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Non coding RNAs as the critical factors in chemo resistance of bladder tumor cells. Diagn Pathol 2020; 15:136. [PMID: 33183321 PMCID: PMC7659041 DOI: 10.1186/s13000-020-01054-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 11/05/2020] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Bladder cancer (BCa) is the ninth frequent and 13th leading cause of cancer related deaths in the world which is mainly observed among men. There is a declining mortality rates in developed countries. Although, the majority of BCa patients present Non-Muscle-Invasive Bladder Cancer (NMIBC) tumors, only 30% of patients suffer from muscle invasion and distant metastases. Radical cystoprostatectomy, radiation, and chemotherapy have proven to be efficient in metastatic tumors. However, tumor relapse is observed in a noticeable ratio of patients following the chemotherapeutic treatment. Non-coding RNAs (ncRNAs) are important factors during tumor progression and chemo resistance which can be used as diagnostic and prognostic biomarkers of BCa. MAIN BODY In present review we summarized all of the lncRNAs and miRNAs associated with chemotherapeutic resistance in bladder tumor cells. CONCLUSIONS This review paves the way of introducing a prognostic panel of ncRNAs for the BCa patients which can be useful to select a proper drug based on the lncRNA profiles of patients to reduce the cytotoxic effects of chemotherapy in such patients.
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2
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Gholamian Dehkordi N, Mirzaei SA, Elahian F. Pharmacodynamic mechanisms of anti-inflammatory drugs on the chemosensitization of multidrug-resistant cancers and the pharmacogenetics effectiveness. Inflammopharmacology 2020; 29:49-74. [PMID: 33070257 DOI: 10.1007/s10787-020-00765-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 09/27/2020] [Indexed: 01/07/2023]
Abstract
Drug resistance as a remarkable issue in cancer treatment is associated with inflammation which occurs through complex chemical reactions in the tumor microenvironment. Recent studies have implicated that glucocorticoids and NSAIDs are mainly useful combinations for inflammatory response modulation in chemotherapeutic protocols for cancer treatment. Immunosuppressive actions of glucocorticoids and NSAIDs are mainly mediated by the transrepression or activation regulation of inflammatory genes with different DNA-bound transcription factors including AP-1, NFAT, NF-κB, STAT and also, varying functions of COX enzymes in cancer cells. Interestingly, many investigations have proved the benefits of these anti-inflammatory agents in the quenching of multidrug resistance pathways. Numerous analyses on the ABC transporter promoters showed conserved nucleotide sequences with several DNA response elements that participate in transcriptional regulation. Furthermore, genetic variations in nucleotide sequences of membrane transporters were strongly associated with changes in these transporters' expression or function and a substantial impact on systemic drug exposure and toxicity. It appeared that several polymorphisms in MDR transporter genes especially MDR1 have influenced the regulatory mechanisms and explained differences in glucocorticoid responses.
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Affiliation(s)
- Neda Gholamian Dehkordi
- Department of Molecular Medicine, School of Advanced Technologies, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Seyed Abbas Mirzaei
- Cancer Research Center, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Fatemeh Elahian
- Cellular and Molecular Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran.
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3
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Smith PG, Roque D, Ching MM, Fulton A, Rao G, Reader JC. The Role of Eicosanoids in Gynecological Malignancies. Front Pharmacol 2020; 11:1233. [PMID: 32982722 PMCID: PMC7479818 DOI: 10.3389/fphar.2020.01233] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 07/28/2020] [Indexed: 12/20/2022] Open
Abstract
Eicosanoids, bio-active lipid molecules, evoke a multitude of biological effects that directly affect cancer cells and indirectly affect tumor microenvironment. An emerging role has been shown for eicosanoids in the pathogenesis of gynecological malignancies which include cancers of the vulva, vagina, cervix, uterine, and ovary. Eicosanoid biosynthesis pathways start at the metabolism of phospholipids by phospholipase A2 then proceeding to one of three pathways: the cyclooxygenase (COX), lipoxygenase (LOX), or P450 epoxygenase pathways. The most studied eicosanoid pathways include COX and LOX; however, more evidence is appearing to support further study of the P450 epoxygenase pathway in gynecologic cancers. In this review, we present the current knowledge of the role of COX, LOX and P450 pathways in the pathogenesis of gynecologic malignancies. Vulvar and vaginal cancer, the rarest subtypes, there is association of COX-2 expression with poor disease specific survival in vulvar cancer and, in vaginal cancer, COX-2 expression has been found to play a role in mucosal inflammation leading to disease susceptibility and transmission. Cervical cancer is associated with COX-2 levels 7.4 times higher than in healthy tissues. Additionally, HPV elevates COX-2 levels through the EGFR pathway and HIV promotes elevated COX-2 levels in cervical tissue as well as increases PGE2 levels eliciting inflammation and progression of cancer. Evidence supports significant roles for both the LOX and COX pathways in uterine cancer. In endometrial cancer, there is increased expression of 5-LOX which is associated with adverse outcomes. Prostanoids in the COX pathway PGE2 and PGF2α have been shown to play a significant role in uterine cancer including alteration of proliferation, adhesion, migration, invasion, angiogenesis, and the inflammatory microenvironment. The most studied gynecological malignancy in regard to the potential role of eicosanoids in tumorigenesis is ovarian cancer in which all three pathways have shown to be associated or play a role in ovarian tumorigenesis directly on the tumor cell or through modulation of the tumor microenvironment. By identifying the gaps in knowledge, additional pathways and targets could be identified in order to obtain a better understanding of eicosanoid signaling in gynecological malignancies and identify potential new therapeutic approaches.
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Affiliation(s)
- Paige G. Smith
- Department of Obstetrics, Gynecology and Reproductive Medicine, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Dana Roque
- Department of Obstetrics, Gynecology and Reproductive Medicine, University of Maryland School of Medicine, Baltimore, MD, United States
- Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, United States
| | - Mc Millan Ching
- Cellular and Molecular Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Amy Fulton
- Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, United States
- Department of Pathology, University of Maryland School of Medicine, Baltimore, MD, United States
- Baltimore Veterans Administration Medical Center, Baltimore, MD, United States
| | - Gautam Rao
- Department of Obstetrics, Gynecology and Reproductive Medicine, University of Maryland School of Medicine, Baltimore, MD, United States
- Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, United States
| | - Jocelyn C. Reader
- Department of Obstetrics, Gynecology and Reproductive Medicine, University of Maryland School of Medicine, Baltimore, MD, United States
- Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, United States
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4
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Wu CP, Hung CY, Lusvarghi S, Huang YH, Tseng PJ, Hung TH, Yu JS, Ambudkar SV. Overexpression of ABCB1 and ABCG2 contributes to reduced efficacy of the PI3K/mTOR inhibitor samotolisib (LY3023414) in cancer cell lines. Biochem Pharmacol 2020; 180:114137. [PMID: 32634436 DOI: 10.1016/j.bcp.2020.114137] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/26/2020] [Accepted: 07/02/2020] [Indexed: 12/15/2022]
Abstract
LY3023414 (samotolisib) is a promising new dual inhibitor of phosphoinositide 3-kinase (PI3K) and mammalian target of rapamycin (mTOR). Currently, multiple clinical trials are underway to evaluate the efficacy of LY3023414 in patients with various types of cancer. However, the potential mechanisms underlying acquired resistance to LY3023414 in human cancer cells still remain elusive. In this study, we investigated whether the overexpression of ATP-binding cassette (ABC) drug transporters such as ABCB1 and ABCG2, one of the most common mechanisms for developing multidrug resistance, may potentially reduce the efficacy of LY3023414 in human cancer cells. We demonstrated that the intracellular accumulation of LY3023414 in cancer cells was significantly reduced by the drug efflux function of ABCB1 and ABCG2. Consequently, the cytotoxicity and efficacy of LY3023414 for inhibiting the activation of the PI3K pathway and induction of G0/G1 cell-cycle arrest were substantially reduced in cancer cells overexpressing ABCB1 or ABCG2, which could be restored using tariquidar or Ko143, respectively. Furthermore, stimulatory effect of LY3023414 on the ATPase activity of ABCB1 and ABCG2, as well as in silico molecular docking analysis of LY3023414 binding to the substrate-binding pockets of these transporters provided additional insight into the manner in which LY3023414 interacts with both transporters. In conclusion, we report that LY3023414 is a substrate for ABCB1 and ABCG2 transporters implicating their role in the development of resistance to LY3023414, which can have substantial clinical implications and should be further investigated.
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Affiliation(s)
- Chung-Pu Wu
- Graduate Institute of Biomedical Sciences, Taiwan; Department of Physiology and Pharmacology, Taiwan; Molecular Medicine Research Center, Taiwan; Department of Obstetrics and Gynecology, Taipei Chang Gung Memorial Hospital, Taipei, Taiwan.
| | | | - Sabrina Lusvarghi
- Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, United States
| | | | | | - Tai-Ho Hung
- Department of Chinese Medicine, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan; Department of Obstetrics and Gynecology, Taipei Chang Gung Memorial Hospital, Taipei, Taiwan
| | - Jau-Song Yu
- Graduate Institute of Biomedical Sciences, Taiwan; Molecular Medicine Research Center, Taiwan; Department of Biochemistry and Molecular Biology, Taiwan; Liver Research Center, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Suresh V Ambudkar
- Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, United States
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5
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Oplawski M, Dziobek K, Zmarzły N, Grabarek BO, Kiełbasiński R, Kieszkowski P, Januszyk P, Talkowski K, Schweizer M, Kras P, Plewka A, Boroń D. Variances in the Level of COX-2 and iNOS in Different Grades of Endometrial Cancer. Curr Pharm Biotechnol 2020; 21:52-59. [PMID: 31533599 DOI: 10.2174/1389201020666190918104105] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 08/30/2019] [Accepted: 09/01/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Many experimental studies have demonstrated the importance of COX-2 in the tumor angiogenesis. Inducible iNOS is responsible for a high and stable level of nitric oxide and is expressed in response to pro-inflammatory factors. OBJECTIVE The aim of this study was to evaluate the expression of COX-2 and iNOS at the protein level and to assess their potential prognostic significance in patients with endometrial cancer. METHODS The study group consisted of 45 women with endometrial cancer divided according to the degree of histological differentiation i.e. G1, 17; G2, 15; G3, 13. The control group consisted of 15 women without neoplastic changes. The expression of studied proteins was determined immunohistochemically with specific polyclonal antibodies. RESULTS Analysis of the COX-2 expression showed that the optical density of the reaction product in G1 reached 186% in the control group, while the values in G2 and G3 reached 243% and 293%, respectively. In the case of iNOS, the optical density of the reaction product reached the following percentages in the control group: 147% in G1, 243% in G2, and 241% in G3. CONCLUSION Our findings suggest that changes in the expression of COX-2 and iNOS may be potentially useful in predicting the progression of endometrial cancer and treatment effectiveness.
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Affiliation(s)
- Marcin Oplawski
- Department of Gynecology and Obstetrics with Gynecologic Oncology, Ludwik Rydygier Memorial Specialized Hospital, Kraków, Poland.,Katowice School of Technology, The University of Science and Art in Katowice, Katowice, Poland
| | - Konrad Dziobek
- Center of Oncology, M. Sklodowska-Curie Memorial Institute, Cracow Branch, Cracow, Poland
| | - Nikola Zmarzły
- Katowice School of Technology, The University of Science and Art in Katowice, Katowice, Poland.,Department of Molecular Biology, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia in Katowice, Katowice, Poland
| | - Beniamin O Grabarek
- Katowice School of Technology, The University of Science and Art in Katowice, Katowice, Poland.,Center of Oncology, M. Sklodowska-Curie Memorial Institute, Cracow Branch, Cracow, Poland.,Department of Molecular Biology, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia in Katowice, Katowice, Poland
| | - Robert Kiełbasiński
- Department of Obstetrics & Gynaecology Ward, Health Center in Mikołów, Mikołów, Poland
| | | | - Piotr Januszyk
- Katowice School of Technology, The University of Science and Art in Katowice, Katowice, Poland
| | - Karol Talkowski
- University of Warmia and Mazury in Olsztyn, Department of Psychiatry, Olsztyn, Poland
| | - Michał Schweizer
- Center of Oncology, M. Sklodowska-Curie Memorial Institute, Cracow Branch, Cracow, Poland
| | - Piotr Kras
- Department of Gynecology and Obstetrics with Gynecologic Oncology, Ludwik Rydygier Memorial Specialized Hospital, Kraków, Poland
| | - Andrzej Plewka
- Faculty of Health Science, Public Higher Medical Professional School in Opole, Opole, Poland
| | - Dariusz Boroń
- Department of Gynecology and Obstetrics with Gynecologic Oncology, Ludwik Rydygier Memorial Specialized Hospital, Kraków, Poland.,Katowice School of Technology, The University of Science and Art in Katowice, Katowice, Poland.,Faculty of Health Science, Public Higher Medical Professional School in Opole, Opole, Poland
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6
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Abo Aasy NK, Ragab D, Sallam MA, Abdelmonsif DA, Aly RG, Elkhodairy KA. A comparative study: the prospective influence of nanovectors in leveraging the chemopreventive potential of COX-2 inhibitors against skin cancer. Int J Nanomedicine 2019; 14:7561-7581. [PMID: 31571864 PMCID: PMC6756578 DOI: 10.2147/ijn.s218905] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 08/18/2019] [Indexed: 01/01/2023] Open
Abstract
Introduction This study was conducted to elucidate the chemopreventive potential, cytotoxic, and suppression of cellular metastatic activity of etodolac (ETD)-loaded nanocarriers. Methods To esteem the effect of charge and composition of the nanovectors on their performance, four types of vectors namely, negative lipid nanovesicles; phosalosomes (N-Phsoms), positive phosalosomes (P-Phsoms), nanostructured lipid carriers (NLCs) and polymeric alginate polymer (AlgNPs) were prepared and compared. ETD was used as a model cyclo-oxygenase-2 (COX-2) inhibitor to evaluate the potency of these nanovectors to increase ETD permeation and retention through human skin and cytotoxicity against squamous cell carcinoma cell line (SCC). Moreover, the chemopreventive activity of ETD nanovector on mice skin cancer model was evaluated. Results Among the utilized nanovectors, ETD-loaded N-Phsoms depicted spherical vesicles with the smallest particle size (202.96±2.37 nm) and a high zeta potential of −24.8±4.16 mV. N-Phsoms exhibited 1.5, and 3.6 folds increase in the ETD amount deposited in stratum corneum, epidermis and dermis. Moreover, cytotoxicity studies revealed a significant cytotoxic potential of such nanovector with IC50=181.76 compared to free ETD (IC50=982.75), correlated to enhanced cellular internalization. Its efficacy extended to a reduction in the relative tumor weight with 1.70 and 1.51-fold compared to positive control and free ETD, that manifested by a 1.72-fold reduction in both COX-2 and proliferating cell nuclear antigen mRNA (PCNA-mRNA) levels and 2.63-fold elevation in caspase-3 level in skin tumors relative to the positive control group with no hepato-and nephrotoxicity. Conclusion Encapsulation of ETD in nanovector enhances its in-vitro and in-vivo anti-tumor activity and opens the door for encapsulation of more relevant drugs.
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Affiliation(s)
- Noha Khalifa Abo Aasy
- Department of Industrial Pharmacy, Faculty of Pharmacy, Alexandria University, Alexandria 21521, Egypt
| | - Doaa Ragab
- Department of Industrial Pharmacy, Faculty of Pharmacy, Alexandria University, Alexandria 21521, Egypt.,Department of Chemical and Biochemical Engineering, Faculty of Engineering, University of Western Ontario, London, Ontario, Canada
| | - Marwa Ahmed Sallam
- Department of Industrial Pharmacy, Faculty of Pharmacy, Alexandria University, Alexandria 21521, Egypt.,John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - Doaa A Abdelmonsif
- Department of Medical Biochemistry, Faculty of Medicine, Alexandria University, Alexandria, Egypt.,Molecular Biology and Nanomedicine Labs, Centre of Excellence for Regenerative Medicine Research & Applications, University of Alexandria, Alexandria, Egypt
| | - Rania G Aly
- Department of Surgical Pathology, Faculty of Medicine, Alexandria University, Alexandria, Egypt
| | - Kadria A Elkhodairy
- Department of Industrial Pharmacy, Faculty of Pharmacy, Alexandria University, Alexandria 21521, Egypt
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7
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Guo F, Hu Y, Niu Q, Li Y, Ding Y, Ma R, Wang X, Li S, Xie J. Grape Seed Proanthocyanidin Extract Inhibits Human Esophageal Squamous Cancerous Cell Line ECA109 via the NF- κB Signaling Pathway. Mediators Inflamm 2018; 2018:3403972. [PMID: 30647533 PMCID: PMC6311955 DOI: 10.1155/2018/3403972] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 07/17/2018] [Accepted: 08/05/2018] [Indexed: 12/17/2022] Open
Abstract
Esophageal squamous cell carcinoma is the most common type of squamous cell carcinoma. Grape seed proanthocyanidin extract (GSPE) is considered to exhibit anticancer activity against several different types of cancer. We aimed to determine whether GSPE inhibited esophageal squamous cancerous cells and the possible involvement of NF-κB in this process. The human esophageal squamous cancer cell line ECA109 was treated with GSPE (0-80 μg/mL) and BAY11-7082 (10 μmol/L) for 12, 24, and 48 h. The MTT assay was used to determine cell proliferation; alterations in cell apoptosis were detected by flow cytometry; levels of inflammatory factors interleukin-6 and cyclooxygenase-2 and apoptotic proteins Bax/Bcl-2 were measured by ELISA; qRT-PCR and western blots were used to examine the activation of caspase-3 and NF-κB signaling. GSPE inhibited the proliferation of ECA109 cells and induced cellular apoptosis in a time- and dose-dependent manner. ELISA results showed that GSPE and BAY11-7082 reduced the secretion of inflammatory cytokines interleukin-6 and cyclooxygenase-2. The results of PCR and western blotting indicated that GSPE and BAY11-7082 activated caspase-3 and attenuated the activation of the NF-κB signaling pathway. GSPE induced apoptosis in ECA109 cells and inhibited ECA109 cell proliferation via a reduction in the secretion of inflammatory cytokines. This mechanism may be related to the attenuation of NF-κB activity and the sensitization of caspase-3.
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Affiliation(s)
- Fangming Guo
- Department of Public Health, Shihezi University School of Medicine, 832000, China
- Key Laboratory for Xinjiang Endemic and Ethnic Diseases, 832000, China
| | - Yunhua Hu
- Department of Public Health, Shihezi University School of Medicine, 832000, China
- Key Laboratory for Xinjiang Endemic and Ethnic Diseases, 832000, China
| | - Qiang Niu
- Department of Public Health, Shihezi University School of Medicine, 832000, China
- Key Laboratory for Xinjiang Endemic and Ethnic Diseases, 832000, China
| | - Yu Li
- Department of Public Health, Shihezi University School of Medicine, 832000, China
- Key Laboratory for Xinjiang Endemic and Ethnic Diseases, 832000, China
| | - Yusong Ding
- Department of Public Health, Shihezi University School of Medicine, 832000, China
- Key Laboratory for Xinjiang Endemic and Ethnic Diseases, 832000, China
| | - Rulin Ma
- Department of Public Health, Shihezi University School of Medicine, 832000, China
- Key Laboratory for Xinjiang Endemic and Ethnic Diseases, 832000, China
| | - Xianhua Wang
- Department of Quality Control of Changji Autonomous Prefecture Center for Disease Control and Prevention, 831100, China
| | - Shugang Li
- Department of Public Health, Shihezi University School of Medicine, 832000, China
- Key Laboratory for Xinjiang Endemic and Ethnic Diseases, 832000, China
| | - Jianxin Xie
- Key Laboratory for Xinjiang Endemic and Ethnic Diseases, 832000, China
- Department of Biochemistry, Shihezi University School of Medicine, 832000, China
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8
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Van Nyen T, Moiola CP, Colas E, Annibali D, Amant F. Modeling Endometrial Cancer: Past, Present, and Future. Int J Mol Sci 2018; 19:E2348. [PMID: 30096949 PMCID: PMC6121384 DOI: 10.3390/ijms19082348] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 07/31/2018] [Accepted: 08/03/2018] [Indexed: 12/13/2022] Open
Abstract
Endometrial cancer is the most common type of cancer of the female reproductive tract. Although prognosis is generally good for patients with low-grade and early-stage diseases, the outcomes for high-grade and metastatic/recurrent cases remain poor, since traditional chemotherapy regimens based on platinum and taxanes have limited effects. No targeted agents have been approved so far, although several new drugs have been tested without striking results in clinical trials. Over the last decades, many efforts have been made towards the establishment and development of preclinical models, aiming at recapitulating the structural and molecular determinants of the disease. Here, we present an overview of the most commonly used in vitro and in vivo models and discuss their peculiar features, describing their main applications and the value in the advancement of both fundamental and translational endometrial cancer research.
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Affiliation(s)
- Tom Van Nyen
- Department of Oncology, Gynecological Oncology, KU Leuven, 3000 Leuven, Belgium.
| | - Cristian P Moiola
- Pathological Oncology Group, Biomedical Research Institute of Lleida (IRBLLEIDA), University Hospital Arnau de Vilanova, 25198 Lleida, Spain.
- Biomedical Research Group in Gynecology, Vall Hebron Institute of Research, CIBERONC, 08035 Barcelona, Spain.
| | - Eva Colas
- Biomedical Research Group in Gynecology, Vall Hebron Institute of Research, CIBERONC, 08035 Barcelona, Spain.
| | - Daniela Annibali
- Department of Oncology, Gynecological Oncology, KU Leuven, 3000 Leuven, Belgium.
| | - Frédéric Amant
- Department of Oncology, Gynecological Oncology, KU Leuven, 3000 Leuven, Belgium.
- Centre for Gynecologic Oncology Amsterdam (CGOA), Antoni Van Leeuwenhoek-Netherlands Cancer Institute (Avl-NKI) and University Medical Centra (UMC), 1066 CX Amsterdam, The Netherlands.
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9
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Bu Q, Fang Y, Cao Y, Chen Q, Liu Y. Enforced expression of miR-101 enhances cisplatin sensitivity in human bladder cancer cells by modulating the cyclooxygenase-2 pathway. Mol Med Rep 2014; 10:2203-9. [PMID: 25109742 DOI: 10.3892/mmr.2014.2455] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Accepted: 06/09/2014] [Indexed: 11/05/2022] Open
Abstract
Alterations in microRNA (miRNA) expression have been shown to be involved in the tumor response to chemotherapy. However, the possible role of miR‑101 in cisplatin sensitivity in human bladder cancer cells remains unclear. In this study, quantitative polymerase chain reaction and western blotting were utilized to determine the expression profiles of miR‑101 and cyclooxygenase‑2 (COX‑2) in human bladder cancer cells. The effect of miR‑101 and small interfering RNA (siRNA) against COX‑2 on cell viability was evaluated using MTT assays, and apoptosis levels were determined using fluorescence‑activated cell sorting analysis of Annexin V/propidium iodide‑stained cells. Luciferase reporter plasmids were constructed to confirm direct targeting. This study found that the expression of miR‑101 was downregulated in the cisplatin‑resistant cell line T24/CDDP as compared with that in the parental line, T24. Furthermore, overexpression of miR‑101 significantly increased the anti‑proliferative effects and apoptosis induced by cisplatin, whereas knockdown of miR‑101 significantly decreased the anti‑proliferative effects and apoptosis induced by cisplatin. In addition, downregulation of miR‑101 induced cell survival and cisplatin resistance through the upregulation of COX‑2 expression. Luciferase gene reporter assays confirmed that COX‑2 was a direct target gene of miR‑101. Inhibition of COX‑2 using COX‑2 siRNA abrogated the cisplatin resistance induced by miR‑101 downregulation. These results suggest that miR‑101 may provide a novel mechanism for understanding cisplatin resistance in bladder cancer by modulating the COX‑2 pathway.
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Affiliation(s)
- Qiang Bu
- Department of Urology, Danyang People's Hospital, Zhenjiang, Jiangsu, P.R. China
| | - Yue Fang
- Department of Central Laboratory, The Affiliated People's Hospital, Jiangsu University, Zhenjiang, P.R. China
| | - Yuan Cao
- Department of Central Laboratory, The Affiliated People's Hospital, Jiangsu University, Zhenjiang, P.R. China
| | - Qiaoyun Chen
- Department of Central Laboratory, The Affiliated People's Hospital, Jiangsu University, Zhenjiang, P.R. China
| | - Yangchen Liu
- Department of Oncology, Taixing People's Hospital, Taixing, Jiangsu, P.R. China
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