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Mapfumo PP, Reichel LS, André T, Hoeppener S, Rudolph LK, Traeger A. Optimizing Biocompatibility and Gene Delivery with DMAEA and DMAEAm: A Niacin-Derived Copolymer Approach. Biomacromolecules 2024. [PMID: 38963401 DOI: 10.1021/acs.biomac.4c00007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/05/2024]
Abstract
Gene therapy is pivotal in nanomedicine, offering a versatile approach to disease treatment. This study aims to achieve an optimal balance between biocompatibility and efficacy, which is a common challenge in the field. A copolymer library is synthesized, incorporating niacin-derived monomers 2-acrylamidoethyl nicotinate (AAEN) or 2-(acryloyloxy)ethyl nicotinate (AEN) with N,N-(dimethylamino)ethyl acrylamide (DMAEAm) or hydrolysis-labile N,N-(dimethylamino)ethyl acrylate (DMAEA). Evaluation of the polymers' cytotoxicity profiles reveals that an increase in AAEN or DMAEA molar ratios correlates with improved biocompatibility. Remarkably, an increase in AAEN in both DMAEA and DMAEAm copolymers demonstrated enhanced transfection efficiencies of plasmid DNA in HEK293T cells. Additionally, the top-performing polymers demonstrate promising gene expression in challenging-to-transfect cells (THP-1 and Jurkat cells) and show no significant effect on modulating immune response induction in ex vivo treated murine monocytes. Overall, the best performing candidates exhibit an optimal balance between biocompatibility and efficacy, showcasing potential advancements in gene therapy.
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Affiliation(s)
- Prosper P Mapfumo
- Institute of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, Jena 07743, Germany
| | - Liên S Reichel
- Institute of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, Jena 07743, Germany
| | - Thomas André
- Leibniz Institute on Aging-Fritz Lipmann Institute, Jena 07745, Germany
| | - Stephanie Hoeppener
- Institute of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, Jena 07743, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, Jena 07743, Germany
| | - Lenhard K Rudolph
- Leibniz Institute on Aging-Fritz Lipmann Institute, Jena 07745, Germany
| | - Anja Traeger
- Institute of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, Jena 07743, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, Jena 07743, Germany
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Rad EY, Saboori S, Tammam J, Thondre PS, Coe S. The effect of niacin on inflammatory markers and adipokines: a systematic review and meta-analysis of interventional studies. Eur J Nutr 2024:10.1007/s00394-024-03425-8. [PMID: 38761279 DOI: 10.1007/s00394-024-03425-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 05/08/2024] [Indexed: 05/20/2024]
Abstract
PURPOSE Niacin (nicotinic acid), known for its lipid-modifying effects, has been explored for its potential anti-inflammatory properties and potential to affect adipokines secretion from adipose tissue. The aim of this systematic review and meta-analysis was to assess the effects of niacin on inflammatory markers and adipokines. METHODS A comprehensive search was conducted across five databases: PubMed, Scopus, Cochrane Library, Embase, and ISI Web of Science. Randomized controlled trials exploring the effects of niacin on inflammatory markers (CRP, IL-6, TNF-α) and adipokines (Adiponectin, Leptin) were included. Pooled effect sizes were analysed using a random-effects model, and additional procedures including subgroup analyses, sensitivity analysis and dose-response analysis were also performed. RESULTS From an initial 1279 articles, fifteen randomized controlled trials (RCTs) were included. Niacin administration demonstrated a notable reduction in CRP levels (SMD: -0.88, 95% CI: -1.46 to -0.30, p = 0.003). Subgroup analyses confirmed CRP reductions in trials with intervention durations ≤ 24 weeks, doses ≤ 1000 mg/day, and elevated baseline CRP levels (> 3 mg/l). The meta-analysis of IL-6 and TNF-α revealed significant TNF-α reductions, while IL-6 reduction did not reach statistical significance. Niacin administration also substantially elevated Adiponectin (SMD: 3.52, 95% CI: 0.95 to 6.1, p = 0.007) and Leptin (SMD: 1.90, 95% CI: 0.03 to 3.77, p = 0.04) levels. CONCLUSION Niacin treatment is associated with significant reductions in CRP and TNF-α levels, suggesting potential anti-inflammatory effects. Additionally, niacin positively influences adipokines, increasing Adiponectin and Leptin levels. These findings provide insights for future research and clinical applications targeting inflammation and metabolic dysregulation.
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Affiliation(s)
- Esmaeil Yousefi Rad
- Oxford Brookes Centre for Nutrition and Health (OxBCNH), Department of Sport, Health Sciences and Social Work, Faculty of Health and Life Sciences, Oxford Brookes University, Gipsy Lane Campus, Headington, Oxford, OX3 0BP, UK
| | - Somayeh Saboori
- Oxford Brookes Centre for Nutrition and Health (OxBCNH), Department of Sport, Health Sciences and Social Work, Faculty of Health and Life Sciences, Oxford Brookes University, Gipsy Lane Campus, Headington, Oxford, OX3 0BP, UK
| | - Jonathan Tammam
- Oxford Brookes Centre for Nutrition and Health (OxBCNH), Department of Sport, Health Sciences and Social Work, Faculty of Health and Life Sciences, Oxford Brookes University, Gipsy Lane Campus, Headington, Oxford, OX3 0BP, UK
| | - Pariyarath Sangeetha Thondre
- Oxford Brookes Centre for Nutrition and Health (OxBCNH), Department of Sport, Health Sciences and Social Work, Faculty of Health and Life Sciences, Oxford Brookes University, Gipsy Lane Campus, Headington, Oxford, OX3 0BP, UK
| | - Shelly Coe
- Oxford Brookes Centre for Nutrition and Health (OxBCNH), Department of Sport, Health Sciences and Social Work, Faculty of Health and Life Sciences, Oxford Brookes University, Gipsy Lane Campus, Headington, Oxford, OX3 0BP, UK.
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Wadie W, Mohamed SS, Abd El-Haleim EA, Khayyal MT. Niacin modulates depressive-like behavior in experimental colitis through GPR109A-dependent mechanisms. Life Sci 2023; 330:122004. [PMID: 37544378 DOI: 10.1016/j.lfs.2023.122004] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 07/25/2023] [Accepted: 08/03/2023] [Indexed: 08/08/2023]
Abstract
AIMS Depression is one of the common neurological comorbidities in patients with inflammatory bowel disease (IBD). The current study aimed to investigate the potential impact of niacin on colitis-induced depressive-like behavior in rats. MATERIALS AND METHODS Animals were given 5 % dextran sulfate sodium (DSS) in drinking water for one week to induce colitis. Niacin (80 mg/kg), with or without mepenzolate bromide (GPR109A blocker), was administered once per day throughout the experimental period. Rats were tested for behavioral changes using open field and forced swimming tests. KEY FINDINGS Niacin significantly ameliorated DSS-induced behavioral deficits and alleviated macroscopic and microscopic colonic inflammatory changes. It also augmented the hippocampal levels of ZO-1, occludin, and claudin-5 proteins, indicating the ability of niacin to restore the blood-brain barrier (BBB) integrity. Moreover, niacin decreased hippocampal IL-1ꞵ and NF-ĸB contents but increased GSH, Sirt-1, Nrf-2, HO-1 concentrations. All these beneficial effects were partially abolished by the co-administration of mepenzolate bromide. SIGNIFICANCE The neuroprotective effect of niacin against DSS-induced depressive-like behavior was partially mediated through GPR109A-mediated mechanisms. Such mechanisms are also involved in modulating neuronal oxidative stress and inflammation via Sirt-1/Nrf-2/HO-1 signaling pathways.
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Affiliation(s)
- Walaa Wadie
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Egypt.
| | - Sarah S Mohamed
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Egypt
| | - Enas A Abd El-Haleim
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Egypt
| | - Mohamed T Khayyal
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Egypt
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Wang X, Shen Y, Shang M, Liu X, Munn LL. Endothelial mechanobiology in atherosclerosis. Cardiovasc Res 2023; 119:1656-1675. [PMID: 37163659 PMCID: PMC10325702 DOI: 10.1093/cvr/cvad076] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 02/11/2023] [Accepted: 02/21/2023] [Indexed: 05/12/2023] Open
Abstract
Cardiovascular disease (CVD) is a serious health challenge, causing more deaths worldwide than cancer. The vascular endothelium, which forms the inner lining of blood vessels, plays a central role in maintaining vascular integrity and homeostasis and is in direct contact with the blood flow. Research over the past century has shown that mechanical perturbations of the vascular wall contribute to the formation and progression of atherosclerosis. While the straight part of the artery is exposed to sustained laminar flow and physiological high shear stress, flow near branch points or in curved vessels can exhibit 'disturbed' flow. Clinical studies as well as carefully controlled in vitro analyses have confirmed that these regions of disturbed flow, which can include low shear stress, recirculation, oscillation, or lateral flow, are preferential sites of atherosclerotic lesion formation. Because of their critical role in blood flow homeostasis, vascular endothelial cells (ECs) have mechanosensory mechanisms that allow them to react rapidly to changes in mechanical forces, and to execute context-specific adaptive responses to modulate EC functions. This review summarizes the current understanding of endothelial mechanobiology, which can guide the identification of new therapeutic targets to slow or reverse the progression of atherosclerosis.
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Affiliation(s)
- Xiaoli Wang
- Institute of Biomedical Engineering, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, China
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310020, China
| | - Yang Shen
- Institute of Biomedical Engineering, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, China
| | - Min Shang
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310020, China
| | - Xiaoheng Liu
- Institute of Biomedical Engineering, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, China
| | - Lance L Munn
- Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
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Sidor K, Jeznach A, Hoser G, Skirecki T. 1-Methylnicotinamide (1-MNA) inhibits the activation of the NLRP3 inflammasome in human macrophages. Int Immunopharmacol 2023; 121:110445. [PMID: 37290319 DOI: 10.1016/j.intimp.2023.110445] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 05/22/2023] [Accepted: 06/01/2023] [Indexed: 06/10/2023]
Abstract
The NLRP3 inflammasome is among the most potent intracellular sensors of danger and disturbances of cellular homeostasis that can lead to the release of IL-1β and cell death, or pyroptosis. Despite its protective role, this mechanism is involved in the pathogenesis of numerous inflammatory diseases; therefore, it is seen as a potential therapeutic target. 1-methylnicotinamide (1-MNA) is a direct metabolite of nicotinamide and was previously shown to display several immunomodulatory properties, including a reduction in the reactive oxygen species (ROS). Here, we investigated whether 1-MNA could influence the activation of the NLRP3 inflammasome in human macrophages. In differentiated human macrophages we observed that 1-MNA specifically reduced the activation of the NLRP3 inflammasome. This effect was related to the scavenging of ROS, as exogenous H2O2 was able to restore NLRP3 activation. Additionally, 1-MNA increased the mitochondrial membrane potential, indicating that it did not inhibit oxidative phosphorylation. Moreover, at high but not low concentrations, 1-MNA decreased NF-κB activation and the level of pro-IL-1β. Interestingly, 1-MNA did not reduce the secretion of IL-6 upon endotoxin stimulation, confirming that its primary immunomodulatory effect on human macrophages is dependent on the NLRP3 inflammasome. Taken together, we have shown for the first time that 1-MNA reduced the activation of the NLRP3 inflammasome in human macrophages via an ROS-dependent pathway. Our results indicate a novel potential use of 1-MNA in NLRP3-related disorders.
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Affiliation(s)
- Karolina Sidor
- Department of Translational Immunology and Experimental Intensive Care, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - Aldona Jeznach
- Department of Translational Immunology and Experimental Intensive Care, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - Grażyna Hoser
- Department of Translational Immunology and Experimental Intensive Care, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - Tomasz Skirecki
- Department of Translational Immunology and Experimental Intensive Care, Centre of Postgraduate Medical Education, Warsaw, Poland.
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Ibrahim WW, Sayed RH, Kandil EA, Wadie W. Niacin mitigates blood-brain barrier tight junctional proteins dysregulation and cerebral inflammation in ketamine rat model of psychosis: Role of GPR109A receptor. Prog Neuropsychopharmacol Biol Psychiatry 2022; 119:110583. [PMID: 35690118 DOI: 10.1016/j.pnpbp.2022.110583] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 06/05/2022] [Accepted: 06/05/2022] [Indexed: 01/25/2023]
Abstract
Dysregulated inflammatory responses and blood-brain barrier (BBB) dysfunction are recognized as central factors in the development of psychiatric disorders. The present study was designed to evaluate the effect of niacin on BBB integrity in ketamine-induced model of psychosis. Meanwhile, mepenzolate bromide (MPN), a GPR109A receptor blocker, was used to investigate the role of this receptor on the observed niacin's effect. Male Wistar rats received ketamine (30 mg/kg/day, i.p) for 5 consecutive days and then niacin (40 mg/kg/day, p.o), with or without MPN (5 mg/kg/day, i.p), was given for the subsequent 15 days. Three days before the end of experiment, rats were behaviorally tested using open field, novel object recognition, social interaction, and forced swimming tests. Niacin significantly ameliorated ketamine-induced behavioral deficits, amended gamma aminobutyric acid and glutamate concentration, decreased tumor necrosis factor-α and matrix metallopeptidase 9 levels, and increased netrin-1 contents in the hippocampus of rats. Niacin also augmented the hippocampal expression of ZO-1, occludin, and claudin-5 proteins, indicating the ability of niacin to restore the BBB integrity. Moreover, the histopathologic changes in hippocampal neurons were alleviated. Since all the beneficial effects of niacin in the present investigation were partially abolished by the co-administration of MPN; GPR109A receptor was proven to partially mediate the observed antipsychotic effects of niacin. These data revealed that GPR109A-mediated signaling pathways might represent potential targets for therapeutic interventions to prevent or slow the progression of psychosis.
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Affiliation(s)
- Weam W Ibrahim
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Egypt
| | - Rabab H Sayed
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Egypt.
| | - Esraa A Kandil
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Egypt
| | - Walaa Wadie
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Egypt
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Elmaidomy AH, Mohamed EM, Aly HF, Younis EA, Shams SGE, Altemani FH, Alzubaidi MA, Almaghrabi M, Harbi AA, Alsenani F, Sayed AM, Abdelmohsen UR. Anti-Inflammatory and Antioxidant Properties of Malapterurus electricus Skin Fish Methanolic Extract in Arthritic Rats: Therapeutic and Protective Effects. Mar Drugs 2022; 20:639. [PMID: 36286462 PMCID: PMC9604635 DOI: 10.3390/md20100639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/05/2022] [Accepted: 10/12/2022] [Indexed: 11/04/2022] Open
Abstract
The protective and therapeutic anti-inflammatory and antioxidant potency of Malapterurus electricus (F. Malapteruridae) skin fish methanolic extract (FE) (300 mg/kg.b.wt/day for 7 days, orally) was tested in monosodium urate(MSU)-induced arthritic Wistar albino male rats' joints. Serum uric acid, TNF-α, IL-1β, NF-𝜅B, MDA, GSH, catalase, SOD, and glutathione reductase levels were all measured. According to the findings, FE significantly reduced uric acid levels and ankle swelling in both protective and therapeutic groups. Furthermore, it has anti-inflammatory effects by downregulating inflammatory cytokines, primarily through decreased oxidative stress and increased antioxidant status. All the aforementioned lesions were significantly improved in protected and treated rats with FE, according to histopathological findings. iNOS immunostaining revealed that protected and treated arthritic rats with FE had weak positive immune-reactive cells. Phytochemical analysis revealed that FE was high in fatty and amino acids. The most abundant compounds were vaccenic (24.52%), 9-octadecenoic (11.66%), palmitic (34.66%), stearic acids (14.63%), glycine (0.813 mg/100 mg), and alanine (1.645 mg/100 mg). Extensive molecular modelling and dynamics simulation experiments revealed that compound 4 has the potential to target and inhibit COX isoforms with a higher affinity for COX-2. As a result, we contend that FE could be a promising protective and therapeutic option for arthritis, aiding in the prevention and progression of this chronic inflammatory disease.
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Affiliation(s)
- Abeer H. Elmaidomy
- Department of Pharmacognosy, Faculty of Pharmacy, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Esraa M. Mohamed
- Department of Pharmacognosy, Faculty of Pharmacy, MUST, Giza 12566, Egypt
| | - Hanan F. Aly
- Department of Therapeutic Chemistry, Pharmaceutical and Drug Industries Research Institute, National Research Centre, El Bouhouth St., Dokki, Giza 12622, Egypt
| | - Eman A. Younis
- Department of Therapeutic Chemistry, Pharmaceutical and Drug Industries Research Institute, National Research Centre, El Bouhouth St., Dokki, Giza 12622, Egypt
| | - Shams Gamal Eldin Shams
- Department of Therapeutic Chemistry, Pharmaceutical and Drug Industries Research Institute, National Research Centre, El Bouhouth St., Dokki, Giza 12622, Egypt
| | - Faisal H. Altemani
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, University of Tabuk, Tabuk 71491, Saudi Arabia
| | - Mubarak A. Alzubaidi
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Mohammed Almaghrabi
- Pharmacognosy and Pharmaceutical Chemistry Department, Faculty of Pharmacy, Taibah University, Al Madinah Al Munawarah 42353, Saudi Arabia
| | - Adnan Al Harbi
- Clinical Pharmacy Department, College of Pharmacy, Umm Al-Qura University, Makkah 21955, Saudi Arabia
| | - Faisal Alsenani
- Department of Pharmacognosy, College of Pharmacy, Umm Al-Qura University, Makkah 21955, Saudi Arabia
| | - Ahmed M. Sayed
- Department of Pharmacognosy, Faculty of Pharmacy, Nahda University, Beni-Suef 62513, Egypt
| | - Usama Ramadan Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia 61519, Egypt
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, 7 Universities Zone, New Minia 61111, Egypt
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He L, Zhang CL, Chen Q, Wang L, Huang Y. Endothelial shear stress signal transduction and atherogenesis: From mechanisms to therapeutics. Pharmacol Ther 2022; 235:108152. [PMID: 35122834 DOI: 10.1016/j.pharmthera.2022.108152] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 01/13/2022] [Accepted: 01/27/2022] [Indexed: 10/19/2022]
Abstract
Atherosclerotic vascular disease and its complications are among the top causes of mortality worldwide. In the vascular lumen, atherosclerotic plaques are not randomly distributed. Instead, they are preferentially localized at the curvature and bifurcations along the arterial tree, where shear stress is low or disturbed. Numerous studies demonstrate that endothelial cell phenotypic change (e.g., inflammation, oxidative stress, endoplasmic reticulum stress, apoptosis, autophagy, endothelial-mesenchymal transition, endothelial permeability, epigenetic regulation, and endothelial metabolic adaptation) induced by oscillatory shear force play a fundamental role in the initiation and progression of atherosclerosis. Mechano-sensors, adaptor proteins, kinases, and transcriptional factors work closely at different layers to transduce the shear stress force from the plasma membrane to the nucleus in endothelial cells, thereby controlling the expression of genes that determine cell fate and phenotype. An in-depth understanding of these mechano-sensitive signaling cascades shall provide new translational strategies for therapeutic intervention of atherosclerotic vascular disease. This review updates the recent advances in endothelial mechano-transduction and its role in the pathogenesis of atherosclerosis, and highlights the perspective of new anti-atherosclerosis therapies through targeting these mechano-regulated signaling molecules.
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Affiliation(s)
- Lei He
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, China
| | - Cheng-Lin Zhang
- Department of Pathophysiology, School of Basic Medical Sciences, Shenzhen University Health Science Center, Shenzhen 518060, China; Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong, China
| | - Qinghua Chen
- Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, China
| | - Li Wang
- Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, China
| | - Yu Huang
- Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, China.
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Modified Yuejuwan Inhibited Cholesterol Accumulation and Inflammation in THP-1 Macrophage-Derived Foam Cells by Inhibiting the Activity of the TRIM37/TRAF2/NF- κB Pathway. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:6400517. [PMID: 35310029 PMCID: PMC8930229 DOI: 10.1155/2022/6400517] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 01/25/2022] [Indexed: 01/25/2023]
Abstract
Background This study aimed to explore the function of modified Yuejuwan (MYJ) on THP-1 macrophage-derived foam cells. Methods First, human THP-cells were obtained, and then, grouping was made to the following: control group, foaming group, foaming group +0.2 mg/mL Jiawei Yueju pill, foaming group +0.5 mg/mL Jiawei Yueju pill, and foaming group +1 mg/mL Jiawei Yueju pill. An Oil Red O staining assay was used to examine the uptake of oxidatively modified low-density lipoprotein (oxLDL). The secretion of interleukin (IL)-1β and tumor necrosis factor (TNF)-α were determined using an enzyme-linked immunosorbent assay (ELISA). Real-time quantitative PCR (qRT-PCR) and Western blot were used to quantify genes and proteins expression levels. Results Our results indicated that MYJ inhibited the accumulation of total cholesterol (TC), free cholesterol (FC), and cholesteryl ester (CE) in foam cells. Moreover, the secretion of IL-1β and TNF-α also downregulated in foam cells after treatment of MYJ. Furthermore, we found that tripartite motif-containing 37 (TRIM37) was significantly upregulated in foam cells. Knockdown of TRIM37 promoted cholesterol efflux and presented an anti-inflammation effect in foam cells. Furthermore, TRIM37 positively mediated the translocation of NF-κB to nuclear. It negatively regulated its ubiquitination in foam cells after interacting with TRAF2. Importantly, MYJ profoundly suppressed the function of TRIM37 in foam cells and functioned as a TRIM37 inhibitor. Conclusions This study demonstrated that MYJ might alleviate oxLDL-induced foam cell formation by inhibiting the TRIM37/TRAF2/NF-κB pathway activity. MYJ was a potential agent in preventing atherosclerosis and indicated its potential signaling pathway in foam cells.
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Exploring the Immune-Boosting Functions of Vitamins and Minerals as Nutritional Food Bioactive Compounds: A Comprehensive Review. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27020555. [PMID: 35056870 PMCID: PMC8779769 DOI: 10.3390/molecules27020555] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 01/04/2022] [Accepted: 01/10/2022] [Indexed: 02/06/2023]
Abstract
Food components have long been recognized to play a fundamental role in the growth and development of the human body, conferring protective functionalities against foreign matter that can be severe public health problems. Micronutrients such as vitamins and minerals are essential to the human body, and individuals must meet their daily requirements through dietary sources. Micronutrients act as immunomodulators and protect the host immune response, thus preventing immune evasion by pathogenic organisms. Several experimental investigations have been undertaken to appraise the immunomodulatory functions of vitamins and minerals. Based on these experimental findings, this review describes the immune-boosting functionalities of micronutrients and the mechanisms of action through which these functions are mediated. Deficiencies of vitamins and minerals in plasma concentrations can lead to a reduction in the performance of the immune system functioning, representing a key contributor to unfavorable immunological states. This review provides a descriptive overview of the characteristics of the immune system and the utilization of micronutrients (vitamins and minerals) in preventative strategies designed to reduce morbidity and mortality among patients suffering from immune invasions or autoimmune disorders.
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Etiology of Colitis-Complex Diarrhea in Growing Pigs: A Review. Animals (Basel) 2021; 11:ani11072151. [PMID: 34359279 PMCID: PMC8300613 DOI: 10.3390/ani11072151] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 07/13/2021] [Accepted: 07/14/2021] [Indexed: 12/12/2022] Open
Abstract
Simple Summary Diarrhea in growing pigs is a challenge for the pig industry since it is associated with reduced animal welfare, retarded growth, increased feed conversion ratio, and is often treated with antibiotics. One of the major causes of diarrhea in the growing period is large intestinal inflammation, often referred to as colitis. The exact causes of colitis-complex diarrhea are still to be understood, but dietary factors and/or pathogens have been recognized as the major factors in developing colitis-complex diarrhea. In this review, a thorough picture of pathogens, dietary factors, and a number of possible biomarkers related to colitis-complex diarrhea is presented. Abstract Colitis-complex diarrhea (CCD) in pigs can be defined as a type of diarrhea, which is associated with colonic inflammation and disrupted colonic gut barrier functionality in growing pigs (4–16 weeks post-weaning). It is a challenge for the pig industry as it is associated with the high use of antibiotics, reduced animal welfare, and depressed growth rate. The exact etiology of CCD is still unclear; however, pathogens including Brachyspira (B.) hyodysenteriae, B. pilosicoli, and swine whipworms such as Trichuris (T.) suis have been involved in specific colitis (SC). In the absence of specific pathogens, dietary factors, such as high levels of protein, pelleted feedstuffs, and lack of sufficient antioxidants, can result in non-specific colitis (NSC). On the other hand, supplement of polyunsaturated fatty acids (PUFA) and polyphenols, sufficient supply of essential amino acids (e.g., threonine, cysteine, and proline), short-chain fatty acids (SCFA; especially butyrate), and resistant starch have shown to confer preventing/ameliorating effects on CCD. Different putative biomarkers associated with CCD have been presented. It is anticipated that a comprehensive picture of the possible causes of CCD and potential dietary interventions could cast light on the direction of future studies aimed at developing preventive and curative strategies against CCD in growing pigs.
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Precision Nutrition for Alzheimer's Prevention in ApoE4 Carriers. Nutrients 2021; 13:nu13041362. [PMID: 33921683 PMCID: PMC8073598 DOI: 10.3390/nu13041362] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 04/13/2021] [Accepted: 04/16/2021] [Indexed: 12/14/2022] Open
Abstract
The ApoE4 allele is the most well-studied genetic risk factor for Alzheimer’s disease, a condition that is increasing in prevalence and remains without a cure. Precision nutrition targeting metabolic pathways altered by ApoE4 provides a tool for the potential prevention of disease. However, no long-term human studies have been conducted to determine effective nutritional protocols for the prevention of Alzheimer’s disease in ApoE4 carriers. This may be because relatively little is yet known about the precise mechanisms by which the genetic variant confers an increased risk of dementia. Fortunately, recent research is beginning to shine a spotlight on these mechanisms. These new data open up the opportunity for speculation as to how carriers might ameliorate risk through lifestyle and nutrition. Herein, we review recent discoveries about how ApoE4 differentially impacts microglia and inflammatory pathways, astrocytes and lipid metabolism, pericytes and blood–brain barrier integrity, and insulin resistance and glucose metabolism. We use these data as a basis to speculate a precision nutrition approach for ApoE4 carriers, including a low-glycemic index diet with a ketogenic option, specific Mediterranean-style food choices, and a panel of seven nutritional supplements. Where possible, we integrate basic scientific mechanisms with human observational studies to create a more complete and convincing rationale for this precision nutrition approach. Until recent research discoveries can be translated into long-term human studies, a mechanism-informed practical clinical approach may be useful for clinicians and patients with ApoE4 to adopt a lifestyle and nutrition plan geared towards Alzheimer’s risk reduction.
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Wei T, Liu J, Zhang D, Wang X, Li G, Ma R, Chen G, Lin X, Guo X. The Relationship Between Nutrition and Atherosclerosis. Front Bioeng Biotechnol 2021; 9:635504. [PMID: 33959594 PMCID: PMC8094392 DOI: 10.3389/fbioe.2021.635504] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 03/19/2021] [Indexed: 01/07/2023] Open
Abstract
Atherosclerosis is the basic pathological process of many diseases, such as coronary atherosclerosis and stroke. Nutrients can affect the occurrence and development of atherosclerosis. At present, in nutrition science, the research on atherosclerosis focuses on which nutrients play an important role in its prevention strategy, and what are the possible mechanisms of its action. In the current study, the process of atherosclerosis can be affected by adjusting the proportion of nutrients in the diet. In this review, we pay attention to the effects of phytosterols, omega-3-polyunsaturated fatty acids, polyphenol, vitamin, and other nutrients on atherosclerosis, pay attention to their current epidemiological status, current nutritional research results, and prevention or a possible mechanism to reduce the risk of development of atherosclerosis. So that more personalized nutritional approaches may be more effective in terms of nutritional intervention responses to atherosclerosis.
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Affiliation(s)
- Taotao Wei
- Department of Cardiology, Lanzhou University Second Hospital, Lanzhou University, Lanzhou, China
| | - Junnan Liu
- Lanzhou University Second Hospital, The Second Clinical Medical College of Lanzhou University, Lanzhou, China
| | - Demei Zhang
- Lanzhou University Second Hospital, The Second Clinical Medical College of Lanzhou University, Lanzhou, China
| | - Xiaomei Wang
- Lanzhou University Second Hospital, The Second Clinical Medical College of Lanzhou University, Lanzhou, China
| | - Guangling Li
- Lanzhou University Second Hospital, The Second Clinical Medical College of Lanzhou University, Lanzhou, China
| | - Ruchao Ma
- Department of Cardiology, Lanzhou University Second Hospital, Lanzhou University, Lanzhou, China
| | - Gang Chen
- Department of Cardiology, Lanzhou University Second Hospital, Lanzhou University, Lanzhou, China
| | - Xin Lin
- Department of Cardiology, Lanzhou University Second Hospital, Lanzhou University, Lanzhou, China
| | - Xueya Guo
- Department of Cardiology, Lanzhou University Second Hospital, Lanzhou University, Lanzhou, China.,Lanzhou University Second Hospital, The Second Clinical Medical College of Lanzhou University, Lanzhou, China
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Li R, Li Y, Liang X, Yang L, Su M, Lai KP. Network Pharmacology and bioinformatics analyses identify intersection genes of niacin and COVID-19 as potential therapeutic targets. Brief Bioinform 2021; 22:1279-1290. [PMID: 33169132 PMCID: PMC7717147 DOI: 10.1093/bib/bbaa300] [Citation(s) in RCA: 89] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 10/06/2020] [Accepted: 10/07/2020] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVES Patients with colorectal cancer (CRC) may be susceptible to the coronavirus disease-2019 (COVID-19). However, anti-CRC/COVID-19 treatment options are currently unavailable. Since niacin is a vitamin with cytoprotective and anti-inflammatory functions, this study aimed to evaluate the possible functional roles and underlying mechanisms of action of niacin as an anti-COVID-19 and -CRC therapy. INTERVENTIONS We used a series of network pharmacology-based and computational analyses to understand and characterize the binding capacity, biological functions, pharmacological targets and therapeutic mechanisms of niacin in CRC/COVID-19. MEASUREMENTS AND MAIN RESULTS We revealed the clinical characteristics of CRC patients and COVID-19 patients, including predisposing genes, survival rate and prognosis. Moreover, the results of molecular docking analysis indicated that niacin exerted effective binding capacity in COVID-19. Further, we disclosed the targets, biological functions and signaling pathways of niacin in CRC/COVID-19. The analysis indicated that niacin could help in treating CRC/COVID-19 through cytoprotection, enhancement of immunologic functions, inhibition of inflammatory reactions and regulation of cellular microenvironment. Furthermore, five core pharmacological targets of niacin in CRC/COVID-19 were also identified, including BCL2L1, PTGS2, IL1B, IFNG and SERPINE1. CONCLUSIONS This study, for the first time, revealed the niacin-associated molecular functions and pharmacological targets for treating CRC/COVID-19, as COVID-19 remains a serious pandemic. But the findings were not validated in actual CRC patients infected with COVID-19, so further investigation is needed to confirm the potential use of niacin for treating CRC/COVID-19.
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Affiliation(s)
| | - Yu Li
- Gyuilin Medical University
| | | | | | - Min Su
- Gyuilin Medical University
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15
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Kim MH, Kim DH, Yang SG, Kim DY. Improved effect of a mitochondria-targeted antioxidant on hydrogen peroxide-induced oxidative stress in human retinal pigment epithelium cells. BMC Pharmacol Toxicol 2021; 22:7. [PMID: 33472699 PMCID: PMC7819191 DOI: 10.1186/s40360-020-00471-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Accepted: 12/27/2020] [Indexed: 01/04/2023] Open
Abstract
Background Oxidative damage to retinal pigment epithelial (RPE) cells contributes to the development of age-related macular degeneration, which is among the leading causes of visual loss in elderly people. In the present study, we evaluated the protective role of triphenylphosphonium (TPP)-Niacin against hydrogen peroxide (H2O2)-induced oxidative stress in RPE cells. Methods The cellular viability, lactate dehydrogenase release, reactive oxygen species (ROS) generation, and mitochondrial function of retinal ARPE-19 cells were determined under treatment with H2O2 or pre-treatment with TPP-Niacin. The expression level of mitochondrial related genes and some transcription factors were assessed using real-time polymerase chain reaction (RT-qPCR). Results TPP-Niacin significantly improved cell viability, reduced ROS generation, and increased the antioxidant enzymes in H2O2-treated ARPE-19 cells. Mitochondrial dysfunction from the H2O2-induced oxidative stress was also considerably diminished by TPP-Niacin treatment, along with reduction of the mitochondrial membrane potential (MMP) and upregulation of the mitochondrial-associated gene. In addition, TPP-Niacin markedly enhanced the expression of transcription factors (PGC-1α and NRF2) and antioxidant-associated genes (especially HO-1 and NQO-1). Conclusion We verified the protective effect of TPP-Niacin against H2O2-induced oxidative stress in RPE cells. TPP-Niacin is believed to protect against mitochondrial dysfunction by upregulating antioxidant-related genes, such as PGC-1α, NRF2, HO-1, and NQO-1, in RPE cells. Supplementary Information The online version contains supplementary material available at 10.1186/s40360-020-00471-w.
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Affiliation(s)
- Myung Hee Kim
- Inha Research Institute for Aerospace Medicine, Inha University, Incheon, 22212, South Korea
| | - Do-Hun Kim
- Inha Research Institute for Aerospace Medicine, Inha University, Incheon, 22212, South Korea.,Department of Biomedical Science, BK21 FOUR Program in Biomedical Science & Engineering, Inha University College of Medicine, Incheon, 22332, South Korea
| | - Su Geun Yang
- Inha Research Institute for Aerospace Medicine, Inha University, Incheon, 22212, South Korea. .,Department of Biomedical Science, BK21 FOUR Program in Biomedical Science & Engineering, Inha University College of Medicine, Incheon, 22332, South Korea.
| | - Dae Yu Kim
- Inha Research Institute for Aerospace Medicine, Inha University, Incheon, 22212, South Korea. .,Department of Electrical Engineering, College of Engineering, Inha University, Incheon, 22212, South Korea. .,Center for Sensor Systems, Inha University, Incheon, 22212, South Korea.
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16
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Modulatory Effect of Nicotinic Acid on the Metabolism of Caco-2 Cells Exposed to IL-1β and LPS. Metabolites 2020; 10:metabo10050204. [PMID: 32429415 PMCID: PMC7281454 DOI: 10.3390/metabo10050204] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/11/2020] [Accepted: 05/14/2020] [Indexed: 12/27/2022] Open
Abstract
Inflammatory bowel diseases (IBD) are the most common gastrointestinal inflammatory pathologies. Previous work evidenced a lower content of nicotinic acid (NA) in feces of IBD patients compared to healthy subjects. In the present study, we aimed to understand the effects of NA on intestinal inflammation, as several studies reported its possible beneficial effect, and investigate its influence on inflammation-driven metabolism. NA was tested on a Caco-2 in-vitro model in which inflammation was induced with interleukin-1β (IL-1β) and lipopolysaccharide (LPS), two mayor proinflammatory compounds produced in IBD, that stimulate the production of cytokines, such as interleukin 8. A metabolomics approach, with gas chromatography–mass spectrometry (GC-MS) and nuclear proton magnetic resonance (1H-NMR), was applied to study the metabolic changes. The results showed that NA significantly reduced the level of IL-8 produced in both LPS and IL-1β stimulated cells, confirming the anti-inflammatory effect of NA also on intestinal inflammation. Moreover, it was demonstrated that NA treatment had a restoring effect on several metabolites whose levels were modified by treatments with IL-1β or LPS. This study points out a possible use of NA as anti-inflammatory compound and might be considered as a promising starting point in understanding the beneficial effect of NA in IBD.
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Zakeri Siavashani A, Mohammadi J, Maniura-Weber K, Senturk B, Nourmohammadi J, Sadeghi B, Huber L, Rottmar M. Silk based scaffolds with immunomodulatory capacity: anti-inflammatory effects of nicotinic acid. Biomater Sci 2020; 8:148-162. [DOI: 10.1039/c9bm00814d] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Here we show that 3D silk scaffolds loaded with nicotinic acid have great potential for tissue engineering due to their excellent cytocompatibility and ability to decrease the expression of proinflammatory markers in a concentration dependent manner.
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Affiliation(s)
| | - Javad Mohammadi
- Faculty of New Sciences and Technologies
- University of Tehran
- Tehran
- Iran
| | - Katharina Maniura-Weber
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Biointerfaces
- St.Gallen
- Switzerland
| | - Berna Senturk
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Biointerfaces
- St.Gallen
- Switzerland
| | | | - Behnam Sadeghi
- Translational Cell therapy Research (TCR)
- Department of CLINTEC
- Karolinska Institutet
- Stockholm
- Sweden
| | - Lukas Huber
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Laboratory for Building Energy Materials and Components
- Dübendorf
- Switzerland
| | - Markus Rottmar
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Biointerfaces
- St.Gallen
- Switzerland
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Romani M, Hofer DC, Katsyuba E, Auwerx J. Niacin: an old lipid drug in a new NAD + dress. J Lipid Res 2019; 60:741-746. [PMID: 30782960 PMCID: PMC6446705 DOI: 10.1194/jlr.s092007] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Indexed: 12/29/2022] Open
Abstract
Niacin, the first antidyslipidemic drug, has been at the center stage of lipid research for many decades before the discovery of statins. However, to date, despite its remarkable effects on lipid profiles, the clinical outcomes of niacin treatment on cardiac events is still debated. In addition to its historically well-defined interactions with central players of lipid metabolism, niacin can be processed by eukaryotic cells to synthesize a crucial cofactor, NAD+ NAD+ acts as a cofactor in key cellular processes, including oxidative phosphorylation, glycolysis, and DNA repair. More recently, evidence has emerged that NAD+ also is an essential cosubstrate for the sirtuin family of protein deacylases and thereby has an impact on a wide range of cellular processes, most notably mitochondrial homeostasis, energy homeostasis, and lipid metabolism. NAD+ achieves these remarkable effects through sirtuin-mediated deacetylation of key transcriptional regulators, such as peroxisome proliferator-activated receptor gamma coactivator 1-α, LXR, and SREBPs, that control these cellular processes. Here, we present an alternative point of view to explain niacin's mechanism of action, with a strong focus on the importance of how this old drug acts as a control switch of NAD+/sirtuin-mediated control of metabolism.
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Affiliation(s)
- Mario Romani
- Laboratory of Integrative Systems Physiology, Interfaculty Institute of Bioengineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Dina Carina Hofer
- Laboratory of Integrative Systems Physiology, Interfaculty Institute of Bioengineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Elena Katsyuba
- Laboratory of Integrative Systems Physiology, Interfaculty Institute of Bioengineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Johan Auwerx
- Laboratory of Integrative Systems Physiology, Interfaculty Institute of Bioengineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
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Subramani K, Chu X, Warren M, Lee M, Lu S, Singh N, Raju R. Deficiency of metabolite sensing receptor HCA2 impairs the salutary effect of niacin in hemorrhagic shock. Biochim Biophys Acta Mol Basis Dis 2019; 1865:688-695. [PMID: 30625381 DOI: 10.1016/j.bbadis.2019.01.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 12/10/2018] [Accepted: 01/04/2019] [Indexed: 12/28/2022]
Abstract
Inflammation and cellular energetics play critical roles in organ dysfunction following hemorrhagic shock. Recent studies suggest a putative role for sirtuin 1 (SIRT1) in potentiating mitochondrial function and improving organ function following hemorrhagic shock in animal models. SIRT1 is an NAD+ dependent protein deacetylase and increased availability of NAD+ has been shown to augment SIRT1 activity. As niacin is a precursor of NAD+, in this study, we tested whether niacin can improve survival following hemorrhagic shock. However niacin also mediates its biological action by binding to its receptor, hydroxyl-carboxylic acid receptor 2 (HCA2 or Gpr109a); so we examined whether the effect of niacin is mediated by binding to Gpr109a or by increasing NAD+ availability. We found that niacin administered intravenously to rats subjected to hemorrhagic injury (HI) in the absence of fluid resuscitation resulted in a significantly prolonged duration of survival. However, treatment of rats with similar doses of nicotinamide mononucleotide (NMN), a precursor to NAD+ that does not bind Gpr109a, did not extend survival following HI. The duration of survival due to niacin treatment was significantly reduced in Gpr109a-/- mice subjected to HI. These experiments demonstrated that the Gpr109a receptor-mediated pathway contributed significantly to niacin mediated salutary effect. Further studies showed improvement in markers of cellular energetics and attenuation of inflammatory response with niacin treatment. In conclusion, we report that Gpr109a-dependent signalling is important in restoring cellular energetics and immunometabolism following hemorrhagic shock.
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Affiliation(s)
- Kumar Subramani
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta, GA 30912, United States of America
| | - Xiaogang Chu
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta, GA 30912, United States of America
| | - Marie Warren
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta, GA 30912, United States of America
| | - Mariah Lee
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta, GA 30912, United States of America
| | - Sumin Lu
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta, GA 30912, United States of America
| | - Nagendra Singh
- Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, United States of America
| | - Raghavan Raju
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta, GA 30912, United States of America; Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, United States of America.
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Iqbal F, Baker WS, Khan MI, Thukuntla S, McKinney KH, Abate N, Tuvdendorj D. Current and future therapies for addressing the effects of inflammation on HDL cholesterol metabolism. Br J Pharmacol 2017; 174:3986-4006. [PMID: 28326542 PMCID: PMC5660004 DOI: 10.1111/bph.13743] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 01/16/2017] [Accepted: 02/02/2017] [Indexed: 12/11/2022] Open
Abstract
Cardiovascular disease (CVD) is a major cause of morbidity and mortality worldwide. Inflammatory processes arising from metabolic abnormalities are known to precipitate the development of CVD. Several metabolic and inflammatory markers have been proposed for predicting the progression of CVD, including high density lipoprotein cholesterol (HDL-C). For ~50 years, HDL-C has been considered as the atheroprotective 'good' cholesterol because of its strong inverse association with the progression of CVD. Thus, interventions to increase the concentration of HDL-C have been successfully tested in animals; however, clinical trials were unable to confirm the cardiovascular benefits of pharmaceutical interventions aimed at increasing HDL-C levels. Based on these data, the significance of HDL-C in the prevention of CVD has been called into question. Fundamental in vitro and animal studies suggest that HDL-C functionality, rather than HDL-C concentration, is important for the CVD-preventive qualities of HDL-C. Our current review of the literature positively demonstrates the negative impact of systemic and tissue (i.e. adipose tissue) inflammation in the healthy metabolism and function of HDL-C. Our survey indicates that HDL-C may be a good marker of adipose tissue health, independently of its atheroprotective associations. We summarize the current findings on the use of anti-inflammatory drugs to either prevent HDL-C clearance or improve the function and production of HDL-C particles. It is evident that the therapeutic agents currently available may not provide the optimal strategy for altering HDL-C metabolism and function, and thus, further research is required to supplement this mechanistic approach for preventing the progression of CVD. LINKED ARTICLES This article is part of a themed section on Targeting Inflammation to Reduce Cardiovascular Disease Risk. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v174.22/issuetoc and http://onlinelibrary.wiley.com/doi/10.1111/bcp.v82.4/issuetoc.
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Affiliation(s)
- Fatima Iqbal
- Division of Endocrinology, Department of Internal MedicineUniversity of Texas Medical BranchGalvestonTXUSA
| | - Wendy S Baker
- Division of Endocrinology, Department of Internal MedicineUniversity of Texas Medical BranchGalvestonTXUSA
| | - Madiha I Khan
- Division of Endocrinology, Department of Internal MedicineUniversity of Texas Medical BranchGalvestonTXUSA
| | - Shwetha Thukuntla
- Division of Endocrinology, Department of Internal MedicineUniversity of Texas Medical BranchGalvestonTXUSA
| | - Kevin H McKinney
- Division of Endocrinology, Department of Internal MedicineUniversity of Texas Medical BranchGalvestonTXUSA
| | - Nicola Abate
- Division of Endocrinology, Department of Internal MedicineUniversity of Texas Medical BranchGalvestonTXUSA
| | - Demidmaa Tuvdendorj
- Division of Endocrinology, Department of Internal MedicineUniversity of Texas Medical BranchGalvestonTXUSA
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Salem HA, Wadie W. Effect of Niacin on Inflammation and Angiogenesis in a Murine Model of Ulcerative Colitis. Sci Rep 2017; 7:7139. [PMID: 28769047 PMCID: PMC5541000 DOI: 10.1038/s41598-017-07280-y] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 06/19/2017] [Indexed: 12/18/2022] Open
Abstract
Butyrate and niacin are produced by gut microbiota, however butyrate has received most attention for its effects on colonic health. The present study aimed at exploring the effect of niacin on experimental colitis as well as throwing some light on the ability of niacin to modulate angiogenesis which plays a crucial role of in the pathogenesis of inflammatory bowel disease. Rats were given niacin for 2 weeks. On day 8, colitis was induced by intrarectal administration of iodoacetamide. Rats were sacrificed on day 15 and colonic damage was assessed macroscopically and histologically. Colonic myeloperoxidase (MPO), tumour necrosis factor (TNF)-α, interleukin (IL)-10, vascular endothelial growth factor (VEGF), angiostatin and endostatin levels were determined. Niacin attenuated the severity of colitis as demonstrated by a decrease in weight loss, colonic wet weight and MPO activity. Iodoacetamide-induced rise in the colonic levels of TNF-α, VEGF, angiostatin and endostatin was reversed by niacin. Moreover, niacin normalized IL-10 level in colon. Mepenzolate bromide, a GPR109A receptor blocker, abolished the beneficial effects of niacin on body weight, colon wet weight as well as colonic levels of MPO and VEGF. Therefore, niacin was effective against iodoacetamide-induced colitis through ameliorating pathologic angiogenesis and inflammatory changes in a GPR109A-dependent manner.
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Affiliation(s)
- Hesham Aly Salem
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Walaa Wadie
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
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Bruckbauer A, Banerjee J, Cao Q, Cui X, Jing J, Zha L, Li F, Xue B, Shi H, Zemel MB. Leucine-nicotinic acid synergy stimulates AMPK/Sirt1 signaling and regulates lipid metabolism and lifespan in Caenorhabditis elegans, and hyperlipidemia and atherosclerosis in mice. AMERICAN JOURNAL OF CARDIOVASCULAR DISEASE 2017; 7:33-47. [PMID: 28533928 PMCID: PMC5435603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 02/26/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND/AIMS Nicotinic acid (NA), a lipid-lowering drug, serves as a source of NAD+, the cofactor for Sirt1. Leucine (Leu) stimulates the AMPK/Sirt1 axis and amplifies the effects of other AMPK/Sirt1 activating compounds. Therefore, we tested the interactive effects of leucine and low dose NA on AMPK/Sirt1 signaling and downstream effects of lipid metabolism in cell culture, C. elegans and mice. METHODS LDL-receptor knockout mice were fed an atherogenic Western diet supplemented with leucine (24 g/kg diet) and sub-therapeutic NA combinations (50 mg/kg diet and 250 mg/kg diet) or low therapeutic NA (1000 mg/kg diet) for 8 weeks to evaluate markers of hyperlipidemia and atherosclerosis. RESULTS NA-Leu increased P-AMPK and Sirt1 in adipocytes and myotubes. In C. elegans, NA-Leu increased P-AMPK and DAF-16 (FOXO), reduced lipid accumulation and increased median survival under mild oxidative stress conditions. In the mice, NA-Leu reduced total cholesterol, cholesterol esters, plasma triglycerides, atherosclerotic lesion size, lipid area, and aortic macrophage infiltration, similar to the therapeutic NA dose. CONCLUSION Leu amplifies the effects of NA on lipid metabolism, hyperlipidemia and atherosclerosis in mice, at least in part by activation of the AMPK/Sirt1 axis. This combination may be a potential therapeutic alternative for hyperlipidemia and atherosclerosis.
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Affiliation(s)
| | | | - Quiang Cao
- Center for Obesity Reversal, Georgia State UniversityAtlanta, GA, USA
| | - Xin Cui
- Center for Obesity Reversal, Georgia State UniversityAtlanta, GA, USA
| | - Jia Jing
- Center for Obesity Reversal, Georgia State UniversityAtlanta, GA, USA
| | - Lin Zha
- Center for Obesity Reversal, Georgia State UniversityAtlanta, GA, USA
| | - Fenfen Li
- Center for Obesity Reversal, Georgia State UniversityAtlanta, GA, USA
| | - Bingzhong Xue
- Center for Obesity Reversal, Georgia State UniversityAtlanta, GA, USA
| | - Hang Shi
- Center for Obesity Reversal, Georgia State UniversityAtlanta, GA, USA
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Wang Y, Meng X, Yan H. Niaspan inhibits diabetic retinopathy‑induced vascular inflammation by downregulating the tumor necrosis factor‑α pathway. Mol Med Rep 2017; 15:1263-1271. [PMID: 28138697 PMCID: PMC5367335 DOI: 10.3892/mmr.2017.6146] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 11/22/2016] [Indexed: 12/22/2022] Open
Abstract
Diabetic retinopathy (DR) is a serious microvascular complication of diabetes and a major cause of blindness in the developing world. Early DR is characterized by vascular neuroinflammation, cell apoptosis and breakdown of the blood‑retinal barrier (BRB). However, optimal treatment options and associated mechanisms remain unclear. Niaspan, which is widely used in the prevention and treatment of hyperlipidemia‑associated diseases, has been reported to inhibit inflammation. However, the effects of Niaspan and the mechanisms underlying the anti‑inflammatory effects of Niaspan on DR have yet to be reported. The present study aimed to investigate the anti‑inflammatory effects and mechanisms of Niaspan in a rat model of DR. Rats with DR exhibited a significant increase in BRB breakdown, retinal apoptosis, and tumor necrosis factor‑α (TNF‑α) and nuclear factor‑κB (NF‑κB) expression. In addition, the expression levels of inducible nitric oxide synthase (iNOS) and intercellular cell adhesion molecule‑1 (ICAM‑1) were increased in the retinas of DR rats compared with in the normal control group. In conclusion, treatment with Niaspan significantly improved clinical and histopathological outcomes; decreased the expression levels of TNF‑α, NF‑κB, iNOS and ICAM‑1; and decreased apoptosis and BRB breakdown, as compared with in the retinas of DR rats. The present study is the first, to the best of our knowledge, to demonstrate that Niaspan treatment ameliorates DR by inhibiting inflammation, and also suggests that the TNF‑α pathway may contribute to the beneficial effects of Niaspan treatment.
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Affiliation(s)
- Yang Wang
- Department of Ophthalmology, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Xiangda Meng
- Department of Ophthalmology, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Hua Yan
- Department of Ophthalmology, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
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Zeman M, Vecka M, Perlík F, Staňková B, Hromádka R, Tvrzická E, Širc J, Hrib J, Žák A. Pleiotropic effects of niacin: Current possibilities for its clinical use. ACTA PHARMACEUTICA 2016; 66:449-469. [PMID: 27749252 DOI: 10.1515/acph-2016-0043] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/02/2016] [Indexed: 12/28/2022]
Abstract
Niacin was the first hypolipidemic drug to significantly reduce both major cardiovascular events and mortality in patients with cardiovascular disease. Niacin favorably influences all lipoprotein classes, including lipoprotein[a],and belongs to the most potent hypolipidemic drugs for increasing HDL-C. Moreover, niacin causes favorable changes to the qualitative composition of lipoprotein HDL. In addition to its pronounced hypolipidemic action, niacin exerts many other, non-hypolipidemic effects (e.g., antioxidative, anti-inflammatory, antithrombotic), which favorably influence the development and progression of atherosclerosis. These effects are dependent on activation of the specific receptor HCA2. Recent results published by the two large clinical studies, AIM-HIGH and HPS2-THRIVE, have led to the impugnation of niacin's role in future clinical practice. However, due to several methodological flaws in the AIM-HIGH and HPS2-THRIVE studies, the pleiotropic effects of niacin now deserve thorough evaluation. This review summarizes the present and possible future use of niacin in clinical practice in light of its newly recognized pleiotropic effects.
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Affiliation(s)
- Miroslav Zeman
- 4th Department of Medicine, 1st Faculty of Medicine, Charles University in Prague, Prague, Czechia
| | - Marek Vecka
- 4th Department of Medicine, 1st Faculty of Medicine, Charles University in Prague, Prague, Czechia
| | - František Perlík
- Institute of Pharmacology, 1st Faculty of MedicineCharles University in Prague, Prague, Czechia
| | - Barbora Staňková
- 4th Department of Medicine, 1st Faculty of Medicine, Charles University in Prague, Prague, Czechia
| | - Robert Hromádka
- Research and Development Center, C2P s.r.o., Chlumec/n Cidlinou, Czechia
| | - Eva Tvrzická
- 4th Department of Medicine, 1st Faculty of Medicine, Charles University in PraguePrague, Czechia
| | - Jakub Širc
- Institute of Macromolecular, Chemistry, Academy of Sciences of the Czech Republic Prague, Czechia
| | - Jakub Hrib
- Institute of Macromolecular, Chemistry, Academy of Sciences of the Czech Republic Prague, Czechia
| | - Aleš Žák
- 4th Department of Medicine, 1st Faculty of Medicine, Charles University in Prague, Prague, Czechia
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Activation of the niacin receptor HCA2 reduces demyelination and neurofilament loss, and promotes functional recovery after spinal cord injury in mice. Eur J Pharmacol 2016; 791:124-136. [DOI: 10.1016/j.ejphar.2016.08.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 08/23/2016] [Accepted: 08/24/2016] [Indexed: 11/17/2022]
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Wang N, Guo DY, Tian X, Lin HP, Li YP, Chen SJ, Fu YC, Xu WC, Wei CJ. Niacin receptor GPR109A inhibits insulin secretion and is down-regulated in type 2 diabetic islet beta-cells. Gen Comp Endocrinol 2016; 237:98-108. [PMID: 27570060 DOI: 10.1016/j.ygcen.2016.08.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 07/18/2016] [Accepted: 08/24/2016] [Indexed: 02/05/2023]
Abstract
OBJECTIVES We previously found niacin receptor GPR109A was expressed in murine islet beta-cells, and signaling through GPR109A inhibited glucose stimulated insulin secretion (GSIS). However, the expression of GPR109A in human islets and its functional relevance is still not known. METHODS The expression of GPR109A was examined by antibody staining and in situ hybridization on pancreatic paraffin sections. GPR109A was cloned and expressed in INS-1 islet beta-cells. Intracellular cAMP and GSIS were determined using enzyme-linked immunosorbent assay (ELISA). RESULTS The expression of GPR109A was confirmed in murine islet beta-cells and further detected in human counterparts by using commercially available polyclonal antibodies. In situ hybridization study detected the transcripts of GPR109A, but not that of closely related GPR109B. Furthermore, GPR109A was significantly reduced in islets from diabetic individuals and animal model of db/db mice as compared to their respective controls. Further, GPR109A levels in insulinoma were also reduced dramatically as compared to islets found in corresponding non-tumor normal tissues. Quantitative RT-PCR analysis demonstrated that GPR109A transcripts were severely down-regulated in rodent insulinoma cell lines as compared to that of freshly isolated islets from mice. Finally, human and murine GPR109A expression cassettes were transfected into INS-1 cells, which resulted in reduced accumulation of cAMP and insulin secretion after incubation with niacin. The effect could be completely abrogated by pretreatment with pertussis toxin. CONCLUSIONS These results demonstrate that GPR109A is functionally expressed in both human and murine islet beta-cells. However, the role of GPR109A in the prevention of diabetes or insulinoma needs further study.
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Affiliation(s)
- Na Wang
- Multidisciplinary Research Center, Shantou University, Shantou 515063, Guangdong, China
| | - De-Yu Guo
- Department of Pathology, Xinan Hospital of Chongqing, Chongqing 400038, China
| | - Xiong Tian
- Multidisciplinary Research Center, Shantou University, Shantou 515063, Guangdong, China
| | - Hao-Peng Lin
- Multidisciplinary Research Center, Shantou University, Shantou 515063, Guangdong, China
| | - Yun-Pan Li
- Multidisciplinary Research Center, Shantou University, Shantou 515063, Guangdong, China
| | - Shao-Jun Chen
- Multidisciplinary Research Center, Shantou University, Shantou 515063, Guangdong, China
| | - Yu-Cai Fu
- Laboratory of Cell Senescence, Shantou University Medical College, Shantou, Guangdong 515041, China
| | - Wen-Can Xu
- Department of Endocrinology, The First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong 515041, China.
| | - Chi-Ju Wei
- Multidisciplinary Research Center, Shantou University, Shantou 515063, Guangdong, China.
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Therapeutic Effects of Chinese Medicine Herb Pair, Huzhang and Guizhi, on Monosodium Urate Crystal-Induced Gouty Arthritis in Rats Revealed by Anti-Inflammatory Assessments and NMR-Based Metabonomics. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2016; 2016:9398435. [PMID: 26989428 PMCID: PMC4771918 DOI: 10.1155/2016/9398435] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Accepted: 01/20/2016] [Indexed: 11/18/2022]
Abstract
The present study was undertaken to evaluate the therapeutic effects of Huzhang-Guizhi herb pair (HG), firstly included in Hu-Zhang Power documented in Taiping Shenghui Fang, on monosodium urate (MSU) crystals-induced gouty arthritis in rats. We found that pretreatment with HG in rats with gouty arthritis could significantly attenuate the ankle joint swelling, and this beneficial antigout effect might be mediated, at least in part, by inhibiting tumor necrosis factor-alpha (TNF-α) and interleukin-1 beta (IL-1β) production in synovial fluid as well as nuclear transcription factor-κB p65 (NF-κB p65) protein expression in synovial tissue. Moreover, metabonomic analysis demonstrated that 5 and 6 potential biomarkers associated with gouty arthritis in plasma and urine, respectively, which were mainly involved in energy metabolism, amino acid metabolism, and gut microbe metabolism, were identified. HG could reverse the pathological process of MSU-induced gouty arthritis through regulating the disturbed metabolic pathways. These results provided important mechanistic insights into the protective effects of HG against MSU-induced gouty arthritis in rats.
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A Therapeutic Insight of Niacin and Coenzyme Q10 Against Diabetic Encephalopathy in Rats. Mol Neurobiol 2016; 54:1601-1611. [DOI: 10.1007/s12035-016-9765-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Accepted: 02/01/2016] [Indexed: 11/25/2022]
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Su G, Sun G, Liu H, Shu L, Zhang J, Guo L, Huang C, Xu J. Niacin Suppresses Progression of Atherosclerosis by Inhibiting Vascular Inflammation and Apoptosis of Vascular Smooth Muscle Cells. Med Sci Monit 2015; 21:4081-9. [PMID: 26712802 PMCID: PMC4699630 DOI: 10.12659/msm.895547] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Background Niacin is a broad-spectrum lipid-regulating drug used for the clinical therapy of atherosclerosis; however, the mechanisms by which niacin ameliorates atherosclerosis are not clear. Material/Methods The effect of niacin on atherosclerosis was assessed by detection of atherosclerotic lesion area. Adhesion molecules in arterial endothelial cells were determined by using qRT-PCR and Western blot analysis. The levels of serum inflammatory cytokines in ApoE−/− mice were detected by using ELISA. We detected the expression levels of phosphorylated nuclear factors-κB (NF-κB) p65 in aortic endothelial cells of mice using Western blot analysis. Furthermore, we investigated the anti-inflammation effect and endothelium-protecting function of niacin and their regulatory mechanisms in vitro. Results Niacin inhibited the progress of atherosclerosis and decreased the levels of serum inflammatory cytokines and adhesion molecules in ApoE−/− mice. Niacin suppressed the activity of NF-κB and apoptosis of vascular smooth muscle cells (VSMCs). Furthermore, niacin induced phosphorylated focal adhesion kinase (FAK) and FAK inhibitor PF-573228 reduced the level of Bcl-2 and elevated the level of cleaved caspase-3 in VSMCs. Conclusions Niacin inhibits vascular inflammation and apoptosis of VSMCs via inhibiting the NF-κB signaling and the FAK signaling pathway, respectively, thus protecting ApoE−/− mice against atherosclerosis.
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Affiliation(s)
- Gang Su
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (mainland)
| | - Guangli Sun
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (mainland)
| | - Hai Liu
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (mainland)
| | - Liliang Shu
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (mainland)
| | - Jingchao Zhang
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (mainland)
| | - Longhui Guo
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (mainland)
| | - Chen Huang
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (mainland)
| | - Jing Xu
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (mainland)
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Li Y, Yang G, Yang X, He Y, Wang W, Zhang J, Li T, Zhang W, Lin R. Nicotinic acid inhibits vascular inflammation via the SIRT1-dependent signaling pathway. J Nutr Biochem 2015; 26:1338-47. [DOI: 10.1016/j.jnutbio.2015.07.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 06/17/2015] [Accepted: 07/06/2015] [Indexed: 12/18/2022]
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Effects of RuPeng15 Powder (RPP15) on Monosodium Urate Crystal-Induced Gouty Arthritis in Rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015. [PMID: 26221174 PMCID: PMC4499391 DOI: 10.1155/2015/527019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
RuPeng15 Powder (RPP15) is a herbal multicompound remedy that originates from traditional Tibetan medicine and possesses antigout, anti-inflammatory, and antihyperuricemic properties based on the traditional conceptions. The present study was undertaken to evaluate the therapeutic effect of PRP15 in rat gouty arthritis induced by monosodium urate (MSU) crystals. In the present study, we found that treatment with RPP15 (0.4, 0.8, and 1.2 g/kg) in rats with gouty arthritis induced by MSU crystals significantly attenuated the knee swelling. Histomorphometric and immunohistochemistry analyses revealed that MSU-induced inflammatory cell infiltration and the elevated expressions of nuclear transcription factor-κB p65 (NF-κB p65) in synovial tissues were significantly inhibited, and enzyme-linked immunosorbent assay (ELISA) result showed that MSU-induced high levels of tumor necrosis factor-alpha (TNF-α), interleukin-1 beta (IL-1β), and interleukin-8 (IL-8) in synovial fluid were reduced by treatment with RPP15 (0.4, 0.8, and 1.2 g/kg). We conclude that RPP15 may be a promising candidate for the development of a new treatment for gout and its activity of antigout may be partially related to inhibiting TNF-α, IL-1β, IL-8, and NF-κB p65 expression in the synovial tissues.
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Abstract
Niacin is an important vitamin (B3) that can be used in gram doses to positively modify pathogenetically relevant lipid disorders: elevated LDL cholesterol, elevated non-HDL cholesterol, elevated triglycerides, elevated lipoprotein(a), and reduced HDL cholesterol. This review reports the latest published findings with respect to niacin's mechanisms of action on these lipids and its anti-inflammatory and anti-atherosclerotic effects. In the pre-statin era, niacin was shown to have beneficial effects on cardiovascular end-points; but in recent years, two major studies performed in patients whose LDL cholesterol levels had been optimized by a statin therapy did not demonstrate an additional significant effect on these end-points in the groups where niacin was administered. Both studies have several drawbacks that suggest that they are not representative for other patients. Thus, niacin still plays a role either as an additive to a statin or as a substitute for a statin in statin-intolerant patients. Moreover, patients with elevated triglyceride and low HDL cholesterol levels and patients with elevated lipoprotein(a) concentrations will possibly benefit from niacin, although currently the study evidence for these indications is rather poor. Niacin may be useful for compliant patients, however possible side effects (flushing, liver damage) and contraindications should be taken into consideration.
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Affiliation(s)
- Ulrich Julius
- Department of Internal Medicine III, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Germany. Fetscherstr. 74, 01307 Dresden (Germany).,Department of Internal Medicine III, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Germany. Fetscherstr. 74, 01307 Dresden (Germany)
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Yu XH, Zheng XL, Tang CK. Nuclear Factor-κB Activation as a Pathological Mechanism of Lipid Metabolism and Atherosclerosis. Adv Clin Chem 2015; 70:1-30. [PMID: 26231484 DOI: 10.1016/bs.acc.2015.03.004] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Atherosclerosis is a chronic inflammatory disease of the arterial wall with lipid-laden lesions, involving a complex interaction between multiple different cell types and cytokine networks. Inflammatory responses mark all stages of atherogenesis: from lipid accumulation in the intima to plaque formation and eventual rupture. One of the most important regulators of inflammation is the transcription factor nuclear factor-κB (NF-κB), which is activated through the canonical and noncanonical pathways in response to various stimuli. NF-κB has long been regarded as a proatherogenic factor, because it is implicated in multiple pathological processes during atherogenesis, including foam cell formation, vascular inflammation, proliferation of vascular smooth muscle cells, arterial calcification, and plaque progression. In contrast, inhibition of NF-κB signaling has been shown to protect against atherosclerosis. This chapter aims to discuss recent progress on the roles of NF-κB in lipid metabolism and atherosclerosis and also to highlight its potential therapeutic benefits.
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Affiliation(s)
- Xiao-Hua Yu
- Key Laboratory for Atherosclerology of Hunan Province, Molecular Target New Drug Discovery and Cooperative Innovation Center of Hunan Province, Life Science Research Center, University of South China, Hengyang, PR China
| | - Xi-Long Zheng
- Department of Biochemistry and Molecular Biology, The Libin Cardiovascular Institute of Alberta, Cumming School of Medicine, The University of Calgary, Health Sciences Center, Calgary, Alberta, Canada
| | - Chao-Ke Tang
- Key Laboratory for Atherosclerology of Hunan Province, Molecular Target New Drug Discovery and Cooperative Innovation Center of Hunan Province, Life Science Research Center, University of South China, Hengyang, PR China.
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