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Białecka M, Dziedziejko V, Safranow K, Krzystolik A, Marcinowska Z, Chlubek D, Rać M. Could Tumor Necrosis Factor Serve as a Marker for Cardiovascular Risk Factors and Left Ventricular Hypertrophy in Patients with Early-Onset Coronary Artery Disease? Diagnostics (Basel) 2024; 14:449. [PMID: 38396488 PMCID: PMC10887573 DOI: 10.3390/diagnostics14040449] [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: 12/29/2023] [Revised: 02/08/2024] [Accepted: 02/16/2024] [Indexed: 02/25/2024] Open
Abstract
Introduction: Tumor necrosis factor (TNF), a pro-inflammatory cytokine, can be produced by cardiomyocytes, leading to metabolic disorders in the myocardium. The objective of this study was to assess the relationship between plasma levels of the TNF cytokine and the presence of known biochemical and clinical risk factors for cardiovascular disease, along with the parameters of cardiac morphology in patients diagnosed with coronary artery disease (CAD) at a young age. Materials and Methods: The study group included 75 men aged up to 50 years and 25 women aged up to 55 years. The plasma TNF concentration was measured by use of the ELISA assay. Echocardiography and electrocardiographic examinations were performed in all patients. Results: We observed positive correlations for TNF with the BMI ratio, weight, waist and hip circumference. We also found negative correlations for TNF with HDL levels and ApoA concentrations, and positive correlations with the ApoB/ApoA1 ratio, Apo B, IL6, LDL and TG concentrations. These results suggest an association between higher plasma TNF concentrations and components of metabolic syndrome, including dyslipidemia. TNF may be a potential risk factor for impaired diastolic function. Conclusions: While TNF may be useful for diagnosing certain risks in CAD patients, the TNF measurement cannot be used as a surrogate test for echocardiography.
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Affiliation(s)
- Marta Białecka
- Department of Internal Diseases and Hematology, Military Medical National Research Institute, Szaserów 128, 04-349 Warszawa, Poland;
| | - Violetta Dziedziejko
- Department of Biochemistry, Pomeranian Medical University, Powstańców Wielkopolskich 72, 70-111 Szczecin, Poland; (V.D.); (K.S.); (Z.M.); (D.C.)
| | - Krzysztof Safranow
- Department of Biochemistry, Pomeranian Medical University, Powstańców Wielkopolskich 72, 70-111 Szczecin, Poland; (V.D.); (K.S.); (Z.M.); (D.C.)
| | - Andrzej Krzystolik
- Department of Cardiology, County Hospital in Szczecin, Arkońska 4, 71-455 Szczecin, Poland;
| | - Zuzanna Marcinowska
- Department of Biochemistry, Pomeranian Medical University, Powstańców Wielkopolskich 72, 70-111 Szczecin, Poland; (V.D.); (K.S.); (Z.M.); (D.C.)
| | - Dariusz Chlubek
- Department of Biochemistry, Pomeranian Medical University, Powstańców Wielkopolskich 72, 70-111 Szczecin, Poland; (V.D.); (K.S.); (Z.M.); (D.C.)
| | - Monika Rać
- Department of Biochemistry, Pomeranian Medical University, Powstańców Wielkopolskich 72, 70-111 Szczecin, Poland; (V.D.); (K.S.); (Z.M.); (D.C.)
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Hatipoglu D, Senturk G, Aydin SS, Kirar N, Top S, Demircioglu İ. Rye-grass-derived probiotics alleviate heat stress effects on broiler growth, health, and gut microbiota. J Therm Biol 2024; 119:103771. [PMID: 38134538 DOI: 10.1016/j.jtherbio.2023.103771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 11/24/2023] [Accepted: 11/28/2023] [Indexed: 12/24/2023]
Abstract
The primary aim of this study was to assess the impact of liquid (S-LAB) and lyophilized (L-LAB) probiotics sourced from Rye-Grass Lactic Acid Bacteria on broilers experiencing heat stress. The study involved 240 broiler chicks divided into six groups. These groups included a negative control (Control) with broilers raised at a normal temperature (24 °C) on a basal diet, and positive control groups (S-LAB and L-LAB) with broilers under normal temperature receiving a lactic acid bacteria supplement (0.5 mL/L) from rye-grass in their drinking water. The heat stress group (HS) comprised broilers exposed to cyclic heat stress (5-7 h per day at 34-36 °C) on a basal diet, while the heat stress and probiotic groups (S-LAB/HS and L-LAB/HS) consisted of broilers under heat stress supplemented with the rye-grass-derived lactic acid bacteria. Results indicated that heat stress without supplementation (HS) led to reduced body weight gain, T3 levels, citrulline, and growth hormone levels, along with an increased feed conversion ratio, serum corticosterone, HSP70, ALT, AST, and leptin levels. Heat stress also negatively impacted cecal microbiota, decreasing lactic acid bacteria (LABC) while increasing E. coli and coliform bacteria (CBC) counts. Probiotic supplements (S-LAB/HS and L-LAB/HS) mitigated these effects by enhancing broilers' resilience to heat stress. In conclusion, rye grass-derived S-LAB and L-LAB probiotics can effectively support broiler chickens under heat stress, promoting growth, liver function, hormonal balance, gut health, and cecal microbiome ecology. These benefits are likely mediated through improved gut health.
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Affiliation(s)
- Durmus Hatipoglu
- Selcuk University, Faculty of Veterinary Medicine, Department of Physiology, 42130, Konya, Turkey.
| | - Goktug Senturk
- Aksaray University, Faculty of Veterinary Medicine, Department of Physiology, 68100, Aksaray, Turkey
| | - Sadik Serkan Aydin
- Harran University, Department of Animal Nutrition and Nutritional Disease, Faculty of Veterinary Medicine, 63200, Şanlıurfa, Turkey
| | - Nurcan Kirar
- Harran University, Department of Animal Nutrition and Nutritional Disease, Faculty of Veterinary Medicine, 63200, Şanlıurfa, Turkey
| | - Sermin Top
- Harran University, Department of Animal Nutrition and Nutritional Disease, Faculty of Veterinary Medicine, 63200, Şanlıurfa, Turkey
| | - İsmail Demircioglu
- Harran University, Faculty of Veterinary Medicine, Department of Anatomy, 63200, Sanliurfa, Turkey
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3
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Ji A, Trumbauer AC, Noffsinger VP, Meredith LW, Dong B, Wang Q, Guo L, Li X, De Beer FC, Webb NR, Tannock LR, Starr ME, Waters CM, Shridas P. Deficiency of Acute-Phase Serum Amyloid A Exacerbates Sepsis-Induced Mortality and Lung Injury in Mice. Int J Mol Sci 2023; 24:17501. [PMID: 38139330 PMCID: PMC10744229 DOI: 10.3390/ijms242417501] [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: 11/10/2023] [Revised: 12/11/2023] [Accepted: 12/13/2023] [Indexed: 12/24/2023] Open
Abstract
Serum amyloid A (SAA) is a family of proteins, the plasma levels of which may increase >1000-fold in acute inflammatory states. We investigated the role of SAA in sepsis using mice deficient in all three acute-phase SAA isoforms (SAA-TKO). SAA deficiency significantly increased mortality rates in the three experimental sepsis mouse models: cecal ligation and puncture (CLP), cecal slurry (CS) injection, and lipopolysaccharide (LPS) treatments. SAA-TKO mice had exacerbated lung pathology compared to wild-type (WT) mice after CLP. A bulk RNA sequencing performed on lung tissues excised 24 h after CLP indicated significant enrichment in the expression of genes associated with chemokine production, chemokine and cytokine-mediated signaling, neutrophil chemotaxis, and neutrophil migration in SAA-TKO compared to WT mice. Consistently, myeloperoxidase activity and neutrophil counts were significantly increased in the lungs of septic SAA-TKO mice compared to WT mice. The in vitro treatment of HL-60, neutrophil-like cells, with SAA or SAA bound to a high-density lipoprotein (SAA-HDL), significantly decreased cellular transmigration through laminin-coated membranes compared to untreated cells. Thus, SAA potentially prevents neutrophil transmigration into injured lungs, thus reducing exacerbated tissue injury and mortality. In conclusion, we demonstrate for the first time that endogenous SAA plays a protective role in sepsis, including ameliorating lung injury.
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Affiliation(s)
- Ailing Ji
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY 40536, USA; (A.J.); (A.C.T.); (V.P.N.); (L.W.M.); (Q.W.); (L.G.); (X.L.); (N.R.W.); (L.R.T.)
| | - Andrea C. Trumbauer
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY 40536, USA; (A.J.); (A.C.T.); (V.P.N.); (L.W.M.); (Q.W.); (L.G.); (X.L.); (N.R.W.); (L.R.T.)
| | - Victoria P. Noffsinger
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY 40536, USA; (A.J.); (A.C.T.); (V.P.N.); (L.W.M.); (Q.W.); (L.G.); (X.L.); (N.R.W.); (L.R.T.)
| | - Luke W. Meredith
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY 40536, USA; (A.J.); (A.C.T.); (V.P.N.); (L.W.M.); (Q.W.); (L.G.); (X.L.); (N.R.W.); (L.R.T.)
| | - Brittany Dong
- Department of Physiology, University of Kentucky, Lexington, KY 40536, USA; (B.D.); (C.M.W.)
| | - Qian Wang
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY 40536, USA; (A.J.); (A.C.T.); (V.P.N.); (L.W.M.); (Q.W.); (L.G.); (X.L.); (N.R.W.); (L.R.T.)
| | - Ling Guo
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY 40536, USA; (A.J.); (A.C.T.); (V.P.N.); (L.W.M.); (Q.W.); (L.G.); (X.L.); (N.R.W.); (L.R.T.)
| | - Xiangan Li
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY 40536, USA; (A.J.); (A.C.T.); (V.P.N.); (L.W.M.); (Q.W.); (L.G.); (X.L.); (N.R.W.); (L.R.T.)
- Department of Physiology, University of Kentucky, Lexington, KY 40536, USA; (B.D.); (C.M.W.)
- Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY 40536, USA;
| | - Frederick C. De Beer
- Department of Internal Medicine, University of Kentucky, Lexington, KY 40536, USA;
| | - Nancy R. Webb
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY 40536, USA; (A.J.); (A.C.T.); (V.P.N.); (L.W.M.); (Q.W.); (L.G.); (X.L.); (N.R.W.); (L.R.T.)
- Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY 40536, USA;
| | - Lisa R. Tannock
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY 40536, USA; (A.J.); (A.C.T.); (V.P.N.); (L.W.M.); (Q.W.); (L.G.); (X.L.); (N.R.W.); (L.R.T.)
- Department of Internal Medicine, University of Kentucky, Lexington, KY 40536, USA;
| | - Marlene E. Starr
- Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY 40536, USA;
- Department of Surgery, College of Medicine, University of Kentucky, Lexington, KY 40536, USA
| | - Christopher M. Waters
- Department of Physiology, University of Kentucky, Lexington, KY 40536, USA; (B.D.); (C.M.W.)
| | - Preetha Shridas
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY 40536, USA; (A.J.); (A.C.T.); (V.P.N.); (L.W.M.); (Q.W.); (L.G.); (X.L.); (N.R.W.); (L.R.T.)
- Department of Internal Medicine, University of Kentucky, Lexington, KY 40536, USA;
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4
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Ji A, Trumbauer AC, Noffsinger VP, de Beer FC, Webb NR, Tannock LR, Shridas P. Serum amyloid A augments the atherogenic effects of cholesteryl ester transfer protein. J Lipid Res 2023; 64:100365. [PMID: 37004910 PMCID: PMC10165456 DOI: 10.1016/j.jlr.2023.100365] [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: 02/10/2023] [Revised: 03/24/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023] Open
Abstract
Serum amyloid A (SAA) is predictive of CVD in humans and causes atherosclerosis in mice. SAA has many proatherogenic effects in vitro. However, HDL, the major carrier of SAA in the circulation, masks these effects. The remodeling of HDL by cholesteryl ester transfer protein (CETP) liberates SAA restoring its proinflammatory activity. Here, we investigated whether deficiency of SAA suppresses the previously described proatherogenic effect of CETP. ApoE-/- mice and apoE-/- mice deficient in the three acute-phase isoforms of SAA (SAA1.1, SAA2.1, and SAA3; "apoE-/- SAA-TKO") with and without adeno-associated virus-mediated expression of CETP were studied. There was no effect of CETP expression or SAA genotype on plasma lipids or inflammatory markers. Atherosclerotic lesion area in the aortic arch of apoE-/- mice was 5.9 ± 1.2%; CETP expression significantly increased atherosclerosis in apoE-/- mice (13.1 ± 2.2%). However, atherosclerotic lesion area in the aortic arch of apoE-/- SAA-TKO mice (5.1 ± 1.1%) was not significantly increased by CETP expression (6.2 ± 0.9%). The increased atherosclerosis in apoE-/- mice expressing CETP was associated with markedly increased SAA immunostaining in aortic root sections. Thus, SAA augments the atherogenic effects of CETP, which suggests that inhibiting CETP may be of particular benefit in patients with high SAA.
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Affiliation(s)
- Ailing Ji
- Barnstable Brown Diabetes Center, University of Kentucky, Lexington, KY, USA; Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY, USA
| | - Andrea C Trumbauer
- Barnstable Brown Diabetes Center, University of Kentucky, Lexington, KY, USA; Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY, USA
| | - Victoria P Noffsinger
- Barnstable Brown Diabetes Center, University of Kentucky, Lexington, KY, USA; Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY, USA
| | - Frederick C de Beer
- Barnstable Brown Diabetes Center, University of Kentucky, Lexington, KY, USA; Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY, USA; Department of Internal Medicine, University of Kentucky, Lexington, KY, USA
| | - Nancy R Webb
- Barnstable Brown Diabetes Center, University of Kentucky, Lexington, KY, USA; Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY, USA; Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY, USA
| | - Lisa R Tannock
- Barnstable Brown Diabetes Center, University of Kentucky, Lexington, KY, USA; Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY, USA; Department of Internal Medicine, University of Kentucky, Lexington, KY, USA; Lexington Veterans Affairs Medical Center, Lexington, KY, USA
| | - Preetha Shridas
- Barnstable Brown Diabetes Center, University of Kentucky, Lexington, KY, USA; Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY, USA; Department of Internal Medicine, University of Kentucky, Lexington, KY, USA.
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5
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Serum Amyloid A is not obligatory for high-fat, high-sucrose, cholesterol-fed diet-induced obesity and its metabolic and inflammatory complications. PLoS One 2022; 17:e0266688. [PMID: 35436297 PMCID: PMC9015120 DOI: 10.1371/journal.pone.0266688] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 03/24/2022] [Indexed: 12/26/2022] Open
Abstract
Several studies in the past have reported positive correlations between circulating Serum amyloid A (SAA) levels and obesity. However, based on limited number of studies involving appropriate mouse models, the role of SAA in the development of obesity and obesity-related metabolic consequences has not been established. Accordingly, herein, we have examined the role of SAA in the development of obesity and its associated metabolic complications in vivo using mice deficient for all three inducible forms of SAA: SAA1.1, SAA2.1 and SAA3 (TKO). Male and female mice were rendered obese by feeding a high fat, high sucrose diet with added cholesterol (HFHSC) and control mice were fed rodent chow diet. Here, we show that the deletion of SAA does not affect diet-induced obesity, hepatic lipid metabolism or adipose tissue inflammation. However, there was a modest effect on glucose metabolism. The results of this study confirm previous findings that SAA levels are elevated in adipose tissues as well as in the circulation in diet-induced obese mice. However, the three acute phase SAAs do not play a causative role in the development of obesity or obesity-associated adipose tissue inflammation and dyslipidemia.
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Nurmi K, Niemi K, Kareinen I, Silventoinen K, Lorey MB, Chen Y, Kouri VP, Parantainen J, Juutilainen T, Öörni K, Kovanen PT, Nordström D, Matikainen S, Eklund KK. Native and oxidised lipoproteins negatively regulate the serum amyloid A-induced NLRP3 inflammasome activation in human macrophages. Clin Transl Immunology 2021; 10:e1323. [PMID: 34377468 PMCID: PMC8329955 DOI: 10.1002/cti2.1323] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 06/19/2021] [Accepted: 07/16/2021] [Indexed: 01/17/2023] Open
Abstract
Objectives The NLRP3 inflammasome plays a key role in arterial wall inflammation. In this study, we elucidated the role of serum lipoproteins in the regulation of NLRP3 inflammasome activation by serum amyloid A (SAA) and other inflammasome activators. Methods The effect of lipoproteins on the NLRP3 inflammasome activation was studied in primary human macrophages and THP‐1 macrophages. The effect of oxidised low‐density lipoprotein (LDL) was examined in an in vivo mouse model of SAA‐induced peritoneal inflammation. Results Native and oxidised high‐density lipoproteins (HDL3) and LDLs inhibited the interaction of SAA with TLR4. HDL3 and LDL inhibited the secretion of interleukin (IL)‐1β and tumor necrosis factor by reducing their transcription. Oxidised forms of these lipoproteins reduced the secretion of mature IL‐1β also by inhibiting the activation of NLRP3 inflammasome induced by SAA, ATP, nigericin and monosodium urate crystals. Specifically, oxidised LDL was found to inhibit the inflammasome complex formation. No cellular uptake of lipoproteins was required, nor intact lipoprotein particles for the inhibitory effect, as the lipid fraction of oxidised LDL was sufficient. The inhibition of NLRP3 inflammasome activation by oxidised LDL was partially dependent on autophagy. Finally, oxidised LDL inhibited the SAA‐induced peritoneal inflammation and IL‐1β secretion in vivo. Conclusions These findings reveal that both HDL3 and LDL inhibit the proinflammatory activity of SAA and this inhibition is further enhanced by lipoprotein oxidation. Thus, lipoproteins possess major anti‐inflammatory functions that hinder the NLRP3 inflammasome‐activating signals, particularly those exerted by SAA, which has important implications in the pathogenesis of cardiovascular diseases.
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Affiliation(s)
- Katariina Nurmi
- Helsinki Rheumatic Diseases and Inflammation Research Group Translational Immunology Research Program University of Helsinki Helsinki University Clinicum Helsinki Finland
| | | | | | - Kristiina Silventoinen
- Helsinki Rheumatic Diseases and Inflammation Research Group Translational Immunology Research Program University of Helsinki Helsinki University Clinicum Helsinki Finland
| | - Martina B Lorey
- Helsinki Rheumatic Diseases and Inflammation Research Group Translational Immunology Research Program University of Helsinki Helsinki University Clinicum Helsinki Finland.,Wihuri Research Institute Helsinki Finland
| | - Yan Chen
- Helsinki Rheumatic Diseases and Inflammation Research Group Translational Immunology Research Program University of Helsinki Helsinki University Clinicum Helsinki Finland
| | - Vesa-Petteri Kouri
- Helsinki Rheumatic Diseases and Inflammation Research Group Translational Immunology Research Program University of Helsinki Helsinki University Clinicum Helsinki Finland
| | - Jukka Parantainen
- Helsinki Rheumatic Diseases and Inflammation Research Group Translational Immunology Research Program University of Helsinki Helsinki University Clinicum Helsinki Finland
| | - Timo Juutilainen
- Division of Orthopedics Department of Surgery Helsinki University Central Hospital Vantaa Finland
| | | | | | - Dan Nordström
- Helsinki Rheumatic Diseases and Inflammation Research Group Translational Immunology Research Program University of Helsinki Helsinki University Clinicum Helsinki Finland.,Internal Medicine and Rehabilitation University of Helsinki and Helsinki University Hospital Helsinki Finland
| | - Sampsa Matikainen
- Helsinki Rheumatic Diseases and Inflammation Research Group Translational Immunology Research Program University of Helsinki Helsinki University Clinicum Helsinki Finland
| | - Kari K Eklund
- Helsinki Rheumatic Diseases and Inflammation Research Group Translational Immunology Research Program University of Helsinki Helsinki University Clinicum Helsinki Finland.,Division of Rheumatology Department of Medicine Helsinki University Hospital Helsinki Finland.,Orton Orthopaedic Hospital Helsinki Finland
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Abstract
PURPOSE OF REVIEW Serum amyloid A (SAA) is a highly sensitive acute phase reactant that has been linked to a number of chronic inflammatory diseases. During a systemic inflammatory response, liver-derived SAA is primarily found on high-density lipoprotein (HDL). The purpose of this review is to discuss recent literature addressing the pathophysiological functions of SAA and the significance of its association with HDL. RECENT FINDINGS Studies in gene-targeted mice establish that SAA contributes to atherosclerosis and some metastatic cancers. Accumulating evidence indicates that the lipidation state of SAA profoundly affects its bioactivities, with lipid-poor, but not HDL-associated, SAA capable of inducing inflammatory responses in vitro and in vivo. Factors that modulate the equilibrium between lipid-free and HDL-associated SAA have been identified. HDL may serve to limit SAA's bioactivities in vivo. Understanding the factors leading to the release of systemic SAA from HDL may provide insights into chronic disease mechanisms.
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Affiliation(s)
- Nancy R Webb
- Department of Pharmacology and Nutritional Sciences, Saha Cardiovascular Research Center, and Barnstable Brown Diabetes Center, University of Kentucky, 553 Wethington Building, 900 South Limestone, Lexington, KY, 40536-0200, USA.
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8
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Soppert J, Lehrke M, Marx N, Jankowski J, Noels H. Lipoproteins and lipids in cardiovascular disease: from mechanistic insights to therapeutic targeting. Adv Drug Deliv Rev 2020; 159:4-33. [PMID: 32730849 DOI: 10.1016/j.addr.2020.07.019] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 07/20/2020] [Accepted: 07/22/2020] [Indexed: 12/12/2022]
Abstract
With cardiovascular disease being the leading cause of morbidity and mortality worldwide, effective and cost-efficient therapies to reduce cardiovascular risk are highly needed. Lipids and lipoprotein particles crucially contribute to atherosclerosis as underlying pathology of cardiovascular disease and influence inflammatory processes as well as function of leukocytes, vascular and cardiac cells, thereby impacting on vessels and heart. Statins form the first-line therapy with the aim to block cholesterol synthesis, but additional lipid-lowering drugs are sometimes needed to achieve low-density lipoprotein (LDL) cholesterol target values. Furthermore, beyond LDL cholesterol, also other lipid mediators contribute to cardiovascular risk. This review comprehensively discusses low- and high-density lipoprotein cholesterol, lipoprotein (a), triglycerides as well as fatty acids and derivatives in the context of cardiovascular disease, providing mechanistic insights into their role in pathological processes impacting on cardiovascular disease. Also, an overview of applied as well as emerging therapeutic strategies to reduce lipid-induced cardiovascular burden is provided.
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Affiliation(s)
- Josefin Soppert
- Institute for Molecular Cardiovascular Research (IMCAR), University Hospital Aachen, Aachen, Germany
| | - Michael Lehrke
- Medical Clinic I, University Hospital Aachen, Aachen, Germany
| | - Nikolaus Marx
- Medical Clinic I, University Hospital Aachen, Aachen, Germany
| | - Joachim Jankowski
- Institute for Molecular Cardiovascular Research (IMCAR), University Hospital Aachen, Aachen, Germany; Department of Pathology, Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht University, the Netherlands
| | - Heidi Noels
- Institute for Molecular Cardiovascular Research (IMCAR), University Hospital Aachen, Aachen, Germany; Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, the Netherlands.
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9
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Abstract
PURPOSE OF REVIEW Acute phase serum amyloid A (SAA) is persistently elevated in chronic inflammatory conditions, and elevated levels predict cardiovascular risk in humans. More recently, murine studies have demonstrated that over-expression of SAA increases and deficiency/suppression of SAA attenuates atherosclerosis. Thus, beyond being a biomarker, SAA appears to play a causal role in atherogenesis. The purpose of this review is to summarize the data supporting SAA as a key player in atherosclerosis development. RECENT FINDINGS A number of pro-inflammatory and pro-atherogenic activities have been ascribed to SAA. However, the literature is conflicted, as recombinant SAA, and/or lipid-free SAA, used in many of the earlier studies, do not reflect the activity of native human or murine SAA, which exists largely lipid-associated. Recent literatures demonstrate that SAA activates the NLRP3 inflammasome, alters vascular function, affects HDL function, and increases thrombosis. Importantly, SAA activity appears to be regulated by its lipid association, and HDL may serve to sequester and limit SAA activity. SUMMARY SAA has many pro-inflammatory and pro-atherogenic activities, is clearly demonstrated to affect atherosclerosis development, and may be a candidate target for clinical trials in cardiovascular diseases.
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Affiliation(s)
- Preetha Shridas
- Department of Internal Medicine
- Saha Cardiovascular Research Center
- Barnstable Brown Diabetes Center and University of Kentucky
| | - Lisa R Tannock
- Department of Internal Medicine
- Saha Cardiovascular Research Center
- Barnstable Brown Diabetes Center and University of Kentucky
- Veterans Affairs Lexington, Lexington, Kentucky, USA
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10
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Schuchardt M, Prüfer N, Tu Y, Herrmann J, Hu XP, Chebli S, Dahlke K, Zidek W, van der Giet M, Tölle M. Dysfunctional high-density lipoprotein activates toll-like receptors via serum amyloid A in vascular smooth muscle cells. Sci Rep 2019; 9:3421. [PMID: 30833653 PMCID: PMC6399289 DOI: 10.1038/s41598-019-39846-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 02/01/2019] [Indexed: 01/12/2023] Open
Abstract
Serum amyloid A (SAA) is an uremic toxin and acute phase protein. It accumulates under inflammatory conditions associated with high cardiovascular morbidity and mortality in patients with sepsis or end-stage renal disease (ESRD). SAA is an apolipoprotein of the high-density lipoprotein (HDL). SAA accumulation turns HDL from an anti-inflammatory to a pro-inflammatory particle. SAA activates monocyte chemoattractant protein-1 (MCP-1) in vascular smooth muscle cells. However, the SAA receptor-mediated signaling pathway in vascular cells is poorly understood. Therefore, the SAA-mediated signaling pathway for MCP-1 production was investigated in this study. The SAA-induced MCP-1 production is dependent on the activation of TLR2 and TLR4 as determined by studies with specific receptor antagonists and agonists or siRNA approach. Experiments were confirmed in tissues from TLR2 knockout, TLR4 deficient and TLR2 knock-out/TLR4 deficient mice. The intracellular signaling pathway is IκBα and subsequently NFκB dependent. The MCP-1 production induced by SAA-enriched HDL and HDL isolated from septic patients with high SAA content is also TLR2 and TLR4 dependent. Taken together, the TLR2 and TLR4 receptors are functional SAA receptors mediating MCP-1 release. Furthermore, the TLR2 and TLR4 are receptors for dysfunctional HDL. These results give a further inside in SAA as uremic toxin involved in uremia-related pro-inflammatory response in the vascular wall.
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Affiliation(s)
- Mirjam Schuchardt
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of Health, Department of Nephrology, Hindenburgdamm 30, 12203, Berlin, Germany
| | - Nicole Prüfer
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of Health, Department of Nephrology, Hindenburgdamm 30, 12203, Berlin, Germany
| | - Yuexing Tu
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of Health, Department of Nephrology, Hindenburgdamm 30, 12203, Berlin, Germany.,Zhejiang Provincial People´s Hospital, Intensive Care Unit, Hangzhou, China
| | - Jaqueline Herrmann
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of Health, Department of Nephrology, Hindenburgdamm 30, 12203, Berlin, Germany
| | - Xiu-Ping Hu
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of Health, Department of Nephrology, Hindenburgdamm 30, 12203, Berlin, Germany
| | - Sarah Chebli
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of Health, Department of Nephrology, Hindenburgdamm 30, 12203, Berlin, Germany
| | - Katja Dahlke
- Deutsches Institut für Ernaehrungsforschung, Department of Gastrointestinal Microbiology, Arthur-Scheunert-Allee 114-116, 14558, Nuthethal, Germany
| | - Walter Zidek
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of Health, Department of Nephrology, Hindenburgdamm 30, 12203, Berlin, Germany
| | - Markus van der Giet
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of Health, Department of Nephrology, Hindenburgdamm 30, 12203, Berlin, Germany.
| | - Markus Tölle
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of Health, Department of Nephrology, Hindenburgdamm 30, 12203, Berlin, Germany
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11
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Vallejo A, Chami B, Dennis JM, Simone M, Ahmad G, Abdo AI, Sharma A, Shihata WA, Martin N, Chin-Dusting JPF, de Haan JB, Witting PK. NFκB Inhibition Mitigates Serum Amyloid A-Induced Pro-Atherogenic Responses in Endothelial Cells and Leukocyte Adhesion and Adverse Changes to Endothelium Function in Isolated Aorta. Int J Mol Sci 2018; 20:ijms20010105. [PMID: 30597899 PMCID: PMC6337750 DOI: 10.3390/ijms20010105] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 12/14/2018] [Accepted: 12/18/2018] [Indexed: 01/19/2023] Open
Abstract
The acute phase protein serum amyloid A (SAA) is associated with endothelial dysfunction and early-stage atherogenesis. Stimulation of vascular cells with SAA increases gene expression of pro-inflammation cytokines and tissue factor (TF). Activation of the transcription factor, nuclear factor kappa-B (NFκB), may be central to SAA-mediated endothelial cell inflammation, dysfunction and pro-thrombotic responses, while targeting NFκB with a pharmacologic inhibitor, BAY11-7082, may mitigate SAA activity. Human carotid artery endothelial cells (HCtAEC) were pre-incubated (1.5 h) with 10 μM BAY11-7082 or vehicle (control) followed by SAA (10 μg/mL; 4.5 h). Under these conditions gene expression for TF and Tumor Necrosis Factor (TNF) increased in SAA-treated HCtAEC and pre-treatment with BAY11-7082 significantly (TNF) and marginally (TF) reduced mRNA expression. Intracellular TNF and interleukin 6 (IL-6) protein also increased in HCtAEC supplemented with SAA and this expression was inhibited by BAY11-7082. Supplemented BAY11-7082 also significantly decreased SAA-mediated leukocyte adhesion to apolipoprotein E-deficient mouse aorta in exvivo vascular flow studies. In vascular function studies, isolated aortic rings pre-treated with BAY11-7082 prior to incubation with SAA showed improved endothelium-dependent vasorelaxation and increased vascular cyclic guanosine monophosphate (cGMP) content. Together these data suggest that inhibition of NFκB activation may protect endothelial function by inhibiting the pro-inflammatory and pro-thrombotic activities of SAA.
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Affiliation(s)
- Abigail Vallejo
- Discipline of Pathology, Sydney Medical School, The University of Sydney, Camperdown, NSW 2006, Australia.
| | - Belal Chami
- Discipline of Pathology, Sydney Medical School, The University of Sydney, Camperdown, NSW 2006, Australia.
| | - Joanne M Dennis
- Discipline of Pathology, Sydney Medical School, The University of Sydney, Camperdown, NSW 2006, Australia.
| | - Martin Simone
- Discipline of Pathology, Sydney Medical School, The University of Sydney, Camperdown, NSW 2006, Australia.
| | - Gulfam Ahmad
- Discipline of Pathology, Sydney Medical School, The University of Sydney, Camperdown, NSW 2006, Australia.
| | - Adrian I Abdo
- Heart Research Institute, Newton, NSW 2053, Australia.
| | - Arpeeta Sharma
- Baker Heart and Diabetes Institute, Victoria 3004, Australia.
| | - Waled A Shihata
- Baker Heart and Diabetes Institute, Victoria 3004, Australia.
- Department of Medicine, Monash University, Victoria 3500, Australia.
- Cardiovascular Disease Program, Biomedicine Discovery Institute, Monash University £Department of Pharmacology, Monash University, Victoria 3800, Australia.
| | - Nathan Martin
- Discipline of Pathology, Sydney Medical School, The University of Sydney, Camperdown, NSW 2006, Australia.
| | - Jaye P F Chin-Dusting
- Baker Heart and Diabetes Institute, Victoria 3004, Australia.
- Department of Medicine, Monash University, Victoria 3500, Australia.
- Cardiovascular Disease Program, Biomedicine Discovery Institute, Monash University £Department of Pharmacology, Monash University, Victoria 3800, Australia.
| | - Judy B de Haan
- Baker Heart and Diabetes Institute, Victoria 3004, Australia.
- Department of Immunology, Monash University, Victoria 3004, Australia.
- Department of Physiology, Anatomy & Microbiology, School of Life Sciences, La Trobe University, Bundoora, VIC 3083, Australia.
| | - Paul K Witting
- Discipline of Pathology, Sydney Medical School, The University of Sydney, Camperdown, NSW 2006, Australia.
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12
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Wilson PG, Thompson JC, Shridas P, McNamara PJ, de Beer MC, de Beer FC, Webb NR, Tannock LR. Serum Amyloid A Is an Exchangeable Apolipoprotein. Arterioscler Thromb Vasc Biol 2018; 38:1890-1900. [PMID: 29976766 PMCID: PMC6202200 DOI: 10.1161/atvbaha.118.310979] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Objective- SAA (serum amyloid A) is a family of acute-phase reactants that have proinflammatory and proatherogenic activities. SAA is more lipophilic than apoA-I (apolipoprotein A-I), and during an acute-phase response, <10% of plasma SAA is found lipid-free. In most reports, SAA is found exclusively associated with high-density lipoprotein; however, we and others have reported SAA on apoB (apolipoprotein B)-containing lipoproteins in both mice and humans. The goal of this study was to determine whether SAA is an exchangeable apolipoprotein. Approach and Results- Delipidated human SAA was incubated with SAA-free human lipoproteins; then, samples were reisolated by fast protein liquid chromatography, and SAA analyzed by ELISA and immunoblot. Both in vitro and in vivo, we show that SAA associates with any lipoprotein and does not remain in a lipid-free form. Although SAA is preferentially found on high-density lipoprotein, it can exchange between lipoproteins. In the presence of CETP (cholesterol ester transfer protein), there is greater exchange of SAA between lipoproteins. Subjects with diabetes mellitus, but not those with metabolic syndrome, showed altered SAA lipoprotein distribution postprandially. Proteoglycan-mediated lipoprotein retention is thought to be an underlying mechanism for atherosclerosis development. SAA has a proteoglycan-binding domain. Lipoproteins containing SAA had increased proteoglycan binding compared with SAA-free lipoproteins. Conclusions- Thus, SAA is an exchangeable apolipoprotein and increases apoB-containing lipoproteins' proteoglycan binding. We and others have previously reported the presence of SAA on low-density lipoprotein in individuals with obesity, diabetes mellitus, and metabolic syndrome. We propose that the presence of SAA on apoB-containing lipoproteins may contribute to cardiovascular disease development in these populations.
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Affiliation(s)
- Patricia G Wilson
- Department of Veterans Affairs, Lexington, KY
- Saha Cardiovascular Research Center, College of Medicine, University of Kentucky
- Barnstable Brown Diabetes Center, College of Medicine, University of Kentucky
| | - Joel C Thompson
- Department of Veterans Affairs, Lexington, KY
- Saha Cardiovascular Research Center, College of Medicine, University of Kentucky
- Barnstable Brown Diabetes Center, College of Medicine, University of Kentucky
| | - Preetha Shridas
- Department of Internal Medicine, College of Medicine, University of Kentucky
- Saha Cardiovascular Research Center, College of Medicine, University of Kentucky
- Barnstable Brown Diabetes Center, College of Medicine, University of Kentucky
| | - Patrick J McNamara
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky
| | - Maria C de Beer
- Department of Physiology, College of Medicine, University of Kentucky
- Saha Cardiovascular Research Center, College of Medicine, University of Kentucky
- Barnstable Brown Diabetes Center, College of Medicine, University of Kentucky
| | - Frederick C de Beer
- Department of Internal Medicine, College of Medicine, University of Kentucky
- Saha Cardiovascular Research Center, College of Medicine, University of Kentucky
- Barnstable Brown Diabetes Center, College of Medicine, University of Kentucky
| | - Nancy R Webb
- Department of Veterans Affairs, Lexington, KY
- Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky
- Saha Cardiovascular Research Center, College of Medicine, University of Kentucky
- Barnstable Brown Diabetes Center, College of Medicine, University of Kentucky
| | - Lisa R Tannock
- Department of Veterans Affairs, Lexington, KY
- Department of Internal Medicine, College of Medicine, University of Kentucky
- Saha Cardiovascular Research Center, College of Medicine, University of Kentucky
- Barnstable Brown Diabetes Center, College of Medicine, University of Kentucky
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13
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Tannock LR, De Beer MC, Ji A, Shridas P, Noffsinger VP, den Hartigh L, Chait A, De Beer FC, Webb NR. Serum amyloid A3 is a high density lipoprotein-associated acute-phase protein. J Lipid Res 2017; 59:339-347. [PMID: 29247043 DOI: 10.1194/jlr.m080887] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 11/22/2017] [Indexed: 12/20/2022] Open
Abstract
Serum amyloid A (SAA) is a family of acute-phase reactants. Plasma levels of human SAA1/SAA2 (mouse SAA1.1/2.1) can increase ≥1,000-fold during an acute-phase response. Mice, but not humans, express a third relatively understudied SAA isoform, SAA3. We investigated whether mouse SAA3 is an HDL-associated acute-phase SAA. Quantitative RT-PCR with isoform-specific primers indicated that SAA3 and SAA1.1/2.1 are induced similarly in livers (∼2,500-fold vs. ∼6,000-fold, respectively) and fat (∼400-fold vs. ∼100-fold, respectively) of lipopolysaccharide (LPS)-injected mice. In situ hybridization demonstrated that all three SAAs are produced by hepatocytes. All three SAA isoforms were detected in plasma of LPS-injected mice, although SAA3 levels were ∼20% of SAA1.1/2.1 levels. Fast protein LC analyses indicated that virtually all of SAA1.1/2.1 eluted with HDL, whereas ∼15% of SAA3 was lipid poor/free. After density gradient ultracentrifugation, isoelectric focusing demonstrated that ∼100% of plasma SAA1.1 was recovered in HDL compared with only ∼50% of SAA2.1 and ∼10% of SAA3. Thus, SAA3 appears to be more loosely associated with HDL, resulting in lipid-poor/free SAA3. We conclude that SAA3 is a major hepatic acute-phase SAA in mice that may produce systemic effects during inflammation.
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Affiliation(s)
- Lisa R Tannock
- Departments of Internal Medicine, University of Kentucky, Lexington, KY.,Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY.,Barnstable Brown Diabetes Center, University of Kentucky, Lexington, KY.,Veterans Affairs Lexington, University of Kentucky, Lexington, KY
| | - Maria C De Beer
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY.,Barnstable Brown Diabetes Center, University of Kentucky, Lexington, KY.,Departments of Physiology, University of Kentucky, Lexington, KY
| | - Ailing Ji
- Departments of Internal Medicine, University of Kentucky, Lexington, KY.,Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY
| | - Preetha Shridas
- Departments of Internal Medicine, University of Kentucky, Lexington, KY.,Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY.,Barnstable Brown Diabetes Center, University of Kentucky, Lexington, KY
| | - Victoria P Noffsinger
- Departments of Internal Medicine, University of Kentucky, Lexington, KY.,Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY
| | - Laura den Hartigh
- Department of Medicine University of Washington, Seattle, WA.,University of Washington Diabetes Institute, University of Washington, Seattle, WA
| | - Alan Chait
- Department of Medicine University of Washington, Seattle, WA.,University of Washington Diabetes Institute, University of Washington, Seattle, WA
| | - Frederick C De Beer
- Departments of Internal Medicine, University of Kentucky, Lexington, KY.,Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY.,Barnstable Brown Diabetes Center, University of Kentucky, Lexington, KY
| | - Nancy R Webb
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY .,Barnstable Brown Diabetes Center, University of Kentucky, Lexington, KY.,Veterans Affairs Lexington, University of Kentucky, Lexington, KY.,Departments of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY
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14
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de Oliveira EM, Ascar TP, Silva JC, Sandri S, Migliorini S, Fock RA, Campa A. Serum amyloid A links endotoxaemia to weight gain and insulin resistance in mice. Diabetologia 2016; 59:1760-8. [PMID: 27126803 DOI: 10.1007/s00125-016-3970-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 04/06/2016] [Indexed: 01/21/2023]
Abstract
AIMS/HYPOTHESIS Pre-adipocytes and adipocytes are responsive to the acute phase protein serum amyloid A (SAA). The combined effects triggered by SAA encompass an increase in pre-adipocyte proliferation, an induction of TNF-α and IL-6 release and a decrease in glucose uptake in mature adipocytes, strongly supporting a role for SAA in obesity and related comorbidities. This study addressed whether SAA depletion modulates weight gain and insulin resistance induced by a high-fat diet (HFD). METHODS Male Swiss Webster mice were fed an HFD for 10 weeks under an SAA-targeted antisense oligonucleotide (ASOSAA) treatment in order to evaluate the role of SAA in weight gain. RESULTS With ASOSAA treatment, mice receiving an HFD did not differ in energy intake when compared with their controls, but were prevented from gaining weight and developing insulin resistance. The phenotype was characterised by a lack of adipose tissue expansion, with low accumulation of epididymal, retroperitoneal and subcutaneous fat content and decreased inflammatory markers, such as SAA3 and toll-like receptor (TLR)-4 expression, as well as macrophage infiltration into the adipose tissue. Furthermore, a metabolic status similar to chow-fed mice counterparts could be observed, with equivalent levels of leptin, adiponectin, IGF-I, SAA, fasting glucose and insulin, and remarkable improvement in glucose and insulin tolerance test profiles. Surprisingly, the expected HFD-induced metabolic endotoxaemia was also prevented by the ASOSAA treatment. CONCLUSIONS/INTERPRETATION This study provides further evidence of the role of SAA in weight gain and insulin resistance. Moreover, we also suggest that beyond its proliferative and inflammatory effects, SAA is part of the lipopolysaccharide signalling pathway that links inflammation to obesity and insulin resistance.
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Affiliation(s)
- Edson M de Oliveira
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, 580 Lineu Prestes Avenue, São Paulo, SP, 05508-000, Brazil
| | - Thais P Ascar
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, 580 Lineu Prestes Avenue, São Paulo, SP, 05508-000, Brazil
| | - Jacqueline C Silva
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, 580 Lineu Prestes Avenue, São Paulo, SP, 05508-000, Brazil
| | - Silvana Sandri
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, 580 Lineu Prestes Avenue, São Paulo, SP, 05508-000, Brazil
| | - Silene Migliorini
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, 580 Lineu Prestes Avenue, São Paulo, SP, 05508-000, Brazil
| | - Ricardo A Fock
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, 580 Lineu Prestes Avenue, São Paulo, SP, 05508-000, Brazil
| | - Ana Campa
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, 580 Lineu Prestes Avenue, São Paulo, SP, 05508-000, Brazil.
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15
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Serum amyloid A receptor blockade and incorporation into high-density lipoprotein modulates its pro-inflammatory and pro-thrombotic activities on vascular endothelial cells. Int J Mol Sci 2015; 16:11101-24. [PMID: 25988387 PMCID: PMC4463692 DOI: 10.3390/ijms160511101] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 03/25/2015] [Accepted: 04/27/2015] [Indexed: 02/07/2023] Open
Abstract
The acute phase protein serum amyloid A (SAA), a marker of inflammation, induces expression of pro-inflammatory and pro-thrombotic mediators including ICAM-1, VCAM-1, IL-6, IL-8, MCP-1 and tissue factor (TF) in both monocytes/macrophages and endothelial cells, and induces endothelial dysfunction—a precursor to atherosclerosis. In this study, we determined the effect of pharmacological inhibition of known SAA receptors on pro-inflammatory and pro-thrombotic activities of SAA in human carotid artery endothelial cells (HCtAEC). HCtAEC were pre-treated with inhibitors of formyl peptide receptor-like-1 (FPRL-1), WRW4; receptor for advanced glycation-endproducts (RAGE), (endogenous secretory RAGE; esRAGE) and toll-like receptors-2/4 (TLR2/4) (OxPapC), before stimulation by added SAA. Inhibitor activity was also compared to high-density lipoprotein (HDL), a known inhibitor of SAA-induced effects on endothelial cells. SAA significantly increased gene expression of TF, NFκB and TNF and protein levels of TF and VEGF in HCtAEC. These effects were inhibited to variable extents by WRW4, esRAGE and OxPapC either alone or in combination, suggesting involvement of endothelial cell SAA receptors in pro-atherogenic gene expression. In contrast, HDL consistently showed the greatest inhibitory action, and often abrogated SAA-mediated responses. Increasing HDL levels relative to circulating free SAA may prevent SAA-mediated endothelial dysfunction and ameliorate atherogenesis.
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16
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Eren E, Ellidag HY, Aydin O, Yilmaz N. HDL functionality and crystal-based sterile inflammation in atherosclerosis. Clin Chim Acta 2014; 439:18-23. [PMID: 25278350 DOI: 10.1016/j.cca.2014.09.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 09/05/2014] [Accepted: 09/22/2014] [Indexed: 01/22/2023]
Abstract
Change is inevitable. In early evolution, due to the limited availability of resources, the sole purpose of living organisms was to survive long enough to transmit their genes to the next generation. During their short lifetime, organisms used pathogen-associated and damage-associated molecular pattern pathways as an inflammatory response against pathogens (exogenous factors) and tissue damage (endogenous factors), respectively. Despite advances in human lifespan, it appears that an increasing number of diseases such as atherosclerosis are associated with inflammation. Excessive glucose, lipid and protein intake leads to the formation of endogenous crystals, i.e., cholesterol, which can induce a sterile inflammatory immune response that manifests as a vicious cycle. In this review, we evaluate the possible relationship between crystal-based sterile inflammatory response and HDL functionality.
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Affiliation(s)
- Esin Eren
- Atatürk Hospital, Biochemistry Laboratory, Antalya, Turkey
| | - Hamit Yasar Ellidag
- Central Laboratories of Antalya Training and Research Hospital, Antalya, Turkey
| | - Ozgur Aydin
- Maternity and Children's Hospital, Biochemistry Laboratory, Batman, Turkey
| | - Necat Yilmaz
- Central Laboratories of Antalya Training and Research Hospital, Antalya, Turkey
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17
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Tan SZ, Ooi DSQ, Shen HM, Heng CK. The Atherogenic Effects of Serum Amyloid A are Potentially Mediated via Inflammation and Apoptosis. J Atheroscler Thromb 2014; 21:854-67. [DOI: 10.5551/jat.22665] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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18
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Ishii W, Liepnieks JJ, Yamada T, Benson MD, Kluve-Beckerman B. Human SAA1-derived amyloid deposition in cell culture: a consistent model utilizing human peripheral blood mononuclear cells and serum-free medium. Amyloid 2013; 20:61-71. [PMID: 23461622 DOI: 10.3109/13506129.2013.775941] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Amyloid A (AA) amyloidosis is a fatal disease caused by extracellular deposition of fibrils derived from serum AA (SAA). AA amyloid fibril formation has previously been modeled in macrophage cultures using highly amyloidogenic mouse SAA1.1, but attempts to do the same with human SAA invariably failed. Our objective was to define conditions that support human SAA-derived amyloid formation in peripheral blood mononuclear cell (PBMC) cultures. Two conditions were found to be critical - omission of fetal calf serum and use of StemPro34, a lipid-enriched medium formulated for hematopoietic progenitor cells. Cultures maintained in serum-free StemPro34 and provided with recombinant human SAA1 in the complete absence of amyloid-enhancing factor exhibited amyloid deposition within 7 d. Amyloid co-localized with cell clusters that characteristically included cells of fibrocytic/dendritic morphology as well as macrophages. These cells formed networks that appeared to serve as scaffolding within and upon which amyloid accumulated. Cells in amyloid-forming cultures demonstrated increased adherence, survival and expression of extracellular matrix components. Of the three human SAA1 isoforms, SAA1.3 showed the most extensive amyloid deposition, consistent with it being the most prevalent isoform in Japanese patients with AA amyloidosis. Attesting to the reproducibility and general applicability of this model, amyloid formation has been documented in cultures established from eight PBMC donors.
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Affiliation(s)
- Wataru Ishii
- Department of Medicine (Neurology and Rheumatology), Shinshu Unviersity School of Medicine, Matsumoto, Japan
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19
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Inafuku M, Nagao K, Inafuku A, Yanagita T, Taira N, Toda T, Oku H. Dietary phosphatidylinositol protects C57BL/6 mice from concanavalin A-induced liver injury by modulating immune cell functions. Mol Nutr Food Res 2013; 57:1671-9. [PMID: 23653180 DOI: 10.1002/mnfr.201200607] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Revised: 01/15/2013] [Accepted: 02/15/2013] [Indexed: 11/08/2022]
Abstract
SCOPE Several recent studies have demonstrated that phospholipids (PLs) supplementation can modulate the function of cultured-immune cells. Furthermore, dietary PLs have been shown to ameliorate inflammatory processes and immune responses in arthritic and diabetic murine models, respectively. Thus, the aim of this study was to examine the immune-modulating activities of dietary soybean PLs in mice, with particular emphasis on the immune cell functions. METHODS AND RESULTS Mice were fed semisynthetic diets for 6 weeks, which contained either 7% soybean oil or 5% soybean oil plus 2% of either PL: phosphatidylcholine (PC), phosphatidylinositol (PI), or phosphatidylserine (PS). Production of concanavalin A (Con A)-induced proinflammatory cytokines was significantly decreased in the splenocytes isolated from mice fed PI compared to other lipids. Supplementation of the diet with PI, but not with the other lipids, significantly suppressed the proinflammatory cytokine serum levels and the development of Con A-induced liver damages. CONCLUSION These observations suggest that dietary PI influenced immune functions, resulting in the prevention of pathogenesis and development of the liver injury in mice.
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Affiliation(s)
- Masashi Inafuku
- Department of Mangroves and Bio-resources, Center of Molecular Biosciences, Tropical Biosphere Research Center, University of the Ryukyus, Okinawa, Japan
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