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Wang L, Zhong W, Liu B, Pranantyo D, Chan-Park MB. Cationic Carbon Monoxide-Releasing Polymers as Antimicrobial and Antibiofilm Agents by the Synergetic Activity. ACS APPLIED MATERIALS & INTERFACES 2023; 15:41772-41782. [PMID: 37609827 DOI: 10.1021/acsami.3c02898] [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] [Indexed: 08/24/2023]
Abstract
Recent studies indicate that carbon monoxide-releasing molecules (CORMs), a class of organometallic compounds, exert antibacterial activities through the delivery of carbon monoxide (CO) molecules. We developed a new-class CO-delivery system by conjugating classical low-molecular-weight CORMs (i.e., [Ru(CO)3Cl2]2 and Mn(CO)5Br) onto a positively charged carrier, polyimidazolium (PIM), giving cationic CO-releasing polymers Ru@PIM and Mn@PIM, respectively. Compared with low-molecular-weight CORMs, our polymeric CO vehicles showed improved water solubility, reduced cytotoxicity, significantly extended CO-releasing duration, and enhanced antimicrobial ability against both planktonic and biofilm microorganisms. Ru@PIM and Mn@PIM inhibited the growth of a broad spectrum of free Gram-positive and Gram-negative bacteria as well as fungus with the lowest minimum inhibitory concentration (MIC) at 8 μg/mL. They were effective in preventing pathogenic Pseudomonas aeruginosa biofilm formation with biofilm reduction by more than 92% at 16 μg/mL and 99% at 32 μg/mL. They also demonstrated potent dispersal efficacy on recalcitrant well-established biofilms through a synergetic activity with a biofilm log10 reduction of 2.5-3.2 ≥ 64 μg/mL and nearly 2.0 at the concentration of as low as 16 μg/mL. This CO-releasing system may retain long-time antimicrobial ability after the complete release of CO molecules owing to the cationic structure. The novel CO-releasing polymers have great potential as antimicrobial and antibiofilm agents in biomedical applications.
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Affiliation(s)
- Liping Wang
- Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Wenbin Zhong
- Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Bo Liu
- Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Dicky Pranantyo
- Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Mary B Chan-Park
- Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
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Srivastava A, Tomar B, Sharma D, Rath SK. Mitochondrial dysfunction and oxidative stress: Role in chronic kidney disease. Life Sci 2023; 319:121432. [PMID: 36706833 DOI: 10.1016/j.lfs.2023.121432] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/18/2023] [Accepted: 01/18/2023] [Indexed: 01/26/2023]
Abstract
Chronic kidney disease (CKD) is associated with a variety of distinct disease processes that permanently change the function and structure of the kidney across months or years. CKD is characterized as a glomerular filtration defect or proteinuria that lasts longer than three months. In most instances, CKD leads to end-stage kidney disease (ESKD), necessitating kidney transplantation. Mitochondrial dysfunction is a typical response to damage in CKD patients. Despite the abundance of mitochondria in the kidneys, variations in mitochondrial morphological and functional characteristics have been associated with kidney inflammatory responses and injury during CKD. Despite these variations, CKD is frequently used to define some classic signs of mitochondrial dysfunction, including altered mitochondrial shape and remodeling, increased mitochondrial oxidative stress, and a marked decline in mitochondrial biogenesis and ATP generation. With a focus on the most significant developments and novel understandings of the involvement of mitochondrial remodeling in the course of CKD, this article offers a summary of the most recent advances in the sources of procured mitochondrial dysfunction in the advancement of CKD. Understanding mitochondrial biology and function is crucial for developing viable treatment options for CKD.
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Affiliation(s)
- Anjali Srivastava
- Division of Toxicology and Experimental Medicine, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Bhawna Tomar
- Division of Toxicology and Experimental Medicine, CSIR-Central Drug Research Institute, Lucknow 226031, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Divyansh Sharma
- Division of Toxicology and Experimental Medicine, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Srikanta Kumar Rath
- Division of Toxicology and Experimental Medicine, CSIR-Central Drug Research Institute, Lucknow 226031, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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Robert B, Subramaniam S. Gasotransmitter-Induced Therapeutic Angiogenesis: A Biomaterial Prospective. ACS OMEGA 2022; 7:45849-45866. [PMID: 36570231 PMCID: PMC9773187 DOI: 10.1021/acsomega.2c05599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 11/24/2022] [Indexed: 06/17/2023]
Abstract
Gasotransmitters such as NO, H2S, and CO have emerged as key players in the regulation of various pathophysiological functions, prompting the development of gas therapy for various pathogeneses. Deficient production of gasotransmitters has been linked to various diseases such as hypertension, endothelial dysfunction, myocardial infarction, ischemia, and impaired wound healing, as they are involved in the regulatory action of angiogenesis. A better understanding of the regulatory mechanisms has given new hope to address the vascular impairment caused by the breakthroughs in gasotransmitters as therapeutics. However, the unstable nature and poor target specificity of gas donors limit the full efficacy of drugs. In this regard, biomaterials that possess excellent biocompatibility and porosity are ideal drug carriers to deliver the gas transmitters in a tunable manner for therapeutic angiogenesis. This review article provides a comprehensive discussion of biomaterial-based gasotransmitter delivery approaches for therapeutic angiogenesis. The critical role of gasotransmitters in modulating angiogenesis during tissue repair as well as their challenges and future directions are demonstrated.
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Affiliation(s)
- Becky Robert
- Biomaterials
and Bioprocess Laboratory, Department of Microbial Biotechnology, Bharathiar University, Coimbatore 641046, India
| | - Sadhasivam Subramaniam
- Biomaterials
and Bioprocess Laboratory, Department of Microbial Biotechnology, Bharathiar University, Coimbatore 641046, India
- Department
of Extension and Career Guidance, Bharathiar
University, Coimbatore 641046, India
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Li J, Han Q, Chen H, Liu T, Song J, Hou M, Wei L, Song H. Carbon Monoxide-Releasing Molecule-3 Enhances Osteogenic Differentiation of Rat Bone Marrow Mesenchymal Stem Cells via miR-195-5p/Wnt3a Pathway. Drug Des Devel Ther 2022; 16:2101-2117. [PMID: 35812136 PMCID: PMC9259429 DOI: 10.2147/dddt.s367277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 06/25/2022] [Indexed: 11/23/2022] Open
Abstract
Purpose Bone marrow-derived mesenchymal stem cells (BMSCs) are hopeful in promoting bone regeneration as their pluripotency in differentiation. Our previous study showed that carbon monoxide-releasing molecule-3 (CORM-3) increased the osteogenic differentiation of rat BMSCs in vitro. However, the mechanism remained unclear. MicroRNAs (miRNAs) play a very important role in modulating the osteogenic differentiation of BMSCs. Therefore, we researched the miRNAs involved in CORM-3-stimulated osteogenic differentiation. Methods The CORM-3-stimulated osteogenic differentiation of rat BMSCs was further studied in vivo. Based on the gene sequencing experiment, the rat BMSCs were transfected with miR-195-5p mimics and inhibitor, pcDNA3.1-Wnt3a and Wnt3a siRNA. The osteogenic differentiation of rat BMSCs was measured by quantitative real-time polymerase chain reaction, Western blot and alizarin red staining. Additionally, the targeting relationship between miR-195-5p and Wnt3a was confirmed by the dual-luciferase assay. Results MiR-195-5p was down-expressed during the CORM-3-stimulated osteogenic differentiation of rat BMSCs. CORM-3-stimulated osteogenic differentiation of rat BMSCs was inhibited with miR-195-5p overexpression, evidenced by significantly reduced mRNA and protein expressions of runt-related transcription factor 2 and osteopontin, and matrix mineralization demonstrated. On the contrary, the osteogenic differentiation was enhanced with inhibition of miR-195-5p. CORM-3-stimulated osteogenic differentiation of rat BMSCs was increased by overexpression of Wnt3a, while the opposite was observed in the Wnt3a-deficient cells. Moreover, the decreased osteogenic differentiation capacity by increased expression of miR-195-5p was rescued by Wnt3a overexpression, showing miR-195-5p directly targeted Wnt3a. Conclusion These results demonstrate that CORM-3 promoted osteogenic differentiation of rat BMSCs via miR-195-5p/Wnt3a, which bodes well for the application of CORM-3 in the treatment of periodontal disease and other bone-defect diseases.
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Affiliation(s)
- Jingyuan Li
- School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, People’s Republic of China
| | - Qingbin Han
- Department of Oral and Maxillofacial Surgery, Shandong Linyi People’s Hospital, Linyi, People’s Republic of China
| | - Hui Chen
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, People’s Republic of China
| | - Tingting Liu
- School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, People’s Republic of China
| | - Jiahui Song
- School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, People’s Republic of China
| | - Meng Hou
- School of Stomatology, Jining Medical College, Jining, People’s Republic of China
| | - Lingling Wei
- School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, People’s Republic of China
| | - Hui Song
- School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, People’s Republic of China
- Correspondence: Hui Song, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, 250012, People’s Republic of China, Tel +86-531-88382912, Fax +86-531-88382923, Email
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Kwong AM, Luke PPW, Bhattacharjee RN. Carbon monoxide mechanism of protection against renal ischemia and reperfusion injury. Biochem Pharmacol 2022; 202:115156. [PMID: 35777450 DOI: 10.1016/j.bcp.2022.115156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 06/22/2022] [Accepted: 06/23/2022] [Indexed: 12/20/2022]
Abstract
Carbon monoxide is quickly moving past its historic label as a molecule once feared, to a therapeutic drug that modulates inflammation. The development of carbon monoxide releasing molecules and utilization of heme oxygenase-1 inducers have shown carbon monoxide to be a promising therapy in reducing renal ischemia and reperfusion injury and other inflammatory diseases. In this review, we will discuss the developments and application of carbon monoxide releasing molecules in renal ischemia and reperfusion injury, and transplantation. We will review the anti-inflammatory mechanisms of carbon monoxide in respect to mitigating apoptosis, suppressing dendritic cell maturation and signalling, inhibiting toll-like receptor activation, promoting anti-inflammatory responses, and the effects on renal vasculature.
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Affiliation(s)
- Aaron M Kwong
- Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Patrick P W Luke
- Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada; Department of Surgery, London Health Sciences Centre, Canada; Matthew Mailing Centre for Translational Transplantation Studies, Canada.
| | - Rabindra N Bhattacharjee
- Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada; Department of Surgery, London Health Sciences Centre, Canada; Matthew Mailing Centre for Translational Transplantation Studies, Canada.
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Abstract
Since the industrial revolution, air pollution has become a major problem causing several health problems involving the airways as well as the cardiovascular, reproductive, or neurological system. According to the WHO, about 3.6 million deaths every year are related to inhalation of polluted air, specifically due to pulmonary diseases. Polluted air first encounters the airways, which are a major human defense mechanism to reduce the risk of this aggressor. Air pollution consists of a mixture of potentially harmful compounds such as particulate matter, ozone, carbon monoxide, volatile organic compounds, and heavy metals, each having its own effects on the human body. In the last decades, a lot of research investigating the underlying risks and effects of air pollution and/or its specific compounds on the airways, has been performed, involving both in vivo and in vitro experiments. The goal of this review is to give an overview of the recent data on the effects of air pollution on healthy and diseased airways or models of airway disease, such as asthma or chronic obstructive pulmonary disease. Therefore, we focused on studies involving pollution and airway symptoms and/or damage both in mice and humans.
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CO-Releasing Molecule-2 Prevents Acute Kidney Injury through Suppression of ROS-Fyn-ER Stress Signaling in Mouse Model. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:9947772. [PMID: 34326922 PMCID: PMC8277502 DOI: 10.1155/2021/9947772] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 06/11/2021] [Accepted: 06/21/2021] [Indexed: 12/15/2022]
Abstract
Acute kidney injury (AKI) most commonly appears in critically ill patients in hospitals. AKI is characterized as a quick deterioration of kidney function and has recently been identified to be tightly interlinked with chronic kidney diseases. The emerging major mediators of AKI include oxidative stress and endoplasmic reticulum (ER) stress. Carbon monoxide (CO) attenuates oxidative stress and ER stress in various cells, while Fyn, a member of the Src kinase family, is activated by oxidative stress and contributes to ER stress in skeletal muscle. Considering these, the objective of the current research was to determine (i) the involvement of Fyn in ER stress-mediated AKI and (ii) the effect of CO-releasing molecule-2 (CORM2) on reactive oxygen species- (ROS-) Fyn-ER stress-mediated AKI. Pretreatment with CORM2 (30 mg/kg) efficiently inhibited LPS (30 mg/kg)-induced oxidative stress, inflammation, and cellular apoptosis during AKI in C57BL/6J mice. Also, CORM2 efficiently suppressed the activation of Fyn and ER stress in AKI mice. Consistently, pretreatment with CORM2 inhibited oxidative stress, Fyn activation, ER stress, inflammation, and apoptosis in LPS- or H2O2-stimulated proximal epithelial tubular cells. Fyn inhibition using siRNA or an inhibitor (PP2) significantly attenuated ER stress responses in the cells. These data suggest that CORM2 may become a potential treatment option against ROS-Fyn-ER stress-mediated AKI.
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Campos EMN, Rodrigues LD, Oliveira LF, Dos Santos JCC. Dementia and cognitive impairment in adults as sequels of HSV-1-related encephalitis: a review. Dement Neuropsychol 2021; 15:164-172. [PMID: 34345357 PMCID: PMC8283880 DOI: 10.1590/1980-57642021dn15-020002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Accepted: 02/01/2021] [Indexed: 11/24/2022] Open
Abstract
Considering the variety of mechanisms of Herpes simplex virus (HSV-1) contamination and its broad invasive potential of the nervous system, a life-long latent infection is established. Infected adult individuals may be susceptible to viral reactivation when under the influence of multiple stressors, especially regarding immunocompromised patients. This guides a series of neuroinflammatory events on the cerebral cortex, culminating, rarely, in encephalitis and cytotoxic / vasogenic brain edema. A sum of studies of such processes provides an explanation, even though not yet completely clarified, on how the clinical evolution to cognitive impairment and dementia might be enabled. In addition, it is of extreme importance to recognize the current dementia and cognitive deficit worldwide panorama. The aim of this literature review is to elucidate the available data upon the pathophysiology of HSV-1 infection as well as to describe the clinical panorama of the referred afflictions.
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Affiliation(s)
| | - Laís Damasceno Rodrigues
- Neuroscience Laboratory, Department of Neurology and Neurosurgery, Federal University of São Paulo, São Paulo, SP, Brazil
| | - Leandro Freitas Oliveira
- Neuroscience Laboratory, Department of Neurology and Neurosurgery, Federal University of São Paulo, São Paulo, SP, Brazil
| | - Júlio César Claudino Dos Santos
- Neuroscience Laboratory, Department of Neurology and Neurosurgery, Federal University of São Paulo, São Paulo, SP, Brazil.,Faculty of Medicine, Christus University Center, Fortaleza, CE, Brazil
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Huang KC, Li JC, Wang SM, Cheng CH, Yeh CH, Lin LS, Chiu HY, Chang CY, Chuu JJ. The effects of carbon monoxide releasing molecules on paraquat-induced pulmonary interstitial inflammation and fibrosis. Toxicology 2021; 456:152750. [PMID: 33737140 DOI: 10.1016/j.tox.2021.152750] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 02/10/2021] [Accepted: 03/12/2021] [Indexed: 01/07/2023]
Abstract
Paraquat, an herbicide used extensively worldwide, can cause severe toxicity in humans and animals, leading to irreversible, lethal lung fibrosis. The potential of CO-releasing molecules (CORMs), substances that release CO (Carbon monoxide) within animal tissues, for treating paraquat-induced ROS generation and inflammation is investigated here. Our results show that the fast CO releaser CORM-3 (4-20 μM) acts as a potential scavenger of free radicals and decreases fibrosis progression by inhibiting paraquat-induced overexpression of connective tissue growth factor and angiotensin II in MRC-5 cells. The slow CO releaser CORM-A1 (5 mg/kg) clearly decreased expression of the lung profibrogenic cytokines COX-2, TNF-α, and α-SMA and serum hydroxyproline, resulting in a lower mortality rate in paraquat-treated mice. Mice treated with higher-dose CORM-A1 (10 mg/kg) had relatively intact lung lobes and fewer fibrotic patches by gross observation, with less collagen deposition, mesangial matrix accumulation, and pulmonary fibrosis resulting from the mitigation of TGF-β overexpression. In conclusion, our data demonstrate for the first time that CORM-A1 alleviated the development of the fibrotic process and improved survival rate in mice exposed to PQ, would be an attractive therapeutic approach to attenuate the progression of pulmonary fibrosis following PQ exposure.
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Affiliation(s)
- Kuo-Ching Huang
- Division of Nephrology, Department of Internal Medicine, Chi-Mei Hospital, Liouying, Tainan, Taiwan; Department of Environmental and Occupational Health, National Cheng Kung University, College of Medicine, Tainan, Taiwan
| | - Jui-Chen Li
- Pharmacy Department, Wei-Gong Memorial Hospital, Miaoli, Taiwan
| | - Shu-Mei Wang
- Department of Life Science, College of Science and Engineering, Fu Jen Catholic University, New Taipei, Taiwan
| | - Chia-Hui Cheng
- Department of Biotechnology and Food Technology, College of Engineering, Southern Taiwan University of Science and Technology, Tainan, Taiwan
| | - Chun-Hsiang Yeh
- Department of Biotechnology and Food Technology, College of Engineering, Southern Taiwan University of Science and Technology, Tainan, Taiwan
| | - Li-Syun Lin
- Department of Biotechnology and Food Technology, College of Engineering, Southern Taiwan University of Science and Technology, Tainan, Taiwan
| | - Hsin-Yi Chiu
- Department of Biotechnology and Food Technology, College of Engineering, Southern Taiwan University of Science and Technology, Tainan, Taiwan
| | - Chia-Yu Chang
- Department of Neurology, Chi-Mei Medical Center, Tainan, Taiwan; Center for General Education, Southern Taiwan University of Science and Technology, Tainan, Taiwan.
| | - Jiunn-Jye Chuu
- Pharmacy Department, Wei-Gong Memorial Hospital, Miaoli, Taiwan; Department of Biotechnology and Food Technology, College of Engineering, Southern Taiwan University of Science and Technology, Tainan, Taiwan.
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Lei J, Paul J, Wang Y, Gupta M, Vang D, Thompson S, Jha R, Nguyen J, Valverde Y, Lamarre Y, Jones MK, Gupta K. Heme Causes Pain in Sickle Mice via Toll-Like Receptor 4-Mediated Reactive Oxygen Species- and Endoplasmic Reticulum Stress-Induced Glial Activation. Antioxid Redox Signal 2021; 34:279-293. [PMID: 32729340 PMCID: PMC7821434 DOI: 10.1089/ars.2019.7913] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Aims: Lifelong pain is a hallmark feature of sickle cell disease (SCD). How sickle pathobiology evokes pain remains unknown. We hypothesize that increased cell-free heme due to ongoing hemolysis activates toll-like receptor 4 (TLR4), leading to the formation of reactive oxygen species (ROS) and endoplasmic reticulum (ER) stress. Together, these processes lead to spinal microglial activation and neuroinflammation, culminating in acute and chronic pain. Results: Spinal heme levels, TLR4 transcripts, oxidative stress, and ER stress were significantly higher in sickle mice than controls. In vitro, TLR4 inhibition in spinal cord microglial cells attenuated heme-induced ROS and ER stress. Heme treatment led to a time-dependent increase in the characteristic features of sickle pain (mechanical and thermal hyperalgesia) in both sickle and control mice; this effect was absent in TLR4-knockout sickle and control mice. TLR4 deletion in sickle mice attenuated chronic and hypoxia/reoxygenation (H/R)-evoked acute hyperalgesia. Sickle mice treated with the TLR4 inhibitor resatorvid; selective small-molecule inhibitor of TLR4 (TAK242) had significantly reduced chronic hyperalgesia and had less severe H/R-evoked acute pain with quicker recovery. Notably, reducing ER stress with salubrinal ameliorated chronic hyperalgesia in sickle mice. Innovation: Our findings demonstrate the causal role of free heme in the genesis of acute and chronic sickle pain and suggest that TLR4 and/or ER stress are novel therapeutic targets for treating pain in SCD. Conclusion: Heme-induced microglial activation via TLR4 in the central nervous system contributes to the initiation and maintenance of sickle pain via ER stress in SCD. Antioxid. Redox Signal. 34, 279-293.
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Affiliation(s)
- Jianxun Lei
- Vascular Biology Center, Division of Hematology, Oncology & Transplantation, Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Jinny Paul
- Vascular Biology Center, Division of Hematology, Oncology & Transplantation, Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Ying Wang
- Vascular Biology Center, Division of Hematology, Oncology & Transplantation, Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Mihir Gupta
- Department of Neurosurgery, University of California San Diego, La Jolla, California, USA
| | - Derek Vang
- Vascular Biology Center, Division of Hematology, Oncology & Transplantation, Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Susan Thompson
- Vascular Biology Center, Division of Hematology, Oncology & Transplantation, Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Ritu Jha
- Vascular Biology Center, Division of Hematology, Oncology & Transplantation, Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Julia Nguyen
- Vascular Biology Center, Division of Hematology, Oncology & Transplantation, Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Yessenia Valverde
- Vascular Biology Center, Division of Hematology, Oncology & Transplantation, Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Yann Lamarre
- Vascular Biology Center, Division of Hematology, Oncology & Transplantation, Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Michael K Jones
- Division of Hematology/Oncology, Department of Medicine, University of California, Irvine, Irvine, California, USA.,Southern California Institute for Research and Education, Long Beach, California, USA
| | - Kalpna Gupta
- Vascular Biology Center, Division of Hematology, Oncology & Transplantation, Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA.,Division of Hematology/Oncology, Department of Medicine, University of California, Irvine, Irvine, California, USA.,Southern California Institute for Research and Education, Long Beach, California, USA
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Han L, Ma Q, Yu J, Gong Z, Ma C, Xu Y, Deng G, Wu X. Autophagy plays a protective role during Pseudomonas aeruginosa-induced apoptosis via ROS-MAPK pathway. Innate Immun 2020; 26:580-591. [PMID: 32878509 PMCID: PMC7556189 DOI: 10.1177/1753425920952156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 07/18/2020] [Accepted: 08/03/2020] [Indexed: 12/13/2022] Open
Abstract
Pseudomonas aeruginosa infection can induce alveolar macrophage apoptosis and autophagy, which play a vital role in eliminating pathogens. These two processes are usually not independent. Recently, autophagy has been found to interact with apoptosis during pathogen infections. Nevertheless, the role of autophagy in P. aeruginosa-infected cell apoptosis is unclear. In this study, we explored the impact of P. aeruginosa infection on autophagy and apoptosis in RAW264.7 cells. The autophagy activator rapamycin was used to stimulate autophagy and explore the role of autophagy on apoptosis in P. aeruginosa-infected RAW264.7 cells. The results indicated that P. aeruginosa infection induced autophagy and apoptosis in RAW264.7 cells, and that rapamycin could suppress P. aeruginosa-induced apoptosis by regulating the expression of apoptosis-related proteins. In addition, rapamycin scavenged the cellular reactive oxygen species (ROS) and diminished p-JNK, p-ERK1/2 and p-p38 expression of MAPK pathways in RAW264.7 cells infected with P. aeruginosa. In conclusion, the promotion of autophagy decreased P. aeruginosa-induced ROS accumulation and further attenuated the apoptosis of RAW264.7 cells through MAPK pathway. These results provide novel insights into host-pathogen interactions and highlight a potential role of autophagy in eliminating P. aeruginosa.
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Affiliation(s)
- Lu Han
- Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in western China, NingXia University, NingXia, Yinchuan, China
- School of Life Science, NingXia University, NingXia, Yinchuan, China
| | - Qinmei Ma
- Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in western China, NingXia University, NingXia, Yinchuan, China
- School of Life Science, NingXia University, NingXia, Yinchuan, China
| | - Jialin Yu
- Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in western China, NingXia University, NingXia, Yinchuan, China
- School of Life Science, NingXia University, NingXia, Yinchuan, China
| | - Zhaoqian Gong
- Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in western China, NingXia University, NingXia, Yinchuan, China
- School of Life Science, NingXia University, NingXia, Yinchuan, China
| | - Chenjie Ma
- Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in western China, NingXia University, NingXia, Yinchuan, China
- School of Life Science, NingXia University, NingXia, Yinchuan, China
| | - Yanan Xu
- Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in western China, NingXia University, NingXia, Yinchuan, China
- School of Life Science, NingXia University, NingXia, Yinchuan, China
| | - Guangcun Deng
- Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in western China, NingXia University, NingXia, Yinchuan, China
- School of Life Science, NingXia University, NingXia, Yinchuan, China
| | - Xiaoling Wu
- Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in western China, NingXia University, NingXia, Yinchuan, China
- School of Life Science, NingXia University, NingXia, Yinchuan, China
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Vo TTT, Lee CW, Wu CZ, Liu JF, Lin WN, Chen YL, Hsu LF, Tsai MH, Lee IT. Surfactin from Bacillus subtilis attenuates ambient air particulate matter-promoted human oral cancer cells metastatic potential. J Cancer 2020; 11:6038-6049. [PMID: 32922544 PMCID: PMC7477423 DOI: 10.7150/jca.48296] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Accepted: 08/06/2020] [Indexed: 12/13/2022] Open
Abstract
Recently, many studies have indicated that ambient air particulate matter (PM) can increase the risk of oral cancer. The most common malignant tumor in the oral cavity is oral squamous cell carcinoma (OSCC). Usually, cancer cell migration/invasion is the most important cause of cancer mortality. Matrix metalloproteinase-2 (MMP-2) and MMP-9 have been shown to play important roles in regulating metastasis and the tumor microenvironment. Here, we studied the anti-cancer effects of surfactin, a cyclic lipopeptide generated by Bacillus subtilis, on cancer cell migration and invasion. Surfactin suppressed PM-promoted cell migration and invasion and colony formation of SCC4 and SCC25 human oral squamous cell carcinoma cell lines. We observed that PM induced MMP-2 and MMP-9 expression, which was inhibited by surfactin. Transfection with p65, p50, c-Jun, c-Fos, p85, p110, Akt, mammalian target of rapamycin (mTOR), or interleukin-6 (IL-6) siRNA markedly inhibited PM-induced MMP-2 and MMP-9 expression. Moreover, surfactin could reduce Akt, mTOR, p65, and c-Jun activation and IL-6 secretion induced by PM. Finally, we proved that transfection with Akt, p65, or c-Jun siRNA significantly inhibited PM-induced IL-6 release. Taken together, these results suggest that surfactin functions as a suppressor of PM-induced MMP2/9-dependent oral cancer cell migration and invasion by inhibiting the activation of phosphoinositide 3-kinase (PI3K)/Akt/mTOR and PI3K/Akt/nuclear factor-κB (NF-κB) and activator protein-1 (AP-1)/IL-6 signaling pathways.
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Affiliation(s)
- Thi Thuy Tien Vo
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chiang-Wen Lee
- Department of Orthopaedic Surgery, Chang Gung Memorial Hospital, Puzi City, Chiayi County 61363, Taiwan
- Department of Nursing, Division of Basic Medical Sciences, and Chronic Diseases and Health Promotion Research Center, and Research Center for Chinese Herbal Medicine, Chang Gung University of Science and Technology, Puzi City, Chiayi County 61363, Taiwan
- Department of Safety Health and Environmental Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
- College of Medicine, Chang Gung University, Guishan Dist., Taoyuan City 33303, Taiwan
| | - Ching-Zong Wu
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
| | - Ju-Fang Liu
- School of Oral Hygiene, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
| | - Wei-Ning Lin
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Yuh-Lien Chen
- Department of Anatomy and Cell Biology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Lee-Fen Hsu
- Department of Respiratory Care, Chang Gung University of Science and Technology, Puzi City, Chiayi County 613, Taiwan
- Division of Neurosurgery, Department of Surgery, Chang Gung Memorial Hospital, Puzi City, Chiayi County 613, Taiwan
| | - Ming-Horng Tsai
- Department of Pediatrics, Division of Pediatric Hematology/Oncology and Neonatology, Yunlin Chang Gung Memorial Hospital, Yunlin, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - I-Ta Lee
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
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13
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Analysis on the Temporal Distribution Characteristics of Air Pollution and Its Impact on Human Health under the Noticeable Variation of Residents' Travel Behavior: A Case of Guangzhou, China. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17144947. [PMID: 32659942 PMCID: PMC7399817 DOI: 10.3390/ijerph17144947] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 07/07/2020] [Indexed: 12/14/2022]
Abstract
During the large-scale outbreak of COVID-19 in China, the Chinese government adopted multiple measures to prevent the epidemic. The consequence was that a sudden variation in residents' travel behavior took place. In order to better evaluate the temporal distribution of air pollution, and to effectively explore the influence of human activities on air quality, especially under the special situation, this study was conducted based on the real data from a case city in China from this new perspective. Two case scenarios were constructed, in which the research before the changes of residents' travel behavior was taken as case one, and the research after the changes in residents' travel behavior as case two. The hourly real-time concentrations of PM2.5, PM10, SO2, NO2, CO and O3 that have passed the augmented Dickey-Fuller (ADF) test were employed as a data source. A series of detailed studies have been carried out using the correlation method, entropy weight method and the Air Quality Index (AQI) calculation method. Additionally, the research found that the decrease rate of NO2 concentration is 61.05%, and the decrease rate of PM10 concentration is 53.68%. On the contrary, the average concentration of O3 has increased significantly, and its growth rate has reached to 9.82%. Although the air quality in the first week with fewer travels was in the excellent category, and chief pollutant (CP), as well as excessive pollutant (EP), were not found, as traffic volume increased, it became worse in the second and third weeks. In addition to that, special attention should still be paid to the development trend of O3, as its average hourly concentration has increased. The findings of this study will have some guiding significance for the study of air pollution prevention, cleaner production, and indoor environmental safety issues, especially for the study of abnormal traffic environments where residents' travel behaviors have changed significantly.
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14
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Cheng CY, Vo TTT, Lin WN, Huang HW, Chuang CC, Chu PM, Lee IT. Nrf2/HO-1 partially regulates cytoprotective effects of carbon monoxide against urban particulate matter-induced inflammatory responses in oral keratinocytes. Cytokine 2020; 133:155185. [PMID: 32615411 DOI: 10.1016/j.cyto.2020.155185] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 06/22/2020] [Accepted: 06/23/2020] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Exposure to airborne particulate matter (PM) increases the proportion of oral inflammatory diseases. During the formation of inflammatory conditions, the nucleotide-binding domain and leucine-rich repeat protein 3 (NLRP3) inflammasome activation plays an important regulator. Carbon monoxide (CO) arising from heme degradation, catalyzed particularly by heme oxygenase-1 (HO-1), has been shown to own cytoprotective effects including anti-inflammation and antioxidant. Here, we determined the novel mechanisms of carbon monoxide releasing molecule-2 (CORM-2) on PM-induced inflammatory responses in human oral keratinocytes (HOKs). METHODS The effects of CORM-2 on the expression of various inflammatory proteins induced by PM were determined by Western blot, real-time PCR, promoter assay, and ELISA. The involvement of signaling molecules in these responses was studied by using the selective pharmacological inhibitors and siRNAs. RESULTS We proved that PM enhanced C-reactive protein (CRP) levels, NLRP3 inflammasome and caspase-1 activation, and IL-1β release, which were reduced by preincubation with CORM-2. Transfection with PKCα siRNA and preincubation with the ROS scavenger (N-acetyl-cysteine, NAC), an inhibitor of NADPH oxidase (diphenyleneiodonium, DPI), or the mitochondria-specific superoxide scavenger (MitoTEMPO) inhibited PM-mediated inflammatory responses. In addition, PM-regulated PKCα and NADPH oxidase activation as well as NADPH oxidase- and mitochondria-derived ROS generation were inhibited by CORM-2, but not inactivate CORM-2 (iCORM-2) pretreatment. At the end, we confirmed that CORM-2 improved PM-induced inflammatory responses via the induction of Nrf2 activation and HO-1 expression. CONCLUSION We suggest that CORM-2 inhibits PM-induced inflammatory responses in HOKs via the inhibition of PKCα/ROS/NLRP3 inflammasome activation combined with the induction of Nrf2/HO-1 expression.
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Affiliation(s)
- Ching-Yi Cheng
- Graduate Institute of Health Industry Technology, Research Center for Chinese Herbal Medicine and Research Center for Food and Cosmetic Safety, Chang Gung University of Science and Technology, Taoyuan, Taiwan; Department of Pulmonary Infection and Immunology, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - Thi Thuy Tien Vo
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
| | - Wei-Ning Lin
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City 242, Taiwan
| | - Hsiang-Wei Huang
- School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chu-Chun Chuang
- International MS/PhD Program in Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Pei-Ming Chu
- School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan
| | - I-Ta Lee
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan.
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15
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Zheng G, Zheng F, Luo Z, Ma H, Zheng D, Xiang G, Xu C, Zhou Y, Wu Y, Tian N, Wu Y, Zhang T, Ni W, Wang S, Xu H, Zhang X. CO-Releasing Molecule (CORM)-3 Ameliorates Spinal Cord-Blood Barrier Disruption Following Injury to the Spinal Cord. Front Pharmacol 2020; 11:761. [PMID: 32581781 PMCID: PMC7287126 DOI: 10.3389/fphar.2020.00761] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 05/07/2020] [Indexed: 01/01/2023] Open
Abstract
Spinal cord injury (SCI) is a clinical tough neurological problem without efficient cure currently. Blood-spinal cord barrier (BSCB) interruption is not only a crucial pathological feature for SCI process but is a possible target for future SCI treatments; however, few treatments have been developed to intervene BSCB. In the present study, we intravenously injected CO-releasing molecule3 (CORM-3), a classical exogenous CO donor, to the rats experiencing SCI and assessed its protection on BSCB integrity in rats. Our results demonstrated that the exogenous increasing of CO by CORM-3 blocked the tight junction (TJ) protein degeneration and neutrophils infiltration, subsequently suppressed the BSCB damage and improved the motor recovery after SCI. And we certified that the CO-induced down-regulation of MMP-9 expression and activity in neutrophil might be associated with the NF-κB signaling. Taken together, our study indicates that CO-releasing molecule (CORM)-3 ameliorates BSCB after spinal cord injury.
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Affiliation(s)
- Gang Zheng
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthpaedics, Wenzhou, China
| | - Fanghong Zheng
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthpaedics, Wenzhou, China.,The Second School of Medicine, Wenzhou Medical University, Wenzhou, China
| | - Zucheng Luo
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthpaedics, Wenzhou, China
| | - Haiwei Ma
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthpaedics, Wenzhou, China
| | - Dongdong Zheng
- Department of Neurosurgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Guangheng Xiang
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthpaedics, Wenzhou, China
| | - Cong Xu
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthpaedics, Wenzhou, China
| | - Yifei Zhou
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthpaedics, Wenzhou, China.,The Second School of Medicine, Wenzhou Medical University, Wenzhou, China
| | - Yaosen Wu
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthpaedics, Wenzhou, China.,The Second School of Medicine, Wenzhou Medical University, Wenzhou, China
| | - Naifeng Tian
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthpaedics, Wenzhou, China.,The Second School of Medicine, Wenzhou Medical University, Wenzhou, China
| | - Yan Wu
- Department of Orthopaedics, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Wenzhou, China
| | - Tan Zhang
- Department of Orthopaedics, Shaoxing People's Hospital, Shaoxing, Wenzhou, China
| | - Wenfei Ni
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthpaedics, Wenzhou, China
| | - Sheng Wang
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthpaedics, Wenzhou, China.,The Second School of Medicine, Wenzhou Medical University, Wenzhou, China
| | - Huazi Xu
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthpaedics, Wenzhou, China.,The Second School of Medicine, Wenzhou Medical University, Wenzhou, China
| | - Xiaolei Zhang
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthpaedics, Wenzhou, China.,The Second School of Medicine, Wenzhou Medical University, Wenzhou, China.,Department of Orthopaedics, Chinese Orthopaedic Regenerative Medicine Society, Hangzhou, China
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16
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Wang L, Yin G, Guo Y, Zhao Y, Zhao M, Lai Y, Sui P, Shi T, Guo W, Huang Z. Variations in Oral Microbiota Composition Are Associated With a Risk of Throat Cancer. Front Cell Infect Microbiol 2019; 9:205. [PMID: 31334130 PMCID: PMC6618584 DOI: 10.3389/fcimb.2019.00205] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 05/27/2019] [Indexed: 12/23/2022] Open
Abstract
In this study, a next-generation sequencing strategy on 16S ribosomal RNA (16S rRNA) gene was employed to analyze 70 oral samples from 32 patients with throat cancer, nine patients with vocal cord polyp, and 29 healthy individuals (normal controls). Using this strategy, we demonstrated, for the first time, that the salivary microbiota of cancer patients were significantly different from those of patients with a polyp and healthy individuals. We observed that the beta diversity of the cancer group was divergent from both the normal and polyp groups, while alpha-diversity indices such as the Chao1 estimator (P = 8.1e-05), Simpson (P = 0.0045), and Shannon (P = 0.0071) were significantly reduced in cancer patients compared with patients containing a polyp and normal healthy individuals. Linear discriminant analysis (LDA) and Kruskal–Wallis test analyses and real-time quantitative polymerase chain reaction (qPCR) verification test revealed that the genera Aggregatibacter, Pseudomonas, Bacteroides, and Ruminiclostridium were significantly enriched in the throat cancer group compared with the vocal cord polyp and normal control groups (score value >2). Finally, diagnostic models based on putatively important constituent bacteria were constructed with 87.5% accuracy [area under the curve (AUC) = 0.875, 95% confidence interval (CI): 0.695–1]. In summary, in this study we characterized, for the first time, the oral microbiota of throat cancer patients without smoking history. We speculate that these results will help in the pathogenic mechanism and early diagnosis of throat cancer.
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Affiliation(s)
- Lili Wang
- Beijing Cheer Land Biotechnology Co., Ltd., CL Investment Group, Beijing, China
| | - Gaofei Yin
- Department of Otolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Ying Guo
- Beijing Cheer Land Biotechnology Co., Ltd., CL Investment Group, Beijing, China
| | - Yaqi Zhao
- Beijing Cheer Land Biotechnology Co., Ltd., CL Investment Group, Beijing, China
| | - Meng Zhao
- Beijing Cheer Land Biotechnology Co., Ltd., CL Investment Group, Beijing, China
| | - Yunyun Lai
- Beijing Cheer Land Biotechnology Co., Ltd., CL Investment Group, Beijing, China
| | - Pengcheng Sui
- Beijing Cheer Land Biotechnology Co., Ltd., CL Investment Group, Beijing, China
| | - Taiping Shi
- Beijing Cheer Land Biotechnology Co., Ltd., CL Investment Group, Beijing, China
| | - Wei Guo
- Department of Otolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Zhigang Huang
- Department of Otolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
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17
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Carbon monoxide releasing molecule-2 protects against particulate matter-induced lung inflammation by inhibiting TLR2 and 4/ROS/NLRP3 inflammasome activation. Mol Immunol 2019; 112:163-174. [PMID: 31153046 DOI: 10.1016/j.molimm.2019.05.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 05/08/2019] [Accepted: 05/24/2019] [Indexed: 12/12/2022]
Abstract
Exposure to airborne particulate matter (PM) not only causes lung inflammation and chronic respiratory diseases, but also increases the incidence and mortality of cardiopulmonary diseases. The nucleotide-binding domain and leucine-rich repeat protein 3 (NLRP3) inflammasome activation has been shown to play a critical role in the formation of many chronic disorders. On the other hand, carbon monoxide (CO) has been shown to possess anti-inflammatory and antioxidant effects in many tissues and organs. Here, we investigated the effects and mechanisms of carbon monoxide releasing molecule-2 (CORM-2) on PM-induced inflammatory responses in human pulmonary alveolar epithelial cells (HPAEpiCs). We found that PM induced C-reactive protein (CRP) expression, NLRP3 inflammasome activation, IL-1β secretion, and caspase-1 activation, which were inhibited by pretreatment with CORM-2. In addition, transfection with siRNA of Toll-like receptor 2 (TLR2) or TLR4 and pretreatment with an antioxidant (N-acetyl-cysteine, NAC), the inhibitor of NADPH oxidase (diphenyleneiodonium, DPI), or a mitochondria-specific superoxide scavenger (MitoTEMPO) reduced PM-induced inflammatory responses. CORM-2 also inhibited PM-induced NADPH oxidase activity and NADPH oxidase- and mitochondria-derived ROS generation. However, pretreatment with inactivate CORM-2 (iCORM-2) had no effects on PM-induced inflammatory responses. Finally, we showed that CORM-2 inhibited PM-induced CRP, NLRP3 inflammasome, and ASC protein expression in the lung tissues of mice and IL-1β levels in the serum of mice. PM-enhanced leukocyte count in bronchoalveolar lavage fluid in mice was reduced by CORM-2. The results of this study suggested a protective role of CORM-2 in PM-induced lung inflammation by inhibiting the TLR2 and TLR4/ROS-NLRP3 inflammasome-CRP axial.
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18
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Mechanisms of Blood-Brain Barrier Disruption in Herpes Simplex Encephalitis. J Neuroimmune Pharmacol 2018; 14:157-172. [PMID: 30456443 DOI: 10.1007/s11481-018-9821-6] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Accepted: 11/02/2018] [Indexed: 12/12/2022]
Abstract
Herpes simplex encephalitis (HSE) is often caused by infection with herpes simplex virus 1 (HSV-1), a neurotropic double-stranded DNA virus. HSE infection always impacts the temporal and frontal lobes or limbic system, leading to edema, hemorrhage, and necrotic changes in the brain parenchyma. Additionally, patients often exhibit severe complications following antiviral treatment, including dementia and epilepsy. HSE is further associated with disruptions to the blood-brain barrier (BBB), which consists of microvascular endothelial cells, tight junctions, astrocytes, pericytes, and basement membranes. Following an HSV-1 infection, changes in BBB integrity and permeability can result in increased movement of viruses, immune cells, and/or cytokines into the brain parenchyma. This leads to an enhanced inflammatory response in the central nervous system and further damage to the brain. Thus, it is important to protect the BBB from pathogens to reduce brain damage from HSE. Here, we discuss HSE and the normal structure and function of the BBB. We also discuss growing evidence indicating an association between BBB breakdown and the pathogenesis of HSE, as well as future research directions and potential new therapeutic targets. Graphical Abstract During herpes simplex encephalitis, the functions and structures of each composition of BBB have been altered by different factors, thus the permeability and integrity of BBB have been broken. The review aim to explore the potential mechanisms and factors in the process, probe the next research targets and new therapeutic targets.
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