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Huang Z, Liu C, Zheng G, Zhang L, Zhong Q, Zhang Y, Zhao W, Qi Y. Articular Cartilage Regeneration via Induced Chondrocyte Autophagy by Sustained Release of Leptin Inhibitor from Thermo-Sensitive Hydrogel through STAT3/REDD1/mTORC1 Cascade. Adv Healthc Mater 2023; 12:e2302181. [PMID: 37673039 DOI: 10.1002/adhm.202302181] [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: 07/11/2023] [Revised: 09/03/2023] [Indexed: 09/08/2023]
Abstract
The pathophysiology of osteoarthritis (OA) is closely linked to autophagy abnormalities in articular chondrocytes, the sole mature cell type in healthy cartilage. Nevertheless, the precise molecular mechanism remains uncertain. Previous research has demonstrated that leptin activates mTORC1 , thereby inhibiting chondrocyte autophagy during the progression of OA. In this study, it is demonstrated that the presence of leptin induces a substantial increase in the expression of STAT3, leading to a notable decrease in REDD1 expression and subsequent phosphorylation of p70S6K, a recognized downstream effector of mTORC1. Conversely, inhibition of leptin yields contrasting effects. Additionally, the potential advantages of utilizing a sustained intra-articular release of a leptin inhibitor (LI) via an injectable, thermosensitive poly(D,L-lactide)-poly(ethylene glycol)-poly(D,L-lactide) (PDLLA-PEG-PDLLA: PLEL) hydrogel delivery system for the purpose of investigating its impact on cartilage repair are explored. The study conducted on LI-loaded PLEL (PLEL@LI) demonstrates remarkable efficacy in inhibiting OA and displays encouraging therapeutic advantages in the restoration of subchondral bone and cartilage. These findings establish a solid foundation for the advancement of a pioneering treatment approach utilizing PLEL@LI for OA.
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Affiliation(s)
- Zhongming Huang
- Ganzhou Municipal Key Laboratory of Bone and Joint Research, The Affiliated Ganzhou Hospital of Nanchang University, Ganzhou, 341000, China
| | - Chen Liu
- Ganzhou Municipal Key Laboratory of Bone and Joint Research, The Affiliated Ganzhou Hospital of Nanchang University, Ganzhou, 341000, China
| | - Guangping Zheng
- Ganzhou Municipal Key Laboratory of Bone and Joint Research, The Affiliated Ganzhou Hospital of Nanchang University, Ganzhou, 341000, China
| | - Liang Zhang
- Research Center of Translational Medicine, Jinan Central Hospital Affiliated to Shandong First Medical University, Jinan, 250013, China
| | - Qiang Zhong
- Ganzhou Municipal Key Laboratory of Bone and Joint Research, The Affiliated Ganzhou Hospital of Nanchang University, Ganzhou, 341000, China
| | - Yun Zhang
- Ganzhou Municipal Key Laboratory of Bone and Joint Research, The Affiliated Ganzhou Hospital of Nanchang University, Ganzhou, 341000, China
| | - Weicheng Zhao
- Ganzhou Municipal Key Laboratory of Bone and Joint Research, The Affiliated Ganzhou Hospital of Nanchang University, Ganzhou, 341000, China
| | - Yiying Qi
- Department of Orthopedics, Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310013, China
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Harasymowicz NS, Azfer A, Burnett R, Simpson H, Salter DM. Chondrocytes from osteoarthritic cartilage of obese patients show altered adiponectin receptors expression and response to adiponectin. J Orthop Res 2021; 39:2333-2339. [PMID: 33484170 DOI: 10.1002/jor.24993] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 11/27/2020] [Accepted: 01/19/2021] [Indexed: 02/04/2023]
Abstract
Obesity and osteoarthritis (OA) are well-known comorbidities and their precise molecular interactions are still unidentified. Adiponectin, a major adipokine, known to have an anti-inflammatory effect in atherosclerosis or Type 2 Diabetes Mellitus (T2DM), has also been postulated to be pro-inflammatory in OA. This dual role of adiponectin is still not explained. The precise mechanism by which adiponectin affects cartilage and chondrocytes remains to be elucidated. In the present observational study chondrocytes from 30 patients with OA (18 females and 12 males) undergoing total knee replacement (TKR) were isolated. Expression of adiponectin receptors 1 and 2 (ADIPOR1 and ADIPOR2) was examined both at gene and protein levels in chondrocytes. The difference in adiponectin receptor expression between lean and obese patients with OA and the role of adiponectin in regulating pro-inflammatory genes (MCP-1, IL-6, and VCAM-1, MMP-1, MMP-2, and TIMP-1) has been investigated. We found that ADIPOR1 represented the most abundant adiponectin receptor in primary OA chondrocytes. ADIPOR1 and ADIPOR2 genes and ADIPOR1 protein were differently expressed in OA chondrocytes obtained from obese compared with lean patients with OA. Adiponectin induced gene expression of MCP-1, IL-6, and MMP-1 in all OA patients' chondrocytes. In contrast, VCAM-1 and MMP-2 were differently regulated by adiponectin depending on the patient's body mass index. This study suggests that adiponectin and ADIPOR1 may have important roles in the pathogenesis of cartilage degeneration in OA of obese subjects.
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Affiliation(s)
| | - Asim Azfer
- Bone Research Group, Center for Genomics and Experimental Medicine, The University of Edinburgh, Edinburgh, UK
| | - Richard Burnett
- Department of Orthopaedics and Trauma, Royal Infirmary of Edinburgh, Edinburgh, Edinburgh, UK
| | - Hamish Simpson
- Department of Orthopaedics and Trauma, The University of Edinburgh, Edinburgh, UK
| | - Donald M Salter
- Bone Research Group, Center for Genomics and Experimental Medicine, The University of Edinburgh, Edinburgh, UK
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A Combination of Celecoxib and Glucosamine Sulfate Has Anti-Inflammatory and Chondroprotective Effects: Results from an In Vitro Study on Human Osteoarthritic Chondrocytes. Int J Mol Sci 2021; 22:ijms22168980. [PMID: 34445685 PMCID: PMC8396455 DOI: 10.3390/ijms22168980] [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: 07/07/2021] [Revised: 08/13/2021] [Accepted: 08/17/2021] [Indexed: 01/08/2023] Open
Abstract
This study investigated the possible anti-inflammatory and chondroprotective effects of a combination of celecoxib and prescription-grade glucosamine sulfate (GS) in human osteoarthritic (OA) chondrocytes and their possible mechanism of action. Chondrocytes were treated with celecoxib (1.85 µM) and GS (9 µM), alone or in combination with IL-1β (10 ng/mL) and a specific nuclear factor (NF)-κB inhibitor (BAY-11-7082, 1 µM). Gene expression and release of some pro-inflammatory mediators, metalloproteinases (MMPs), and type II collagen (Col2a1) were evaluated by qRT-PCR and ELISA; apoptosis and mitochondrial superoxide anion production were assessed by cytometry; B-cell lymphoma (BCL)2, antioxidant enzymes, and p50 and p65 NF-κB subunits were analyzed by qRT-PCR. Celecoxib and GS alone or co-incubated with IL-1β significantly reduced expression and release of cyclooxygenase (COX)-2, prostaglandin (PG)E2, IL-1β, IL-6, tumor necrosis factor (TNF)-α, and MMPs, while it increased Col2a1, compared to baseline or IL-1β. Both drugs reduced apoptosis and superoxide production; reduced the expression of superoxide dismutase, catalase, and nuclear factor erythroid; increased BCL2; and limited p50 and p65. Celecoxib and GS combination demonstrated an increased inhibitory effect on IL-1β than that observed by each single treatment. Drugs effects were potentiated by pre-incubation with BAY-11-7082. Our results demonstrated the synergistic effect of celecoxib and GS on OA chondrocyte metabolism, apoptosis, and oxidative stress through the modulation of the NF-κB pathway, supporting their combined use for the treatment of OA.
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Exploring the Crosstalk between Hydrostatic Pressure and Adipokines: An In Vitro Study on Human Osteoarthritic Chondrocytes. Int J Mol Sci 2021; 22:ijms22052745. [PMID: 33803113 PMCID: PMC7963177 DOI: 10.3390/ijms22052745] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Accepted: 03/02/2021] [Indexed: 02/07/2023] Open
Abstract
Obesity is a risk factor for osteoarthritis (OA) development and progression due to an altered biomechanical stress on cartilage and an increased release of inflammatory adipokines from adipose tissue. Evidence suggests an interplay between loading and adipokines in chondrocytes metabolism modulation. We investigated the role of loading, as hydrostatic pressure (HP), in regulating visfatin-induced effects in human OA chondrocytes. Chondrocytes were stimulated with visfatin (24 h) and exposed to high continuous HP (24 MPa, 3 h) in the presence of visfatin inhibitor (FK866, 4 h pre-incubation). Apoptosis and oxidative stress were detected by cytometry, B-cell lymphoma (BCL)2, metalloproteinases (MMPs), type II collagen (Col2a1), antioxidant enzymes, miRNA, cyclin D1 expressions by real-time PCR, and β-catenin protein by western blot. HP exposure or visfatin stimulus significantly induced apoptosis, superoxide anion production, and MMP-3, -13, antioxidant enzymes, and miRNA gene expression, while reducing Col2a1 and BCL2 mRNA. Both stimuli significantly reduced β-catenin protein and increased cyclin D1 gene expression. HP exposure exacerbated visfatin-induced effects, which were counteracted by FK866 pre-treatment. Our data underline the complex interplay between loading and visfatin in controlling chondrocytes' metabolism, contributing to explaining the role of obesity in OA etiopathogenesis, and confirming the importance of controlling body weight for disease treatment.
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Cheleschi S, Barbarino M, Gallo I, Tenti S, Bottaro M, Frati E, Giannotti S, Fioravanti A. Hydrostatic Pressure Regulates Oxidative Stress through microRNA in Human Osteoarthritic Chondrocytes. Int J Mol Sci 2020; 21:ijms21103653. [PMID: 32455798 PMCID: PMC7279254 DOI: 10.3390/ijms21103653] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 05/18/2020] [Accepted: 05/19/2020] [Indexed: 02/07/2023] Open
Abstract
Hydrostatic pressure (HP) modulates chondrocytes metabolism, however, its ability to regulate oxidative stress and microRNAs (miRNA) has not been clarified. The aim of this study was to investigate the role of miR-34a, miR-146a, and miR-181a as possible mediators of HP effects on oxidative stress in human osteoarthritis (OA) chondrocytes. Chondrocytes were exposed to cyclic low HP (1–5 MPa) and continuous static HP (10 MPa) for 3~h. Metalloproteinases (MMPs), disintegrin and metalloproteinase with thrombospondin motif (ADAMTS)-5, type II collagen (Col2a1), miR-34a, miR-146a, miR-181a, antioxidant enzymes, and B-cell lymphoma 2 (BCL2) were evaluated by quantitative real-time polymerase chain reaction qRT-PCR, apoptosis and reactive oxygen species ROS production by cytometry, and β-catenin by immunofluorescence. The relationship among HP, the studied miRNA, and oxidative stress was assessed by transfection with miRNA specific inhibitors. Low cyclical HP significantly reduced apoptosis, the gene expression of MMP-13, ADAMTS5, miRNA, the production of superoxide anion, and mRNA levels of antioxidant enzymes. Conversely, an increased Col2a1 and BCL2 genes was observed. β-catenin protein expression was reduced in cells exposed to HP 1–5 MPa. Opposite results were obtained following continuous static HP application. Finally, miRNA silencing enhanced low HP and suppressed continuous HP-induced effects. Our data suggest miRNA as one of the mechanisms by which HP regulates chondrocyte metabolism and oxidative stress, via Wnt/β-catenin pathway.
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Affiliation(s)
- Sara Cheleschi
- Department of Medicine, Surgery and Neuroscience, Rheumatology Unit, Azienda Ospedaliera Universitaria Senese, Policlinico Le Scotte, 53100 Siena, Italy; (I.G.); (S.T.); (E.F.); (A.F.)
- Correspondence: ; Tel.: +39 0577 233471
| | - Marcella Barbarino
- Department of Medical Biotechnologies, University of Siena, 53100 Siena, Italy; (M.B.); (M.B.)
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia, PA 19122, USA
| | - Ines Gallo
- Department of Medicine, Surgery and Neuroscience, Rheumatology Unit, Azienda Ospedaliera Universitaria Senese, Policlinico Le Scotte, 53100 Siena, Italy; (I.G.); (S.T.); (E.F.); (A.F.)
| | - Sara Tenti
- Department of Medicine, Surgery and Neuroscience, Rheumatology Unit, Azienda Ospedaliera Universitaria Senese, Policlinico Le Scotte, 53100 Siena, Italy; (I.G.); (S.T.); (E.F.); (A.F.)
| | - Maria Bottaro
- Department of Medical Biotechnologies, University of Siena, 53100 Siena, Italy; (M.B.); (M.B.)
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia, PA 19122, USA
| | - Elena Frati
- Department of Medicine, Surgery and Neuroscience, Rheumatology Unit, Azienda Ospedaliera Universitaria Senese, Policlinico Le Scotte, 53100 Siena, Italy; (I.G.); (S.T.); (E.F.); (A.F.)
| | - Stefano Giannotti
- Department of Medicine, Surgery and Neurosciences, Section of Orthopedics and Traumatology, University of Siena, Policlinico Le Scotte, 53100 Siena, Italy;
| | - Antonella Fioravanti
- Department of Medicine, Surgery and Neuroscience, Rheumatology Unit, Azienda Ospedaliera Universitaria Senese, Policlinico Le Scotte, 53100 Siena, Italy; (I.G.); (S.T.); (E.F.); (A.F.)
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Gao YH, Zhao CW, Liu B, Dong N, Ding L, Li YR, Liu JG, Feng W, Qi X, Jin XH. An update on the association between metabolic syndrome and osteoarthritis and on the potential role of leptin in osteoarthritis. Cytokine 2020; 129:155043. [PMID: 32078923 DOI: 10.1016/j.cyto.2020.155043] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 01/22/2020] [Accepted: 02/11/2020] [Indexed: 12/23/2022]
Abstract
Metabolic syndrome (MetS) has been associated with osteoarthritis (OA). Leptin, which is one of the markers of MetS, has been associated with OA pathophysiology. This study aimed to provide an update on the association between MetS and OA and on the potential role of leptin in OA. In this review, we summarized the current knowledge of the association between MetS and OA and updated the evidence on the potential role of leptin in OA. Clinical studies have investigated the epidemiologic association between MetS or its components and OA. Results suggested strong epidemiologic associations between MetS and OA, especially in the Asian population. Animal studies also indicated that metabolic dysregulation may lead to OA pathogenesis. The systemic role of MetS in OA pathophysiology is associated with obesity-related inflammation, the beneficial role of n-3 polyunsaturated fatty acids and deleterious role of cholesterol, physical inactivity, hypertension-induced subchondral ischemia, dyslipidemia-induced ectopic lipid deposition in chondrocytes, hyperglycemia-induced local effects of oxidative stress and advanced glycation end-products, low-grade systemic inflammation, and obesity-related adipokines by inducing the expression of proinflammtory factors. Leptin levels in serum/plasma and synovial fluid were associated with joint pain, radiographic progression, bone formation biomarkers, cartilage volume, knee OA incidence, and total joint arthroplasty in OA patients. Elevated leptin expression and increased effect of leptin on infrapatellar fat pad, synovium, articular cartilage, and bone were also involved in the pathogenesis of OA. Current knowledge indicates a convincing epidemiologic association between MetS and OA, especially in the Asian population. Animal studies have also shown that metabolic dysregulation may lead to OA pathogenesis. Accumulating evidence suggests that leptin may play a potential role in OA pathogenesis. Therefore, leptin and its receptor may be an emerging target for intervention in metabolic-associated OA.
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Affiliation(s)
- Yu-Hang Gao
- Department of Orthopaedic Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, China
| | - Cheng-Wu Zhao
- Department of Sports Medicine, The First Hospital of Jilin University, Changchun, Jilin 130021, China
| | - Bo Liu
- Department of Ultrasound, The First Hospital of Jilin University, Changchun, Jilin 130021, China
| | - Ning Dong
- Department of Pediatric Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, China
| | - Lu Ding
- Department of Orthopaedic Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, China
| | - Ye-Ran Li
- Department of Orthopaedic Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, China
| | - Jian-Guo Liu
- Department of Orthopaedic Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, China
| | - Wei Feng
- Department of Orthopaedic Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, China
| | - Xin Qi
- Department of Orthopaedic Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, China.
| | - Xian-Hua Jin
- Department of Dermatology, The Second Hospital of Jilin University, Changchun, Jilin 130022, China.
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Ding L, Gao YH, Li YR, Huang YF, Wang XY, Qi X. Metabolic Score for Insulin Resistance Is Correlated to Adipokine Disorder and Inflammatory Activity in Female Knee Osteoarthritis Patients in a Chinese Population. Diabetes Metab Syndr Obes 2020; 13:2109-2118. [PMID: 32606869 PMCID: PMC7310993 DOI: 10.2147/dmso.s249025] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Accepted: 05/26/2020] [Indexed: 12/20/2022] Open
Abstract
PURPOSE This study was to evaluate the metabolic score for insulin resistance (METS-IR) in female knee osteoarthritis (KOA) patients in a Chinese population. The associations between METS-IR and adipokines, erythrocyte sedimentation rate (ESR), and C-reactive protein (CRP) were investigated. PATIENTS AND METHODS This study included 4686 women from the 2011 China Health and Retirement Longitudinal Study (CHARLS) and 108 women who underwent arthroplasty of KOA at a university hospital. The clinical data were collected, and adipokines were evaluated. METS-IR was calculated in the KOA patients and compared with the national baseline. Logistic regression analyses were applied to explore the associations of METS-IR with adipokines, ESR, and CRP. RESULTS Receiver operating characteristic curve analysis of METS-IR and metabolic syndrome (MetS) in national baseline showed an area under the curve value of 0.851, with sensitivity of 0.777 and specificity of 0.772. The METS-IR of KOA was higher than the national baseline level (40.29 ± 6.98 vs 36.20 ± 8.50, P < 0.01), even after adjusting age. In addition, the METS-IR was higher in patients with KOA who had MetS than in those without metabolic syndrome (nMetS), even after adjusting body mass index (BMI). After adjusting for age and BMI, METS-IR was associated with CRP (OR 1.238, 95% confidence interval (CI) 1.088, 1.409, P < 0.01), ESR (OR 1.124, 95% CI 1.008, 1.254, P = 0.036), plasma leptin (OR 1.123, 95% CI 1.052, 1.199, P < 0.01), plasma resistin (OR 1.134, 95% CI 1.011, 1.271, P = 0.031), and plasma adiponectin (OR 0.865, 95% CI 0.771, 0.971, P = 0.014). CONCLUSION METS-IR in female KOA was higher than that of the national baseline. The METS-IR was related to adipokine disorder and inflammatory activity. These findings suggest that METS-IR can be used to evaluate the degree of involvement of MetS in KOA.
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Affiliation(s)
- Lu Ding
- Department of Orthopaedic Surgery, The First Hospital of Jilin University, Jilin University, Chang Chun, People’s Republic of China
| | - Yu-Hang Gao
- Department of Orthopaedic Surgery, The First Hospital of Jilin University, Jilin University, Chang Chun, People’s Republic of China
| | - Ye-Ran Li
- Department of Orthopaedic Surgery, The First Hospital of Jilin University, Jilin University, Chang Chun, People’s Republic of China
| | - Yi-Fan Huang
- Department of Orthopaedic Surgery, The First Hospital of Jilin University, Jilin University, Chang Chun, People’s Republic of China
| | - Xin-Yu Wang
- Department of Orthopaedic Surgery, The First Hospital of Jilin University, Jilin University, Chang Chun, People’s Republic of China
| | - Xin Qi
- Department of Orthopaedic Surgery, The First Hospital of Jilin University, Jilin University, Chang Chun, People’s Republic of China
- Correspondence: Xin Qi Department of Orthopaedic Surgery, The First Hospital of Jilin University, Jilin University, Xinmin St 71, Chang Chun,People’s Republic of ChinaTel +8615843073202Fax +86043181875600 Email
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MicroRNA-34a and MicroRNA-181a Mediate Visfatin-Induced Apoptosis and Oxidative Stress via NF-κB Pathway in Human Osteoarthritic Chondrocytes. Cells 2019; 8:cells8080874. [PMID: 31405216 PMCID: PMC6721672 DOI: 10.3390/cells8080874] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 07/31/2019] [Accepted: 08/09/2019] [Indexed: 01/16/2023] Open
Abstract
Current evidence suggests a complex interaction between adipokines and microRNA (miRNA) in osteoarthritis (OA) pathogenesis. The present study explored the role of miR-34a and miR-181a in regulating apoptosis and oxidative stress induced by visfatin in human OA chondrocytes. Chondrocytes were transfected with miR-34a and miR-181a inhibitors and stimulated with visfatin for 24 h, in the presence of nuclear factor (NF)-κB inhibitor (BAY-11-7082, 2 h pre-incubation). Apoptosis and reactive oxygen species (ROS) production were detected by cytometry, miRNA, antioxidant enzymes, nuclear factor erythroid (NRF)2 and B-cell lymphoma (BCL)2 expressions by quantitative real time polymerase chain reaction (real time PCR) and western blot. P50 NF-κB subunit was measured by immunofluorescence. Visfatin significantly induced apoptosis and superoxide anion production, increased miR-34a, miR-181a, superoxide dismutase (SOD)-2, catalase (CAT), NRF2 and decreased BCL2 gene and protein expression in OA chondrocytes. All the visfatin-caused effects were suppressed by using miR-34a and miR-181a inhibitors. Pre-incubation with BAY-11-7082 counteracted visfatin-induced expression of miRNA, BCL2, SOD-2, CAT and NRF2. Inhibition of miR-34a and miR-181a significantly reduced the activation of p50 NF-κB. Visfatin confirms its ability to induce apoptosis and oxidative stress in human OA chondrocytes; these effects appeared mediated by miR-34a and miR-181a via NF-κB pathway. We highlight the relevance of visfatin as potential therapeutic target for OA treatment.
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Fu R, Han F, Liu L, Yu F, Gui Z, Wang X, Li B, Fang B, Xia L. The Effects of Leptin on the Proliferation and Differentiation of Primary Chondrocytes in Vitro and Cartilage Regeneration in Vivo. ACS Biomater Sci Eng 2019; 5:1907-1919. [PMID: 33405564 DOI: 10.1021/acsbiomaterials.8b01168] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Runqing Fu
- Department of Orthodontics, Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Fengxuan Han
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Lu Liu
- Department of Orthodontics, Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Fei Yu
- Department of Orthodontics, Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Zhipeng Gui
- Department of Oral Surgery, Shanghai Ninth People’s Hospital Affiliated with Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Xiaoting Wang
- Department of Orthodontics, Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Bin Li
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Bing Fang
- Department of Orthodontics, Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Lunguo Xia
- Department of Orthodontics, Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
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Zhang S, Zhao Y, Wang Y, Muhammad I, Ma N, Bie L, Zhao L, Zhu Z, Meng X, Cong L, Hu L, Xiao J. Effects of Leptin on Differentiation and Proliferation of Chondrocytes. J HARD TISSUE BIOL 2019. [DOI: 10.2485/jhtb.28.51] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Shai Zhang
- Department of clinical veterinary, School of Veterinary Medicine, Northeast Agricultural University
| | - Yang Zhao
- Department of clinical veterinary, School of Veterinary Medicine, Northeast Agricultural University
| | - Yifan Wang
- Department of clinical veterinary, School of Veterinary Medicine, Northeast Agricultural University
| | - Ishfaq Muhammad
- Deapartment of Veterinary Pharmacology and Toxicology, School of Veterinary Medicine, Northeast Agricultural University
| | - Ning Ma
- Department of clinical veterinary, School of Veterinary Medicine, Northeast Agricultural University
| | - Lianyu Bie
- Department of clinical veterinary, School of Veterinary Medicine, Northeast Agricultural University
| | - Lidong Zhao
- Department of clinical veterinary, School of Veterinary Medicine, Northeast Agricultural University
| | - Zihan Zhu
- Department of clinical veterinary, School of Veterinary Medicine, Northeast Agricultural University
| | - Xinghua Meng
- Department of clinical veterinary, School of Veterinary Medicine, Northeast Agricultural University
| | - Linlin Cong
- Department of clinical veterinary, School of Veterinary Medicine, Northeast Agricultural University
| | - Lan Hu
- Department of clinical veterinary, School of Veterinary Medicine, Northeast Agricultural University
| | - Jianhua Xiao
- Department of clinical veterinary, School of Veterinary Medicine, Northeast Agricultural University
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A Complex Relationship between Visfatin and Resistin and microRNA: An In Vitro Study on Human Chondrocyte Cultures. Int J Mol Sci 2018; 19:ijms19123909. [PMID: 30563239 PMCID: PMC6320832 DOI: 10.3390/ijms19123909] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 11/26/2018] [Accepted: 12/05/2018] [Indexed: 12/13/2022] Open
Abstract
Growing evidence indicates the important role of adipokines and microRNA (miRNA) in osteoarthritis (OA) pathogenesis. The purpose of the present study was to investigate the effect of visfatin and resistin on some miRNA (34a, 140, 146a, 155, 181a, let-7e), metalloproteinases (MMPs), and collagen type II alpha 1 chain (Col2a1) in human OA chondrocytes and in the T/C-28a2 cell line. The implication of nuclear factor (NF)-κB in response to adipokines was also assessed. Chondrocytes were stimulated with visfatin (5 or 10 μg/mL) and resistin (50 or 100 ng/mL) with or without NF-κB inhibitor (BAY-11-7082, 1 μM) for 24 h. Viability and apoptosis were detected by MMT and cytometry, miRNA, MMP-1, MMP-13, and Col2a1 by qRT-PCR and NF-κB activation by immunofluorescence. Visfatin and resistin significantly reduced viability, induced apoptosis, increased miR-34a, miR-155, miR-181a, and miR-let7e, and reduced miR-140 and miR-146a gene expression in OA chondrocytes. MMP-1, MMP-13, and Col2a1 were significantly modulated by treatment of OA chondrocytes with adipokines. Visfatin and resistin significantly increased NF-κB activation, while the co-treatment with BAY11-7082 did not change MMPs or Col2a1 levels beyond that caused by single treatment. Visfatin and resistin regulate the expression levels of some miRNA involved in OA pathogenesis and exert catabolic functions in chondrocytes via the NF-κB pathway. These data confirm the complex relationship between adipokines and miRNA.
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Adipokine Contribution to the Pathogenesis of Osteoarthritis. Mediators Inflamm 2017; 2017:5468023. [PMID: 28490838 PMCID: PMC5401756 DOI: 10.1155/2017/5468023] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 02/25/2017] [Accepted: 03/07/2017] [Indexed: 12/13/2022] Open
Abstract
Recent studies have shown that overweight and obesity play an important role in the development of osteoarthritis (OA). However, joint overload is not the only risk factor in this disease. For instance, the presence of OA in non-weight-bearing joints such as the hand suggests that metabolic factors may also contribute to its pathogenesis. Recently, white adipose tissue (WAT) has been recognized not only as an energy reservoir but also as an important secretory organ of adipokines. In this regard, adipokines have been closely associated with obesity and also play an important role in bone and cartilage homeostasis. Furthermore, drugs such as rosuvastatin or rosiglitazone have demonstrated chondroprotective and anti-inflammatory effects in cartilage explants from patients with OA. Thus, it seems that adipokines are important factors linking obesity, adiposity, and inflammation in OA. In this review, we are focused on establishing the physiological mechanisms of adipokines on cartilage homeostasis and evaluating their role in the pathophysiology of OA based on evidence derived from experimental research as well as from clinical-epidemiological studies.
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Bianchi A, Guibert M, Cailotto F, Gasser A, Presle N, Mainard D, Netter P, Kempf H, Jouzeau JY, Reboul P. Fibroblast Growth Factor 23 drives MMP13 expression in human osteoarthritic chondrocytes in a Klotho-independent manner. Osteoarthritis Cartilage 2016; 24:1961-1969. [PMID: 27307356 DOI: 10.1016/j.joca.2016.06.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 06/02/2016] [Accepted: 06/07/2016] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Fibroblast Growth Factor 23 (FGF23) may represent an attractive candidate that could participate to the osteoarthritic (OA)-induced phenotype switch of chondrocytes. To address this hypothesis, we investigated the expression of FGF23, its receptors (FGFRs) and co-receptor (Klotho) in human cartilage and studied the effects of rhFGF23 on OA chondrocytes. METHOD Gene expression or protein levels were analysed by RT-PCR and immunohistochemistry. Collagenase 3 (MMP13) activity was measured by a fluorescent assay. MAPK signalling pathways were investigated by phosphoprotein array, immunoblotting and the use of selective inhibitors. RNA silencing was performed to confirm the respective contribution of FGFR1 and Klotho. RESULTS We showed that the expression of FGF23, FGFR1 and Klotho was up-regulated at both mRNA and protein levels in OA chondrocytes when compared to healthy ones. These overexpressions were markedly elevated in the damaged regions of OA cartilage. When stimulated with rhFGF23, OA chondrocytes displayed an extended expression of FGF23 and of markers of hypertrophy such as MMP13, COL10A1, and VEGF. We demonstrated that FGF23 auto-stimulation was both FGFR1-and Klotho-dependent, whereas the expression of markers of hypertrophy was mainly dependent on FGFR1 alone. Finally, we showed that FGF23-induced MMP13 expression was strongly regulated by the MEK/ERK cascade and to a lesser extent, by the PI-3K/AKT pathway. CONCLUSION These results demonstrate that FGF23 sustains differentiation of OA chondrocytes in a Klotho-independent manner.
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Affiliation(s)
- A Bianchi
- UMR 7365 CNRS-Université de Lorraine « Ingénierie Moléculaire et Physiopathologie Articulaire » (IMoPA), Biopôle de l'Université de Lorraine, Campus Biologie-Santé, Vandœuvre-lès-Nancy, France.
| | - M Guibert
- UMR 7365 CNRS-Université de Lorraine « Ingénierie Moléculaire et Physiopathologie Articulaire » (IMoPA), Biopôle de l'Université de Lorraine, Campus Biologie-Santé, Vandœuvre-lès-Nancy, France.
| | - F Cailotto
- UMR 7365 CNRS-Université de Lorraine « Ingénierie Moléculaire et Physiopathologie Articulaire » (IMoPA), Biopôle de l'Université de Lorraine, Campus Biologie-Santé, Vandœuvre-lès-Nancy, France.
| | - A Gasser
- UMR 7365 CNRS-Université de Lorraine « Ingénierie Moléculaire et Physiopathologie Articulaire » (IMoPA), Biopôle de l'Université de Lorraine, Campus Biologie-Santé, Vandœuvre-lès-Nancy, France.
| | - N Presle
- UMR 7365 CNRS-Université de Lorraine « Ingénierie Moléculaire et Physiopathologie Articulaire » (IMoPA), Biopôle de l'Université de Lorraine, Campus Biologie-Santé, Vandœuvre-lès-Nancy, France.
| | - D Mainard
- UMR 7365 CNRS-Université de Lorraine « Ingénierie Moléculaire et Physiopathologie Articulaire » (IMoPA), Biopôle de l'Université de Lorraine, Campus Biologie-Santé, Vandœuvre-lès-Nancy, France; Département de Chirurgie Orthopédique et Traumatologique, Centre Hospitalier Universitaire, Nancy, France.
| | - P Netter
- UMR 7365 CNRS-Université de Lorraine « Ingénierie Moléculaire et Physiopathologie Articulaire » (IMoPA), Biopôle de l'Université de Lorraine, Campus Biologie-Santé, Vandœuvre-lès-Nancy, France; Département de Pharmacologie Clinique et Toxicologie, Centre Hospitalier Universitaire, Nancy, France.
| | - H Kempf
- UMR 7365 CNRS-Université de Lorraine « Ingénierie Moléculaire et Physiopathologie Articulaire » (IMoPA), Biopôle de l'Université de Lorraine, Campus Biologie-Santé, Vandœuvre-lès-Nancy, France.
| | - J-Y Jouzeau
- UMR 7365 CNRS-Université de Lorraine « Ingénierie Moléculaire et Physiopathologie Articulaire » (IMoPA), Biopôle de l'Université de Lorraine, Campus Biologie-Santé, Vandœuvre-lès-Nancy, France; Département de Pharmacologie Clinique et Toxicologie, Centre Hospitalier Universitaire, Nancy, France.
| | - P Reboul
- UMR 7365 CNRS-Université de Lorraine « Ingénierie Moléculaire et Physiopathologie Articulaire » (IMoPA), Biopôle de l'Université de Lorraine, Campus Biologie-Santé, Vandœuvre-lès-Nancy, France.
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Lewis R, Barrett-Jolley R. Changes in Membrane Receptors and Ion Channels as Potential Biomarkers for Osteoarthritis. Front Physiol 2015; 6:357. [PMID: 26648874 PMCID: PMC4664663 DOI: 10.3389/fphys.2015.00357] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 11/11/2015] [Indexed: 01/01/2023] Open
Abstract
Osteoarthritis (OA), a degenerative joint condition, is currently difficult to detect early enough for any of the current treatment options to be completely successful. Early diagnosis of this disease could increase the numbers of patients who are able to slow its progression. There are now several diseases where membrane protein biomarkers are used for early diagnosis. The numbers of proteins in the membrane is vast and so it is a rich source of potential biomarkers for OA but we need more knowledge of these before they can be considered practical biomarkers. How are they best measured and are they selective to OA or even certain types of OA? The first step in this process is to identify membrane proteins that change in OA. Here, we summarize several ion channels and receptors that change in OA models and/or OA patients, and may thus be considered candidates as novel membrane biomarkers of OA.
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Affiliation(s)
- Rebecca Lewis
- Faculty of Health and Medical Sciences, School of Veterinary Medicine and Science, University of Surrey Guildford, UK
| | - Richard Barrett-Jolley
- Department of Musculoskeletal Biology, Faculty of Health and Life Sciences, Institute of Ageing and Chronic Disease, University of Liverpool Liverpool, UK
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Landry D, Paré A, Jean S, Martin LJ. Adiponectin influences progesterone production from MA-10 Leydig cells in a dose-dependent manner. Endocrine 2015; 48:957-67. [PMID: 25338202 DOI: 10.1007/s12020-014-0456-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Accepted: 10/13/2014] [Indexed: 12/28/2022]
Abstract
Obesity in men is associated with lower testosterone levels, related to reduced sperm concentration and the development of various diseases with aging. Hormones produced by the adipose tissue may have influences on both metabolism and reproductive function. Among them, the production and secretion of adiponectin is inversely correlated to total body fat. Adiponectin receptors (AdipoR1 and AdipoR2) have been found to be expressed in testicular Leydig cells (producing testosterone). Since StAR and Cyp11a1 are essential for testosterone synthesis and adiponectin has been shown to regulate StAR mRNA in swine granulosa cells, we hypothesized that adiponectin might also regulate these genes in Leydig cells. Our objective was to determine whether adiponectin regulates StAR and Cyp11a1 genes in Leydig cells and to better define its mechanisms of action. Methods used in the current study are qPCR for the mRNA levels, transfections for promoter activities, and enzyme-linked immunosorbent assay for the progesterone concentration. We have found that adiponectin cooperates with cAMP-dependent stimulation to activate StAR and Cyp11a1 mRNA expressions in a dose-dependent manner in MA-10 Leydig cells as demonstrated by transfection of a luciferase reporter plasmid. These results led to a significant increase in progesterone production from MA-10 cells. Thus, our data suggest that high doses of adiponectin typical of normal body weight may promote testosterone production from Leydig cells.
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Affiliation(s)
- David Landry
- Biology Department, Université de Moncton, 18, avenue Antonine Maillet, Moncton, NB, E1A 3E9, Canada
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Bouvard B, Abed E, Yéléhé-Okouma M, Bianchi A, Mainard D, Netter P, Jouzeau JY, Lajeunesse D, Reboul P. Hypoxia and vitamin D differently contribute to leptin and dickkopf-related protein 2 production in human osteoarthritic subchondral bone osteoblasts. Arthritis Res Ther 2014; 16:459. [PMID: 25312721 PMCID: PMC4302570 DOI: 10.1186/s13075-014-0459-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Accepted: 09/18/2014] [Indexed: 12/17/2022] Open
Abstract
Introduction Bone remodelling and increased subchondral densification are important in osteoarthritis (OA). Modifications of bone vascularization parameters, which lead to ischemic episodes associated with hypoxic conditions, have been suspected in OA. Among several factors potentially involved, leptin and dickkopf-related protein 2 (DKK2) are good candidates because they are upregulated in OA osteoblasts (Obs). Therefore, in the present study, we investigated the hypothesis that hypoxia may drive the expression of leptin and DKK2 in OA Obs. Methods Obs from the sclerotic portion of OA tibial plateaus were cultured under either 20% or 2% oxygen tension in the presence or not of 50 nM 1,25-dihydroxyvitamin D3 (VitD3). The expression of leptin, osteocalcin, DKK2, hypoxia-inducible factor 1α (Hif-1α) and Hif-2α was measured by real-time polymerase chain reaction and leptin production was measured by enzyme-linked immunosorbent assay (ELISA). The expression of Hif-1α, Hif-2α, leptin and DKK2 was reduced using silencing RNAs (siRNAs). The signalling pathway of hypoxia-induced leptin was investigated by Western blot analysis and with mitogen-activated protein kinase (MAPK) inhibitors. Results The expression of leptin and DKK2 in Obs was stimulated 7-fold and 1.8-fold, respectively (P <0.05) under hypoxia. Interestingly, whereas VitD3 stimulated leptin and DKK2 expression 2- and 4.2-fold, respectively, under normoxia, it stimulated their expression by 28- and 6.2-fold, respectively, under hypoxia (P <0.05). The hypoxia-induced leptin production was confirmed by ELISA, particularly in the presence of VitD3 (P <0.02). Compared to Obs incubated in the presence of scramble siRNAs, siHif-2α inhibited VitD3-stimulated leptin mRNA and protein levels by 70% (P =0.004) and 60% (P <0.02), respectively, whereas it failed to significantly alter the expression of DKK2. siHif-1α has no effect on these genes. Immunoblot analysis showed that VitD3 greatly stabilized Hif-2α under hypoxic conditions. The increase in leptin expression under hypoxia was also regulated, by p38 MAPK (P <0.03) and phosphoinositide 3-kinase (P <0.05). We found that the expression of leptin and DKK2 were not related to each other under hypoxia. Conclusions Hypoxic conditions via Hif-2 regulation trigger Obs to produce leptin, particularly under VitD3 stimulation, whereas DKK2 is regulated mainly by VitD3 rather than hypoxia.
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Hooshmand S, Juma S, Khalil DA, Shamloufard P, Arjmandi BH. Women with Osteoarthritis have Elevated Synovial Fluid Levels of Insulin-Like Growth Factor (IGF)-1 and IGF-Binding Protein-3. J Immunoassay Immunochem 2014; 36:284-94. [DOI: 10.1080/15321819.2014.947431] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Iwata M, Ochi H, Hara Y, Tagawa M, Koga D, Okawa A, Asou Y. Initial responses of articular tissues in a murine high-fat diet-induced osteoarthritis model: pivotal role of the IPFP as a cytokine fountain. PLoS One 2013; 8:e60706. [PMID: 23593289 PMCID: PMC3625196 DOI: 10.1371/journal.pone.0060706] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Accepted: 03/01/2013] [Indexed: 01/14/2023] Open
Abstract
Obesity and high body mass index are associated with a higher incidence of osteoarthritis (OA). The aim of this study is to investigate the involvement of the infrapatellar fat pad (IPFP) in the sub-acute effect of a high fat diet (HFD) on the development of knee-OA. C57BL/6J male mice were fed either a HFD or a normal diet beginning at seven weeks of age. Tissue sections were evaluated with immunohistological analysis. The IPFP was excised, and mRNA expression profiles were compared using real-time RT-PCR analysis. Osteoarthritic changes were initiated in the HFD group after eight weeks of the HFD. Increased synovial cell number and angiogenesis at the anterior edge of the tibial plateau were exhibited prior to osteophyte formation. Quantitative histological analysis indicated that osteophyte volume was significantly increased in the HFD group after eight weeks, along with an increase in the IPFP volume, the size of individual adipocytes and the number of vessels in the IPFP. Histomorphometrical analysis revealed osteophyte area was significantly associated with IPFP area, individual adipocyte area and vascular area. Real-time RT-PCR analysis demonstrated elevated mRNA expression of inflammatory cytokines, growth factor, and adipokines in the IPFP after eight weeks of the HFD. These findings are in parallel with increased expression of the CD68 macrophage marker after eight weeks of the HFD. Expression levels of the adipokines were significantly correlated with expression of TNF-α, VEGF and TGF-β. Immunohistological analysis revealed that the Nampt protein was highly expressed in the IPFP especially around the site of osteophyte formation. Apoptosis and proliferation of chondrocytes were both enhanced at the site of osteophyte formation, indicating higher cell turnover at this region. These observations suggest the IPFP plays a pivotal role in the formation of osteophytes and functions as a secretory organ in response to a HFD.
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Affiliation(s)
- Munetaka Iwata
- Division of Veterinary Surgery, School of Veterinary Medicine, Nippon Veterinary and Life Science University, Musashino-shi, Tokyo Japan
| | - Hiroki Ochi
- Laboratory of Veterinary Microbiology, Nippon Veterinary and Life Science University, Musashino-shi, Tokyo Japan
| | - Yasushi Hara
- Division of Veterinary Surgery, School of Veterinary Medicine, Nippon Veterinary and Life Science University, Musashino-shi, Tokyo Japan
| | - Masahiro Tagawa
- Division of Veterinary Surgery, School of Veterinary Medicine, Nippon Veterinary and Life Science University, Musashino-shi, Tokyo Japan
| | - Daisuke Koga
- Department of Orthopaedic Surgery, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo Japan
| | - Atsushi Okawa
- Department of Orthopaedic Surgery, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo Japan
| | - Yoshinori Asou
- Department of Orthopaedic Surgery, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo Japan
- * E-mail:
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Adiponectin and leptin induce VCAM-1 expression in human and murine chondrocytes. PLoS One 2012; 7:e52533. [PMID: 23285079 PMCID: PMC3526577 DOI: 10.1371/journal.pone.0052533] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Accepted: 11/19/2012] [Indexed: 12/13/2022] Open
Abstract
Background Osteoarthritis (OA) and rheumatoid arthritis (RA), the most common rheumatic diseases, are characterized by irreversible degeneration of the joint tissues. There are several factors involved in the pathogenesis of these diseases including pro-inflammatory cytokines, adipokines and adhesion molecules. Objective Up to now, the relationship between adipokines and adhesion molecules at cartilage level was not explored. Thus, the aim of this article was to study the effect of leptin and adiponectin on the expression of VCAM-1 in human and murine chondrocytes. For completeness, intracellular signal transduction pathway was also explored. Methods VCAM-1 expression was assessed by quantitative RT-PCR and western blot analysis upon treatment with leptin, adiponectin and other pertinent reagents in cultured human primary chondrocytes. Signal transduction pathways have been explored by using specific pharmacological inhibitors in the adipokine-stimulated human primary chondrocytes and ATDC5 murine chondrocyte cell line. Results Herein, we demonstrate, for the first time, that leptin and adiponectin increase VCAM-1 expression in human and murine chondrocytes. In addition, both adipokines have additive effect with IL-1β. Finally, we demonstrate that several kinases, including JAK2, PI3K and AMPK are at a play in the intracellular signalling of VCAM-1 induction. Conclusions Taken together, our results suggest that leptin and adiponectin could perpetuate cartilage-degrading processes by inducing also factors responsible of leukocyte and monocyte infiltration at inflamed joints.
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Ruscica M, Steffani L, Magni P. Adiponectin interactions in bone and cartilage biology and disease. VITAMINS AND HORMONES 2012; 90:321-39. [PMID: 23017721 DOI: 10.1016/b978-0-12-398313-8.00012-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The adipokine adiponectin promotes insulin sensitivity and fat β-oxidation. In addition to its metabolic effects, adiponectin is an important local and systemic modulator of bone remodeling and cartilage biology, involving direct and indirect mechanisms and a large set of downstream molecular signals. Moreover, data suggest that changes in adiponectin signaling may be associated with bone and cartilage diseases. Adiponectin seems to exert a negative net effect on bone mass and to be an independent predictor of lower bone mass, whereas available data about actions on cartilage are more controversial, showing both pro- and anti-inflammatory actions. Adiponectin-bone cross talk seems to be reciprocal, as osteocalcin, produced by osteoblasts, has been shown to stimulate adiponectin expression and to improve glucose tolerance. Adiponectin-related signaling in bone and cartilage should be considered within the network of hormonal and nutritional signals that may influence skeleton biology, together with body homeostasis and adipose mass changes.
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Affiliation(s)
- Massimiliano Ruscica
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
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