Publications by authors named "Simeng Liu"

This study aimed to investigate the impact of controlling serum homocysteine on improving surgical outcomes in patients with moyamoya disease (MMD) and hyperhomocysteinemia. In this prospective observational cohort study, 477 patients with MMD post-encephaloduroarteriosynangiosis are divided into the HHcy-MMD post-control group (n = 193), HHcy-MMD uncontrolled group (n = 91), and MMD group (n = 193), with the HHcy-MMD post-control group further subdivided into good (homocysteine 0-10 μmol/L, n = 121) and general (homocysteine 10-15 μmol/L, n = 72) control groups. The differences in imaging and long-term clinical prognosis among the three groups were compared.

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Background: Firstly, 5-hydroxytryptamine G-protein-coupled receptors () are a family of 13 genes associated with cancer progression. Nevertheless, a comprehensive understanding of in cancer remains largely lacking.

Method: We tested the gene expression levels and prognostic values for the in relation to pan-cancer.

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Septic acute kidney injury (AKI) is an important risk factor for developing chronic kidney disease (CKD). Hu antigen R (HuR) is recognized as a crucial modulator in inflammation. We hypothesized that elevated HuR contributes to the transition from septic AKI to CKD by promoting persistent inflammation and fibrosis, and inhibition of HuR may reverse septic kidney injury.

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Polymer/gold nanoparticle (AuNP) composites have been utilized as floating gates to enhance the performance of memory devices. However, these devices typically exhibit a low ON/OFF drain current ratio (/) and unstable charge trapping, attributed to the poorly defined arrangement of AuNPs within the composite floating gate. To address these limitations, this study employs poly(methyl methacrylate)-grafted AuNPs (Au@PMMA) as building blocks for the fabrication of monolayered superlattice films with a highly ordered structure via liquid/liquid interfacial assembly.

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Amino-berberine has remained underexplored due to limited biological evaluation and total synthesis approaches. In inflammation therapy, soluble Epoxide Hydrolase (sEH) is a promising target, yet natural scaffolds remain underutilized. Our study advances the field by redesigning natural compounds─berberine and sanguinarine─with strategic urea modifications and hydrogenated frameworks, creating novel sEH inhibitors with enhanced efficacy.

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Background: Moyamoya disease (MMD) and moyamoya syndrome (MMS) are rare cerebrovascular conditions with unclear distinctions in clinical presentation and prognosis.

Aim: This study assessed potential differences between MMD and MMS patients using real-world data on clinical manifestations, surgical outcomes, and stroke risk factors.

Methods: This multicenter, retrospective cohort study examined patients with MMD or MMS treated at three tertiary academic hospitals in China, with a mean follow-up of 11.

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NAD (Nicotinamide Adenine Dinucleotide) -related metabolic reprogramming in tumor cells involves multiple vital cellular processes. However, the role of NAD metabolism in immunity and the prognosis of gastric cancer (GC) remains not elucidated. Here we identified and clustered 33 NAD + metabolism-related genes (NMRGs) based on 808 GC samples from the Cancer Genome Atlas (TCGA) and the Gene Expression Omnibus (GEO) databases.

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Dysregulated expression of ribosomal protein S3A (RPS3A) is associated with the tissue infiltration of immune-related cells in a variety of cancers. However, the role of RPS3A in immune cell infiltration in glioma remains unclear. This study aimed to explore the role of RPS3A in the glioma immune microenvironment.

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In this study, the liquid culture system of Pleurotus nebrodensis mycelium with high yield were established by using orthogonal experiments. Results indicated a 58.08 % increase in mycelium biomass and a 2.

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There are few reports on soluble epoxide hydrolase (sEH) structure-activity relationship studies using natural product-based scaffolds. In this study, we discovered that C-30 urea derivatives of glycyrrhetinic acid such as 33, rather than C-20/C-3 urea derivatives, possess in vitro sEH inhibitory capabilities. Furthermore, we explored the impact of stereoconfigurations at C-3 and C-18 positions, and glycosidic bonds at the 3-OH on the compound's activity.

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Article Synopsis
  • There are currently no specific drugs available for treating acute pancreatitis, but soluble epoxide hydrolase (sEH) inhibitors show potential despite challenges with drug concentration and side effects.
  • Researchers developed a new series of phenylquinoline-based sEH inhibitors that effectively reduce pain and inflammation by inhibiting sEH enzyme activity.
  • One of these compounds, DJ-53, demonstrated excellent oral bioavailability, improved pharmacokinetics, and safety by not affecting CYP enzymes or the hERG channel, making it a promising candidate for future anti-inflammatory treatments.
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  • The study aimed to evaluate a new intracardiac echocardiography (ICE) catheter’s effectiveness, image clarity, and practicality during heart procedures on human subjects.
  • Two patients were tested with the catheter, and post-procedure evaluations showed it performed comparably to existing catheters, providing detailed imaging without complications.
  • Preliminary results indicate the new catheter is safe and effective for complex heart interventions, emphasizing the need for specialized sheaths to reduce complications.
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  • This study looked at how two diseases, Systemic Lupus Erythematosus (SLE) and moyamoya disease (MMD), might be related through certain genes and immune cells.!
  • Researchers used a variety of data analysis techniques to find common genes between SLE and MMD, discovering some important ones that could help understand both diseases.!
  • They found that specific immune cells, especially T cells and monocytes, are especially active in both diseases, suggesting they play an important role in how SLE and MMD might be linked.!
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  • Moyamoya disease (MMD) affects blood vessels in the brain and progresses faster in children than adults, prompting this study to explore age-related differences through proteomic and metabolomic profiling.
  • Six children and six adults with MMD, alongside healthy controls, underwent detailed blood analysis to identify differences in proteins and metabolites using advanced techniques.
  • Results showed significant variations between pediatric and adult MMD patients, highlighting key pathways related to immunity and inflammation and emphasizing the importance of vitamin digestion in the pediatric form of the disease.
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Ketolides (3-keto) such as TE-802 and acylides (3-O-acyl) like TEA0929 are ineffective against constitutively resistant pathogens harboring erythromycin ribosomal methylation (erm) genes. Following our previous work on alkylides (3-O-alkyl), we explored the structure-activity relationships of hybrids combining (R/S) 3-descladinosyl erythromycin with 6/7-quinolone motifs, featuring extended ether-linked spacers, with a focus on their efficacy against pathogens bearing constitutive erm gene resistance. Optimized compounds 17a and 31f not only reinstated efficacy against inducibly resistant pathogens but also demonstrated significantly augmented activities against constitutively resistant strains of Streptococcus pneumoniae and Streptococcus pyogenes, which are typically refractory to existing C-3 modified macrolides.

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  • This study is about gastric intestinal metaplasia (IM), a condition that can lead to stomach cancer, and how a medicine called metformin could help treat it.
  • Researchers used different databases to find genes related to IM and metformin, discovering 99 common genes that could be important for treatment.
  • The results showed that metformin changed how certain genes work, which helped slow down the effects of IM in mice, showing promise as a treatment option.
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  • - Autism Spectrum Disorder (ASD) is linked to gastrointestinal dysfunction and altered gut microbiota, affecting social skills and repetitive behaviors; this study explores how probiotics can interact with gut health in ASD mouse models.
  • - Mice models showed compromised intestinal barriers, with increased permeability and inflammation markers; C. butyricum probiotic helped enhance intestinal barrier function and mitigate behavioral issues in these mice.
  • - Results suggest that gut microbiota plays a significant role in ASD via the gut-brain axis, indicating that C. butyricum probiotics could be a potential therapeutic avenue for improving gut health and behavioral symptoms in ASD.
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Conventional macrolide-lincosamide-streptogramin B-ketolide (MLSK) antibiotics are unable to counter the growing challenge of antibiotic resistance that is conferred by the constitutive methylation of rRNA base A2058 or its G2058 mutation, while the presence of unmodified A2058 is crucial for high selectivity of traditional MLSK in targeting pathogens over human cells. The absence of effective modes of action reinforces the prevailing belief that constitutively antibiotic-resistant Staphylococcus aureus remains impervious to existing macrolides including telithromycin. Here, we report the design and synthesis of a novel series of macrolides, featuring the strategic fusion of ketolide and quinolone moieties.

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Protein phosphatase 2A (PP2A) is an abundant heterotrimeric holoenzyme in eukaryotic cells coordinating with specific kinases to regulate spatial-temporal protein dephosphorylation in various biological processes. However, the function of PP2A in cortical neurogenesis remains largely unknown. Here, we report that neuronal-specific deletion of Pp2acα in mice displayed microcephaly, with significantly smaller brains and defective learning and memory ability.

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We report here on the structure-activity relationships of hybrids combining 3-descladinosyl clarithromycin with quinolones linked by extended diamine connectors. Several hybrids, exemplified by 23Bc, 23Be, 23Bf, 26Be, and 30Bc, not only restored potency against inducibly resistant pathogens but also exhibited significantly enhanced activities against constitutively resistant strains of Staphylococcus pneumoniae and Staphylococcus pyogenes, which express high-level resistance independent of clarithromycin or erythromycin induction. Additionally, the novel hybrids showed susceptibility against Gram-negative Haemophilus influenzae.

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Background: Gastrointestinal cancer poses a considerable global health risk, encompassing a heterogeneous spectrum of malignancies that afflict the gastrointestinal tract. It is significant to develop efficacious therapeutic agents, as they are indispensable for both the treatment and prevention of this formidable disease.

Methods: In this study, we synthesized a novel thiophene derivative, designated as compound 1312.

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Background: The M-type phospholipase A2 receptor (PLA2R)-associated primary membranous nephropathy (PMN) is an immune-related disease in adults with increasing morbidity and variable treatment response, in which inflammation may contribute to the multifactorial immunopathogenesis. The relationship between fibrinogen-albumin ratio (FAR), serving as a novel inflammatory biomarker, and PMN is still unclear. Therefore, this study aims to clarify the association between FAR and disease activity and therapy response of PMN.

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Background: Gastric intestinal metaplasia (GIM) is an essential precancerous lesion. Although the reversal of GIM is challenging, it potentially brings a state-to-art strategy for gastric cancer therapeutics (GC). The lack of the appropriate in vitro model limits studies of GIM pathogenesis, which is the issue this work aims to address for further studies.

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