Publications by authors named "Guan-Jun Yang"

Porcupine (PORCN) is a membrane-bound O-acyltransferase primarily localized in the endoplasmic reticulum, where it catalyzes the palmitoylation of Wnt proteins-a critical post-translational modification required for their secretion and signal transduction. This lipid modification plays a key role in regulating essential cellular processes such as differentiation, proliferation, migration, and apoptosis. Inhibition of PORCN prevents Wnt palmitoylation, thereby blocking its extracellular transport and downstream signaling, including β-catenin production, which ultimately suppresses aberrant cell growth.

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Protein kinases are key regulators of cellular signaling, metabolism, and essential functions, acting as molecular switches through phosphorylation. Their dysregulation is implicated in a wide range of pathologies, including cancer and autoimmune disorders, making them attractive therapeutic targets. PKN3, a serine-threonine kinase of the AGC family within the protein kinase N (PKN) subfamily (PKN1-3), plays a critical role in cytoskeletal dynamics and gene [expression through its interactions with Rho GTPases.

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Pulpitis, a prevalent inflammatory disease of dental pulp, is primarily driven by bacterial infections and other irritants, leading to irreversible pulp damage if untreated. Recent research highlights the pivotal role of microRNAs (miRNAs) in regulating the molecular mechanisms underlying pulpitis. This review synthesizes current research on miRNAs in pulpitis pathogenesis, highlighting their involvement in inflammation response and cell differentiation.

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The advent of precision therapy has revolutionized breast cancer treatment, driven by the development of innovative diagnostic techniques and targeted drugs. Identifying biomarkers related to therapy response is crucial for tailoring treatment strategies for breast cancer patients. Liquid biopsies have emerged as minimally invasive techniques for biomarker profiling, leveraging the increasing sensitivity for detecting oncogenic drivers.

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Ubiquitination is one of the most well-known post-translational modifications in eukaryotes. UBC13 is an E2 ubiquitin coupling enzyme, which interacts with different E3 ligases and exerts ubiquitination activity to assemble and synthesize lysine-63-linked (Lys63) ubiquitin strands, thus playing an important role in cell homeostasis, various diseases caused by inflammation, and the occurrence and development of cancer. In this paper, we review the structure and function of UBC13, summarize the diverse pathways it mediates, and discuss its involvement in bacterial and non-bacterial inflammatory diseases.

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Interleukin-33 (IL-33) is a nuclear factor and member of the IL-1 cytokine family. IL-33 is mainly expressed by epithelial and endothelial cells and exerts its function through interaction with various immune cells, and binding to its receptor can form the IL-33/Suppression of tumorigenicity 2 (ST2) signaling pathway. While most cytokines are actively synthesized within cells, IL-33 is produced passively in response to tissue damage or cell necrosis, indicating its role as a signaling molecule following cellular infection, stress, or trauma.

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Interleukins (ILs) are potent secreted regulators of a wide range of cell types and cellular activities, particularly in the immune system. They are able to participate in intercellular communication in homeostasis and disease, thereby exerting immune functions. Macrophages serve as the innate immune cells of vertebrates and play a pivotal role in defending against and eliminating external pathogens.

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  • UBE2T is an important enzyme in the ubiquitin-proteasome system (UPS) that regulates various cellular processes, including cell growth and apoptosis, and high levels of it have been linked to multiple types of cancer.
  • Its overexpression is associated with disease progression and worse survival rates, indicating its potential as a molecular biomarker for cancer prognosis.
  • The review discusses UBE2T's functions and mechanisms in cancer, highlighting the potential for UBE2T-targeted therapies to improve cancer diagnosis and treatment strategies.
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Protein arginine methyltransferase 7 (PRMT7), a type III methyltransferase responsible solely for arginine mono-methylation, plays a critical role in numerous physiological and pathological processes. Recent studies have highlighted its aberrant expression or mutation in various cancers, implicating it in tumorigenesis, cancer progression, and drug resistance. Consequently, PRMT7 has emerged as a promising target for cancer diagnosis and therapeutic intervention.

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In the last decade, research has clarified the binding interactions between immunoglobulin E (IgE) and its high-affinity receptor, the FcεRI alpha chain (FcεRI). The formation of the IgE-FcεRI complex is crucial in the context of atopic allergies, linking allergen recognition to cellular activation and disease manifestation. Consequently, pharmacological strategies that disrupt these interactions are vital for managing atopic conditions.

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  • * Virtual screening of over 100,000 compounds identified 12 potential inhibitors, with compound 4 showing the most promise in blocking KDM7A's activity, leading to reduced breast cancer stem cells and cell cycle arrest.
  • * The research also highlights MKRN1 as a significant gene influenced by KDM7A, further revealing the potential of compound 4 as an effective treatment option for both drug-resistant and sensitive triple-negative breast cancer.
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Triple-negative breast cancer (TNBC) is a subtype of breast cancer with high mortality and drug resistance and no targeted drug available at present. Compound , a staurosporine alkaloid derived from sp. NBU3142 in a marine sponge, exhibits potent anti-TNBC activity.

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Jumonji domain-containing protein D3 (JMJD3) is a 2-oxoglutarate-dependent dioxygenase that specifically removes transcriptional repression marks di- and tri-methylated groups from lysine 27 on histone 3 (H3K27me2/3). The erasure of these marks leads to the activation of some associated genes, thereby influencing various biological processes, such as development, differentiation, and immune response. However, comprehensive descriptions regarding the relationship between JMJD3 and inflammation are lacking.

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  • Ubiquitin-Conjugating Enzyme 5 (UBC5) is being studied as a potential target for therapies related to various diseases, particularly cancers, due to its key roles in processes like apoptosis and DNA repair.
  • Research on UBC5 has been slower compared to other ubiquitin-coupled enzymes, yet it's shown to be crucial in ubiquitinating proteins linked to disease and cellular homeostasis.
  • Recent insights into the similarities between UBC5 and its homologues (UBC1 and UBC4) are improving our understanding of how UBC5 functions in protein degradation and cellular regulation, highlighting its importance in disease treatment strategies.
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  • - Licorice, specifically the Glycyrrhiza genus, has a long history of medicinal use, with its active component Glycyrrhizin (GLY) recognized for various health benefits, including anti-inflammatory and antibacterial properties.
  • - Current research focuses on GLY's antiviral effects, but it also shows substantial antibacterial activity by inhibiting bacterial growth and enhancing host immune responses, which may help combat bacterial infections.
  • - The paper reviews GLY's mechanisms against pathogenic bacteria, its role in immune regulation, and suggests that combining it with other antibiotics could improve treatment for drug-resistant bacteria, supported by extensive research from various scientific databases.
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  • * USP36 removes ubiquitin chains from proteins, which leads to their degradation through the proteasome, and its functions are linked to various health issues like cancer, infections, and inflammation.
  • * This review aims to summarize current research on USP36's roles in diseases, enhancing our understanding of the underlying mechanisms and highlighting potential targets for therapeutic intervention.
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Breast cancer (BC) is the most frequent malignant cancer diagnosis and is a primary factor for cancer deaths in women. The clinical subtypes of BC include estrogen receptor (ER) positive, progesterone receptor (PR) positive, human epidermal growth factor receptor 2 (HER2) positive, and triple-negative BC (TNBC). Based on the stages and subtypes of BC, various treatment methods are available with variations in the rates of progression-free disease and overall survival of patients.

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  • - USP21, a member of the Ubiquitin-specific peptidases (USPs), plays a critical role in various cellular processes like apoptosis and DNA repair, but research on it has been slow.
  • - Over the past decade, studies have shown that USP21 helps remove ubiquitin from key proteins that affect cell functions related to diseases, especially various cancers.
  • - The review highlights USP21's structure and its involvement in cancer development, along with promising advancements in small-molecule inhibitors aimed at targeting USP21 for potential cancer treatments.
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  • RNA-binding proteins (RBPs), like CELF1, are crucial in managing RNA processes such as splicing and translation, influencing both normal and disease states in the body.
  • CELF1 specifically interacts with GU-rich elements in mRNA and is linked to the development of various malignant diseases, suggesting it could be a promising target for treatment.
  • The text discusses CELF1's structure, function, regulatory mechanisms, and the challenges in studying its role, emphasizing the importance of developing targeted therapies that involve CELF1.
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Perovskite solar cells (PSCs) are among the most promising photovoltaic technologies owing to their exceptional optoelectronic properties. However, the lower efficiency, poor stability and reproducibility issues of large-area PSCs compared with laboratory-scale PSCs are notable drawbacks that hinder their commercialization. Here we report a synergistic dopant-additive combination strategy using methylammonium chloride (MACl) as the dopant and a Lewis-basic ionic-liquid additive, 1,3-bis(cyanomethyl)imidazolium chloride ([Bcmim]Cl).

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Aims: Qipian® is a commercialized agent composed of extracts of three genera of commensal bacteria, and its mechanism of action on asthma is unclear. This study aimed to examine the impact of Qipian® on airway inflammation and investigate the underlying mechanisms.

Materials And Methods: Qipian® or dexamethasone (DEX) was administered before OVA challenge in an ovalbumin-induced asthma mouse model, and then asthmatic symptoms were observed and scored.

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Although rhabdovirus (MSRV) causes serious fish epidemics worldwide, the detailed mechanism of MSRV entry into host cells remains unknown. Here, we comprehensively investigated the mechanism of MSRV entry into epithelioma (EPC) cells. This study demonstrated that MSRV enters EPC cells via a low pH, dynamin-dependent, microtubule-dependent, and clathrin-mediated endocytosis.

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Histone demethylation is a kind of epigenetic modification mediated by a variety of enzymes and participates in regulating multiple physiological and pathological events. Lysine-specific demethylase 7A is a kind of α-ketoglutarate- and Fe(II)-dependent demethylase belonging to the PHF2/8 subfamily of the JmjC demethylases. KDM7A is mainly localized in the nucleus and contributes to transcriptional activation via removing mono- and di-methyl groups from the lysine residues 9 and 27 of Histone H3.

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