Publications by authors named "Meizhen Xu"

Article Synopsis
  • Soup plays a vital role in our diet, but how the body absorbs and transports its nutrients, especially from colloidal nanoparticles (CNPs) in lamb soup, is not well understood.
  • Researchers used Caco-2 cell models to examine how these CNPs are absorbed and released, discovering that specific inhibitors can affect these processes.
  • The study found that absorption occurs mainly through caveolin-dependent endocytosis, macropinocytosis, and phagocytosis, while transport involves microtubule-mediated support to help CNPs reach the cell membrane and Golgi apparatus.
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Article Synopsis
  • The quality of farmland soil is crucial for human health and agriculture, necessitating an assessment of heavy metal pollution sources to mitigate risks.
  • This study used geostatistical analysis and an APCS-MLR model to identify and quantify pollution sources, revealing that metals like As, Cr, Cd, Pb, Zn, and Cu are enriched in the soil.
  • Major pollution sources include atmospheric deposition and agricultural activities, contributing significantly to ecological risks, accounting for 56.21% and 36.01%, respectively, thus highlighting the need for targeted pollution management strategies.
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Colloidal nanoparticles (CNPs), as carriers of nutrients, naturally exist in food or form during cooking. In this study, the colloidal properties, structures, rheological properties, and chemical composition location of CNPs were analyzed during 15 min to 5 h lamb soup stewing. With the increasing stewing time, the particle size and absolute value of the zeta potential of CNPs increased, indicating that CNPs became more stable.

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T and B lymphocytes are crucial players in cellular and humoral immune responses. The development, activation and differentiation of T and B lymphocytes are regulated by the best characterized PI3K-PI (3,4,5) P3-AKT phosphoinositide signalling pathway. As a branch of the phosphoinositide signalling pathway, the lipid phosphatase INPP4B inhibits AKT activation through degrading the phosphoinositide signalling messenger PI (3,4) P2.

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The correlation between cuff inflatable hypertension and the difference in interarm diastolic pressure induced by single arm ischemia is investigated. A total of 126 patients undergoing coronary angiography in our hospital from January 2020 to January 2021 are selected and divided into the non-pseudohypertension (non-PHT) group (64 cases) and the PHT group (62 cases) according to the difference between systolic blood pressure and diastolic blood pressure measured directly and indirectly. The patients are subjected to the beam arm ischemia test and blood pressure measurement.

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B-1 lymphocytes exhibit specialized roles in host defense against multiple pathogens. Despite the fact that CD19CD93B220 B cells have been identified as B-1 progenitors, the definition for B-1 progenitors remains to be elucidated as CD19CD93B220 B cells are capable to give rise to B-1 cells. Given that transcription factor Bhlhe41 is highly and preferentially expressed in B-1 cells and regulates B-1a cell development, we generated a transgenic mouse model, , for fate mapping and functional analysis of B-1 cells.

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Allergic diseases are caused by dysregulated Th2 immune responses involving multiple effector cells including basophils. Short chain fatty acids (SCFAs), mainly acetate, propionate and butyrate, exert immunomodulatory functions via activation of its receptors GPR41 and GPR43, and inhibition of the histone deacetylases (HDACs) activity. In allergic diseases, SCFAs suppress the activity of mast cells, eosinophils and type 2 innate lymphoid cells (ILC2) but enhance the function of Th2 cells.

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Introduction: To investigate the effects and mechanism of action of upregulated CRLF2 expression resulting from different aberrations in the CRLF2 gene (CRLF2, CRLF2 + IK6, P2RY8-CRLF2 and CRLF2 F232C) in the B cell ALL cell line Nalm6.

Methods: Cell proliferation was measured using cell counting kit-8. Transcriptome sequencing technology (RNA-seq) was used to compare changes in gene expression resulting from different aberrations in CRLF2.

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The invasion and egress are two key steps in lytic cycle vital to the propagation of infection, and phosphorylation is believed to play important roles in these processes. However, the phosphoproteome of at these two stages has not been characterized. In this study, we profiled the phosphoproteome of tachyzoites at the stages of "just invading" (JI) and "prior to egress" (PE) based on iTRAQ quantitative analysis, in which a total of 46 phosphopeptides, 42 phosphorylation sites, and 38 phosphoproteins were detected.

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Human basophils regulate allergic reactions by secreting histamine, interleukin 4 (IL-4) and IL-13 through key surface receptors FcεRI as well as IL-3R, which are constitutively expressed on basophils. IL-3/IL-3R signaling axis plays key roles in regulating the development and activation of basophils. We and others have shown that IL-3-induced surface receptors e.

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Basophils are important effector cells in allergic disorders and anti-parasitic immune response. A number of activators including interleukin 3 (IL-3) and IgE have been identified in the regulation of human basophils expressing mediators such as histamine and leukotriene C4 (LTC4) and cytokines, including IL-4 and IL-13. Human basophils express high levels of IL-2 receptors.

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HIV-positive individuals encounter a number of negative life events (NLEs). This cross-sectional study aimed to evaluate the association between NLEs and major depressive disorder (MDD) among HIV-positive individuals in Guangdong, China, about which little is known.HIV-positive individuals were recruited from the Centers for Disease Prevention and Control of Guangzhou, Zhongshan, and Yangjiang from September 2007 to September 2008.

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The biochars are efficient adsorbent of heavy metals. However, the type of biochar species determines the effectiveness of biochars for immobilization of heavy metals. In this experiment, we mixed different biochars in variable mass ratios and evaluated their effects on plant growth and bioavailability of heavy metals.

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Background: People living with HIV may suffer from mental disorders. We aimed to explore the prevalence of and factors associated with major depressive disorder (MDD) among HIV-positive individuals in Guangdong, China, about which little is known.

Methods: A cross-sectional study was conducted to recruit HIV-positive individuals from the Centers for Disease Prevention and Control of Guangzhou, Zhongshan, and Yangjiang from September 2007 to September 2008.

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It is suspected that rs1047768 and rs17655 polymorphisms influence the response to platinum-based chemotherapy. This meta-analysis was performed to summarize the scattered evidence regarding the association between these two polymorphisms and sensitivity to platinum-based treatment. Thirteen studies were included after a comprehensive literature search.

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Purpose: Multidrug resistance mediated by ABCB1 has been perceived to be one of the obstacles for cancer chemotherapy. This meta-analysis was performed to verify the effect of the ABCB1 rs1045642 and rs1128503 polymorphisms on the response to Taxane-containing chemotherapy.

Methods: Pooled odds ratios (ORs) and corresponding 95% confidence intervals (CIs) were employed to evaluate the impact of these two ABCB1 polymorphisms.

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Background: Primulina Hance is an emerging model for studying evolutionary divergence, adaptation and speciation of the karst flora. However, phylogenetic relationships within the genus have not been resolved due to low variation detected in the cpDNA regions. Chloroplast genomes can provide important information for phylogenetic and population genetic studies.

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We produced (S)-4-cyano-3-(4-chlorophenyl)-butyrate by highly stereoselective biocatalyst in this study. A nitrilase-producing strain, named Gibberella intermedia WX12, was isolated by 3-(4-chlorophenyl)-glutaronitrile as substrate in the screening with phenol-sodium hypochlorite method. The fermentation conditions and catalytic properties of this strain were investigated.

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