PeerJ
·
2023
·
IF 2.7
Linlin Sun,Miao Ding,Fuhua Chen,Dingyu Zhu,Xinmiao Xie
Podocyte injury is a critical factor in the pathogenesis of diabeticnephropathy (DN). Emerging evidence has demonstrated that breviscapine (Bre) exerts a renoprotective effect on diabetic rats. However, the effects of Bre on regulating podocyte injury under high glucose (HG) conditions remain unclear. In this study, an experimental mouse model of DN was induced by intraperitoneal injections of streptozotocin (STZ) in vivo . The effects of Bre on podocyte injury were assessed using cell counting kit-8 (CCK-8) assay, TdT-mediated dUTPnick-endlabelling (TUNEL) staining, quantitative real-time PCR (qRT‒PCR) and western blot analysis. We found that renal function was significantly decreased in diabetic mice, and this effect was blocked by Bre treatment. Bre effectively increased podocyte viability and inhibited HG-induced cell apoptosis. Furthermore, Bre ameliorated HG-induced podocyte injury, as evidenced by decreased α-smooth muscle actin (α-SMA) expression and increased podocin and synaptopodin expression. Mechanistically, Bre inhibited HG-induced nuclear factorkappaB (NF-κB) signalling activation and subsequently decreased NLR family pyrin domain containing 3 (NLRP3) inflammasome activation, resulting in a decrease in pyroptosis. Pharmacological inhibition of NLRP3 decreased HG-induced podocyte injury, whereas the NLRP3 agonist abrogated the effects of Bre on inhibiting podocyte injury. In summary, these results demonstrate that Bre alleviates HG-induced podocyte injury and improves renal function in diabetic mice, at least in part by inhibiting NF-κB/NLRP3-mediated pyroptosis.
研究领域:
药理学
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肾病学
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分子生物学
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DOI
PubMed
高影响因子
PHYTOMEDICINE
·
2025
·
IF 8.3
Xue Yang,Jinni Yang,Anhui Wang,Yuan Zheng,Jiachun Lin,Ziwen Kong,Yuan Tian,Haijuan Dong,Zunjian Zhang,Rui Song
Background : Ulcerative colitis (UC) has demonstrated an escalating global incidence and prevalence, thereby posing substantial challenges to public health. Despite recent advancements in therapeutic interventions, the clinical management of UC remains suboptimal, underscoring the urgent need for novel treatment strategies. Saikosaponin A (SSa), a bioactive compound derived from the traditional Chinese herb Radix Bupleuri (RB), exhibits potent anti-inflammatory and immunomodulatory effects. However, its effects on UC and the underlying molecular mechanisms remain to be thoroughly explored. Purpose : This study aims to elucidate the underlying mechanisms of SSa in ameliorating UC and establish a pharmacological foundation for developing novel treatment modalities to address unmet clinical needs in UC treatment. Methods : The protective effects of SSa against DSS-induced acute colitis were evaluated in a 3% DSS-treated mouse model. Histological (H&E staining) and molecular analyses (RT-qPCR, ELISA, Western blotting, and flow cytometry) were performed to assess colonic tissue damage and inflammatory responses. Macrophage depletion via tail vein injection of clodronate liposomes confirmed the pivotal role of macrophages in UC pathogenesis and SSa's anti-inflammatory effects. The inhibitory effects of SSa on NLRP3 inflammasome activation were analyzed in vivo and in LPS/ATP-stimulated bone marrow-derived macrophages (BMDMs) using RT-qPCR, ELISA, and Western blotting. Bioinformatics analysis, targeted LC-MS/MS, and molecular docking were employed to identify potential molecular targets and mechanisms of SSa. Drug affinity responsive target stability (DARTS), cellular thermal shift assay (CETSA), and CH25H siRNA knockdown assays were used to validate CH25H as the direct target of SSa. Results : SSa effectively attenuated DSS-induced colitis in mice by alleviating colonic inflammation, preserving intestinal barrier integrity, reducing LPS translocation, and mitigating systemic organ injury in the liver and spleen. The inflammatory response of macrophages and the production of IL-1β were identified as key pathogenic components in colitis, and the clearance of macrophages significantly ameliorated colitis progression while SSa administration post-macrophage clearance did not further alter the disease phenotype. Mechanistically, SSa inhibited the NLRP3 inflammasome activation-mediated IL-1β secretion in macrophages. The sterol metabolism played a crucial role in the activation of the NLRP3 inflammasome. SSa also restored the disturbed sterol homeostasis in the colon under inflammatory conditions, especially promoted the synthesis of 25-hydroxycholesterol (25-OHC). Further investigation revealed that SSa primarily exerts its therapeutic effects by directly targeting cholesterol 25-hydroxylase (CH25H), which promotes the production of 25-OHC and inhibits macrophage NLRP3 inflammasome activation. Conclusion : This pioneering study demonstrated the therapeutic effect of SSa on DSS-induced colitis by targeting CH25H to enhance 25-OHC biosynthesis, which subsequently inhibited NLRP3 inflammasome activation in IL-1β-producing macrophages. These findings reveal a novel mechanism of SSa in UC treatment through cholesterol metabolism-regulated cascade immune modulation, providing strong pharmacological support for its development as a potential UC therapy.
研究领域:
免疫学
·
药理学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
EXPERIMENTAL NEUROLOGY
·
2024
·
IF 4.6
Tingwang Guo,Gang Chen,Lin Yang,Jia Deng,Yun Pan
In intracerebral hemorrhage (ICH), the mechanical brain injury is a considerable and indispensable factor determining the neurological functions and poor outcomes. Previous studies indicate the mechanically gated ion channel-Piezo1 can transduce mechanical effects following ICH. Isoquercitrin (ISQ) is a well-studied ion channel inhibitor. Furthermore, whether the following Piezo1-mediated neurological impairment can be ameliorated by ISQ remains unclear. Herein, we constructed the hydrostatic pressure model and ICH rat model. Firstly, we found that Piezo1 agonists Yoda1 and Jedi1 facilitated extracellular calcium influx dramatically, but ISQ could depress intracellular Ca 2+ overload under hydrostatic pressure in primary neurons. Then we detected the expression profile of Piezo1, NLRP3 and NF-κB p-p65 after ICH, and found that the expression of Piezo1 was much earlier than NLRP3 and NF-κB p-p65. Furthermore, by western blot and immunofluorescence, ISQ decreased the expression of Piezo1 and NLRP3 dramatically like GsMTx4, but Nigericin as a NLRP3 agonist failed to affect Piezo1. Besides, both ISQ and interfering Piezo1 suppressed the upregulated caspase-1, NF-κB p-p65, p-IκBα, Tunel-positive cells and inflammatory factors (IL-1β, IL-6 and TNF-α) in ICH. At last, the hydrostatic pressure or hematoma induced disturbed neural viability, disordered neural cytomorphology, and increased neurobehavioral and cognitive deficits, but they were improved by ISQ and GsMTx4 strongly. Therefore, ISQ could alleviate neurological injuries induced by Piezo1 via NLRP3 pathway. These observations indicated that Piezos might be the new therapeutic targets, and blocking Piezos/NLRP3 pathway by ISQ could be an auspicious strategy for the treatment of ICH.
研究领域:
神经科学
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药理学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
CARDIOVASCULAR DRUGS AND THERAPY
·
2024
·
IF 3.1
Ye Bozhi,Cai Xueli,Liang Xiaohe,Chen Yunxuan,Dai Shanshan,Huang Zhuqi,Huang Weijian,Zhang Lei,Wang Zixuan,Xing Jincheng,Lai Xianhui,Huang Zhouqing,Jia Zhuyin
Purpose Inflammatory responses induced by NLRP3 inflammasome contribute to the progression of atherosclerosis. This study seeks to investigate the effect of emodin on the NLRP3 inflammasome in atherogenesis and to probe the underlying mechanism. Methods ApoE-knockout (ApoE −/− ) mice were treated with a high-fat diet (HFD) for 12 weeks and intragastrically with emodin for 6 weeks. Human mononuclear cell line THP-1 was pretreated with emodin or signaling pathway inhibitors and induced into macrophages using phorbol 12-myristate 13-acetate (PMA) for 48 h. The NLRP3-mediated inflammatory response was studied both in vivo and in vitro. The level of the inflammation was detected by western blot, real-time PCR analysis, and ELISA. Results Emodin attenuated atherosclerotic lesions in HFD-treated ApoE −/− mice. Emodin dramatically decreased the expression of NLRP3, GSDMD, IL-1β, and IL-18 in HFD-treated ApoE −/− mice and PMA-induced macrophages. Moreover, emodin significantly hindered the activation of nuclear factor kappa-B (NF-κB) by inhibiting the formation of the TLR4/MyD88 complex in PMA-induced macrophages. Conclusion Our data demonstrate that emodin can inhibit the development of atherosclerotic plaques by alleviating NLRP3/GSDMD-induced inflammation through repressing the TLR4/MyD88/NF-κB signaling pathway in macrophages. This finding suggests that emodin can be a potential candidate for the treatment of atherosclerosis.
研究领域:
免疫学
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心血管疾病
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药理学
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DOI
PubMed
高影响因子
NEUROCHEMICAL RESEARCH
·
2021
·Vol. 47
·期 3
·713-722
·
IF 3.996
Zhang Haiju,Yu Shiqian,Xia Liping,Peng Xia,Wang Shun,Yao Baozhen
Epilepsy (SE) is a common and serious neurological disease. NOD-like receptor family pyrin domain-containing 3 (NLRP3) inflammasome participates in the pathogenesis of SE, while its underlying mechanism is still unclear. Here, we attempted to explore the mechanism of action of NLRP3 inflammasome in SE. SE mouse model was constructed by administration of kainic acid (KA). Astrocytes were treated with KA to mimic SE cell model. MCC950 (NLRP3 inhibitor) and Z-YVAD-FMK (Caspase-1 inhibitor) were used to treat astrocytes to inhibit the activity of NLRP3 and Caspase-1. Nissl staining was performed to examine the morphology of neuron. Western blot, enzyme-linked immunosorbent assay and immunofluorescence staining were performed to assess protein expression. SE mouse model exhibited an increase of neuronal loss, and an up-regulation of Cleaved-Caspase-1, IL-1β and IL-18 in hippocampus. The levels of GFAP + ADK + cells were significantly increased in SE mice. MCC950 or Z-YVAD-FMK abolished these impacts conferred by KA in SE mice. Moreover, KA treatment enhanced the expression of NLRP3, Cleaved-Caspase-1, IL-1β and IL-18 in astrocytes, which was rescued by knockdown of NLRP3 or Caspase-1. Additionally, CREB, p-CREB, REST were up-regulated, and SP1 was down-regulated in the KA-treated SE mice and KA-treated astrocytes. Inhibition of NLRP3 or Caspase-1 rescued these proteins expression in KA-treated astrocytes. CREB or REST silencing reduced adenosine kinase (ADK) expression, while SP1 knockdown enhanced ADK expression in KA-treated astrocytes. In conclusion, NLRP3 inflammasome activation enhances ADK expression to accelerate SE in mice through regulating CREB/REST/SP1 signaling pathway. Thus, inhibition of NLRP3 inflammasome may be a treatment for SE.
研究领域:
神经科学
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免疫学
·
药理学
·
细胞生物学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL IMMUNOPHARMACOLOGY
·
2022
·
IF 5.714
Shanshan Wei,Zijun Xiao,Jie Huang,Zhenyu Peng,Bikui Zhang,Wenqun Li
Sepsis-induced cardiac injury leads to the high rate of mortality, the therapeutics for this disorder are limited. Disulfiram (DSF) is an FDA-approved treatment for chronic alcohol addiction, and its cardio-protection is gradually discovered in recent years. In present study, mice were injected with lipopolysaccharide (LPS, 15 mg/kg) to induce a septic cardiac injury model, and aimed to investigate the protective effect of DSF on sepsis-induced cardiac injury and the underlying mechanisms. Results showed that DSF treatment alleviated the lowered left heart function and myocardial cell apoptosis induced by LPS. Moreover, we found that LPS increased myocardium lipid peroxidation, DNA damage and the activation of NLRP3 inflammasome, which were significantly reduced by DSF. These results suggested the protective role of DSF in LPS-induced cardiac injury, and the mechanism involved the inhibition on the oxidative stress and NLRP3 inflammasome activation. Given the potent cardiac protection effect of DSF, repurposing DSF in the clinic would represent a new strategy to protect and treat sepsis-induced cardiac injury.
研究领域:
药理学
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心脏病学
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传染病学
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产品关联
DOI
PubMed
高影响因子
BRITISH JOURNAL OF PHARMACOLOGY
·
2023
·
IF 7.3
Fangfang Wang,Meng Zhang,Meng Yuan,Zixuan Xia,Fengge Yang,Sihao Zhang,Tengyu Lin,Lianxiang Luo,Jinshan Tang,Youwei Zhang
Background and Purpose Chronic inflammation is pathogenic and contributes to human diseases, causing a significant threat to public health. The NLR family pyrin domain-containing protein 3 (NLRP3) is the best-characterized factor regulating inflammation. Therefore, targeting NLRP3 has the potential to treat inflammatory diseases and improve human health. Experimental Approach Lipopolysaccharide was used to induce inflammation in cell cultures. Lipopolysaccharide/ d -galactosamine and dextran sulfate sodium salt were used to induce acute liver inflammation and ulcerative colitis respectively in C57BL/6J mice. Western blotting, immunofluorescence, immunoprecipitation, quantitative PCR and enzyme-linked immunosorbent assay (ELISA) were used to evaluate the activation of the inflammatory response in cell cultures and in mice. Key Results JNUTS013, a novel sorbicillinoid compound recently synthesized by us, significantly inhibited inflammation both in cell cultures and in mouse models. Mechanistically, JNUTS013 induced proteasome-dependent degradation of NLRP3. Hence, it suppressed the formation of the NLRP3 inflammasome and the production of downstream inflammatory cytokines and chemokines. The inhibitory effect of JNUTS013 on NLRP3 protein expression was confirmed in mice. Importantly, JNUTS013 failed to ameliorate bowel inflammation in Nlrp3 -/- knockout mice, supporting NLRP3 as the biological target by which JNUTS013 inhibits inflammation. Further studies revealed critical chemical moieties of JNUTS013 required for inducing NLRP3 degradation. Conclusion and Implications This study identifies a novel compound JNUTS013 that inhibits inflammation through inducing NLRP3 protein degradation in vitro and in vivo , which not only supports the development of JNUTS013 as an anti-inflammation agent but also creates a new way for the treatment of inflammation by chemically inducing NLRP3 degradation. Graphical
研究领域:
药理学
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免疫学
·
炎症研究
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产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2023
·Vol. 13
·期 1
·1-13
·
IF 4.6
Li Shaocong,He Qi,Chen Baihao,Zeng Jiaxu,Dou Xiangyun,Pan Zhaofeng,Xiao Jiacong,Li Miao,Wang Fanchen,Chen Chuyi,Lin Yuewei,Wang Xintian,Wang Haibin,Chen Jianfa
Iron homeostasis plays an essential role in joint health, while iron overload can cause damage and death of cartilage cells. Cardamonin (CAR) is a substance found in the fruit of the chasteberry plant and has anti-inflammatory and anti-tumor activities. We first administered iron dextran (500 mg/kg) intraperitoneally to establish an iron overload mouse model and surgically induced osteoarthritis. The extent of OA and iron deposition were assessed using Micro-ct, Safranin-O/fast green staining, H&E staining, and Prussian Blue 10 weeks later. We administered primary chondrocytes with Ferric Ammonium Citrate (FAC) to evaluate the chondrocyte changes. Chondrocytes were identified in vitro by toluidine blue staining, and chondrocyte viability was evaluated by CCK-8. The rate of apoptosis was determined by Annexin V-FITC/PI assay. The mechanism of action of CAR was verified by adding the SIRT1 inhibitor EX527, and the expression of SIRT1 and MAPK signaling pathways was detected by Western blot. Iron overload also promoted chondrocyte apoptosis, a process that was reversed by CAR. In addition, CAR reduced NLRP3 inflammasome production via the SIRT1-MAPK pathway, and the SIRT1 inhibitor EX527 inhibited the treatment of OA by CAR.CAR inhibited cartilage degeneration induced by iron overload both in vivo and in vitro. Besides, our study showed that iron overload not only inhibited type II collagen expression but also induced MMP expression by catalyzing the generation of NLRP3 inflammasome. Our results suggest that CAR can treat KOA by promoting SIRT1 expression and inhibiting p38MAPK pathway expression to reduce the production of NLRP3 inflammasome vesicles.
研究领域:
医学
·
分子生物学
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DOI
PubMed
高影响因子
TOXICOLOGY AND APPLIED PHARMACOLOGY
·
2025
·
IF 3.4
Xiuhui Chen,Yutong Zheng,Xiaofeng Zhang,Anran Zheng,Junjun Huang,Guoliang Deng,Xuna Wu,Yuying Peng,Xiaoling Zhang,Renshan Chen,Qing Xiao,Weijun Ye
Aberrant activation of the NLRP3 inflammasome is critically involved in sepsis-induced acute lung injury (ALI), with inhibition of this pathway emerging as a promising therapeutic approach. This study identifies Dipyridamole, an FDA-approved drug, as a novel inhibitor of the NLRP3 inflammasome. Mechanistically, Dipyridamole suppresses mitochondrial ROS release and directly interacts with NEK7, thereby preventing its association with NLRP3 and impeding inflammasome complex assembly. In an LPS-induced sepsis model, Dipyridamole significantly ameliorated ALI, reduced inflammatory responses, and improved survival rates in model mice. Additionally, Dipyridamole effectively inhibited NLRP3 inflammasome activation in lung tissue. These findings position Dipyridamole as a potent NLRP3 inflammasome inhibitor with substantial therapeutic potential for managing sepsis-induced ALI.
研究领域:
免疫学
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药理学
·
病理学
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产品关联
DOI
PubMed
高影响因子
AMERICAN JOURNAL OF CHINESE MEDICINE
·
2025
·Vol. 53
·期 03
·909-930
·
IF 5.5
Ke Li,Ya-Jun Wang,Kun Wei,Wen-Lin Li,Yong-Bo Liu,Jun-Nan Hu,Wen-Guang Chang,Wen-Xuan Zhang,Long Chen,Wei Li
Diabetes mellitus (DM) is considered to be the most widespread epidemic worldwide, and diabetic nephropathy (DN) is one of the most serious diabetic complications. Its complex pathogenesis makes treatment of DN an ongoing medical challenge. Ginseng ( Panax ginseng . C. A Meyer) is a valuable medicinal herb with a long medicinal and culinary history. Ginsenoside Rg2 (Rg2), an important active component in ginseng, has effective inhibitory effects on lipogenesis and hepatic glucose production. However, the potential effect and mechanism of Rg2 on DN remain unclear. In this study, we investigated the effect of Rg2 on DN in high fat diet/streptozotocin (HFD/STZ)-induced type 2 diabetic mice and high glucose (HG)-induced human kidney 2 (HK-2) cells. The results demonstrated that Rg2 significantly improved the levels of FBG, dyslipidemia and impaired kidney function in DN mice. Additionally, Rg2 decreased the phosphorylation levels of IKKβ, IκBα, and NF-κB p65, inhibited the activation of NLRP3 inflammasomes (NLRP3, ASC, and Caspase 1), and restrained release of inflammatory factors (IL-18 and IL-1 β ) . In HG-induced HK-2 cells, Rg2 showed similar inhibitory effects on pyroptosis via NF-κB/NLRP3 signaling pathways. Moreover, the effect of Rg2 on inhibiting the activation of NF-κB/NLRP3 signaling pathways may have a relationship to reducing the overproduction of reactive oxygen species (ROS), which is further supported by the ROS inhibitor N-acetylcysteine (NAC). In conclusion, our findings clearly indicated that Rg2 could prevent the progress of DN by inhibiting the activation of pyroptosis-related NF-κB/NLRP3 signaling pathways in vivo and in vitro , suggesting that Rg2 may be a novel and promising therapeutic agent in the treatment of DN.
研究领域:
药理学
·
分子生物学
·
糖尿病研究
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产品关联
DOI
PubMed
高影响因子
FREE RADICAL BIOLOGY AND MEDICINE
·
2025
·
IF 8.2
Xiaomeng Ji,Jingquan Dong,Wenting Zhu,Shasha Zhang,Yaru Chen,Xiao Liu,Yan Cao,Panpan Zhao,Zibo Dong
Background Sepsis-associated encephalopathy (SAE) represents one of the most common neurological complications observed in sepsis patients, contributing to both increased mortality and long-term cognitive impairment. Microglial mitochondrial reactive oxygen species (mtROS) overproduction and NLR family pyrin domain-containing 3 (NLRP3) inflammasome activation were key pathological drivers of SAE. Although PIM-1, a serine/threonine kinase, was known to regulate both mtROS generation and NLRP3 signaling, its specific contribution to SAE remained poorly defined. Methods This study established a SAE mouse model using cecal ligation and puncture (CLP) surgery, and screened the differentially expressed gene PIM-1 through immunohistochemistry, GEO database analysis, and etc. An in vitro model was established using Lipopolysaccharide + Adenosine(LPS + ATP) Triphosphate stimulated Mouse Microglia (BV-2), and the regulation mechanism of PIM-1 was analyzed through siRNA interference, RNA-seq, and etc. Potential drug Urolithin B (UB) targeting PIM-1 inhibition was screened through molecular docking, and its inhibitory effect on PIM-1 and therapeutic potential in SAE were evaluated through thermal stability experiments, behavioral experiments, etc. Results PIM-1 was upregulated in SAE, which was associated with brain damage. PIM-1 knockdown suppressed microglial activation and reduced inflammatory cytokines release. Further investigation indicated that PIM-1 modulated mtROS generation and facilitated NLRP3 inflammasome activation. Notably, pharmacological inhibition of PIM-1 by UB alleviated SAE both in vivo and in vitro , resulting in improved neuronal damage and cognitive impairment. Conclusion PIM-1 played a critical role in SAE progression, potentially through its mediation of microglial activation and neuroinflammation via the mtROS/NLRP3 axis. Notably, pharmacological inhibition of PIM-1 with urolithin B significantly alleviated SAE.
研究领域:
神经免疫学
·
重症医学
·
分子神经生物学
·
炎症与感染
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转化神经科学
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药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TOXICOLOGY MECHANISMS AND METHODS
·
2025
·
IF 2.7
Min Li,Zhouli Yue,Menglin Wang,Yan Wang,Peng Xiao,Wei Yuan,Jiduo Shen,Yucheng Li
Crizotinib, a first-generation tyrosine kinase inhibitor, demonstrates excellent clinical efficacy in treating non-small cell lung cancer (NSCLC). However, its clinical application is often limited by severe hepatotoxicity, the underlying mechanisms of which remain poorly understood. This study aimed to investigate the molecular mechanisms of crizotinib-induced hepatotoxicity in mice using transcriptomic analysis. Male ICR mice were orally administered crizotinib at doses of 100, 200, and 300 mg/kg for 7 consecutive days. Hepatotoxicity was assessed by measuring serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels, along with histopathological evaluation via hematoxylin and eosin (H&E) staining. Transcriptomic and bioinformatics analyses of liver tissues were conducted to identify potential toxicological pathways. Oxidative stress markers were quantified using biochemical assay kits. Hepatic macrophage activation was examined by F4/80 immunostaining, and protein expression levels were analyzed by western blotting. Crizotinib administration resulted in dose-dependent liver injury, as indicated by elevated serum ALT and AST levels, body weight loss, and histological abnormalities. Transcriptomic profiling revealed significant enrichment of oxidative stress-related pathways, with protein–protein interaction (PPI) analysis identifying Jun as a key hub gene. Crizotinib significantly increased hepatic reactive oxygen species (ROS), malondialdehyde (MDA), and oxidized glutathione (GSSG) levels, while reducing reduced glutathione (GSH) levels and the GSH/GSSG ratio. Additionally, crizotinib significantly upregulated Bax and downregulated Bcl-2 expression, promoted macrophage infiltration, and increased the expression of JNK and NLRP3 proteins. These findings suggest that crizotinib-induced hepatotoxicity may be mediated by ROS-induced activation of the JNK/NLRP3 signaling pathway, which subsequently promotes hepatic inflammation and apoptosis.
研究领域:
药理学
·
毒理学
·
分子生物学
·
肿瘤学
·
生物信息学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）