Publications by authors named "De-jun Cui"

Article Synopsis
  • This study examines how Firmicutes bacteria influence macrophage polarization and metabolism in response to intestinal injury due to high-altitude hypoxia.
  • Researchers utilized a mouse model and advanced techniques like single-cell transcriptome sequencing, proteomics, and metabolomics to analyze changes in intestinal health under hypoxic conditions.
  • Findings highlight the significance of HIF-1α and glycolysis in this process, suggesting that macrophage behavior and gut microbiota play crucial roles in managing tissue damage from low oxygen environments.
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Background: Worldwide, ulcerative colitis (UC) is becoming increasingly fast growing. Ginsenoside Rh2 has been reported to alleviate UC. However, the latent biological mechanism of Rh2 in the treatment of UC remains uncertain.

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In this study, we investigated the role of hypoxia in the development of chronic inflammatory bowel disease (IBD), focusing on its impact on the HIF-1α signaling pathway through the upregulation of lipocalin 2 (LCN2). Using a murine model of colitis induced by sodium dextran sulfate (DSS) under hypoxic conditions, transcriptome sequencing revealed LCN2 as a key gene involved in hypoxia-mediated exacerbation of colitis. Bioinformatics analysis highlighted the involvement of crucial pathways, including HIF-1α and glycolysis, in the inflammatory process.

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Article Synopsis
  • Hypobaric hypoxia, often encountered at high altitudes, causes physiological stress, particularly affecting intestinal health and inflammation through changes in the bromodomain protein 4 (BRD4) and the Wnt/β-Catenin signaling pathway.
  • Research utilized transcriptome sequencing and clinical data from altitude sickness patients, highlighting increased serum BRD4 levels associated with inflammation and compromised intestinal barrier integrity.
  • In vitro and mouse model studies demonstrated that hypoxia leads to elevated BRD4 expression and inflammatory markers, which results in weakened tight junctions and intestinal barriers, suggesting that targeting BRD4 could help alleviate these adverse effects.
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Background: Gastric ulcer (GU) is a common digestive tract disease, and medical records of GU combined with depression are increasingly common. Currently, the risk factors and pathogenesis of GU complicated with depression remain unclear. Low immune function and gastrointestinal hormone levels may also be significant risk factors.

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Background: CLDN5 protein is essential for the formation of tight junctions in epithelial cells, and has been associated with epithelial-mesenchymal transition. Research has indicated that CLDN5 is associated with tumor metastasis, the tumor microenvironment, and immunotherapy in multiple types of cancer. Also, no comprehensive evaluation of the expression of CLDN5 and immunotherapy signatures through a pan-cancer analysis or immunoassay has been performed.

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Background: This study commenced to uncover the role of long non-coding RNA FBXL19 antisense RNA 1 (FBXL19-AS1) in the development of ulcerative colitis (UC) and its possible mechanism.

Methods: FBXL19-AS1 expression in the colonic sigmoid mucosa of UC patients was detected. A colitis model was induced in mice using 5% dextran sodium sulfate.

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Intestinal barrier dysfunction is inflammatory bowel disease's hallmark. Berberine (BBR) has manifested its anti-inflammatory properties in colitis. For exploring the molecular mechanism of BBR's impacts on colitis, application of a dextran sodium sulfate-induced mouse colitis model was with recording the body weight, stool consistency, stool occult blood and general physical symptoms of all groups of mice every day.

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Objective: The aim of this study was to identify and validate ferroptosis-related markers in ulcerative colitis (UC) to explore new directions for UC diagnosis and treatment.

Methods: We screened UC chips and ferroptosis-related genes from the Gene Expression Omnibus (GEO), FerrDb, and GeneCards databases. The differentially expressed genes (DEGs) and ferroptosis-related DEGs between the UC group and normal controls were analyzed using bioinformatics methods.

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Circular RNAs (circRNAs) feature prominently in regulating the malignant biological behaviors of colorectal cancer (CRC), including cell viability, cell cycle progression, apoptosis, migration, invasion, and so on. This study is performed to probe into the biological function and molecular mechanism of circ_0087862 in CRC. The expression profile of GSE138589 was available from Gene Expression Omnibus (GEO), and the differentially expressed circRNAs were analyzed by GEO2R.

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Objective: To explore potential mechanisms and effects of gallincin on a mouse model of colitis induced by dextran sulfate sodium (DSS).

Methods: Network pharmacology analysis was used to predict the molecular mechanism of action of gallincin for treatment of colitis. Gallincin was administered orally to mice with DSS-induced colitis.

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Background/aim: Our study aimed to investigate a reliable diagnostic approach for tuberculous peritonitis (TBP) by comparing the commonly used diagnostic tools.

Materials And Methods: Fifty-one patients had received a series of diagnoses, including laparoscopy, erythrocyte sedimentation rate (ESR), cancer antigen 125 (CA125), tuberculin skin test, tuberculosis antibody in serum (TB-Ab), the T-SPOT.TB test, or adenosine deaminase (ADA) in ascitic fluid.

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Background: We aimed to evaluate the associations of gain-of-function allele of *17 and risk of clinical events in clopidogrel-treated patients with cardiovascular and cerebrovascular diseases (CCVDs).

Materials And Methods: Literature search was conducted in PubMed, EMBASE, and Cochrane Library. Odds ratio (OR) combined with 95% confidence interval (CI) was the pooled statistics.

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Objective: To analyze the measles immunity level of persistent population in Beijing.

Methods: A total of 2125 objects from 10 age groups, who had been living in Beijing for over 6 months, were selected from urban and rural areas in Beijing in 2012. Demographic characteristics, history of measles and vaccine immunization were investigated by questionnaire.

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The development of hepatocellular carcinoma (HCC) is attributed to several factors, including chronic viral infection, alcohol consumption, exposure to aflatoxin B1 and metabolic disorders. Several recent reports have shown that HCC can occur in patients with long-standing Crohn's disease (CD) in the absence of other underlying high-risk liver diseases. There may be an association between CD and hepatocarcinogenesis, however, the precise mechanism for this requires further investigations.

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Microglial cells play an important role in mediating neuroinflammation in Alzheimer's disease (AD) by production of a series of proinflammatory mediators and clearance of Aβ peptides and senile plaques. Tetrandrine, a bisbenzylisoquinoline alkaloid isolated from the Chinese herb Radix Stephania tetrandra, has been demonstrated to decrease the expression of proinflammatory mediators by inhibition of NF-κB activation. Here we investigated whether tetrandrine may affect the phagocytosis of microglia and the expression of cytokines and NF-κB in murine BV2 microglial cells.

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Background: The neuroinflammation characterized by glial activation and release of proinflammatory mediators is considered to play a critical role in the pathogenesis of Alzheimer's disease (AD). Tetrandrine, a bisbenzylisoquinoline alkaloid isolated from the Chinese herb radix Stephania tetrandra, has been demonstrated to decrease the expression of proinflammatory mediators by inhibition of nuclear factor-κB (NF-κB) activation. The purpose of the study was to investigate effects of tetrandrine on experimental model of AD.

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Although enteric glial cells (EGCs) have been demonstrated to play a key role in maintaining intestinal epithelial barrier integrity, it is not known how EGCs regulate this integrity. We therefore hypothesized that glial-derived neurotrophic factor (GDNF) produced by EGCs might be involved in this regulation. Here we investigated the role of GDNF in regulating epithelial barrier function in vivo.

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Background: Neuropeptide Y (NPY) from enteric neurons has been shown to play an important role in immune and inflammatory responses. The purpose of the present study was to investigate the effects of NPY antisense oligodeoxynucleotides (ODNs) on an experimental model of ulcerative colitis (UC).

Methods: NPY antisense ODNs were administered in experimental colitis induced by dextran sulfate sodium (DSS).

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Anthocyanins, other flavonoids, and phenolic acids belong to a group of plant natural products with antioxidant activity and may play important roles in plant protection against biotic and abiotic stress and in protection against human diseases. In the present study, the Arabidopsis regulatory gene Production of Anthocyanin Pigment 1 (AtPAP1) was expressed in Brassica napus (canola), and its presence enhanced the antioxidant capacity in transgenic leaves up to 4-fold. Transgenic plants had intense purple coloration, cyanidin and pelargonidin levels were enhanced 50-fold, and quercetin and sinapic acid were 5-fold higher.

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