Publications by authors named "Youdong Chen"

Psoriasis is a chronic inflammatory skin disorder characterized by keratinocyte hyper-proliferation and immune dysregulation. Recent evidence has implicated dysregulated polyunsaturated fatty acid (PUFA) metabolism in its pathogenesis. In this study, fatty acid desaturase 2 (FADS2), the rate-limiting Δ6-desaturase in PUFA biosynthesis, is identified as a central regulator of psoriatic inflammation.

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Article Synopsis
  • Gasdermin-mediated pyroptosis can enhance the immune response against tumors by releasing mitochondrial DNA (mtDNA) that activates the cGAS-STING pathway, but triggering this process in cancer cells is challenging.
  • To address this, the study developed cobalt fluoride (CoF) nanocatalysts that can induce pyroptosis and generate reactive oxygen species (ROS), leading to mtDNA release in cancer cells.
  • By also serving as STING agonists, CoF nanocatalysts help amplify the cGAS-STING pathway, transforming the tumor environment into an immune-supportive state, which potentially improves the effectiveness of cancer therapies like immune checkpoint inhibitors.
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Malignant tumors pose a significant threat to global public health. Promoting programmed cell death in cancer cells has become a critical strategy for cancer treatment. PANoptosis, a newly discovered form of regulated cell death, integrates key molecular components of pyroptosis, apoptosis, and necroptosis, activating these three death pathways simultaneously to achieve synergistic multi-mechanistic killing.

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PANoptosis has recently emerged as a potential approach to improve the immune microenvironment. However, current methods for inducing PANoptosis are limited. Herein, through biological screening, the rational use of the nutrient metal ions Cu and Zn had great potential to induce PANoptosis.

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Immunotherapy holds significant promise for cancer treatment. However, the highly immunosuppressive nature of solid tumors limits its effectiveness. Herein, we developed bioactive zinc-nickel hydroxide (ZnNi(OH)) nanosheets (NSs) that can effectively initiate the paraptosis-pyroptosis positive feedback cycle through synergistic ionic effect, thereby mitigating the immunosuppression of solid tumors and enhancing the efficacy of immunotherapy.

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Hydrogen (H) therapy has demonstrated antitumor effect, but the therapeutic efficacy is restricted by the low solubility and nontarget delivery of H. Electrolysis of HO by electrocatalysts sustainably releases enormous amounts of H and inspires the precise delivery of H for tumor therapy. Herein, manganese-doped NiS nanoelectrodes (MnNiS NEs) are designed for the electrocatalytic delivery of H and the activation of antitumor immunity to effectively potentiate H-immunotherapy.

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  • Disrupted methyladenosine (mA) modification is linked to inflammatory skin disorders, with reduced levels observed in keratinocytes affected by these conditions.
  • The deletion of mA in mouse keratinocytes triggers spontaneous skin inflammation and intensifies neutrophil activity, worsening inflammation.
  • Restoring mA can relieve skin disease symptoms in both mice and human skin samples, suggesting a new therapeutic approach focusing on mA modulation to treat inflammatory skin diseases.
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Pyroptosis, an inflammatory modality of programmed cell death associated with the immune response, can be initiated by bioactive ions and reactive oxygen species (ROS). However, bioactive ion-induced pyroptosis lacks specificity, and further exploration of other ions that can induce pyroptosis in cancer cells is needed. Sonocatalytic therapy (SCT) holds promise due to its exceptional penetration depth; however, the rapid recombination of electron-hole (e-h) pairs and the complex tumor microenvironment (TME) impede its broader application.

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Iron metabolism has emerged as a promising target for cancer therapy; however, the innate metabolic compensatory capacity of cancer cells significantly limits the effectiveness of iron metabolism therapy. Herein, bioactive gallium sulfide nanodots (GaS), with dual functions of "reprogramming" and "interfering" iron metabolic pathways, were successfully developed for tumor iron metabolism therapy. The constructed GaS nanodots ingeniously harness hydrogen sulfide (HS) gas, which is released in response to the tumor microenvironment, to reprogram the inherent transferrin receptor 1 (TfR1)-ferroportin 1 (FPN1) iron metabolism axis in cancer cells.

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  • Pyroptosis is a type of programmed cell death triggered by the immune system and can be initiated by reactive oxygen species (ROS), which play a key role in fighting cancer cells.
  • Sonodynamic therapy (SDT) utilizing fluorinated titanium oxide (TiOF) sonosensitizers shows promise for inducing pyroptosis in cancer cells through ultrasound, enhancing the effectiveness of the immune response.
  • The structural modifications of TiOF improve its capabilities to generate ROS under ultrasound stimulation, leading to significant mitochondrial damage in cancer cells, suppressing tumor growth, and promoting lasting immune memory to prevent tumor recurrence.
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Currently, sonodynamic therapy (SDT) has limited therapeutic outcomes and immune responses, highlighting the urgent need for enhanced strategies that can stimulate robust and long-lasting antitumor effects. Microcystis, a notorious microalga, reveals the possibility of mediating SDT owing to the presence of gas vesicles (GVs) and phycocyanin (PC). Herein, a nontoxic strain of Microcystis elabens (labeled Me) is developed as a novel agent for SDT because it generates O under red light (RL) illumination, while GVs and PC act as cavitation nuclei and sonosensitizers, respectively.

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The immunosuppressive microenvironment of cervical cancer significantly hampers the effectiveness of immunotherapy. Herein, PEGylated manganese-doped calcium sulfide nanoparticles (MCSP) were developed to effectively enhance the antitumor immune response of the cervical cancer through gas-amplified metalloimmunotherapy with dual activation of pyroptosis and STING pathway. The bioactive MCSP exhibited the ability to rapidly release Ca, Mn, and HS in response to the tumor microenvironment.

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Immunotherapy has emerged as a potential approach for breast cancer treatment. However, the rigid stromal microenvironment and low immunogenicity of breast tumors strongly reduce sensitivity to immunotherapy. To sensitize patients to breast cancer immunotherapy, hyaluronic acid-modified zinc peroxide-iron nanocomposites (Fe-ZnO@HA, abbreviated FZOH) were synthesized to remodel the stromal microenvironment and increase tumor immunogenicity.

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To address the common drawbacks of current disinfection robots, which include the potential for secondary environmental pollution, disinfection dead corners, and low efficiency, in this paper, an autonomous mobile combination disinfection system is proposed. The system utilizes ultraviolet (UV) radiation and a low-concentration hydrogen peroxide aerosol to kill pathogens. It comprises three parts: a human-computer interface, a mobile robot, and disinfection equipment.

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Background: As a member of tumor, Skin cutaneous melanoma (SKCM) poses a serious threat to people's health because of its strong malignancy. Unfortunately, effective treatment methods for SKCM remain lacking. FANCI plays a vital role in the occurrence and metastasis of various tumor types.

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Psoriasis, an inflammatory autoimmune skin disease, is characterized by scaly white or erythematous plaques, which severely influence patients' quality of life and social activities. Mesenchymal stem cells derived from the human umbilical cord (UCMSCs) represent a promising therapeutic approach for psoriasis because of its unique superiority in ethical agreeableness, abundant source, high proliferation capacity, and immunosuppression. Although cryopreservation provided multiple benefits to the cell therapy, it also greatly compromised clinical benefits of MSCs due to impaired cell functions.

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Psoriasis is a systemic immune-mediated disease associated with an increased risk of comorbidities, such as psoriatic arthritis, cardiovascular disease, metabolic syndrome, inflammatory bowel disease, psychiatric disorders, and malignancy. In recent years, with the advent of biological agents, the efficacy and safety of psoriasis treatments have dramatically improved. Presently, tumor necrosis factor-α inhibitors, interleukin-17 inhibitors, interleukin-12/23 inhibitors, and interleukin-23 inhibitors are approved to treat moderate-to-severe psoriasis.

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Butterfly optimization algorithm (BOA) is a new swarm intelligence algorithm mimicking the behaviors of butterflies. However, there is still much room for improvement. In order to enhance the convergence speed and accuracy of the BOA, we present an improved algorithm SCLBOA based on SIBOA, which incorporates a logical mapping and a Lévy flight mechanism.

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Psoriasis is a chronic, inflammatory skin disease, frequently associated with dyslipidemia. Lipid disturbance in psoriasis affects both circulatory system and cutaneous tissue. Epidermal Langerhans cells (LCs) are tissue-resident DCs that maintain skin immune surveillance and mediate various cutaneous disorders, including psoriasis.

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With the continuous improvement of people's economic level, running, as the most common sports, is not limited by sports venues and sports levels and deeply loved by people. However, during running, soft tissue resonates with the impact force, increasing the load on joints and tendons and potentially leading to sports injuries. The purpose of this article is to study the application of low-intensity laser in the treatment of muscle strain.

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Industrial control systems (ICS) are applied in many fields. Due to the development of cloud computing, artificial intelligence, and big data analysis inducing more cyberattacks, ICS always suffers from the risks. If the risks occur during system operations, corporate capital is endangered.

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Mesenchymal stem cells (MSCs) have shown great potential in treating autoimmune diseases due to their immunomodulatory capability, which has been verified in both animal experiments and clinical trials. Psoriasis is a chronic and remitting immune-related disease. Limited studies have demonstrated that MSCs might be an effective therapeutic approach for managing psoriasis, whose underlying mechanism remains to be elucidated.

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Psoriasis is a recurrent inflammatory skin disorder characterized by epidermal hyperplasia, which is primarily driven by IL-17A. The Hippo-YAP signaling pathway plays a vital role in cell survival and tissue growth, and its target gene, AREG, has been reported to promote the development of psoriasis. However, whether IL-17A promotes keratinocyte proliferation through regulating Hippo-YAP signaling has not been explored.

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Psoriasis is a common immune-mediated skin disease that involves T-cell-mediated immunity. Invariant natural killer T (NKT) cells are a unique lymphocyte subpopulation that share properties and express surface markers of both NK cells and T cells. Previous reports indicate that NKT cells regulate the development of various inflammatory diseases.

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Psoriasis is a complex long-lasting inflammatory skin disease with high prevalence and associated comorbidity. It is characterized by epidermal hyperplasia and dermal infiltration of immune cells. Here, we review the role of keratinocytes in the pathogenesis of psoriasis, focusing on factors relevant to genetics, cytokines and receptors, metabolism, cell signaling, transcription factors, non-coding RNAs, antimicrobial peptides, and proteins with other different functions.

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