precancerous conditions often present asymptomatically, leading to delayed patient diagnoses and treatment interventions. This study aimed to develop a novel cable-transmission magnetically controlled capsule endoscopy (CT-MCCE) system for detecting GI diseases and assess its safety and feasibility through clinical trials. METHODS: This prospective, multicenter, trial compared CT-MCCE with conventional gastroscopy in patients aged 18-75 years with upper GI diseases between October 2022 and May 2023. The primary endpoints included the evaluation of sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) in the detection of focal lesions within the esophagus, stomach, and duodenal bulb using CT-MCCE. RESULTS: A total of 180 individuals (mean age: 43.1 years, 52.22% female) were recruited from three hospitals in China. CT-MCCE detected lesions in esophagus with 97.22% sensitivity, 100% specificity, a PPV of 100%, a NPV of 98.18%, and 98.89% accuracy. CT-MCCE detected gastric focal lesions in the whole stomach with 96.81% sensitivity, 98.84% specificity, a PPV of 98.91%, a NPV of 96.59%, and 97.78% accuracy. CT-MCCE detected lesions in the duodenal bulb with 100% sensitivity, 100% specificity, a PPV of 100%, a NPV of 100%, and 100% accuracy. There were no significant differences between CT-MCCE and EGD regarding the cleanliness of the upper GI tract and visibility of the upper GI mucosa. However, CT-MCCE was associated with a lower incidence of discomfort than EGD (P<0.001). CONCLUSIONS: The diagnostic performance of CT-MCCE is comparable to that of EGD in the completion of upper GI tract examinations and lesion detection. Furthermore, the improved tolerance of CT-MCCE in detecting upper GI diseases was noted without any observed adverse events.

14.
Chem Biodivers ; : e202401052, 2024 Jul 26.
Article de Anglais | MEDLINE | ID: mdl-39058413

RÉSUMÉ

A series of diversified glucosamine derivatives (3a-3y) was synthesized and their antifungal activity was examined against four kinds of phytopathogens, Fusarium graminearum (F. graminearum), Fusarium moniliforme (F. moniliforme), Curvularia. lunata (C. lunata), and Rhizoctonia solani (R. solani) which cause seriously economic losses worldwide by affecting crops. The compound 3o showed remarkable antifungal activity against F. graminearum with EC50 value of 3.96 µg/mL, compared to the standard drug triadimefon (10.1 µg/mL). 3D-QSAR model with the statistically recommended values (r2=0.915, q2=0.872) showed that positive charge group or bulky group in the benzyl ring was favorable for the antifungal activity. Enzyme activity assays confirmed that 3o had a moderate inhibition of trehalase with inhibition rate of 51.4 % at 5 µg/mL, which is comparable to those of commercial inhibitor validamycin A with inhibition rate of 83.3 %. Molecular docking analysis revealed that 3o also had a hydrogen bond interaction with key amino acid residue compared to validoxylamine.

15.
Biomol Biomed ; 2024 07 14.
Article de Anglais | MEDLINE | ID: mdl-39036926

RÉSUMÉ

Immune checkpoint inhibitors (ICIs) enhance the tumor-killing ability of T-cells in non-small cell lung cancer (NSCLC), improving overall survival (OS) and revolutionizing treatment for advanced stages. However, challenges remain, such as low response rates and the lack of effective markers for selecting candidates. This study evaluated the impact of hemoglobin, albumin, and platelet (HALP), neutrophil-to-lymphocyte ratio (NLR), and platelet-to-lymphocyte ratio (PLR) on the efficacy of immunotherapy and survival outcomes in advanced NSCLC. Additionally, it aimed to develop a nomogram based on these parameters. Clinical and hematological data from NSCLC patients who received immunotherapy were analyzed. Efficacy was assessed using the immune Response Evaluation Criteria in Solid Tumors (iRECIST), and progression-free survival (PFS) and OS were evaluated. Prediction models incorporated baseline and post-treatment HALP, NLR, and PLR values. The 203 patients had a median follow-up of 16 months, a median PFS (mPFS) of seven months (6.0­8.0), while the median OS (mOS) was not reached (24.0­not available). Pretreatment PLR (PLR0) was associated with a higher disease control rate (DCR) (odds ratio [OR] = 0.258), while initial immunotherapy and NLR after four treatment cycles (NLR4C) significantly improved the objective response rate (ORR). Cox regression analysis showed that pretreatment HALP (HALP0), HALP after four cycles of treatment (HALP4C), and pretreatment NLR (NLR0) significantly impacted PFS. Additionally, HALP0, NLR0, and PLR after four treatment cycles (PLR4C) were associated with OS. The C-indices for PFS and OS were 0.823 and 0.878, respectively, indicating good predictive accuracy. HALP, NLR, and PLR at various time points effectively predicted immunotherapy response in advanced NSCLC patients, with low HALP combined with high NLR and PLR indicating a poor prognosis. These findings could serve as the basis for stratified randomized controlled trials (RCTs) in the future.

16.
Physiol Plant ; 176(4): e14421, 2024.
Article de Anglais | MEDLINE | ID: mdl-38956781

RÉSUMÉ

The seasonal plasticity of resistance to xylem embolism has been demonstrated in leaves of some tree species, but is controversial in stems. In this study, we investigated the seasonality of stem xylem resistance to embolism in six temperate woody species (four deciduous and two evergreen tree species) that were grown at the same site. The xylem conduit anatomy, the concentrations, and ratios of the main cation in the xylem sap, as well as the content of nonstructural carbohydrates (including soluble sugars and starch) were measured in each species under each season to reveal the potential mechanisms of seasonal change in embolism resistance. The stem of all species showed increasing resistance to embolism as seasons progressed, with more vulnerable xylem in spring, but no significant adjustment in the other three seasons. The seasonal plasticity of stem embolism resistance was greater in deciduous species than in evergreen. On a seasonal scale, conduit diameter and conduit implosion resistance, the ratios of K+/Ca2+ and K+/Na+, and starch content were generally not correlated with embolism resistance, suggesting that these are probably not the main drivers of seasonal plasticity of stem embolism resistance. The seasonality of embolism resistance provides critical information for better understanding plant hydraulics in response to seasonal environments, especially under climate change.


Sujet(s)
Tiges de plante , Saisons , Arbres , Tiges de plante/physiologie , Arbres/physiologie , Xylème/physiologie
17.
New Phytol ; 2024 Jul 23.
Article de Anglais | MEDLINE | ID: mdl-39044442

RÉSUMÉ

Plants delicately regulate endogenous auxin levels through the coordination of transport, biosynthesis, and inactivation, which is crucial for growth and development. While it is well-established that the actin cytoskeleton can regulate auxin levels by affecting polar transport, its potential role in auxin biosynthesis has remained largely unexplored. Using LC-MS/MS-based methods combined with fluorescent auxin marker detection, we observed a significant increase in root auxin levels upon deletion of the actin bundling proteins AtFIM4 and AtFIM5. Fluorescent observation, immunoblotting analysis, and biochemical approaches revealed that AtFIM4 and AtFIM5 affect the protein abundance of the key auxin synthesis enzyme YUC8 in roots. AtFIM4 and AtFIM5 regulate the auxin synthesis enzyme YUC8 at the protein level, with its degradation mediated by the 26S proteasome. This regulation modulates auxin synthesis and endogenous auxin levels in roots, consequently impacting root development. Based on these findings, we propose a molecular pathway centered on the 'actin cytoskeleton-26S proteasome-YUC8-auxin' axis that controls auxin levels. Our findings shed light on a new pathway through which plants regulate auxin synthesis. Moreover, this study illuminates a newfound role of the actin cytoskeleton in regulating plant growth and development, particularly through its involvement in maintaining protein homeostasis via the 26S proteasome.

18.
Biosens Bioelectron ; 263: 116580, 2024 Nov 01.
Article de Anglais | MEDLINE | ID: mdl-39033653

RÉSUMÉ

A Mn-based nanozyme, Mn-uNF/Si, with excellent alkali phosphatase-like activity was designed by in-situ growth of ultrathin Mn-MOF on the surface of silicon spheres, and implemented as an effective solid Lewis-Brønsted acid catalyst for broad-spectrum dephosphorylation. H218O-mediated GC-MS studies confirmed the cleavage sites and the involvement of H2O in the new bonds. DRIFT NH3-IR and in-situ ATR-FTIR confirmed the coexistence of Lewis-Brønsted acid sites and the adjustment of adsorption configurations at the interfacial sites. In addition, a green transformation route of "turning waste into treasure" was proposed for the first time ("OPs→PO43-→P food additive") using edible C. reinhardtii as a transfer station. By alkali etching of Mn-uNF/Si, a nanozyme Mn-uNF with laccase-like activity was obtained. Intriguingly, glyphosate exhibits a laccase-like fingerprint-like response (+,-) of Mn-uNF, and a non-enzyme amplified sensor was thus designed, which shows a good linear relationship with Glyp in a wide range of 0.49-750 µM, with a low LOD of 0.61 µM, as well as high selectivity and anti-interference ability under the co-application of phosphate fertilizers and multiple pesticides. This work provides a controllable methodology for the design of bifunctional nanozymes, which sheds light on the highly efficient green transformation of OPs, and paves the way for the selective recognition and quantification of glyphosate. Mechanistically, we also provided deeper insights into the structure-activity relationship at the atomic scale.


Sujet(s)
Techniques de biocapteur , Glycine , , Manganèse , Glycine/analogues et dérivés , Glycine/composition chimique , Manganèse/composition chimique , Techniques de biocapteur/méthodes , Composés organiques du phosphore/composition chimique , Composés organiques du phosphore/analyse , Réseaux organométalliques/composition chimique , Herbicides/composition chimique , Herbicides/analyse , Nanostructures/composition chimique , Technologie de la chimie verte/méthodes , Silicium/composition chimique , Catalyse
19.
Pediatr Neurol ; 158: 71-78, 2024 Sep.
Article de Anglais | MEDLINE | ID: mdl-38981277

RÉSUMÉ

BACKGROUND: Nusinersen is the first drug for precise targeted therapy of spinal muscular atrophy, a rare disease that occurs in one of 10,000 to 20,000 live births. Therefore, thorough and comprehensive reports on the safety of nusinersen in large, real-world populations are necessary. This study aimed to mine the adverse event (AE) signals related to nusinersen through the Food and Drug Administration Adverse Event Reporting System (FAERS) database. METHODS: We extracted reports of AEs with nusinersen as the primary suspect from FAERS between December 2016 and March 2023. Reporting odds ratio (ROR) and Bayesian confidence propagation neural network (BCPNN) were used for AE signal detection. RESULTS: We extracted a total of 4807 suspected AE cases with nusinersen as the primary suspect from the FAERS database. Among them, 106 positive signals were obtained using the ROR and BCPNN. The highest frequency reported systemic organ class was general disorders and administration site conditions. Common clinical AEs of nusinersen were detected in the FAERS database, such as pneumonia, vomiting, back pain, headache, pyrexia, and post-lumbar puncture syndrome. In addition, we identified potential unexpected serious AEs through disproportionality analysis, including sepsis, seizure, epilepsy, brain injury, cardiorespiratory arrest, and cardiac arrest. CONCLUSIONS: Analyzing large amounts of real-world data from the FAERS database, we identified potential new AEs of nusinersen by disproportionate analysis. It is advantageous for health care professionals and pharmacists to concentrate on effectively managing high-risk AEs of nusinersen, improve medication levels in clinical settings, and uphold patient medication safety.


Sujet(s)
Systèmes de signalement des effets indésirables des médicaments , Oligonucléotides , Pharmacovigilance , Food and Drug Administration (USA) , Humains , États-Unis , Systèmes de signalement des effets indésirables des médicaments/statistiques et données numériques , Oligonucléotides/effets indésirables , Bases de données factuelles , Mâle , Femelle , Amyotrophie spinale/traitement médicamenteux , Amyotrophie spinale/induit chimiquement , Enfant
20.
Breast Cancer ; 31(5): 739-753, 2024 Sep.
Article de Anglais | MEDLINE | ID: mdl-39085679

RÉSUMÉ

BACKGROUND: Insufficient data available for older patients with breast cancer complicates decision-making regarding optimal treatment. A systematic review that uses real-world data is required for assessing the effectiveness and potential adverse effects of various therapies for this age group of patients. METHODS: Databases of PubMed, Embase, and Cochrane Library were searched. We included clinical studies that evaluated various treatments for geriatric breast cancer, including adjuvant radiation therapy, hypofractionated radiation therapy (hypo-RT) and accelerated and partial breast irradiation (APBI), endocrine therapy, chemotherapy, and targeted therapy. RESULTS: A total of 71 studies were retrieved. Adjuvant radiation therapy significantly improved overall survival (OS) compared with no radiation [hazard ratio (HR) = 0.60, 95% confidence interval (CI) 0.54-0.67]. The pooled estimates of OS for hypo-RT and APBI demonstrated no inferiority compared with conventional radiation. Both endocrine treatment (HR = 0.63, 95% CI 0.43-0.92) and chemotherapy (HR = 0.76, 95% CI 0.65-0.88) significantly increased OS compared with no treatment. Trastuzumab monotherapy significantly enhanced OS compared with no trastuzumab use (HR = 0.23, 95% CI 0.07-0.73). CONCLUSION: Despite concerns about potential complications during treatment in older patients, proactive therapies significantly increase their survival rates. For patients who are frailer, hypo-RT and APBI offer survival rates comparable to traditional modalities. Additionally, targeted therapy as a monotherapy holds promise as a viable option for patients with HER2-positive breast cancer who cannot undergo chemotherapy. Therefore, by conducting thorough general assessments and clinical evaluations, the side effects of postoperative treatments can be effectively managed.


Sujet(s)
Tumeurs du sein , Humains , Tumeurs du sein/thérapie , Tumeurs du sein/anatomopathologie , Tumeurs du sein/mortalité , Tumeurs du sein/traitement médicamenteux , Femelle , Sujet âgé , Radiothérapie adjuvante/méthodes , Radiothérapie adjuvante/effets indésirables , Traitement médicamenteux adjuvant/méthodes , Traitement médicamenteux adjuvant/effets indésirables , Sujet âgé de 80 ans ou plus , Résultat thérapeutique , Hypofractionnement de dose , Trastuzumab/usage thérapeutique , Trastuzumab/effets indésirables
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