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Yang H, Qian H, Liu B, Wu Y, Cheng Y, Zheng X, Li X, Yang G, He T, Li S, Shen F. Triptolide dose-dependently improves LPS-induced alveolar hypercoagulation and fibrinolysis inhibition through NF-κB inactivation in ARDS mice. Biomed Pharmacother 2021; 139:111569. [PMID: 34243622 DOI: 10.1016/j.biopha.2021.111569] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/20/2021] [Accepted: 03/31/2021] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Alveolar hypercoagulation and fibrinolysis inhibition were associated with the refractory hypoxemia and the high mortality in patient with acute respiratory distress syndrome (ARDS), and NF-κB pathway was confirmed to contribute to the process. Triptolide (TP) significantly inhibited NF-κB pathway and thus depressed accessive inflammatory response in ARDS. We speculate that TP could improve alveolar hypercoagulation and fibrinolytic inhibition in LPS-induced ARDS via NF-κB inactivation. PURPOSE The aim of this experiment was to explore the efficacy and potential mechanism of TP on alveolar hypercoagulation and fibrinolysis inhibition in LPS-induced ARDS in mice. METHODS 50 μl of LPS (5 mg/ml) was inhalationally given to C57BL/6 mice to set up ARDS model. Male mice were randomly accepted with LPS, LPS + TP (1 μg/kg, 10 μg/kg, 50 μg/kg respectively), or with NEMO Binding domain peptide (NBD), an inhibitor of NF-κB. TP (1 μg/kg, 10 μg/kg, 50 μg/kg) were intraperitoneally injected or 10 μg/50 μl of NBD solution were inhaled 30 min before LPS inhalation. A same volume of normal saline (NS) substituted for TP in mice in control. The endpoint of experiment was at 8 hours after LPS stimulation. Pulmonary tissues were taken for hematoxylin-eosin (HE) staining, wet / dry ratio and for lung injury scores (LIS). Tissue factor (TF) and plasminogen activator inhibitor (PAI)-1 in lung tissue were detected by Western-blotting and by quantitative Real-time PCR(qPCR) respectively. Concentrations of TF, PAI-1, thrombin-antithrombin complex (TAT), procollagen peptide type Ⅲ (PⅢP) and activated protein C (APC) in bronchoalveolar lavage fluid (BALF) were measured by ELISA. NF-κB activation and p65-DNA binding activity in pulmonary tissue were simultaneously determined. RESULTS LPS stimulation resulted in pulmonary edema, neutrophils infiltration, obvious alveolar collapse, interstitial congestion, with high LIS, which were all dose-dependently ameliorated by Triptolide. LPS also dramatically promoted the expressions of TF and PAI-1 either in mRNA or in protein in lung tissue, and significantly stimulated the secretions of TF, PAI-1, TAT, PⅢP but inhibited APC production in BALF, which were all reversed by triptolide treatment in dose-dependent manner. TP dose-dependently inhibited the activation of NF-κB pathway induced by LPS, indicated by the changes of phosphorylations of p65 (p-p65), p-IKKα/β and p-IκBα, and weakened p65-DNA binding activity. TP and NBD had same efficacies either on alveolar hypercoagulation and fibrinolysis inhibition or on NF-κB signalling pathway in ARDS mice. CONCLUSIONS TP dose-dependently improves alveolar hypercoagulation and fibrinolysis inhibition in ARDS mice through inhibiting NF-κB signaling pathway. Our data demonstrate that TP is expected to be an effective selection in ARDS.
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Affiliation(s)
- Huilin Yang
- Department of Intensive Care Unit, Guizhou Medical University Affiliated Hospital, Guiyang 550001, China.
| | - Hong Qian
- Department of Intensive Care Unit, Guizhou Medical University Affiliated Hospital, Guiyang 550001, China.
| | - Bo Liu
- Department of Intensive Care Unit, Guizhou Medical University Affiliated Hospital, Guiyang 550001, China.
| | - Yanqi Wu
- Department of Intensive Care Unit, Guizhou Medical University Affiliated Hospital, Guiyang 550001, China.
| | - Yumei Cheng
- Department of Intensive Care Unit, Guizhou Medical University Affiliated Hospital, Guiyang 550001, China.
| | - Xinghao Zheng
- Department of Intensive Care Unit, Guizhou Medical University Affiliated Hospital, Guiyang 550001, China.
| | - Xiang Li
- Department of Intensive Care Unit, Guizhou Medical University Affiliated Hospital, Guiyang 550001, China.
| | - Guixia Yang
- Department of Intensive Care Unit, Guizhou Medical University Affiliated Hospital, Guiyang 550001, China.
| | - Tianhui He
- Department of Intensive Care Unit, Guizhou Medical University Affiliated Hospital, Guiyang 550001, China.
| | - Shuwen Li
- Department of Intensive Care Unit, Guizhou Medical University Affiliated Hospital, Guiyang 550001, China.
| | - Feng Shen
- Department of Intensive Care Unit, Guizhou Medical University Affiliated Hospital, Guiyang 550001, China.
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Liu Z, Bian M, Ma QQ, Zhang Z, Du HH, Wei CX. Design and Synthesis of New Benzo[d]oxazole-Based Derivatives and Their Neuroprotective Effects on β-Amyloid-Induced PC12 Cells. Molecules 2020; 25:E5391. [PMID: 33218007 PMCID: PMC7698601 DOI: 10.3390/molecules25225391] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 11/15/2020] [Accepted: 11/16/2020] [Indexed: 12/14/2022] Open
Abstract
A series of novel synthetic substituted benzo[d]oxazole-based derivatives (5a-5v) exerted neuroprotective effects on β-amyloid (Aβ)-induced PC12 cells as a potential approach for the treatment of Alzheimer's disease (AD). In vitro studies show that most of the synthesized compounds were potent in reducing the neurotoxicity of Aβ25-35-induced PC12 cells at 5 μg/mL. We found that compound 5c was non-neurotoxic at 30 μg/mL and significantly increased the viability of Aβ25-35-induced PC12 cells at 1.25, 2.5 and 5 μg/mL. Western blot analysis showed that compound 5c promoted the phosphorylation of Akt and glycogen synthase kinase (GSK-3β) and decreased the expression of nuclear factor-κB (NF-κB) in Aβ25-35-induced PC12 cells. In addition, our findings demonstrated that compound 5c protected PC12 cells from Aβ25-35-induced apoptosis and reduced the hyperphosphorylation of tau protein, and decreased the expression of receptor for AGE (RAGE), β-site amyloid precursor protein (APP)-cleaving enzyme 1 (BACE1), inducible nitric oxide synthase (iNOS) and Bcl-2-associated X protein/B-cell lymphoma 2 (Bax/Bcl-2) via Akt/GSK-3β/NF-κB signaling pathway. In vivo studies suggest that compound 5c shows less toxicity than donepezil in the heart and nervous system of zebrafish.
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Affiliation(s)
- Zheng Liu
- Medicinal Chemistry and Pharmacology Institute, Inner Mongolia University for the Nationalities, Tongliao 028000, China; (Z.L.); (M.B.); (Q.-Q.M.)
| | - Ming Bian
- Medicinal Chemistry and Pharmacology Institute, Inner Mongolia University for the Nationalities, Tongliao 028000, China; (Z.L.); (M.B.); (Q.-Q.M.)
- Inner Mongolia Key Laboratory of Mongolian Medicine Pharmacology for Cardio-Cerebral Vascular System, Tongliao 028000, China
| | - Qian-Qian Ma
- Medicinal Chemistry and Pharmacology Institute, Inner Mongolia University for the Nationalities, Tongliao 028000, China; (Z.L.); (M.B.); (Q.-Q.M.)
- Inner Mongolia Key Laboratory of Mongolian Medicine Pharmacology for Cardio-Cerebral Vascular System, Tongliao 028000, China
| | - Zhuo Zhang
- College of Pharmaceutical Sciences, Yanbian University, Yanji 133022, China;
| | - Huan-Huan Du
- Medicinal Chemistry and Pharmacology Institute, Inner Mongolia University for the Nationalities, Tongliao 028000, China; (Z.L.); (M.B.); (Q.-Q.M.)
- Inner Mongolia Key Laboratory of Mongolian Medicine Pharmacology for Cardio-Cerebral Vascular System, Tongliao 028000, China
| | - Cheng-Xi Wei
- Medicinal Chemistry and Pharmacology Institute, Inner Mongolia University for the Nationalities, Tongliao 028000, China; (Z.L.); (M.B.); (Q.-Q.M.)
- Inner Mongolia Key Laboratory of Mongolian Medicine Pharmacology for Cardio-Cerebral Vascular System, Tongliao 028000, China
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Luo Q, Li D, Bao B, Wan X, Pan B, Tu J, Wang H, Ouyang Y, Chen Z, Yin X. NEMO-binding domain peptides alleviate perihematomal inflammation injury after experimental intracerebral hemorrhage. Neuroscience 2019; 409:43-57. [PMID: 31047976 DOI: 10.1016/j.neuroscience.2019.04.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 04/16/2019] [Accepted: 04/17/2019] [Indexed: 01/02/2023]
Abstract
Inflammation aggravates the lethal consequences of intracerebral hemorrhage. Recently, many studies have found that nuclear factor-κB (NF-κB) is a crucial transcription factor that initiates inflammation in the perihematomal region of ICH. NF-κB essential modulator (NEMO)-binding domain (NBD) peptide, a cell-permeable peptide spanning the NBD of IKKα or IKKβ, functions as a highly specific inhibitor of NF-κB. This peptide can negatively regulate the NF-κB pathway. The present study aimed to explore the effects and underlying pathomechanisms of NBD peptides after ICH. Striatum infusion of whole blood or saline was performed on C57BL/6 mice (n = 198). Experimental animals were administered NBD or control (mutated) peptides 2 h before or after ICH by intracerebroventricular injection (icv.). NBD peptides significantly inhibited edema formation, ameliorated the neurological deficits, markedly reduced IκBα and p65 phosphorylation, blocked nuclear translocation of p65, and upregulated IκBα expression by NF-κB after ICH induction. Using an in vitro hemin toxicity model, we investigated the effects of NBD peptides on microglial inflammation. We found that NBD peptides suppressed microglia inflammation and lowered the expression of TNF-α and IL-1β in both in vivo and in vitro experiments. Further experiments were performed in mice and cultured microglia, which treated with NBD peptides in the presence of p65 siRNA confirmed that the specificity of NBD peptides inhibit ICH-induced NF-κB activation. This study demonstrated that NBD peptides exert a neuroprotective role after ICH and might be a potential candidate for a novel therapeutic strategy for ICH.
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Affiliation(s)
- Qinghua Luo
- Department of Neurology, The Second Affiliated Hospital of Nanchang University, No. 1, Minde Road, Nanchang 330006, Jiangxi Province, China
| | - Dongling Li
- Department of Neurology, The Second Affiliated Hospital of Nanchang University, No. 1, Minde Road, Nanchang 330006, Jiangxi Province, China
| | - Bing Bao
- Department of Neurology, The Affiliated Hospital of Jiujiang University, No. 57, Xiangyang East Road, Jiujiang 332000, Jiangxi Province, China
| | - Xiaolin Wan
- Department of Neurology, The Second Affiliated Hospital of Nanchang University, No. 1, Minde Road, Nanchang 330006, Jiangxi Province, China
| | - Bingxing Pan
- Department of Neurology, The Second Affiliated Hospital of Nanchang University, No. 1, Minde Road, Nanchang 330006, Jiangxi Province, China; Laboratory of Fear and Anxiety Disorders, Institute of Life Science and School of Life Science, Nanchang University, No. 999, Xuefu Avenue, Nanchang 330031, Jiangxi Province, , China
| | - Jianglong Tu
- Department of Neurology, The Second Affiliated Hospital of Nanchang University, No. 1, Minde Road, Nanchang 330006, Jiangxi Province, China
| | - Han Wang
- Department of Neurology, The Affiliated Hospital of Jiujiang University, No. 57, Xiangyang East Road, Jiujiang 332000, Jiangxi Province, China; Department of Neurology, The Second Affiliated Hospital of Nanchang University, No. 1, Minde Road, Nanchang 330006, Jiangxi Province, China
| | - Yetong Ouyang
- Department of Neurology, The Affiliated Hospital of Jiujiang University, No. 57, Xiangyang East Road, Jiujiang 332000, Jiangxi Province, China; Department of Neurology, The Second Affiliated Hospital of Nanchang University, No. 1, Minde Road, Nanchang 330006, Jiangxi Province, China
| | - Zhiying Chen
- Department of Neurology, The Affiliated Hospital of Jiujiang University, No. 57, Xiangyang East Road, Jiujiang 332000, Jiangxi Province, China.
| | - Xiaoping Yin
- Department of Neurology, The Affiliated Hospital of Jiujiang University, No. 57, Xiangyang East Road, Jiujiang 332000, Jiangxi Province, China.
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Gurney LRI, Taggart J, Tong WC, Jones AT, Robson SC, Taggart MJ. Inhibition of Inflammatory Changes in Human Myometrial Cells by Cell Penetrating Peptide and Small Molecule Inhibitors of NFκB. Front Immunol 2018; 9:2966. [PMID: 30619324 PMCID: PMC6307458 DOI: 10.3389/fimmu.2018.02966] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 12/03/2018] [Indexed: 01/17/2023] Open
Abstract
Complications arising from Preterm Birth are the leading causes of neonatal death globally. Current therapeutic strategies to prevent Preterm Birth are yet to demonstrate success in terms of reducing this neonatal disease burden. Upregulation of intracellular inflammatory pathways in uterine cells, including those involving nuclear factor kappa-B (NFκB), have been causally linked to both human term and preterm labor, but the barrier presented by the cell membrane presents an obstacle to interventions aimed at dampening these inflammatory responses. Cell penetrating peptides (CPPs) are novel vectors that can traverse cell membranes without the need for recognition by cell surface receptors and offer the ability to deliver therapeutic cargo internal to cell membranes. Using a human uterine cell culture inflammatory model, this study aimed to test the effectiveness of CPP-cargo delivery to inhibit inflammatory responses, comparing this effect with a small molecule inhibitor (Sc514) that has a similar intracellular target of action within the NFκB pathway (the IKK complex). The CPP Penetratin, conjugated to rhodamine, was able to enter uterine cells within a 60 min timeframe as assessed by live confocal microscopy, this phenomena was not observed with the use of a rhodamine-conjugated inert control peptide (GC(GS)4). Penetratin CPP conjugated to an IKK-inhibitory peptide (Pen-NBD) demonstrated ability to inhibit both the IL1β-induced expression of the inflammatory protein COX2 and dampen the expression of a bespoke array of inflammatory genes. Truncation of the CPP vector rendered the CPP-cargo conjugate much less effective, demonstrating the importance of careful vector selection. The small molecule inhibitor Sc514 also demonstrated ability to inhibit COX2 protein responses and a broad down-regulatory effect on uterine cell inflammatory gene expression. These results support the further exploration of either CPP-based or small molecular treatment strategies to dampen gestational cell inflammatory responses in the context of preterm birth. The work underlines both the importance of careful selection of CPP vector-cargo combinations and basic testing over a broad time and concentration range to ensure effective responses. Further work should demonstrate the effectiveness of CPP-linked cargos to dampen alternative pathways of inflammation linked to Preterm Birth such as MAP Kinase or AP1.
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Affiliation(s)
- Leo R. I. Gurney
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Julie Taggart
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Wing-Chiu Tong
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Arwyn T. Jones
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, United Kingdom
| | - Stephen C. Robson
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Michael J. Taggart
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
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