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Kong H, Han JJ, Dmitrii G, Zhang XA. Phytochemicals against Osteoarthritis by Inhibiting Apoptosis. Molecules 2024; 29:1487. [PMID: 38611766 PMCID: PMC11013217 DOI: 10.3390/molecules29071487] [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: 02/27/2024] [Revised: 03/24/2024] [Accepted: 03/25/2024] [Indexed: 04/14/2024] Open
Abstract
Osteoarthritis (OA) is a chronic joint disease that causes pathological changes in articular cartilage, synovial membrane, or subchondral bone. Conventional treatments for OA include surgical and non-surgical methods. Surgical treatment is suitable for patients in the terminal stage of OA. It is often the last choice because of the associated risks and high cost. Medication of OA mainly includes non-steroidal anti-inflammatory drugs, analgesics, hyaluronic acid, and cortico-steroid anti-inflammatory drugs. However, these drugs often have severe side effects and cannot meet the needs of patients. Therefore, safe and clinically appropriate long-term treatments for OA are urgently needed. Apoptosis is programmed cell death, which is a kind of physiologic cell suicide determined by heredity and conserved by evolution. Inhibition of apoptosis-related pathways has been found to prevent and treat a variety of diseases. Excessive apoptosis can destroy cartilage homeostasis and aggravate the pathological process of OA. Therefore, inhibition of apoptosis-related factors or signaling pathways has become an effective means to treat OA. Phytochemicals are active ingredients from plants, and it has been found that phytochemicals can play an important role in the prevention and treatment of OA by inhibiting apoptosis. We summarize preclinical and clinical studies of phytochemicals for the treatment of OA by inhibiting apoptosis. The results show that phytochemicals can treat OA by targeting apoptosis-related pathways. On the basis of improving some phytochemicals with low bioavailability, poor water solubility, and high toxicity by nanotechnology-based drug delivery systems, and at the same time undergoing strict clinical and pharmacological tests, phytochemicals can be used as a potential therapeutic drug for OA and may be applied in clinical settings.
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Affiliation(s)
- Hui Kong
- College of Exercise and Health, Shenyang Sport University, Shenyang 110102, China; (H.K.); (J.-J.H.)
| | - Juan-Juan Han
- College of Exercise and Health, Shenyang Sport University, Shenyang 110102, China; (H.K.); (J.-J.H.)
| | - Gorbachev Dmitrii
- General Hygiene Department, Samara State Medical University, Samara 443000, Russia;
| | - Xin-an Zhang
- College of Exercise and Health, Shenyang Sport University, Shenyang 110102, China; (H.K.); (J.-J.H.)
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Brochard S, Pontin J, Bernay B, Boumediene K, Conrozier T, Baugé C. The benefit of combining curcumin, bromelain and harpagophytum to reduce inflammation in osteoarthritic synovial cells. BMC Complement Med Ther 2021; 21:261. [PMID: 34649531 PMCID: PMC8515758 DOI: 10.1186/s12906-021-03435-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 09/27/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Osteoarthritis (OA) is the most common form of arthritis, affecting millions of people worldwide and characterised by joint pain and inflammation. It is a complex disease involving inflammatory factors and affecting the whole joint, including the synovial membrane. Since drug combination is widely used to treat chronic inflammatory diseases, a similar strategy of designing plant-derived natural products to reduce inflammation in OA joints may be of interest. In this study, we characterised the response of OA synovial cells to lipopolysaccharide (LPS) and investigated the biological action of the combination of curcumin, bromelain and harpagophytum in this original in vitro model of osteoarthritis. METHODS Firstly, human synovial cells from OA patients were stimulated with LPS and proteomic analysis was performed. Bioinformatics analyses were performed using Cytoscape App and SkeletalVis databases. Additionally, cells were treated with curcumin, bromelain and harpagophytum alone or with the three vegetal compounds together. The gene expression involved in inflammation, pain or catabolism was determined by RT-PCR. The release of the encoded proteins by these genes and of prostaglandin E2 (PGE2) were also assayed by ELISA. RESULTS Proteomic analysis demonstrated that LPS induces the expression of numerous proteins involved in the OA process in human OA synovial cells. In particular, it stimulates inflammation through the production of pro-inflammatory cytokines (Interleukin-6, IL-6), catabolism through an increase of metalloproteases (MMP-1, MMP-3, MMP-13), and the production of pain-mediating neurotrophins (Nerve Growth Factor, NGF). These increases were observed in terms of mRNA levels and protein release. LPS also increases the amount of PGE2, another inflammation and pain mediator. At the doses tested, vegetal extracts had little effect: only curcumin slightly counteracted the effects of LPS on NGF and MMP-13 mRNA, and PGE2, IL-6 and MMP-13 release. In contrast, the combination of curcumin with bromelain and harpagophytum reversed lots of effects of LPS in human OA synovial cells. It significantly reduced the gene expression and/or the release of proteins involved in catabolism (MMP-3 and -13), inflammation (IL-6) and pain (PGE2 and NGF). CONCLUSION We have shown that the stimulation of human OA synovial cells with LPS can induce protein changes similar to inflamed OA synovial tissues. In addition, using this model, we demonstrated that the combination of three vegetal compounds, namely curcumin, bromelain and harpagophytum, have anti-inflammatory and anti-catabolic effects in synovial cells and may thus reduce OA progression and related pain.
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Affiliation(s)
- Sybille Brochard
- EA7451 BioConnect, Université de Caen Normandie, UNICAEN, 14032, Caen, France
| | - Julien Pontin
- Proteogen platform, Normandie Univ, UNICAEN, Caen, France
| | - Benoit Bernay
- Proteogen platform, Normandie Univ, UNICAEN, Caen, France
| | - Karim Boumediene
- EA7451 BioConnect, Université de Caen Normandie, UNICAEN, 14032, Caen, France
| | - Thierry Conrozier
- Rheumatology Department, Nord Franche-Comté Hospital, Trevenans, France
| | - Catherine Baugé
- EA7451 BioConnect, Université de Caen Normandie, UNICAEN, 14032, Caen, France.
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Wang P, Ye Y, Yuan W, Tan Y, Zhang S, Meng Q. Curcumin exerts a protective effect on murine knee chondrocytes treated with IL-1β through blocking the NF-κB/HIF-2α signaling pathway. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:940. [PMID: 34350255 PMCID: PMC8263872 DOI: 10.21037/atm-21-2701] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 06/09/2021] [Indexed: 11/16/2022]
Abstract
Background Osteoarthritis (OA) is characterized by erosion and degradation of articular cartilage. This study assessed the effects of curcumin on mouse knee cartilage chondrocytes. Methods Chondrocytes were treated for 24 hours with interleukin IL-1β (10 ng/mL) alone, or the combination of curcumin (10, 20, and 50 µM) and IL-1β. The proliferation, viability, and cytotoxicity of the chondrocytes were evaluated by the MTS assay. Expression of SOX9, AGG, Col2α, MMP9, ADAMTS5, COX2, iNOS, pIκB-α, pNF-κB, and hypoxia-inducible factor-2α (HIF-2α) were detected by western blotting or quantitative polymerase chain reaction (q-PCR). Nuclear translocation of NF-κB and HIF-2α were investigated by immunofluorescence and immunohistochemistry. In in vivo experiments, mice were subjected to destabilization of the medial meniscus (DMM) and given curcumin orally for 6 weeks. Cartilage integrity was evaluated by OARSI (Osteoarthritic Research Society International) scores. Results Curcumin significantly inhibited the IL-1β-induced reduction of cell viability, degradation of ECM, and the expression of SOX9, Col2α, and AGG (P<0.01). Western blotting, immunofluorescence and immunohistochemistry experiments demonstrated that curcumin dramatically inhibited the activation of NF-κB/HIF-2α in chondrocytes treated with IL-1β (P<0.01). The articular scores were significantly lower in the DMM-induced OA mice compared to OA mice treated with curcumin (P<0.01). Conclusions Curcumin may have the potential to inhibit OA development, partly through suppressing the activation of the NF-κB/HIF-2α pathway.
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Affiliation(s)
- Pengzhen Wang
- Guangzhou Institute of Traumatic Surgery, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
| | - Yanchen Ye
- Division of Vascular Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,National-Guangdong Joint Engineering Laboratory for Diagnosis and Treatment of Vascular Diseases, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Wei Yuan
- Department of General Surgery, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
| | - Yanping Tan
- Department of Neurology, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
| | - Shaoheng Zhang
- Department of Cardiology, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
| | - Qingqi Meng
- Guangzhou Institute of Traumatic Surgery, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
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Pérez-Lozano ML, Cesaro A, Mazor M, Esteve E, Berteina-Raboin S, Best TM, Lespessailles E, Toumi H. Emerging Natural-Product-Based Treatments for the Management of Osteoarthritis. Antioxidants (Basel) 2021; 10:265. [PMID: 33572126 PMCID: PMC7914872 DOI: 10.3390/antiox10020265] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 02/01/2021] [Accepted: 02/04/2021] [Indexed: 01/10/2023] Open
Abstract
Osteoarthritis (OA) is a complex degenerative disease in which joint homeostasis is disrupted, leading to synovial inflammation, cartilage degradation, subchondral bone remodeling, and resulting in pain and joint disability. Yet, the development of new treatment strategies to restore the equilibrium of the osteoarthritic joint remains a challenge. Numerous studies have revealed that dietary components and/or natural products have anti-inflammatory, antioxidant, anti-bone-resorption, and anabolic potential and have received much attention toward the development of new therapeutic strategies for OA treatment. In the present review, we provide an overview of current and emerging natural-product-based research treatments for OA management by drawing attention to experimental, pre-clinical, and clinical models. Herein, we review current and emerging natural-product-based research treatments for OA management.
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Affiliation(s)
- Maria-Luisa Pérez-Lozano
- Laboratory I3MTO, EA 4708, Université d’Orléans, CEDEX 2, 45067 Orléans, France; (M.-L.P.-L.); (A.C.); (E.L.)
- Plateforme Recherche Innovation Médicale Mutualisée d’Orléans, Centre Hospitalier Régional d’Orléans, 14 Avenue de l’Hôpital, 45100 Orléans, France
| | - Annabelle Cesaro
- Laboratory I3MTO, EA 4708, Université d’Orléans, CEDEX 2, 45067 Orléans, France; (M.-L.P.-L.); (A.C.); (E.L.)
- Plateforme Recherche Innovation Médicale Mutualisée d’Orléans, Centre Hospitalier Régional d’Orléans, 14 Avenue de l’Hôpital, 45100 Orléans, France
| | - Marija Mazor
- Center for Proteomics, Department for Histology and Embryology, Faculty of Medicine, University of Rijeka, B. Branchetta 20, 51000 Rijeka, Croatia;
| | - Eric Esteve
- Service de Dermatologie, Centre Hospitalier Régional d′Orléans, 14 Avenue de l’Hôpital, 45100 Orléans, France;
| | - Sabine Berteina-Raboin
- Institut de Chimie Organique et Analytique ICOA, Université d’Orléans-Pôle de Chimie, UMR CNRS 7311, Rue de Chartres-BP 6759, CEDEX 2, 45067 Orléans, France;
| | - Thomas M. Best
- Department of Orthopedics, Division of Sports Medicine, Health Sports Medicine Institute, University of Miami, Coral Gables, FL 33146, USA;
| | - Eric Lespessailles
- Laboratory I3MTO, EA 4708, Université d’Orléans, CEDEX 2, 45067 Orléans, France; (M.-L.P.-L.); (A.C.); (E.L.)
- Plateforme Recherche Innovation Médicale Mutualisée d’Orléans, Centre Hospitalier Régional d’Orléans, 14 Avenue de l’Hôpital, 45100 Orléans, France
- Centre Hospitalier Régional d’Orléans, Institut Département de Rhumatologie, 45067 Orléans, France
| | - Hechmi Toumi
- Laboratory I3MTO, EA 4708, Université d’Orléans, CEDEX 2, 45067 Orléans, France; (M.-L.P.-L.); (A.C.); (E.L.)
- Plateforme Recherche Innovation Médicale Mutualisée d’Orléans, Centre Hospitalier Régional d’Orléans, 14 Avenue de l’Hôpital, 45100 Orléans, France
- Centre Hospitalier Régional d’Orléans, Institut Département de Rhumatologie, 45067 Orléans, France
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Zhou Y, Ming J, Deng M, Li Y, Li B, Li J, Ma Y, Chen Z, Wang G, Liu S. Chemically modified curcumin (CMC2.24) alleviates osteoarthritis progression by restoring cartilage homeostasis and inhibiting chondrocyte apoptosis via the NF-κB/HIF-2α axis. J Mol Med (Berl) 2020; 98:1479-1491. [PMID: 32860098 PMCID: PMC10375240 DOI: 10.1007/s00109-020-01972-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 05/31/2020] [Accepted: 08/25/2020] [Indexed: 12/11/2022]
Abstract
The disorders of cartilage homeostasis and chondrocyte apoptosis are major events in the pathogenesis of osteoarthritis (OA). Herein, we aim to assess the chondroprotective effect and underlying mechanisms of a novel chemically modified curcumin, CMC2.24, in modulating extracellular matrix (ECM) homeostasis and inhibiting chondrocyte apoptosis. Rats underwent the anterior cruciate ligament transection, and medial menisci resection was treated by intra-articular injection with CMC2.24. In an in vitro study, rat chondrocytes were pretreated with CMC2.24 before stimulation with sodium nitroprusside (SNP). Results from in vivo studies demonstrated that the intra-articular administration of CMC2.24 ameliorated osteoarthritic cartilage destruction by promoting collagen 2a1 production and inhibited cartilage degradation and apoptosis by suppressing hypoxia-inducible factor-2a (Hif-2α), matrix metalloproteinase-3, runt-related transcription factor 2, cleaved caspase-3, and vascular endothelial growth factor and the phosphorylation of IκBα and NF-κB p65. The in vitro results revealed that CMC2.24 exhibited a strong inhibitory effect on SNP-induced chondrocyte catabolism and apoptosis. The SNP-enhanced expression of Hif-2α, a catabolic and apoptotic factor, decreased in a dose-dependent manner after CMC2.24 treatment. CMC2.24 pretreatment effectively inhibited SNP-induced IκBα and NF-κB p65 phosphorylation in rat chondrocytes, whereas pretreatment with the NF-κB antagonist BMS-345541 significantly enhanced the effects of CMC2.24. Overall, these results demonstrated that CMC2.24 attenuates OA progression by modulating ECM homeostasis and chondrocyte apoptosis by suppressing the NF-κB/Hif-2α axis, thus providing a new perspective for therapeutic strategies in OA. KEY MESSAGES: • Intra-articular injection of CMC2.24 ameliorated osteoarthritic cartilage destruction. • CMC2.24 promoted cell viability and decreased SNP-induced apoptotic gene expression. • SNP-induced activation of Hif-2α is inhibited by CMC2.24. • CMC2.24 inhibits NF-κB/Hif-2α axis activation to modulate ECM homeostasis and inhibit chondrocyte apoptosis.
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Nicoliche T, Maldonado DC, Faber J, da Silva MCP. Evaluation of the articular cartilage in the knees of rats with induced arthritis treated with curcumin. PLoS One 2020; 15:e0230228. [PMID: 32163510 PMCID: PMC7067390 DOI: 10.1371/journal.pone.0230228] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Accepted: 02/18/2020] [Indexed: 12/29/2022] Open
Abstract
This study was designed to evaluate the anti-inflammatory effects of a curcumin treatment on the knee of rats with induced osteoarthritis. Fifteen adult rats were used and divided in three groups: the osteoarthritis group (OAG), control group (CG-without induction of osteoarthritis), and curcumin-treated osteoarthritis group (COAG). Osteoarthritis was induced in the right knee of rats in the OAG and COAG by administering an intra-articular injection of 1 mg of zymosan. Fourteen days after induction, 50 mg/kg curcumin was administered by gavage daily for 60 days to the COAG. After the treatment period, rats from all groups were euthanized. Medial femoral condyles were collected for light microscopy and immunohistochemical staining. The expression of SOX-5, IHH, MMP-8, MMP-13, and collagen 2 (Col2) was analyzed. The COAG exhibited an increase in the number of chondrocytes in the surface and middle layers compared with that of the OAG and CG, respectively. The COAG also showed a decrease in the thicknesses of the middle and deep layers compared with those of the OAG, and an increase in Col2 expression was observed in all articular layers (surface, middle, and deep) in the COAG compared with that in the OAG. SOX-5 expression was increased in the surface and deep layers of the COAG compared with those in the OAG and CG. Based on the results of this study, the curcumin treatment appeared to exert a protective effect on cartilage, as it did not result in an increase in cartilage thickness or in MMP-8 and MMP-13 expression but led to increased IHH, Col2, and SOX-5 expression and the number of chondrocytes.
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Affiliation(s)
- Tiago Nicoliche
- Department of Morphology and Genetics, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Diogo Correa Maldonado
- Department of Morphology and Genetics, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Jean Faber
- Department of Neurology and Neurosurgery, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
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He B, Wu F, Li X, Liu Y, Fan L, Li H. Mitochondrial dependent pathway is involved in the protective effects of carboxymethylated chitosan on nitric oxide-induced apoptosis in chondrocytes. BMC Complement Med Ther 2020; 20:23. [PMID: 32020892 PMCID: PMC7076817 DOI: 10.1186/s12906-019-2808-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 12/23/2019] [Indexed: 12/26/2022] Open
Abstract
Background Chondrocyte apoptosis activated by the mitochondrial dependent pathway serves a crucial role in cartilage degeneration of osteoarthritis (OA). In the present study, the protective effects of CMCS against sodium nitroprusside (SNP)-induced chondrocyte apoptosis were evaluated and the underlying molecular mechanisms were elucidated. Methods Chondrocytes were isolated from articular cartilage of SD rats and identified by type II collagen immunohistochemistry. The chondrocytes stimulated with or without SNP to induce apoptosis, were treated by CMCS for various concentrations. The cell viability were determined by MTT and LDH assays. Cell apoptotic ratio was determined by Annexin V-FITC/PI staining. Mitochondrial membrane potential (ΔΨm) was detected by using Rhodamine123 (Rho123) staining. To understand the mechanism, the mRNA expression levels of Bcl-2, Bax, cytochrome c (Cyt c) and cleaved caspase-3 were detected by real-time PCR and western blot analysis, respectively. Results It was shown using the MTT and LDH assays that CMCS protected the viability of chondrocyte against SNP damage. Annexin V-FITC/PI and Rho123 staining showed that CMCS not only inhibited the cell apoptosis but also restored the reduction of the ΔΨm in chondrocytes. In SNP-induced chondrocytes, CMCS down-regulated the expression of Bax, Cyt c and cleaved caspase-3 but upregulated the expression of Bcl-2, as shown by real-time PCR and western blot. Conclusions Taken together, these results indicated that CMCS has the protective effect on chondrocytes against SNP-induced apoptosis, at least partly, via inhibiting the mitochondrial dependent apoptotic pathway. Thus, CMCS may be potentially used as a biological agent for prevention and treatment of OA.
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Affiliation(s)
- Bin He
- Department of Orthopaedics, Renmin Hospital of Wuhan University, 238# Jiefang Road, Wuchang District, Wuhan, Hubei, 430060, People's Republic of China.
| | - Fei Wu
- Department of Orthopaedics, Renmin Hospital of Wuhan University, 238# Jiefang Road, Wuchang District, Wuhan, Hubei, 430060, People's Republic of China
| | - Xiaohai Li
- Department of Orthopaedics, Renmin Hospital of Wuhan University, 238# Jiefang Road, Wuchang District, Wuhan, Hubei, 430060, People's Republic of China
| | - Yang Liu
- Department of Orthopaedics, Renmin Hospital of Wuhan University, 238# Jiefang Road, Wuchang District, Wuhan, Hubei, 430060, People's Republic of China
| | - Li Fan
- Department of Orthopaedics, Renmin Hospital of Wuhan University, 238# Jiefang Road, Wuchang District, Wuhan, Hubei, 430060, People's Republic of China
| | - Haohuan Li
- Department of Orthopaedics, Renmin Hospital of Wuhan University, 238# Jiefang Road, Wuchang District, Wuhan, Hubei, 430060, People's Republic of China
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Restoration of Autophagic Flux Rescues Oxidative Damage and Mitochondrial Dysfunction to Protect against Intervertebral Disc Degeneration. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:7810320. [PMID: 31976028 PMCID: PMC6954474 DOI: 10.1155/2019/7810320] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 09/07/2019] [Accepted: 11/26/2019] [Indexed: 12/11/2022]
Abstract
Oxidative stress-induced mitochondrial dysfunction and nucleus pulposus (NP) cell apoptosis play crucial roles in the development of intervertebral disc degeneration (IDD). Increasing studies have shown that interventions targeting impaired autophagic flux can maintain cellular homeostasis by relieving oxidative damage. Here, we investigated the effect of curcumin (CUR), a known autophagy activator, on IDD in vitro and in vivo. CUR suppressed tert-butyl hydroperoxide- (TBHP-) induced oxidative stress and mitochondrial dysfunction and thereby inhibited human NP cell apoptosis, senescence, and ECM degradation. CUR treatment induced autophagy and enhanced autophagic flux in an AMPK/mTOR/ULK1-dependent manner. Notably, CUR alleviated TBHP-induced interruption of autophagosome-lysosome fusion and impairment of lysosomal function and thus contributed to the restoration of blocked autophagic clearance. These protective effects of CUR in TBHP-stimulated human NP cells resembled the effects produced by the autophagy inducer rapamycin, but the effects were partially eliminated by 3-methyladenine- and compound C-mediated inhibition of autophagy initiation or chloroquine-mediated obstruction of autophagic flux. Lastly, CUR also exerted a protective effect against puncture-induced IDD progression in vivo. Our results showed that suppression of excessive ROS production and mitochondrial dysfunction through enhancement of autophagy coupled with restoration of autophagic flux ameliorated TBHP-induced human NP cell apoptosis, senescence, and ECM degradation. Thus, maintenance of the proper functioning of autophagy represents a promising therapeutic strategy for IDD, and CUR might serve as an effective therapeutic agent for IDD.
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Protective effects of Platycodon grandiflorus polysaccharides against apoptosis induced by carbonyl cyanide 3-chlorophenylhydrazone in 3D4/21 cells. Int J Biol Macromol 2019; 141:1220-1227. [PMID: 31521659 DOI: 10.1016/j.ijbiomac.2019.09.086] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 09/04/2019] [Accepted: 09/11/2019] [Indexed: 12/21/2022]
Abstract
This study aimed to investigate the potential protective effects of Platycodon grandiflorus polysaccharide (PGPS) on carbonyl cyanide 3-chlorophenylhydrazone (CCCP)-induced mitochondrial apoptosis in 3D4/21 cells. Apoptosis-related indicators such as cell viability, apoptosis rate, mitochondrial membrane potential (MMP), and apoptosis-related protein were examined. Results indicated that PGPSt can inhibit CCCP-induced cell damage, with cell-survival rate reaching 81% and apoptotic rate decreasing to 23%. Nuclear deformation was also significantly reduced in the PGPSt group, and changes in MMP were inhibited by PGPSt. Further analyses showed that the protein expression of Caspase-9 and Bcl-2 increased and the expression of cleaved Caspase-3 decreased, indicating that PGPSt significantly inhibited the CCCP-induced change in apoptotic protein expression. All these results suggested that PGPSt can antagonize 3D4/21 cell apoptosis by restoring MMP, protecting the integrity of nuclear morphology, and increasing Bcl-2 expression.
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Pearson W, Kott LS. A biological extract of turmeric (Curcuma longa) modulates response of cartilage explants to lipopolysaccharide. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 19:252. [PMID: 31506082 PMCID: PMC6737590 DOI: 10.1186/s12906-019-2660-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 08/28/2019] [Indexed: 12/11/2022]
Abstract
Background Turmeric is commonly used as a dietary treatment for inflammation, but few studies have evaluated the direct effect of turmeric on cartilage. The purpose of this study was to characterize cartilage explants’ inflammatory responses to lipopolysaccharide in the presence of a simulated biological extract of turmeric. Methods Turmeric was incubated in simulated gastric and intestinal fluid, followed by inclusion of liver microsomes and NADPH. The resulting extract (TURsim) was used to condition cartilage explants in the presence or absence of lipopolysaccharide. Explants were cultured for 96 h (h); the first 24 h in basal tissue culture media and the remaining 72 h in basal tissue culture media containing TURsim (0, 3, 9 or 15 μg/mL). Lipopolysaccharide (0 or 5 μg/mL) was added for the final 48 H. media samples were collected immediately prior to lipopolysaccharide exposure (0 h) and then at 24 and 48 h after, and analyzed for prostaglandin E2 (PGE2), glycosaminoglycan (GAG), and nitric oxide (NO). Explants were stained with calcein-AM for an estimate of live cells. Data were analyzed using a 2-way repeated measures (GAG, PGE2, NO) or 1-way ANOVA without repeated measures (viability). Significance accepted at p < 0.05. Results TURsim significantly reduced PGE2, NO and GAG, and calcein fluorescence was reduced. Conclusions: These data contribute to the growing body of evidence for the utility of turmeric as an intervention for cartilage inflammation.
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Yan D, He B, Guo J, Li S, Wang J. Involvement of TLR4 in the protective effect of intra-articular administration of curcumin on rat experimental osteoarthritis. Acta Cir Bras 2019; 34:e201900604. [PMID: 31432995 PMCID: PMC6705335 DOI: 10.1590/s0102-865020190060000004] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 05/21/2019] [Indexed: 12/25/2022] Open
Abstract
PURPOSE In view of the principal role of Toll-like receptor 4 (TLR4) in mediating sterile inflammatory response contributing to osteoarthritis (OA) pathogenesis, we used lipopolysaccharide (LPS), a known TLR4 activator, to clarify whether modulation of TLR4 contributed to the protective actions of intra-articular administration of curcumin in a classical rat OA model surgically induced by anterior cruciate ligament transection (ACLT). METHODS The rats underwent ACLT and received 50μl of curcumin at the concentration of 1 mg mL-1 and 10 μg LPS by intra-articular injection once a week for 8 weeks. Morphological changes of the cartilage and synovial tissues were observed. Apoptotic chondrocytes were detected using TUNEL assay. The concentrations of IL-1β and TNF-ɑ in synovial fluid were determined using ELISA kits. The mRNA and protein expression levels of TLR4 and NF-κB p65 were detected by real-time PCR and Western blotting, respectively. RESULTS Intra-articular administration of curcumin significantly improved articular cartilage injury, suppressed synovial inflammation and down-regulated the overexpression of TLR4 and its downstream NF-κB caused by LPS-induced TLR4 activation in rat osteoarthritic knees. CONCLUSION The data suggested that the inhibition of TLR4 signal might be an important mechanism underlying a protective effect of local curcumin administration on OA.
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Affiliation(s)
- Dan Yan
- Associate Professor, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, China. Conception and design of the study, acquisition and interpretation of data
| | - Bingshu He
- MS, Department of Orthopedics, Hubei Provincial Women and Children's Hospital, China. Conception and design of the study, acquisition and interpretation of data
| | - Jie Guo
- MS, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, China. Acquisition of data, critical revision
| | - Shulan Li
- MS, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, China. Acquisition of data
| | - Jun Wang
- Associate Professor, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, China. Design of the study, manuscript writing, critical revision, supervised all phases of the study
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D’Ascola A, Irrera N, Ettari R, Bitto A, Pallio G, Mannino F, Atteritano M, Campo GM, Minutoli L, Arcoraci V, Squadrito V, Picciolo G, Squadrito F, Altavilla D. Exploiting Curcumin Synergy With Natural Products Using Quantitative Analysis of Dose-Effect Relationships in an Experimental In Vitro Model of Osteoarthritis. Front Pharmacol 2019; 10:1347. [PMID: 31798452 PMCID: PMC6868087 DOI: 10.3389/fphar.2019.01347] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 10/24/2019] [Indexed: 02/05/2023] Open
Abstract
Introduction: Drug combination is widely used to treat chronic inflammatory diseases. A similar strategy might be worth of interest to design plant-derived natural products to treat inflammatory conditions. Curcumin is a natural phenolic compound which shares anti-inflammatory activity with both flavocoxid, a flavonoid mixture of baicalin and catechin, and β-caryophyllene, a bicyclic sesquiterpene. The aim of this study was to investigate the synergy potential of curcumin with both flavocoxid and β-caryophyllene in human articular chondrocytes triggered with lipopolysaccharide (LPS), in an experimental in vitro model of osteoarthritis. Materials and Methods: Human articular chondrocytes were stimulated with LPS alone or in combination with different treatments. Total RNA was extracted 4 h after treatment to study interleukin 1β (IL-1β), NF-κB, and STAT3 mRNA expression. A drug combination study was designed choosing 5 doses to demonstrate a synergistic effect of compounds, according to Chou and Talalay method. A median-effect equation was applied and finally, the combination index (CI) was used to clarify the nature of the compounds interaction (synergistic versus additive versus antagonistic inhibitory effects); CI < 1, CI = 1, and CI > 1 indicated synergistic, additive, and antagonistic effects, respectively. Results: LPS prompted IL-1β expression. Curcumin, flavocoxid and β-caryophyllene suppressed IL-1β expression with different IC50. A synergistic action for the reduction of the inflammatory phenotype in human chondrocytes was observed for the combination curcumin-flavocoxid with a percentage from 10% to 90%, and for the combination curcumin-β-caryophyllene from 50% to 90%. IC50 doses of either flavocoxid, β-caryophyllene and curcumin alone or in combination were safe and did not affect cell vitality. Moreover, the same IC50 doses reduced the transcription factors NF-κB and STAT3 mRNA expression and interestingly the effects of the combinations were greater than the natural products alone, thus suggesting that the site where the synergy takes place could be at the signal transduction level. Discussion: The results suggest that curcumin synergizes with either flavocoxid or β-caryophyllene, exerting an anti-inflammatory activity and thus strongly suggesting the potential of a dual combination of these compounds for the management of osteoarthritis and unmasking a new feature of these natural products.
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Affiliation(s)
- Angela D’Ascola
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Natasha Irrera
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Roberta Ettari
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy
| | - Alessandra Bitto
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Giovanni Pallio
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Federica Mannino
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Marco Atteritano
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Giuseppe M. Campo
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Letteria Minutoli
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Vincenzo Arcoraci
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Violetta Squadrito
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Giacomo Picciolo
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Francesco Squadrito
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
- *Correspondence: Francesco Squadrito,
| | - Domenica Altavilla
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Messina, Italy
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