Publications by authors named "Mengyu Lei"

The rapid growth of population-scale whole genome resequencing, RNA sequencing, bisulfate sequencing, metabolomics and proteomic profiling has led quantitative genetics into a big omics data era. Performing omics data association analysis, such as genome, transcriptome, proteome and methylome wide association analysis, and integrative analysis on multiple omics datasets requires various bioinformatics tools that rely on advanced programming skills and command-line tools, which are challenging for wet-lab biologists. Here, we present EasyOmics a stand-alone R Shiny application with a user-friendly interface for wet-lab biologists to perform population-scale omics data association, integration and visualization.

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Hepatocellular carcinoma (HCC) poses a significant clinical challenge due to high mortality and limited treatment options. Radiofrequency ablation (RFA) is commonly used but can be limited by tumor recurrence. This study explores the potential of combining RFA with an attenuated Salmonella strain carrying siRNA-PD-L1 and endostatin to enhance HCC treatment.

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Background: Glioblastoma (GBM), a common type of brain tumor, is currently treatable through radiation therapy. However, there is room for improvement in the effec-tiveness of treatment. Radiation can lead to an increase in the expression of PD-L1 and VEGF, which might reduce the responsiveness of the tumor to the therapy.

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Article Synopsis
  • - This study investigates how genetic and transcriptomic changes affect the phenotypic plasticity of fitness traits, focusing on flowering times (FTs) in SwedishArabidopsis thaliana accessions under varying temperatures.
  • - Northern accessions flower earlier in cooler temperatures, while southern ones delay their flowering, with these differences linked to their native environments’ temperature stability, impacting their life cycle completion.
  • - The research highlights significant changes in gene co-expression networks and identifies 25 core genes tied to FTs, revealing a relationship between FLC expression sensitivity and flowering time divergence, which is influenced by DNA methylation variations.
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Article Synopsis
  • * The study found that Endostatin, a broad-spectrum and low-toxicity angiogenesis inhibitor, increased CD8 T cell infiltration while decreasing M2 tumor-associated macrophages in the melanoma microenvironment, but also revealed high levels of the immune checkpoint PD-1, which allows tumors to evade immune detection.
  • * Researchers developed a plasmid that combines Endostatin with PD-1 siRNA and used attenuated Salmonella to deliver it in melanoma-bearing mice, resulting in enhanced therapeutic effects; this combined therapy effectively
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Manganese (Mn) toxicity is mainly caused by excessive Mn content in drinking water and occupational exposure. Moreover, overexposure to Mn can impair mental, cognitive, memory, and motor capacities. Although melatonin (Mel) can protect against Mn-induced neuronal damage and mitochondrial fragmentation, the underlying mechanism remains elusive.

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Excessive manganese (Mn) exposure can cause nerve damage and mitochondrial dysfunction, which may involve defects in mitochondrial dynamics. Resveratrol (RSV) exerts a wide range of beneficial effects via activation of sirtuin 1 (SIRT1) and thus may positively impact Mn-induced mitochondrial damage through the regulation of peroxisome proliferator-activated receptor-gamma coactivator 1-alpha (PGC-1α) by SIRT1. In this study, we investigated the molecular mechanisms by which RSV alleviates the nerve injury and mitochondrial fragmentation caused by Mn in C57 BL/6 mice.

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Exposure to excess levels of manganese (Mn) leads to neurotoxicity. Increasing evidence demonstrates that oxidative stress and neuroinflammation are important pathological causes of neurotoxicity. Resveratrol (Rsv), a sirtuin-1 (SIRT1) activator, plays an important role in neuroprotection.

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Chronic manganese (Mn) exposure is related to elevated risks of neurodegenerative diseases, and mitochondrial dysfunction is considered a critical pathophysiological feature of Mn neurotoxicity. Although previous research has demonstrated Mn-induced alpha-synuclein (α-Syn) overexpression, the role of α-Syn in mitochondrial dysfunction remains unclear. Here, we used Wistar rats and human neuroblastoma cells (SH-SY5Y cells) to elucidate the molecular mechanisms underlying how α-Syn overexpression induced by different doses of Mn (15, 30, and 60 mg/kg) results in mitochondrial dysfunction.

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