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Sykaras AG, Christofidis K, Politi E, Theocharis S. Exosomes on Endometrial Cancer: A Biomarkers Treasure Trove? Cancers (Basel) 2022; 14:cancers14071733. [PMID: 35406505 PMCID: PMC8996953 DOI: 10.3390/cancers14071733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 03/24/2022] [Accepted: 03/27/2022] [Indexed: 11/16/2022] Open
Abstract
Endometrial cancer (EC) is one of the main causes of cancer-related death among women. In the last decade, the incidence of EC is on the rise, and the relative 5-year survival remains unchanged. This creates a dire need for new diagnostic and therapeutic approaches that can only result from a deeper understanding of the pathogenesis of the disease. In this direction, exosomes are under heavy research, with two main aims: to identify the potential diagnostic and prognostic markers and to develop technologies based on their use as therapeutic vectors targeting EC cells. Exosomes are widely available in all bodily fluids and are sources of ideal biomarkers for liquid biopsies. They are extracellular vesicles containing DNA, RNA, lipids, and proteins, which they transfer between cells, serving multiple functions and being implicated in both the physiological processes and the pathogenesis of diseases. Of all the biomolecules contained in exosomes, microRNAs (miRNAs) seem to have the most clinical utility in the diagnosis and treatment of EC. Exosomal miRNAs mediate the communication between EC cells, cancer-associated fibroblasts (CAFs), and tumor-associated macrophages (TAMs) and have a pivotal role in the tumor cells' proliferation, epithelial to mesenchymal transition (EMT), and the formation of a tumor microenvironment. They participate in many processes that are tied to carcinogenesis and cancer progression, and they are therefore considered as attractive therapeutic targets. Here, we review the functions of exosomes in EC, focusing on potential biomarkers of diagnostic and prognostic significance or potential therapeutic use.
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Affiliation(s)
- Alexandros G. Sykaras
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece; (A.G.S.); (K.C.)
- Department of Cytopathology, Aretaieion Hospital, Medical School, National and Kapodistrian University of Athens, 11528 Athens, Greece;
| | - Konstantinos Christofidis
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece; (A.G.S.); (K.C.)
| | - Ekaterini Politi
- Department of Cytopathology, Aretaieion Hospital, Medical School, National and Kapodistrian University of Athens, 11528 Athens, Greece;
| | - Stamatios Theocharis
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece; (A.G.S.); (K.C.)
- Correspondence:
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2
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Bai X, Bian Z. MicroRNA-21 Is a Versatile Regulator and Potential Treatment Target in Central Nervous System Disorders. Front Mol Neurosci 2022; 15:842288. [PMID: 35173580 PMCID: PMC8841607 DOI: 10.3389/fnmol.2022.842288] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 01/07/2022] [Indexed: 12/13/2022] Open
Abstract
MicroRNAs (miRNAs) are a class of endogenous, non-coding, single-stranded RNAs with a length of approximately 22 nucleotides that are found in eukaryotes. miRNAs are involved in the regulation of cell differentiation, proliferation, invasion, apoptosis, and metabolism by regulating the expression of their target genes. Emerging studies have suggested that various miRNAs play key roles in the pathogenesis of central nervous system (CNS) disorders and may be viable therapeutic targets. In particular, miR-21 has prominently emerged as a focus of increasing research on the mechanisms of its involvement in CNS disorders. Herein, we reviewed recent studies on the critical roles of miR-21, including its dysregulated expression and target genes, in the regulation of pathophysiological processes of CNS disorders, with a special focus on apoptosis and inflammation. Collectively, miR-21 is a versatile regulator in the progression of CNS disorders and could be a promising biomarker and therapeutic target for these diseases. An in-depth understanding of the mechanisms by which miR-21 affects the pathogenesis of CNS disorders could pave the way for miR-21 to serve as a therapeutic target for these conditions.
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Affiliation(s)
- Xue Bai
- Department of Gerontology and Geriatrics, Shengjing Hospital of China Medical University, Shenyang, China
| | - Zhigang Bian
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Shenyang, China
- *Correspondence: Zhigang Bian,
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3
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Klicka K, Grzywa TM, Klinke A, Mielniczuk A, Włodarski PK. The Role of miRNAs in the Regulation of Endometrial Cancer Invasiveness and Metastasis-A Systematic Review. Cancers (Basel) 2021; 13:3393. [PMID: 34298609 PMCID: PMC8304659 DOI: 10.3390/cancers13143393] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 06/18/2021] [Accepted: 07/02/2021] [Indexed: 12/17/2022] Open
Abstract
Endometrial cancer (EC) is the most common genital cancer in women with increasing death rates. MiRNAs are short non-coding RNAs that regulate gene expression on the post-transcriptional levels. Multiple studies demonstrated a fundamental role of miRNAs in the regulation of carcinogenesis. This systematic review is a comprehensive overview of the role of miRNAs in the regulation of cancer cell invasiveness and metastasis in EC. The literature was searched for studies investigating the role of miRNAs in the regulation of invasiveness and metastasis in EC. We explored PubMed, Embase, and Scopus using the following keywords: miRNA, metastasis, invasiveness, endometrial cancer. Data were collected from 163 articles that described the expression and role of 106 miRNAs in the regulation of EC invasiveness and metastasis out of which 63 were tumor suppressor miRNAs, and 38 were oncomiRNAs. Five miRNAs had a discordant role in different studies. Moreover, we identified 66 miRNAs whose expression in tumor tissue or concentration in serum correlated with at least one clinical parameter. These findings suggest a crucial role of miRNAs in the regulation of EC invasiveness and metastasis and present them as potential prognostic factors for patients with EC.
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Affiliation(s)
- Klaudia Klicka
- Department of Methodology, Medical University of Warsaw, 02-091 Warsaw, Poland; (K.K.); (T.M.G.); (A.K.); (A.M.)
- Doctoral School, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Tomasz M. Grzywa
- Department of Methodology, Medical University of Warsaw, 02-091 Warsaw, Poland; (K.K.); (T.M.G.); (A.K.); (A.M.)
- Doctoral School, Medical University of Warsaw, 02-091 Warsaw, Poland
- Department of Immunology, Medical University of Warsaw, 02-097 Warsaw, Poland
| | - Alicja Klinke
- Department of Methodology, Medical University of Warsaw, 02-091 Warsaw, Poland; (K.K.); (T.M.G.); (A.K.); (A.M.)
| | - Aleksandra Mielniczuk
- Department of Methodology, Medical University of Warsaw, 02-091 Warsaw, Poland; (K.K.); (T.M.G.); (A.K.); (A.M.)
| | - Paweł K. Włodarski
- Department of Methodology, Medical University of Warsaw, 02-091 Warsaw, Poland; (K.K.); (T.M.G.); (A.K.); (A.M.)
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4
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Bouziyane A, Lamsisi M, Benaguida H, Benhessou M, El Kerroumi M, Ennaji MM. Diagnostic Value of MicroRNA 21 in Endometrial Cancer and Benign Lesions and its Differential Expression in Relation to Clinicopathological Parameters. Microrna 2021; 10:146-152. [PMID: 34086554 DOI: 10.2174/2211536610666210604122816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 03/16/2021] [Accepted: 04/14/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Endometrial cancer is one of the most common malignancies among women worldwide. Although this cancer is often diagnosed at early stages, the need for biomarkers of diagnosis remains a necessity to overcome conventional invasive procedures of diagnosis. OBJECTIVE In our study, we aim to investigate the diagnostic value of microRNA-21 in endometrial cancer and its relation to clinicopathological features. METHODS We used RT-qPCR to measure the expression of microRNA-21 in 71 tumor tissues, 53 adjacent tissues, and 54 benign lesions. RESULTS Our results show that microRNA-21 is a potential biomarker for endometrial cancer with an area under the receiver operating characteristic curve of 0.925 (95% CI = 0.863 - 0.964, P<0.0001). The sensitivity was 84.51% (95% CI = 74.0 - 92.0) and specificity was 86.79% (95% CI = 74.7 - 94.5). For discrimination between benign lesions and controls the AUC was 0,881 with a sensitivity of 100% (95% CI = 93.4 - 100.0) and specificity of 66.04 % (95% CI = 51.7 - 78.5), and for discriminating benign lesions from tumors the AUC was 0,750 with a sensitivity of 54.93% (95% CI = 42.7 - 66.8) and specificity of 90.74% (95% CI = 79.7 - 96.9). We also found that tumors with elevated microRNA-21 expression are of advanced FIGO stage, high histological grades, and have cervical invasion, myometrial invasion and distant metastasis. CONCLUSION Our findings support the important role of miR-21 as a biomarker for the diagnosis of endometrial cancer. Further studies on minimally invasive/noninvasive samples such as serum, blood, and urine are necessary to provide a better alternative to current diagnosis methods.
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Affiliation(s)
- Amal Bouziyane
- Mohammed VI University of Health Sciences, Casablanca, Morocco
| | - Maryame Lamsisi
- Laboratory of Virology, Microbiology, Quality, and Biotechnologies/ ETB. Faculty of Science and Techniques Mohammedia - Hassan II University of Casablanca, Morocco
| | - Hicham Benaguida
- Mohammed VI Center for cancer treatment, University Hospital Ibn Rochd, Casablanca, Morocco
| | - Mustapha Benhessou
- Mohammed VI Center for cancer treatment, University Hospital Ibn Rochd, Casablanca, Morocco
| | - Mohamed El Kerroumi
- Mohammed VI Center for cancer treatment, University Hospital Ibn Rochd, Casablanca, Morocco
| | - Moulay Mustapha Ennaji
- Laboratory of Virology, Microbiology, Quality, and Biotechnologies/ ETB. Faculty of Science and Techniques Mohammedia - Hassan II University of Casablanca, Morocco
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5
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Jahanbakhshi F, Maleki Dana P, Badehnoosh B, Yousefi B, Mansournia MA, Jahanshahi M, Asemi Z, Halajzadeh J. Curcumin anti-tumor effects on endometrial cancer with focus on its molecular targets. Cancer Cell Int 2021; 21:120. [PMID: 33602218 PMCID: PMC7891161 DOI: 10.1186/s12935-021-01832-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 02/10/2021] [Indexed: 02/07/2023] Open
Abstract
Curcumin is extracted from turmeric and shows a variety of properties that make it a useful agent for treating diseases and targeting different biological mechanisms, including apoptosis, angiogenesis, inflammation, and oxidative stress. This phenolic compound is safe even at high doses. However, it has poor bioavailability. The incidence rates of endometrial cancer (EC) that is one of the most prevalent gynecological malignancies is increasing. Meanwhile, the onset age of EC has been decreased in past few years. Besides, EC does not show a convenient prognosis, particularly at advanced stages. Based on this information, discovering new approaches or enhancing the available ones is required to provide better care for EC patients. In this review, we cover studies concerned with the anti-tumor effects of curcumin on EC. We focus on molecular mechanisms that are targeted by curcumin treatment in different processes of cancer development and progression, such as apoptosis, inflammation, and migration. Furthermore, we present the role of curcumin in targeting some microRNAs (miRNAs) that may play a role in EC.
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Affiliation(s)
- Fahime Jahanbakhshi
- Department of Gynecology and Obstetrics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Parisa Maleki Dana
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Islamic Republic of Iran.
| | - Bita Badehnoosh
- Department of Gynecology and Obstetrics, Dietary Supplements and Probiotic Research Center, Alborz University of Medical Sciences, Karaj, Iran
| | - Bahman Yousefi
- Molecular Medicine Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Biochemistry and Clinical Laboratories, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Ali Mansournia
- Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Moghadeseh Jahanshahi
- Clinical Research Development Center (CRDC), Sayad Shirazi Hospital, Golestan University of Medical Sciences, Gorgan, Iran
| | - Zatollah Asemi
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Islamic Republic of Iran
| | - Jamal Halajzadeh
- Department of Biochemistry and Nutrition, Research Center for Evidence-Based Health Management, Maragheh University of Medical Sciences, Maragheh, Iran.
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Chen KH, Pan MJ, Jargalsaikhan Z, Ishdorj TO, Tseng FG. Development of Surface-Enhanced Raman Scattering (SERS)-Based Surface-Corrugated Nanopillars for Biomolecular Detection of Colorectal Cancer. BIOSENSORS 2020; 10:E163. [PMID: 33142781 PMCID: PMC7692079 DOI: 10.3390/bios10110163] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 10/29/2020] [Accepted: 10/30/2020] [Indexed: 02/06/2023]
Abstract
In this paper, a nanobiosensor with surface-enhanced Raman scattering (SERS) capability is introduced for highly sensitive miRNA detection in colorectal cancer. This sensor was designed and fabricated by employing a nanoshielding mechanism from nanopolystyrene beads to resist reactive ion etching and allow anisotropic electrochemical etching, producing high-aspect-ratio, surface-corrugated nanopillars (SiNPs) on a silicon wafer to create extensive hot spots along the nanopillars for improved SERS signals. SERS enhancements were correlated with nanorange roughness, indicating that hot spots along the pillars were the crucial factor to improve the SERS effect. We achieved the detection capability of a trace amount of R6G (10-8 M), and the SERS signal enhancement factor (EF) was close to 1.0 × 107 on surface-corrugated gold SiNPs. miRNA samples were also demonstrated on this sensor with good sensitivity and specificity. The target molecule miR-21-Cy5 was easily monitored through Raman spectrum variation with a PCR-comparable concentration at around 100 pM with clear nucleotide-specific Raman signals, which is also suitable for biomolecule sensing.
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Affiliation(s)
- Kuan-Hung Chen
- Institute of NanoEngineering and MicroSystems, National Tsing Hua University, HsinChu 30013, Taiwan;
| | - Meng-Ju Pan
- Engineering and System Science Dept., National Tsing Hua University, HsinChu 30013, Taiwan;
| | - Zoljargal Jargalsaikhan
- School of Information and Communication Technology, Mongolian University of Science and Technology, Ulaanbaatar 13341-0048, Mongolia; (Z.J.); (T.-O.I.)
| | - Tseren-Onolt Ishdorj
- School of Information and Communication Technology, Mongolian University of Science and Technology, Ulaanbaatar 13341-0048, Mongolia; (Z.J.); (T.-O.I.)
| | - Fan-Gang Tseng
- Institute of NanoEngineering and MicroSystems, National Tsing Hua University, HsinChu 30013, Taiwan;
- Engineering and System Science Dept., National Tsing Hua University, HsinChu 30013, Taiwan;
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, HsinChu 30013, Taiwan
- Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan
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7
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Isci Bostanci E, Guler I, Dikmen AU, Erdem O, Guner H, Onan MA, Taskiran C. Prognostic role of maspin expression in patients with cervical dysplasia and cervical cancer. J Obstet Gynaecol Res 2020; 46:759-764. [PMID: 32079044 DOI: 10.1111/jog.14225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 02/07/2020] [Indexed: 11/27/2022]
Abstract
AIM Mammary serine protease inhibitor (maspin) acts as a tumor suppressor through the inhibition of cancer cell invasion and metastasis. Paradoxically, maspin levels are increased in some types of malignant cells. The aim of this study was to investigate the maspin expression in cervical dysplasia and cervical cancer, and to analyze its' relation with survival. METHODS Maspin expression was detected by immunohistochemistry using labeled streptavidin biotin method to determine cytoplasmic and nuclear maspin expressions in cervical intraepithelial neoplasia grade 1 (CIN1), cervical intraepithelial neoplasia grade 2 (CIN2), cervical intraepithelial neoplasia grade 3 (CIN3) and cervical cancer. RESULTS A total of 89 patients with CIN (29 cases of CIN1, 30 cases of CIN2 and 30 cases of CIN3), and 27 patients with cervical cancer were included to the study. 7.8% of the patients with CIN had maspin staining positivity. On the other hand maspin staining was positive in 20 of 27 patients (74.1%) with cervical carcinoma (P = 0.001). Of these patients 20 (100%) had cytoplasmic, and 8 (40%) had nuclear maspin staining positivity. Cytoplasmic maspin immunoreactive scores were found to be significantly higher in carcinoma group when compared to the patients with CIN1/3 (respectively; P = 0.01, P = 0.02). No difference was noted for nuclear maspin expression. Significant overall survival advantage was detected for patients with nuclear maspin staining (P = 0.03). CONCLUSION The current study shows that nuclear maspin expression is related with better overall survival in cervical cancer. Maspin staining can be a useful diagnostic marker to discriminate cervical intraepithelial neoplasia from cervical carcinoma.
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Affiliation(s)
- Esra Isci Bostanci
- The Department of Gynecologic Oncology, Etlik Zübeyde Hanim Women's Health Training and Research Hospital, Ankara, Turkey
| | - Ismail Guler
- The Department of Obstetrics and Gynecology, Gazi University Medical Faculty Hospital, Ankara, Turkey
| | - Asiye U Dikmen
- The Department of Public Health, Gazi University Medical Faculty Hospital, Ankara, Turkey
| | - Ozlem Erdem
- The Department of Pathology, Gazi University Medical Faculty Hospital, Ankara, Turkey
| | - Haldun Guner
- The Department of Gynecologic Oncology, Gazi University Medical Faculty Hospital, Ankara, Turkey
| | - Mehmet Anil Onan
- The Department of Gynecologic Oncology, Gazi University Medical Faculty Hospital, Ankara, Turkey
| | - Cagatay Taskiran
- The Department of Gynecologic Oncology, Koc Medical Faculty Hospital, Istanbul, Turkey
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8
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Januszyk K, Januszyk P, Grabarek BO, Boroń D, Oplawski M. The Influence of Salinomycin on the Expression Profile of mRNAs Encoding Selected Caspases and MiRNAs Regulating their Expression in Endometrial Cancer Cell Line. Curr Pharm Biotechnol 2020; 21:1505-1515. [PMID: 32407273 PMCID: PMC8206191 DOI: 10.2174/1389201021666200514095043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 03/19/2020] [Accepted: 04/17/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Apoptosis could take place in the pathway dependent on death receptors or pathways dependent on mitochondria. In both, a key role is played by enzymes with protease activity, known as caspases. AIM The aim of this study was to assess the variances in the expression pattern of caspase-dependent signaling pathways in the endometrial cancer cell line when treated with salinomycin. Additionally, the changes in the level of miRNA that potentially regulate these mRNAs were evaluated. MATERIALS AND METHODS Endometrial cancer cells were treated with 1 μM of salinomycin for 12, 24 and 48 hours. Untreated cells made up the control culture. The molecular analysis consisted of screening mRNA and miRNA microarray expression profiles of caspases, and the evaluation of the expression of caspases 3,8 and 9 by RTqPCR, also on the protein level. RESULTS AND DISCUSSION It was observed that 5 of the 14 differentiating mRNAs were commonly found for all incubation times of the cells and they corresponded with CASP3, CASP8, and CASP9 genes. The highest impact probability was determined between CASP3(up-regulated) and hsa- miR- 30d (FC -2.01), CASP8 (down-regulated) and hsa-miR-21 (FC +1.39) and between CASP9 (upregulated) and hsa-miR-1271 (FC +1.71). CONCLUSION Salinomycin induces the apoptosis of endometrial cancer cells. The largest increase in activity was noted for caspases 3 and 9, while the expression of caspase 8 was decreased. Salinomycin causes a regulatory effect on the transcriptomes of mRNA and miRNA in in vitro endometrial cancer cells.
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Affiliation(s)
- Krzysztof Januszyk
- Address correspondence to this author at the Faculty of Health Science, Public Higher Medical Professional School in Opole, Poland;, E-mail:
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9
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Liu Y, Sun H, Mao H, Gao M, Tan X, Li Y, Li Y, Muloye GM, Zhang L, Wang X, Wei Z. Expression of tumor suppressor programmed cell death 4 in endometrioid endometrial carcinomas and clinicopathological significance. Oncol Lett 2018; 15:9369-9376. [PMID: 29805661 DOI: 10.3892/ol.2018.8517] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 03/30/2017] [Indexed: 02/06/2023] Open
Abstract
Programmed cell death 4 (PDCD4), as a novel tumor suppressor, serves important roles in the pathogenesis of tumors. The expression of PDCD4 is downregulated or lost in various human tumors. However, the expression of PDCD4 in endometrial cancer and the clinicopathological significance remain unclear. The aim of the present study was to investigate the expression of PDCD4 in endometrioid endometrial carcinoma (EEC) and the association with clinicopathological parameters. The expression of PDCD4 in EEC tissues and control endometrium was detected by reverse transcription-quantitative polymerase chain reaction, western blotting and immunohistochemistry. PDCD4 expression was also investigated in control endometrial glandular epithelial cells and the endometrial cancer KLE cell line by immunocytochemistry, and the association between PDCD4 expression and clinicopathological parameters of patients with EEC was analyzed. The results demonstrated that PDCD4-positive staining was mainly located in the cytoplasm of endometrial glandular epithelial cells and EEC cells. The staining index of PDCD4 in the proliferative phase was significantly increased compared with that in the secretory phase of control endometrium (P<0.001). There was significantly decreased PDCD4 expression in grade (G) 2/3 EEC tissues compared with the proliferative phase of control endometrium (P<0.001). PDCD4 expression was significantly associated with tumor grade. The PDCD4 levels in G1 EEC tissues were higher compared with the G2/3 EEC group (P<0.01). The results indicated that PDCD4 is associated with the histological grade of EEC, and that PDCD4 may be a valuable indicator of the degree of tumor malignancy in patients with EEC.
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Affiliation(s)
- Yanping Liu
- Department of Gynecology and Obstetrics, Shandong University School of Medicine, Jinan, Shandong 250012, P.R. China
| | - Han Sun
- Department of Immunology, Shandong University School of Medicine, Jinan, Shandong 250012, P.R. China.,Department of Clinical Laboratory Services, Linyi People's Hospital, Linyi, Shandong 276000, P.R. China
| | - Hongju Mao
- Department of Infection, Jinan Central Hospital Affiliated to Shandong University, Jinan, Shandong 250013, P.R. China
| | - Meng Gao
- Department of Immunology, Shandong University School of Medicine, Jinan, Shandong 250012, P.R. China
| | - Xiao Tan
- Department of Pathology, The People's Hospital of Linyi City, Linyi, Shandong 276000, P.R. China
| | - Yue Li
- Department of Immunology, Shandong University School of Medicine, Jinan, Shandong 250012, P.R. China
| | - Yan Li
- Department of Immunology, Shandong University School of Medicine, Jinan, Shandong 250012, P.R. China
| | - Guy Mutangala Muloye
- Department of Gynecology and Obstetrics, Shandong University School of Medicine, Jinan, Shandong 250012, P.R. China
| | - Lining Zhang
- Department of Immunology, Shandong University School of Medicine, Jinan, Shandong 250012, P.R. China
| | - Xiaoyan Wang
- Department of Immunology, Shandong University School of Medicine, Jinan, Shandong 250012, P.R. China
| | - Zengtao Wei
- Department of Gynecology and Obstetrics, Shandong University School of Medicine, Jinan, Shandong 250012, P.R. China.,Department of Gynecology and Obstetrics, Jinan Central Hospital Affiliated to Shandong University, Jinan, Shandong 250013, P.R. China
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10
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Eismann J, Hirschfeld M, Erbes T, Rücker G, Jäger M, Ritter A, Weiss D, Gitsch G, Mayer S. Hypoxia- and acidosis-driven aberrations of secreted microRNAs in endometrial cancer in vitro. Oncol Rep 2017. [PMID: 28627686 DOI: 10.3892/or.2017.5717] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Due to their post-transcriptional regulatory impact on gene expression, microRNAs (miRNA, miRs) influence decisively cellular processes of differentiation, proliferation and apoptosis. In oncogenic pathways various miRNAs exert either oncogenic or tumor suppressor activities in a stage-specific manner. Dysregulation of miRNA expression pattern has been associated with several human cancers including endometrial cancer (EC). In the present study, expression profile alterations of EC associated secreted miRNAs were determined under the microenvironmental stress situations hypoxia and acidosis occurring in tumor progression and metastasis. The potential influence of hypoxia and acidosis vs. control conditions on the expression levels of 24 EC-relevant miRNA types was quantitatively accessed via real-time PCR in three established EC in vitro models. Expression data were analyzed statistically. In vitro application of hypoxia resulted in downregulation of miR-15a, miR-20a, miR-20b and miR-128-1 in Ishikawa cells (type I EC) and upregulation of miR-21 in EFE-184 cells (type I EC). Acidosis triggered upregulation of tumor promoting miR-125b in AN3-CA cell (type II EC), whereas in Ishikawa cells (type I EC) miRNAs with tumor suppressive function were found altered in divergent directions, both up- (let-7a) and down- (miR-22) regulated. Our current findings emphasize the functional importance of secreted miRNAs in the immediate response of EC cells to exogenic stress situations such as the typical tumor epiphenomena hypoxia and acidosis. Focusing on the specific potential of secreted, thus circulating miRNA molecules, alterations in expression levels not only influence intracellular gene expression and signaling cascades, but also transfer the induction of (tumor)biological cellular changes to adjacent cells.
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Affiliation(s)
- Julia Eismann
- Department of Obstetrics and Gynecology, Medical Center - University of Freiburg, Freiburg, Germany
| | - Marc Hirschfeld
- Department of Obstetrics and Gynecology, Medical Center - University of Freiburg, Freiburg, Germany
| | - Thalia Erbes
- Department of Obstetrics and Gynecology, Medical Center - University of Freiburg, Freiburg, Germany
| | - Gerta Rücker
- Institute for Medical Biometry and Statistics, Medical Center - University of Freiburg, Freiburg, Germany
| | - Markus Jäger
- Department of Obstetrics and Gynecology, Medical Center - University of Freiburg, Freiburg, Germany
| | - Andrea Ritter
- Department of Obstetrics and Gynecology, Medical Center - University of Freiburg, Freiburg, Germany
| | - Daniela Weiss
- Department of Obstetrics and Gynecology, Medical Center - University of Freiburg, Freiburg, Germany
| | - Gerald Gitsch
- Department of Obstetrics and Gynecology, Medical Center - University of Freiburg, Freiburg, Germany
| | - Sebastian Mayer
- Department of Obstetrics and Gynecology, Medical Center - University of Freiburg, Freiburg, Germany
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11
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Wongnoppavich A, Dukaew N, Choonate S, Chairatvit K. Upregulation of maspin expression in human cervical carcinoma cells by transforming growth factor β1 through the convergence of Smad and non-Smad signaling pathways. Oncol Lett 2017; 13:3646-3652. [PMID: 28521467 PMCID: PMC5431325 DOI: 10.3892/ol.2017.5939] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 01/31/2017] [Indexed: 01/08/2023] Open
Abstract
Mammary serine protease inhibitor (maspin), encoded by the serpin family B member 5 gene, serves as a tumor suppressor through the inhibition of cancer cell invasion and metastasis. Paradoxically, maspin levels are upregulated in a number of types of malignant cells. Therefore, the regulation of maspin expression may depend on the genetic or epigenetic background and the specific microenvironment of carcinoma cells. In the present study, it was demonstrated that transforming growth factor β1 (TGF-β1) induced maspin expression at the transcript and protein levels in the human cervical carcinoma HeLa and human oral squamous carcinoma HSC4 cell lines. The inhibition of the mothers against decapentaplegic homolog (Smad)-dependent pathway by a Smad3-specific inhibitor suppressed maspin induction by TGF-β1 in HeLa cells. Inhibition of the non-Smad pathway by pretreatment with the mitogen-activated protein kinase kinase 1/2 (MEK1/2) inhibitor U0126, or the p38 mitogen-activated protein kinase (p38 MAPK) inhibitor SB202190, attenuated the effect of TGF-β1 on maspin upregulation, whereas pretreatment with pyrrolidine dithiocarbamate (a nuclear factor κB inhibitor), wortmannin (a phosphoinositide 3-kinase inhibitor) or SP600125 (a c-Jun N-terminal kinase inhibitor) did not. Notably, none of these inhibitors eliminated the TGF-β1-induced phosphorylation of Smad2. In addition, mutations at p53-binding sites in the maspin promoter suppressed TGF-β1-induced maspin expression, indicating the necessity of intact p53-binding sites on the maspin promoter. In summary, the induction of maspin expression in HeLa cells requires the convergence of TGF-β1-induced Smad and non-Smad signaling pathways, in which the latter acts via the intermediate signaling molecules MEK1/2 and p38 MAPK.
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Affiliation(s)
- Ariyaphong Wongnoppavich
- Department of Biochemistry, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Nahathai Dukaew
- Department of Biochemistry, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Sirinthip Choonate
- Department of Oral Biology, Faculty of Dentistry, Mahidol University, Bangkok 10400, Thailand
| | - Kongthawat Chairatvit
- Department of Oral Biology, Faculty of Dentistry, Mahidol University, Bangkok 10400, Thailand
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Zhang HH, Qi F, Cao YH, Zu XB, Chen MF. Expression and clinical significance of microRNA-21, maspin and vascular endothelial growth factor-C in bladder cancer. Oncol Lett 2015; 10:2610-2616. [PMID: 26622898 DOI: 10.3892/ol.2015.3540] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 06/22/2015] [Indexed: 01/04/2023] Open
Abstract
The present study aimed to explore the expression and clinical significance of microRNA-21 (miR-21), maspin and vascular endothelial growth factor C (VEGF-C) in bladder cancer (BC). A total of 53 BC samples and 12 normal bladder tissue samples were collected. Total messenger RNA (mRNA) was extracted, and reverse transcription-quantitative polymerase chain reaction (RT-qPCR) was used to evaluate the expression of miR-21 and maspin in BC and normal bladder tissues. Immunohistochemistry was used for the detection of maspin and VEGF-C protein expression. Furthermore, the correlations between these molecules and certain clinicopathological parameters were investigated, and survival analysis was performed to assess their prognostic significance. miR-21 mRNA expression and VEGF-C protein expression were increased in BC tissues compared with those in normal bladder tissues, whereas maspin mRNA and protein expression levels in BC tissues were significantly decreased (P<0.01). miR-21, maspin and VEGF-C expression were significantly associated with the stage, grade and lymph node metastasis of BC (P<0.05), but not the other clinicopathological features evaluated. There was a marked inverse correlation between the mRNA expression of miR-21 and maspin, with a coefficient of -0.978 (P<0.001). Similarly, there was a significant inverse correlation between the protein expression of maspin and VEGF-C, with a coefficient of -0.589 (P<0.001). Overexpression of miR-21 and VEGF-C, as well as decreased maspin expression, were associated with a poorer prognosis. These results suggested that upregulation of miR-21, decreased maspin expression and enhanced VEGF-C in BC may promote tumor progression. miR-21, maspin and VEGF-C may therefore have significant roles as biomarkers for prognosis and as therapeutic targets of BC.
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Affiliation(s)
- Hui-Hui Zhang
- Department of Urology, The First Affiliated Hospital of University of South China, Hengyang, Hunan 421001, P.R. China
| | - Fan Qi
- Department of Urology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - You-Han Cao
- Department of Urology, The First Affiliated Hospital of University of South China, Hengyang, Hunan 421001, P.R. China
| | - Xiong-Bing Zu
- Department of Urology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Min-Feng Chen
- Department of Urology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
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Sianou A, Galyfos G, Moragianni D, Andromidas P, Kaparos G, Baka S, Kouskouni E. The role of microRNAs in the pathogenesis of endometrial cancer: a systematic review. Arch Gynecol Obstet 2015; 292:271-82. [PMID: 25697925 DOI: 10.1007/s00404-015-3660-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Accepted: 02/09/2015] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Epigenetics seem to play a primary role in the current research on the pathogenesis of different types of endometrial cancer. Data so far indicate that microRNAs regulate different pathways that could lead to carcinogenesis when not functioning properly. The aim of this review is to summarize current knowledge on microRNAs that have been associated with endometrial cancer development. MATERIAL AND METHODS From July 2014 to August 2014, we conducted a comprehensive research utilizing major online search engines (Pubmed, Crossref, Google Scholar). The main keywords used in our search were endometrial cancer/carcinoma; microRNA; epigenetics; novel biomarkers; pathogenesis. RESULTS Overall, we identified 155 studies, although only 77 were eligible for this review. Different miRNAs were identified to contribute either promoting the carcinogenesis in the endometrium or inhibiting different steps of endometrial cancer development. Tumour growth, cell proliferation, apoptosis and invasion metastasis have been identified as the main processes where miRNAs seem to be implicated. CONCLUSIONS microRNAs are effective regulators of gene expression that has a significant role in the pathogenesis of endometrial cancer. Research concerning possible therapeutic implications has been promising, although there is still a significant distance to be covered between research observations and clinical results. Extensive preclinical and translational research is still required to improve the efficacy and minimize unwanted effects of miRNAs-based therapy.
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Affiliation(s)
- Argiri Sianou
- Department of Microbiology, Areteion Hospital, University of Athens Medical School, Athens, Greece,
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Chill HH, Dior UP, Kogan L, Revel A. microRNAs and Endometrial Pathophysiology. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 887:143-55. [PMID: 26662990 DOI: 10.1007/978-3-319-22380-3_8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Embryo implantation requires a reciprocal interaction between the blastocyst and endometrium and is associated with complex regulatory mechanisms. Since their discovery, microRNAs became prominent candidates providing missing links for many biological pathways. In recent years, microRNAs were implicated as one of the important players in regulation of various biological and physiological endometrial related processes. This chapter aims to present recent knowledge pertaining to the diverse aspects of microRNAs in the embryo-endometrial relationship. We will focus on the role of microRNAs in decidualization and their part in natural and stimulated cycles. Next, we will present recent studies deliberating the role of microRNAs in recurrent pregnancy loss and in the important phenomenon of recurrent implantation failure. Lastly, demonstrating an important aspect of embryo implantation and invasion, we will outline few microRNA related shared pathways of implantation and carcinogenesis.
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Affiliation(s)
- Henry H Chill
- Department of Obstetrics and Gynecology, The Hebrew University-Hadassah Medical Center, POB 12272, Jerusalem, 91120, Israel.
| | - Uri P Dior
- Department of Obstetrics and Gynecology, The Hebrew University-Hadassah Medical Center, POB 12272, Jerusalem, 91120, Israel
| | - Liron Kogan
- Department of Obstetrics and Gynecology, The Hebrew University-Hadassah Medical Center, POB 12272, Jerusalem, 91120, Israel
| | - Ariel Revel
- Department of Obstetrics and Gynecology, The Hebrew University-Hadassah Medical Center, POB 12272, Jerusalem, 91120, Israel
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Fukushima Y, Iinuma H, Tsukamoto M, Matsuda K, Hashiguchi Y. Clinical significance of microRNA-21 as a biomarker in each Dukes' stage of colorectal cancer. Oncol Rep 2014; 33:573-82. [PMID: 25421755 DOI: 10.3892/or.2014.3614] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Accepted: 10/06/2014] [Indexed: 12/14/2022] Open
Abstract
The potential value of microRNAs (miRNAs) as prognostic biomarkers are of interest. It is known that microRNA-21 (miR-21) is implicated in the promotion, proliferation and progression of several types of human cancers. However, the prognostic significance of miR-21 in each tumor stage of colorectal cancer (CRC) remains elusive. The objective of this study was to clarify the prognostic value of miR-21 for CRC patients at each tumor stage. The expression levels of miR-21 in the tumor tissues and normal adjacent tumor tissues of 306 CRC patients were determined by TaqMan microRNA assays. In order to clarify the miRNA profile in CRC tissues, miRNA arrays were examined. In this analysis, miR-21, miR-224, miR-96, miR-31 and miR-155 showed marked upregulation, and miR-21 showed the highest level. Upon comparison of clinicopathological factors, miR-21 expression showed significant association with depth of invasion, lymphatic and venous invasion, liver metastasis and Dukes' stage. In the Kaplan-Meier survival curve analysis of all patients, overall survival (OS) and disease-free survival (DFS) rates of the patients with high miR-21 expression were significantly worse than these rates in patients with low miR-21 expression. In the Kaplan-Meier analysis of each tumor stage, the DFS of patients with high miR-21 expression was significantly worse than patients with low miR-21 levels in Dukes' stage A tumors. In Dukes' stage B and C, patients with high miR-21 expression showed a significantly worse OS and DFS than patients with low miR-21 expression. In Dukes' stage D, patients with high miR-21 expression showed a significantly worse OS than patients with low miR-21 expression. In the Cox multivariate analysis, it was shown that miR-21 expressions in CRC tissues is an independent prognostic factor in Dukes' stage B, C and D. In conclusion, miR-21 expression may be a valuable biomarker for prediction of poor prognosis in CRC patients with Dukes' stage B, C and D.
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Affiliation(s)
- Yoshihisa Fukushima
- Department of Surgery, Teikyo University School of Medicine, Itabashi-ku, Tokyo 173-0003, Japan
| | - Hisae Iinuma
- Department of Surgery, Teikyo University School of Medicine, Itabashi-ku, Tokyo 173-0003, Japan
| | - Mitsuo Tsukamoto
- Department of Surgery, Teikyo University School of Medicine, Itabashi-ku, Tokyo 173-0003, Japan
| | - Keiji Matsuda
- Department of Surgery, Teikyo University School of Medicine, Itabashi-ku, Tokyo 173-0003, Japan
| | - Yojiro Hashiguchi
- Department of Surgery, Teikyo University School of Medicine, Itabashi-ku, Tokyo 173-0003, Japan
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Song MS, Rossi JJ. The anti-miR21 antagomir, a therapeutic tool for colorectal cancer, has a potential synergistic effect by perturbing an angiogenesis-associated miR30. Front Genet 2014; 4:301. [PMID: 24427170 PMCID: PMC3877768 DOI: 10.3389/fgene.2013.00301] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Accepted: 12/09/2013] [Indexed: 12/13/2022] Open
Abstract
Colon cancer has the third highest incidence and mortality among cancers in the United States. MicroRNA-21 (miR21) has been described as an oncomir that is highly overexpressed in tumor tissue from colorectal cancer. Recent studies showed that silencing of miR21 through use of a miR21 inhibitor (anti-miR21) affected viability, apoptosis and the cell cycle in colon cancer cells. We identified an anti-miR21 that targets miR21 to inhibit genes by both post-transcriptional gene silencing and transcriptional gene silencing in the cytoplasm and nucleus, respectively. Overexpression of anti-miR21 in colon cancer cells caused changes in miRNA expression levels. We found that treatment with anti-miR21 down-regulated expression of miR30, which is involved in angiogenesis. In an in vitro angiogenesis assay, network formation induced by an angiogenesis activator was reduced upon treatment with anti-miR21. Sequence analysis of anti-miR21 and pri-miR30 revealed homology between anti-miR21 and the 3′ end of pri-miR30, suggesting that anti-miR21 may bind to pri-miR30 and block processing of the miRNA processing. These results suggest anti-miR21 has a role not only in tumor growth but also in angiogenesis. Therefore, treatment with the anti-miR21 antagomir may have a synergistic effect mediated through suppression of miR30.
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Affiliation(s)
- Min-Sun Song
- Department of Molecular and Cellular Biology, Beckman Research Institute of City of Hope City of Hope, Duarte, CA, USA
| | - John J Rossi
- Department of Molecular and Cellular Biology, Beckman Research Institute of City of Hope City of Hope, Duarte, CA, USA ; Irell and Manella Graduate School of Biological Sciences, Beckman Research Institute of City of Hope City of Hope, Duarte, CA, USA
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Li BL, Lu W, Lu C, Qu JJ, Yang TT, Yan Q, Wan XP. CpG island hypermethylation-associated silencing of microRNAs promotes human endometrial cancer. Cancer Cell Int 2013; 13:44. [PMID: 23680357 PMCID: PMC3661352 DOI: 10.1186/1475-2867-13-44] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2013] [Accepted: 05/12/2013] [Indexed: 01/01/2023] Open
Abstract
Background Endometrial cancer (EC) is the most common gynecologic malignancy, but the molecular events involved in the development and progression of EC remain unclear. This study aimed to explore epigenetic modification of genes and miRNAs involved in EC development. Methods Ishikawa and AN3CA cells were treated with 5’-Aza-2-deoxycytidine or histone deacetylase inhibitor. The expression of miRNAs and related genes were detected by PCR and Western blot. Promoter methylation was detected by bisulfite specific PCR sequencing. The proliferation, colony formation, cell cycle progression, migration and invasion of EC cells were evaluated by MTT, soft agar assay, flow cytometry, wound healing and invasion assay, respectively. Results Aberrant expression of miRNAs including miR-200b, miR-130a/b, miR-625 and miR-222 was associated with tumorigenesis and metastasis in endometrial cancer. Silencing of miR-130b induced E-cadherin expression, while ectopic expression of miR-130b and knockdown of DICER1 increased the expression of Vimentin, zeb2, N-cadherin, Twist and Snail in EC cells. Furthermore, 5’-Aza-2-deoxycytidine and Histone deacetylase (HDAC) inhibitor inhibited the proliferation, colony formation, migration and invasion of EC cells, accompanied by reduced MMP secretion. Conclusions Our study provides the first description of epigenetic modification of epithelial mesenchymal transition associated genes and miRNAs in EC cells, which are extensively involved in the regulation of gene expression and subsequent accumulation of malignant features of EC cells.
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Affiliation(s)
- Bi-Lan Li
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 650 New Songjiang Road, Shanghai 201620, China.
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Kowalewska M, Bakula-Zalewska E, Chechlinska M, Goryca K, Nasierowska-Guttmejer A, Danska-Bidzinska A, Bidzinski M. microRNAs in uterine sarcomas and mixed epithelial-mesenchymal uterine tumors: a preliminary report. Tumour Biol 2013; 34:2153-60. [PMID: 23558962 PMCID: PMC3713270 DOI: 10.1007/s13277-013-0748-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Accepted: 03/13/2013] [Indexed: 01/16/2023] Open
Abstract
Uterine sarcomas and mixed epithelial–mesenchymal uterine tumors are a heterogeneous group of rare tumors for which there are very few diagnostic markers available. As aberrant microRNA (miRNA) expression patterns represent putative diagnostic cancer markers, we aimed to identify miRNA expression profiles of the major uterine sarcoma subtypes and mixed epithelial–mesenchymal tumors of the uterus. Eighty-eight miRNAs were assessed by quantitative RT-PCR in cancerous and non-cancerous tissue samples collected from 29 patients with endometrial sarcoma, leiomyosarcoma, and mixed epithelial–mesenchymal tumors. Tumor and control samples significantly (P < 0.05) differed in the expression of miR-23b, miR-1, let-7f, and let-7c in endometrial sarcomas, and miR-1, let-7c, miR-133b, let-7b, miR-143, let-7a, let-7d, let-7e, let-7g, miR-222, let-7i, and miR-214 in mixed epithelial–mesenchymal tumors. All the significantly changed miRNAs were down-regulated in the malignant tissues as compared to their normal counterparts. This may suggest their tumor suppressor role in these malignancies. No statistically significant changes in miRNA expression levels were found between leiomyosarcoma tumors and controls. The identified miRNAs warrant further studies as valuable candidate markers for the differential diagnosis of uterine sarcomas from benign uterine lesions and between uterine sarcoma subtypes.
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Affiliation(s)
- Magdalena Kowalewska
- Department of Molecular Biology, Maria Sklodowska-Curie Memorial Cancer Centre and Institute of Oncology, Roentgena 5, 02-781, Warsaw, Poland.
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Clinical correlations of miR-21 expression in colorectal cancer patients and effects of its inhibition on DLD1 colon cancer cells. Int J Colorectal Dis 2012; 27:1401-8. [PMID: 22476768 DOI: 10.1007/s00384-012-1461-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/09/2012] [Indexed: 02/04/2023]
Abstract
PURPOSE MicroRNA-21 (miR-21) is one of the miRNAs that are frequently and highly overexpressed in tumor tissue of colorectal cancer (CRC) patients; however, only a little is known about its functional role in CRC. METHODS We examined the expression level of miR-21 in 44 paired samples of tumoral and non-tumoral colon tissues diagnosed for CRC using TaqMan real-time PCR method. Furthermore, we used miR-21 inhibitor (anti-miR-21) to transient knockdown of miR-21 in DLD-1 colon cancer cells and examined the effects of miR-21 silencing on viability, apoptosis, chemosensitivity, cell cycle, and migration of DLD1 cells. RESULTS The expression levels of miR-21 were significantly increased in CRC tumor tissue (P < 0.0001). Significant differences in miR-21 levels were observed also between CRC tissues of patients with CRC in different clinical stages: I vs. II (P = 0.033) and I vs. IV (P = 0.021). Kaplan-Meier analysis proved that the miR-21 expression levels are correlated to shorter overall survival of CRC patients (P = 0.0341). MiR-21 silencing in DLD1 cell line had no effect on the cell viability; however, when combined with chemotherapeutics (5-FU, L-OHP, and SN38), it contributed to the decrease of cell viability. Suppression of miR-21 decreased cell migration ability of DLD-1 cells by nearly 30 % (P = 0.016). CONCLUSION We have confirmed the overexpression of miR-21 in CRC samples and its correlation with advanced disease and shorter overall survival. These findings could be described in part by the fact that CRC cells with increased expression of miR-21 have higher migration ability.
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Qin X, Yan L, Zhao X, Li C, Fu Y. microRNA-21 overexpression contributes to cell proliferation by targeting PTEN in endometrioid endometrial cancer. Oncol Lett 2012; 4:1290-1296. [PMID: 23226804 DOI: 10.3892/ol.2012.896] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 06/28/2012] [Indexed: 12/27/2022] Open
Abstract
The aim of this study was to investigate the role of microRNA-21 (miR-21) in the regulation of phosphatase and tensin homolog deleted from chromosome-10 (PTEN) expression and proliferation of endometrioid endometrial cancer (EEC) cells. We performed a qRT-PCR assay with miR-21 and PTEN in 16 paired EEC tumor tissues and adjacent non-tumor endometrium. To investigate the regulation of PTEN by miR-21, we designed gain- and loss-of-function of miR-21 experiments in the KLE cell line by transfection with a synthetic miR-21 mimic and inhibitor. To validate the putative binding site of miR-21 in the 3' untranslated region (3'-UTR) of PTEN messenger RNA (mRNA), a dual-luciferase reporter assay was carried out. To evaluate the potential effect of miR-21 on EEC proliferation, we performed both overexpression experiments, using an miR-21 mimic, and inhibition assays, using an miR-21 inhibitor. miR-21 was overexpressed in EEC and was inversely correlated with PTEN protein expression (P<0.001). miR-21 regulated PTEN protein expression and cell proliferation in the KLE cell line and the direct binding of miR-21 to the PTEN 3'-UTR was confirmed using a dual-luciferase reporter assay. The upregulation of miR-21 led to a significant decrease in the PTEN protein expression level (P=0.007). The downregulation of miR-21 led to a significant increase in PTEN protein (P=0.002). The expression of luciferase in the wt-PTEN-3'-UTR-pGL3 group was downregulated in the presence of the miR-21 mimic (P=0.001). miR-21 was overexpressed in EEC. In conclusion, we demonstrated that the expression of PTEN protein, but not mRNA, was negatively directly regulated by miR-21 in the KLE cell line. The overexpression of miR-21 modulated EEC cell proliferation through the downregulation of PTEN.
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Affiliation(s)
- Xiaoyan Qin
- Department of Obstetrics and Gynaecology, Provincial Hospital Affiliated to Shandong University, Jinan 250021, P.R. China
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