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Kast RE. The OSR9 Regimen: A New Augmentation Strategy for Osteosarcoma Treatment Using Nine Older Drugs from General Medicine to Inhibit Growth Drive. Int J Mol Sci 2023; 24:15474. [PMID: 37895152 PMCID: PMC10607234 DOI: 10.3390/ijms242015474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 10/13/2023] [Accepted: 10/19/2023] [Indexed: 10/29/2023] Open
Abstract
As things stand in 2023, metastatic osteosarcoma commonly results in death. There has been little treatment progress in recent decades. To redress the poor prognosis of metastatic osteosarcoma, the present regimen, OSR9, uses nine already marketed drugs as adjuncts to current treatments. The nine drugs in OSR9 are: (1) the antinausea drug aprepitant, (2) the analgesic drug celecoxib, (3) the anti-malaria drug chloroquine, (4) the antibiotic dapsone, (5) the alcoholism treatment drug disulfiram, (6) the antifungal drug itraconazole, (7) the diabetes treatment drug linagliptin, (8) the hypertension drug propranolol, and (9) the psychiatric drug quetiapine. Although none are traditionally used to treat cancer, all nine have attributes that have been shown to inhibit growth-promoting physiological systems active in osteosarcoma. In their general medicinal uses, all nine drugs in OSR9 have low side-effect risks. The current paper reviews the collected data supporting the role of OSR9.
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Peripheral Inflammatory Indexes Neutrophil/Lymphocyte Ratio (NLR) and Red Cell Distribution Width (RDW) as Prognostic Biomarkers in Advanced Solitary Fibrous Tumour (SFT) Treated with Pazopanib. Cancers (Basel) 2022; 14:cancers14174186. [PMID: 36077723 PMCID: PMC9454647 DOI: 10.3390/cancers14174186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/15/2022] [Accepted: 08/24/2022] [Indexed: 11/17/2022] Open
Abstract
Pazopanib was assessed prospectively in the GEIS-32 phase II study (NCT02066285) on advanced solitary fibrous tumour (SFT), resulting in a longer progression-free survival (PFS) and overall survival (OS) compared with historical controls treated with chemotherapy. A retrospective analysis of peripheral inflammatory indexes in patients enrolled into GEIS-32 was performed to evaluate their prognostic and predictive value. Patients received pazopanib 800 mg/day as the first antiangiogenic line. The impacts of baseline neutrophil/lymphocyte ratio (NLR), platelet/lymphocyte ratio (PLR), and red cell distribution width (RDW) on PFS, OS, and Choi response were evaluated by univariate and multivariate analysis. Metastasis-free interval (MFI), mitotic count, and ECOG were also included as potential prognostic factors. Sixty-seven SFT patients, enrolled in this study, showed a median age of 63 years and a female/male distribution of 57/43. The median follow-up from treatment initiation was 16.8 months. High baseline NLR, PLR, and standardised RDW were significantly associated with worse PFS and OS. NLR, RDW, MFI, and mitotic count were independent variables for PFS, while RDW and ECOG were independent for OS. Further, NLR and mitotic count were independent factors for Choi response. High baseline NLR and RDW values were independent prognostic biomarkers for worse outcome in advanced SFT patients treated with pazopanib.
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Reader J, Harper AK, Legesse T, Staats PN, Goloubeva O, Rao GG, Fulton A, Roque DM. EP4 and Class III β-Tubulin Expression in Uterine Smooth Muscle Tumors: Implications for Prognosis and Treatment. Cancers (Basel) 2019; 11:cancers11101590. [PMID: 31635323 PMCID: PMC6826612 DOI: 10.3390/cancers11101590] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 10/10/2019] [Accepted: 10/12/2019] [Indexed: 02/07/2023] Open
Abstract
The microtubule-stabilizing agent docetaxel in combination with gemcitabine represents one of the most effective regimens against the aggressive gynecologic tumor leiomyosarcoma (LMS). Upregulation of class III β-tubulin has previously been shown to confer taxane resistance in a variety of human cancers. Prostaglandin E2 receptor EP4 is linked to progression of a variety of human cancers and may represent a novel target for tumor inhibition in LMS. We evaluated the hypotheses that EP4 and class III β-tubulin have increased expression in LMS in comparison to normal myometrium or benign tumors and that expression of class III β-tubulin correlates with resistance to taxanes and poor clinical outcome. Gene expression was examined using TCGA data and correlated with clinicopathologic outcome which demonstrated that class III β-tubulin is more highly expressed in more aggressive sarcomas with EP4 being widely expressed in all subtypes of sarcoma. Immunohistochemistry for EP4 and class III β-tubulin was performed on patients with LMS, leiomyomatosis/STUMP, leiomyoma, and normal myometrium. Expression of EP4 and class III β-tubulin were characterized for cell lines SK-UT-1, SK-UT-1B, and PHM-41 and these cell lines were treated with docetaxel alone and in combination with EP4 inhibitors. In taxane-resistant cell lines that overexpress class III β-tubulin and EP4, treatment with EP4 inhibitor resulted in at least 2-fold sensitization to docetaxel. Expression of class III β-tubulin and EP4 in LMS may identify patients at risk of resistance to standard chemotherapies and candidates for augmentation of therapy through EP4 inhibition.
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Affiliation(s)
- Jocelyn Reader
- Division of Gynecologic Oncology, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD 21201, USA.
| | - Amy K Harper
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
| | - Teklu Legesse
- Department of Pathology, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
| | - Paul N Staats
- Department of Pathology, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
| | - Olga Goloubeva
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
| | - Gautam G Rao
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD 21201, USA.
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
| | - Amy Fulton
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD 21201, USA.
- Department of Pathology, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
- Baltimore Veterans Affairs Medical Center, Baltimore, MD 21201, USA.
| | - Dana M Roque
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD 21201, USA.
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
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Wang S, Gao H, Zuo J, Gao Z. Cyclooxygenase-2 expression correlates with development, progression, metastasis, and prognosis of osteosarcoma: a meta-analysis and trial sequential analysis. FEBS Open Bio 2019; 9:226-240. [PMID: 30761249 PMCID: PMC6356183 DOI: 10.1002/2211-5463.12560] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 10/16/2018] [Accepted: 11/07/2018] [Indexed: 11/12/2022] Open
Abstract
Cyclooxygenase‐2 (COX‐2), a key enzyme in arachidonic acid metabolism, is involved in several cancers, including osteosarcoma. The prognostic significance of COX‐2 in osteosarcoma remains controversial. This study was to analyze the potential clinical and prognostic effects of COX‐2 protein expression in patients with osteosarcoma. Eligible articles were searched via online databases. The combined odds ratios (ORs) or hazard ratios (HRs) with their 95% confidence intervals (95% CIs) were calculated using the random‐effects model. Trial sequential analysis (TSA) was applied to analyze the required information size and determine the reliability of the evidence. Twenty‐three studies on COX‐2 expression were identified, which included a total of 1084 patients with malignant osteosarcoma and 247 patients with benign osteochondroma. COX‐2 protein expression in osteosarcoma was higher than in benign osteochondroma (OR = 7.66, P < 0.001). COX‐2 expression was not correlated with age, gender, tumor location, cancer histology, or necrosis (P > 0.1), but was significantly associated with tumor grade (high grade vs. low grade: OR = 4.81, P < 0.001), clinical stage (stage 3–4 vs. stage 1–2: OR = 4.89, P < 0.001), and metastasis (yes vs. no: OR = 3.53, P < 0.001). Based on TSA results, we suggest that additional studies are not required to examine osteosarcoma vs. benign osteochondroma, tumor grade, clinical stage, or metastasis. No heterogeneity was observed in these analyses. COX‐2 expression is linked to poor prognosis in metastasis‐free survival, overall survival, and relapse‐free survival, as indicated by multivariate analysis. Therefore, the expression of COX‐2 may correlate with the development, progression, metastasis, and poor prognosis of osteosarcoma.
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Affiliation(s)
- Shengqun Wang
- Orthopaedics China-Japan Union Hospital of Jilin University China
| | - Hongwei Gao
- Orthopaedics The Affiliated Hospital to Changchun University of Chinese Medicine Jilin China
| | - Jianlin Zuo
- Orthopaedics China-Japan Union Hospital of Jilin University China
| | - Zhongli Gao
- Orthopaedics China-Japan Union Hospital of Jilin University China
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Hu Z, Yang Y, Zhao Y, Huang Y. The prognostic value of cyclooxygenase-2 expression in patients with esophageal cancer: evidence from a meta-analysis. Onco Targets Ther 2017; 10:2893-2901. [PMID: 28652771 PMCID: PMC5476766 DOI: 10.2147/ott.s134599] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Published studies have investigated the prognostic role of cyclooxygenase-2 (COX-2) expression in patients with esophageal cancer (EC), but the result remains controversial. Thus, this meta-analysis was conducted to comprehensively evaluate the impact of COX-2 expression on the prognostic value in patients with EC. Relevant studies were identified from PubMed, EMBASE, and Web of Science databases. Studies that detected the COX-2 expression by immunohistochemistry and evaluated the relationship between COX-2 expression and overall survival (OS) or clinicopathological parameters were used in our analysis. The summary hazard ratios (HRs) or odds ratios were calculated to assess the risk or hazard association. A total of 25 studies, which included 2,465 patients, were included in our meta-analysis. Our analysis suggested that overexpression of COX-2 was associated with poor OS (HR =1.60, 95% CI =1.32–1.94, P<0.001). Subgroup analyses by race, percentage of high/positive COX-2 expression, histology type, treatment, and sample size all suggested significant association. Moreover, overexpression of COX-2 was significantly associated with depth of invasion, lymph node metastasis, distant metastasis, and TNM stage. This meta-analysis suggested that overexpression of COX-2 might serve as a prognostic biomarker for EC. Large well-designed prospective studies are needed to confirm our conclusion.
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Affiliation(s)
| | - Yanlong Yang
- Department of Thoracic Surgery I, The Third Affiliated Hospital of Kunming Medical University (Yunnan Cancer Hospital)
| | - Yonghe Zhao
- Department of Pathology, The Forensic School of Kunming Medical University
| | - Yunchao Huang
- Department of Thoracic Surgery I, The Third Affiliated Hospital of Kunming Medical University (Yunnan Cancer Hospital).,Cancer Research Institute of Yunnan Province, The Third Affiliated Hospital of Kunming Medical University (Yunnan Cancer Hospital), Kunming, Yunnan Province, People's Republic of China
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Liu J, Wu J, Zhou L, Pan C, Zhou Y, Du W, Chen JM, Zhu X, Shen J, Chen S, Liu RY, Huang W. ZD6474, a new treatment strategy for human osteosarcoma, and its potential synergistic effect with celecoxib. Oncotarget 2016; 6:21341-52. [PMID: 26050198 PMCID: PMC4673269 DOI: 10.18632/oncotarget.4179] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2014] [Accepted: 05/12/2015] [Indexed: 12/23/2022] Open
Abstract
ZD6474, a small molecule VEGFR and EGFR tyrosine kinase inhibitor, has been considered as a promising tumor-targeted drug in various malignancies. EGFR and cyclooxygenase-2 (COX-2) were found overexpressed in osteosarcoma in previous reports, so here we tried to explore the anti-osteosarcoma effect of ZD6474 alone or combination with celecoxib, a COX-2 inhibitor. The data demonstrated that ZD6474 inhibited the growth of osteosarcoma cells, and promoted G1-phase cell cycle arrest and apoptosis by inhibiting the activity of EGFR tyrosine kinase, and consequently suppressing its downstream PI3k/Akt and MAPK/ERK pathway. Additionally, daily administration of ZD6474 produced a dose-dependent inhibition of tumor growth in nude mice. Celecoxib also significantly inhibited the growth of osteosarcoma cells in dose-dependent manner, while combination of ZD6474 and celecoxib displayed a synergistic or additive antitumor effect on osteosarcoma in vitro and in vivo. The possible molecular mechanisms to address the synergism are likely that ZD6474 induces the down-regulation of COX-2 expression through inhibiting ERK phosphorylation, while celecoxib promotes ZD6474-directed inhibition of ERK phosphorylation. In conclusion, ZD6474 exerts direct anti-proliferative effects on osteosarcoma cells, and the synergistic antitumor effect of the combination of ZD6474 with celecoxib may indicate a new strategy of the combinative treatment of human osteosarcoma.
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Affiliation(s)
- Jiani Liu
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China.,Department of Oncology, Jingzhou Hospital, Tongji Medical College of Huazhong University of Science and Technology, Jingzhou, Hubei, China
| | - Jiangxue Wu
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Ling Zhou
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Changchuan Pan
- Medical Oncology, Sichuan Cancer Hospital and Institute, Second People's Hospital of Sichuan Province, Chengdu, China
| | - Yi Zhou
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Wuying Du
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Jie-Min Chen
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Xiaofeng Zhu
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Jingnan Shen
- Musculoskeletal Oncology Department, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Shuai Chen
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Ran-Yi Liu
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Wenlin Huang
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China.,Guangdong Provincial Key Laboratory of Tumor Targeted Drugs and Guangzhou Enterprise Key Laboratory of Gene Medicine, Guangzhou Doublle Bioproducts Co. Ltd., Guangzhou, China
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Qian M, Yang X, Li Z, Jiang C, Song D, Yan W, Liu T, Wu Z, Kong J, Wei H, Xiao J. P50-associated COX-2 extragenic RNA (PACER) overexpression promotes proliferation and metastasis of osteosarcoma cells by activating COX-2 gene. Tumour Biol 2015; 37:3879-86. [PMID: 26476537 DOI: 10.1007/s13277-015-3838-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Accepted: 07/22/2015] [Indexed: 12/20/2022] Open
Abstract
P50-associated cyclooxygenase-2 (COX-2) extragenic RNA (PACER) is a novel long noncoding RNA that has been found to activate the COX-2 gene, which may function as an oncogene in osteosarcoma. However, the role of PACER and the relationship between PACER and COX-2 in osteosarcoma progression have been unknown until now. Here, we examined the expression levels of PACER in clinical tumor samples and human osteosarcoma cell lines, assessed the functions of PACER in osteosarcoma cell proliferation and invasion, and then explored the mechanism of PACER dysregulation in osteosarcoma. The results showed that PACER was overexpressed in osteosarcoma tissues and cell lines compared with normal tissues and osteoblasts, respectively. PACER knockdown inhibited the proliferation and invasion of human osteosarcoma cells. Downregulation of PACER significantly suppressed the expression of COX-2, and the effects of PACER on cell proliferation and invasion were rescued by COX-2 overexpression. Furthermore, COX-2 activation by PACER was NF-κB-dependent. The regulation of PACER by CCCTC-binding factor (CTCF) was associated with DNA methylation status. Taken together, these findings suggest that PACER promotes proliferation and metastasis of osteosarcoma cells by activating the COX-2 gene and its own expression was influenced by DNA methylation.
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Affiliation(s)
- Ming Qian
- Spine Tumor Center, Changzheng Hospital, Second Military Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China
| | - Xinghai Yang
- Spine Tumor Center, Changzheng Hospital, Second Military Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China
| | - Zhenxi Li
- Spine Tumor Center, Changzheng Hospital, Second Military Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China
| | - Cong Jiang
- Spine Tumor Center, Changzheng Hospital, Second Military Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China
| | - Dianwen Song
- Spine Tumor Center, Changzheng Hospital, Second Military Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China
| | - Wangjun Yan
- Spine Tumor Center, Changzheng Hospital, Second Military Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China
| | - Tielong Liu
- Spine Tumor Center, Changzheng Hospital, Second Military Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China
| | - Zhipeng Wu
- Spine Tumor Center, Changzheng Hospital, Second Military Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China
| | - Jinhai Kong
- Spine Tumor Center, Changzheng Hospital, Second Military Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China
| | - Haifeng Wei
- Spine Tumor Center, Changzheng Hospital, Second Military Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China.
| | - Jianru Xiao
- Spine Tumor Center, Changzheng Hospital, Second Military Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China.
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8
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Han JA, Kim JY, Kim JI. Analysis of gene expression in cyclooxygenase-2-overexpressed human osteosarcoma cell lines. Genomics Inform 2014; 12:247-53. [PMID: 25705166 PMCID: PMC4330262 DOI: 10.5808/gi.2014.12.4.247] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 11/09/2014] [Accepted: 11/10/2014] [Indexed: 01/03/2023] Open
Abstract
Osteosarcoma is the most common primary bone tumor, generally affecting young people. While the etiology of osteosarcoma has been largely unknown, recent studies have suggested that cyclooxygenase-2 (COX-2) plays a critical role in the proliferation, migration, and invasion of osteosarcoma cells. To understand the mechanism of action of COX-2 in the pathogenesis of osteosarcoma, we compared gene expression patterns between three stable COX-2-overexpressing cell lines and three control cell lines derived from U2OS human osteosarcoma cells. The data showed that 56 genes were upregulated, whereas 20 genes were downregulated, in COX-2-overexpressed cell lines, with an average fold-change > 1.5. Among the upregulated genes, COL1A1, COL5A2, FBN1, HOXD10, RUNX2, and TRAPPC2are involved in bone and skeletal system development, while DDR2, RAC2, RUNX2, and TSPAN31are involved in the positive regulation of cell proliferation. Among the downregulated genes, HIST1H1D, HIST1H2AI, HIST1H3H, and HIST1H4C are involved in nucleosome assembly and DNA packaging. These results may provide useful information to elucidate the molecular mechanism of the COX-2-mediated malignant phenotype in osteosarcoma.
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Affiliation(s)
- Jeong A Han
- Department of Biochemistry and Molecular Biology, Kangwon National University School of Medicine, Chuncheon 200-701, Korea
| | - Ji-Yeon Kim
- Department of Internal Medicine, Seoul National University Hospital, Seoul 110-744, Korea
| | - Jong-Il Kim
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, Seoul 110-799, Korea. ; Department of Biomedical Sciences, Seoul National University Graduate School, Seoul 110-799, Korea. ; Genomic Medicine Institute, Medical Research Center, Seoul National University, Seoul 110-799, Korea
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Bhat IA, Rasool R, Qasim I, Masoodi KZ, Paul SA, Bhat BA, Ganaie FA, Aziz SA, Shah ZA. COX-2 overexpression and -8473 T/C polymorphism in 3' UTR in non-small cell lung cancer. Tumour Biol 2014; 35:11209-18. [PMID: 25113252 DOI: 10.1007/s13277-014-2420-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Accepted: 07/29/2014] [Indexed: 01/07/2023] Open
Abstract
A new class of compounds targeting cyclooxygenase 2 (COX-2) together with other different clinically used therapeutic strategies has recently shown a promise for the chemoprevention of several solid tumors including lung cancer. The aim was to study the possible role of COX-2 -8473 T/C NP and its expression in the pathogenesis of non-small cell lung cancer. One hundred ninety non-small cell lung cancer (NSCLC) patients and 200 healthy age-, sex-, and smoking-matched controls were used for polymorphic analysis, and 48 histopathologically confirmed NSCLC patients were analyzed for COX-2 messenger RNA (mRNA) and protein expression. Our results showed that the frequencies of variant genotypes 8473 CT/CC were significantly less common in the cases (30.0%) than in the controls (36%), suggesting that the 8473 C variant allele is related with lower susceptibility in NSCLC (OR = 0.79, 95% CI 0.54-1.4). However, the frequency of COX-2 -8473 TC and CC genotypes were significantly associated with age in NSCLC (P = 0.02). Quantitative real-time expression analysis showed a significant increase in the COX-2 mRNA in tumor tissues as compared to their adjacent normal tissues [delta cycle threshold (ΔCT) = 9.25 ± 4.67 vs 5.63 ± 3.85, P = 0.0001]. Multivariate logistic regression analyses revealed that the COX-2 expression was associated significantly with age (P = 0.044). Also, an increasing trend was observed in stages I and II and in female patients compared to stages III and IV and male patients, respectively, but no statistical significance was observed. However, COX-2 mRNA expression shown no association with the -8473 C variant allele. Our findings indicate that the COX-2 T8473C polymorphism may contribute to NSCLC cancer susceptibility in the Kashmiri population, while our expression analysis revealed a significant increase of COX-2 in tumor tissues as compared to their adjacent normal tissues, suggesting that it could become an important therapeutic marker in NSCLC in the future.
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Affiliation(s)
- Imtiyaz A Bhat
- Department of Immunology and Molecular Medicine, Sher-I-Kashmir Institute of Medical Sciences, Soura, Srinagar, Kashmir, 190011, India,
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