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Hakimelahi A, Sharifi R, Mahmoodi M, Kassaee SM. The effect of opine on matrix metalloproteinase expression in mice with breast cancer. Arch Physiol Biochem 2022; 128:501-506. [PMID: 31814478 DOI: 10.1080/13813455.2019.1696367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Regarding the anti-inflammatory and anti-tumour effects of arginine and its derivatives, this study evaluates matrix metalloproteinase (MMPs) expression in an animal model of breast cancer following administration of octopine. In this study, 40 animals of Balb/C mice were divided into 5 groups: the healthy control, the cancer control, the cancer group receiving 50 mg of octopine, the cancer group receiving 100 mg of octopine and the cancer group receiving 150 mg of octopine for 3 weeks. 4T1 cell line was used to induce cancer. Biopsy specimens were enrolled from mice and MMP-1, MMP-3 and MMP-9 gene expression evaluated using real-time PCR, while these protein amounts were measured using immunohistochemistry and ELISA methods. Data were analysed using one-way ANOVA, Kruskal-Wallis and Mann-Whitney U tests (p < .05). The results showed that 100 mg octopine consumption had significant decreasing effect on MMP-9 expression (p = .02) in the treatment group compared with cancerous non-treated mice. Furthermore, results from immunohistochemistry and ELISA confirmed this effect, the protein amount of MMP-9 was significantly decreased in group treating with 100 mg octopine (.005). The use of octopine has a beneficial effect on reducing MMP-9 in mice breast cancer.
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Affiliation(s)
| | - Rasoul Sharifi
- Department of Biology, Faculty of Basic Sciences, Islamic Azad University, Ahar, Iran
| | - Minoo Mahmoodi
- Department of Biology, Hamedan Branch, Islamic Azad University, Hamedan, Iran
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Takeuchi K, Ogawa H, Kuramitsu N, Akaike K, Goto A, Aoki H, Lassar A, Suehara Y, Hara A, Matsumoto K, Akiyama H. Colchicine protects against cartilage degeneration by inhibiting MMP13 expression via PLC-γ1 phosphorylation. Osteoarthritis Cartilage 2021; 29:1564-1574. [PMID: 34425229 PMCID: PMC8542595 DOI: 10.1016/j.joca.2021.08.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 07/17/2021] [Accepted: 08/10/2021] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Low molecular weight compounds that reduce the expression of MMP13 at the mRNA level might serve as disease-modifying osteoarthritis (OA) drugs (DMOADs). The objective of this study was to identify a candidate DMOAD that targets MMP13 expression. DESIGN High-throughput screening was performed to identify compounds that suppress inflammatory cytokine-induced MMP13 expression. Ingenuity pathway analysis (IPA) using isobaric tags for relative and absolute quantification (iTRAQ)-based proteomic analysis was conducted to identify signaling pathways related to cytokines. MMP13 expression in chondrocytes was evaluated through RT-qPCR and western blotting analyses. Additionally, 10-week-old mice were subjected to destabilization of the medial meniscus (DMM) surgery to induce OA and were sacrificed 12 weeks post-surgery for pathological examination. OA was evaluated using the OARSI scoring system. RESULTS Colchicine was identified as a DMOAD candidate as it inhibited inflammatory cytokine-induced MMP13 expression in vitro, and the colchicine-administered mice with DMM presented significantly lower OARSI scores (adjusted P: 0.0242, mean difference: 1.6, 95% confidence interval (CI) of difference: 0.1651-3.035) and significantly lower synovial membrane inflammation scores (adjusted P: 0.0243, mean difference: 0.6, 95% CI of difference: 0.06158-1.138) than mice with DMM. IPA further revealed that components of the Rho signaling pathways are regulated by cytokines and colchicine. IL-1β and TNF-α activate RAC1 and SRC signals, respectively, leading to the phosphorylation of PLC-γ1 and synergistic induction of MMP13 expression. Most notably, colchicine abrogates inflammatory cytokine-induced phosphorylation of PLC-γ1, leading to the induction of MMP13 expression. CONCLUSIONS Colchicine is a potential DMOAD candidate that inhibits MMP13 expression and consequent cartilage degradation by disrupting the SRC/RAC1-phospho-PLCγ1-Ca2+ signaling pathway.
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Affiliation(s)
- K Takeuchi
- Department of Orthopaedic Surgery, Gifu University Graduate School of Medicine, Yanagido 1-1, Gifu, Gifu, 501-1194, Japan
| | - H Ogawa
- Department of Orthopaedic Surgery, Gifu University Graduate School of Medicine, Yanagido 1-1, Gifu, Gifu, 501-1194, Japan; Department of Orthopaedic Surgery, Ogaki Tokushukai Hospital, Hayashi-machi 6-85-1, Ogaki, Gifu, 503-0015, Japan.
| | - N Kuramitsu
- Department of Orthopaedic Surgery, Gifu University Graduate School of Medicine, Yanagido 1-1, Gifu, Gifu, 501-1194, Japan
| | - K Akaike
- Department of Orthopaedic Surgery, Juntendo University School of Medicine, Hongo 2-1-1, Bunkyo-ku, Tokyo, 113-8431, Japan
| | - A Goto
- Department of Orthopaedic Surgery, Gifu University Graduate School of Medicine, Yanagido 1-1, Gifu, Gifu, 501-1194, Japan
| | - H Aoki
- Department of Tissue and Organ Development, Regeneration and Advanced Medical Science, Gifu Graduate School of Medicine, Yanagido 1-1, Gifu, Gifu, 501-1194, Japan
| | - A Lassar
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, 240 Longwood Ave., Boston, MA, 02115, USA
| | - Y Suehara
- Department of Orthopaedic Surgery, Juntendo University School of Medicine, Hongo 2-1-1, Bunkyo-ku, Tokyo, 113-8431, Japan
| | - A Hara
- Department of Tumor Pathology, Gifu University Graduate School of Medicine, Yanagido 1-1, Gifu, Gifu, 501-1194, Japan
| | - K Matsumoto
- Department of Orthopaedic Surgery, Gifu University Graduate School of Medicine, Yanagido 1-1, Gifu, Gifu, 501-1194, Japan
| | - H Akiyama
- Department of Orthopaedic Surgery, Gifu University Graduate School of Medicine, Yanagido 1-1, Gifu, Gifu, 501-1194, Japan
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D'Adamo S, Cetrullo S, Guidotti S, Borzì RM, Flamigni F. Hydroxytyrosol modulates the levels of microRNA-9 and its target sirtuin-1 thereby counteracting oxidative stress-induced chondrocyte death. Osteoarthritis Cartilage 2017; 25:600-610. [PMID: 27914878 DOI: 10.1016/j.joca.2016.11.014] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 10/13/2016] [Accepted: 11/25/2016] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Nutraceutical compounds, such as hydroxytyrosol (HT), have been found to exert protective effects in osteoarthritis (OA) by affecting a variety of key molecular and cellular processes in chondrocytes. However, to our knowledge, no relationship has been reported between nutraceuticals and microRNA (miR) network in OA models. Here, we identified a miR that is implicated in HT-mediated chondroprotection following oxidative stress condition by targeting sirtuin-1 (SIRT-1). METHODS Human primary and C-28/I2 chondrocytes were pre-treated with 100 μM HT 30 min before 100 μM H2O2 addition. In silico analyses were exploited to select putative candidate miRs able to target SIRT-1 mRNA. Luciferase-based gene reporter assay was employed to demonstrate the direct link between miR-9 and its putative mRNA target. Transient transfection approach was performed to examine the effects of miR-9 levels on caspase activity, cell viability and expression of OA-related genes. RESULTS MiR-9 was identified and confirmed as a post-transcriptional regulator of SIRT-1. MiR-9 and SIRT-1 levels showed opposite changes in chondrocytes following H2O2 and HT treatment. Moreover mir-9 silencing inhibited cell death induced by H2O2 partly through down-regulation of SIRT-1, whereas miR-9 overexpression markedly reduced the protective effect of HT. The manipulation of miR-9 levels also resulted in the modulation of OA-related gene expression, including MMP-13, VEGF and RUNX-2. CONCLUSIONS These results show that miR-9 is a critical mediator of the deleterious and OA-related effects of oxidative stress in chondrocytes and that modulation of miR expression may be a crucial mechanism underlying the protective action of HT.
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Affiliation(s)
- S D'Adamo
- Dipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, Bologna, Italy; Dipartimento di Scienze Mediche e Chirurgiche, Università di Bologna, Bologna, Italy
| | - S Cetrullo
- Dipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, Bologna, Italy
| | - S Guidotti
- Dipartimento di Scienze Mediche e Chirurgiche, Università di Bologna, Bologna, Italy; Laboratorio di Immunoreumatologia e Rigenerazione Tissutale, Istituto Ortopedico Rizzoli, Bologna, Italy
| | - R M Borzì
- Laboratorio di Immunoreumatologia e Rigenerazione Tissutale, Istituto Ortopedico Rizzoli, Bologna, Italy
| | - F Flamigni
- Dipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, Bologna, Italy.
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Ma CH, Lv Q, Yu YX, Zhang Y, Kong D, Niu KR, Yi CQ. Protective effects of tumor necrosis factor-α blockade by adalimumab on articular cartilage and subchondral bone in a rat model of osteoarthritis. Braz J Med Biol Res 2015; 48:863-70. [PMID: 26445328 PMCID: PMC4617111 DOI: 10.1590/1414-431x20154407] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Accepted: 03/02/2015] [Indexed: 01/03/2023] Open
Abstract
We aimed to investigate the effects of an anti-tumor necrosis factor-α antibody (ATNF) on cartilage and subchondral bone in a rat model of osteoarthritis. Twenty-four rats were randomly divided into three groups: sham-operated group (n=8); anterior cruciate ligament transection (ACLT)+normal saline (NS) group (n=8); and ACLT+ATNF group (n=8). The rats in the ACLT+ATNF group received subcutaneous injections of ATNF (20 μg/kg) for 12 weeks, while those in the ACLT+NS group received NS at the same dose for 12 weeks. All rats were euthanized at 12 weeks after surgery and specimens from the affected knees were harvested. Hematoxylin and eosin staining, Masson's trichrome staining, and Mankin score assessment were carried out to evaluate the cartilage status and cartilage matrix degradation. Matrix metalloproteinase (MMP)-13 immunohistochemistry was performed to assess the cartilage molecular metabolism. Bone histomorphometry was used to observe the subchondral trabecular microstructure. Compared with the rats in the ACLT+NS group, histological and Mankin score analyses showed that ATNF treatment reduced the severity of the cartilage lesions and led to a lower Mankin score. Immunohistochemical and histomorphometric analyses revealed that ATNF treatment reduced the ACLT-induced destruction of the subchondral trabecular microstructure, and decreased MMP-13 expression. ATNF treatment may delay degradation of the extracellular matrix via a decrease in MMP-13 expression. ATNF treatment probably protects articular cartilage by improving the structure of the subchondral bone and reducing the degradation of the cartilage matrix.
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Affiliation(s)
- C H Ma
- Department of Orthopedic Surgery, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, CN
| | - Q Lv
- Department of Radiology, Tong Ji Hospital, Tong Ji University, Shanghai, CN
| | - Y X Yu
- Department of Orthopedic Surgery, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, CN
| | - Y Zhang
- Department of Orthopedic Surgery, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, CN
| | - D Kong
- Department of Orthopedic Surgery, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, CN
| | - K R Niu
- Department of Orthopedic Surgery, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, CN
| | - C Q Yi
- Department of Orthopedic Surgery, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, CN
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Surse VM, Gupta J, Tikoo K. Esculetin induced changes in Mmp13 and Bmp6 gene expression and histone H3 modifications attenuate development of glomerulosclerosis in diabetic rats. J Mol Endocrinol 2011; 46:245-54. [PMID: 21450970 DOI: 10.1530/jme-10-0154] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Esculetin, an antioxidant, has been used in the treatment of a variety of diseases. This study aimed to investigate the protective effect of esculetin in attenuating streptozotocin (STZ)-induced type I diabetic nephropathy and to understand the molecular mechanism involved in it. Sprague-Dawley rats were rendered diabetic using a single dose of STZ (55 mg/kg, i.p.). Protein expression of PPARγ and transforming growth factor-β1 (TGF-β1) was detected by immunoblotting and immunohistochemistry respectively. RNA expression levels of Mmp13 and Bmp6 were detected by RT-PCR analysis. In diabetic rats, esculetin treatment resulted in a significant decrease in blood glucose, blood urea nitrogen, and plasma creatinine and increase in plasma albumin levels. Esculetin treatment attenuates the downregulation of PPARγ in diabetic kidney, which in turn blocks the TGF-β1-mediated fibronectin expression. In addition, it attenuates the decrease in mono-methylation (K4) and acetylation of histone H3 in diabetic kidney. RT-PCR analysis revealed that esculetin treatment provides protection by decreasing antifibrotic Bmp6 and increasing fibrogenic Mmp13 mRNA expression in diabetic kidney. This is the first report to show that protection observed by esculetin treatment involves alteration in mRNA expression of Mmp13 and Bmp6 genes either directly via altered histone H3 modifications or indirectly by inhibiting the PPARγ/TGF-β1 pathway.
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Affiliation(s)
- Vivek Madhukar Surse
- Laboratory of Chromatin Biology, Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Sector 67, SAS Nagar, Mohali, Punjab 160 062, India
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Boileau C, Martel-Pelletier J, Caron J, Msika P, Guillou GB, Baudouin C, Pelletier JP. Protective effects of total fraction of avocado/soybean unsaponifiables on the structural changes in experimental dog osteoarthritis: inhibition of nitric oxide synthase and matrix metalloproteinase-13. Arthritis Res Ther 2009; 11:R41. [PMID: 19291317 PMCID: PMC2688188 DOI: 10.1186/ar2649] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2008] [Revised: 03/11/2009] [Accepted: 03/16/2009] [Indexed: 11/10/2022] Open
Abstract
INTRODUCTION The aims of this study were, first, to investigate the in vivo effects of treatment with avocado/soybean unsaponifiables on the development of osteoarthritic structural changes in the anterior cruciate ligament dog model and, second, to explore their mode of action. METHODS Osteoarthritis was induced by anterior cruciate ligament transection of the right knee in crossbred dogs. There were two treatment groups (n = 8 dogs/group), in which the animals received either placebo or avocado/soybean unsaponifiables (10 mg/kg per day), which were given orally for the entire duration of the study (8 weeks). We conducted macroscopic and histomorphological analyses of cartilage and subchondral bone of the femoral condyles and/or tibial plateaus. We also conducted immunohistochemical analyses in cartilage for the following antigens: inducible nitric oxide synthase, matrix metalloproteinase (MMP)-1, MMP-13, a disintegrin and metalloproteinase domain with thrombospondin motifs (ADAMTS)4 and ADAMTS5. RESULTS The size of macroscopic lesions on the tibial plateaus was decreased (P = 0.04) in dogs treated with the avocado/soybean unsaponifiables. Histologically, in these animals the severity of cartilage lesions on both tibial plateaus and femoral condyles, and the cellular infiltration in synovium were significantly decreased (P = 0.0002 and P = 0.04, respectively). Treatment with avocado/soybean unsaponifiables also reduced loss of subchondral bone volume (P < 0.05) and calcified cartilage thickness (P = 0.01) compared with placebo. Immunohistochemical analysis of cartilage revealed that avocado/soybean unsaponifiables significantly reduced the level of inducible nitric oxide synthase (P < 0.05) and MMP-13 (P = 0.01) in cartilage. CONCLUSIONS This study demonstrates that treatment with avocado/soybean unsaponifiables can reduce the development of early osteoarthritic cartilage and subchondral bone lesions in the anterior cruciate ligament dog model of osteoarthritis. This effect appears to be mediated through the inhibition of inducible nitric oxide synthase and MMP-13, which are key mediators of the structural changes that take place in osteoarthritis.
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Affiliation(s)
- Christelle Boileau
- Osteoarthritis Research Unit, University of Montreal Hospital Centre (CRCHUM), Notre-Dame Hospital, Sherbrooke Street East, Montreal, Quebec H2L 4M1, Canada
| | - Johanne Martel-Pelletier
- Osteoarthritis Research Unit, University of Montreal Hospital Centre (CRCHUM), Notre-Dame Hospital, Sherbrooke Street East, Montreal, Quebec H2L 4M1, Canada
| | - Judith Caron
- Osteoarthritis Research Unit, University of Montreal Hospital Centre (CRCHUM), Notre-Dame Hospital, Sherbrooke Street East, Montreal, Quebec H2L 4M1, Canada
| | - Philippe Msika
- Laboratoires Expanscience, Avenue de l'Arche, 92419 Courbevoie Cedex, France
| | - Georges B Guillou
- Laboratoires Expanscience, Avenue de l'Arche, 92419 Courbevoie Cedex, France
| | - Caroline Baudouin
- Laboratoires Expanscience, Avenue de l'Arche, 92419 Courbevoie Cedex, France
| | - Jean-Pierre Pelletier
- Osteoarthritis Research Unit, University of Montreal Hospital Centre (CRCHUM), Notre-Dame Hospital, Sherbrooke Street East, Montreal, Quebec H2L 4M1, Canada
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Lee KH, Chen YS, Judson JP, Chakravarthi S, Sim YM, Er HM. The effect of water extracts of Euphorbia hirta on cartilage degeneration in arthritic rats. Malays J Pathol 2008; 30:95-102. [PMID: 19291918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The effect of water extracts of Euphorbia hirta on the histological features and expressions of matrix metalloproteinases (MMPs) and tissue inhibitors of matrix metalloproteinases (TIMPs) in the rat articular cartilage was investigated. Arthritis was induced in rats using Freund's Complete Adjuvant containing heat-killed M. tuberculosis, and treated with water extracts of E. hirta. Paraffin tissue sections of the arthritic joints were evaluated. The extent of cartilage degeneration was found to be greatest in rats treated with the highest dosage of E. hirta, followed by rats in the untreated group. Rats treated with the intermediary and low dosages of Euphorbia hirta showed improved histology. MMP-13 levels were found to be decreased with decreasing dosages of E. hirta. TIMP-1 levels were found to increase with decreasing dosages of E. hirta. MMP-3 levels fluctuated without any appreciable pattern. Low dosages of E. hirta seem to be beneficial in reducing cartilage degeneration in cases of arthritis.
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Affiliation(s)
- Kah Heng Lee
- Human Biology Section, International Medical University, Kuala Lumpur, Malaysia
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Arnoczky SP, Lavagnino M, Egerbacher M, Caballero O, Gardner K. Matrix metalloproteinase inhibitors prevent a decrease in the mechanical properties of stress-deprived tendons: an in vitro experimental study. Am J Sports Med 2007; 35:763-9. [PMID: 17293464 DOI: 10.1177/0363546506296043] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND An increase in matrix metalloproteinases (MMPs) and the resulting degradation of the extracellular matrix have been implicated in the pathogenesis of tendinopathy. Studies have documented the beneficial effects of MMP inhibitors used to treat pathologic conditions in which MMP activity has had a negative effect on connective tissues. HYPOTHESIS Matrix metalloproteinase inhibitors will prevent the decrease in material properties associated with tendon stress deprivation by inhibiting MMP activity. STUDY DESIGN Controlled laboratory study. METHODS Rat tail tendons were subjected to 7 days of in vitro stress deprivation with and without the addition of 1 of 2 broad-spectrum MMP inhibitors (doxycycline and ilomastat). The material properties (ultimate tensile stress, strain, and tensile modulus) of the tendons were compared with each other and with fresh control tendons. In addition, tendons from each group were evaluated for MMP-13 messenger RNA expression, MMP-13 protein synthesis, MMP-13 activity, and pericellular matrix morphology. RESULTS Both MMP inhibitors resulted in a statistically significant reduction in MMP activity in 7 day stress-deprived tendons when compared with nontreated, stress-deprived tendons. Similarly, tendons treated with either ilomastat or doxycycline had significantly improved material properties. MMP-13 messenger RNA expression and protein synthesis were not significantly affected by either MMP inhibitor. Both MMP inhibitors were able to maintain the integrity of the pericellular matrix when compared with nontreated, stress-deprived tendons. CONCLUSION Matrix metalloproteinase inhibitors prevented the activation of MMP-13 and significantly inhibited pericellular matrix degeneration and the loss of material properties associated with stress deprivation. CLINICAL RELEVANCE Matrix metalloproteinase inhibitors may play a supportive role in the treatment of tendinopathy by limiting the MMP-mediated degradation of the extracellular matrix.
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Affiliation(s)
- Steven P Arnoczky
- Laboratory for Comparative Orthopaedic Research, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824, USA.
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Molloy ES, Morgan MP, McDonnell B, O'Byrne J, McCarthy GM. BCP crystals increase prostacyclin production and upregulate the prostacyclin receptor in OA synovial fibroblasts: potential effects on mPGES1 and MMP-13. Osteoarthritis Cartilage 2007; 15:414-20. [PMID: 17123841 DOI: 10.1016/j.joca.2006.10.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2006] [Accepted: 10/04/2006] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To investigate the potential involvement of prostacyclin in basic calcium phosphate (BCP) crystal-induced responses in osteoarthritic synovial fibroblasts (OASF). METHODS OASF grown in culture were stimulated with BCP crystals. Prostacyclin production was measured by enzyme immunoassay. Expression of messenger RNA (mRNA) transcripts was assessed by real-time polymerase chain reaction (PCR). Expression of prostacyclin synthase (PGIS) and the prostacyclin (IP) receptor was measured. The effects of iloprost, a prostacyclin analogue, on expression of genes implicated in osteoarthritis such as microsomal prostaglandin E2 synthase 1 (mPGES1) and matrix metalloproteinases (MMPs) were also studied. FPT inhibitor II, a farnesyl transferase inhibitor, was used to antagonize iloprost-induced responses. RESULTS BCP crystal stimulation led to a five-fold increase in prostacyclin production in OASF compared to untreated cells. This induction was attenuated by cyclooxygenase (COX)-2 and COX-1 inhibition at 4 and 32h, respectively. PGIS and IP receptor transcripts were constitutively expressed in OASF. BCP crystals upregulated IP receptor expression two-fold. While iloprost diminished BCP crystal-stimulated IP receptor upregulation, the inhibitory effect of iloprost was blocked by the farnesyl transferase inhibitor. In addition, iloprost upregulated mPGES1 and downregulated MMP-13 expression in BCP crystal-stimulated OASF, effects that were not influenced by the farnesyl transferase inhibitor. CONCLUSIONS These data showed for the first time that BCP crystals can increase prostacyclin production and upregulate expression of the IP receptor in OASF. The potential of prostacyclin to influence BCP crystal-stimulated responses was supported by the effects of iloprost on the expression of the IP receptor, mPGES1 and MMP-13. These data demonstrate the potential involvement of prostacyclin in BCP crystal-associated osteoarthritis (OA) and suggest that inhibition of PG synthesis with non-steroidal anti-inflammatory drugs may have both deleterious and beneficial effects in BCP crystal-associated OA.
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Affiliation(s)
- E S Molloy
- Department of Molecular and Cellular Therapeutics, Royal College of Surgeons of Ireland, and National Orthopaedic Hospital, Dublin, Ireland.
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Yasuda T, Tchetina E, Ohsawa K, Roughley PJ, Wu W, Mousa A, Ionescu M, Pidoux I, Poole AR. Peptides of type II collagen can induce the cleavage of type II collagen and aggrecan in articular cartilage. Matrix Biol 2006; 25:419-29. [PMID: 16919430 DOI: 10.1016/j.matbio.2006.06.004] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2005] [Revised: 05/31/2006] [Accepted: 06/27/2006] [Indexed: 11/18/2022]
Abstract
The objective of this study was to determine whether a fragment(s) of type II collagen can induce cartilage degradation. Fragments generated by cyanogen bromide (CB) cleavage of purified bovine type II collagen were separated by HPLC. These fragments together with selected overlapping synthetic peptides were first analysed for their capacity to induce cleavage of type II collagen by collagenases in chondrocyte and explant cultures of healthy adult bovine articular cartilage. Collagen cleavage was measured by immunoassay and degradation of proteoglycan (mainly aggrecan) was determined by analysis of cleavage products of core protein by Western blotting. Gene expression of matrix metalloproteinases MMP-13 and MMP-1 was measured using Real-time PCR. Induction of denaturation of type II collagen in situ in cartilage matrix with exposure of the CB domain was identified with a polyclonal and monoclonal antibodies that only react with this domain in denatured but not native type II collagen. As well as the mixture of CB fragments and peptide CB12, a single synthetic peptide CB12-II (residues 195-218), but not synthetic peptide CB12-IV (residues 231-254), potently and consistently induced in explant cultures at 10 microM and 25 microM, in a time, cell and dose dependent manner, collagenase-induced cleavage of type II collagen accompanied by upregulation of MMP-13 expression but not MMP-1. In isolated chondrocyte cultures CB12-II induced very limited upregulation of MMP-13 as well as MMP-1 expression. Although this was accompanied by concomitant induction of cleavage of type II collagen by collagenases, this was not associated by aggrecan cleavage. Peptide CB12-IV, which had no effect on collagen cleavage, clearly induced aggrecanase specific cleavage of the core protein of this proteoglycan. Thus these events involving matrix molecule cleavage can importantly occur independently of each other, contrary to popular belief. Denaturation of type II collagen with exposure of the CB12-II domain was also shown to be much increased in osteoarthritic human cartilage compared to non-arthritic cartilage. These observations reveal that peptides of type II collagen, to which there is increased exposure in osteoarthritic cartilage, can when present in sufficient concentration induce cleavage of type II collagen (CB12-II) and aggrecan (CB12-IV) accompanied by increased expression of collagenases. Such increased concentrations of denatured collagen are present in adult and osteoarthritic cartilages and the exposure of chondrocytes to the sequences they encode, either in soluble or more likely insoluble form, may therefore play a role in the excessive resorption of matrix molecules that is seen in arthritis and development.
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Affiliation(s)
- Tadashi Yasuda
- Shriners Hospitals for Children, Department of Surgery, McGill University, Montreal, Quebec, Canada H3G 1A6
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