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1.
Environ Sci Technol ; 2024 Oct 08.
Article de Anglais | MEDLINE | ID: mdl-39380208

RÉSUMÉ

Heterogeneous surface processes such as adsorption and oxidation with surface-adsorbed reactive oxygen species (ROSad, e.g., adsorbed oxygen atom (*Oad) and hydroxyl radicals (•OHad)) have been suggested to play an important role in pollutant abatement during heterogeneous catalytic ozonation (HCO). However, to date, there is no reliable method to quantitatively evaluate the contribution of heterogeneous surface processes to pollutant abatement (fS) during HCO. In this study, we developed a method by combining probe compound-based experiments with kinetic modeling to distinguish heterogeneous surface processes from homogeneous bulk reactions with aqueous O3 and ROS (•OH and superoxide radicals (O2•-) in the abatement of various pollutants (e.g., atrazine, ibuprofen, tetrachloroethylene, and perfluorooctanoic acid) during HCO with reduced graphene oxide. The results show that the pollutants that have a low affinity for the rGO surface (e.g., ibuprofen and tetrachloroethylene) were essentially abated by homogeneous bulk reactions, while the contribution of heterogeneous surface processes was negligible (fS < 5%). In contrast, heterogeneous surface processes played an important or even dominant role in the abatement of pollutants that have a high surface affinity (e.g., fS = 32-82% for atrazine and perfluorooctanoic acid). This study is a critical first step in quantitatively evaluating the role of heterogeneous surface processes for pollutant abatement during HCO, which is crucial to understanding the mechanism of HCO and designing catalysts for effective pollutant abatement.

2.
Radiology ; 313(1): e240044, 2024 Oct.
Article de Anglais | MEDLINE | ID: mdl-39377674

RÉSUMÉ

Background The Ovarian-Adnexal Imaging Reporting and Data System (O-RADS) US risk score can be used to accurately stratify ovarian lesions based on morphologic characteristics. However, there are no large multicenter studies assessing the potential impact of using O-RADS US version 2022 risk score in patients referred for surgery for an ovarian or adnexal lesion. Purpose To retrospectively determine the proportion of patients with ovarian or adnexal lesions without acute symptoms who may have been managed conservatively by using the O-RADS US version 2022 risk score. Materials and Methods This multicenter retrospective study included patients with ovarian cystic lesions and nonacute symptoms who underwent surgical resection after US before the introduction of O-RADS US between January 2011 and December 2014. Investigators blinded to the final diagnoses recorded lesion imaging features and O-RADS US risk scores. The frequency of malignancy and the diagnostic performance of the risk score were calculated. The Mann-Whitney test and Fisher exact test were performed, with P < .05 indicating a statistically significant difference. Results A total of 377 patients with surgically resected lesions were included. Among the resected lesions, 42% (157 of 377) were assigned an O-RADS US risk score of 2. Of the O-RADS US 2 lesions, 54% (86 of 157) were nonneoplastic, 45% (70 of 157) were dermoids or other benign tumors, and less than 1% (one of 157) were malignant. Using O-RADS US 4 as the optimal threshold for malignancy prediction yielded a 94% (68 of 72) sensitivity, 64% (195 of 305) specificity, 38% (68 of 178) positive predictive value, and 98% (195 of 199) negative predictive value. Conclusion In patients without acute symptoms who underwent surgery for ovarian and adnexal lesions before the O-RADS US risk score was published, nearly half (42%) of surgically resected lesions retrospectively met the O-RADS US 2 version 2022 criteria. In these patients, imaging follow-up or conservative management could have been offered. © RSNA, 2024 Supplemental material is available for this article. See also the editorial by Fournier in this issue.


Sujet(s)
Tumeurs de l'ovaire , Échographie , Humains , Femelle , Études rétrospectives , Adulte d'âge moyen , Adulte , Sujet âgé , Tumeurs de l'ovaire/imagerie diagnostique , Tumeurs de l'ovaire/chirurgie , Tumeurs de l'ovaire/anatomopathologie , Échographie/méthodes , Adolescent , Maladies des annexes de l'utérus/imagerie diagnostique , Maladies des annexes de l'utérus/chirurgie , Jeune adulte , Sujet âgé de 80 ans ou plus , Ovaire/imagerie diagnostique , Ovaire/chirurgie , Appréciation des risques
3.
BMC Cancer ; 24(1): 1248, 2024 Oct 09.
Article de Anglais | MEDLINE | ID: mdl-39385125

RÉSUMÉ

BACKGROUND: Locally advanced rectal cancer (LARC) poses unique challenges in treatment, with current neoadjuvant chemoradiotherapy (NA-CRT) showing limitations. The CapeOX regimen emerges as a potential less aggressive neoadjuvant chemotherapy (NAC) for LARC. METHODS: We conducted a retrospective study involving treatment-naïve patients with LARC from March 2014 to March 2021 who received 2-4 cycles of CapeOX NAC followed by radical surgery. Treatment response was evaluated using tumor regression grade (TRG), MRI-based TRG (MRI-TRG), and Neoadjuvant Rectal (NAR) score. RESULTS: 94.7% of patients experienced symptom improvement and 96.4% achieved sphincter-preserving surgery. Post-NAC showed significant tumor regression and MRI confirmed a tumor length reduction (P < 0.001). Clinical and pathological staging discrepancies post-NAC suggest broader therapeutic advantages. 5-year overall and disease-free survival rates were 78.4% and 73.4%. NAR scores provided better prognostic accuracy than MRI-TRG. CONCLUSION: CapeOX NAC presents notable benefits for LARC patients and its clinical significance may be underestimated. The NAR score demonstrates superior prognostic value over MRI-TRG.


Sujet(s)
Protocoles de polychimiothérapie antinéoplasique , Traitement néoadjuvant , Tumeurs du rectum , Humains , Tumeurs du rectum/thérapie , Tumeurs du rectum/anatomopathologie , Tumeurs du rectum/traitement médicamenteux , Tumeurs du rectum/imagerie diagnostique , Tumeurs du rectum/mortalité , Traitement néoadjuvant/méthodes , Mâle , Femelle , Adulte d'âge moyen , Études rétrospectives , Sujet âgé , Protocoles de polychimiothérapie antinéoplasique/usage thérapeutique , Capécitabine/administration et posologie , Capécitabine/usage thérapeutique , Adulte , Imagerie par résonance magnétique , Résultat thérapeutique , Stadification tumorale , Oxaliplatine/usage thérapeutique , Oxaliplatine/administration et posologie , Pronostic
4.
Plant Physiol ; 2024 Sep 29.
Article de Anglais | MEDLINE | ID: mdl-39343733

RÉSUMÉ

Aluminum (Al) stress, a prevalent constraint in acidic soils, inhibits plant growth by inhibiting root elongation through restricted cell expansion. The molecular mechanisms of Al-induced root inhibition, however, are not fully understood. This study aimed to elucidate the role of Small Auxin-up RNAs (SlSAURs), which function downstream of the key Al stress-responsive transcription factor SENSITIVE TO PROTON RHIZOTOXICITY 1 (SlSTOP1) and its enhancer STOP1-INTERACTING ZINC-FINGER PROTEIN 1 (SlSZP1), in modulating root elongation under Al stress in tomato (Solanum lycopersicum). Our findings demonstrated that tomato lines with knocked out SlSAURs exhibited shorter root lengths when subjected to Al stress. Further investigation into the underlying mechanisms revealed that SlSAURs interact with Type 2C Protein Phosphatases (SlPP2Cs), specifically D-clade Type 2C Protein Phosphatases (SlPP2C.Ds). This interaction was pivotal as it suppresses the phosphatase activity, leading to the degradation of SlPP2C.D's inhibitory effect on plasma membrane H+-ATPase. Consequently, this promoted cell expansion and root elongation under Al stress. These findings increase our understanding of the molecular mechanisms by which Al ions modulate root elongation. The discovery of the SlSAUR-SlPP2C.D interaction and its impact on H+-ATPase activity also provides a perspective on the adaptive strategies employed by plants to cope with Al toxicity, which may lead to the development of tomato cultivars with enhanced Al stress tolerance, thereby improving crop productivity in acidic soils.

5.
Br J Hosp Med (Lond) ; 85(9): 1-15, 2024 Sep 30.
Article de Anglais | MEDLINE | ID: mdl-39347671

RÉSUMÉ

Aims/Background Liver abscess (LA) is a serious medical condition that predisposes patients to sepsis. However, predicting sepsis in LA patients has rarely been explored. This study employed univariate and multivariate logistic regression analyses to identify independent risk factors for sepsis, which would provide guidance for clinical diagnosis and treatment. Methods A total of 122 patients with LA treated in Peking University People's Hospital from 1 January 2016 to 31 October 2022 were recruited. Among the cases, 35 patients had sepsis (sepsis group) while the remaining 87 did not have sepsis (non-sepsis group). Clinical data were collected for all enrolled cases. Univariate analysis was performed to identify potential predictors, which were tested in multivariable logistic analysis to pinpoint the independent risk factors for sepsis in LA patients; these findings were utilized to develop a prediction model. Receiver operating characteristic (ROC) curve was used to evaluate the diagnostic efficacy of the prediction model. Informed consent to participate was obtained from the patients or their relatives. Results The incidence of shivering in the sepsis group was significantly higher than that in the non-sepsis group (p < 0.05). Through the univariate analysis, it was found that the reduction in platelet count and prothrombin time activity and the elevation of glycosylated hemoglobin (HbAlc) and procalcitonin (PCT) were more significant in the sepsis group than in the non-sepsis group (p < 0.05). Multivariate logistic regression analysis revealed that PCT and HbAlc were independent risk predictors of sepsis in LA patients within the derivation cohort (p < 0.05). Conclusion Elevated levels of HbAlc and PCT were independent risk factors for sepsis associated with LA. Patients with LA exhibiting elevated PCT levels demonstrated a 21% increased susceptibility to sepsis, and those with elevated HbAlc levels showed a 38% heightened risk for sepsis.


Sujet(s)
Abcès du foie , Sepsie , Humains , Mâle , Femelle , Sepsie/complications , Facteurs de risque , Adulte d'âge moyen , Abcès du foie/épidémiologie , Procalcitonine/sang , Sujet âgé , Adulte , Courbe ROC , Modèles logistiques , Chine/épidémiologie , Numération des plaquettes
6.
BMC Med Educ ; 24(1): 1052, 2024 Sep 27.
Article de Anglais | MEDLINE | ID: mdl-39334142

RÉSUMÉ

BACKGROUND: How to mobilize nurses students' learning initiative, reduce the incidence of academic procrastination, and improve their social adaptability is a key factor in lowering nursing brain drain and improving nursing quality. OBJECTIVE: To explore the mediating role of resilience in the correlation between social adaptability and academic procrastination of undergraduate nursing students. METHODS: This study is a cross-sectional survey. The researchers conducted an electronic questionnaire survey of 962 nursing undergraduates in Guanzhong District, Shaanxi Province from November 2022 to April 2023, and adopted the intention sampling method. And make the following assumptions: (1) There is a significant negative correlation between academic procrastination and social adaptability. (2) Academic procrastination can directly affect the social adaptability of undergraduate nursing students, and it has a significant negative predictive effect. (3) Resilience can directly affect academic procrastination and social adaptability. At the same time, resilience plays an intermediary role between the two. In this study, the Aitken procrastination scale, the resilience scale, and the social adaptability diagnostic scale were used to evaluate undergraduate nursing students. SPSS27.0 software is used to analyze the data statistically, and the Hayes PROCESS Macro method is used to test the model. RESULTS: The study's findings are as follows: 1) Academic procrastination significantly and negatively impacts social adaptability (c = -0.292, t = -6.407, p < 0.001). 2) Even when accounting for resilience, academic procrastination still significantly predicts lower social adaptability (c'= -0.204, t = -4.338, p < 0.001). 3) The Bootstrap method test of percentile bias correction indicates that resilience serves as a significant mediator between academic procrastination and social adaptability. Bootstrap SE = 0.018, 95% CI = (-0.124, -0.055). The indirect effect contributes to 29.79% of the total effect. CONCLUSION: Resilience not only directly affects the academic procrastination and social adaptability of nursing students, but also partially intermediate the relationship between academic procrastination and social adaptability.


Sujet(s)
Procrastination , Résilience psychologique , Élève infirmier , Humains , Élève infirmier/psychologie , Études transversales , Femelle , Mâle , Jeune adulte , Adaptation psychologique , Formation au diplôme infirmier (USA) , Enquêtes et questionnaires , Chine , Adulte
7.
Zhongguo Zhen Jiu ; 44(9): 1023-8, 2024 Sep 12.
Article de Chinois | MEDLINE | ID: mdl-39318293

RÉSUMÉ

OBJECTIVE: To understand the cognition for insomnia and preference for acupuncture in breast cancer survivors based on the in-depth interview. METHODS: Thirty breast cancer survivors with insomnia symptoms were collected for in-depth interview. The interview questions included three aspects, i.e. sleep expectation, cognition for insomnia (discomfort caused by insomnia, and underlying inducing factors of insomnia) and the preference for acupuncture (treatment methods used in the past, the reasons for not choosing acupuncture, and the tendency of acupuncture treatment). Using Colaizzi content analysis method, the data was analyzed. RESULTS: Regarding sleep expectation, most breast cancer survivors with insomnia symptoms were able to maintain normal activity in daytime. Insomnia symptoms often led to fatigue, and the inducing factors of insomnia referred to the treatment with endocrine therapy, anticipatory anxiety and inadequate sleep hygiene. All of the patients had received pharmacotherapy. The use proportion of non-pharmacological therapies was relatively low, and acupuncture was not chosen due to "not familiar with" and "fear of pain". Concerning to the preference for acupuncture, patients preferred the therapeutic methods of acupuncture with mild pain sensation and gentle stimulation; and the treatment should be more acceptable if delivered 2 or 3 times a week. CONCLUSION: Breast cancer survivors have the expectations for sleep, and are willing to receive the treatment with medication for their sleep disorders. Because of lack of the knowledge for acupuncture effect on insomnia and fear of strong needling sensation, a part of patients are unwilling to be treated with acupuncture therapy, but they are expected to receive the treatment with acupuncture while feeling more comfortable.


Sujet(s)
Thérapie par acupuncture , Tumeurs du sein , Survivants du cancer , Cognition , Troubles de l'endormissement et du maintien du sommeil , Humains , Troubles de l'endormissement et du maintien du sommeil/thérapie , Troubles de l'endormissement et du maintien du sommeil/étiologie , Troubles de l'endormissement et du maintien du sommeil/psychologie , Femelle , Tumeurs du sein/thérapie , Tumeurs du sein/complications , Tumeurs du sein/psychologie , Adulte d'âge moyen , Adulte , Survivants du cancer/psychologie , Sujet âgé , Sommeil , Préférence des patients
8.
J Orthop Translat ; 48: 163-175, 2024 Sep.
Article de Anglais | MEDLINE | ID: mdl-39257437

RÉSUMÉ

Background: In the recent decade, there has been substantial progress in the technologies and philosophies associated with diagnosing and treating anterior cruciate ligament (ACL) injuries in China. The therapeutic efficacy of ACL reconstruction in re-establishing the stability of the knee joint has garnered widespread acknowledgment. However, the path toward standardizing diagnostic and treatment protocols remains to be further developed and refined. Objective: In this context, the Chinese Association of Orthopaedic Surgeons (CAOS) and the Chinese Society of Sports Medicine (CSSM) collaboratively developed an expert consensus on diagnosing and treating ACL injury, aiming to enhance medical quality through refining professional standards. Methods: The consensus drafting team invited experts across the Greater China region, including the mainland, Hong Kong, Macau, and Taiwan, to formulate and review the consensus using a modified Delphi method as a standardization approach. As members of the CSSM Lower Limb Study Group and the CAOS Arthroscopy and Sports Medicine Study Group, invited experts concentrated on two pivotal issues: "Graft Selection" and "Clinical Outcome Evaluation" during the second part of the consensus development. Results: This focused discussion ultimately led to a strong consensus on nine specific consensus terms. Conclusion: The consensus clearly states that ACL reconstruction has no definitive "gold standard" graft choice. Autografts have advantages in healing capability but are limited in availability and have potential donor site morbidities; allografts reduce surgical trauma but incur additional costs, and there are concerns about slow healing, quality control issues, and a higher failure rate in young athletes; synthetic ligaments allow for early rehabilitation and fast return to sport, but the surgery is technically demanding and incurs additional costs. When choosing a graft, one should comprehensively consider the graft's characteristics, the doctor's technical ability, and the patient's needs. When evaluating clinical outcomes, it is essential to ensure an adequate sample size and follow-up rate, and the research should include patient subjective scoring, joint function and stability, complications, surgical failure, and the return to sport results. Medium and long-term follow-ups should not overlook the assessment of knee osteoarthritis.

9.
Natl Sci Rev ; 11(10): nwae232, 2024 Oct.
Article de Anglais | MEDLINE | ID: mdl-39301076

RÉSUMÉ

This review systematically explores the inherent structural advantages of fiber over conventional film or bulk forms for artificial muscles, emphasizing their enhanced mechanical properties and actuation, scalability, and design flexibility. Distinctive merits of electrically powered artificial muscle fiber actuation mechanisms, including electrothermal, electrochemical and dielectric actuation, are highlighted, particularly for their operational efficiency, precise control capabilities, miniaturizability and seamless integration with electronic components. A comprehensive overview of significant research driving performance enhancements in artificial muscle fibers through materials and structural innovations is provided, alongside a discussion of the diverse design methodologies that have emerged in this field. A detailed comparative assessment evaluates the performance metrics, advantages and manufacturing complexities of each actuation mechanism, underscoring their suitability for various applications. Concluding with a strategic outlook, the review identifies key challenges and proposes targeted research directions to advance and refine artificial muscle fiber technologies.

10.
Drug Discov Today ; 29(11): 104161, 2024 Sep 07.
Article de Anglais | MEDLINE | ID: mdl-39245345

RÉSUMÉ

Drug resistance has compromised the efficacy of chemotherapy. The dysregulation of drug transporters including P-glycoprotein (P-gp) can mediate drug resistance through drug efflux. In this review, we highlight the role of P-gp in cancer drug resistance and the related molecular pathways, including phosphoinositide 3-kinase (PI3K)-Akt, phosphatase and tensin homolog (PTEN) and nuclear factor-κB (NF-κB), along with non-coding RNAs (ncRNAs). Extracellular vesicles secreted by the cells can transport ncRNAs and other proteins to change P-gp activity in cancer drug resistance. P-gp requires ATP to function, and the induction of mitochondrial dysfunction or inhibition of glutamine metabolism can impair P-gp function, thus increasing chemosensitivity. Phytochemicals, small molecules and nanoparticles have been introduced as P-gp inhibitors to increase drug sensitivity in human cancers.

11.
J Colloid Interface Sci ; 678(Pt B): 487-496, 2024 Sep 05.
Article de Anglais | MEDLINE | ID: mdl-39260297

RÉSUMÉ

Water is considered an effective microwave absorber due to its high transmittance and frequency-dispersive dielectric constant, yet it is challenging to form it into a stable state as an absorber. Herein, we developed a water-containing microwave absorber using chemical vapor deposition (CVD), namely, the bifunctional carbon/NaCl multi-interfaces hybrid with excellent water harvesting and microwave absorption performance. Carbon/NaCl exhibits remarkable water harvesting abilities from air, exceeding 210 % of its weight in 12 h. The development of the hydrophilic/hydrophobic heterojunction interface is responsible for this outstanding performance. Additionally, the interfacial polarization provided by carbon/NaCl, along with the dipole polarization induced by the internally captured water and defects, enhances its microwave absorption. The carbon/NaCl hybrid achieved a minimum reflection loss (RLmin) of -69.62 dB at 17.1 GHz with a thickness of 2.13 mm, and a maximum effective absorption bandwidth (EABmax) of 6.74 GHz at a thickness of 2.5 mm. Compared with raw NaCl (RLmin of -24.5 dB, EABmax of 3.88 GHz), the RLmin and EABmax values of the absorber increased by approximately 2.85 and 1.74 times. These results highlight the potential for bifunctional carbon/NaCl hybrid in applications within extreme environments, presenting a promising avenue for further research and development.

12.
J Org Chem ; 89(19): 14315-14327, 2024 Oct 04.
Article de Anglais | MEDLINE | ID: mdl-39268645

RÉSUMÉ

In this study, we have successfully developed a glycosylation method using 1-O-(methylthio)thiocarbonyl-glycoses as donors. Such xanthate donors are easily accessible and shelf-stable. The glycosylation reaction could be promoted by cations (acidic to neutral conditions) under mild conditions, exhibiting a reactivity intermediate between that with glycosyl trichloroacetimidate as the donor and that with thioglycoside as the donor. This methodology tolerates both "armed" and "disarmed" glycosyl donors, as well as various sugar acceptors, and affords the corresponding glycosides in good to excellent yields. Based on the relative higher reactivity of such xanthate donors than thioglycoside donors under the same glycosylation conditions, a trisaccharide was further synthesized in a one-pot glycosylation strategy.

13.
Nature ; 633(8029): 371-379, 2024 Sep.
Article de Anglais | MEDLINE | ID: mdl-39232160

RÉSUMÉ

The past two decades has witnessed a remarkable increase in the number of microbial genomes retrieved from marine systems1,2. However, it has remained challenging to translate this marine genomic diversity into biotechnological and biomedical applications3,4. Here we recovered 43,191 bacterial and archaeal genomes from publicly available marine metagenomes, encompassing a wide range of diversity with 138 distinct phyla, redefining the upper limit of marine bacterial genome size and revealing complex trade-offs between the occurrence of CRISPR-Cas systems and antibiotic resistance genes. In silico bioprospecting of these marine genomes led to the discovery of a novel CRISPR-Cas9 system, ten antimicrobial peptides, and three enzymes that degrade polyethylene terephthalate. In vitro experiments confirmed their effectiveness and efficacy. This work provides evidence that global-scale sequencing initiatives advance our understanding of how microbial diversity has evolved in the oceans and is maintained, and demonstrates how such initiatives can be sustainably exploited to advance biotechnology and biomedicine.


Sujet(s)
Organismes aquatiques , Biodiversité , Bioprospection , Cartographie géographique , Métagénome , Peptides antimicrobiens cationiques/génétique , Peptides antimicrobiens cationiques/isolement et purification , Organismes aquatiques/classification , Organismes aquatiques/génétique , Organismes aquatiques/isolement et purification , Archéobactéries/génétique , Archéobactéries/classification , Bactéries/génétique , Bactéries/classification , Technologie biomédicale , Bioprospection/tendances , Biotechnologie , Protéine-9 associée à CRISPR/génétique , Protéine-9 associée à CRISPR/isolement et purification , Systèmes CRISPR-Cas/génétique , Résistance bactérienne aux médicaments/génétique , Génome d'archéobactérie/génétique , Génome bactérien/génétique , Métagénome/génétique , Océans et mers , Phylogenèse , Eau de mer/microbiologie , Microbiologie de l'eau
14.
Nat Commun ; 15(1): 8425, 2024 Sep 28.
Article de Anglais | MEDLINE | ID: mdl-39341821

RÉSUMÉ

In the healing process of myocardial infarction, cardiac fibroblasts are activated to produce collagen, leading to adverse remodeling and heart failure. Our previous study showed that ASPP1 promotes cardiomyocyte apoptosis by enhancing the nuclear trafficking of p53. We thus explored the influence of ASPP1 on myocardial fibrosis and the underlying mechanisms. Here, we observed that ASPP1 was increased after 4 weeks of MI. Both global and myofibroblast knockout of ASPP1 in mice mitigated cardiac dysfunction and fibrosis after MI. Strikingly, ASPP1 produced the opposite influence on p53 level and cell fate in cardiac fibroblasts and cardiomyocytes. Knockdown of ASPP1 increased p53 levels and inhibited the activity of cardiac fibroblasts. ASPP1 accumulated in the cytoplasm of fibroblasts while the level of p53 was reduced following TGF-ß1 stimulation; however, inhibition of ASPP1 increased the p53 level and promoted p53 nuclear translocation. Mechanistically, ASPP1 is directly bound to deubiquitinase OTUB1, thereby promoting the ubiquitination and degradation of p53, attenuating myofibroblast activity and cardiac fibrosis, and improving heart function after MI.


Sujet(s)
Fibrose , Infarctus du myocarde , Myocarde , Myofibroblastes , Protéine p53 suppresseur de tumeur , Animaux , Humains , Mâle , Souris , Apoptose/génétique , Protéines régulatrices de l'apoptose/métabolisme , Protéines régulatrices de l'apoptose/génétique , Délétion de gène , Souris de lignée C57BL , Souris knockout , Infarctus du myocarde/métabolisme , Infarctus du myocarde/anatomopathologie , Infarctus du myocarde/génétique , Myocarde/métabolisme , Myocarde/anatomopathologie , Myocytes cardiaques/métabolisme , Myocytes cardiaques/anatomopathologie , Myofibroblastes/métabolisme , Myofibroblastes/anatomopathologie , Protéolyse , Facteur de croissance transformant bêta-1/métabolisme , Protéine p53 suppresseur de tumeur/métabolisme , Protéine p53 suppresseur de tumeur/génétique , Ubiquitination
15.
Exp Eye Res ; 247: 110057, 2024 Oct.
Article de Anglais | MEDLINE | ID: mdl-39179168

RÉSUMÉ

Vascular endothelial growth factor (VEGF) signaling is crucial for choroidal neovascularization (CNV), a major pathological feature of neovascular age-related macular degeneration (nAMD). Gene transcription of VEGF is mainly regulated by hypoxia-inducible factor 1-alpha (HIF-1α). The chromobox (CBX) family polycomb protein (Pc) subgroup includes CBX2, CBX4, CBX6, CBX7, and CBX8. CBX4 enhances hypoxia-induced VEGF expression and angiogenesis in hepatocellular carcinoma (HCC) cells by increasing HIF-1α's transcriptional activity. The objective of the study was to examine the functions of members of the CBX family Pc subgroup in choroidal vascular endothelial cells (CVECs) during CNV. CBX4 and CBX7 expression was up-regulated in hypoxic human choroidal vascular endothelial cells (HCVECs). In HCVECs, CBX7 facilitated HIF-1α transcription and expression, while CBX4 did not. In HCVECs, CBX7 stimulated HIF-1α's nuclear translocation and transcriptional activity, which in turn stimulated VEGF transcription and expression. The CBX7/HIF-1α/VEGF pathway promoted the migration, proliferation, and tube formation of HCVECs. The CBX7/HIF-1α/VEGF pathway was up-regulated in CVECs and in the mouse model with laser-induced CNV. Mouse CNV was lessened by the blockade of CBX7 through the down-regulation of HIF-1α/VEGF. In conclusion, CBX7 enhanced pro-angiogenic behaviors of hypoxic CVECs by up-regulating the HIF-1α/VEGF pathway, which contributing to the formation of mouse laser-induced CNV.


Sujet(s)
Choroïde , Néovascularisation choroïdienne , Modèles animaux de maladie humaine , Sous-unité alpha du facteur-1 induit par l'hypoxie , Souris de lignée C57BL , Complexe répresseur Polycomb-1 , Facteur de croissance endothéliale vasculaire de type A , Néovascularisation choroïdienne/métabolisme , Néovascularisation choroïdienne/anatomopathologie , Néovascularisation choroïdienne/génétique , Animaux , Sous-unité alpha du facteur-1 induit par l'hypoxie/métabolisme , Sous-unité alpha du facteur-1 induit par l'hypoxie/génétique , Souris , Complexe répresseur Polycomb-1/métabolisme , Complexe répresseur Polycomb-1/génétique , Facteur de croissance endothéliale vasculaire de type A/métabolisme , Facteur de croissance endothéliale vasculaire de type A/génétique , Humains , Choroïde/vascularisation , Choroïde/métabolisme , Transduction du signal/physiologie , Cellules cultivées , Technique de Western , Prolifération cellulaire/physiologie , Cellules endothéliales/métabolisme , Régulation de l'expression des gènes , Endothélium vasculaire/métabolisme , Endothélium vasculaire/anatomopathologie , Mouvement cellulaire , Réaction de polymérisation en chaine en temps réel
16.
Cochrane Database Syst Rev ; 8: CD016013, 2024 08 23.
Article de Anglais | MEDLINE | ID: mdl-39177079

RÉSUMÉ

BACKGROUND: Tuberculosis (TB) is amongst the leading causes of death from an infectious disease, with an estimated 1.3 million deaths from TB in 2022. Approximately 25% of the global population is estimated to be infected with the TB bacterium, giving rise to 10.6 million episodes of TB disease in 2022. The prevalence of diabetes influences TB incidence and TB mortality. It is associated not only with an increased risk of TB disease but also death during TB treatment, TB relapse after treatment completion and multidrug-resistant TB. Since 2011, the World Health Organization (WHO) has recommended collaborative TB and diabetes activities as outlined in the Collaborative Framework for Care and Control of TB and Diabetes. OBJECTIVES: To determine the prognostic value of diabetes mellitus (DM) in the general population of adults, adolescents and children for predicting tuberculosis disease. SEARCH METHODS: We searched the literature databases MEDLINE (via PubMed) and WHO Global Index Medicus, and the WHO International Clinical Trials Registry Platform (ICTRP) on 3 May 2023 (date of last search for all databases); we placed no restrictions on the language of publication. SELECTION CRITERIA: We included retrospective and prospective cohort studies, irrespective of publication status or language. The target population comprised adults, adolescents and children from diverse settings, encompassing outpatient and inpatient cohorts, with varying comorbidities and risk of exposure to tuberculosis. DATA COLLECTION AND ANALYSIS: We used standard Cochrane methodology and the Quality In Prognosis Studies (QUIPS) tool. Prognostic factors assessed at enrolment/baseline included diabetes, as defined by the individual studies, encompassing patient-reported status, abstracted from medical records or claims data, or diagnosed by plasma glucose/glycosylated haemoglobin. The primary outcome was the incidence of tuberculosis disease. The secondary outcome was recurrent TB disease. We performed a random-effects meta-analysis for the adjusted hazard ratios, risk ratios, or odds ratios, employing the restricted maximum likelihood estimation. We rated the certainty of the evidence using the GRADE approach. MAIN RESULTS: We included 48 cohort studies with over 61 million participants from the six WHO regions. However, the representation was variable as eight population-based studies were from South Korea and 19 from China, with overlapping study periods, and only one from the African region (Ethiopia). All studies included adults, and nine studies also included children and adolescents. Most studies diagnosed DM based on clinical records, including fasting blood glucose levels or glucose-lowering treatments. The studies did not distinguish between type 1 and type 2 DM; only one study focused on type 1 DM. Diagnosis and exclusion of TB were performed using culture or molecular WHO-recommended rapid diagnostic tests (mWRD) in only 12 studies, which could have biassed the effect estimate. The median follow-up time was five years (interquartile range 1.5 to 10, range 1 to 16.9), and the studies primarily reported an adjusted hazard ratio from a multivariable Cox-proportional hazard model. Hazard Ratios (HR) The HR estimates represent the highest certainty of the evidence, explored through sensitivity analyses and excluding studies at high risk of bias. We present 95% confidence intervals (CI) and prediction intervals, which show between-study heterogeneity represented in measuring the variability of effect sizes (i.e. the interval within which the effect size of a new study would fall considering the same population of studies included in the meta-analysis). DM may increase the risk of tuberculosis disease (HR 1.90, 95% CI 1.51 to 2.40; prediction interval 0.83 to 4.39; 10 studies; 11,713,023 participants). The certainty of the evidence is low, due to a moderate risk of bias across studies and inconsistency. Considering a risk without diabetes of 129 cases per 100,000 population, this represents 102 more (59 to 153 more) cases per 100,000. When stratified by follow-up time, the results are more consistent across < 10 years follow-up (HR 1.52, 95% CI 1.47 to 1.57; prediction interval 1.45 to 1.59; 7 studies; 10,380,872 participants). This results in a moderate certainty of the evidence due to a moderate risk of bias across studies. However, at 10 or more years of follow-up, the estimates yield a wider CI and a higher HR (HR 2.44, 95% CI 1.22 to 4.88; prediction interval 0.09 to 69.12; 3 studies; 1,332,151 participants). The certainty of the evidence is low due to the moderate risk of bias and inconsistency. Odds Ratio (OR) DM may increase the odds of tuberculosis disease (OR 1.61, 95% CI 1.27 to 2.04; prediction interval 0.96 to 2.70; 4 studies; 167,564 participants). Stratification by follow-up time was not possible as all studies had a follow-up < 10 years. The certainty of the evidence is low due to a moderate risk of bias and inconsistency. Risk Ratio (RR) The RR estimates represent the highest certainty of the evidence, explored through sensitivity analyses and excluding studies at high risk of bias. DM probably increases the risk of tuberculosis disease (RR 1.60, 95% CI 1.42 to 1.80; prediction interval 1.38 to 1.85; 6 studies; 44,058,675 participants). Stratification by follow-up time was not possible as all studies had a follow-up < 10 years. The certainty of the evidence is moderate due to a moderate risk of bias. AUTHORS' CONCLUSIONS: Diabetes probably increases the risk of developing TB disease in the short term (< 10 years) and may also increase the risk in the long term (≥ 10 years). As glycaemic control and access to care may be potential effect modifiers of the association between diabetes and the risk of TB disease, the overall estimates should be interpreted with caution when applied locally. Policies targeted at reducing the burden of diabetes are needed to contribute to the aims of ending TB. Large population-based cohorts, including those derived from high-quality national registries of exposures (diabetes) and outcomes (TB disease), are needed to provide estimates with a high certainty of evidence of this risk across different settings and populations, including low- and middle-income countries from different WHO regions. Moreover, studies including children and adolescents and currently recommended methods for diagnosing TB would provide more up-to-date information relevant to practice and policy. FUNDING: World Health Organization (203256442) REGISTRATION: PROSPERO registration: CRD42023408807.


Sujet(s)
Diabète , Tuberculose , Adolescent , Adulte , Enfant , Humains , Diabète/épidémiologie , Incidence , Pronostic , Facteurs de risque , Tuberculose/épidémiologie
17.
Article de Anglais | MEDLINE | ID: mdl-39186888

RÉSUMÉ

This study introduces an efficient on-column refolding and purification method for preparing nanobodies (Nbs) expressed as inclusion bodies and fusion proteins. The HisTrapTM FF system was successfully employed for the purification of the fusion protein FN1-ΔI-CM-2D5. The intein ΔI-CM cleavage activity was activated at 42 °C, followed by incubation for 4 h. Leveraging the remarkable thermal stability of Nbs, 2D5 was further purified through heat treatment at 80 °C for 1h. This method yielded up to 107.2 mg of pure 2D5 with a purity of 99.2 % from just 1L of bacterial culture grown in a shaker flask. Furthermore, this approach successfully restored native secondary structure and affinity of 2D5. Additionally, the platform was effectively applied to the refolding and purification of a polystyrene-binding nanobody (B2), which exhibited limited expression in the periplasmic and cytoplasmic spaces of E. coli. This endeavor resulted in the isolation of 53.2 mg of pure B2 Nb with a purity exceeding 99.5 % from the same volume of bacterial culture. Significantly, this approach restored the native secondary structure of the Nbs, highlighting its potential for addressing challenges associated with expressing complex Nbs in E. coli. Overall, this innovative platform provides a scientifically rigorous and reproducible method for the efficient preparation of Nbs, offering a valuable tool for antibody research and development.


Sujet(s)
Escherichia coli , Corps d'inclusion , Repliement des protéines , Protéines de fusion recombinantes , Anticorps à domaine unique , Corps d'inclusion/composition chimique , Corps d'inclusion/métabolisme , Anticorps à domaine unique/composition chimique , Anticorps à domaine unique/isolement et purification , Anticorps à domaine unique/génétique , Protéines de fusion recombinantes/composition chimique , Protéines de fusion recombinantes/isolement et purification , Protéines de fusion recombinantes/génétique , Protéines de fusion recombinantes/métabolisme , Escherichia coli/génétique , Escherichia coli/métabolisme
18.
Macromol Rapid Commun ; 45(18): e2400206, 2024 Sep.
Article de Anglais | MEDLINE | ID: mdl-39101672

RÉSUMÉ

In recent years, the fully oxygen-tolerant reversible deactivation radical polymerization (RDRP) has become a highly researched area. In this contribution, a new and minimalist method is successfully employed to accomplish fully oxygen-tolerant reversible addition-fragmentation chain transfer (RAFT) polymerization using bis(trithiocarbonate) disulfides (BisTTC) as an iniferter agent, where the released sulfur-centered trithiocarbonate (TTC) radical can initiate monomer. Furthermore, polymerization kinetics revealed the typical "living" features of this polymerization system. More importantly, by high-throughput screening, it is found that dodecyl-substituted TTC is responsible for the fully oxygen-tolerant RAFT polymerization though trithiocarbonate radical initiation and R radical deoxygenation. It is believed that trithiocarbonate radical initiation strategy provides a powerful and minimalist tool for fully oxygen-tolerant RDRPs.


Sujet(s)
Oxygène , Polymérisation , Oxygène/composition chimique , Radicaux libres/composition chimique , Soufre/composition chimique , Cinétique , Structure moléculaire , Polymères/composition chimique , Disulfures/composition chimique , Thiones
19.
Thorac Cancer ; 15(27): 1946-1957, 2024 Sep.
Article de Anglais | MEDLINE | ID: mdl-39138880

RÉSUMÉ

BACKGROUND: Circular RNAs (circRNAs), produced by reverse splicing, act as important players in human cancers. We aimed to assess the biological functions of circRNA pituitary homeobox 1 (circ-PITX1) in non-small-cell lung cancer (NSCLC). METHODS: qRT-PCR was employed to determine RNA expression. Biological behaviors of NSCLC cells were assessed by CCK-8, colony formation, EdU assay, flow cytometry, wound healing, and transwell assays. Glutamine catabolism was examined via the measurement of glutamine consumption, α-ketoglutarate levels, as well as ATP levels. Protein levels were detected by western blot assays. Dual-luciferase reporter assay and RNA immunoprecipitation (RIP) assay were performed to reveal the mechanism responsible for circ-PITX1 regulating NSCLC cell malignancy. The murine xenograft model was established to investigate circ-PITX1's effect on tumor formation. RESULTS: Circ-PITX1 was overexpressed in NSCLC tissue samples and cells. Its low expression repressed NSCLC cell proliferation and motility. Moreover, our data revealed its downregulation inhibited glutamine catabolism and tumor formation and promoted cell apoptosis. In addition, circ-PITX1 bound to miR-615-5p, and its inhibitory effect on tumor cellular behaviors could be reversed after decreasing miR-615-5p expression. The miRNA targeted E26 transformation specific-1 (ETS1), whose upregulation abolished miR-615-5p overexpression-induced effects in NSCLC cells. Furthermore, circ-PITX1 positively modulated ETS1 production through interaction with miR-615-5p. CONCLUSION: Circ-PITX1 facilitated NSCLC progression via modulating miR-615-5p/ETS1 pathway.


Sujet(s)
Carcinome pulmonaire non à petites cellules , Prolifération cellulaire , Tumeurs du poumon , microARN , Protéine proto-oncogène c-ets-1 , ARN circulaire , Humains , Carcinome pulmonaire non à petites cellules/génétique , Carcinome pulmonaire non à petites cellules/anatomopathologie , Carcinome pulmonaire non à petites cellules/métabolisme , microARN/génétique , Tumeurs du poumon/génétique , Tumeurs du poumon/anatomopathologie , Tumeurs du poumon/métabolisme , ARN circulaire/génétique , Souris , Animaux , Protéine proto-oncogène c-ets-1/génétique , Protéine proto-oncogène c-ets-1/métabolisme , Évolution de la maladie , Régulation de l'expression des gènes tumoraux , Apoptose , Souris nude , Tests d'activité antitumorale sur modèle de xénogreffe , Mâle , Femelle , Lignée cellulaire tumorale
20.
NPJ Precis Oncol ; 8(1): 181, 2024 Aug 16.
Article de Anglais | MEDLINE | ID: mdl-39152182

RÉSUMÉ

Deep learning models have been developed for various predictions in glioma; yet, they were constrained by manual segmentation, task-specific design, or a lack of biological interpretation. Herein, we aimed to develop an end-to-end multi-task deep learning (MDL) pipeline that can simultaneously predict molecular alterations and histological grade (auxiliary tasks), as well as prognosis (primary task) in gliomas. Further, we aimed to provide the biological mechanisms underlying the model's predictions. We collected multiscale data including baseline MRI images from 2776 glioma patients across two private (FAHZU and HPPH, n = 1931) and three public datasets (TCGA, n = 213; UCSF, n = 410; and EGD, n = 222). We trained and internally validated the MDL model using our private datasets, and externally validated it using the three public datasets. We used the model-predicted deep prognosis score (DPS) to stratify patients into low-DPS and high-DPS subtypes. Additionally, a radio-multiomics analysis was conducted to elucidate the biological basis of the DPS. In the external validation cohorts, the MDL model achieved average areas under the curve of 0.892-0.903, 0.710-0.894, and 0.850-0.879 for predicting IDH mutation status, 1p/19q co-deletion status, and tumor grade, respectively. Moreover, the MDL model yielded a C-index of 0.723 in the TCGA and 0.671 in the UCSF for the prediction of overall survival. The DPS exhibits significant correlations with activated oncogenic pathways, immune infiltration patterns, specific protein expression, DNA methylation, tumor mutation burden, and tumor-stroma ratio. Accordingly, our work presents an accurate and biologically meaningful tool for predicting molecular subtypes, tumor grade, and survival outcomes in gliomas, which provides personalized clinical decision-making in a global and non-invasive manner.

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