1
|
Han T, Xu Y, Liu H, Sun L, Cheng X, Shen Y, Wei J. Function and Mechanism of Abscisic Acid on Microglia-Induced Neuroinflammation in Parkinson's Disease. Int J Mol Sci 2024; 25:4920. [PMID: 38732130 PMCID: PMC11084589 DOI: 10.3390/ijms25094920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 04/27/2024] [Accepted: 04/28/2024] [Indexed: 05/13/2024] Open
Abstract
Parkinson's disease (PD), as a neurologically implemented disease with complex etiological factors, has a complex and variable pathogenesis. Accompanying further research, neuroinflammation has been found to be one of the possible factors in its pathogenesis. Microglia, as intrinsic immune cells in the brain, play an important role in maintaining microenvironmental homeostasis in the brain. However, over-activation of neurotoxic microglia in PD promotes neuroinflammation, which further increases dopaminergic (DA) neuronal damage and exacerbates the disease process. Therefore, targeting and regulating the functional state of microglia is expected to be a potential avenue for PD treatment. In addition, plant extracts have shown great potential in the treatment of neurodegenerative disorders due to their abundant resources, mild effects, and the presence of multiple active ingredients. However, it is worth noting that some natural products have certain toxic side effects, so it is necessary to pay attention to distinguish medicinal ingredients and usage and dosage when using to avoid aggravating the progression of diseases. In this review, the roles of microglia with different functional states in PD and the related pathways inducing microglia to transform into neuroprotective states are described. At the same time, it is discussed that abscisic acid (ABA) may regulate the polarization of microglia by targeting them, promote their transformation into neuroprotective state, reduce the neuroinflammatory response in PD, and provide a new idea for the treatment of PD and the selection of drugs.
Collapse
Affiliation(s)
- Tingting Han
- Institute for Brain Sciences Research, School of Life Sciences, Henan University, Kaifeng 475004, China; (T.H.); (Y.X.); (H.L.); (X.C.)
| | - Yuxiang Xu
- Institute for Brain Sciences Research, School of Life Sciences, Henan University, Kaifeng 475004, China; (T.H.); (Y.X.); (H.L.); (X.C.)
| | - Haixuan Liu
- Institute for Brain Sciences Research, School of Life Sciences, Henan University, Kaifeng 475004, China; (T.H.); (Y.X.); (H.L.); (X.C.)
| | - Lin Sun
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, China
| | - Xiangshu Cheng
- Institute for Brain Sciences Research, School of Life Sciences, Henan University, Kaifeng 475004, China; (T.H.); (Y.X.); (H.L.); (X.C.)
| | - Ying Shen
- Department of Physiology, Zhejiang University School of Medicine, Hangzhou 310058, China;
| | - Jianshe Wei
- Institute for Brain Sciences Research, School of Life Sciences, Henan University, Kaifeng 475004, China; (T.H.); (Y.X.); (H.L.); (X.C.)
| |
Collapse
|
2
|
Wu M, Song W, Zhang M, Teng L, Tang Q, Zhu L. Potential mechanisms of exercise for relieving inflammatory pain: a literature review of animal studies. Front Aging Neurosci 2024; 16:1359455. [PMID: 38389561 PMCID: PMC10881774 DOI: 10.3389/fnagi.2024.1359455] [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: 12/21/2023] [Accepted: 01/25/2024] [Indexed: 02/24/2024] Open
Abstract
Inflammatory pain (IP) is one of the most prevalent and intractable human conditions, and it leads to progressive dysfunction and reduced quality of life. Additionally, IP is incredibly challenging to treat successfully with drugs or surgery. The development of IP is complex and multifactorial, and peripheral and central sensitization may influence chronicity and treatment resistance in IP. Understanding the mechanisms underlying IP is vital for developing novel therapies. Strong evidence suggests that exercise can be a first-line relief for patients with IP during rehabilitation. However, the mechanisms through which exercise improves IP remain unclear. Here, we reviewed the current animal experimental evidence for an exercise intervention in IP and proposed biological mechanisms for the effects of synaptic plasticity in the anterior cingulate cortex, endocannabinoids, spinal dorsal horn excitability balance, immune cell polarization balance, cytokines, and glial cells. This information will contribute to basic science and strengthen the scientific basis for exercise therapy prescriptions for IP in clinical practice.
Collapse
Affiliation(s)
- Minmin Wu
- Department of Rehabilitation Medicine, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Wenjing Song
- Department of Rehabilitation Medicine, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Mei Zhang
- Department of Rehabilitation Medicine, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Lili Teng
- Department of Rehabilitation Medicine, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Qiang Tang
- The Second Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, China
| | - Luwen Zhu
- The Second Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, China
| |
Collapse
|
3
|
Kim YS, Han JH, Lim CH, Fang XQ, Jang HS, Lee SY, Yim WJ, Lim JH. Effects of Fermented Polygonum cuspidatum on the Skeletal Muscle Functions. Nutrients 2024; 16:305. [PMID: 38276543 PMCID: PMC10818974 DOI: 10.3390/nu16020305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 01/01/2024] [Accepted: 01/16/2024] [Indexed: 01/27/2024] Open
Abstract
Plant extract fermentation is widely employed to enhance the nutritional and pharmaceutical value of functional foods. Polygonum cuspidatum (Pc) contains flavonoids, anthraquinones, and stilbenes, imparting protective effects against inflammatory diseases, cancer, diabetes, and cardiovascular diseases. However, the effects of fermented Pc on skeletal muscle strength remain unexplored. In this study, we generated fermented Pc using a complex of microorganisms containing Lactobacillus spp. (McPc) and assessed its effects on muscle strength and motor function in mice. Compared to unfermented Pc water extract, elevated levels of emodin and resveratrol were noted in McPc. This was identified and quantified using UPLC-QTOF/MS and HPLC techniques. Gene expression profiling through RNA-seq and quantitative RT-PCR revealed that McPc administration upregulated the expression of genes associated with antioxidants, glycolysis, oxidative phosphorylation, fatty acid oxidation, and mitochondrial biogenesis in cultured C2C12 myotubes and the gastrocnemius muscle in mice. McPc significantly improved skeletal muscle strength, motor coordination, and traction force in mice subjected to sciatic neurectomy and high-fat diet (HFD). McPc administration exhibited more pronounced improvement of obesity, hyperglycemia, fatty liver, and hyperlipidemia in HFD mice compared to control group. These findings support the notion that emodin and resveratrol-enriched McPc may offer health benefits for addressing skeletal muscle weakness.
Collapse
Affiliation(s)
- Young-Seon Kim
- Department of Medicinal Biosciences, College of Biomedical & Health Science, Konkuk University, 268, Chungwon-daero, Chungju 27478, Chungbuk, Republic of Korea; (Y.-S.K.); (C.-H.L.); (X.-Q.F.)
- BK21 Program, Department of Applied Life Science, Graduate School, Konkuk University, 268, Chungwon-daero, Chungju 27478, Chungbuk, Republic of Korea
- Jung-Ang Microbe Research Institute (JM), 398, Jikji-daero, Heungdeok-gu, Cheongju 28576, Chungbuk, Republic of Korea; (J.-H.H.); (H.-S.J.); (S.-Y.L.); (W.-J.Y.)
| | - Ji-Hye Han
- Jung-Ang Microbe Research Institute (JM), 398, Jikji-daero, Heungdeok-gu, Cheongju 28576, Chungbuk, Republic of Korea; (J.-H.H.); (H.-S.J.); (S.-Y.L.); (W.-J.Y.)
| | - Chang-Hoon Lim
- Department of Medicinal Biosciences, College of Biomedical & Health Science, Konkuk University, 268, Chungwon-daero, Chungju 27478, Chungbuk, Republic of Korea; (Y.-S.K.); (C.-H.L.); (X.-Q.F.)
- BK21 Program, Department of Applied Life Science, Graduate School, Konkuk University, 268, Chungwon-daero, Chungju 27478, Chungbuk, Republic of Korea
- Center for Metabolic Diseases, Konkuk University, 268, Chungwon-daero, Chungju 27478, Chungbuk, Republic of Korea
| | - Xue-Quan Fang
- Department of Medicinal Biosciences, College of Biomedical & Health Science, Konkuk University, 268, Chungwon-daero, Chungju 27478, Chungbuk, Republic of Korea; (Y.-S.K.); (C.-H.L.); (X.-Q.F.)
- BK21 Program, Department of Applied Life Science, Graduate School, Konkuk University, 268, Chungwon-daero, Chungju 27478, Chungbuk, Republic of Korea
- Center for Metabolic Diseases, Konkuk University, 268, Chungwon-daero, Chungju 27478, Chungbuk, Republic of Korea
| | - Hyeock-Soon Jang
- Jung-Ang Microbe Research Institute (JM), 398, Jikji-daero, Heungdeok-gu, Cheongju 28576, Chungbuk, Republic of Korea; (J.-H.H.); (H.-S.J.); (S.-Y.L.); (W.-J.Y.)
| | - Sang-Yun Lee
- Jung-Ang Microbe Research Institute (JM), 398, Jikji-daero, Heungdeok-gu, Cheongju 28576, Chungbuk, Republic of Korea; (J.-H.H.); (H.-S.J.); (S.-Y.L.); (W.-J.Y.)
| | - Woo-Jong Yim
- Jung-Ang Microbe Research Institute (JM), 398, Jikji-daero, Heungdeok-gu, Cheongju 28576, Chungbuk, Republic of Korea; (J.-H.H.); (H.-S.J.); (S.-Y.L.); (W.-J.Y.)
| | - Ji-Hong Lim
- Department of Medicinal Biosciences, College of Biomedical & Health Science, Konkuk University, 268, Chungwon-daero, Chungju 27478, Chungbuk, Republic of Korea; (Y.-S.K.); (C.-H.L.); (X.-Q.F.)
- BK21 Program, Department of Applied Life Science, Graduate School, Konkuk University, 268, Chungwon-daero, Chungju 27478, Chungbuk, Republic of Korea
- Center for Metabolic Diseases, Konkuk University, 268, Chungwon-daero, Chungju 27478, Chungbuk, Republic of Korea
| |
Collapse
|
4
|
Forouhan M, Lim WF, Zanetti-Domingues LC, Tynan CJ, Roberts TC, Malik B, Manzano R, Speciale AA, Ellerington R, Garcia-Guerra A, Fratta P, Sorarú G, Greensmith L, Pennuto M, Wood MJA, Rinaldi C. AR cooperates with SMAD4 to maintain skeletal muscle homeostasis. Acta Neuropathol 2022; 143:713-731. [PMID: 35522298 PMCID: PMC9107400 DOI: 10.1007/s00401-022-02428-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 04/10/2022] [Accepted: 04/27/2022] [Indexed: 12/27/2022]
Abstract
Androgens and androgen-related molecules exert a plethora of functions across different tissues, mainly through binding to the transcription factor androgen receptor (AR). Despite widespread therapeutic use and misuse of androgens as potent anabolic agents, the molecular mechanisms of this effect on skeletal muscle are currently unknown. Muscle mass in adulthood is mainly regulated by the bone morphogenetic protein (BMP) axis of the transforming growth factor (TGF)-β pathway via recruitment of mothers against decapentaplegic homolog 4 (SMAD4) protein. Here we show that, upon activation, AR forms a transcriptional complex with SMAD4 to orchestrate a muscle hypertrophy programme by modulating SMAD4 chromatin binding dynamics and enhancing its transactivation activity. We challenged this mechanism of action using spinal and bulbar muscular atrophy (SBMA) as a model of study. This adult-onset neuromuscular disease is caused by a polyglutamine expansion (polyQ) in AR and is characterized by progressive muscle weakness and atrophy secondary to a combination of lower motor neuron degeneration and primary muscle atrophy. Here we found that the presence of an elongated polyQ tract impairs AR cooperativity with SMAD4, leading to an inability to mount an effective anti-atrophy gene expression programme in skeletal muscle in response to denervation. Furthermore, adeno-associated virus, serotype 9 (AAV9)-mediated muscle-restricted delivery of BMP7 is able to rescue the muscle atrophy in SBMA mice, supporting the development of treatments able to fine-tune AR-SMAD4 transcriptional cooperativity as a promising target for SBMA and other conditions associated with muscle loss.
Collapse
Affiliation(s)
- Mitra Forouhan
- Department of Paediatrics, University of Oxford, South Parks Road, Oxford, OX1 3QX, UK
| | - Wooi Fang Lim
- Department of Paediatrics, University of Oxford, South Parks Road, Oxford, OX1 3QX, UK
| | - Laura C Zanetti-Domingues
- Central Laser Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, Oxfordshire, UK
| | - Christopher J Tynan
- Central Laser Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, Oxfordshire, UK
| | - Thomas C Roberts
- Department of Paediatrics, University of Oxford, South Parks Road, Oxford, OX1 3QX, UK
| | - Bilal Malik
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK
| | - Raquel Manzano
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK
| | - Alfina A Speciale
- Department of Paediatrics, University of Oxford, South Parks Road, Oxford, OX1 3QX, UK
| | - Ruth Ellerington
- Department of Paediatrics, University of Oxford, South Parks Road, Oxford, OX1 3QX, UK
| | - Antonio Garcia-Guerra
- Department of Paediatrics, University of Oxford, South Parks Road, Oxford, OX1 3QX, UK
| | - Pietro Fratta
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK
| | - Gianni Sorarú
- Department of Neurosciences, Neurology Unit, University of Padova, Padova, Italy
- Venetian Institute of Molecular Medicine (VIMM), Padova, Italy
| | - Linda Greensmith
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK
| | - Maria Pennuto
- Venetian Institute of Molecular Medicine (VIMM), Padova, Italy
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Matthew J A Wood
- Department of Paediatrics, University of Oxford, South Parks Road, Oxford, OX1 3QX, UK
- MDUK Oxford Neuromuscular Centre, University of Oxford, Oxford, UK
| | - Carlo Rinaldi
- Department of Paediatrics, University of Oxford, South Parks Road, Oxford, OX1 3QX, UK.
- MDUK Oxford Neuromuscular Centre, University of Oxford, Oxford, UK.
| |
Collapse
|
5
|
Xu T, Liu R, Lu X, Wu X, Heneberg P, Mao Y, Jiang Q, Loor J, Yang Z. Lycium barbarum polysaccharides alleviate LPS-induced inflammatory responses through PPARγ/MAPK/NF-κB pathway in bovine mammary epithelial cells. J Anim Sci 2021; 100:6429718. [PMID: 34791267 DOI: 10.1093/jas/skab345] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 11/12/2021] [Indexed: 11/13/2022] Open
Abstract
As the main component of the gram-negative bacterial cell wall, lipopolysaccharide (LPS) is well-documented as an inducer of inflammation in bovine mammary cells. Lycium barbarum (goji) polysaccharides (LBP) have been used in non-ruminants as prebiotics to improve growth performance, immune ability and antioxidant capacity. We aimed to investigate the underlying effects of LBPs on pro-inflammatory responses in LPS-stimulated primary bovine mammary epithelial cells (bMECs). Cells were isolated from mammary tissue of 3 lactating Holstein cows without clinical disease (30.26 ± 3.1 kg/d of milk yield; 175 ± 6 DIM). For the pre-experimental treatment, bMECs were precultured with serum-free medium for 12 h. Treatments were as follows: pretreatment with culture medium devoid of LPS or LBP for 30 h (CON); CON for 24 h followed by challenge with 2 μg/mL LPS for 6 h (LPS); pretreatment with 100 μg/mL or 300 μg/mL LBP for 24 h followed by LPS challenge (2 μg/mL) for 6 h (LBP(100)+LPS; LBP(300)+LPS). To further determine if the effect of LBP on immune-regulation is PPARγ activation-dependent, an inhibitor of PPARγ, GW9662, at a concentration of 1 μM was used. Cells treated with LBP at 100, 300 and 500 μg/mL had upregulated protein abundance of PPARγ, while PGC1α had a higher expression only at 300 μg/mL of LBP treatment. Compared with CON, cells pretreated with LBP at 100 and 300 μg/mL had greater protein abundance of SCD1 and SREBP1. EdU staining and cell wound healing assays showed that the negative effect of LPS alone on cell proliferation was reversed by pretreatment with LBP at both 100 and 300 μg/mL. Upregulation of gene and protein abundance of proinflammatory factors and cytokines (COX-2, NLRP3, TNF-α, IL-1β and IL-6) induced by LPS stimulation were alleviated by LBP pretreatment at 300 μg/mL (more than 2-fold decrease). Compared with LPS challenge alone, phosphorylation of proteins involved in NF-κB (IκBα and p65) and MAPK (p38, JNK and ERK) pathways was downregulated following LBP treatment. Additionally, inhibition of PPARγ by GW9662 weakened the protective effect of LBP on LPS-induced protein abundance of phosphorylated p65, COX-2, IL-1β and TNF-α. These results indicated that the protective effect of LBP on LPS-induced bMECs inflammatory responses is PPARγ activation-dependent. As such, this knowledge might help design strategies for intervening against the detrimental effects of bovine mastitis.
Collapse
Affiliation(s)
- Tianle Xu
- Joint International Research Laboratory of Agriculture and Agri-product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, P. R. China.,College of Animal Science and Technology, Yangzhou University, Yangzhou, P. R. China
| | - Run Liu
- Joint International Research Laboratory of Agriculture and Agri-product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, P. R. China
| | - Xubin Lu
- Joint International Research Laboratory of Agriculture and Agri-product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, P. R. China
| | - Xinyue Wu
- Joint International Research Laboratory of Agriculture and Agri-product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, P. R. China.,College of Animal Science and Technology, Yangzhou University, Yangzhou, P. R. China
| | - Petr Heneberg
- Third Faculty of Medicine, Charles University, Prague, Czechia
| | - Yongjiang Mao
- Joint International Research Laboratory of Agriculture and Agri-product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, P. R. China
| | - Qianming Jiang
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana, USA
| | - Juan Loor
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana, USA
| | - Zhangping Yang
- Joint International Research Laboratory of Agriculture and Agri-product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, P. R. China.,College of Animal Science and Technology, Yangzhou University, Yangzhou, P. R. China
| |
Collapse
|
6
|
Li L, Zuo X, Liu D, Luo H, Zhu H. The Functional Roles of RNAs Cargoes Released by Neutrophil-Derived Exosomes in Dermatomyositis. Front Pharmacol 2021; 12:727901. [PMID: 34603043 PMCID: PMC8484304 DOI: 10.3389/fphar.2021.727901] [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: 06/20/2021] [Accepted: 08/20/2021] [Indexed: 12/28/2022] Open
Abstract
Dermatomyositis (DM) is an idiopathic inflammatory myopathy characterized by cutaneous manifestations. We first identified the profiles of noncoding RNAs (lncRNAs and miRNAs) in peripheral neutrophil exosomes (EXOs) of DM patients and explored their potential functional roles. Bioinformatics analyses were performed with R packages. Real-time quantitative PCR was used to validate the altered RNAs in DM neutrophil EXO-stimulated human dermal microvascular endothelial cells (HDMECs) and human skeletal muscle myoblasts (HSkMCs). In DM neutrophil EXOs, 124 upregulated lncRNAs (with 1,392 target genes), 255 downregulated lncRNAs (with 1867 target genes), 17 upregulated miRNAs (with 2,908 target genes), and 15 downregulated miRNAs (with 2,176 target genes) were identified. GO analysis showed that the differentially expressed (DE) lncRNAs and DE miRNAs participated in interleukin-6 and interferon-beta production, skeletal muscle cell proliferation and development, and endothelial cell development and differentiation. KEGG analysis suggested that DE lncRNAs and DE miRNAs were enriched in the PI3K–Akt, MAPK, AMPK and FoxO signalling pathways. Many novel and valuable DE lncRNAs and DE miRNAs interacted and cotargeted in the PI3K–Akt, MAPK, AMPK and FoxO signalling pathways. Our study suggests that neutrophil EXOs participate in DM pathogenesis through lncRNAs and miRNAs in the PI3K–Akt, MAPK, AMPK and FoxO signalling pathways.
Collapse
Affiliation(s)
- Liya Li
- The Department of Rheumatology and Immunology, Xiangya Hospital of Central South University, Changsha, China.,The Department of Rheumatology and Immunology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Xiaoxia Zuo
- The Department of Rheumatology and Immunology, Xiangya Hospital of Central South University, Changsha, China.,Provincial Clinical Research Center for Rheumatic and Immunologic Diseases, Xiangya Hospital, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, China
| | - Di Liu
- The Department of Rheumatology and Immunology, Xiangya Hospital of Central South University, Changsha, China
| | - Hui Luo
- The Department of Rheumatology and Immunology, Xiangya Hospital of Central South University, Changsha, China.,Provincial Clinical Research Center for Rheumatic and Immunologic Diseases, Xiangya Hospital, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, China
| | - Honglin Zhu
- The Department of Rheumatology and Immunology, Xiangya Hospital of Central South University, Changsha, China.,Provincial Clinical Research Center for Rheumatic and Immunologic Diseases, Xiangya Hospital, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, China
| |
Collapse
|
7
|
Development of mode of action networks related to the potential role of PPARγ in respiratory diseases. Pharmacol Res 2021; 172:105821. [PMID: 34403731 DOI: 10.1016/j.phrs.2021.105821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 08/12/2021] [Accepted: 08/13/2021] [Indexed: 11/30/2022]
Abstract
The peroxisome proliferator-activated receptor γ (PPARγ) is a key transcription factor, operating at the intercept of metabolic control and immunomodulation. It is ubiquitously expressed in multiple tissues and organs, including lungs. There is a growing body of information supporting the role of PPARγ signalling in respiratory diseases. The aim of the present study was to develop mode of action (MoA) networks reflecting the relationships between PPARγ signalling and the progression/alleviation of a spectrum of lung pathologies. Data mining was performed using the resources of the NIH PubMed and PubChem information systems. By linking available data on pathological/therapeutic effects of PPARγ modulation, knowledge-based MoA networking at different levels of biological organization (molecular, cellular, tissue, organ, and system) was performed. Multiple MoA networks were developed to relate PPARγ modulation to the progress or the alleviation of pulmonary disorders, triggered by diverse pathogenic, genetic, chemical, or mechanical factors. Pharmacological targeting of PPARγ signalling was discussed with regard to ligand- and cell type-specific effects in the context of distinct disease inductor- and disease stage-dependent patterns. The proposed MoA networking analysis allows for a better understanding of the potential role of PPARγ modulation in lung pathologies. It presents a mechanistically justified basis for further computational, experimental, and clinical monitoring studies on the dynamic control of PPARγ signalling in respiratory diseases.
Collapse
|
8
|
de Azambuja G, Jorge CO, Gomes BB, Lourenço HR, Simabuco FM, Oliveira-Fusaro MCG. Regular swimming exercise prevented the acute and persistent mechanical muscle hyperalgesia by modulation of macrophages phenotypes and inflammatory cytokines via PPARγ receptors. Brain Behav Immun 2021; 95:462-476. [PMID: 33964434 DOI: 10.1016/j.bbi.2021.05.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 04/09/2021] [Accepted: 05/03/2021] [Indexed: 12/31/2022] Open
Abstract
Physically active individuals are less likely to develop chronic pain, and physical exercise is an established strategy to control inflammatory diseases. Here, we hypothesized that 1) peripheral pro-inflammatory macrophages phenotype contribute to predisposition of the musculoskeletal to chronic pain, and that 2) activation of PPARγ receptors, modulation of macrophage phenotypes and cytokines through physical exercise would prevent persistent muscle pain. We tested these hypotheses using swimming exercise, pharmacological and immunochemical techniques in a rodent model of persistent muscle hyperalgesia. Swimming prevented the persistent mechanical muscle hyperalgesia most likely through activation of PPARγ receptors, as well as activation of PPARγ receptors by 15d-PGJ2 and depletion of muscle macrophages in sedentary animals. Acute and persistent muscle hyperalgesia were characterized by an increase in pro-inflammatory macrophages phenotype, and swimming and the 15d-PGJ2 prevented this increase and increased anti-inflammatory macrophages phenotype. Finally, IL-1β concentration in muscle increased in the acute phase, which was also prevented by PPARγ receptors activation through swimming. Besides, swimming increased muscle concentration of IL-10 in both acute and chronic phases, but only in the persistent phase through PPARγ receptors. Our findings suggest physical exercise activates PPARγ receptors and increases anti-inflammatory responses in the muscle tissue by modulating macrophages phenotypes and cytokines, thereby preventing the establishment of persistent muscle hyperalgesia. These results further highlight the potential of physical exercise to prevent chronic muscle pain.
Collapse
Affiliation(s)
- Graciana de Azambuja
- Laboratory of Pain and Inflammation Research, School of Applied Sciences, University of Campinas, Brazil
| | - Carolina O Jorge
- Laboratory of Pain and Inflammation Research, School of Applied Sciences, University of Campinas, Brazil
| | - Beatriz B Gomes
- Laboratory of Pain and Inflammation Research, School of Applied Sciences, University of Campinas, Brazil
| | - Hayla R Lourenço
- Laboratory of Pain and Inflammation Research, School of Applied Sciences, University of Campinas, Brazil
| | - Fernando M Simabuco
- Multidisciplinary Laboratory in Food and Health, School of Applied Sciences, University of Campinas, Brazil
| | | |
Collapse
|
9
|
Song X, Yan G, Wang H, Lou D. Septin 4 activates PPARγ/LXRα signaling by upregulating ABCA1 and ABCG1 expression to inhibit the formation of THP-1 macrophage-derived foam cells. Exp Ther Med 2021; 22:763. [PMID: 34035860 PMCID: PMC8135116 DOI: 10.3892/etm.2021.10195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 02/08/2021] [Indexed: 11/30/2022] Open
Abstract
Septin 4 is a member of a family of GTP-binding proteins that has been previously reported regulate cytoskeletal organization. In addition, it has been suggested to serve a role in atherosclerosis. Therefore, the present study aimed to investigate the effects of Septin 4 on foam cell formation. THP-1 cells were first exposed to phorbol-12-myristate-13-acetate for differentiation into macrophages before being transformed into foam cells by treatment with oxidized low-density lipoprotein (ox-LDL). Septin 4 expression was then knocked down or overexpressed in THP-1 cells using transfection, whilst peroxisome proliferator activated receptor γ (PPARγ) was also inhibited using its selective antagonist (T0070907) in the presence of Septin 4 overexpression. Oil red staining was used to detect lipid uptake, and total cholesterol (TC), free cholesterol (FC) and ATP binding cassette subfamily A/G member 1 (ABCA1/G1) protein expression were also measured. The results demonstrated that upon ox-LDL stimulation, macrophages that were derived from THP-1 cells transformed into foam cells, where Septin 4 was highly expressed in ox-LDL-induced foam cells. Septin 4 knockdown promoted TC and FC levels, but reduced ABCA1/G1 protein expression. The protein expression levels of PPARγ and liver X receptor α (LXRα) were also decreased after Septin 4 knockdown. However, Septin 4 overexpression resulted in the opposite results being observed. Additionally, blocking PPARγ activity using its inhibitor T0070907 or knocking down LXRα expression using short hairpin RNA reversed the effects of Septin 4 overexpression on foam cell formation and cholesterol handling. In conclusion, Septin 4 may serve an important role in preventing foam cell formation by activating PPARγ/LXRα signaling and subsequently enhancing ABCA1/G1 expression.
Collapse
Affiliation(s)
- Xiaoying Song
- Department of Geriatrics, Shanghai Municipal Hospital of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200071, P.R. China
| | - Guoliang Yan
- Department of Emergency, Shanghai Municipal Hospital of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200071, P.R. China
| | - Haihui Wang
- Department of Emergency, Shanghai Municipal Hospital of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200071, P.R. China
| | - Danfei Lou
- Department of Geriatrics, Shanghai Municipal Hospital of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200071, P.R. China
| |
Collapse
|
10
|
Swimming exercise improves gene expression of PPAR-γ and downregulates the overexpression of TLR4, MyD88, IL-6, and TNF-α after high-fat diet in rat skeletal muscle cells. Gene 2021; 775:145441. [PMID: 33482280 DOI: 10.1016/j.gene.2021.145441] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 12/26/2020] [Accepted: 01/13/2021] [Indexed: 02/07/2023]
Abstract
Exercise training with anti-inflammatory effects can improve insulin sensitivity in muscle tissue. This study investigated the effects of eight-week swimming exercises on lipid profile, toll-like receptor 4 (TLR4), myeloid differentiation factor 88 (MyD88), tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6), and peroxisome proliferator-activated receptor gamma (PPAR-γ) in gastrocnemius muscle of rats fed with high-fat diet (HFD). Thirty-two healthy male Wistar rats (8 weeks, 200 ± 20 g) were randomly divided into four groups (n = 8 each group): the control (C), aerobic exercise (E), HFD, and HFD + aerobic exercise (HFD & E). The exercise training protocol consisted of swimming 60 min/day, 5 days/week for eight weeks. Serum levels of glucose, insulin, and lipid profile were measured at end of the study. Protein expressions of TLR4, TNF-α, and IL-6 were determined by immunohistochemical method. Gene expression of TLR4/MyD88, TNF-α, IL-6, and PPAR-γ was evaluated by a real-time polymerase chain reaction in gastrocnemius muscle. HFD fed rats showed higher levels of cholesterol and LDL-c that were similar in weight gain. Meanwhile, the HFD group had a higher gene expression of TLR4, MyD88, TNF-α, IL-6, and lower gene expression of PPAR-γ compared to the control group (p < 0.05). Muscle protein expression of TLR4, TNF-α, IL-6 was lower in the E and HFD&E groups (especially when compared to HFD group, P < 0.05). We also showed a decrease in TLR4/MyD88 mRNA and an increase in PPAR-γ mRNA in gastrocnemius of E and HFD&E groups (compared to HFD group, p < 0.05). Insulin resistance in HFD&E groups show a significant decrease compared to the HFD group (p < 0.05). It seems that swimming aerobic exercise for eight weeks controlled the destructive effects of HFD on muscle inflammatory pathways along with the down-regulation of the TLR4/MyD88, inflammatory cytokine, and up-regulation PPAR-γ mRNA. It appears that the down-regulation in the expression of TLR4/MyD88 mRNA reduces the muscle pro-inflammatory cytokines, such as IL-6 and TNF-α, whose action may be caused by the adaptation of swimming aerobic exercise (an increase of PPAR-γ). Therefore, local and systemic inflammatory changes due to HFD and obesity may be affected by metabolic adaptations of aerobic exercise training, which requires further studies.
Collapse
|
11
|
Perini F, Cendron F, Rovelli G, Castellini C, Cassandro M, Lasagna E. Emerging Genetic Tools to Investigate Molecular Pathways Related to Heat Stress in Chickens: A Review. Animals (Basel) 2020; 11:ani11010046. [PMID: 33383690 PMCID: PMC7823582 DOI: 10.3390/ani11010046] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/21/2020] [Accepted: 12/24/2020] [Indexed: 12/13/2022] Open
Abstract
Simple Summary New genomic tools have been used as an instrument in order to assess the molecular pathway involved in heat stress resistance. Local chicken breeds have a better attitude to face heat stress. This review aims to summarize studies linked to chickens, heat stress, and heat shock protein. Abstract Chicken products are the most consumed animal-sourced foods at a global level across greatly diverse cultures, traditions, and religions. The consumption of chicken meat has increased rapidly in the past few decades and chicken meat is the main animal protein source in developing countries. Heat stress is one of the environmental factors which decreases the productive performance of poultry and meat quality. Heat stress produces the over-expression of heat shock factors and heat shock proteins in chicken tissues. Heat shock proteins regulate several molecular pathways in cells in response to stress conditions, changing the homeostasis of cells and tissues. These changes can affect the physiology of the tissue and hence the production ability of chickens. Indeed, commercial chicken strains can reach a high production level, but their body metabolism, being comparatively accelerated, has poor thermoregulation. In contrast, native backyard chickens are more adapted to the environments in which they live, with a robustness that allows them to survive and reproduce constantly. In the past few years, new molecular tools have been developed, such as RNA-Seq, Single Nucleotide Polymorphisms (SNPs), and bioinformatics approaches such as Genome-Wide Association Study (GWAS). Based on these genetic tools, many studies have detected the main pathways involved in cellular response mechanisms. In this context, it is necessary to clarify all the genetic and molecular mechanisms involved in heat stress response. Hence, this paper aims to review the ability of the new generation of genetic tools to clarify the molecular pathways associated with heat stress in chickens, offering new perspectives for the use of these findings in the animal breeding field.
Collapse
Affiliation(s)
- Francesco Perini
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, 74, 06121 Perugia (PG), Italy; (F.P.); (G.R.); (C.C.); (E.L.)
| | - Filippo Cendron
- Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padova, Viale dell’Università, 16, 35020 Legnaro (PD), Italy;
- Correspondence:
| | - Giacomo Rovelli
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, 74, 06121 Perugia (PG), Italy; (F.P.); (G.R.); (C.C.); (E.L.)
| | - Cesare Castellini
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, 74, 06121 Perugia (PG), Italy; (F.P.); (G.R.); (C.C.); (E.L.)
| | - Martino Cassandro
- Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padova, Viale dell’Università, 16, 35020 Legnaro (PD), Italy;
| | - Emiliano Lasagna
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, 74, 06121 Perugia (PG), Italy; (F.P.); (G.R.); (C.C.); (E.L.)
| |
Collapse
|
12
|
De Nuccio C, Bernardo A, Troiano C, Brignone MS, Falchi M, Greco A, Rosini M, Basagni F, Lanni C, Serafini MM, Minghetti L, Visentin S. NRF2 and PPAR-γ Pathways in Oligodendrocyte Progenitors: Focus on ROS Protection, Mitochondrial Biogenesis and Promotion of Cell Differentiation. Int J Mol Sci 2020; 21:E7216. [PMID: 33003644 PMCID: PMC7583077 DOI: 10.3390/ijms21197216] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 09/18/2020] [Accepted: 09/26/2020] [Indexed: 12/15/2022] Open
Abstract
An adequate protection from oxidative and inflammatory reactions, together with the promotion of oligodendrocyte progenitor (OP) differentiation, is needed to recover from myelin damage in demyelinating diseases. Mitochondria are targets of inflammatory and oxidative insults and are essential in oligodendrocyte differentiation. It is known that nuclear factor-erythroid 2-related factor/antioxidant responsive element (NRF2/ARE) and peroxisome proliferator-activated receptor gamma/PPAR-γ response element (PPAR-γ/PPRE) pathways control inflammation and overcome mitochondrial impairment. In this study, we analyzed the effects of activators of these pathways on mitochondrial features, protection from inflammatory/mitochondrial insults and cell differentiation in OP cultures, to depict the specificities and similarities of their actions. We used dimethyl-fumarate (DMF) and pioglitazone (pio) as agents activating NRF2 and PPAR-γ, respectively, and two synthetic hybrids acting differently on the NRF2/ARE pathway. Only DMF and compound 1 caused early effects on the mitochondria. Both DMF and pio induced mitochondrial biogenesis but different antioxidant repertoires. Moreover, pio induced OP differentiation more efficiently than DMF. Finally, DMF, pio and compound 1 protected from tumor necrosis factor-alpha (TNF-α) insult, with pio showing faster kinetics of action and compound 1 a higher activity than DMF. In conclusion, NRF2 and PPAR-γ by inducing partially overlapping pathways accomplish complementary functions aimed at the preservation of mitochondrial function, the defense against oxidative stress and the promotion of OP differentiation.
Collapse
Affiliation(s)
- Chiara De Nuccio
- Research Coordination and Support Service, Istituto Superiore di Sanità, 00161 Rome, Italy; (C.D.N.); (L.M.)
| | - Antonietta Bernardo
- National Center for Research and Preclinical and Clinical Evaluation of Drugs, Istituto Superiore di Sanità, 00161 Rome, Italy; (A.B.); (A.G.)
| | - Carmen Troiano
- Department of Cell Biology and Neurosciences, Istituto Superiore di Sanità, 00161 Rome, Italy;
| | | | - Mario Falchi
- National Research Center on HIV/AIDS, Istituto Superiore di Sanità, 00161 Rome, Italy;
| | - Anita Greco
- National Center for Research and Preclinical and Clinical Evaluation of Drugs, Istituto Superiore di Sanità, 00161 Rome, Italy; (A.B.); (A.G.)
| | - Michela Rosini
- Department of Pharmacy and Biotechnology, University of Bologna, 40126 Bologna, Italy; (M.R.); (F.B.)
| | - Filippo Basagni
- Department of Pharmacy and Biotechnology, University of Bologna, 40126 Bologna, Italy; (M.R.); (F.B.)
| | - Cristina Lanni
- Department of Drug Sciences, University of Pavia, 27100 Pavia, Italy; (C.L.); (M.M.S.)
| | | | - Luisa Minghetti
- Research Coordination and Support Service, Istituto Superiore di Sanità, 00161 Rome, Italy; (C.D.N.); (L.M.)
| | - Sergio Visentin
- National Center for Research and Preclinical and Clinical Evaluation of Drugs, Istituto Superiore di Sanità, 00161 Rome, Italy; (A.B.); (A.G.)
| |
Collapse
|
13
|
Mankhong S, Kim S, Moon S, Kwak HB, Park DH, Kang JH. Experimental Models of Sarcopenia: Bridging Molecular Mechanism and Therapeutic Strategy. Cells 2020; 9:E1385. [PMID: 32498474 PMCID: PMC7348939 DOI: 10.3390/cells9061385] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 05/27/2020] [Accepted: 05/27/2020] [Indexed: 12/15/2022] Open
Abstract
Sarcopenia has been defined as a progressive decline of skeletal muscle mass, strength, and functions in elderly people. It is accompanied by physical frailty, functional disability, falls, hospitalization, and mortality, and is becoming a major geriatric disorder owing to the increasing life expectancy and growing older population worldwide. Experimental models are critical to understand the pathophysiology of sarcopenia and develop therapeutic strategies. Although its etiologies remain to be further elucidated, several mechanisms of sarcopenia have been identified, including cellular senescence, proteostasis imbalance, oxidative stress, and "inflammaging." In this article, we address three main aspects. First, we describe the fundamental aging mechanisms. Next, we discuss both in vitro and in vivo experimental models based on molecular mechanisms that have the potential to elucidate the biochemical processes integral to sarcopenia. The use of appropriate models to reflect sarcopenia and/or its underlying pathways will enable researchers to understand sarcopenia and develop novel therapeutic strategies for sarcopenia. Lastly, we discuss the possible molecular targets and the current status of drug candidates for sarcopenia treatment. In conclusion, the development of experimental models for sarcopenia is essential to discover molecular targets that are valuable as biochemical biomarkers and/or therapeutic targets for sarcopenia.
Collapse
Affiliation(s)
- Sakulrat Mankhong
- Department of Pharmacology, Hypoxia-related Disease Research Center, College of Medicine, Inha University, Incheon 22212, Korea; (S.M.); (S.K.); (S.M.)
| | - Sujin Kim
- Department of Pharmacology, Hypoxia-related Disease Research Center, College of Medicine, Inha University, Incheon 22212, Korea; (S.M.); (S.K.); (S.M.)
- Department of Kinesiology, Inha University, Incheon 22212, Korea; (H.-B.K.); (D.-H.P.)
- Institute of Sports & Arts Convergence (ISAC), Inha University, Incheon 22212, Korea
| | - Sohee Moon
- Department of Pharmacology, Hypoxia-related Disease Research Center, College of Medicine, Inha University, Incheon 22212, Korea; (S.M.); (S.K.); (S.M.)
| | - Hyo-Bum Kwak
- Department of Kinesiology, Inha University, Incheon 22212, Korea; (H.-B.K.); (D.-H.P.)
- Institute of Sports & Arts Convergence (ISAC), Inha University, Incheon 22212, Korea
| | - Dong-Ho Park
- Department of Kinesiology, Inha University, Incheon 22212, Korea; (H.-B.K.); (D.-H.P.)
- Institute of Sports & Arts Convergence (ISAC), Inha University, Incheon 22212, Korea
| | - Ju-Hee Kang
- Department of Pharmacology, Hypoxia-related Disease Research Center, College of Medicine, Inha University, Incheon 22212, Korea; (S.M.); (S.K.); (S.M.)
- Institute of Sports & Arts Convergence (ISAC), Inha University, Incheon 22212, Korea
| |
Collapse
|
14
|
Dexmedetomidine Attenuates Monocyte-Endothelial Adherence via Inhibiting Connexin43 on Vascular Endothelial Cells. Mediators Inflamm 2020; 2020:7039854. [PMID: 32104150 PMCID: PMC7035564 DOI: 10.1155/2020/7039854] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 01/09/2020] [Accepted: 01/23/2020] [Indexed: 12/15/2022] Open
Abstract
Current studies have identified the multifaceted protective functions of dexmedetomidine on multiple organs. For the first time, we clarify effects of dexmedetomidine on monocyte-endothelial adherence and whether its underlying mechanism is relative to connexin43 (Cx43), a key factor regulating monocyte-endothelial adherence. U937 monocytes and human umbilical vein endothelial cells (HUVECs) were used to explore monocyte-endothelial adherence. Two special siRNAs were designed to knock down Cx43 expression on HUVECs. U937-HUVEC adhesion, adhesion-related molecules, and the activation of the MAPK (p-ERK1/2, p-p38, and p-JNK1/2) signaling pathway were detected. Dexmedetomidine, at its clinically relevant concentrations (0.1 nM and 1 nM), was given as pretreatments to HUVECs. Its effects on Cx43 and U937-HUVEC adhesion were also investigated. The results show that inhibiting Cx43 on HUVECs could attenuate the contents of MCP-1, soluble ICAM-1 (sICAM-1), soluble VCAM-1 (sVCAM-1), and the nonprocessed variants of the adhesion molecules ICAM-1 and VCAM-1 and ultimately result in U937-HUVEC adhesion decrease. Meanwhile, the activation of MAPKs was also inhibited. U0126 (inhibiting p-ERK1/2) and SB202190 (inhibiting p38) decreased the contents of MCP-1, sICAM-1, and sVCAM-1, but SP600125 (inhibiting p-JNK1/2) had none of these effects. ICAM-1 and VCAM-1 could be regulated in a similar way. Dexmedetomidine pretreatment inhibited Cx43 on HUVECs, the activation of MAPKs, and U937-HUVEC adhesion. Therefore, we conclude that dexmedetomidine attenuates U937-HUVEC adhesion via inhibiting Cx43 on HUVECs modulating the activation of MAPK signaling pathways.
Collapse
|
15
|
Swimming Physical Training Prevented the Onset of Acute Muscle Pain by a Mechanism Dependent of PPARγ Receptors and CINC-1. Neuroscience 2020; 427:64-74. [DOI: 10.1016/j.neuroscience.2019.12.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 12/08/2019] [Accepted: 12/09/2019] [Indexed: 12/17/2022]
|
16
|
Penas FN, Carta D, Cevey ÁC, Rada MJ, Pieralisi AV, Ferlin MG, Sales ME, Mirkin GA, Goren NB. Pyridinecarboxylic Acid Derivative Stimulates Pro-Angiogenic Mediators by PI3K/AKT/mTOR and Inhibits Reactive Nitrogen and Oxygen Species and NF-κB Activation Through a PPARγ-Dependent Pathway in T. cruzi-Infected Macrophages. Front Immunol 2020; 10:2955. [PMID: 31993046 PMCID: PMC6964702 DOI: 10.3389/fimmu.2019.02955] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 12/02/2019] [Indexed: 12/24/2022] Open
Abstract
Chagas disease is caused by Trypanosoma cruzi infection and represents an important public health concern in Latin America. Macrophages are one of the main infiltrating leukocytes in response to infection. Parasite persistence could trigger a sustained activation of these cells, contributing to the damage observed in this pathology, particularly in the heart. HP24, a pyridinecarboxylic acid derivative, is a new PPARγ ligand that exerts anti-inflammatory and pro-angiogenic effects. The aim of this work was to deepen the study of the mechanisms involved in the pro-angiogenic and anti-inflammatory effects of HP24 in T. cruzi-infected macrophages, which have not yet been elucidated. We show for the first time that HP24 increases expression of VEGF-A and eNOS through PI3K/AKT/mTOR and PPARγ pathways and that HP24 inhibits iNOS expression and NO release, a pro-inflammatory mediator, through PPARγ-dependent mechanisms. Furthermore, this study shows that HP24 modulates H2O2 production in a PPARγ-dependent manner. It is also demonstrated that this new PPARγ ligand inhibits the NF-κB pathway. HP24 inhibits IKK phosphorylation and IκB-α degradation, as well as p65 translocation to the nucleus in a PPARγ-dependent manner. In Chagas disease, both the sustained increment in pro-inflammatory mediators and microvascular abnormalities are crucial aspects for the generation of cardiac damage. Elucidating the mechanism of action of new PPARγ ligands is highly attractive, given the fact that it can be used as an adjuvant therapy, particularly in the case of Chagas disease in which inflammation and tissue remodeling play an important role in the pathophysiology of this disease.
Collapse
Affiliation(s)
- Federico Nicolás Penas
- Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Investigaciones Biomédicas en Retrovirus y Sida (INBIRS), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Davide Carta
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Ágata Carolina Cevey
- Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Investigaciones Biomédicas en Retrovirus y Sida (INBIRS), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - María Jimena Rada
- Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Investigaciones Biomédicas en Retrovirus y Sida (INBIRS), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Azul Victoria Pieralisi
- Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Investigaciones Biomédicas en Retrovirus y Sida (INBIRS), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - María Grazia Ferlin
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - María Elena Sales
- Centro de Estudios Farmacológicos y Botánicos (CEFyBO), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Gerardo A Mirkin
- Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Nora Beatriz Goren
- Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Investigaciones Biomédicas en Retrovirus y Sida (INBIRS), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| |
Collapse
|
17
|
Li Q, Xing W, Xu X, Wang S, He Y, Wang Y, Sun H. RETRACTED: Tetramethylpyrazine alleviates lipopolysaccharide-induced damage in ATDC5 cells via down-regulating MyD88. Exp Mol Pathol 2019; 111:104317. [PMID: 31655387 DOI: 10.1016/j.yexmp.2019.104317] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 08/27/2019] [Accepted: 10/07/2019] [Indexed: 11/26/2022]
Abstract
This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article has been retracted at the request of the Editor-in-Chief and the authors. Following the concerns raised about the background pattern of the Western Blots from Figures 7A and 7C, the authors have contacted the journal to request the retraction of the article as they were reportedly not confident of the accuracy of the data and the conclusions of the article. Given the comments of Dr Elisabeth Bik regarding this article “This paper belongs to a set of over 400 papers (as per February 2020) that share very similar Western blots with tadpole-like shaped bands, the same background pattern, and striking similarities in title structures, paper layout, bar graph design, and - in a subset - flow cytometry panels”, the journal requested the authors to provide the raw data. However, the authors were not able to fulfil this request and therefore the Editor-in-Chief decided to retract the article.
Collapse
Affiliation(s)
- Qiang Li
- Department of Hand Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, China
| | - Wanying Xing
- Department of Breast Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, China
| | - Xiong Xu
- Department of Hand Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, China
| | - Sulong Wang
- Department of Hand Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, China
| | - Yisha He
- Department of Hand Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, China
| | - Yueshu Wang
- Department of Hand Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, China.
| | - Hongbin Sun
- Department of Hand Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, China.
| |
Collapse
|
18
|
Srikanth K, Kumar H, Park W, Byun M, Lim D, Kemp S, Te Pas MFW, Kim JM, Park JE. Cardiac and Skeletal Muscle Transcriptome Response to Heat Stress in Kenyan Chicken Ecotypes Adapted to Low and High Altitudes Reveal Differences in Thermal Tolerance and Stress Response. Front Genet 2019; 10:993. [PMID: 31681427 PMCID: PMC6798392 DOI: 10.3389/fgene.2019.00993] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 09/18/2019] [Indexed: 12/30/2022] Open
Abstract
Heat stress (HS) negatively affects chicken performance. Agricultural expansion will happen in regions that experience high ambient temperatures, where fast-growing commercial chickens are vulnerable. Indigenous chickens of such regions, due to generations of exposure to environmental challenges, might have higher thermal tolerance. In this study, two indigenous chicken ecotypes, from the hot and humid Mombasa (lowland) and the colder Naivasha (highland) regions, were used to investigate the effects of acute (5 h, 35°C) and chronic (3 days of 35°C for 8 h/day) HS on the cardiac and skeletal muscle, through RNA sequencing. The rectal temperature gain and the number of differentially expressed genes (DEGs) [False Discovery Rate (FDR) < 0.05] were two times higher in the acute stage than in the chronic stage in both ecotypes, suggesting that cyclic exposure to HS can lead to adaptation. A tissue- and stage-specific difference in response to HS was observed, with peroxisome proliferator-activated-receptor (PPAR) signaling and mitogen-activate protein kinase (MAPK) signaling pathways, enriched in heart and skeletal muscle, respectively, and the p53 pathway enriched only in the acute stage in both tissues. The acute and chronic stage DEGs were integrated by a region-specific gene coexpression network (GCN), and genes with the highest number of connections (hub genes) were identified. The hub genes in the lowland network were CCNB2, Crb2, CHST9, SESN1, and NR4A3, while COMMD4, TTC32, H1F0, ACYP1, and RPS28 were the hub genes in the highland network. Pathway analysis of genes in the GCN showed that p53 and PPAR signaling pathways were enriched in both low and highland networks, while MAPK signaling and protein processing in endoplasmic reticulum were enriched only in the gene network of highland chickens. This shows that to dissipate the accumulated heat, to reduce heat induced apoptosis, and to promote DNA damage repair, the ecotypes activated or suppressed different genes, indicating the differences in thermal tolerance and HS response mechanisms between the ecotypes. This study provides information on the HS response of chickens, adapted to two different agro climatic environments, extending our understanding of the mechanisms of HS response and the effect of adaptation in counteracting HS.
Collapse
Affiliation(s)
- Krishnamoorthy Srikanth
- Animal Genomics and Bioinformatics Division, National Institute of Animal Science, RDA, Wanju, South Korea
| | - Himansu Kumar
- Animal Genomics and Bioinformatics Division, National Institute of Animal Science, RDA, Wanju, South Korea
| | - Woncheoul Park
- Animal Genomics and Bioinformatics Division, National Institute of Animal Science, RDA, Wanju, South Korea
| | - Mijeong Byun
- Animal Genomics and Bioinformatics Division, National Institute of Animal Science, RDA, Wanju, South Korea
| | - Dajeong Lim
- Animal Genomics and Bioinformatics Division, National Institute of Animal Science, RDA, Wanju, South Korea
| | - Steve Kemp
- Animal Biosciences, International Livestock Research Institute (ILRI), Nairobi, Kenya
| | - Marinus F W Te Pas
- Wageningen UR Livestock Research, Animal Breeding and Genomics, Wageningen, Netherlands
| | - Jun-Mo Kim
- Department of Animal Science and Technology, Chung-Ang University, Anseong, South Korea
| | - Jong-Eun Park
- Animal Genomics and Bioinformatics Division, National Institute of Animal Science, RDA, Wanju, South Korea
| |
Collapse
|
19
|
Korbecki J, Bobiński R, Dutka M. Self-regulation of the inflammatory response by peroxisome proliferator-activated receptors. Inflamm Res 2019; 68:443-458. [PMID: 30927048 PMCID: PMC6517359 DOI: 10.1007/s00011-019-01231-1] [Citation(s) in RCA: 194] [Impact Index Per Article: 38.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 02/24/2019] [Accepted: 03/22/2019] [Indexed: 12/14/2022] Open
Abstract
The peroxisome proliferator-activated receptor (PPAR) family includes three transcription factors: PPARα, PPARβ/δ, and PPARγ. PPAR are nuclear receptors activated by oxidised and nitrated fatty acid derivatives as well as by cyclopentenone prostaglandins (PGA2 and 15d-PGJ2) during the inflammatory response. This results in the modulation of the pro-inflammatory response, preventing it from being excessively activated. Other activators of these receptors are nonsteroidal anti-inflammatory drug (NSAID) and fatty acids, especially polyunsaturated fatty acid (PUFA) (arachidonic acid, ALA, EPA, and DHA). The main function of PPAR during the inflammatory reaction is to promote the inactivation of NF-κB. Possible mechanisms of inactivation include direct binding and thus inactivation of p65 NF-κB or ubiquitination leading to proteolytic degradation of p65 NF-κB. PPAR also exert indirect effects on NF-κB. They promote the expression of antioxidant enzymes, such as catalase, superoxide dismutase, or heme oxygenase-1, resulting in a reduction in the concentration of reactive oxygen species (ROS), i.e., secondary transmitters in inflammatory reactions. PPAR also cause an increase in the expression of IκBα, SIRT1, and PTEN, which interferes with the activation and function of NF-κB in inflammatory reactions.
Collapse
Affiliation(s)
- Jan Korbecki
- Department of Molecular Biology, School of Medicine in Katowice, Medical University of Silesia, Medyków 18 Str., 40-752, Katowice, Poland. .,Department of Biochemistry and Molecular Biology, Faculty of Health Sciences, University of Bielsko-Biala, Willowa 2 Str., 43-309, Bielsko-Biała, Poland.
| | - Rafał Bobiński
- Department of Biochemistry and Molecular Biology, Faculty of Health Sciences, University of Bielsko-Biala, Willowa 2 Str., 43-309, Bielsko-Biała, Poland
| | - Mieczysław Dutka
- Department of Biochemistry and Molecular Biology, Faculty of Health Sciences, University of Bielsko-Biala, Willowa 2 Str., 43-309, Bielsko-Biała, Poland
| |
Collapse
|
20
|
Chen Q, Zhou J, Zhang B, Chen Z, Luo Q, Song G. Cyclic Stretching Exacerbates Tendinitis by Enhancing NLRP3 Inflammasome Activity via F-Actin Depolymerization. Inflammation 2019; 41:1731-1743. [PMID: 29951874 DOI: 10.1007/s10753-018-0816-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Modern molecular techniques have highlighted the presence of inflammation throughout the spectrum of tendinopathy. Previous studies have suggested that excessive inflammation in the tendon is a major factor leading to poor clinical treatment. Furthermore, the NLRP3 inflammasome, as a new term, is closely associated with the pathogenesis of many diseases. In the present study, we examined whether the NLRP3 inflammasome contributes to the development of tendinitis and whether cyclic stretching plays a prominent role in inflammation in the tendon. In the present study, we showed that hydrogen peroxide (H2O2) remarkably enhances the expression and release of IL-1β, TNF-α, and IL-6. The maturation of IL-1β, induced by H2O2, depends on the activation of the NLRP3 inflammasome. Cyclic stretching enhances the maturation of IL-1β via promoting H2O2-induced NLRP3 inflammasome activation in tenocytes. Furthermore, we also found that the depolymerization of filamentous actin (F-actin) was required for cyclic stretching-enhanced NLRP3 inflammasome activation. The present study suggests that NLRP3 inflammasome plays an important regulatory role in the pathogenesis of tendinitis. Disruption of the cytoskeleton by cyclic stretching exerts a proinflammatory effect via further activating the NLRP3/IL-1β pathway and hence contributes to tendinitis. These results may provide theoretical support for a new treatment strategy for preventing excessive inflammation in the tendon.
Collapse
Affiliation(s)
- Qiufang Chen
- Key Laboratory of Biorheological Science and Technology, College of Bioengineering, Ministry of Education, Chongqing University, Chongqing, 400044, China
| | - Jun Zhou
- School of Life Science, Chongqing University, Chongqing, 400044, People's Republic of China
| | - Bingyu Zhang
- Key Laboratory of Biorheological Science and Technology, College of Bioengineering, Ministry of Education, Chongqing University, Chongqing, 400044, China
| | - Zhe Chen
- Key Laboratory of Biorheological Science and Technology, College of Bioengineering, Ministry of Education, Chongqing University, Chongqing, 400044, China
| | - Qing Luo
- Key Laboratory of Biorheological Science and Technology, College of Bioengineering, Ministry of Education, Chongqing University, Chongqing, 400044, China
| | - Guanbin Song
- Key Laboratory of Biorheological Science and Technology, College of Bioengineering, Ministry of Education, Chongqing University, Chongqing, 400044, China.
| |
Collapse
|
21
|
Li Q, Sun J, Mohammadtursun N, Wu J, Dong J, Li L. Curcumin inhibits cigarette smoke-induced inflammation via modulating the PPARγ-NF-κB signaling pathway. Food Funct 2019; 10:7983-7994. [PMID: 31773117 DOI: 10.1039/c9fo02159k] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The PPARγ-NF-κB signaling pathway is involved in the anti-inflammatory effect of curcumin on cigarette smoke-induced COPD models.
Collapse
Affiliation(s)
- Qiuping Li
- Department of Integrative Medicine
- Huashan Hospital
- Fudan University
- Shanghai 200040
- China
| | - Jing Sun
- Department of Integrative Medicine
- Huashan Hospital
- Fudan University
- Shanghai 200040
- China
| | | | - Jinfeng Wu
- Institutes of Dermatology
- Fudan University
- Shanghai 200040
- China
| | - Jingcheng Dong
- Department of Integrative Medicine
- Huashan Hospital
- Fudan University
- Shanghai 200040
- China
| | - Lulu Li
- Department of Integrative Medicine
- Huashan Hospital
- Fudan University
- Shanghai 200040
- China
| |
Collapse
|
22
|
Chu X, Wang Y, Pang L, Huang J, Sun X, Chen X. miR-130 aggravates acute myocardial infarction-induced myocardial injury by targeting PPAR-γ. J Cell Biochem 2018; 119:7235-7244. [PMID: 29761875 DOI: 10.1002/jcb.26903] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 03/28/2018] [Indexed: 12/26/2022]
Abstract
Cardiac remodeling is a common pathophysiological change associated with acute myocardial infarction (AMI). Recent evidence indicates that microRNAs are strong posttranscriptional regulators which play an important role in regulating the microenvironment of myocardial tissue after AMI. In this study, we sought to explore the potential role and underlying mechanism of miR-130 in AMI. H9c2 cells were cultured under hypoxic conditions to simulate myocardial infarction. The influence of aberrantly expressed miR-130 on H9c2 cells under hypoxia was also estimated with RT-PCR, western blot and enzyme-linked immunosorbent assay. Using bioinformatics methods, of miR-130 target genes were verified with luciferase reporter assay. Then, the effects of miR-130 on AMI were identified in an induced myocardial injury model in rats. The results show that miR-130 downregulation remarkably decreased hypoxia-induced inflammation and fibrosis related protein expression in H9c2 cells and reversed hypoxia-induced peroxisome proliferator-activated receptor γ (PPAR-γ) inhibition. A bifluorescein reporter assay further confirmed that PPAR-γ was a target gene of miR-130. This study verified that PPAR-γ has a cardioprotective effect by inhibiting NFκB-mediated inflammation and TGF-β1-mediated fibrosis. In vivo experiments confirmed that downregulation of miR-130 expression promotes PPAR-γ-mediated cardioprotective effects by suppressing inflammation and myocardial fibrosis. Taken together, these findings suggest that miR-130 knockdown alleviates infarction-induced myocardial injury by promoting PPAR-γ expression.
Collapse
Affiliation(s)
- Xianglin Chu
- Department of Cardiothoracic Surgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Yiqing Wang
- Department of Cardiothoracic Surgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Liewen Pang
- Department of Cardiothoracic Surgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Jiechun Huang
- Department of Cardiothoracic Surgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Xiaotian Sun
- Department of Cardiothoracic Surgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Xiaofeng Chen
- Department of Cardiothoracic Surgery, Huashan Hospital, Fudan University, Shanghai, China
| |
Collapse
|
23
|
Liu X, Li A, Ju Y, Liu W, Shi H, Hu R, Zhou Z, Sun X. β4GalT1 Mediates PPARγ N-Glycosylation to Attenuate Microglia Inflammatory Activation. Inflammation 2018; 41:1424-1436. [DOI: 10.1007/s10753-018-0789-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
24
|
Kim YA, Oh SH, Lee GH, Hoa PT, Jin SW, Chung YC, Lee YC, Jeong HG. Platycodon grandiflorum-derived saponin attenuates the eccentric exercise-induced muscle damage. Food Chem Toxicol 2018; 112:150-156. [DOI: 10.1016/j.fct.2017.12.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 12/20/2017] [Accepted: 12/22/2017] [Indexed: 01/11/2023]
|
25
|
A transcriptomic study of myogenic differentiation under the overexpression of PPARγ by RNA-Seq. Sci Rep 2017; 7:15308. [PMID: 29127356 PMCID: PMC5681552 DOI: 10.1038/s41598-017-14275-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 10/06/2017] [Indexed: 12/18/2022] Open
Abstract
To study the cellular and molecular function of peroxisome proliferator-activated receptor γ (PPARγ) in skeletal muscle differentiation, we have generated inducible gain-of-function to overexpress PPARγ in C2C12 myoblasts. In order to identify PPARγ targets, RNA sequencing (RNA-seq) was used to evaluate and quantify the transcriptomes and expression patterns during myogenic differentiation under the overexpression of PPARγ. The formation of myotubes and the expression of muscle-specific myogenic genes such as MyoD and MyoG may be inhibited by PPARγ overexpression. Multiple genes and pathways were significantly involved in this process, including 11 genes such as Fndc9 and Slc14a1 with fundamental change of regulation modes, 9 genes of which were validated by the data of qRT-PCR. Our studies demonstrate that PPARγ would play critical roles on myoblasts differentiation, mediating crosstalk among several pathways and transcription factors. Our data is available in the Gene Expression Omnibus (GEO) database with the accession number as GSE99399.
Collapse
|
26
|
Ginsenoside Rg1 attenuates adjuvant-induced arthritis in rats via modulation of PPAR-γ/NF-κB signal pathway. Oncotarget 2017; 8:55384-55393. [PMID: 28903427 PMCID: PMC5589666 DOI: 10.18632/oncotarget.19526] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 07/13/2017] [Indexed: 12/29/2022] Open
Abstract
Ginsenoside Rg1, the main active compound in Panax ginseng, has already been shown to have anti-inflammatory effects. However, the protective effects of Rg1 on rheumatoid arthritis (RA) remain unclear. The aim of the present study was to investigate the effects and mechanisms of Rg1 on adjuvant-induced arthritis (AIA) in rats. AIA rats were given Rg1 at doses of 5, 10, and 20 mg/kg intraperitoneally for 14 days to observe the anti-arthritic effects. The results showed that Rg1 significantly alleviated joint swelling and injuries. Rg1 can also significantly reduce the level of TNF-α and IL-6, increase PPAR-γ protein expression, inhibit IκBα phosphorylation and NF-κB nuclear translocation in the inflammatory joints of AIA rats and RAW264.7 cells stimulated by lipopolysaccharide (LPS). The results indicate that Rg1 has therapeutic effects on AIA rats, and the mechanism might be associated with its anti-inflammatory effects by up-regulating PPAR-γ and subsequent inhibition of NF-κB signal pathway.
Collapse
|