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Chang M. Matrix metalloproteinase profiling and their roles in disease. RSC Adv 2023; 13:6304-6316. [PMID: 36825288 PMCID: PMC9942564 DOI: 10.1039/d2ra07005g] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 01/24/2023] [Indexed: 02/25/2023] Open
Abstract
Matrix metalloproteinases (MMPs) play roles in remodelling of the extracellular matrix that occurs during morphogenesis, repair, and angiogenesis. Dysregulation of extracellular matrix remodelling can lead to cell proliferation, invasion, and tissue fibrosis. Identification of a specific MMP(s) in a disease has been challenging due to the presence of 24 closely-related human MMPs, each existing in three forms, of which only one is active and capable of catalysis. This review focuses on methods for MMP profiling, with particular emphasis on the batimastat affinity resin that binds only to the active forms of MMPs and related ADAMs (a disintegrin and metalloproteinases), which are then identified by mass spectrometry. Use of the batimastat affinity resin has identified targets for intervention in several human diseases.
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Affiliation(s)
- Mayland Chang
- Department of Chemistry and Biochemistry, University of Notre Dame Notre Dame IN 46556 USA
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Aleman J, Young CD, Karam SD, Wang XJ. Revisiting laminin and extracellular matrix remodeling in metastatic squamous cell carcinoma: What have we learned after more than four decades of research? Mol Carcinog 2023; 62:5-23. [PMID: 35596706 PMCID: PMC9676410 DOI: 10.1002/mc.23417] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 04/18/2022] [Indexed: 02/06/2023]
Abstract
Patients with squamous cell carcinoma (SCC) have significantly lower survival upon the development of distant metastases. The extracellular matrix (ECM) is a consistent yet dynamic influence on the metastatic capacity of SCCs. The ECM encompasses a milieu of structural proteins, signaling molecules, and enzymes. Just over 40 years ago, the fibrous ECM glycoprotein laminin was identified. Roughly four decades of research have revealed a pivotal role of laminins in metastasis. However, trends in ECM alterations in some cancers have been applied broadly to all metastatic diseases, despite evidence that these characteristics vary by tumor type. We will summarize how laminins influence the SCC metastatic process exclusively. Enhanced laminin protein deposition occurs at the invasive edge of SCC tumors, which correlates with elevated levels of laminin-binding β1 integrins on SCC cells, increased MMP-3 presence, worse prognosis, and lymphatic dissemination. Although these findings are significant, gaps in knowledge of the formation of a premetastatic niche, the processes of intra- and extravasation, and the contributions of the ECM to SCC metastatic cell dormancy persist. Bridging these gaps requires novel in vitro systems and animal models that reproduce tumor-stromal interactions and spontaneous metastasis seen in the clinic. These advances will allow accurate assessment of laminins to predict responders to transforming growth factor-β inhibitors and immunotherapy, as well as potential combinatorial therapies with the standard of care. Such clinical interventions may drastically improve quality of life and patient survival by explicitly targeting SCC metastasis.
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Affiliation(s)
- John Aleman
- Department of Pathology, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA
| | - Christian D. Young
- Department of Pathology, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA
| | - Sana D. Karam
- Department of Radiation Oncology, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA
| | - Xiao-Jing Wang
- Department of Pathology, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA
- Veterans Affairs Medical Center, VA Eastern Colorado Health Care System, Aurora, Colorado, USA
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3
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Hua T, Zeng Z, Chen J, Xue Y, Li Y, Sang Q. Human Malignant Rhabdoid Tumor Antigens as Biomarkers and Potential Therapeutic Targets. Cancers (Basel) 2022; 14:cancers14153685. [PMID: 35954348 PMCID: PMC9367328 DOI: 10.3390/cancers14153685] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/24/2022] [Accepted: 07/26/2022] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Atypical teratoid rhabdoid tumor (ATRT) is a deadly type of human pediatric brain cancer without effective treatments. ATRT is mainly linked to the inactivation of a tumor suppressor gene, SMARCB1; however, additional biomarkers remain to be identified to develop novel therapeutic strategies. Therefore, different tumor antigens and extracellular matrix modulators were investigated in two human ATRT and one kidney malignant rhabdoid tumor cell lines and compared with the nonmalignant HEK293 cell line. Alpha-fetoprotein (AFP), mucin-16 (MUC16 or cancer antigen 125/CA125), osteopontin (OPN), and mesothelin (MSLN) are highly expressed in these human malignant rhabdoid cancer cell lines. Inhibiting MMPs using a small-molecule inhibitor decreased cell survival. This biomarker discovery process may lead to the identification of novel diagnostic and therapeutic strategies, such as the development of targeted and immunotherapies against cancer biomarkers, to treat cancer patients. Abstract Introduction: Atypical teratoid rhabdoid tumor (ATRT) is a lethal type of malignant rhabdoid tumor in the brain, seen mostly in children under two years old. ATRT is mainly linked to the biallelic inactivation of the SMARCB1 gene. To understand the deadly characteristics of ATRT and develop novel diagnostic and immunotherapy strategies for the treatment of ATRT, this study investigated tumor antigens, such as alpha-fetoprotein (AFP), mucin-16 (MUC16/CA125), and osteopontin (OPN), and extracellular matrix modulators, such as matrix metalloproteinases (MMPs), in different human malignant rhabdoid tumor cell lines. In addition, the roles of MMPs were also examined. Materials and methods: Five human cell lines were chosen for this study, including two ATRT cell lines, CHLA-02-ATRT and CHLA-05-ATRT; a kidney malignant rhabdoid tumor cell line, G401; and two control cell lines, human embryonic kidney HEK293 and HEK293T. Both ATRT cell lines were treated with a broad-spectrum MMP inhibitor, GM6001, to investigate the effect of MMPs on cell proliferation, viability, and expression of tumor antigens and biomarkers. Gene expression was examined using a reverse transcription polymerase chain reaction (RT-PCR), and protein expression was characterized by immunocytochemistry and flow cytometry. Results: All the rhabdoid tumor cell lines tested had high gene expression levels of MUC16, OPN, AFP, and MSLN. Low expression levels of neuron-specific enolase (ENO2) by the two ATRT cell lines demonstrated their lack of neuronal genotype. Membrane-type 1 matrix metalloproteinase (MT1-MMP/MMP-14) and tissue inhibitor of metalloproteinases-2 (TIMP-2) were highly expressed in these malignant rhabdoid tumor cells, indicating their invasive phenotypes. GM6001 significantly decreased ATRT cell proliferation and the gene expression of MSLN, OPN, and several mesenchymal markers, suggesting that inhibition of MMPs may reduce the aggressiveness of rhabdoid cancer cells. Conclusion: The results obtained from this study may advance our knowledge of the molecular landscapes of human malignant rhabdoid tumors and their biomarkers for effective diagnosis and treatment. This work analyzed the expression of human malignant rhabdoid tumor antigens that may serve as biomarkers for the development of novel therapeutic strategies, such as cancer vaccines and targeted and immunotherapies targeting osteopontin and mesothelin, for the treatment of patients with ATRT and other malignant rhabdoid tumors.
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Affiliation(s)
- Timothy Hua
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306-4390, USA; (T.H.); (Z.Z.); (J.C.); (Y.X.)
| | - Ziwei Zeng
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306-4390, USA; (T.H.); (Z.Z.); (J.C.); (Y.X.)
| | - Junji Chen
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306-4390, USA; (T.H.); (Z.Z.); (J.C.); (Y.X.)
| | - Yu Xue
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306-4390, USA; (T.H.); (Z.Z.); (J.C.); (Y.X.)
| | - Yan Li
- Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL 32310-6046, USA;
- Institute of Molecular Biophysics, Florida State University, Tallahassee, FL 32306-4380, USA
| | - Qingxiang Sang
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306-4390, USA; (T.H.); (Z.Z.); (J.C.); (Y.X.)
- Institute of Molecular Biophysics, Florida State University, Tallahassee, FL 32306-4380, USA
- Correspondence: ; Tel.: +1-850-644-8683; Fax: +1-850-644-8281
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Ye Z, Zhao H, Zhou W, Ye T, Geng C, Li X, Yuan L, Du M, Xu H, Wang Q. Lower Serum Matrix Metalloproteinase‑9 in Metastatic Patients with Esophageal Squamous Cell Carcinoma After Concurrent Radiotherapy Was Significant for Prognosis. Onco Targets Ther 2020; 13:12857-12866. [PMID: 33364781 PMCID: PMC7751709 DOI: 10.2147/ott.s280791] [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: 09/15/2020] [Accepted: 11/23/2020] [Indexed: 12/31/2022] Open
Abstract
Aim This study was designed to investigate the relationships of serum matrix metalloproteinase 9 (MMP-9) level and treatment response in esophageal squamous cell carcinoma (ESCC) patients treated with chemotherapy or concurrent radiotherapy. Methods Blood samples from ESCC patients after chemotherapy or concurrent radiotherapy were collected at four different intervals. Serum MMP-9 was determined via Luminex assay in 134 patients with chemotherapy, 73 patients with concurrent radiotherapy, and 183 healthy controls. Results Serum MMP-9 level was significantly higher in patients with ESCC than in healthy controls (P <0.001). Compared with the pre-treatment, a lower level of serum MMP-9 was maintained at four cycles of treatment in ESCC patients with concurrent radiotherapy (P < 0.001). Serum MMP-9 level was obviously lower in ESCC patients with metastasis after concurrent radiotherapy than after chemotherapy (P < 0.05). Patients with higher MMP-9 level (≥820.693 ng/mL) had a shorter mean survival time by 42 months versus lower MMP-9 level (<820.693 ng/mL) after chemotherapy or concurrent radiotherapy (P < 0.001). Conclusion Serum MMP-9 is a potential prognostic biomarker for treatment response to chemotherapy or concurrent radiotherapy in terms of overall survival (OS) in ESCC patients.
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Affiliation(s)
- Ziqi Ye
- The First Clinical Medical College, Graduate School, Nanjing Medical University, Nanjing, Jiangsu 210000, People's Republic of China
| | - Hongying Zhao
- Medical Oncology, Xuzhou Cancer Hospital, Xuzhou, Jiangsu 221005, People's Republic of China
| | - Wuyuan Zhou
- Department of Hepatopancreatobillary Surgery, Xuzhou Cancer Hospital, Xuzhou, Jiangsu 221005, People's Republic of China
| | - Tao Ye
- Department of Radiation Oncology, Xuzhou Cancer Hospital, Xuzhou, Jiangsu 221005, People's Republic of China
| | - Chong Geng
- Department of Radiation Oncology, Xuzhou Cancer Hospital, Xuzhou, Jiangsu 221005, People's Republic of China
| | - Xiaofeng Li
- Department of Radiology, Xuzhou Cancer Hospital, Xuzhou, Jiangsu 221005, People's Republic of China
| | - Lei Yuan
- Department of Intervention, Xuzhou Cancer Hospital, Xuzhou, Jiangsu 221005, People's Republic of China
| | - Mingyu Du
- Department of Radiation Oncology, Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research and Nanjing Medical University Affiliated Cancer Hospital, Nanjing, Jiangsu 210000, People's Republic of China
| | - Heng Xu
- Laboratory of Pharmaceutical Chemistry, Jiangsu Province Institute of Materia Medica, Nanjing Tech University, Nanjing, Jiangsu 210000, People's Republic of China
| | - Qiang Wang
- Department of Radiation Oncology, Xuzhou Cancer Hospital, Xuzhou, Jiangsu 221005, People's Republic of China
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Qi M, Liu DM, Ji W, Wang HL. ATP6V0D2, a subunit associated with proton transport, serves an oncogenic role in esophagus cancer and is correlated with epithelial-mesenchymal transition. Esophagus 2020; 17:456-467. [PMID: 32240421 DOI: 10.1007/s10388-020-00735-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 03/21/2020] [Indexed: 02/03/2023]
Abstract
BACKGROUND The poor prognosis of esophagus cancer (EC) is mainly due to its high invasiveness and metastasis, so it is urgent to search effectively prognostic markers and explore their roles in the mechanism of metastasis. MATERIALS AND METHODS Based on the TCGA database, we downloaded the RNA-Seq for analyzing the expression of ATP6V0D2. QRT-PCR was used to test the mRNA levels of ATP6V0D2 in cell lines. Chi-square tests were used to evaluate the correlation between ATP6V0D2 and clinical characteristics. Prognostic values were determined by Kaplan-Meier methods and cox's regression models. CCK-8 and clone formation assays were employed to evaluate the cell viability, and Transwell assay was implemented to determine the invasive and migratory abilities. Correlations between ATP6V0D2 and motion-related markers were analyzed by the GEPIA database and confirmed by western blot. Moreover, the relationship between ATP6V0D2 and molecules related to cell cycle and apoptosis was also determined by western blot. RESULTS A significant increase was observed in 3 EC-related cell lines compared to the normal cell line. ATP6V0D2 has a connection with the poor prognosis and can be considered as an independent prognosticator for patients with EC. Besides, ATP6V0D2 can improve cells viability as well as invasive and migratory abilities. What's more, downregulation of ATP6V0D2 notably enhanced E-cadherin expression, while decreased N-cadherin, Vimentin, and MMP9 expression, whereas overexpression of ATP6V0D2 presented the opposite outcomes. Furthermore, we found that silencing ATP6V0D2 led to a significant reduction on the protein expression of Cyclin D1, CDK4, Bcl-2, whereas resulted in a notable enhancement on the Bax level. CONCLUSION ATP6V0D2 might be an independent prognosticator for EC patients, and it possibly promotes tumorigenesis by regulating epithelial-mesenchymal transition, cell cycle and apoptosis-related markers, providing the possibility that ATP6V0D2 may be a novel biomarker for the therapeutic intervention of EC.
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Affiliation(s)
- Ming Qi
- Department of Digestive Medicine, Jinan City Central Hospital Affiliated to Shandong University, Jinan, 250013, Shandong, People's Republic of China
| | - Dong-Mei Liu
- Emergency Infusion Room, Jinan City Central Hospital Affiliated to Shandong University, Jinan, 250013, Shandong, People's Republic of China
| | - Wei Ji
- Clinical Experimental Research Center, Jinan City Central Hospital Affiliated to Shandong University, Jinan, 250013, Shandong, People's Republic of China
| | - Hai-Ling Wang
- Department of Pharmacy, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, The East courtyard, No. 42 of West Culture Road, Lixia district, Jinan, 250014, Shandong, People's Republic of China.
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Miguel AFP, Mello FW, Melo G, Rivero ERC. Association between immunohistochemical expression of matrix metalloproteinases and metastasis in oral squamous cell carcinoma: Systematic review and meta-analysis. Head Neck 2019; 42:569-584. [PMID: 31750584 DOI: 10.1002/hed.26009] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 10/09/2019] [Accepted: 10/30/2019] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND The aim of this systematic review (SR) was to summarize and critically appraise available evidence on the association of the immunohistochemical expression of matrix metalloproteinases (MMPs) with the occurrence of lymph node/distant metastasis of oral squamous cell carcinoma (OSCC). METHODS Searches were conducted in five main electronic and three gray literature databases. RESULTS From 2128 records identified, 50 were included for qualitative analysis. A total of 12 MMPs were identified (-1, -2, -3, -7, -8, -9, -10, -11, -13, -25, -26, and MT1-MMP). Most included studies reported a positive association of MMP-1, -2, -3, -7, -9, and MT1-MMP with lymph node metastasis. MMP-8, -25, and -26 were not associated with lymph node metastasis. CONCLUSIONS According to this SR, MMP-1, -2, -3, -7, -9, and MT1-MMP seem to play an important role in lymph node metastasis of OSCC.
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Affiliation(s)
- Andressa F P Miguel
- Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Fernanda W Mello
- Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Gilberto Melo
- Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Elena R C Rivero
- Department of Pathology, Health Sciences Center, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
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Zhang G, Zhang J, Li X, Meng X, Fang X. Identification of the endoplasmic reticulum localization sequence and N-glycosylation of matrix metalloproteinase 26. RSC Adv 2019; 9:23053-23060. [PMID: 35514513 PMCID: PMC9067285 DOI: 10.1039/c9ra05222d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 07/20/2019] [Indexed: 11/21/2022] Open
Abstract
Matrix metalloproteinase 26 (MMP-26), also called endometase and matrilysin-2, belongs to the MMP superfamily. Previous studies have focused on its role in tumor invasion and migration but detailed subcellular localization of MMP-26 remains poorly understood. In this study, sequence deletion mutants of MMP-26 revealed that residues 88-123 function to localize MMP-26 to the endoplasmic reticulum (ER). Moreover, using homologous recombination, we show that exchanging residues 88-123 of secretory MMP-7 with the same region in MMP-26 causes localization of this MMP-7 construct to the ER. Moreover, two (N64, N221) of the three possible N-glycosylation sites in MMP-26 were shown to be N-glycosylated, and N-glycosylation is not required for ER localization. These results demonstrate that the 88-123 region of MMP-26 is a noncanonical ER retention signal and MMP-26 is an N-glycosylated protein, thereby providing novel insights into the properties of MMP-26 within the cell.
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Affiliation(s)
- Guangji Zhang
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, College of Life Science, Jilin University 2699 Qianjin Street Changchun 130012 PR China +86-431-85155219
| | - Jinrui Zhang
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, College of Life Science, Jilin University 2699 Qianjin Street Changchun 130012 PR China +86-431-85155219
| | - Xiang Li
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, College of Life Science, Jilin University 2699 Qianjin Street Changchun 130012 PR China +86-431-85155219
| | - Xin Meng
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, College of Life Science, Jilin University 2699 Qianjin Street Changchun 130012 PR China +86-431-85155219
| | - Xuexun Fang
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, College of Life Science, Jilin University 2699 Qianjin Street Changchun 130012 PR China +86-431-85155219
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He X, Xu X, Zhu G, Ye H. Circulating uPA as a potential prognostic biomarker for resectable esophageal squamous cell carcinoma. Medicine (Baltimore) 2019; 98:e14717. [PMID: 30817615 PMCID: PMC6831346 DOI: 10.1097/md.0000000000014717] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Previous research showed that the 4 genes of matrix metallopeptidase 9 (MMP9), cyto-keratin 20 (CK20), cyto-keratin 19 (CK19) and urokinase type plasminogen activator (uPA) are detectable in the peripheral blood. All the 4 genes are related to tumor invasion and metastasis. However, whether their expression is associated with clinicopathologic factors and the prognosis of patients with esophageal squamous cell carcinoma (ESCC) is still confused. Expression levels of MMP9, CK20, CK19, and uPA were evaluated by quantificational real-time polymerase chain reaction (qRT-PCR) in peripheral blood of 205 ESCC patients who received radical resection. The cut-off value was 1000 copy numbers. Their impacts on clinicopathologic factors and survival were investigated. The uPA expression positively correlated with gender (P = .046) and tumor size (P = .046). Meanwhile, CK19 expression positively correlated with tumor size (P = .029), vascular invasion (P = .024), and CK20 expression positively correlated with tumor size (P = .035) and degrees of differentiation (P = .032). Moreover, the overexpression of MMP9 has a correlation with postoperative radiotherapy (P = .041) and chemotherapy (P = .012). Among the 4 genes, only uPA is a prognostic indicator for disease-free survival and overall survival both in univariate analysis and multivariate analysis (P = .015). This study suggests that circulating uPA mRNA in peripheral blood can serve as a potential unfavorable prognosis biomarker in ESCC. Further perspective, multi-center and large-scale study is still needed.
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Affiliation(s)
- Xiao He
- Department of Radiotherapy, Lishui People's Hospital, Lishui
| | - Xiaoling Xu
- Key Laboratory of Diagnosis and Treatment Technology for Thoracic Cancer, Zhejiang Cancer Research Institute, Zhejiang Cancer Hospital, Zhejiang Cancer Center, Hangzhou, People's Republic of China
| | - Guanxia Zhu
- Key Laboratory of Diagnosis and Treatment Technology for Thoracic Cancer, Zhejiang Cancer Research Institute, Zhejiang Cancer Hospital, Zhejiang Cancer Center, Hangzhou, People's Republic of China
| | - Hong Ye
- Department of Radiotherapy, Lishui People's Hospital, Lishui
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Guo JG, Guo CC, He ZQ, Cai XY, Mou YG. High MMP-26 expression in glioma is correlated with poor clinical outcome of patients. Oncol Lett 2018; 16:2237-2242. [PMID: 30008924 PMCID: PMC6036463 DOI: 10.3892/ol.2018.8880] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Accepted: 05/22/2018] [Indexed: 02/03/2023] Open
Abstract
To date the management of glioma remains a great challenge in cancer therapy worldwide. The identification of novel diagnostic and therapeutic methods is required. Although there is data indicating that matrix metalloproteinase (MMP)-26 serves an important role in many human cancer types, its clinical significance in glioma remains uncertain. The present study aimed to evaluate MMP-26 expression in human astrocytic glioma specimens, and investigate its role and significance in the progression of astrocytic glioma. Immunohistochemistry was performed to assess MMP-26 expression in astrocytic glioma tissues. The levels of MMP-26 expression and its relevance to the clinicopathological features and prognostic factors in patients with astrocytic glioma patients were then investigated. The results demonstrated that MMP-26 expression was significantly assocaited with the World Health Organization grade (P<0.05). Additionally, it was identified that MMP-26 expression was an effective predictor of the overall survival of patients with astrocytic glioma (P<0.05). Analyses of univariate and multivariate Cox regression confirmed that MMP-26 expression was an independent factor for evaluating the prognosis of astrocytic glioma patients (P<0.05). The current results support that MMP-26 may be a novel indicator of diagnosis and an independent factor for evaluating prognosis in patients with glioma.
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Affiliation(s)
- Jian-Gui Guo
- Department of Radiation Oncology, The First People's Hospital of Foshan, Foshan, Guandong 528000, P.R. China
| | - Cheng-Cheng Guo
- State Key Laboratory of Oncology in South China, Cancer Center, Sun Yat-Sen University, Guangzhou, Guandong 510060, P.R. China.,Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University, Guangzhou, Guandong 510060, P.R. China.,Department of Neurosurgery, Cancer Center, Sun Yat-Sen University, Guangzhou, Guandong 510060, P.R. China
| | - Zhen-Qiang He
- State Key Laboratory of Oncology in South China, Cancer Center, Sun Yat-Sen University, Guangzhou, Guandong 510060, P.R. China.,Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University, Guangzhou, Guandong 510060, P.R. China.,Department of Neurosurgery, Cancer Center, Sun Yat-Sen University, Guangzhou, Guandong 510060, P.R. China
| | - Xiu-Yu Cai
- State Key Laboratory of Oncology in South China, Cancer Center, Sun Yat-Sen University, Guangzhou, Guandong 510060, P.R. China.,Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University, Guangzhou, Guandong 510060, P.R. China.,Department of VIP Region, Cancer Center, Sun Yat-Sen University, Guangzhou, Guandong 510060, P.R. China
| | - Yong-Gao Mou
- State Key Laboratory of Oncology in South China, Cancer Center, Sun Yat-Sen University, Guangzhou, Guandong 510060, P.R. China.,Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University, Guangzhou, Guandong 510060, P.R. China.,Department of Neurosurgery, Cancer Center, Sun Yat-Sen University, Guangzhou, Guandong 510060, P.R. China
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Gwak J, Shin JY, Lee K, Hong SK, Oh S, Goh SH, Kim WS, Ju BG. SFMBT2 (Scm-like with four mbt domains 2) negatively regulates cell migration and invasion in prostate cancer cells. Oncotarget 2018; 7:48250-48264. [PMID: 27340776 PMCID: PMC5217015 DOI: 10.18632/oncotarget.10198] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Accepted: 06/04/2016] [Indexed: 12/12/2022] Open
Abstract
Metastatic prostate cancer is the leading cause of morbidity and mortality in men. In this study, we found that expression level of SFMBT2 is altered during prostate cancer progression and has been associated with the migration and invasion of prostate cancer cells. The expression level of SFMBT2 is high in poorly metastatic prostate cancer cells compared to highly metastatic prostate cancer cells. We also found that SFMBT2 knockdown elevates MMP-2, MMP-3, MMP-9, and MMP-26 expression, leading to increased cell migration and invasion in LNCaP and VCaP cells. SFMBT2 interacts with YY1, RNF2, N-CoR and HDAC1/3, as well as repressive histone marks such as H3K9me2, H4K20me2, and H2AK119Ub which are associated with transcriptional repression. In addition, SFMBT2 knockdown decreased KAI1 gene expression through up-regulation of N-CoR gene expression. Expression of SFMBT2 in prostate cancer was strongly associated with clinicopathological features. Patients having higher Gleason score (≥ 8) had substantially lower SFMBT2 expression than patients with lower Gleason score. Moreover, tail vein or intraprostatic injection of SFMBT2 knockdown LNCaP cells induced metastasis. Taken together, our findings suggest that regulation of SFMBT2 may provide a new therapeutic strategy to control prostate cancer metastasis as well as being a potential biomarker of metastatic prostate cancer.
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Affiliation(s)
- Jungsug Gwak
- Department of Life Science, Sogang University, Seoul 121-742, Republic of Korea
| | - Jee Yoon Shin
- Department of Life Science, Sogang University, Seoul 121-742, Republic of Korea
| | - Kwanghyun Lee
- Department of Life Science, Sogang University, Seoul 121-742, Republic of Korea
| | - Soon Ki Hong
- Department of Life Science, Sogang University, Seoul 121-742, Republic of Korea
| | - Sangtaek Oh
- Department of Bio and Fermentation Convergence Technology, Kookmin University, Seoul 136-702, Republic of Korea
| | - Sung-Ho Goh
- Research Institute, National Cancer Center, Goyang, Gyeonggi-do 410-769, Republic of Korea
| | - Won Sun Kim
- Department of Life Science, Sogang University, Seoul 121-742, Republic of Korea
| | - Bong Gun Ju
- Department of Life Science, Sogang University, Seoul 121-742, Republic of Korea
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Parrish AR. Matrix Metalloproteinases in Kidney Disease: Role in Pathogenesis and Potential as a Therapeutic Target. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2017; 148:31-65. [PMID: 28662825 DOI: 10.1016/bs.pmbts.2017.03.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Matrix metalloproteinases (MMPs) are large family of proteinases. In addition to a fundamental role in the remodeling of the extracellular matrix, they also cleave a number of cell surface proteins and are involved in multiple cellular processes. MMP activity is regulated via numerous mechanisms, including inhibition by endogenous tissue inhibitors of metalloproteinases (TIMPs). Similar to MMPs, a role for TIMPs has been established in multiple cell signaling pathways. Aberrant expression of MMPs and TIMPS in renal pathophysiology has long been recognized, and with the generation of specific knockout mice, the mechanistic role of several MMPs and TIMPs is becoming more understood and has revealed both pathogenic and protective roles. This chapter will focus on the expression and localization of MMPs and TIMPs in the kidney, as well as summarizing the current information linking these proteins to acute kidney injury and chronic kidney disease. In addition, we will summarize studies suggesting that MMPs and TIMPs may be biomarkers of renal dysfunction and represent novel therapeutic targets to attenuate kidney disease.
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Affiliation(s)
- Alan R Parrish
- School of Medicine, University of Missouri, Columbia, MO, United States.
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12
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Matrix Metalloproteinases in the Interstitial Space. Protein Sci 2016. [DOI: 10.1201/9781315374307-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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13
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Lian PL, Liu Z, Yang GY, Zhao R, Zhang ZY, Chen YG, Zhuang ZN, Xu KS. Integrin αvβ6 and matrix metalloproteinase 9 correlate with survival in gastric cancer. World J Gastroenterol 2016; 22:3852-3859. [PMID: 27076771 PMCID: PMC4814749 DOI: 10.3748/wjg.v22.i14.3852] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Revised: 01/22/2016] [Accepted: 02/22/2016] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the expression of integrin αvβ6 and matrix metalloproteinase 9 (MMP-9), their association with prognostic factors and to assess their predictive role in gastric cancer patients.
METHODS: Immunohistochemistry was used to determine the expressions of integrin αvβ6 and MMP-9 in 126 specimens from patients with primary gastric carcinoma. Associations between immunohistochemical staining and various clinic pathologic variables of tissue specimens were evaluated by the χ2 test and Fisher’s exact test. Expression correlation of αvβ6 and MMP-9 was assessed using bivariate correlation analysis. The patients were followed-up every 3 mo in the first two years and at least every 6 mo afterwards, with a median follow-up of 56 mo (ranging from 2 mo to 94 mo). Four different combinations of αvβ6 and MMP-9 levels (that is, both markers positive, both markers negative, αvβ6 positive with MMP-9 negative, and αvβ6 negative with MMP-9 positive) were evaluated for their relative effect on survival. The difference in survival curves was evaluated with a log-rank test. Survival analysis was conducted using the Kaplan-Meier survival and Cox proportional hazards model analysis.
RESULTS: The expressions of integrin αvβ6 and MMP-9 were investigated in 126 cases, among which 34.92% were positive for αvβ6 expression, and 42.06% for MMP-9 expression. The expression of αvβ6 was associated with Lauren type, differentiation, N stage, and TNM stage (the P values were 0.006, 0.038, 0.016, and 0.002, respectively). While MMP-9 expression was associated with differentiation, T stage, N stage, and TNM stage (the P values were 0.039, 0.014, 0.033, and 0.008, respectively). The positive correlation between αvβ6 and MMP-9 in gastric cancer was confirmed by a correlation analysis. The Kaplan-Meier survival analysis showed that patients with expression of αvβ6 or MMP-9 alone died earlier than those with negative expression and that patients who were both αvβ6 and MMP-9 positive had a shorter overall survival than those with the opposite pattern (both αvβ6 and MMP-9 negative) (P = 0.000). A Cox model indicated that positive expression of αvβ6 and MMP-9, diffuse Lauren type, as well as a senior grade of N stage, M stage, and TNM stage were predictors of a poor prognosis in univariate analysis. Only αvβ6 and MMP-9 retained their significance when adjustments were made for other known prognostic factors in multivariate analysis (RR = 2.632, P = 0.003 and RR = 1.813, P = 0.007).
CONCLUSION: The expression of αvβ6 and MMP-9 are closely correlated, and the combinational pattern of αvβ6 and MMP-9 can serve as a more effective prognostic index for gastric cancer patients.
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Zhao D, Lu Y, Yang C, Zhou X, Xu Z. Activation of FGF receptor signaling promotes invasion of non-small-cell lung cancer. Tumour Biol 2015; 36:3637-42. [PMID: 25566961 DOI: 10.1007/s13277-014-3001-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2014] [Accepted: 12/18/2014] [Indexed: 12/30/2022] Open
Abstract
The molecular regulation of metastasis of non-small-cell lung cancer (NSCLC) remains not completely defined. Here we showed significant higher MMP26 in the resected NSCLC than adjacent healthy tissue from the patients. Moreover, a strong correlation between MMP26 and the phosphorylated fibroblast growth factor receptor 1 (FGFR1) was detected. To examine the causal relationship between activated FGFR signaling and MMP26, we studied a human NSCLC cell line, A549. We found that FGF1-induced FGFR1 phosphorylation in A549 cells activated MMP26, resulting in an increase in cancer invasiveness. Inhibition of FGFR1 phosphorylation abolished FGF1-stimulated MMP26 activation, suggesting that activation of FGFR signaling pathway in NSCLC promotes cancer metastasis through MMP26. To define the signal transduction cascades downstream of FGFR1 activation for MMP26 activation, we used specific inhibitors for PI3K, ERK/MAPK, and JNK, respectively, to the FGF1-stimulated A549 cells. We found that only inhibition of JNK significantly decreased the activation of MMP26 in response to FGF1 stimulation, suggesting that activation of FGFR1 signaling may activate JNK to activate MMP26 in NSCLC. Our study thus highlights FGFR signaling pathway and MMP26 as novel therapeutic targets for NSCLC therapy.
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Affiliation(s)
- Deping Zhao
- Department of Thoracic Surgery, Changzheng Hospital, Second Military Medical University, 415 Fengyang Road, Shanghai, 200433, China,
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15
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Regulation of chondrosarcoma invasion by MMP26. Tumour Biol 2014; 36:365-9. [PMID: 25262277 DOI: 10.1007/s13277-014-2657-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Accepted: 09/18/2014] [Indexed: 10/24/2022] Open
Abstract
The molecular mechanism underlying metastasis of chondrosarcoma (CS) remains unclarified. Here, we show that matrix metalloproteinase-26 (MMP26) level is significantly higher in the resected CS than in the adjacent healthy chondral tissue from the patients. To examine the role of MMP26 in CS invasion, we used a human CS line SW1353 and we either overexpressed or inhibited MMP26 in these cells. We found that overexpression of MMP26 in SW1353 cells increased cell invasiveness, while inhibition of MMP26 decreased cell invasiveness. To define the signal transduction cascades downstream of MMP26 activation, we applied specific inhibitors for PI3K, ERK/MAPK, JNK, and Wnt signaling, respectively, to the MMP26-overexpressing SW1353 cells. We found that only inhibition of Wnt signaling by either metformin or IWP-2 significantly decreased the effect of MMP26 on cancer cell invasion, possibly through increasing β-catenin phosphorylation. Further, a strong correlation was detected between MMP26 levels and the ratio of phosphorylated/total β-catenin in CS from the patients. Taken together, our study highlights MMP26-regulated Wnt signaling as a novel therapeutic target for CS.
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Wang J, Su H, Han X, Xu K. Inhibition of fibroblast growth factor receptor signaling impairs metastasis of hepatocellular carcinoma. Tumour Biol 2014; 35:11005-11. [PMID: 25091573 DOI: 10.1007/s13277-014-2384-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 07/23/2014] [Indexed: 01/13/2023] Open
Abstract
The molecular mechanism underlying metastasis of hepatocellular carcinoma (HCC) remains elusive. Here, we showed that matrix metalloproteinase (MMP) 7 and MMP26 levels are significantly higher in the resected HCC than in the adjacent healthy hepatic cells from the patients. Moreover, a strong correlation of the levels of MMP7 or MMP26 with the phosphorylated fibroblast growth factor receptor 2 (FGFR2) was detected. To prove a causal link between the activation of FGFR signaling pathway and expression of MMP7 and MMP26, we used two human HCC lines, HepG2 and HuH-7, to study the underlying molecular basis. We found that FGF1-induced FGFR2 phosphorylation in either line resulted in significant activation of MMP7 and MMP26 and consequently an increase in cancer invasiveness. Inhibition of FGFR2 phosphorylation in HCC abolished FGF1-stimulated MMP7 and MMP26 expression, suggesting that activation of the FGFR signaling pathway in HCC may promote cancer metastasis by inducing MMP7 and MMP26 expression. To define the signal transduction cascades downstream of FGFR2 activation for MMP7 and MMP26 activation, we applied specific inhibitors for phosphatidylinositol-3 kinase (PI3K), extracellular signal-related kinase/mitogen-activated protein kinase (ERK/MAPK), and Jun N-terminal kinase (JNK), respectively, to the FGF1-stimulated HCC cells. We found that only inhibition of JNK significantly decreased the activation of MMP26 in response to FGF1 stimulation, and only inhibition of PI3K significantly decreased the activation of MMP7 in response to FGF1 stimulation, suggesting that the activation of the FGFR2 signaling may activate PI3K to activate MMP7 and activate JNK to activate MMP26, in HCC. Our study thus highlights the FGFR2 signaling pathway and MMP7 and MMP26 as novel therapeutic targets for HCC.
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Affiliation(s)
- Jiajun Wang
- Department of Radiology, the First Hospital of China Medical University, 155 Nanjing North Street, Shenyang, 110001, Liaoning, China
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Zeng R, Duan L, Kong Y, Liang Y, Wu X, Wei X, Yang K. Clinicopathological and prognostic role of MMP-9 in esophageal squamous cell carcinoma: a meta-analysis. Chin J Cancer Res 2014; 25:637-45. [PMID: 24385690 DOI: 10.3978/j.issn.1000-9604.2013.11.03] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Accepted: 10/21/2013] [Indexed: 12/25/2022] Open
Abstract
OBJECTIVE Many studies reported that matrix metalloproteinase-9 (MMP-9) participated in the development of esophageal squamous cell carcinoma (ESCC) and resulted in poor prognosis, however, they all included few patients and had inconsistent results. So we conducted a meta-analysis to explore the correlation between overexpression of MMP-9 and the clinicopathological characteristics and overall survival (OS) of ESCC. METHODS PubMed, EMBASE, Web of Science, Chinese Biomedical Literature Database, Google Scholar and other databases were searched for relevant studies. The Newcastle-Ottawa quality assessment scale was used to assess the methodological quality of included study and RevMan 5.2 software was used to conduct meta-analysis. RESULTS A total of 35 studies were included, and the results of meta-analysis showed that overexpression of MMP-9 was associated with grade of differentiation [well/moderate vs. poor: odds ratio (OR): 0.39, 95% confidence interval (CI): 0.29-0.52; P<0.00001], lymph node metastasis (negative vs. positive: OR: 0.24, 95% CI: 0.16-0.34; P<0.00001), TNM stage (T1/T2 vs. T3/T4: OR: 0.28, 95% CI: 0.14-0.54; P=0.0002), the depth of invasion (T1/T2 vs. T3/T4: OR: 0.29, 95% CI: 0.17-0.49; P<0.00001), and vascular invasion of ESCC (negative vs. positive: OR: 0.35, 95% CI: 0.21-0.58; P<0.0001), and also associated with poor overall survival of ESCC (HR: 2.17, 95% CI: 1.32-3.57; P=0.002). Subgroup analysis showed that more than 10% of carcinoma cell staining was associated with significant increase of mortality risk (HR: 2.44, 95% CI: 1.16-5.15; P=0.02), and sensitive analysis suggested that MMP-9 was an independent prognostic factor in ESCC (HR: 1.49, 95% CI: 1.16-1.91; P=0.002). CONCLUSIONS On the basis of limited evidence, overexpression of MMP-9 may be a potential independent prognosis factor of ESCC patients in Asia, and high-quality studies assessing the prognostic significance of MMP-9 for ESCC patients are still needed.
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Affiliation(s)
- Rong Zeng
- Evidence-Based Medicine Center of Lanzhou University, Lanzhou 730000, China; ; The Second Hospital of Lanzhou University, Lanzhou 730000, China
| | - Lei Duan
- Evidence-Based Medicine Center of Lanzhou University, Lanzhou 730000, China; ; The Second Hospital of Lanzhou University, Lanzhou 730000, China
| | - Yuke Kong
- The Second Hospital of Lanzhou University, Lanzhou 730000, China
| | - Yaojun Liang
- The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - Xiaolu Wu
- The Second Hospital of Lanzhou University, Lanzhou 730000, China
| | | | - Kehu Yang
- Evidence-Based Medicine Center of Lanzhou University, Lanzhou 730000, China
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Matrilysin-2 expression in colorectal cancer is associated with overall survival of patients. Tumour Biol 2013; 35:3569-74. [PMID: 24318970 DOI: 10.1007/s13277-013-1471-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 11/26/2013] [Indexed: 12/12/2022] Open
Abstract
Tumor recurrence and metastasis are pressing issues of patients with colorectal cancer who receive surgery. Matrilysin-2 (MMP-26) has been proved to play an important role during invasion and metastasis of some human solid tumor. We aimed to investigate the clinical significance and prognostic value of matrilysin-2 in human colorectal cancer. Colorectal cancer and adjacent normal samples from 201 patients were collected. Matrilysin-2 expression level was investigated by immunohistochemistry assay, and its association with overall survival of patients was analyzed by statistical analysis. Results showed that matrilysin-2 expression level significantly elevated in colorectal cancer compared with adjacent normal specimens. Matrilysin-2 expression was also found to be associated with cancer invasion, lymph node metastasis, distant metastasis, and TNM stage. In addition, survival analysis showed that elevated matrilysin-2 expression was associated with poor overall survival of patients. Cox's proportional hazards model indicated that matrilysin-2 was an independent prognostic marker for patients with colorectal cancer. The present study found that the expression of matrilysin-2 increased in colorectal cancer and was associated with tumor progression. It also provided the first evidence that matrilysin-2 expression was an independent prognostic factor for patients with colorectal cancer, which might be a high specific biomarker for colorectal cancer.
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Tang XP, Tang GD, Fang CY, Liang ZH, Zhang LY. Effects of ginsenoside Rh2 on growth and migration of pancreatic cancer cells. World J Gastroenterol 2013; 19:1582-1592. [PMID: 23538603 PMCID: PMC3602475 DOI: 10.3748/wjg.v19.i10.1582] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Revised: 10/17/2012] [Accepted: 12/17/2012] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the effects of ginsenoside Rh2 on the human pancreatic cancer cell line Bxpc-3.
METHODS: The human pancreatic cancer cell line Bxpc-3 was cultured in vitro and treated with or without ginsenoside Rh2. Growth rates for Bxpc-3 cells were assessed by methyl thiazolyl tetrazolium (MTT) and colony formation assays. Cell cycle changes were analyzed by flow cytometry. Apoptosis was measured by flow cytometry and Hoechst 33258 fluorescence staining. A scratch assay and a Matrigel invasion assay were used to detect cell migration and invasion. Expression of Bax, Bcl-2, survivin, cyclin D1, matrix metalloproteinase (MMP)-2, MMP-9, cleaved caspase-3, caspase-8, and caspase-9 mRNA were determined by reverse transcriptase-polymerase chain reaction (RT-PCR). Bax, Bcl-2, survivin, cyclin D1, cleaved caspase-3, caspase-8 and caspase-9 protein levels were examined by western blotting. Expression of MMP-2 and MMP-9 proteins in culture supernatants were determined by enzyme-linked immunosorbent assay (ELISA).
RESULTS: Rh2 significantly inhibited Bxpc-3 cell proliferation in a dose- and time-dependent manner, as evaluated by the MTT (P < 0.05) and colony formation assays (P < 0.05). Compared to the control group, Rh2 significantly increased the percentage of Bxpc-3 cells in the G0/G1 phase from 43.32% ± 2.17% to 71.32% ± 1.16%, which was accompanied by a decrease in S phase (from 50.86% ± 1.29% to 28.48% ± 1.18%) and G2/M phase (from 5.81% ± 1.19% to 0.20% ± 0.05%) in a dose-dependent manner (P < 0.05), suggesting that Rh2 arrested cell cycle progression at the G0/G1 phase, as measured by flow cytometry. Compared to the control group, cells treated with Rh2 showed significantly higher apoptosis ratios in a dose-dependent manner (percentage of early apoptotic cells: from 5.29% ± 2.28% to 38.90% ± 3.42% (F = 56.20, P < 0.05); percentage of late apoptotic cells: from 4.58% ± 1.42% to 36.32% ± 2.73% (F = 86.70, P < 0.05). Rh2 inhibited Bxpc-3 cell migration and invasion, as detected by scratch wound healing assay and Matrigel invasion assay [percentages of scratch wound healing for 12 h, 24 h and 48 h (control vs experimental group): 37.3% ± 4.8% vs 18.30% ± 1.65%, 58.7% ± 3.5% vs 38.00% ± 4.09% and 93.83% ± 4.65% vs 65.50% ± 4.09%, respectively; t = 6.489, t = 6.656 and t = 7.926, respectively, P < 0.05; the number of cells invading at various concentrations (0 μmol/L, 35 μmol/L, 45 μmol/L and 55 μmol/L): 81.10 ± 9.55, 46.40 ± 6.95, 24.70 ± 6.88 and 8.70 ± 3.34, respectively (F = 502.713, P < 0.05)]. RT-PCR, western blotting or ELISA showed that mRNA and protein expression of Bax, cleaved caspase-3 and caspase-9 were upregulated (P < 0.05), while mRNA and protein expression of Bcl-2, survivin, cyclin D1, MMP-2 and MMP-9 were downregulated (P < 0.05).
CONCLUSION: Ginsenoside Rh2 inhibits proliferation, migration and invasion and induces apoptosis of the human pancreatic cancer cell line Bxpc-3.
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Mohtasham N, Babakoohi S, Shiva A, Shadman A, Kamyab-Hesari K, Shakeri MT, Sharifi-Sistani N. Immunohistochemical study of p53, Ki-67, MMP-2 and MMP-9 expression at invasive front of squamous cell and verrucous carcinoma in oral cavity. Pathol Res Pract 2013; 209:110-4. [DOI: 10.1016/j.prp.2012.11.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Revised: 08/27/2012] [Accepted: 11/13/2012] [Indexed: 10/27/2022]
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Singh B, Fleury C, Jalalvand F, Riesbeck K. Human pathogens utilize host extracellular matrix proteins laminin and collagen for adhesion and invasion of the host. FEMS Microbiol Rev 2012; 36:1122-80. [PMID: 22537156 DOI: 10.1111/j.1574-6976.2012.00340.x] [Citation(s) in RCA: 199] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2011] [Revised: 02/08/2012] [Accepted: 03/29/2012] [Indexed: 01/11/2023] Open
Abstract
Laminin (Ln) and collagen are multifunctional glycoproteins that play an important role in cellular morphogenesis, cell signalling, tissue repair and cell migration. These proteins are ubiquitously present in tissues as a part of the basement membrane (BM), constitute a protective layer around blood capillaries and are included in the extracellular matrix (ECM). As a component of BMs, both Lns and collagen(s), thus function as major mechanical containment molecules that protect tissues from pathogens. Invasive pathogens breach the basal lamina and degrade ECM proteins of interstitial spaces and connective tissues using various ECM-degrading proteases or surface-bound plasminogen and matrix metalloproteinases recruited from the host. Most pathogens associated with the respiratory, gastrointestinal, or urogenital tracts, as well as with the central nervous system or the skin, have the capacity to bind and degrade Lns and collagen(s) in order to adhere to and invade host tissues. In this review, we focus on the adaptability of various pathogens to utilize these ECM proteins as enhancers for adhesion to host tissues or as a targets for degradation in order to breach the cellular barriers. The major pathogens discussed are Streptococcus, Staphylococcus, Pseudomonas, Salmonella, Yersinia, Treponema, Mycobacterium, Clostridium, Listeria, Porphyromonas and Haemophilus; Candida, Aspergillus, Pneumocystis, Cryptococcus and Coccidioides; Acanthamoeba, Trypanosoma and Trichomonas; retrovirus and papilloma virus.
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Affiliation(s)
- Birendra Singh
- Medical Microbiology, Department of Laboratory Medicine Malmö, Skåne University Hospital, Lund University, Malmö, Sweden
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Tang XP, Tang GD, Fang CY. Metformin inhibits cell migration in human pancreatic cancer cell line Bxpc-3. Shijie Huaren Xiaohua Zazhi 2012; 20:1468-1472. [DOI: 10.11569/wcjd.v20.i16.1468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the effect of metformin on cell migration in human pancreatic cell line Bxpc-3, and to explore the possible mechanism involved.
METHODS: Cultured Bxpc-3 cells were treated with metformin as trial group or without metformin as control group. Survival rate of Bxpc-3 cells was determined by methyl thiazolyl tetrazolium (MTT) assay. Scratch assay was used to detect cell migration. Expression of MMP2 and MMP-9 mRNAs was determined by RT-PCR. The contents of MMP-2 and MMP-9 proteins in culture supernatants were determined by ELISA.
RESULTS: Compared to control cells, metformin decreased the proliferation of Bxpc-3 cells in a dose- and time-dependent manner (F = 8.991, 124, 114.61, all P < 0.01), reduced the rate of wound closure (t = 7.683, 9.013, 10.471, all P < 0.01), and down-regulated the protein and mRNA expression of MMP-2 and MMP-9 (mRNA: t = 16.563, 28.494, both P < 0.01; protein: t = 9.428, 13.542, both P < 0.01).
CONCLUSION: Metformin can inhibit the proliferation and migration of Bxpc-3 cells by inhibiting the activity of MMP-2 and MMP-9.
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Selvan B, Ramachandran A, Korula A, Amirtharaj GJ, Kettimuthu K, Nair S, Nair A, Samuel P, Mathew G. Low dose aspirin prevents duodenoesophageal reflux induced mucosal changes in wistar rat esophagus by MAP kinase mediated pathways. Int J Surg 2012; 10:73-9. [DOI: 10.1016/j.ijsu.2011.12.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Revised: 11/23/2011] [Accepted: 12/05/2011] [Indexed: 01/01/2023]
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Barros SSLV, Henriques ÁCG, Pereira KMA, de Medeiros AMC, Galvão HC, Freitas RDA. Immunohistochemical expression of matrix metalloproteinases in squamous cell carcinoma of the tongue and lower lip. Arch Oral Biol 2011; 56:752-60. [PMID: 21255765 DOI: 10.1016/j.archoralbio.2010.11.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2010] [Revised: 09/30/2010] [Accepted: 11/08/2010] [Indexed: 10/18/2022]
Abstract
OBJECTIVE To evaluate the immunohistochemical expression of MMP-1, -2, -7, -9 and -26 in oral squamous cell carcinomas (SCCs) according to tumour site and histological grade of malignancy. STUDY DESIGN Fifteen cases of SCC of the lower lip and 15 cases of tongue SCC were selected and divided into low grade malignancy (n = 17) and high grade malignancy (n = 13). RESULTS Higher immunohistochemical expression of MMPs by neoplastic cells was observed in tongue SCCs, with a statistically significant difference for MMP-9 (P < 0.05). High-grade SCCs showed a higher expression of MMPs, except for MMP-2, with a statistically significant difference for MMP-7 (P < 0.05) and MMP-26 (P < 0.05). In addition, a direct association was observed between morphological scores of malignancy and MMP immunoreactivity, with the association being significant for MMP-7 and MMP-26. CONCLUSION The present results demonstrate the important role of MMPs in the development of SCCs of the lower lip and tongue.
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de Amorim RFB, da Silveira EJD, Queiroz LMG, Galvão HC, de Souza LB, de Almeida Freitas R. Matrilysins may not predict the metastatic potential in squamous cell carcinoma of the tongue. Acta Odontol Scand 2010; 68:228-31. [PMID: 20491537 DOI: 10.3109/00016357.2010.490955] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE To examine immunoexpression of matrix metalloproteinase (MMP)-7 and -26 in squamous cell carcinoma (SCC) of the tongue and its relation with cervical metastasis. MATERIAL AND METHODS Twenty-four cases were selected and divided into two groups: a metastatic group (n = 12) and a non-metastatic group (n = 12). Cases were graded as either negative (score 0), positive (score +) or strongly positive (score ++). RESULTS MMP-7 expression was identical in both groups, with 17% of the cases graded as score 0, 50% as score + and 33% as score ++. MMP-26 expression was 25% score 0, 8% score + and 67% score ++ in the metastatic group, and 8% score 0, 50% score + and 42% score ++ in the non-metastatic group. Statistical analysis showed no differences between the studied groups and no correlations between proteins. CONCLUSIONS MMP-7 and -26 immunostaining is not a useful indicator of the metastatic potential of SCCs of the tongue. However, the role of these proteins in the process of invasion and metastasis cannot be ruled out since their more marked presence along the tumor invasion front compared to more central areas of the tumors indicates higher secretion of these proteases in this region, facilitating the invasion process.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Carcinoma, Squamous Cell/enzymology
- Carcinoma, Squamous Cell/genetics
- Carcinoma, Squamous Cell/pathology
- Female
- Gene Expression Regulation, Enzymologic
- Humans
- Immunoenzyme Techniques
- Lymphatic Metastasis
- Male
- Matrix Metalloproteinase 7/biosynthesis
- Matrix Metalloproteinase 7/genetics
- Matrix Metalloproteinases, Membrane-Associated/biosynthesis
- Matrix Metalloproteinases, Membrane-Associated/genetics
- Matrix Metalloproteinases, Secreted/biosynthesis
- Matrix Metalloproteinases, Secreted/genetics
- Middle Aged
- Statistics, Nonparametric
- Tongue Neoplasms/enzymology
- Tongue Neoplasms/genetics
- Tongue Neoplasms/pathology
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Liu J, Cao B, Li YX, Wu XQ, Wang YL. GnRH I and II up-regulate MMP-26 expression through the JNK pathway in human cytotrophoblasts. Reprod Biol Endocrinol 2010; 8:5. [PMID: 20074375 PMCID: PMC2819245 DOI: 10.1186/1477-7827-8-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2009] [Accepted: 01/15/2010] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Matrix metalloproteinase-26 (MMP-26), one of the main mediators of extracellular matrix (ECM) degradation, has been shown to exist in trophoblasts of human placenta and to play a role in trophoblast cell invasion. However, little is known about the regulation of MMP-26 expression in human trophoblasts. Recently, gonadotropin-releasing hormone I (GnRH I) and GnRH II have been shown to regulate the expression of MMP-2, MMP-9/tissue inhibitor of metalloproteinases 1 (TIMP-1), and urokinase plasminogen activator (uPA)/plasminogen activator inhibitor (PAI) in human trophoblasts, suggesting that these two hormones may work as paracrine and/or autocrine regulators in modulating the activities of various protease systems at the feto-maternal interface. In this study, we determined the regulatory effects of GnRH I and GnRH II on the expression of MMP-26 in human immortalized cytotrophoblast-like cell line, B6Tert-1. METHODS Real-time PCR was used to quantify mRNA levels of MMP-26 in human trophoblast-like cell line, B6Tert-1 and primary cultured cytotrophoblasts. Western blotting was used to characterize the expression of MMP-26 and the phosphorylation of c-Jun NH2-terminal kinase (JNK) and extracellular signal-regulated kinase 1/2 (ERK1/2) in B6Tert-1 cells after treatment with GnRH I and GnRH II. RESULTS We found that GnRH I increased MMP-26 expression in B6Tert-1 cells after 12 h of treatment at both the mRNA and protein level, while GnRH II increased MMP-26 expression beginning at 3 h of treatment. Treatment of GnRH I at 1 nM resulted in maximal increase of MMP-26 mRNA and protein levels, whereas GnRH II treatment at a concentration of 100 nM was required to induce maximal increase in MMP-26 expression. In addition, we demonstrated that the activation of JNK, but not ERK1/2, was required for GnRH I and II-stimulated MMP-26 production in B6Tert-1 cells and primary cytotrophoblasts. CONCLUSIONS These novel findings indicated that GnRH I and II could up-regulate MMP-26 expression through the JNK signaling pathway in human trophoblast-like/trophoblast cells.
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Affiliation(s)
- Jing Liu
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 10029, PR China
| | - Bin Cao
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - Yu-xia Li
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - Xiao-qiu Wu
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - Yan-ling Wang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China
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Oka T, Yamamoto H, Sasaki S, Ii M, Hizaki K, Taniguchi H, Adachi Y, Imai K, Shinomura Y. Overexpression of beta3/gamma2 chains of laminin-5 and MMP7 in biliary cancer. World J Gastroenterol 2009; 15:3865-73. [PMID: 19701966 PMCID: PMC2731248 DOI: 10.3748/wjg.15.3865] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2009] [Revised: 07/15/2009] [Accepted: 07/22/2009] [Indexed: 02/06/2023] Open
Abstract
AIM To clarify the clinicopathological significance of laminin-5 gamma2 (LNgamma2) and beta3 (LNbeta3) chains and MMP7 expression in biliary tract cancer. METHODS We analyzed the association between immunohistochemically detected LNgamma2, LNbeta3, and MMP7 expression in biliary tract cancer and clinicopathological characteristics. Activity of MMP7 was analyzed by casein zymography. An in vitro invasion assay after treatment with MMP7-specific siRNA was performed. RESULTS LNgamma2 expression was predominantly observed in carcinoma cells at the invasive front. LNgamma2 expression was seen in 57% of patients with biliary tract cancer, and was associated with depth of invasion, histologic type, and advanced stage. The expression pattern of LNbeta3 was classified into two types: invasive front dominant type (38%) and diffuse type (28%). The invasive front dominant type was associated with histologic type and advanced stage. MMP7 positivity was correlated with LNgamma2 or LNbeta3 expression but not with clinicopathological characteristics. Active MMP7 detected by casein zymography was correlated with depth of invasion and advanced stage. Downregulation of MMP7 expression by siRNA resulted in a significant decrease in biliary tract cancer cell invasion in vitro. CONCLUSION Our results suggest that LNgamma2 and LNbeta3, in conjunction with MMP7, play a key role in the progression of biliary tract cancer.
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Sakaeda T, Yamamori M, Kuwahara A, Nishiguchi K. Pharmacokinetics and pharmacogenomics in esophageal cancer chemoradiotherapy. Adv Drug Deliv Rev 2009; 61:388-401. [PMID: 19135108 DOI: 10.1016/j.addr.2008.10.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2008] [Accepted: 10/30/2008] [Indexed: 12/15/2022]
Abstract
Esophageal cancer is one of the most lethal malignancies. Surgical resection of the tumor from the primary site has been the standard treatment, especially for localized squamous cell carcinoma, but considerable clinical efforts during the last decade have resulted in novel courses of treatment. These options include chemoradiotherapy, consisting of a continuous infusion of 5-fluorouracil (5-FU), cisplatin (CDDP), and concurrent radiation. Given the substantial inter- and/or intra-individual variation in clinical outcome, future improvements will likely require the incorporation of a novel anticancer drug, pharmacokinetically guided administration of CDDP or 5-FU, and identification of potential responders by patient genetic profiling prior to treatment. In this review, the latest information on incidence, risk factors, biomarkers, therapeutic strategies, and the pharmacokinetically guided or genotype-guided administration of CDDP and 5-FU is summarized for future individualization of esophageal cancer treatment.
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Affiliation(s)
- Toshiyuki Sakaeda
- Center for Integrative Education of Pharmacy Frontier, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan.
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Abstract
Tumours progress through a cascade of events that enable the formation of metastases. Some of the components that are required for this fatal process are well established. Tetraspanins, however, have only recently received attention as both metastasis suppressors and metastasis promoters. This late appreciation is probably due to their capacity to associate with various molecules, which they recruit into special membrane microdomains, and their abundant presence in tumour-derived small vesicles that aid intercellular communication. It is reasonable to assume that differences in the membrane and vesicular web components that associate with individual tetraspanins account for their differing abilities to promote and suppress metastasis.
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Affiliation(s)
- Margot Zöller
- Department of Tumour Cell Biology, University Hospital of Surgery, Heidelberg, Germany.
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Wang JS, Zheng CL, Wang YJ, Wen JF, Ren HZ, Liu Y, Jiang HY. Gene silencing of beta-catenin by RNAi inhibits cell proliferation in human esophageal cancer cells in vitro and in nude mice. Dis Esophagus 2008; 22:151-62. [PMID: 19021690 DOI: 10.1111/j.1442-2050.2008.00875.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
beta-Catenin, which is frequently overexpressed in a variety of human cancers including esophageal cancer, mediates cancer cell proliferation and tumor growth. In the present study, we used a human U6 promoter-driven DNA-template approach to induce short hairpin RNA (shRNA)-triggered RNA interference to silence beta-catenin gene expression in human esophageal squamous cell carcinoma cell line Eca-109, and then evaluated its effects on the proliferation and growth of tumor cells in vitro and in nude mice. beta-Catenin expression levels decreased markedly in Eca-109 cells transfected with a plasmid expressing shRNA for beta-catenin. Downregulation of beta-catenin was concomitantly accompanied by reduction of cyclin D1, colony formation, and growth inhibition of Eca-109 cells in vitro. The mechanism appears to be the G0/G1 phase arrest but not induction of apoptosis. In vivo, treatment of Eca-109 cells with beta-catenin shRNA greatly impeded tumor growth in nude mice. We conclude that plasmid vector-mediated beta-catenin RNA interference holds great promise as a novel treatment on human esophageal cancer with beta-catenin overexpression.
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Affiliation(s)
- Jin-Sheng Wang
- Department of Pathology, Xiangya Medical College, Central South University, Changsha, China
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Huang Y, Sook-Kim M, Ratovitski E. Midkine promotes tetraspanin-integrin interaction and induces FAK-Stat1alpha pathway contributing to migration/invasiveness of human head and neck squamous cell carcinoma cells. Biochem Biophys Res Commun 2008; 377:474-478. [PMID: 18851943 DOI: 10.1016/j.bbrc.2008.09.138] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2008] [Accepted: 09/30/2008] [Indexed: 10/21/2022]
Abstract
The heparin-binding growth factor, MK, promoting tumorigenesis and survival was found to associate with alpha6beta1 integrins. We showed for the first time that MK interacted with TSPAN1 and facilitated the association between TSPAN1 and integrin alpha6beta1 proteins in head and neck squamous cell carcinoma (HNSCC) cells. We found that MK mediated an integrin-dependent tyrosine phosphorylation of FAK and activation of paxillin and Stat1alpha pathways. As result, downstream target genes implicated in cell migration and invasiveness (e.g. MMP-2 and MMP-26) were overexpressed. We observed that RNAi silencing of the critical signaling intermediates led to decrease of MK-induced migration/invasiveness of HNSCC cells. The major finding of this study is a novel MK-triggered signaling mechanism implicated in migration and invasiveness of HNSCC cells.
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Affiliation(s)
- Yiping Huang
- Department of Dermatology, The Johns Hopkins University School of Medicine, David H. Koch Cancer Research Building, Rm 2M05, 1550 Orleans Street, Baltimore, MD 21231, USA
| | - Myoung Sook-Kim
- Department of Dermatology, The Johns Hopkins University School of Medicine, David H. Koch Cancer Research Building, Rm 2M05, 1550 Orleans Street, Baltimore, MD 21231, USA
| | - Edward Ratovitski
- Department of Dermatology, The Johns Hopkins University School of Medicine, David H. Koch Cancer Research Building, Rm 2M05, 1550 Orleans Street, Baltimore, MD 21231, USA.
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Cavalcante RB, Pereira KMA, Nonaka CFW, Nogueira RLM, de Souza LB. Immunohistochemical expression of MMPs 1, 7, and 26 in syndrome and nonsyndrome odontogenic keratocysts. ACTA ACUST UNITED AC 2008; 106:99-105. [PMID: 18585626 DOI: 10.1016/j.tripleo.2007.12.028] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2007] [Revised: 12/06/2007] [Accepted: 12/11/2007] [Indexed: 11/17/2022]
Abstract
OBJECTIVE The objective of this study was to analyze the expression of matrix metalloproteinases (MMPs) 1, 7, and 26 in odontogenic keratocysts (OKCs) associated with Gorlin syndrome (SOKCs) and nonsyndrome OKCs (NSOKCs). STUDY DESIGN Twenty-one SOKCs and 20 NSOKCs were evaluated for epithelial expression of MMP-1, MMP-7, and MMP-26 and for mesenchymal expression of MMP-1 by immunohistochemistry. RESULTS Strong epithelial positivity to MMP-1 was observed in 76% of SOKCs and in 15% of NSOKCs (P < .05). Strong mesenchymal immunoreactivity to MMP-1 was observed in 38% of SOKCs and in 20% of NSOKCs (P > .05). Epithelial immunoreactivity to MMP-7 was strongly positive in 67% of SOKCs and in 40% of NSOKCs (P > .05). For MMP-26, strong positivity was found in 62% of SOKCs, in contrast to 35% of NSOKCs (P > .05). CONCLUSION MMPs-1, -7 and -26 may play important roles in the biology of OKCs. Furthermore, the presence of these proteases at higher levels in SOKCs may help to explain increased OKC aggressiveness associated with nevoid basal cell carcinoma syndrome.
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Yu H, Pan C, Zhao S, Wang Z, Zhang H, Wu W. Resveratrol inhibits tumor necrosis factor-α-mediated matrix metalloproteinase-9 expression and invasion of human hepatocellular carcinoma cells. Biomed Pharmacother 2008; 62:366-72. [DOI: 10.1016/j.biopha.2007.09.006] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2007] [Revised: 09/14/2007] [Accepted: 09/26/2007] [Indexed: 11/28/2022] Open
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Abstract
Esophageal squamous cell carcinoma (ESCC) is the predominant histological subtype of esophageal cancer in Asia, characterized by high incidence and mortality rate. Although significant progress has been made in surgery and adjuvant chemoradiotherapy, the prognosis of the patients with this cancer still remains poor. Investigation into protein alterations that occurred in tumors can provide clues to discover new biomarkers for improving diagnosis and guiding targeted therapy. Hundreds of papers have appeared over the past several decades concerning protein alterations in ESCC. This review summarizes all the dysregulated proteins investigated in the disease from 187 published papers and analyzes their contributions to tumor development and progression. We document protein alterations associated with tumor metastasis and the transition from normal esophageal epithelia to dysplasia in order to reveal the most useful markers for prediction of clinical outcome, early detection, and identification of high-risk patients for targeted therapies. In particular, we discuss the largest and most rigorous studies on prognostic implications of proteins in ESCC, in which cyclin D1, p53, E-cadherin and VEGF appeared to have the strongest evidence as independent predictors of patient outcome.
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Affiliation(s)
- D-C Lin
- State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
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Maehata T, Taniguchi H, Yamamoto H, Nosho K, Adachi Y, Miyamoto N, Miyamoto C, Akutsu N, Yamaoka S, Itoh F. Transcriptional silencing of Dickkopf gene family by CpG island hypermethylation in human gastrointestinal cancer. World J Gastroenterol 2008; 14:2702-14. [PMID: 18461655 PMCID: PMC2709050 DOI: 10.3748/wjg.14.2702] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To clarify alterations of Dickkopfs (Dkks) and Kremen2 (Krm2) in gastrointestinal cancer.
METHODS: We investigated the expression profiles and epigenetic alterations of Dkks and Krm2 genes in gastrointestinal cancer using RT-PCR, tissue microarray analysis, and methylation specific PCR (MSP). Cancer cells were treated with the demethylating agent and/or histone deacetylase inhibitor. WST-8 assays and in vitro invasion assays after treatment with specific siRNA for those genes were performed.
RESULTS: Dkks and Krm2 expression levels were reduced in a certain subset of the gastrointestinal cancer cell lines and cancer tissues. This was correlated with promoter hypermethylation. There were significant correlations between Dkks over-expression levels and beta-catenin over-expression in colorectal cancer. In colorectal cancers with beta-catenin over-expression, Dkk-1 expression levels were significantly lower in those with lymph node metastases than in those without. Down-regulation of Dkks expression by siRNA resulted in a significant increase in cancer cell growth and invasiveness in vitro.
CONCLUSION: Down-regulation of the Dkks associated to promoter hypermethylation appears to be frequently involved in gastrointestinal tumorigenesis.
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Taniguchi H, Yamamoto H, Akutsu N, Nosho K, Adachi Y, Imai K, Shinomura Y. Transcriptional silencing of hedgehog-interacting protein by CpG hypermethylation and chromatic structure in human gastrointestinal cancer. J Pathol 2007; 213:131-9. [PMID: 17724792 DOI: 10.1002/path.2216] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Hedgehog-interacting protein (HHIP) was identified as a putative antagonist of the Hh pathway and as a target of Hh signalling. Our aim was to clarify the expression profiles and epigenetic alterations of the HHIP gene in gastrointestinal cancer. The expression and promoter epigenetic status of HHIP in cancer cell lines and freshly resected gastrointestinal cancer tissues were examined using RT-PCR, tissue microarray analysis, methylation-specific PCR, and chromatin immunoprecipitation assay. Cells were treated with the demethylating agent 5-aza-2'-deoxycytidine and/or histone deacetylase inhibitor trichostatin A. WST-8 assays and in vitro invasion assays after treatment with HHIP-specific siRNA were performed. HHIP expression levels were reduced in most of the gastrointestinal cancer cell lines and in a certain subset of cancer tissues, and these were correlated with promoter hypermethylation. A heterochromatic structure characterized by neither acetylated H3 nor acetylated H4, and histone H3 lysine 9 hypermethylation and histone H3 lysine 4 hypomethylation was observed in cancer cells in which the HHIP gene was aberrantly silenced. On the other hand, overexpression of the HHIP gene was also found in some cancer tissues and there were significant correlations between protein expression levels of HHIP and those of Sonic hedgehog (Shh), Indian hedgehog, Patched, and glioma-associated oncogene homologue-1. An association was found between lymph node metastasis and HHIP silencing in colorectal cancer tissues with strong Shh expression and between advanced TNM stage and HHIP silencing in diffuse-type gastric cancer tissues with strong Shh expression. Down-regulation of HHIP expression by siRNA resulted in a significant increase in colon cancer cell growth and invasion in vitro. Silencing of the HHIP gene due to hypermethylation and chromatin remodelling appears to be frequently involved in gastrointestinal tumourigenesis.
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Affiliation(s)
- H Taniguchi
- First Department of Internal Medicine, Sapporo Medical University, Sapporo 060-8543, Japan
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37
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Bister V, Skoog T, Virolainen S, Kiviluoto T, Puolakkainen P, Saarialho-Kere U. Increased expression of matrix metalloproteinases-21 and -26 and TIMP-4 in pancreatic adenocarcinoma. Mod Pathol 2007; 20:1128-40. [PMID: 17873896 DOI: 10.1038/modpathol.3800956] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Pancreatic adenocarcinoma is known for early aggressive local invasion, high metastatic potential, and a low 5-year survival rate. Matrix metalloproteinases (MMPs) play important roles in tumor growth and invasion. Earlier studies on pancreatic cancer have found increased expression of certain MMPs to correlate with poorer prognosis, short survival time or presence of metastases. We studied the expression of MMP-21, -26, and tissue inhibitor of matrix metalloproteinases (TIMP)-4 in 50 tissue samples, including 25 adenocarcinomas, seven other malignant pancreatic tumors, and 18 control samples of non-neoplastic pancreatic tissue with immunohistochemistry. The regulation of MMP-21, -26, and TIMP-4 mRNAs by cytokines was studied with RT-PCR in pancreatic cancer cell lines PANC-1, BxPC-3, and AsPC-1. MMP-21, -26, and TIMP-4 were detected in cancer cells in 64, 40, and 60% of tumors, respectively. MMP-21 expressed in well-differentiated cancer cells and occasional fibroblasts, like TIMP-4, tended to diminish in intensity from grade I to grade III tumors. Patients with metastatic lymph nodes had increased expression of MMP-26 in actual tumor samples. All cultured cancer cell lines expressed MMP-21 basally at low levels, and presence of the protein was confirmed immunohistochemically in cultured cells. MMP-21 expression was induced by epidermal growth factor (EGF) in PANC-1 cells. MMP-26 was neither expressed basally nor induced by tumor necrosis factor alpha, transforming growth factor beta-1 (TGFbeta1), EGF, or interferon gamma. Basal TIMP-4 expression was lowest in the poorly differentiated cancer cell line PANC-1 compared to better-differentiated BxPC-3 and AsPC-1 cells. TIMP-4 expression was induced by TGFbeta1 in PANC-1 cells and by EGF in BxPC-3 cells. Our findings suggest that MMP-21 is not a marker of invasiveness, but rather of differentiation, in pancreatic cancer and it may be upregulated by EGF. The putative role of MMP-26 as a marker of metastases warrants further studies. Unlike other TIMPs, TIMP-4 was not upregulated in relation to aggressiveness of pancreatic cancer.
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Affiliation(s)
- Ville Bister
- Department of Dermatology, Helsinki University Central Hospital and Biomedicum Helsinki, University of Helsinki, Helsinki, Finland
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Herszenyi L, Hritz I, Pregun I, Sipos F, Juhasz M, Molnar B, Tulassay Z. Alterations of glutathione S-transferase and matrix metalloproteinase-9 expressions are early events in esophageal carcinogenesis. World J Gastroenterol 2007; 13:676-82. [PMID: 17278189 PMCID: PMC4065999 DOI: 10.3748/wjg.v13.i5.676] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate the role of glutathione S-transferase (GST) and matrix metalloproteinase-9 (MMP-9) expressions in the development and progression of reflux esophagitis-Barrett's metaplasia-dysplasia-adenocarcinoma sequence in the esophagus. METHODS GST and MMP-9 expressions were analyzed in 51 paraffin-embedded tissue samples by immunohistochemistry including patients with reflux esophagitis (n = 7), Barrett's metaplasia (n = 14), Barrett and esophagitis (n = 8), Barrett and dysplasia (n = 7), esophageal adenocarcinoma (n = 8) and a control group without any histological changes (n = 7). Immunostaining was determined semiquantitatively. Statistical analysis with one-way ANOVA, LSD test and correlation analysis were performed. P value of < 0.05 was considered significant. RESULTS GST expression was significantly higher while MMP-9 expression was significantly lower in control group compared to Barrett's metaplasia and the other groups. No major changes were observed between Barrett, esophagitis, and Barrett and concomitant esophagitis. Barrett and concomitant dysplasia, and adenocarcinoma revealed a significant lower expression of GST and higher levels of MMP-9 compared to all other groups. Adenocarcinoma showed almost no expression of GST and significantly higher levels of MMP-9 than Barrett and concomitant dysplasia. Alterations of GST and MMP-9 were inversely correlated (r = -0.82). CONCLUSION Decreased GST and increased expression of MMP-9 in Barrett's metaplasia-dysplasia-adenocarcinoma sequence as compared to normal tissue suggest their association with esophageal tumorigenesis. Loss of GST and gain of MMP-9 in Barrett with dysplasia compared to non-dysplastic metaplasia indicate that these alterations may be early events in carcinogenesis. Quantification of these parameters in Barrett's esophagus might be useful to identify patients at higher risk for progression to cancer.
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Affiliation(s)
- Laszlo Herszenyi
- 2nd Department of Medicine, Semmelweis University, H-1088 Budapest, Szentkiralyi u. 46, Hungary.
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Catania JM, Chen G, Parrish AR. Role of matrix metalloproteinases in renal pathophysiologies. Am J Physiol Renal Physiol 2006; 292:F905-11. [PMID: 17190907 DOI: 10.1152/ajprenal.00421.2006] [Citation(s) in RCA: 281] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Matrix metalloproteinases (MMPs) are a large family of proteinases that remodel extracellular matrix (ECM) components and cleave a number of cell surface proteins. MMP activity is regulated via a number of mechanisms, including inhibition by tissue inhibitors of metalloproteinases (TIMPs). Originally thought to cleave only ECM proteins, MMP substrates are now known to include signaling molecules (growth factor receptors) and cell adhesion molecules. Recent data suggest a role for MMPs in a number of renal pathophysiologies, both acute and chronic. This review will focus on the expression and localization of MMPs and TIMPs in the kidney, as well as summarizing the current information linking these proteins to acute kidney injury, glomerulosclerosis/tubulointerstitial fibrosis, chronic allograft nephropathy, diabetic nephropathy, polycystic kidney disease, and renal cell carcinoma.
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Affiliation(s)
- J M Catania
- Department of Systems Biology and Translational Medicine, College of Medicine, Texas A&M Health Science Center, College Station, Texas 77843, USA
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Beaucher M, Hersperger E, Page-McCaw A, Shearn A. Metastatic ability of Drosophila tumors depends on MMP activity. Dev Biol 2006; 303:625-34. [PMID: 17239363 DOI: 10.1016/j.ydbio.2006.12.001] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2006] [Revised: 11/14/2006] [Accepted: 12/01/2006] [Indexed: 12/30/2022]
Abstract
We analyzed how cells from tumors caused by mutations in either lgl or brat use matrix metalloproteinases (MMPs) to facilitate metastasis in Drosophila. MMP1 accumulation is dramatically increased in lgl larval imaginal discs compared to both wild type and brat mutants. Removal of Mmp1 gene activity in lgl brain tumor cells reduced their frequency of ovarian micro-metastases after transplantation; whereas, removal of Mmp1 gene activity in brat tumor cells had no such effect. Host ovaries showed increased Mmp1 gene expression in response to transplantation of brat tumors but not of lgl tumors. Reduction of MMP activity in host ovaries by ectopic expression of TIMP significantly reduced both lgl and brat metastases in that organ. These results highlight the mechanisms that lgl and brat tumor cells use to metastasize. Our interpretation of these data is that secretion of MMP1 from lgl tumor cells facilitates their metastasis, while secretion of MMP1 from host ovaries facilitates brat tumor metastasis. This study is the first demonstration that Drosophila tumors utilize MMP activity to metastasize.
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Affiliation(s)
- Michelle Beaucher
- Department of Biology, The Johns Hopkins University, Baltimore, MD 21218, USA
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42
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Savinov AY, Remacle AG, Golubkov VS, Krajewska M, Kennedy S, Duffy MJ, Rozanov DV, Krajewski S, Strongin AY. Matrix Metalloproteinase 26 Proteolysis of the NH2-Terminal Domain of the Estrogen Receptor β Correlates with the Survival of Breast Cancer Patients. Cancer Res 2006; 66:2716-24. [PMID: 16510592 DOI: 10.1158/0008-5472.can-05-3592] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Estrogens have many cellular functions, including their interactions with estrogen receptors alpha and beta (ERalpha and ERbeta). Earlier, we determined that the estrogen-ER complex stimulates the transcriptional activity of the matrix metalloproteinase 26 (MMP-26) gene promoter. We then determined that ERbeta is susceptible to MMP-26 proteolysis whereas ERalpha is resistant to the protease. MMP-26 targets the NH(2)-terminal region of ERbeta coding for the divergent NH(2)-terminal A/B domain that is responsible for the ligand-independent transactivation function. As a result, MMP-26 proteolysis generates the COOH-terminal fragments of ERbeta. Immunohistochemical analysis of tissue microarrays derived from 121 cancer patients corroborated these data and revealed an inverse correlation between the ERalpha-dependent expression of MMP-26 and the levels of the intact ERbeta in breast carcinomas. MMP-26 is not expressed in normal mammary epithelium. The levels of MMP-26 are strongly up-regulated in ductal carcinoma in situ (DCIS). In the course of further disease progression through stages I to III, the expression of MMP-26 decreases. In contrast to many tumor-promoting MMPs, the expression of MMP-26 in DCIS correlated with a longer patient survival. Our data suggest the existence of an MMP-26-mediated intracellular pathway that targets ERbeta and that MMP-26, a novel and valuable cancer marker, contributes favorably to the survival of the ERalpha/beta-positive cohort of breast cancer patients.
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Leinonen T, Pirinen R, Böhm J, Johansson R, Ropponen K, Kosma VM. Expression of matrix metalloproteinases 7 and 9 in non-small cell lung cancer. Lung Cancer 2006; 51:313-21. [PMID: 16423426 DOI: 10.1016/j.lungcan.2005.11.002] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2005] [Revised: 11/14/2005] [Accepted: 11/15/2005] [Indexed: 10/25/2022]
Abstract
Matrix metalloproteinases (MMPs) have been shown to have a significant role in determining cancer cell behaviour. The present study was undertaken to analyze the expression and prognostic value of MMP-7 and MMP-9 in non-small cell lung cancer (NSCLC). The relationship of MMP-7 with beta-catenin was also evaluated. The study consists of 212 patients with resected NSCLC. Tumour samples were stained immunohistochemically, and the expression of MMP-7 and MMP-9 was evaluated in both tumour cells and peritumoural stromal tissue. The results were compared to clinicopathological factors of the patients. A high staining of MMP-7 and MMP-9 in tumour cells was noted in 62 (30%) and 113 (57%) cases, respectively. Expression of MMP-7 was noted more often in adenocarcinomas than in other histological types (p=0.022). High cancer cell associated MMP-7 was related to lower T-factor (p=0.037), better tumour differentiation (p=0.005) and normal beta-catenin expression in tumour cells (p=0.001). A high MMP-9 expression in tumour cells was related to poor tumour differentiation (p=0.016). The stromal signal for MMP-9 was observed in 58 (32%) cases and was linked with higher tumour grade (p=0.031). In survival analyses the significant predictors of survival were histological type of tumour and tumour stage (p=0.0009 and 0.0012, respectively). MMP-7 or MMP-9 signals were not related to patient's outcome. The results show that high MMP-9 expression indicates aggressive, and high MMP-7 less aggressive tumour behaviour in NSCLC. However, MMP-7 and MMP-9 expressions had no prognostic value in NSCLC.
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Affiliation(s)
- Tero Leinonen
- Department of Pathology and Forensic Medicine, University of Kuopio and Kuopio University Hospital, P.O. Box 1627, FIN-70211 Kuopio, Finland
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Ahokas K, Karjalainen-Lindsberg ML, Sihvo E, Isaka K, Salo J, Saarialho-Kere U. Matrix Metalloproteinases 21 and 26 Are Differentially Expressed in Esophageal Squamous Cell Cancer. Tumour Biol 2006; 27:133-41. [PMID: 16641547 DOI: 10.1159/000092774] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2005] [Accepted: 10/24/2005] [Indexed: 01/17/2023] Open
Abstract
Matrix metalloproteinase 21 (MMP-21) and MMP-26 (matrilysin-2) are the two newest members of the human MMP gene family that have both been suggested to play an important role in epithelial tumor progression and to be regulated via the Wnt signaling pathway. We studied their expression in 34 esophageal squamous cell carcinomas and non-neoplastic epithelium. MMP-21 protein was detected in cancer cells and inflammatory cells at the invasive front. Its expression was associated with invasion, inflammation, apoptotic and well-differentiated areas of the tumors, but not with cell proliferation. Unlike MMP-21, MMP-26 protein was already upregulated in incipient invasion and its expression associated with regions of low differentiation being more sporadic at the invasive front. MMP-21 was detected basally in KYSE-30 and OE21 esophageal squamous cell carcinoma cells, while MMP-26 was absent. None of the several cytokines and matrices tested were capable of consistently upregulating MMP-21 or MMP-26 mRNA expression in these two cell lines. Our results suggest that during esophageal tumorigenesis, MMP-21 and MMP-26 have different, unique expression patterns both being tightly regulated and induced in the vicinity of inflammation. MMP-21 may provide a marker for differentiating tumor areas. The putative role of MMP-26 as a marker of dysplasia and incipient invasion warrants further studies.
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Affiliation(s)
- Katja Ahokas
- Department of Dermatology, Helsinki University Central Hospital, and Biomedicum Helsinki, University of Helsinki, Helsinki, Finland
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Ahokas K, Skoog T, Suomela S, Jeskanen L, Impola U, Isaka K, Saarialho-Kere U. Matrilysin-2 (matrix metalloproteinase-26) is upregulated in keratinocytes during wound repair and early skin carcinogenesis. J Invest Dermatol 2005; 124:849-56. [PMID: 15816845 DOI: 10.1111/j.0022-202x.2005.23640.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Matrilysin-2 (matrix metalloproteinase (MMP)-26) is a small protein of the MMP family expressed in some epithelial carcinomas and normal tissues. We studied its role in benign skin disorders characterized by epithelial proliferation, in wound repair, skin cancer, and regulation in keratinocyte (KC) cultures. MMP-26 is expressed by laminin-5-positive KC in the migrating area during wound repair, in benign skin disorders characterized by inflammation and microdisruptions of basement membrane, but in intact skin only in hair follicles. It was detected in occasional atypical KC in pre-malignant lesions but not in basal cell cancer islands. Although MMP-26 was expressed in grades I and II squamous cell cancers (SCC), it was not present in dedifferentiated grade III tumors. MMP-26 was neither co-expressed with its close homologue matrilysin-1 nor with the proliferation marker Ki-67. But in tissue samples it either co-localized or was detected in adjacent cells of same regions with the tumor suppressor p16. In KC and HaCaT cell cultures, 12-phorbol-13-myristate-acetate, epidermal growth factor, tumor necrosis factor-alpha, transforming growth factor-beta1, interleukin-1 (IL-1)beta, IL-6, insulin-like growth factor, gamma-IFN, retinoic acid, dexamethasone, four matrices or ras-transformation were unable to upregulate MMP-26 expression. The expression pattern of MMP-26 suggests that it may be upregulated in basal KC even without tumorigenesis because of altered cell-matrix interactions and inflammation and, unlike most MMP, becomes downregulated during histological dedifferentiation of SCC. Thus, lack of MMP-26 in SCC could be a marker of aggressive growth.
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Affiliation(s)
- Katja Ahokas
- Department of Dermatology, Helsinki University Central Hospital, Biomedicum Helsinki, Helsinki, Finland
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McQuibban GA, Gong JH, Tam EM, McCulloch CA, Clark-Lewis I, Overall CM. Inflammation dampened by gelatinase A cleavage of monocyte chemoattractant protein-3. Crit Rev Biochem Mol Biol 2000; 48:222-72. [PMID: 10947989 DOI: 10.3109/10409238.2013.770819] [Citation(s) in RCA: 536] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Tissue degradation by the matrix metalloproteinase gelatinase A is pivotal to inflammation and metastases. Recognizing the catalytic importance of substrate-binding exosites outside the catalytic domain, we screened for extracellular substrates using the gelatinase A hemopexin domain as bait in the yeast two-hybrid system. Monocyte chemoattractant protein-3 (MCP-3) was identified as a physiological substrate of gelatinase A. Cleaved MCP-3 binds to CC-chemokine receptors-1, -2, and -3, but no longer induces calcium fluxes or promotes chemotaxis, and instead acts as a general chemokine antagonist that dampens inflammation. This suggests that matrix metalloproteinases are both effectors and regulators of the inflammatory response.
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Affiliation(s)
- G A McQuibban
- Department of Biochemistry and Molecular Biology, Biomedical Research Centre, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
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