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Li R, Liang Q, Yang Q, Dai W, Xiao Y, Pan H, Zhang Z, Liu L, Li X. Hexahydrocurcumin from Zingiberis rhizoma attenuates lipopolysaccharide-induced acute pneumonia through JAK1/STAT3 signaling pathway. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 122:155141. [PMID: 37837898 DOI: 10.1016/j.phymed.2023.155141] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 09/20/2023] [Accepted: 10/06/2023] [Indexed: 10/16/2023]
Abstract
BACKGROUND Pneumonia is one of the major causes of death after pathogens infection. Zingiberis rhizoma (GAN JIANG) is a herb that used in combination with other Chinese medicines to treat pathogen such as virus induced pneumonia. However, the affect of hexahydrocurcumin (HHC), a component from Zingiberis rhizoma, on pneumonia remains unknown. PURPOSE This study aims to explore the effects of HHC on lipopolysaccharide (LPS)-induced acute pneumonia, and to clarify the underlying mechanism. METHODS The pneumonia model of C57BL/6 mice was established by intratracheal injection of LPS to evaluate the therapeutic effect of HHC on lung injury and inflammation in vivo. RAW264.7 macrophages were utilized to illustrate the cellular mechanism of HHC in vitro. RESULTS HHC alleviated lung injury, ROS and inflammatory cytokine IL-6 production in pneumonia mice in vivo. Molecular docking results disclosed the binding of HHC to JAK1 protein. The study further showed that HHC suppressed the inflammatory cytokines such as IL-6, TNF-α, IL-1β gene expression, inhibited the phosphorylation of JAK1 but not JAK3, and the subsequent STAT3 phosphorylation in LPS-activated macrophages. HHC exhibited no effects on the protein levels of JAK1 and STAT3 in vitro. Consistently, HHC also attenuated the JAK1, STAT3 phosphorylation in pneumonia mice in vivo. CONCLUSION The results reveal that HHC attenuates pneumonia by targeted inhibition of JAK1/STAT3 signaling pathway. It indicates the novel role of HHC to treat pneumonia, and its potential applications for JAK inhibitor-treated diseases.
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Affiliation(s)
- Ruopeng Li
- Laboratory of Anti-inflammatory and Immunomodulatory Pharmacology, Innovation Program of Drug Research on Inflammatory and Immune Diseases, NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Qinghe Liang
- Laboratory of Anti-inflammatory and Immunomodulatory Pharmacology, Innovation Program of Drug Research on Inflammatory and Immune Diseases, NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Qin Yang
- Laboratory of Anti-inflammatory and Immunomodulatory Pharmacology, Innovation Program of Drug Research on Inflammatory and Immune Diseases, NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Wenqi Dai
- Laboratory of Anti-inflammatory and Immunomodulatory Pharmacology, Innovation Program of Drug Research on Inflammatory and Immune Diseases, NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Yao Xiao
- State Key Laboratory of Traditional Chinese Medicine Syndrome, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Hudan Pan
- State Key Laboratory of Traditional Chinese Medicine Syndrome, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Zhongde Zhang
- State Key Laboratory of Traditional Chinese Medicine Syndrome, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Liang Liu
- State Key Laboratory of Traditional Chinese Medicine Syndrome, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.
| | - Xiaojuan Li
- Laboratory of Anti-inflammatory and Immunomodulatory Pharmacology, Innovation Program of Drug Research on Inflammatory and Immune Diseases, NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China.
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Li G, Hu C, Liu Y, Lin H. Ligustilide, a novel SIRT1 agonist, alleviates lipopolysaccharide-induced acute lung injury through deacetylation of NICD. Int Immunopharmacol 2023; 121:110486. [PMID: 37327514 DOI: 10.1016/j.intimp.2023.110486] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 06/09/2023] [Accepted: 06/09/2023] [Indexed: 06/18/2023]
Abstract
Development and progression of sepsis-induced acute lung injury (ALI) involve apoptosis and oxidative stress in lung epithelial cells. Ligustilide (LIG) is one of the main bioactive constituents derived from the Angelica sinensis. As a novel SIRT1 agonist, LIG owns powerful anti-inflammatory and antioxidative properties, exerting remarkable therapeutic effects on cancers, neurological disorders, and diabetes mellitus. However, whether LIG could protect against lipopolysaccharide (LPS)-induced ALI by activating SIRT1 remains unclear. Mice underwent intratracheal LPS injection to mimic sepsis-induced ALI while MLE-12 cells were treated with LPS for 6 h to establish an in vitro ALI model. At the same time, mice or MLE-12 cells were treated with different doses of LIG to access its pharmacological effect. The results demonstrated that LIG pretreatment could improve LPS-induced pulmonary dysfunction and pathological injury, apart from increasing 7-day survival rate. In addition, LIG pretreatment also decreased inflammation, oxidative stress and apoptosis during LPS-induced ALI. Mechanically, LPS stimulation decreased the expression and activity of SIRT1 but increased the expression of Notch1 and NICD. And LIG could also enhance the interaction between SIRT1 and NICD, thus deacetylating NICD. In vitro experiments also unveiled that EX-527, a selective SIRT1 inhibitor, could abolish LIG-elicited protection in LPS-treated MLE-12 cells. And in SIRT1 knockout mice with ALI, LIG pretreatment also lost its effects on inflammation, apoptosis, and oxidative stress during ALI.
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Affiliation(s)
- Guang Li
- Department of Critical Care Medicine, Renmin Hospital, Wuhan University, Wuhan, Hubei Province, China
| | - Chunxiao Hu
- Department of Transplant Anesthesiology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
| | - Yan Liu
- Department of Thoracic Surgery, Renmin Hospital, Wuhan University, Wuhan, Hubei Province, China
| | - Huiqing Lin
- Department of Thoracic Surgery, Renmin Hospital, Wuhan University, Wuhan, Hubei Province, China.
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Zhang J, Sun Y, Sun C, Shang D. The antimicrobial peptide LK2(6)A(L) exhibits anti-inflammatory activity by binding to the myeloid differentiation 2 domain and protects against LPS-induced acute lung injury in mice. Bioorg Chem 2023; 132:106376. [PMID: 36706531 DOI: 10.1016/j.bioorg.2023.106376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 01/07/2023] [Accepted: 01/12/2023] [Indexed: 01/19/2023]
Abstract
Acute lung injury (ALI) is a life-threatening disease that is generally attributable to an uncontrolled inflammatory response in the lung, but there is a lack of effective treatments. At present, regulating the inflammatory response has become an important strategy for treating ALI. In the present study, LK2(6)A(L), a peptide derived from the natural antimicrobial peptide temporin-1CEa, inhibited lipopolysaccharide (LPS)-induced expression of tumor necrosis factor alpha (TNF-α), interleukin-6 (IL-6), and NO in RAW264.7 cells. Herein, the anti-inflammatory mechanism of LK2(6)A(L) was investigated. The RNA-sequencing (RNA-seq) results showed that LK2(6)A(L) significantly inhibited the TLR4-mediated NF-κB and MAPK signaling pathways in LPS-induced RAW264.7 cells. The results of co-immunoprecipitation (Co-IP), pull-down experiment, confocal laser scanning microscopy, and surface plasmon resonance (SPR) suggested that MD2 was the direct target of LK2(6)A(L). Chemical inhibition of MD2 and its knockdown abolished the anti-inflammatory effect of LK2(6)A(L). Molecular dynamic simulation indicated that LK2(6)A(L) could bind to the active domain of the MD2 hydrophobic pocket via six hydrogen bonds. The truncated peptides were designed based on analysis of the molecular docking of LK2(6)A(L) to MD2. The truncated peptide IS-7 showed strong affinity to MD2 and a remarkable inhibitory effect on pro-inflammatory factors that was comparable to the effect of LK2(6)A(L). Finally, LK2(6)A(L) and IS-7 relieved inflammatory symptoms and lung tissue destruction in the ALI mouse model. Overall, our study suggested that LK2(6)A(L) showed promising anti-inflammatory activity by targeting MD2, and the amino acid domain 7-13 was an important area that binds with MD2 and also an anti-inflammatory active region. LK2(6)A(L) and IS-7 may be potential new treatments for ALI and other acute inflammatory diseases.
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Affiliation(s)
- Juan Zhang
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Yue Sun
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China
| | - Chengpeng Sun
- College of Pharmacy, Dalian Medical University, Dalian 116044, China
| | - Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China.
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Zhang M, Zhang J, Zhu QM, Zhao WY, Lv X, Yi J, Huo XK, Wang MJ, Sun CP. Inula japonica ameliorated the inflammation and oxidative stress in LPS-induced acute lung injury through the MAPK/NF-κB and Keap1/Nrf2 signalling pathways. J Pharm Pharmacol 2023; 75:287-299. [PMID: 36617177 DOI: 10.1093/jpp/rgac084] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 10/15/2022] [Indexed: 01/09/2023]
Abstract
OBJECTIVES To investigate the protective effect and underlying mechanism of Inula japonica (TEIJ) in the treatment of acute lung injury (ALI). METHODS Protective effects of TEIJ in the inflammation and oxidative stress were studied in lipopolysaccharide (LPS)-induced ALI mice. Meanwhile, Western blot and real-time qPCR were carried out to investigate the underlying mechanism of TEIJ for ALI as well as immunohistochemistry. KEY FINDINGS TEIJ significantly alleviated the course of ALI via suppressing the interstitial infiltrated inflammatory cells, the increase of inflammatory factors and the decrease of anti-oxidative factors. TEIJ inactivated the MAPK/NF-κB signalling pathway to suppress the transcription of its downstream target genes, such as TNF-α, IL-6, etc. Meanwhile, TEIJ activated the Keap1/Nrf2 signalling pathway to regulate expression levels of Nrf2 and its target proteins. The results of LC-QTOF-MS/MS indicated potential active constituents of I. japonica, terpenoids and flavonoids. Additionally, terpenoids and flavonoids synergistically alleviated LPS-induced ALI depending on MAPK/NF-κB and Keap1/Nrf2 signalling pathways. CONCLUSION I. japonica could be considered a potential agent to treat ALI via regulating the MAPK/NF-κB and Keap1/Nrf2 signalling pathways.
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Affiliation(s)
- Min Zhang
- College of Pharmacy, College (Institute) of Integrative Medicine, Dalian Medical University, Dalian, China.,Second Affiliated Hospital, Dalian Medical University, Dalian, China
| | - Juan Zhang
- College of Pharmacy, College (Institute) of Integrative Medicine, Dalian Medical University, Dalian, China.,School of Pharmaceutical Sciences, Health Science Center, Shenzhen University, Shenzhen, China
| | - Qi-Meng Zhu
- College of Pharmacy, College (Institute) of Integrative Medicine, Dalian Medical University, Dalian, China
| | - Wen-Yu Zhao
- College of Pharmacy, College (Institute) of Integrative Medicine, Dalian Medical University, Dalian, China
| | - Xia Lv
- College of Pharmacy, College (Institute) of Integrative Medicine, Dalian Medical University, Dalian, China
| | - Jing Yi
- College of Pharmacy, College (Institute) of Integrative Medicine, Dalian Medical University, Dalian, China
| | - Xiao-Kui Huo
- College of Pharmacy, College (Institute) of Integrative Medicine, Dalian Medical University, Dalian, China
| | - Mi-Jia Wang
- Second Affiliated Hospital, Dalian Medical University, Dalian, China
| | - Cheng-Peng Sun
- College of Pharmacy, College (Institute) of Integrative Medicine, Dalian Medical University, Dalian, China
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Zhang J, Zhang M, Zhang WH, Zhu QM, Huo XK, Sun CP, Ma XC, Xiao HT. Total flavonoids of Inula japonica alleviated the inflammatory response and oxidative stress in LPS-induced acute lung injury via inhibiting the sEH activity: Insights from lipid metabolomics. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2022; 107:154380. [PMID: 36150346 DOI: 10.1016/j.phymed.2022.154380] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 07/04/2022] [Accepted: 08/02/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Acute lung injury (ALI) is a severe respiratory disease characterized by diffuse lung interstitial and respiratory distress and pulmonary edema with a mortality rate of 35%-40%. Inula japonica Thunb., known as "Xuan Fu Hua" in Chinese, is a traditional Chinese medicine Inulae Flos to use for relieving cough, eliminating expectorant, and preventing bacterial infections in the clinic, and possesses an anti-pulmonary fibrosis effect. However, the effect and action mechanism of I. japonica on ALI is still unclear. PURPOSE This study aimed to investigate the protective effect and underlying mechanism of total flavonoids of I. japonica (TFIJ) in the treatment of ALI. STUDY DESIGN AND METHODS A mouse ALI model was established through administration of LPS by the intratracheal instillation. Protective effects of TFIJ in the inflammation and oxidative stress were studied in LPS-induced ALI mice based on inflammatory and oxidative stress factors, including MDA, MPO, SOD, and TNF-α. Lipid metabolomics, bioinformatics, Western blot, quantitative real-time PCR, and immunohistochemistry were performed to reveal the potential mechanism of TFIJ in the treatment of ALI. RESULTS TFIJ significantly alleviated the interstitial infiltration of inflammatory cells and the collapse of the alveoli in LPS-induced ALI mice. Lipid metabolomics demonstrated that TFIJ could significantly affect the CYP2J/sEH-mediated arachidonic acid metabolism, such as 11,12-EET, 14,15-EET, 8,9-DHET, 11,12-DHET, and 14,15-DHET, revealing that sEH was the potential target of TFIJ, which was further supported by the recombinant sEH-mediated the substrate hydrolysis in vitro (IC50 = 1.18 μg/ml). Inhibition of sEH by TFIJ alleviated the inflammatory response and oxidative stress via the MAPK, NF-κB, and Nrf2 signaling pathways. CONCLUSION These results demonstrated that TFIJ could suppress the sEH activity to stabilize the level of EETs, allowing the alleviation of the pathological course of lung injury in LPS-treated mice, which suggested that TFIJ could serve as the potential agents in the treatment of ALI.
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Affiliation(s)
- Juan Zhang
- School of pharmaceutical Sciences, Health Science Center, Shenzhen University, Shenzhen, China; Second Affiliated Hospital, College of Pharmacy, Dalian Medical University, Dalian, China
| | - Min Zhang
- Second Affiliated Hospital, College of Pharmacy, Dalian Medical University, Dalian, China
| | - Wen-Hao Zhang
- Second Affiliated Hospital, College of Pharmacy, Dalian Medical University, Dalian, China
| | - Qi-Meng Zhu
- Second Affiliated Hospital, College of Pharmacy, Dalian Medical University, Dalian, China
| | - Xiao-Kui Huo
- Second Affiliated Hospital, College of Pharmacy, Dalian Medical University, Dalian, China
| | - Cheng-Peng Sun
- Second Affiliated Hospital, College of Pharmacy, Dalian Medical University, Dalian, China.
| | - Xiao-Chi Ma
- Second Affiliated Hospital, College of Pharmacy, Dalian Medical University, Dalian, China.
| | - Hai-Tao Xiao
- School of pharmaceutical Sciences, Health Science Center, Shenzhen University, Shenzhen, China.
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Fu Z, Wu X, Zheng F, Zhang Y. Activation of the AMPK-ULK1 pathway mediated protective autophagy by sevoflurane anesthesia restrains LPS-induced acute lung injury (ALI). Int Immunopharmacol 2022; 108:108869. [DOI: 10.1016/j.intimp.2022.108869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 05/05/2022] [Accepted: 05/12/2022] [Indexed: 11/05/2022]
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Juibari AD, Rezadoost MH, Soleimani M. The key role of Calpain in COVID-19 as a therapeutic strategy. Inflammopharmacology 2022; 30:1479-1491. [PMID: 35635676 PMCID: PMC9149670 DOI: 10.1007/s10787-022-01002-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 04/24/2022] [Indexed: 12/02/2022]
Abstract
COVID-19 is one of the viral diseases that has caused many deaths and financial losses to humans. Using the available information, this virus appears to activate the host cell-death mechanism through Calpain activation. Calpain inhibition can stop its downstream cascade reactions that cause cell death. Given the main roles of Calpain in the entry and pathogenicity of the SARS-CoV-2, its inhibition can be effective in controlling the COVID-19. This review describes how the virus activates Calpain by altering calcium flow. When Calpain was activated, the virus can enter the target cell. Subsequently, many complications of the disease, such as inflammation, cytokine storm and pulmonary fibrosis, are caused by virus-activated Calpain function. Calpain inhibitors appear to be a potential drug to control the disease and prevent death from COVID-19.
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Affiliation(s)
- Aref Doozandeh Juibari
- Department of Medical Biotechnology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | | | - Masoud Soleimani
- Department of Hematology, Faculty of Medical Sciences, Tarbiat Modarres University, Tehran, Iran
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Abstract
OBJECTIVE Interleukin-38 (IL-38), a new type of cytokine, is involved in processes such as tissue repair, inflammatory response, and immune response. However, its function in pneumonia caused by Pseudomonas aeruginosa (P. aeruginosa) is still unclear. METHODS In this study, we detected circulating IL-38 and cytokines such as IL-1β, IL-6, IL-17A, TNF-α, IL-8, and IL-10 in adults affected by early stage pneumonia caused by P. aeruginosa. Collected clinical data of these patients, such as the APACHE II score, levels of PCT, and oxygenation index when they entering the ICU. Using P. aeruginosa-induced pneumonia WT murine model to evaluate the effect of IL-38 on Treg differentiation, cell apoptosis, survival, tissue damage, inflammation, and bacterial removal. RESULTS In clinical research, although IL-38 is significantly increased during the early stages of clinical P. aeruginosa pneumonia, the concentration of IL-38 in the serum of patients who died with P. aeruginosa pneumonia was relatively lower than that of surviving patients. It reveals IL-38 may insufficiently secreted in patients who died with P. aeruginosa pneumonia. Besides, the serum IL-38 level of patients with P. aeruginosa pneumonia on the day of admission to the ICU showed significantly positive correlations with IL-10 and the PaO2/FiO2 ratio but negative correlations with IL-1β, IL-6, IL-8, IL-17, TNF-α, APACHE II score, and PCT In summary, IL-38 might be a molecule for adjuvant therapy in P. aeruginosa pneumonia. In experimental animal models, first recombinant IL-38 improved survival, whereas anti-IL-38 antibody reduced survival in the experimental pneumonia murine model. Secondly, IL-38 exposure reduced the inflammatory response, as suggested by the lung injury, and reduced cytokine levels (IL-1β, IL-6, IL- 17A, TNF-α, and IL-8, but not IL-10). It also increased bacterial clearance and reduced cell apoptosis in the lungs. Furthermore, IL-38 was shown to reduce TBK1 expression in vitro when naive CD4+ T lymphocytes were differentiated to Tregs and played a protective role in P. aeruginosa pneumonia. CONCLUSIONS To summarize, the above findings provide additional insights into the mechanism of IL-38 in the treatment of P. aeruginosa pneumonia.
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Jiang H, Wang S, Hou L, Huang JA, Su B. Resveratrol inhibits cell apoptosis by suppressing long noncoding RNA (lncRNA) XLOC_014869 during lipopolysaccharide-induced acute lung injury in rats. J Thorac Dis 2022; 13:6409-6426. [PMID: 34992821 PMCID: PMC8662516 DOI: 10.21037/jtd-21-1113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 10/28/2021] [Indexed: 12/29/2022]
Abstract
Background Acute lung injury (ALI) is a common clinical complication with a high mortality rate. Resveratrol (Res) has been shown to protect against ALI, but the role of long noncoding RNAs (lncRNAs) in this process is still unclear. Methods Male rats (n=20) aged 7–8 weeks were randomly divided into four groups: control, lipopolysaccharide (LPS), LPS + Res, and LPS + dexamethasone (Dexa). Intragastric administration of Res (0.5 mg/kg) or Dexa (1.5 mg/kg) was performed 1 h before intraperitoneal injection of LPS (5 mg/kg). Lung tissue, serum, and bronchoalveolar lavage fluid were sampled 6 h after LPS treatment for inflammatory factor detection, pathological detection, lncRNA sequencing and bioinformatical analysis, and TdT-mediated dUTP Nick-End Labeling. Quantitative real time polymerase chain reaction and western blotting were used to verify the sequencing results. LPS, Res, and RNA interference were used in rat alveolar epithelial cells experiments to confirm the protective of Res/lncRNA against ALI. Results Res pretreatment inhibited lung injury and the increase of inflammatory cytokines induced by LPS. The differentially expressed lncRNAs and mRNAs (P<0.05 and |fold change| >2) were mainly involved in the signaling pathway of immunity, infection, signaling molecules and interactions. Among the lncRNAs and mRNAs, 26 mRNAs and 23 lncRNAs had high levels in lungs treated with LPS but decreased with Res, and 17 mRNAs and 27 lncRNAs were at lower levels in lungs treated with LPS but increased with Res. lncRNA and adjacent mRNA analysis showed that lncRNAs XLOC_014869 and the adjacent gene Fos, and the possible downstream genes Jun and Faslg were increased by LPS, but these changes were attenuated by Res. Pretreatment with Res reduced LPS-induced lung tissue apoptosis. Similarly, Res treatment and knockdown of lncRNA XLOC_014869 reduced LPS-induced apoptosis and the levels of Fos, c-Jun, and Fas-L. Conclusions Res can inhibit the increase of lncRNAs XLOC_014869 caused by LPS stimulation and inhibit lung cell apoptosis. These effects may be due to lncRNA XLOC_014869 mediation of the pro-apoptotic factors (Fos, c-Jun, and Fas-L).
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Affiliation(s)
- Hongbin Jiang
- Department of Respiratory Medicine, the First Affiliated Hospital of Soochow University, Suzhou, China.,Department of Emergency, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Shanmei Wang
- Department of Emergency, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Likun Hou
- Department of Pathology, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Jian-An Huang
- Department of Respiratory Medicine, the First Affiliated Hospital of Soochow University, Suzhou, China.,Suzhou Key Laboratory for Respiratory Diseases, Suzhou, China.,Institute of Respiratory Diseases, Soochow University, Suzhou, China
| | - Bo Su
- Central Laboratory, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
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Liu W, Ou Y, Yang Y, Zhang X, Huang L, Wang X, Wu B, Huang M. Inhibitory Effect of Punicalagin on Inflammatory and Angiogenic Activation of Human Umbilical Vein Endothelial Cells. Front Pharmacol 2021; 12:727920. [PMID: 34867335 PMCID: PMC8636678 DOI: 10.3389/fphar.2021.727920] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Accepted: 10/20/2021] [Indexed: 12/17/2022] Open
Abstract
Punicalagin, a major ellagitannin isolated from pomegranate, is proved to have various pharmacological activities with an undefined therapy mechanism. The objective of this research was to demonstrate the effect of punicalagin on anti-inflammatory and angiogenic activation in human umbilical vein endothelial cells (HUVECs) and their potential mechanisms. Endothelial-leukocyte adhesion assay was applied to evaluate primary cultures of HUVECs activation following tumor necrosis factor alpha (TNF-α) treatment. The endothelial cell proliferation, migration, permeability and tube formation were assessed by EdU assay, wound migration assay, trans-endothelial electrical resistances (TEER) assay, and capillary-like tube formation assay, respectively. In addition, the expression of relevant proteins was assessed using Western blot analysis. We confirmed that punicalagin could reduce the adhesion of human monocyte cells to HUVECs in vitro and in vivo. Further, punicalagin decreased the expression of mRNA and proteins of ICAM-1 and VCAM-1 in HUVECs. Moreover, punicalagin inhibited permeability, proliferation, migration, and tube formation in VEGF-induced HUVECs, suppressed IKK-mediated activation of NF-κB signaling in TNF-α-induced endothelial cells, and inhibited vascular endothelial growth factor receptor 2 (VEGFR2) activation and downstream p-PAK1. Our findings indicated that punicalagin might have a protective effect on HUVECs activation, which suggested that punicalagin functions through an endothelial mediated mechanism for treating various disorders such as, cancer, rheumatoid arthritis, and cardiovascular disease.
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Affiliation(s)
- Wei Liu
- Shenzhen Stomatology Hospital (Pingshan) of Southern Medical University, Shenzhen, China
| | - Yanghui Ou
- Department of Digestive Medicine Center, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, China
| | - Yumeng Yang
- School of Stomatology, Southern Medical University, Guangzhou, China
| | - Xuemei Zhang
- Department of Nephrology, Center of Nephrology and Urology, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, China
| | - Liqi Huang
- Department of Nephrology, Center of Nephrology and Urology, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, China
| | - Xiaohua Wang
- Department of Nephrology, Center of Nephrology and Urology, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, China
| | - Buling Wu
- Shenzhen Stomatology Hospital (Pingshan) of Southern Medical University, Shenzhen, China.,School of Stomatology, Southern Medical University, Guangzhou, China
| | - Mingcheng Huang
- Department of Nephrology, Center of Nephrology and Urology, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, China
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Xie W, Huang W, Cai S, Chen H, Fu W, Chen Z, Liu Y. NF‑κB/IκBα signaling pathways are essential for resistance to heat stress‑induced ROS production in pulmonary microvascular endothelial cells. Mol Med Rep 2021; 24:814. [PMID: 34558646 PMCID: PMC8477608 DOI: 10.3892/mmr.2021.12454] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Accepted: 09/10/2021] [Indexed: 12/14/2022] Open
Abstract
The results of a previous study demonstrated that heat stress (HS) triggered oxidative stress, which in turn induced the apoptosis of epithelial cells. These results uncovered a novel mechanism underlying the activation of NF-κB in primary human umbilical vein endothelial cells. The present study aimed to further investigate the role of NF-κB/IκBα signaling pathways in the inhibition of HS-induced reactive oxygen species (ROS) generation and cytotoxicity in endothelial cells. The results of the present study demonstrated that HS triggered a significant amount of NF-κB and IκBα nuclear translocation without IκBα degradation in a time-dependent manner. Mutant constructs of IκBα phosphorylation sites (Ser32, Ser36) were employed in rat pulmonary microvascular endothelial cells (PMVECs). Cell Counting Kit-8 assays demonstrated that both the small interfering (si)RNA-mediated knockdown of p65 and IκBα mutant constructs significantly decreased cell viability and aggravated ROS accumulation in HS-induced rat PMVECs compared with the control. Additionally, western blot analysis revealed that p65 siRNA attenuated the protein expression of IκBα. However, IκBα mutant constructs failed to attenuate NF-κB activation and nuclear translocation, indicating that IκBα-independent pathways contributed to NF-κB activity and nucleus translocation in a time-dependent manner following HS. Collectively, the results of the present study suggested that the NF-κB/IκBα pathway was essential for resistance to HS-induced ROS production and cytotoxicity in rat PMVECs, and that it could be a potential therapeutic target to reduce the mortality and morbidity of heat stroke.
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Affiliation(s)
- Weidang Xie
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Wei Huang
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Shumin Cai
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Hui Chen
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Weijun Fu
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Zhongqing Chen
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Yanan Liu
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
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12
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Wang M, Zhong H, Zhang X, Huang X, Wang J, Li Z, Chen M, Xiao Z. EGCG promotes PRKCA expression to alleviate LPS-induced acute lung injury and inflammatory response. Sci Rep 2021; 11:11014. [PMID: 34040072 PMCID: PMC8154949 DOI: 10.1038/s41598-021-90398-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 05/10/2021] [Indexed: 12/11/2022] Open
Abstract
Acute lung injury (ALI), which could be induced by multiple factors such as lipopolysaccharide (LPS), refer to clinical symptoms of acute respiratory failure, commonly with high morbidity and mortality. Reportedly, active ingredients from green tea have anti-inflammatory and anticancer properties, including epigallocatechin-3-gallate (EGCG). In the present study, protein kinase C alpha (PRKCA) is involved in EGCG protection against LPS-induced inflammation and ALI. EGCG treatment attenuated LPS-stimulated ALI in mice as manifested as improved lung injury scores, decreased total cell amounts, neutrophil amounts and macrophage amounts, inhibited the activity of MPO, decreased wet-to-dry weight ratio of lung tissues, and inhibited release of inflammatory cytokines TNF-α, IL-1β, and IL-6. PRKCA mRNA and protein expression showed to be dramatically decreased by LPS treatment while reversed by EGCG treatment. Within LPS-stimulated ALI mice, PRKCA silencing further aggravated, while PRKCA overexpression attenuated LPS-stimulated inflammation and ALI through MAPK signaling pathway. PRKCA silencing attenuated EGCG protection. Within LPS-induced RAW 264.7 macrophages, EGCG could induce PRKCA expression. Single EGCG treatment or Lv-PRKCA infection attenuated LPS-induced increases in inflammatory factors; PRKCA silencing could reverse the suppressive effects of EGCG upon LPS-stimulated inflammatory factor release. In conclusion, EGCG pretreatment inhibits LPS-induced ALI in mice. The protective mechanism might be associated with the inhibitory effects of PRKCA on proinflammatory cytokine release via macrophages and MAPK signaling pathway.
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Affiliation(s)
- Mian Wang
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Xiangya RD 110, Changsha, 410078, China
- Department of Epidemiology and Health Statistics, School of Public Health, University of South China, Hengyang, 421001, China
| | - Hua Zhong
- Department of Cardiology, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Xian Zhang
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Xiangya RD 110, Changsha, 410078, China
| | - Xin Huang
- Department of Epidemiology and Health Statistics, Hunan Normal University, Changsha, 410006, China
| | - Jing Wang
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Xiangya RD 110, Changsha, 410078, China
| | - Zihao Li
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Xiangya RD 110, Changsha, 410078, China
| | - Mengshi Chen
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Xiangya RD 110, Changsha, 410078, China.
- Hunan Provincial Key Laboratory of Clinical Epidemiology, Central South University, Changsha, 410078, China.
| | - Zhenghui Xiao
- Hunan Provincial Key Laboratory of Pediatric Emergency, Hunan Children's Hospital, Changsha, 410006, China
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13
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Duan H, Zhang Q, Liu J, Li R, Wang D, Peng W, Wu C. Suppression of apoptosis in vascular endothelial cell, the promising way for natural medicines to treat atherosclerosis. Pharmacol Res 2021; 168:105599. [PMID: 33838291 DOI: 10.1016/j.phrs.2021.105599] [Citation(s) in RCA: 114] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 03/09/2021] [Accepted: 04/02/2021] [Indexed: 12/16/2022]
Abstract
Atherosclerosis, a chronic multifactorial disease, is closely related to the development of cardiovascular diseases and is one of the predominant causes of death worldwide. Normal vascular endothelial cells play an important role in maintaining vascular homeostasis and inhibiting atherosclerosis by regulating vascular tension, preventing thrombosis and regulating inflammation. Currently, accumulating evidence has revealed that endothelial cell apoptosis is the first step of atherosclerosis. Excess apoptosis of endothelial cells induced by risk factors for atherosclerosis is a preliminary event in atherosclerosis development and might be a target for preventing and treating atherosclerosis. Interestingly, accumulating evidence shows that natural medicines have great potential to treat atherosclerosis by inhibiting endothelial cell apoptosis. Therefore, this paper reviewed current studies on the inhibitory effect of natural medicines on endothelial cell apoptosis and summarized the risk factors that may induce endothelial cell apoptosis, including oxidized low-density lipoprotein (ox-LDL), reactive oxygen species (ROS), angiotensin II (Ang II), tumor necrosis factor-α (TNF-α), homocysteine (Hcy) and lipopolysaccharide (LPS). We expect this review to highlight the importance of natural medicines, including extracts and monomers, in the treatment of atherosclerosis by inhibiting endothelial cell apoptosis and provide a foundation for the development of potential antiatherosclerotic drugs from natural medicines.
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Affiliation(s)
- Huxinyue Duan
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, No. 1166, Liutai Avenue, Chengdu 611137, PR China
| | - Qing Zhang
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, No. 1166, Liutai Avenue, Chengdu 611137, PR China
| | - Jia Liu
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, No. 1166, Liutai Avenue, Chengdu 611137, PR China
| | - Ruolan Li
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, No. 1166, Liutai Avenue, Chengdu 611137, PR China
| | - Dan Wang
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, No. 1166, Liutai Avenue, Chengdu 611137, PR China
| | - Wei Peng
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, No. 1166, Liutai Avenue, Chengdu 611137, PR China.
| | - Chunjie Wu
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, No. 1166, Liutai Avenue, Chengdu 611137, PR China.
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Cai GL, Yang ZX, Guo DY, Hu CB, Yan ML, Yan J. Macrophages enhance lipopolysaccharide induced apoptosis via Ang1 and NF-κB pathways in human umbilical vein endothelial cells. Sci Rep 2021; 11:2918. [PMID: 33536546 PMCID: PMC7858588 DOI: 10.1038/s41598-021-82531-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 01/20/2021] [Indexed: 01/17/2023] Open
Abstract
Lipopolysaccharide (LPS) could induce apoptosis and dysfunction of endothelial cells. We aimed to reveal the effects of macrophages on cell proliferation and apoptosis in LPS induced human umbilical vein endothelial cells (HUVECs). THP-1 derived macrophages and HUVECs were co-cultured in the presence of LPS. Cell viability was measured by Cell Counting Kit-8 and apoptosis was analyzed by flow cytometry. Expression of Ang1, the NF-κB component p65 was evaluated by western blot and quantitative PCR. Small interfering RNAs (siRNAs) were used to knockdown the expression of proinflammatory cytokines and p65 in HUVECs. Plasmid transfection-mediated overexpression of Ang1 was employed to see its effects on cell proliferation and apoptosis in HUVECs. Macrophages enhanced LPS-induced proliferation impairments and apoptosis in HUVECs, which could be attenuated by siRNA-mediated knockdown of cytokines TNF-α, IL-1β, IL-6 and IL-12p70 in macrophages. The dysfunction of HUVECs was tightly associated with reduced Ang1 expression and increased phosphorylated p65 (p-65). Overexpression of Ang1 in HUVECs significantly decreased p-p65, suggesting negatively regulation of p-p65 by Ang1. Overexpression of Ang1, adding recombinant Ang1 or silencing of p65 substantially attenuated the dysfunction of HUVECs in terms of cell proliferation and apoptosis. In conclusions, THP-1-derived macrophages enhance LPS induced dysfunction of HUVECs via Ang1 and NF-κB pathways, suggesting new therapeutic targets for sepsis.
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Affiliation(s)
- Guo-Long Cai
- Department of Critical Care Medicine, Zhejiang Hospital, Hangzhou, 310013, Zhejiang, China
| | - Zhou-Xin Yang
- Department of Critical Care Medicine, Zhejiang Hospital, Hangzhou, 310013, Zhejiang, China.
| | - Dong-Yang Guo
- Department of Critical Care Medicine, Zhejiang Hospital, Hangzhou, 310013, Zhejiang, China
| | - Cai-Bao Hu
- Department of Critical Care Medicine, Zhejiang Hospital, Hangzhou, 310013, Zhejiang, China
| | - Mo-Lei Yan
- Department of Critical Care Medicine, Zhejiang Hospital, Hangzhou, 310013, Zhejiang, China
| | - Jing Yan
- Department of Critical Care Medicine, Zhejiang Hospital, Hangzhou, 310013, Zhejiang, China.
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15
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He Q, Wang Y, Yang H, Wang J, Zhang J, Liu D. Apelin‑36 protects against lipopolysaccharide‑induced acute lung injury by inhibiting the ASK1/MAPK signaling pathway. Mol Med Rep 2020; 23:6. [PMID: 33179090 PMCID: PMC7673347 DOI: 10.3892/mmr.2020.11644] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 09/30/2020] [Indexed: 11/20/2022] Open
Abstract
Apelin-36 is able to mediate a range of effects on various diseases, and is upregulated in lipopolysaccharide (LPS)-induced acute lung injury (ALI). However, to the best of our knowledge, whether apelin-36 is able to regulate LPS-induced ALI has yet to be investigated. The present study aimed to investigate the role of apelin-36 in LPS-induced ALI, and the putative underlying mechanisms. Rats were assigned to one of four treatment groups: The Control group, apelin-36 group, LPS group and LPS + apelin-36 group. At 4 h after intratracheal instillation of LPS (5 mg/kg), rats were intraperitoneally treated with 10 nmol/kg apelin-36. Subsequently, pathological manifestations and the extent of inflammation and apoptosis of the lung tissues were assessed. Untransfected and apoptosis signal-regulating kinase 1 (ASK1)-overexpressing Beas-2B cells were treated with LPS in the absence or presence of apelin-36, and subsequently the levels of inflammation and apoptosis were assessed. The results obtained showed that the level of apelin-36 was increased in the bronchoalveolar lavage fluid (BALF) of LPS-treated rats. Co-treatment with apelin-36 alleviated LPS-induced lung injury and pulmonary edema, reduced the levels of pro-inflammatory cytokines, including interleukin-6, monocyte chemoattractant protein-1 and tumor necrosis factor-α, in BALF, and inhibited apoptosis in the lung tissues. The presence of apelin-36 also blocked the activation of LPS-induced ASK1, p38, c-Jun N-terminal kinase and extracellular signal-regulated kinase in lung tissues. In vitro studies performed with Beas-2B cells showed that the addition of apelin-36 led to an increase in the cell viability of LPS-induced Beas-2B cells in a concentration-dependent manner. Additionally, co-treatment with 1 µM apelin-36 prevented LPS-induced inflammation and apoptosis. However, overexpression of ASK1 significantly reversed the inhibitory effects of apelin-36 on LPS-induced inflammation and apoptosis. Taken together, the results of the present study demonstrated that apelin-36 was able to protect against LPS-induced lung injury both in vivo and in vitro, and these actions may be dependent on inhibition of the ASK1/mitogen-activated protein kinase signaling pathway.
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Affiliation(s)
- Qiong He
- Department of Critical Care Medicine, People's Hospital of Ningxia Hui Autonomous Region (Ningxia Medical University Affiliated Autonomous Region People's Hospital), Yinchuan, Ningxia 750002, P.R. China
| | - Yuqiao Wang
- Department of Critical Care Medicine, People's Hospital of Ningxia Hui Autonomous Region (Ningxia Medical University Affiliated Autonomous Region People's Hospital), Yinchuan, Ningxia 750002, P.R. China
| | - Hua Yang
- Department of Critical Care Medicine, People's Hospital of Ningxia Hui Autonomous Region (Ningxia Medical University Affiliated Autonomous Region People's Hospital), Yinchuan, Ningxia 750002, P.R. China
| | - Jianmin Wang
- Department of Critical Care Medicine, People's Hospital of Ningxia Hui Autonomous Region (Ningxia Medical University Affiliated Autonomous Region People's Hospital), Yinchuan, Ningxia 750002, P.R. China
| | - Jia Zhang
- Department of Critical Care Medicine, People's Hospital of Ningxia Hui Autonomous Region (Ningxia Medical University Affiliated Autonomous Region People's Hospital), Yinchuan, Ningxia 750002, P.R. China
| | - Danni Liu
- Department of Cardiology, People's Hospital of Ningxia Hui Autonomous Region (Ningxia Medical University Affiliated Autonomous Region People's Hospital), Yinchuan, Ningxia 750002, P.R. China
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16
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Liu G, Liao Y, Sun B, Guo Y, Deng M, Li Y, Liu D. Effects of chronic heat stress on mRNA and miRNA expressions in dairy cows. Gene 2020; 742:144550. [PMID: 32165293 DOI: 10.1016/j.gene.2020.144550] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 01/20/2020] [Accepted: 03/08/2020] [Indexed: 01/27/2023]
Abstract
Heat stress has a negative impact on dairy cow productivity. In order to reveal the mechanisms of heat-stress response, the mRNA and miRNA expression profiles of five cows under chronic heat-stress and thermoneutral conditions were assayed in blood by high-throughput sequencing technology. A total of 540 mRNAs and 9 miRNAs were expressed differently under heat-stress and thermoneutral conditions. Functional analyses revealed that MAPK signaling pathway, cellular senescence, circadian entrainment, aldosterone synthesis and secretion, and pathways in cancer were enriched for differently expressed mRNAs; meanwhile cGMP-PKG signaling pathway, thermogenesis, and protein digestion and absorption were enriched for differently expressed miRNAs. In addition, GADD45G, TGFB2, and GNG11 may play roles in the heat stress, and bta-miR-423-5p might be one of the regulators of heat-stress response in cows as potential mediators of chronic heat-stress response. In conclusion, the present study described the mRNA and miRNA expression patterns in blood extracted from cows during the transition from heat-stress to thermoneutral conditions. The results provide new data that could help in identifying mechanisms that mediate cows' response to chronic heat stress.
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Affiliation(s)
- Guangbin Liu
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China.
| | - Yingxin Liao
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Maoming Agriculture&Forestry Technical College, Maoming 525000, China.
| | - Baoli Sun
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China.
| | - Yongqing Guo
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China.
| | - Ming Deng
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China.
| | - Yaokun Li
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China.
| | - Dewu Liu
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China.
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17
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Protective role of endothelial calpain knockout in lipopolysaccharide-induced acute kidney injury via attenuation of the p38-iNOS pathway and NO/ROS production. Exp Mol Med 2020; 52:702-712. [PMID: 32346126 PMCID: PMC7210976 DOI: 10.1038/s12276-020-0426-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 03/20/2020] [Accepted: 03/23/2020] [Indexed: 12/16/2022] Open
Abstract
To explore the role of calpain and its signaling pathway in lipopolysaccharide (LPS)-induced acute kidney injury (AKI), animal models of endotoxemia were established by administration of LPS to mice with endothelial-specific Capn4 knockout (TEK/Capn4−/−), mice with calpastatin (an endogenous calpain inhibitor) overexpression (Tg-CAST) and mice with myeloid-specific Capn4 knockout (LYZ/Capn4−/−). Mouse pulmonary microvascular endothelial cells (PMECs) were used as a model of the microvascular endothelium and were stimulated with LPS. Renal function, renal inducible nitric oxide synthase (iNOS) and endothelial NOS (eNOS) expression, cellular apoptosis, plasma and renal levels of NO and reactive oxygen species (ROS), and phosphorylation of mitogen-activated protein kinase (MAPK) family members (p38, ERK1/2, and JNK1/2) were examined. Moreover, a calpain inhibitor, calpastatin overexpression adenoviruses and MAPK inhibitors were used. Significant renal dysfunction was induced by LPS stimulation, and recovery was observed in TEK/Capn4−/− and Tg-CAST mice but not in LYZ/Capn4−/− mice. Endothelial Capn4 knockout also abrogated the LPS-induced increases in renal iNOS expression, caspase-3 activity and apoptosis and plasma and renal NO and ROS levels but did not obviously affect renal eNOS expression. Moreover, LPS increased both calpain and caspase-3 activity, and only the expression of iNOS in PMECs was accompanied by increased phosphorylation of p38 and JNK. Inhibiting calpain activity or p38 phosphorylation alleviated the increased iNOS expression, NO/ROS production, and cellular apoptosis induced by LPS. These results suggest that endothelial calpain plays a protective role in LPS-induced AKI by inhibiting p38 phosphorylation, thus attenuating iNOS expression and further decreasing NO and ROS overproduction-induced endothelial apoptosis. Therapies that inhibit the enzyme calpain could alleviate the effects of acute kidney injury according to researchers in China and Canada. Acute kidney injury is induced by endotoxemia, in which changes in the permeability of the intestine allow lipopolysaccharides (LPS) to pass from gut bacteria into the bloodstream. Calpain is known to be active during this process. Zhifeng Liu at the General Hospital of Guangzhou Military Command and co-workers induced endotoxemia in various mouse models by injecting them with LPS. The LPS induced significant kidney dysfunction and cell death, but these were alleviated in mice that were genetically modified to block calpain activity in the blood vessel lining, and in mice that overexpressed calpastatin, a calpain inhibitor. Blocking calpain reduces the expression of nitric oxide synthases that damage endothelial cells.
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18
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Interferon-γ and high glucose-induced opening of Cx43 hemichannels causes endothelial cell dysfunction and damage. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2020; 1867:118720. [PMID: 32302669 DOI: 10.1016/j.bbamcr.2020.118720] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 04/09/2020] [Accepted: 04/12/2020] [Indexed: 12/17/2022]
Abstract
Both IFN-γ or high glucose have been linked to systemic inflammatory imbalance with serious repercussions not only for endothelial function but also for the formation of the atherosclerotic plaque. Although the uncontrolled opening of connexin hemichannels underpins the progression of various diseases, whether they are implicated in endothelial cell dysfunction and damage evoked by IFN-γ plus high glucose remains to be fully elucidated. In this study, by using live cell imaging and biochemical approaches, we demonstrate that IFN-γ plus high glucose augment endothelial connexin43 hemichannel activity, resulting in the increase of ATP release, ATP-mediated Ca2+ dynamics and production of nitric oxide and superoxide anion, as well as impaired insulin-mediated uptake and intercellular diffusion of glucose and cell survival. Based on our results, we propose that connexin 43 hemichannel inhibition could serve as a new approach for tackling the activation of detrimental signaling resulting in endothelial cell dysfunction and death caused by inflammatory mediators during atherosclerosis secondary to diabetes mellitus.
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19
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Wu Y, Wang Y, Gong S, Tang J, Zhang J, Li F, Yu B, Zhang Y, Kou J. Ruscogenin alleviates LPS-induced pulmonary endothelial cell apoptosis by suppressing TLR4 signaling. Biomed Pharmacother 2020; 125:109868. [PMID: 32036210 DOI: 10.1016/j.biopha.2020.109868] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 01/15/2020] [Accepted: 01/17/2020] [Indexed: 12/25/2022] Open
Abstract
Acute lung injury (ALI) or its most advanced form, acute respiratory distress syndrome (ARDS) is a severe inflammatory pulmonary process triggered by varieties of pathophysiological factors, among which apoptosis of pulmonary endothelial cells plays a critical role in the progression of ALI/ARDS. Ruscogenin (RUS) has been found to exert significant protective effect on ALI induced by lipopolysaccharides (LPS), but there is little information about its role in LPS-induced pulmonary endothelial cell apoptosis. The aim of the present study was to investigate the underlying mechanism in which RUS attenuates LPS-induced pulmonary endothelial cell apoptosis. Mice were challenged with LPS (5 mg/kg) by intratracheal instillation for 24 h to induce apoptosis of pulmonary endothelial cells in model group. RUS (three doses: 0.1, 0.3, and 1 mg/kg) was administrated orally 1 h prior to LPS challenge. The results showed that RUS could attenuate LPS-induced lung injury and pulmonary endothelial apoptosis significantly. And we observed that RUS inhibited the activation of TLR4/MYD88/NF-κB pathway in pulmonary endothelium after LPS treatment. In murine lung vascular endothelial cells (MLECs) we further confirmed that RUS (1 μmol/L) markedly ameliorated MLECs apoptosis by suppressing TLR4 signaling. By using TLR4 knockout mice we found that TLR4 was essential for the RUS-mediated eff ;ect on LPS-stimulated pulmonary endothelial apoptosis. Collectively, our results indicate that RUS plays a protective role against LPS-induced endothelial cell apoptosis via regulating TLR4 signaling, and may be a promising agent in the management of ALI.
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Affiliation(s)
- Yunhao Wu
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing 211198, PR China
| | - Yuwei Wang
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing 211198, PR China
| | - Shuaishuai Gong
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing 211198, PR China
| | - Jiahui Tang
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing 211198, PR China
| | - Jiazhi Zhang
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing 211198, PR China
| | - Fang Li
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing 211198, PR China
| | - Boyang Yu
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing 211198, PR China
| | - Yuanyuan Zhang
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing 211198, PR China.
| | - Junping Kou
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing 211198, PR China.
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20
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Fusobacterium nucleatum Facilitates Apoptosis, ROS Generation, and Inflammatory Cytokine Production by Activating AKT/MAPK and NF- κB Signaling Pathways in Human Gingival Fibroblasts. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:1681972. [PMID: 31737164 PMCID: PMC6815639 DOI: 10.1155/2019/1681972] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 05/24/2019] [Accepted: 06/02/2019] [Indexed: 12/20/2022]
Abstract
Fusobacterium nucleatum (F. nucleatum) plays key roles in the initiation and progression of periodontitis. However, the pathogenic effect of F. nucleatum on human oral tissues and cells has not been fully evaluated. In this study, we aimed to analyze the pathogenic effects of F. nucleatum on human gingival fibroblasts (GFs) and clarify the potential mechanisms. RNA-sequencing analysis confirmed that F. nucleatum significantly altered the gene expression of GF as the stimulation time increased. Cell counting and EdU-labeling assays indicated that F. nucleatum inhibited GF proliferation and promoted cell apoptosis in a time- and dose-dependent manner. In addition, cell apoptosis, intracellular reactive oxygen species (ROS) generation, and proinflammatory cytokine production were dramatically elevated after F. nucleatum stimulation. Furthermore, we found that the AKT/MAPK and NF-κB signaling pathways were significantly activated by F. nucleatum infection and that a large number of genes related to cellular proliferation, apoptosis, ROS, and inflammatory cytokine production downstream of AKT/MAPK and NF-κB signaling pathways were significantly altered in F. nucleatum-stimulated GFs. These findings suggest that F. nucleatum inhibits GF proliferation and promotes cell apoptosis, ROS generation, and inflammatory cytokine production partly by activating the AKT/MAPK and NF-κB signaling pathways. Our study opens a new window for understanding the pathogenic effects of periodontal pathogens on the host oral system.
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21
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Fawad M, Abbas M, Zhang L, Zhang Y, Guo Y. ASK1-p38 cascaded signal mediates pulmonary microvascular endothelial barrier injury induced by the return of PHSML in rats. RSC Adv 2019; 9:4870-4875. [PMID: 35514647 PMCID: PMC9060572 DOI: 10.1039/c8ra08473d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 01/30/2019] [Indexed: 11/23/2022] Open
Abstract
The return of post-hemorrhagic shock mesenteric lymph (PHSML) induces pulmonary vascular endothelial barrier dysfunction, which results in acute lung injury. Activation of the apoptosis signal-regulated kinase 1 (ASK1) and p38 mitogen-activated protein kinase (p38 MAPK) pathway has been shown to trigger inflammatory responses. However, whether the ASK1-p38 MAPK pathway is involved in the PHSML-induced pulmonary endothelial barrier dysfunction remains unclear. In the present study, permeability changes of pulmonary capillaries were found in vivo, and activation of the ASK1-p38 MAPK pathway was determined in vitro. PMVEC barrier dysfunction was determined by measuring TEER. Furthermore, junctional and cytoskeletal protein expressions were analyzed. The results showed that hemorrhagic shock led to a marked increase in the permeability of pulmonary capillaries in vivo, which was markedly alleviated by PHSML drainage. In cultured pulmonary microvascular endothelial cells (PMVECs), PHSML reduced the endothelial barrier function accompanied by upregulated p-ASK1 and p-p38 MAPK protein expression, impaired the cytoskeletal protein structure, and down-regulated junction protein expression. These adverse effects were eliminated by applying either Trx1 (ASK1 inhibitor) or SB203580 (p38 MAPK inhibitor). These results indicated that the ASK1-p38 MAPK pathway mediates PHSML-induced pulmonary vascular endothelial barrier dysfunction during hemorrhagic shock. The return of post-hemorrhagic shock mesenteric lymph (PHSML) induces pulmonary vascular endothelial barrier dysfunction, which results in acute lung injury.![]()
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Affiliation(s)
- Muhammad Fawad
- Institute of Microcirculation
- Hebei North University
- Zhangjiakou
- China
| | - Muhammad Abbas
- Institute of Microcirculation
- Hebei North University
- Zhangjiakou
- China
| | - Limin Zhang
- Institute of Microcirculation
- Hebei North University
- Zhangjiakou
- China
| | - Yuping Zhang
- Institute of Microcirculation
- Hebei North University
- Zhangjiakou
- China
| | - Yaxiong Guo
- Institute of Microcirculation
- Hebei North University
- Zhangjiakou
- China
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22
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Dietary curcumin supplementation does not alter peripheral blood mononuclear cell responses to exertional heat stress. Eur J Appl Physiol 2018; 118:2707-2717. [DOI: 10.1007/s00421-018-3998-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Accepted: 09/18/2018] [Indexed: 10/28/2022]
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Patton MG, Gillum TL, Szymanski MC, Gould LM, Lauterbach CJ, Vaughan RA, Kuennen MR. Heat acclimation increases inflammatory and apoptotic responses to subsequent LPS challenge in C2C12 myotubes. Cell Stress Chaperones 2018; 23:1117-1128. [PMID: 29907924 PMCID: PMC6111074 DOI: 10.1007/s12192-018-0923-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Revised: 05/26/2018] [Accepted: 05/28/2018] [Indexed: 01/12/2023] Open
Abstract
This work investigated the ability of a 6-day heat acclimation protocol to impart heat acclimation-mediated cross-tolerance (HACT) in C2C12 myotubes, as indicated by changes in inflammatory and apoptotic responses to subsequent lipopolysaccharide (LPS) challenge. Myotubes were incubated at 40 °C for 2 h/day over 6 days (HA) or maintained for 6 days at 37 °C (C). Following 24 h recovery, myotubes from each group received either no stimulation or 500 ng/ml LPS for 2 h (HA + LPS and C + LPS, respectively). Cell lysates were collected and analyzed for protein markers of the heat shock response, inflammation, and apoptosis. As compared to C, HA exhibited an elevated heat shock response [HSP70 (+ 99%); HSP60 (+ 216%); HSP32 (+ 40%); all p < 0.01] and reduced inflammatory and apoptotic signaling [p-NF-ĸB:NF-ĸB (- 99%%); p-JNK (- 49%); all p < 0.01]. When compared to C + LPS, HA + LPS also exhibited an elevated heat shock response [HSP70 (+ 68%); HSP60 (+ 32%); HSP32 (+ 38%); all p < 0.01]. However, inflammatory and apoptotic responses in HA + LPS were increased [p-IKBa:IKBa (+ 432%); p-NF-ĸB:NF-ĸB (+ 283%); caspase-8p18 (+ 53%); p-JNK (+ 41%); all p < 0.05]. This unanticipated finding may be due to increased TLR4-mediated signaling capacity in HA + LPS, as indicated by upregulation of TLR4 [(+ 24%); MyD88 (+ 308%); p-NIK (+ 199%); and p-IKKα/b (+ 81%); all p < 0.05]. Data suggest HA reduces inflammatory and apoptotic signaling in skeletal muscle cells that are maintained under basal conditions. However, HACT is selective and does not apply to TLR4 signaling in the present model.
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Affiliation(s)
- Meghan G Patton
- Department of Exercise Science, High Point University, One University Parkway, High Point, NC, 27268, USA
| | - Trevor L Gillum
- Department of Kinesiology, California Baptist University, Riverside, CA, USA
| | - Mandy C Szymanski
- Department of Exercise Science, High Point University, One University Parkway, High Point, NC, 27268, USA
| | - Lacey M Gould
- Department of Exercise Science, High Point University, One University Parkway, High Point, NC, 27268, USA
| | - Claire J Lauterbach
- Department of Exercise Science, High Point University, One University Parkway, High Point, NC, 27268, USA
| | - Roger A Vaughan
- Department of Exercise Science, High Point University, One University Parkway, High Point, NC, 27268, USA
| | - Matthew R Kuennen
- Department of Exercise Science, High Point University, One University Parkway, High Point, NC, 27268, USA.
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Xie W, Lu Q, Wang K, Lu J, Gu X, Zhu D, Liu F, Guo Z. miR-34b-5p inhibition attenuates lung inflammation and apoptosis in an LPS-induced acute lung injury mouse model by targeting progranulin. J Cell Physiol 2018; 233:6615-6631. [PMID: 29150939 PMCID: PMC6001482 DOI: 10.1002/jcp.26274] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2017] [Accepted: 11/14/2017] [Indexed: 12/14/2022]
Abstract
Inflammation and apoptosis play important roles in the initiation and progression of acute lung injury (ALI). Our previous study has shown that progranulin (PGRN) exerts lung protective effects during LPS-induced ALI. Here, we have investigated the potential roles of PGRN-targeting microRNAs (miRNAs) in regulating inflammation and apoptosis in ALI and have highlighted the important role of PGRN. LPS-induced lung injury and the protective roles of PGRN in ALI were first confirmed. The function of miR-34b-5p in ALI was determined by transfection of a miR-34b-5p mimic or inhibitor in intro and in vivo. The PGRN level gradually increased and subsequently significantly decreased, reaching its lowest value by 24 hr; PGRN was still elevated compared to the control. The change was accompanied by a release of inflammatory mediators and accumulation of inflammatory cells in the lungs. Using bioinformatics analysis and RT-PCR, we demonstrated that, among 12 putative miRNAs, the kinetics of the miR-34b-5p levels were closely associated with PGRN expression in the lung homogenates. The gain- and loss-of-function analysis, dual-luciferase reporter assays, and rescue experiments confirmed that PGRN was the functional target of miR-34b-5p. Intravenous injection of miR-34b-5p antagomir in vivo significantly inhibited miR-34b-5p up-regulation, reduced inflammatory cytokine release, decreased alveolar epithelial cell apoptosis, attenuated lung inflammation, and improved survival by targeting PGRN during ALI. miR-34b-5p knockdown attenuates lung inflammation and apoptosis in an LPS-induced ALI mouse model by targeting PGRN. This study shows that miR-34b-5p and PGRN may be potential targets for ALI treatments.
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Affiliation(s)
- Wang Xie
- Department of Respiratory MedicineShanghai East HospitalTongji University School of MedicinePudongShanghaiChina
| | - Qingchun Lu
- Department of Respiratory MedicineShanghai East HospitalTongji University School of MedicinePudongShanghaiChina
| | - Kailing Wang
- Department of Respiratory MedicineShanghai East HospitalTongji University School of MedicinePudongShanghaiChina
| | - Jingjing Lu
- Department of Respiratory MedicineShanghai East HospitalTongji University School of MedicinePudongShanghaiChina
| | - Xia Gu
- Department of Respiratory MedicineShanghai East HospitalTongji University School of MedicinePudongShanghaiChina
| | - Dongyi Zhu
- Department of Respiratory MedicineShanghai East HospitalTongji University School of MedicinePudongShanghaiChina
| | - Fanglei Liu
- Department of Respiratory MedicineShanghai East HospitalTongji University School of MedicinePudongShanghaiChina
| | - Zhongliang Guo
- Department of Respiratory MedicineShanghai East HospitalTongji University School of MedicinePudongShanghaiChina
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25
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Sáez JC, Contreras-Duarte S, Gómez GI, Labra VC, Santibañez CA, Gajardo-Gómez R, Avendaño BC, Díaz EF, Montero TD, Velarde V, Orellana JA. Connexin 43 Hemichannel Activity Promoted by Pro-Inflammatory Cytokines and High Glucose Alters Endothelial Cell Function. Front Immunol 2018; 9:1899. [PMID: 30158937 PMCID: PMC6104120 DOI: 10.3389/fimmu.2018.01899] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 07/31/2018] [Indexed: 12/13/2022] Open
Abstract
The present work was done to elucidate whether hemichannels of a cell line derived from endothelial cells are affected by pro-inflammatory conditions (high glucose and IL-1β/TNF-α) known to lead to vascular dysfunction. We used EAhy 926 cells treated with high glucose and IL-1β/TNF-α. The hemichannel activity was evaluated with the dye uptake method and was abrogated with selective inhibitors or knocking down of hemichannel protein subunits with siRNA. Western blot analysis, cell surface biotinylation, and confocal microscopy were used to evaluate total and plasma membrane amounts of specific proteins and their cellular distribution, respectively. Changes in intracellular Ca2+ and nitric oxide (NO) signals were estimated by measuring FURA-2 and DAF-FM probes, respectively. High glucose concentration was found to elevate dye uptake, a response that was enhanced by IL-1β/TNF-α. High glucose plus IL-1β/TNF-α-induced dye uptake was abrogated by connexin 43 (Cx43) but not pannexin1 knockdown. Furthermore, Cx43 hemichannel activity was associated with enhanced ATP release and activation of p38 MAPK, inducible NO synthase, COX2, PGE2 receptor EP1, and P2X7/P2Y1 receptors. Inhibition of the above pathways prevented completely the increase in Cx43 hemichannel activity of cells treated high glucose and IL-1β/TNF-α. Both synthetic and endogenous cannabinoids (CBs) also prevented the increment in Cx43 hemichannel opening, as well as the subsequent generation and release of ATP and NO induced by pro-inflammatory conditions. The counteracting action of CBs also was extended to other endothelial alterations evoked by IL-1β/TNF-α and high glucose, including increased ATP-dependent Ca2+ dynamics and insulin-induced NO production. Finally, inhibition of Cx43 hemichannels also prevented the ATP release from endothelial cells treated with IL-1β/TNF-α and high glucose. Therefore, we propose that reduction of hemichannel activity could represent a strategy against the activation of deleterious pathways that lead to endothelial dysfunction and possibly cell damage evoked by high glucose and pro-inflammatory conditions during cardiovascular diseases.
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Affiliation(s)
- Juan C Sáez
- Departamento de Fisiología, Pontificia Universidad Católica de Chile, Santiago de Chile, Chile.,Instituto de Neurociencias, Centro Interdisciplinario de Neurociencias de Valparaíso, Universidad de Valparaíso, Valparaíso, Chile
| | - Susana Contreras-Duarte
- Departamento de Fisiología, Pontificia Universidad Católica de Chile, Santiago de Chile, Chile.,Departamento de Ginecología y Obstetricia, Escuela de Medicina, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Gonzalo I Gómez
- Departamento de Neurología, Escuela de Medicina and Centro Interdisciplinario de Neurociencias, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Valeria C Labra
- Departamento de Neurología, Escuela de Medicina and Centro Interdisciplinario de Neurociencias, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Cristian A Santibañez
- Departamento de Neurología, Escuela de Medicina and Centro Interdisciplinario de Neurociencias, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Rosario Gajardo-Gómez
- Departamento de Neurología, Escuela de Medicina and Centro Interdisciplinario de Neurociencias, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Beatriz C Avendaño
- Departamento de Neurología, Escuela de Medicina and Centro Interdisciplinario de Neurociencias, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Esteban F Díaz
- Departamento de Neurología, Escuela de Medicina and Centro Interdisciplinario de Neurociencias, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Trinidad D Montero
- Departamento de Neurología, Escuela de Medicina and Centro Interdisciplinario de Neurociencias, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Victoria Velarde
- Departamento de Fisiología, Pontificia Universidad Católica de Chile, Santiago de Chile, Chile
| | - Juan A Orellana
- Departamento de Neurología, Escuela de Medicina and Centro Interdisciplinario de Neurociencias, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
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26
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Bain AR, Ainslie PN, Bammert TD, Hijmans JG, Sekhon M, Hoiland RL, Flück D, Donnelly J, DeSouza CA. Passive heat stress reduces circulating endothelial and platelet microparticles. Exp Physiol 2018; 102:663-669. [PMID: 28397383 DOI: 10.1113/ep086336] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 04/06/2017] [Indexed: 01/06/2023]
Abstract
NEW FINDINGS What is the central question of this study? Does passive heat stress of +2°C oesophageal temperature change concentrations of circulating arterial endothelial- and platelet-derived microparticles in healthy adults? What is the main finding and its importance? Concentrations of circulating endothelial- and platelet-derived microparticles were markedly decreased in heat stress. Reductions in circulating microparticles might indicate favourable vascular changes associated with non-pathological hyperthermia. Interest in circulating endothelial- and platelet-derived microparticles (EMPs and PMPs, respectively) has increased because of their potential pathogenic role in vascular disease and as biomarkers for vascular health. Hyperthermia is commonly associated with a pro-inflammatory stress but might also provide vascular protection when the temperature elevation is non-pathological. Circulating microparticles might contribute to the cellular adjustments and resultant vascular impacts of hyperthermia. Here, we determined whether circulating concentrations of arterial EMPs and PMPs are altered by passive heat stress (+2°C oesophageal temperature). Ten healthy young men (age 23 ± 3 years) completed the study. Hyperthermia was achieved by circulating ∼49°C water through a water-perfused suit that covered the entire body except the hands, feet and head. Arterial (radial) blood samples were obtained immediately before heating (normothermia) and in hyperthermia. The mean ± SD oesophageal temperature in normothermia was 37.2 ± 0.1°C and in hyperthermia 39.1 ± 0.1°C. Concentrations of circulating EMPs and PMPs were markedly decreased in hyperthermia. Activation-derived EMPs were reduced by ∼30% (mean ± SD; from 61 ± 8 to 43 ± 7 microparticles μl-1 ; P < 0.05) and apoptosis-derived EMPs by ∼45% (from 46 ± 7 to 23 ± 3 microparticles μl-1 ; P < 0.05). Likewise, circulating PMPs were reduced by ∼75% in response to hyperthermia (from 256 ± 43 to 62 ± 14 microparticles μl-1 ). These beneficial reductions in circulating EMPs and PMPs in response to a 2°C increase in core temperature might partly underlie the reported vascular improvements following therapeutic bouts of physiological hyperthermia.
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Affiliation(s)
- Anthony R Bain
- Department of Integrative Physiology, Integrative Vascular Biology Laboratory, University of Colorado, Boulder, CO, USA.,Faculty of Health and Social Development, Centre for Heart, Lung & Vascular Health, University of British Columbia, Kelowna, BC, Canada
| | - Philip N Ainslie
- Faculty of Health and Social Development, Centre for Heart, Lung & Vascular Health, University of British Columbia, Kelowna, BC, Canada
| | - Tyler D Bammert
- Department of Integrative Physiology, Integrative Vascular Biology Laboratory, University of Colorado, Boulder, CO, USA
| | - Jamie G Hijmans
- Department of Integrative Physiology, Integrative Vascular Biology Laboratory, University of Colorado, Boulder, CO, USA
| | - Mypinder Sekhon
- Faculty of Health and Social Development, Centre for Heart, Lung & Vascular Health, University of British Columbia, Kelowna, BC, Canada.,Division of Critical Care Medicine and Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Ryan L Hoiland
- Faculty of Health and Social Development, Centre for Heart, Lung & Vascular Health, University of British Columbia, Kelowna, BC, Canada
| | - Daniela Flück
- Faculty of Health and Social Development, Centre for Heart, Lung & Vascular Health, University of British Columbia, Kelowna, BC, Canada
| | - Joseph Donnelly
- Brain Physics Laboratory, Division of Academic Neurosurgery, Department of Clinical Neurosciences, Addenbrookes Hospital, University of Cambridge, Cambridge, UK
| | - Christopher A DeSouza
- Department of Integrative Physiology, Integrative Vascular Biology Laboratory, University of Colorado, Boulder, CO, USA
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l-Theanine prevents ETEC-induced liver damage by reducing intrinsic apoptotic response and inhibiting ERK1/2 and JNK1/2 signaling pathways. Eur J Pharmacol 2018; 818:184-190. [DOI: 10.1016/j.ejphar.2017.10.050] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 10/22/2017] [Accepted: 10/23/2017] [Indexed: 11/17/2022]
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28
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Ginkgolide B Suppresses TLR4-Mediated Inflammatory Response by Inhibiting the Phosphorylation of JAK2/STAT3 and p38 MAPK in High Glucose-Treated HUVECs. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:9371602. [PMID: 28785380 PMCID: PMC5529656 DOI: 10.1155/2017/9371602] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 05/22/2017] [Accepted: 05/30/2017] [Indexed: 12/23/2022]
Abstract
Aim Ginkgolide B is a Ginkgo biloba leaf extract that has been identified as a natural platelet-activating factor receptor (PAFR) antagonist. We investigated the effect of ginkgolide B on high glucose-induced TLR4 activation in human umbilical vein endothelial cells (HUVECs). Methods Protein expression was analyzed by immunoblotting. Small-interfering RNA (siRNA) was used to knock down PAFR and TLR4 expression. Results Ginkgolide B suppressed the expression of TLR4 and MyD88 that was induced by high glucose. Ginkgolide B also reduced the levels of platelet endothelial cell adhesion molecule-1, interleukin-6, and monocyte chemotactic protein 1. Further, we examined the association between PAFR and TLR4 by coimmunoprecipitation. The result showed that high glucose treatment caused the binding of PAFR and TLR4, whereas ginkgolide B abolished this binding. The functional analysis indicated that PAFR siRNA treatment reduced TLR4 expression, and TLR4 siRNA treatment decreased PAFR expression in high glucose-treated HUVECs, further supporting the coimmunoprecipitation data. Ginkgolide B inhibited the phosphorylation of Janus kinase 2 (JAK2)/signal transducer and activator of transcription 3 (STAT3) and p38 mitogen-activated protein kinase (MAPK). Conclusion Ginkgolide B exerted protective effects by inhibiting the TLR4-mediated inflammatory response in high glucose-treated endothelial cells. The mechanism of action of ginkgolide B might be associated with inhibition of the JAK2/STAT3 and p38 MAPK phosphorylation.
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Tseng SC, Shen TS, Wu CC, Chang IL, Chen HY, Hsieh CP, Cheng CH, Chen CL. Methyl Protodioscin Induces Apoptosis in Human Osteosarcoma Cells by Caspase-Dependent and MAPK Signaling Pathways. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:2670-2676. [PMID: 28301149 DOI: 10.1021/acs.jafc.6b04800] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Methyl protodioscin (MPD), a furostanol saponin derived from the rhizomes of Dioscorea collettii var. hypoglauca (Dioscoreaceae), has been shown to exhibit broad bioactivities such as anti-inflammation and antitumor activities. Here, we explored the molecular mechanisms by which MPD induced apoptosis in MG-63 cells. The data showed that MPD significantly suppressed cell growth (cell viabilities: 22.5 ± 1.9% for 8 μM MPD versus 100 ± 1.4% for control, P < 0.01) and enhanced cell apoptosis. The exposure to MPD resulted in a significant induction of reactive oxygen species, loss of mitochondrial membrane potential, and activation of caspase-9 and caspase-3 (P < 0.01, all cases). Furthermore, treatment with MPD increased the levels of phosphorylated JNK and p38 MAPK and markedly decreased the levels of phosphorylated ERK in MG-63 cells. Co-administration of the JNK-specific antagonist, the p38-specific antagonist, or the caspase antagonist (P < 0.05, all cases) has reversed the apoptotic effects in MPD treatment. We also found that exposure to MPD resulted in a significant reduction in the protein level of anti-apoptotic proteins Bcl-2, survivin, and XIAP (P < 0.05, all cases). In conclusion, our results indicate that MPD induces apoptosis of human osteosarcoma MG-63 cells, at least in part, by caspase-dependent and MAPK signaling pathways.
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Affiliation(s)
- Shun-Cheng Tseng
- Department of Orthopedic Surgery, Changhua Christian Hospital , Changhua 50006, Taiwan, R.O.C
| | - Tai-Shan Shen
- Department of Orthopedic Surgery, Changhua Christian Hospital , Changhua 50006, Taiwan, R.O.C
| | - Chia-Chieh Wu
- Department of Orthopedic Surgery, Changhua Christian Hospital , Changhua 50006, Taiwan, R.O.C
- Orthopedics & Sports Medicine Laboratory, Changhua Christian Hospital , Changhua 50006, Taiwan, R.O.C
- Institute of Biomedical Sciences, National Chung Hsing University , Taichung 40227, Taiwan, R.O.C
- School of Medicine, Kaohsiung Medical University , Kaohsiung 80708, Taiwan, R.O.C
| | - Ing-Lin Chang
- Department of Orthopedic Surgery, Changhua Christian Hospital , Changhua 50006, Taiwan, R.O.C
| | - Hsin-Yao Chen
- Department of Orthopedic Surgery, Changhua Christian Hospital , Changhua 50006, Taiwan, R.O.C
| | - Chen-Pu Hsieh
- Department of Orthopedic Surgery, Changhua Christian Hospital , Changhua 50006, Taiwan, R.O.C
- Orthopedics & Sports Medicine Laboratory, Changhua Christian Hospital , Changhua 50006, Taiwan, R.O.C
| | - Chun-Hsiang Cheng
- Orthopedics & Sports Medicine Laboratory, Changhua Christian Hospital , Changhua 50006, Taiwan, R.O.C
| | - Chiu-Liang Chen
- Department of Orthopedic Surgery, Changhua Christian Hospital , Changhua 50006, Taiwan, R.O.C
- Department of Nursing, Da Yeh University , Changhua 51591, Taiwan, R.O.C
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30
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Ge GF, Shi WW, Yu CH, Jin XY, Zhang HH, Zhang WY, Wang LC, Yu B. Baicalein attenuates vinorelbine-induced vascular endothelial cell injury and chemotherapeutic phlebitis in rabbits. Toxicol Appl Pharmacol 2017; 318:23-32. [DOI: 10.1016/j.taap.2017.01.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 01/19/2017] [Accepted: 01/22/2017] [Indexed: 12/14/2022]
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Calpain-1 resident in lipid raft/caveolin-1 membrane microdomains plays a protective role in endothelial cells. Biochimie 2017; 133:20-27. [DOI: 10.1016/j.biochi.2016.12.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 12/07/2016] [Indexed: 12/20/2022]
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32
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Huang Z, Dong X, Zhuang X, Hu X, Wang L, Liao X. Exogenous hydrogen sulfide protects against high glucose‑induced inflammation and cytotoxicity in H9c2 cardiac cells. Mol Med Rep 2016; 14:4911-4917. [PMID: 27748941 DOI: 10.3892/mmr.2016.5846] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Accepted: 09/02/2016] [Indexed: 11/06/2022] Open
Abstract
Hyperglycemia serves an important role in the pathogenesis of diabetic cardiomyopathy. The aim of the present study was to investigate whether exogenous hydrogen sulfide (H2S) protects against high glucose‑induced inflammation and cytotoxicity in cardiac cells by inhibiting the p38 mitogen‑activated protein kinase (MAPK)/nuclear factor‑κB (NF‑κB), cyclooxygenase‑2 (COX‑2) and inducible nitric oxide synthase (iNOS) signaling pathways. Rat H9c2 myocardium cells were exposed to 33 mM glucose (high glucose, HG) for 24 h to stimulate HG‑induced cytotoxicity. One group of cells was pretreated with NaHS (a donor of H2S) prior to HG exposure, and cell viability was determined using the Cell Counting Kit‑8 assay. The protein expression levels of p38MAPK, the phosphorylated p65 subunit of NF‑κB, iNOS, COX‑2 and caspase‑3 were analyzed by western blotting, and the protein expression levels of interleukin (IL)‑1β and IL‑6 were detected by enzyme‑linked immunosorbent assay (ELISA). Pretreatment of H9c2 cells with NaHS for 30 min prior to exposure to HG significantly ameliorated the expression of p38MAPK and NF‑κB. In addition, pretreatment with NaHS markedly attenuated p38MAPK/NF‑κB‑mediated cytotoxicity and inflammation, as evidenced by the significant increase in cell viability and decrease in iNOS, COX‑2, IL‑1β and IL‑6 expression levels. Furthermore, treatment of cells with NaHS significantly decreased the expression of caspase‑3, which suggested that NaHS attenuated HG‑induced apoptosis. In conclusion, the results of the present study provided evidence to suggest that exogenous H2S protects against HG‑induced cytotoxicity and inflammation in H9c2 cardiac cells. H2S may exert these cytoprotective effects via inhibition of the p38MAPK/NF‑κB, COX‑2 and iNOS signaling pathways.
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Affiliation(s)
- Zena Huang
- Department of Cardiology, The First Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Xiaobian Dong
- Department of Cardiology, The First Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Xiaodong Zhuang
- Department of Cardiology, The First Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Xun Hu
- Department of Cardiology, The First Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Lichun Wang
- Department of Cardiology, The First Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Xinxue Liao
- Department of Cardiology, The First Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
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Zhou M, Feng M, Fu LL, Ji LD, Zhao JS, Xu J. Toxicogenomic analysis identifies the apoptotic pathway as the main cause of hepatotoxicity induced by tributyltin. Food Chem Toxicol 2016; 97:316-326. [PMID: 27678064 DOI: 10.1016/j.fct.2016.09.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Revised: 09/05/2016] [Accepted: 09/23/2016] [Indexed: 10/20/2022]
Abstract
Tributyltin (TBT) is one of the most widely used organotin biocides, which has severe endocrine-disrupting effects on marine species and mammals. Given that TBT accumulates at higher levels in the liver than in any other organ, and it acts mainly as a hepatotoxic agent, it is important to clearly delineate the hepatotoxicity of TBT. However, most of the available studies on TBT have focused on observations at the cellular level, while studies at the level of genes and proteins are limited; therefore, the molecular mechanisms of TBT-induced hepatotoxicity remains largely unclear. In the present study, we applied a toxicogenomic approach to investigate the effects of TBT on gene expression in the human normal liver cell line HL7702. Gene expression profiling identified the apoptotic pathway as the major cause of hepatotoxicity induced by TBT. Flow cytometry assays confirmed that medium- and high-dose TBT treatments significantly increased the number of apoptotic cells, and more cells underwent late apoptosis in the high-dose TBT group. The genes encoding heat shock proteins (HSPs), kinases and tumor necrosis factor receptors mediated TBT-induced apoptosis. These findings revealed novel molecular mechanisms of TBT-induced hepatotoxicity, and the current microarray data may also provide clues for future studies.
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Affiliation(s)
- Mi Zhou
- Department of Preventive Medicine, School of Medicine, Ningbo University, Ningbo, Zhejiang Province, China
| | - Mei Feng
- Department of Preventive Medicine, School of Medicine, Ningbo University, Ningbo, Zhejiang Province, China
| | - Ling-Ling Fu
- Department of Preventive Medicine, School of Medicine, Ningbo University, Ningbo, Zhejiang Province, China
| | - Lin-Dan Ji
- Department of Biochemistry, School of Medicine, Ningbo University, Ningbo, Zhejiang Province, China; Zhejiang Provincial Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, Zhejiang Province, China
| | - Jin-Shun Zhao
- Department of Preventive Medicine, School of Medicine, Ningbo University, Ningbo, Zhejiang Province, China; Zhejiang Provincial Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, Zhejiang Province, China
| | - Jin Xu
- Department of Preventive Medicine, School of Medicine, Ningbo University, Ningbo, Zhejiang Province, China; Zhejiang Provincial Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, Zhejiang Province, China.
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