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14
result(s) for
"Wei, Qingcong"
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Cascade enzymes within self-assembled hybrid nanogel mimicked neutrophil lysosomes for singlet oxygen elevated cancer therapy
2019
As the first line of innate immune cells to migrate towards tumour tissue, neutrophils, can immediately kill abnormal cells and activate long-term specific adaptive immune responses. Therefore, the enzymes mediated elevation of reactive oxygen species (ROS) bioinspired by neutrophils can be a promising strategy in cancer immunotherapy. Here, we design a core-shell supramolecular hybrid nanogel via the surface phosphatase triggered self-assembly of oligopeptides around iron oxide nanoparticles to simulate productive neutrophil lysosomes. The cascade reaction of superoxide dismutase (SOD) and chloroperoxidase (CPO) within the bioinspired nanogel can convert ROS in tumour tissue to hypochlorous acid (HOCl) and the subsequent singlet oxygen (
1
O
2
) species. Studies on both cells and animals demonstrate successful
1
O
2
-mediated cell/tumour proliferation inhibition, making this enzyme therapy capable for treating tumours without external energy activation.
Enzymatic reactions caused by neutrophils can cause the elevation of reactive oxygen species (ROS) in tumour tissue, Here, the authors, inspired by the neutrophils, design and test a synthetic cascade reaction which turns ROS into singlet oxygen and demonstrate the application of the designed nanoparticle
Journal Article
Phase transition driven tough hydrogel ionic thermoelectric cell with giant thermopower
2025
The application of quasi-solid ionic thermoelectric (i-TE) cells holds great potential for powering ubiquitous wearable electronics without the need for cables or batteries. However, their practical application is restricted by low thermopower. Herein, a temperature-responsive supramolecular hydrogel, P(N-acryloylsemicarbazide-co-acrylic acid) (PNA), has been developed as a i-TE cell that integrates good mechanical and electrochemical properties. The volume phase transition (VPT) of PNA i-TE cell can generate a substantial ion entropy difference, thereby enhancing both the redox reaction efficiency and ionic thermodiffusion rate. A single PNA i-TE cell can generate a thermopower of 2.04 volts with a temperature difference of 50 K. The Seebeck coefficient (
S
e
), specific output power density (
P
max
/
(
Δ
T
)
2
) and figure of merit (
ZT
) of PNA i-TE cell can reach up to 40.9 mV K
−1
, 35.2 mW m
−2
K
−2
and 1.33 respectively. This ionic hydrogel is promising for the design of high performance polymer based i-TE cells in an environmentally friendly and cost-effective manner.
Quasi-solid ionic thermoelectric cells are promising for wearable electronics, though it is challenging to fabricate devices due to low thermopower. Here the authors report a supramolecular hydrogel to enhance the thermopower for wearable electronics.
Journal Article
The Mechanism of Elizabethkingia miricola Infection of the Black Spotted Frog as Revealed by Multi-Omics Analysis
2024
Elizabethkingia miricola (E. miricola) is a significant pathogen that causes the crooked head disease in black spotted frogs. This disease has plagued numerous frog farms in China and has resulted in substantial losses to the frog farming industry. Nonetheless, the exact mechanism that causes the disease in frogs remains unknown. In this study, transcriptomic and microbiomic analyses were conducted to analyze frog samples infected with E. miricola to reveal the infection mechanism of the pathogen. Liver transcriptomic analysis indicated that the livers of infected frogs had 1469 differentially expressed genes when compared with an uninfected group. These DEGs are mainly involved in immunity and metabolism, including neutrophil extracellular trap formation, the NOD-like receptor signaling pathway, leukocyte transendothelial migration, chemokine signaling pathway, Fc gamma R-mediated phagocytosis, and “metabolism”-related pathways such as the pentose phosphate pathway, carbon metabolism, glycerophospholipid metabolism, and glycerolipid metabolism. Similarly, 4737 DEGs were found in the kidney of infected frogs. These DEGs are mainly involved in immunity, including neutrophil extracellular trap formation, the NOD-like receptor signaling pathway, B cell receptor signaling pathway, C-type lectin receptor signaling pathway, complement and coagulation cascade, and Toll-like receptor signaling pathway. Ten immune-associated DEGs were screened in liver and kidney DEGs, respectively. And it was hypothesized that E. miricola infection could influence the host immune response. Microbiome analysis results showed that some opportunistic pathogens such as Citrobacter, Shigella, and Providencia were significantly elevated (p < 0.05) in infected frogs. Additionally, functional prediction confirmed that most of the microbiota in infected frogs were linked to metabolism-related KEGG pathways. In this study, the screened genes linked to immunity showed an association with the gut microbiome. The majority of these genes were found to be linked with the abundance of opportunistic pathogens. The results showed that E. miricola infection led to the downregulation of immune and metabolic-related genes, which led to the inhibition of immune function and metabolic disorder, and then increased the abundance of opportunistic pathogens in the gut microbiota. The findings of this study offer a preliminary foundation for comprehending the pathogenic processes of E. miricola infection in black spotted frogs.
Journal Article
MnCl2 Nanosheet‐Triggered Mn2+ Storm Enhances Tumor Immunotherapy Through PANoptosis Induction and cGAS‐STING Activation
2026
As a vital component of innate immunity, the cGAS‐STING pathway has attracted widespread attention in cancer therapy, among which Mn2+ has emerged as a promising antitumor agent. Combining cGAS‐STING agonists with chemotherapy or cancer vaccines represents an effective strategy to enhance their therapeutic efficacy. In this study, we construct simple manganese chloride nanosheets (MnCl2 NSs) that achieve combined effects resembling those of cGAS‐STING activation, chemotherapy, and in situ vaccination without requiring additional drugs or energy input. The synthesized MnCl2 NSs release high concentrations of Mn2+ into tumor cells, causing a storm of Mn2+. Through the combined effects of osmotic pressure, chemodynamic therapy (CDT), and cGAS‐STING activation, they significantly enhance the cytotoxicity of MnCl2 and induce DNA damage, thereby achieving chemotherapy‐like combined therapeutic effects. Concurrently, tumor cells undergo PANoptosis, leading to the release of damage‐associated molecular patterns (DAMPs) and tumor antigens, which effectively generate an in situ tumor vaccine, ultimately activating both innate (cGAS‐STING) and adaptive (PANoptosis) immune responses. Our study proposes a novel strategy to synergistically enhance immunotherapy by inducing tumor cell PANoptosis while concurrently activating the cGAS‐STING pathway, offering valuable guidance for the design of immunotherapeutic nanomaterials. This study constructs an ultrasound‐assisted liquid‐phase exfoliated MnCl2 nanosheet system for tumor treatment, establishing an immunotherapy strategy combining PANoptosis induction with cGAS‐STING activation. This treatment system does not require the introduction of additional drugs or energy input, enabling multiple combination therapeutic effects with a minimal increase in side effects.
Journal Article
The Mechanism of IElizabethkingia miricola/I Infection of the Black Spotted Frog as Revealed by Multi-Omics Analysis
by
Xu, Bin
,
Wei, Qingcong
,
Wei, Kaijin
in
Animals
,
Bacterial infections
,
Development and progression
2024
Elizabethkingia miricola (E. miricola) is a significant pathogen that causes the crooked head disease in black spotted frogs. This disease has plagued numerous frog farms in China and has resulted in substantial losses to the frog farming industry. Nonetheless, the exact mechanism that causes the disease in frogs remains unknown. In this study, transcriptomic and microbiomic analyses were conducted to analyze frog samples infected with E. miricola to reveal the infection mechanism of the pathogen. Liver transcriptomic analysis indicated that the livers of infected frogs had 1469 differentially expressed genes when compared with an uninfected group. These DEGs are mainly involved in immunity and metabolism, including neutrophil extracellular trap formation, the NOD-like receptor signaling pathway, leukocyte transendothelial migration, chemokine signaling pathway, Fc gamma R-mediated phagocytosis, and “metabolism”-related pathways such as the pentose phosphate pathway, carbon metabolism, glycerophospholipid metabolism, and glycerolipid metabolism. Similarly, 4737 DEGs were found in the kidney of infected frogs. These DEGs are mainly involved in immunity, including neutrophil extracellular trap formation, the NOD-like receptor signaling pathway, B cell receptor signaling pathway, C-type lectin receptor signaling pathway, complement and coagulation cascade, and Toll-like receptor signaling pathway. Ten immune-associated DEGs were screened in liver and kidney DEGs, respectively. And it was hypothesized that E. miricola infection could influence the host immune response. Microbiome analysis results showed that some opportunistic pathogens such as Citrobacter, Shigella, and Providencia were significantly elevated (p < 0.05) in infected frogs. Additionally, functional prediction confirmed that most of the microbiota in infected frogs were linked to metabolism-related KEGG pathways. In this study, the screened genes linked to immunity showed an association with the gut microbiome. The majority of these genes were found to be linked with the abundance of opportunistic pathogens. The results showed that E. miricola infection led to the downregulation of immune and metabolic-related genes, which led to the inhibition of immune function and metabolic disorder, and then increased the abundance of opportunistic pathogens in the gut microbiota. The findings of this study offer a preliminary foundation for comprehending the pathogenic processes of E. miricola infection in black spotted frogs.
Journal Article
MnCl 2 Nanosheet‐Triggered Mn 2+ Storm Enhances Tumor Immunotherapy Through PANoptosis Induction and cGAS‐STING Activation
2026
As a vital component of innate immunity, the cGAS‐STING pathway has attracted widespread attention in cancer therapy, among which Mn 2+ has emerged as a promising antitumor agent. Combining cGAS‐STING agonists with chemotherapy or cancer vaccines represents an effective strategy to enhance their therapeutic efficacy. In this study, we construct simple manganese chloride nanosheets (MnCl 2 NSs) that achieve combined effects resembling those of cGAS‐STING activation, chemotherapy, and in situ vaccination without requiring additional drugs or energy input. The synthesized MnCl 2 NSs release high concentrations of Mn 2+ into tumor cells, causing a storm of Mn 2+ . Through the combined effects of osmotic pressure, chemodynamic therapy (CDT), and cGAS‐STING activation, they significantly enhance the cytotoxicity of MnCl 2 and induce DNA damage, thereby achieving chemotherapy‐like combined therapeutic effects. Concurrently, tumor cells undergo PANoptosis, leading to the release of damage‐associated molecular patterns (DAMPs) and tumor antigens, which effectively generate an in situ tumor vaccine, ultimately activating both innate (cGAS‐STING) and adaptive (PANoptosis) immune responses. Our study proposes a novel strategy to synergistically enhance immunotherapy by inducing tumor cell PANoptosis while concurrently activating the cGAS‐STING pathway, offering valuable guidance for the design of immunotherapeutic nanomaterials.
Journal Article
Application Characteristics and Industrial Development Countermeasures of Shenmu Semi-coke
2021
The quality index of Shenmu semi-coke is investigated to study its application characteristics, combined with the quality index of Shenmu raw coal and anthracite. Through the analysis of semi-coke products and the environmental protection characteristics in the production process, the ideas for cleaner production are provided. The industrial development countermeasures are put forward based on the development and future demand of Shenmu semi-coke industry.
Journal Article
Quantification of Fat Metaplasia in the Sacroiliac Joints of Patients With Axial Spondyloarthritis by Chemical Shift-Encoded MRI: A Diagnostic Trial
by
Lin, Churong
,
Liu, Budian
,
Xie, Ya
in
Adipose Tissue - diagnostic imaging
,
Adipose Tissue - pathology
,
Adult
2022
To study the diagnostic performance of chemical shift-encoded MRI (CSE-MRI) in the diagnosis of axial spondyloarthritis (axSpA).
CSE-MRI images were acquired for consecutive patients complaining of back pain as well as healthy volunteers. Proton density fat fraction (PDFF) values were measured independently by two readers. Diagnostic performance of CSE-MRI was analyzed by sensitivity analysis and ROC curve analysis. Logistic regression analysis was employed to investigate the risk factors of extensive fat deposition in the SIJs.
A total of 52 r-axSpA patients, 37 nr-axSpA patients, 24 non-SpA patients and 34 healthy volunteers were included. Mean PDFF values in the SIJs of patients with r-axSpA and nr-axSpA (72.7% and 64.5%) were significantly higher than non-SpA patients and healthy volunteers (56.0% and 57.6%) (p<0.001). By defining extensive fat deposition in the SIJs as ≥8 ROIs with PDFF values over 70%, its sensitivity and specificity in diagnosing axSpA reached 72.47% and 86.21%%. By joining bone marrow edema (BME) with ≥8 ROIs (PDFF>70%), 22 (24.71%) and 23 (25.84%) more axSpA patients were classified as SIJ MRI (+) by reader 1 and 2, but specificities decreased by 15.52% and 10.34%. Multivariate logistic regression analysis confirmed longer disease duration as the independent risk factor of extensive fat deposition in SIJs (OR=1.15, 95%CI[1.03, 1.32]), while bDMARDs medication was a protective factor (OR=0.15, 95%CI[0.04, 0.51]).
CSE-MRI is a reliable tool to quantitively assess the fat metaplasia in the SIJs of axSpA patients. Extensive fat deposition in the SIJs could add incremental diagnostic value to BME, but at the cost of decreased specificities.
Journal Article
Changes in lifestyles and depressive symptom among patients with chronic diseases during COVID-19 lockdown
2022
This study aims to investigate the impact of COVID-19 lockdown on lifestyle behaviors and depressive symptom among patients with NCDs (noncommunicable diseases). We incorporated a COVID-19 survey to the WELL China cohort, a prospective cohort study with the baseline survey conducted 8–16 months before the COVID-19 outbreak in Hangzhou, China. The COVID-19 survey was carried out to collect information on lifestyle and depressive symptom during lockdown. A total of 3327 participants were included in the COVID-19 survey, including 2098 (63.1%) reported having NCDs at baseline and 1457 (44%) without NCDs. The prevalence of current drinkers decreased from 42.9% before COVID-19 lockdown to 23.7% during lockdown, current smokers from 15.9 to 13.5%, and poor sleepers from 23.9 to 15.3%, while low physical activity increased from 13.4 to 25.2%, among participants with NCDs (P < 0.05 for all comparisons using McNemar's test). Participants with NCDs were more likely than those without to have depressive symptom (OR, 1.30; 95% CI 1.05–1.61), especially among those who need to refill their medication during the COVID-19 lockdown (OR, 1.52; 95% CI 1.15–2.02). Our findings provide insight into the development of targeted interventions to better prepare patients with NCDs and healthcare system to meet the challenge of future pandemic and lockdown.
Journal Article
Effect of Rosemary on Growth Performance, Meat Quality, Fatty Acid Content, Intestinal Flora, and Antioxidant Capacity of Broilers
2024
Rosemary (Rosmarinus officinalis L.) is a natural spice plant with an aromatic flavor and antioxidant properties that can help enhance the flavor and texture of food, as well as be used as an antioxidant source in pet feed. This study explored the effect of rosemary on the growth performance and antioxidant capacity of broiler chickens. In total, 144 healthy 1-day-old Arbor Acres broilers were randomly divided into four groups: The control group was fed a basic diet, while the positive control group was fed a basic diet supplemented with 30 mg/kg kitasamycin, and the treatment groups were fed a basic diet supplemental with 0.5% rosemary, or 2% rosemary. The average daily feed intake of broilers fed with 0.5% and 2% rosemary in 1–42 days was higher than that in the basal diet group (p < 0.05). The pH was lower in the rosemary groups than in the 30 mg/kg kitasamycin group as measured in the thigh muscle tissue (p < 0.05), and the monounsaturated fatty acid C17:1 heptadecanoic acid content of the 2% rosemary group was higher than that of the other groups (p < 0.05). With 0.5% rosemary supplementation, the activities of the serum and liver antioxidant enzymes catalase (CAT) activity and total antioxidant capacity (T-AOC) increased (p < 0.05); malondialdehyde content decreased (p < 0.05). The serum activities of CAT, total superoxide dismutase, and T-AOC increased with 2% rosemary supplementation (p < 0.05). The relative expression of liver antioxidant genes, the nuclear factor E2-related factor 2, glutathione catalase 1, and superoxide dismutase 1 increased (p < 0.05) with 0.5% rosemary supplementation. The addition of rosemary resulted in higher intestinal lactobacilli counts and lower E. coli counts. In summary, adding 0.5% or 2% rosemary to the diet improved the growth performance of Arbor Acres broilers and increased the number of intestinal probiotics, and supplementing with 0.5% rosemary yielded better results than adding 2% rosemary. This study provides valuable insights into the broader application of plant-derived antioxidants in promoting sustainable and health-focused animal farming practices.
Journal Article