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Garcia-Borja E, Siegl F, Mateu R, Slaby O, Sedo A, Busek P, Sana J. Critical appraisal of the piRNA-PIWI axis in cancer and cancer stem cells. Biomark Res 2024; 12:15. [PMID: 38303021 PMCID: PMC10836005 DOI: 10.1186/s40364-024-00563-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 01/15/2024] [Indexed: 02/03/2024] Open
Abstract
Small noncoding RNAs play an important role in various disease states, including cancer. PIWI proteins, a subfamily of Argonaute proteins, and PIWI-interacting RNAs (piRNAs) were originally described as germline-specific molecules that inhibit the deleterious activity of transposable elements. However, several studies have suggested a role for the piRNA-PIWI axis in somatic cells, including somatic stem cells. Dysregulated expression of piRNAs and PIWI proteins in human tumors implies that, analogously to their roles in undifferentiated cells under physiological conditions, these molecules may be important for cancer stem cells and thus contribute to cancer progression. We provide an overview of piRNA biogenesis and critically review the evidence for the role of piRNA-PIWI axis in cancer stem cells. In addition, we examine the potential of piRNAs and PIWI proteins to become biomarkers in cancer.
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Affiliation(s)
- Elena Garcia-Borja
- Laboratory of Cancer Cell Biology, Institute of Biochemistry and Experimental Oncology, First Faculty of Medicine, Charles University, U Nemocnice 478/5, Prague 2, 128 53, Czech Republic
| | - Frantisek Siegl
- Central European Institute of Technology, Masaryk University, Kamenice 753/5, Brno, 625 00, Czech Republic
- Department of Biochemistry, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Rosana Mateu
- Laboratory of Cancer Cell Biology, Institute of Biochemistry and Experimental Oncology, First Faculty of Medicine, Charles University, U Nemocnice 478/5, Prague 2, 128 53, Czech Republic
| | - Ondrej Slaby
- Central European Institute of Technology, Masaryk University, Kamenice 753/5, Brno, 625 00, Czech Republic
- Department of Biology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Aleksi Sedo
- Laboratory of Cancer Cell Biology, Institute of Biochemistry and Experimental Oncology, First Faculty of Medicine, Charles University, U Nemocnice 478/5, Prague 2, 128 53, Czech Republic
| | - Petr Busek
- Laboratory of Cancer Cell Biology, Institute of Biochemistry and Experimental Oncology, First Faculty of Medicine, Charles University, U Nemocnice 478/5, Prague 2, 128 53, Czech Republic.
| | - Jiri Sana
- Central European Institute of Technology, Masaryk University, Kamenice 753/5, Brno, 625 00, Czech Republic.
- Department of Comprehensive Cancer Care, Masaryk Memorial Cancer Institute, Brno, Czech Republic.
- Department of Pathology, University Hospital Brno, Brno, Czech Republic.
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Forghanifard MM, Salehi S. Co-overexpression of self-renewal markers SALL4 and HIWI is correlated with depth of tumor invasion and metastasis in colorectal cancer. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2022. [DOI: 10.1186/s43042-022-00333-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
SALL4 and HIWI are involved in the maintenance of self-renewal capacity of stem cells. Several scrutinizes have demonstrated that SALL4 and HIWI play a key role in cancer development. However, the correlation between these genes regarding different clinicopathological features of patients with colorectal cancer (CRC) is still unclear.
Methods
The expression of SALL4 and HIWI in different clinicopathological features of 46 CRC patients was analyzed using relative comparative real-time PCR.
Results
mRNA expression levels of SALL4 and HIWI genes were significantly correlated with each other in CRC (P = 0.013, Pearson correlation = 0.364). HIWI expression was notably increased in tumors with overexpression of SALL4 in comparison with other samples. This correlation was significant in non-metastatic CRCs compared to the metastatic tumors and in invaded tumors to the serosa (T3/T4) in comparison with non-invaded tumors (T1/T2).
Conclusions
Based on the significant association of SALL4 and HIWI in different indices of CRC poor prognosis, it may be concluded that simultaneous expression of these genes is notably contributed to the growth and development of the disease, and therefore, their co-overexpression may be considered for prognosis of aggressive CRCs.
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Elevated P-Element-Induced Wimpy-Testis-Like Protein 1 Expression Predicts Unfavorable Prognosis for Patients with Various Cancers. JOURNAL OF ONCOLOGY 2022; 2021:9982192. [PMID: 35003260 PMCID: PMC8741353 DOI: 10.1155/2021/9982192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 12/07/2021] [Accepted: 12/10/2021] [Indexed: 12/24/2022]
Abstract
Increasing evidence has shown that overexpression of P-element-induced wimpy-testis (PIWI)-like protein 1 (PIWIL1) was associated with unfavorable prognosis of patients with various types of cancers. Herein, we conducted this meta-analysis to identify the clinicopathological and prognostic value of the PIWIL1 expression in cancers. Three electronic databases (PubMed, Web of Science, and Embase) were comprehensively retrieved for relevant studies up to August 4th, 2019. RevMan 5.3 and STATA 12.0 statistical software programs were used to explore the relationships between PIWIL1 expression and the prognosis and clinicopathological features in cancer patients. A total of 13 studies recruiting 2179 patients with 9 types of solid tumors were finally included in the meta-analysis. The results indicated that patients with high PIWIL1 expression tended to have a shorter survival, and additionally deeper tumor invasion, higher clinical stage, and more lymph node metastasis. PIWIL1 could serve as a biomarker for prognosis and clinicopathological characteristics in various cancers.
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Keeping your options open: insights from Dppa2/4 into how epigenetic priming factors promote cell plasticity. Biochem Soc Trans 2021; 48:2891-2902. [PMID: 33336687 PMCID: PMC7752079 DOI: 10.1042/bst20200873] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 12/01/2020] [Accepted: 12/02/2020] [Indexed: 12/12/2022]
Abstract
The concept of cellular plasticity is particularly apt in early embryonic development, where there is a tug-of-war between the stability and flexibility of cell identity. This balance is controlled in part through epigenetic mechanisms. Epigenetic plasticity dictates how malleable cells are to change by adjusting the potential to initiate new transcriptional programmes. The higher the plasticity of a cell, the more readily it can adapt and change its identity in response to external stimuli such as differentiation cues. Epigenetic plasticity is regulated in part through the action of epigenetic priming factors which establish this permissive epigenetic landscape at genomic regulatory elements to enable future transcriptional changes. Recent studies on the DNA binding proteins Developmental Pluripotency Associated 2 and 4 (Dppa2/4) support their roles as epigenetic priming factors in facilitating cell fate transitions. Here, using Dppa2/4 as a case study, the concept of epigenetic plasticity and molecular mechanism of epigenetic priming factors will be explored. Understanding how epigenetic priming factors function is key not only to improve our understanding of the tight control of development, but also to give insights into how this goes awry in diseases of cell identity, such as cancer.
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Wang J, Zhuang H, Zhang H, Li Q, Cao X, Lin Z, Lin T, Chen X, Ni X, Yang J, Zhao Y, Shen L, Wang H, Zhu J, Ye M, Jin X. SPOP suppresses testicular germ cell tumors progression through ubiquitination and degradation of DPPA2. Biochem Biophys Res Commun 2021; 557:55-61. [PMID: 33862460 DOI: 10.1016/j.bbrc.2021.04.002] [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: 03/31/2021] [Accepted: 04/01/2021] [Indexed: 10/21/2022]
Abstract
Dysregulation of the ubiquitin-proteasome pathway is strongly associated with cancer initiation and progression. Speckle-type POZ(pox virus and zinc finger protein) protein(SPOP) is an adapter protein of CUL3-based E3 ubiquitin ligase complexes. Gene expression profiling from the Cancer Genome Atlas (TCGA) suggests that SPOP is downregulated in testicular germ cell tumors (TGCTs), but the specific contribution of this protein remains to be explored. In this study, we show that the germ line-specific factor DPPA2 was identified as a proteolytic substrate for the SPOP-CUL3-RBX1 E3 ubiquitin-ligase complex. SPOP specifically binds to a SPOP-binding consensus (SBC) degron located in DPPA2 and targets DPPA2 for degradation via the ubiquitin-proteasome pathway. SPOP downregulation increases the expression of pluripotency markers OCT4 and Nanog but decreases that of early differentiation marker gene Fst. This effect is partly dependent on its activity toward DPPA2. In addition, the dysregulation of SPOP-DPPA2 axis contributes to the malignant transformation phenotypes of TGCT cells.
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Affiliation(s)
- Jian Wang
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, 315020, China; Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, 315211, China
| | - Hui Zhuang
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, 315020, China; Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, 315211, China
| | - Hui Zhang
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, 315020, China; Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, 315211, China
| | - Qian Li
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, 315020, China; Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, 315211, China
| | - Xinyi Cao
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, 315020, China; Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, 315211, China
| | - Zihan Lin
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, 315020, China; Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, 315211, China
| | - Ting Lin
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, 315020, China; Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, 315211, China
| | - Xiwei Chen
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, 315020, China; Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, 315211, China
| | - Xiaoqi Ni
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, 315020, China; Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, 315211, China
| | - Jianye Yang
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, 315020, China; Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, 315211, China
| | - Yiting Zhao
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, 315020, China; Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, 315211, China
| | - Liliang Shen
- Department of Urology, Yinzhou Renmin Hospital Affiliated to Medical School of Ningbo University, Ningbo, 315040, China
| | - Haibiao Wang
- Department of Hepato-biliary-pancreatic Surgery, The Affiliated Ningbo Medical Center of LiHuiLi Hospital of Medical School of Ningbo University, Ningbo, 315048, China
| | - Jie Zhu
- Department of Hepato-biliary-pancreatic Surgery, The Affiliated Ningbo Medical Center of LiHuiLi Hospital of Medical School of Ningbo University, Ningbo, 315048, China
| | - Meng Ye
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, 315020, China; Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, 315211, China
| | - Xiaofeng Jin
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, 315020, China; Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, 315211, China.
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Hennig EE, Kluska A, Piątkowska M, Kulecka M, Bałabas A, Zeber-Lubecka N, Goryca K, Ambrożkiewicz F, Karczmarski J, Olesiński T, Zyskowski Ł, Ostrowski J. GWAS Links New Variant in Long Non-Coding RNA LINC02006 with Colorectal Cancer Susceptibility. BIOLOGY 2021; 10:biology10060465. [PMID: 34070617 PMCID: PMC8229782 DOI: 10.3390/biology10060465] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 05/11/2021] [Accepted: 05/20/2021] [Indexed: 01/10/2023]
Abstract
Simple Summary Identifying risk factors for cancer development can allow for appropriate stratification and surveillance of individuals at risk, increasing their chances of benefiting from early disease detection; however, most of the genetic factors contributing to the risk of colorectal cancer (CRC) remain undetermined. Here, we adopted a new approach for selecting index polymorphism for further validation in combination with a genome-wide association study of pooled DNA samples for CRC susceptibility variants in the Polish population. This study, including 2013 patients and controls, uncovered five susceptibility loci not previously reported for CRC. Four of identified variants were located within genes likely involved in tumor invasiveness and metastasis, suggesting that they could be markers of poor prognosis in CRC patients. Our results provide evidence that conducting association studies on small but homogenous populations can help us discover new common risk variants specific to the studied population. Abstract Despite great efforts, most of the genetic factors contributing to the risk of colorectal cancer (CRC) remain undetermined. Including small but homogenous populations in genome-wide association studies (GWAS) can help us discover new common risk variants specific to the studied population. In this study, including 465 CRC patients and 1548 controls, a pooled DNA samples-based GWAS was conducted in search of genetic variants associated with CRC in a Polish population. Combined with a new method of selecting single-nucleotide polymorphisms (SNPs) for verification in individual DNA samples, this approach allowed the detection of five new susceptibility loci not previously reported for CRC. The discovered loci were found to explain 10% of the overall risk of developing CRC. The strongest association was observed for rs10935945 in long non-coding RNA LINC02006 (3q25.2). Three other SNPs were also located within genes (rs17575184 in NEGR1, rs11060839 in PIWIL1, rs12935896 in BCAS3), while one was intergenic (rs9927668 at 16p13.2). An expression quantitative trait locus (eQTL) bioinformatic analysis suggested that these polymorphisms may affect transcription factor binding sites. In conclusion, four of the identified variants were located within genes likely involved in tumor invasiveness and metastasis. Therefore, they could possibly be markers of poor prognosis in CRC patients.
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Affiliation(s)
- Ewa E. Hennig
- Department of Gastroenterology, Hepatology and Clinical Oncology, Centre of Postgraduate Medical Education, 02-781 Warsaw, Poland; (M.K.); (N.Z.-L.); (J.O.)
- Department of Genetics, Maria Skłodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.K.); (M.P.); (A.B.); (K.G.); (F.A.); (J.K.)
- Correspondence:
| | - Anna Kluska
- Department of Genetics, Maria Skłodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.K.); (M.P.); (A.B.); (K.G.); (F.A.); (J.K.)
| | - Magdalena Piątkowska
- Department of Genetics, Maria Skłodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.K.); (M.P.); (A.B.); (K.G.); (F.A.); (J.K.)
| | - Maria Kulecka
- Department of Gastroenterology, Hepatology and Clinical Oncology, Centre of Postgraduate Medical Education, 02-781 Warsaw, Poland; (M.K.); (N.Z.-L.); (J.O.)
- Department of Genetics, Maria Skłodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.K.); (M.P.); (A.B.); (K.G.); (F.A.); (J.K.)
| | - Aneta Bałabas
- Department of Genetics, Maria Skłodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.K.); (M.P.); (A.B.); (K.G.); (F.A.); (J.K.)
| | - Natalia Zeber-Lubecka
- Department of Gastroenterology, Hepatology and Clinical Oncology, Centre of Postgraduate Medical Education, 02-781 Warsaw, Poland; (M.K.); (N.Z.-L.); (J.O.)
- Department of Genetics, Maria Skłodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.K.); (M.P.); (A.B.); (K.G.); (F.A.); (J.K.)
| | - Krzysztof Goryca
- Department of Genetics, Maria Skłodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.K.); (M.P.); (A.B.); (K.G.); (F.A.); (J.K.)
| | - Filip Ambrożkiewicz
- Department of Genetics, Maria Skłodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.K.); (M.P.); (A.B.); (K.G.); (F.A.); (J.K.)
| | - Jakub Karczmarski
- Department of Genetics, Maria Skłodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.K.); (M.P.); (A.B.); (K.G.); (F.A.); (J.K.)
| | - Tomasz Olesiński
- Department of Gastroenterological Oncology, Maria Skłodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (T.O.); (Ł.Z.)
| | - Łukasz Zyskowski
- Department of Gastroenterological Oncology, Maria Skłodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (T.O.); (Ł.Z.)
| | - Jerzy Ostrowski
- Department of Gastroenterology, Hepatology and Clinical Oncology, Centre of Postgraduate Medical Education, 02-781 Warsaw, Poland; (M.K.); (N.Z.-L.); (J.O.)
- Department of Genetics, Maria Skłodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.K.); (M.P.); (A.B.); (K.G.); (F.A.); (J.K.)
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Aghabozorgi AS, Sharif S, Jafarzadeh-Esfehani R, Vakili S, Abbaszadegan MR. Role of miRNA gene variants in the susceptibility and pharmacogenetics of colorectal cancer. Pharmacogenomics 2021; 22:303-318. [PMID: 33733820 DOI: 10.2217/pgs-2020-0159] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Colorectal cancer (CRC) is one of the most significant challenges in the field of cancer pathology. miRNAs are among the genetic factors associated with the disease. Although many studies have reviewed the expression patterns of various miRNAs in CRC, few studies have focused on different variants of miRNA. In the present review, miRNA variants have been categorized into three subgroups, including miRNA variants that predict susceptibility to CRC, miRNA variants that predict the clinical parameters of CRC and finally, miRNA variants that predict the pharmacological aspects of CRC. Moreover, a comprehensive review of potentially functional miRNA-associated SNPs as well as their importance as candidate cancer biomarkers are discussed.
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Affiliation(s)
| | - Samaneh Sharif
- Medical Genetics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Saba Vakili
- Medical Genetics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
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Qi X, Liu Z, Zhang Q, Yang M, Wan Y, Huang J, Xu L. Systematic analysis of the function and prognostic value of RNA binding proteins in Colon Adenocarcinoma. J Cancer 2021; 12:2537-2549. [PMID: 33854615 PMCID: PMC8040719 DOI: 10.7150/jca.50407] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 02/17/2021] [Indexed: 12/22/2022] Open
Abstract
Background: Abnormal expression of RNA-binding proteins (RBPs) is closely related to tumorigenesis, progression, and prognosis. This study performed systematic bioinformatic analysis of RBPs abnormally expressed in colon adenocarcinoma (COAD) using the Cancer Genome Atlas (TCGA) database to screen prognostic markers and potential therapeutic targets. Methods: First, the gene expression data from COAD samples were used to screen out differentially expressed RBPs for functional enrichment analysis and to visualize interaction relationships. Second, RBPs that were significantly related to prognosis were screened through univariate and multivariate Cox regression analysis to construct a prognostic model. The prediction performance of the prognostic model was evaluated by survival analysis and receiver operating characteristic (ROC) curve analysis. It addition, it was verified in the test cohort. The Human Protein Atlas (HPA) online database was used to verify the expression levels of RBPs in the prognostic model. Results: The study identified 181 differentially expressed RBPs and analyzed their interaction and functional enrichment, which were mainly related to non-coding RNA processing, ribosome biogenesis, RNA metabolic processes, RNA phosphodiester bond hydrolysis, and alternative mRNA splicing. Five RBPs related to prognosis were used to construct a prognostic model, and its predictive ability was verified by the test cohort. ROC curve analysis showed that the prognostic model had good sensitivity and specificity. Independent prognostic analysis showed that risk scores could be used as independent prognostic factors for COAD. Conclusion: This study constructed a reliable prognostic model by analyzing COAD differentially expressed RBPs, facilitating the screening of COAD prognostic markers and therapeutic targets.
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Affiliation(s)
- Xuewei Qi
- Third Affiliated Hospital, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Zeyu Liu
- Third Affiliated Hospital, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Qiaoli Zhang
- Third Affiliated Hospital, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Ming Yang
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Yuxiang Wan
- Third Affiliated Hospital, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Jinchang Huang
- Third Affiliated Hospital, Beijing University of Chinese Medicine, Beijing 100029, China.,Institute of Acupuncture and Moxibustion in Cancer Care, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Lin Xu
- Third Affiliated Hospital, Beijing University of Chinese Medicine, Beijing 100029, China
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Abbaszadegan MR, Taghehchian N, Aarabi A, Moghbeli M. MAEL Cancer-Testis Antigen as a Diagnostic Marker in Primary Stages of Gastric Cancer with Helicobacter pylori Infection. J Gastrointest Cancer 2020; 51:17-22. [PMID: 30488287 DOI: 10.1007/s12029-018-0183-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
PURPOSE Gastric cancer (GC) is the third leading cause of cancer related deaths in the world. Cancer testis antigens (CTAs) are involved in tumor progression of various cancers. These markers have not any expression or minimally expression in normal tissues, highlighting them as efficient methods for molecular targeted therapy. In the present study, we assessed the role of MAEL as a CTA in biology of GC and risk of Helicobacter Pylori (H pylori) infection. METHODS Levels of MAEL mRNA expression in 80 GC tumor tissues were compared to their corresponding normal margins using the real-time polymerase chain reaction. RESULTS There was a significant correlation between MAEL expression and tumor stage (p = 0.050). There were also significant correlations between MAEL expression and tumor grade (p = 0.015) and depth of invasion (p = 0.030) among the H pylori negative cases. CONCLUSIONS MAEL is probably associated with aggressiveness of primary-stage tumors and can be introduced as an efficient marker for the early detection and also H pylori infected tumors in GC patients.
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Affiliation(s)
- Mohammad Reza Abbaszadegan
- Immunology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.,Medical Genetics Research Center, Faculty of Medical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Negin Taghehchian
- Immunology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Azadeh Aarabi
- Medical Genetics Research Center, Faculty of Medical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Meysam Moghbeli
- Department of Modern Sciences and Technologies, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
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Molecular and Functional Characterization of the Somatic PIWIL1/piRNA Pathway in Colorectal Cancer Cells. Cells 2019; 8:cells8111390. [PMID: 31694219 PMCID: PMC6912267 DOI: 10.3390/cells8111390] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 11/01/2019] [Accepted: 11/03/2019] [Indexed: 02/07/2023] Open
Abstract
PIWI-like (PIWIL) proteins and small non-coding piRNAs, involved in genome regulation in germline cells, are found aberrantly expressed in human tumors. Gene expression data from The Cancer Genome Atlas (TCGA), the Genotype-Tissue Expression (GTEx) project, and the European Genome-Phenome Archive (EGA) indicate that the PIWIL1 gene is ectopically activated in a significant fraction of colorectal cancers (CRCs), where this is accompanied by promoter demethylation, together with germline factors required for piRNA production. Starting from this observation, the PIWIL/piRNA pathway was studied in detail in COLO 205 CRC cells, which express significant levels of this protein, to investigate role and significance of ectopic PIWIL1 expression in human tumors. RNA sequencing and cell and computational biology led to the demonstration that PIWIL1 localizes in a nuage-like structure located in the perinuclear region of the cell and that a significant fraction of the piRNAs expressed in these cells are methylated, and, therefore, present in an active form. This was further supported by RNA immunoprecipitation, which revealed how several piRNAs can be found loaded into PIWIL1 to form complexes also comprising their target mRNAs. The mature transcripts associated with the PIWIL-piRNA complex encode key regulatory proteins involved in the molecular mechanisms sustaining colorectal carcinogenesis, suggesting that the PIWI/piRNA pathway may actively contribute to the establishment and/or maintenance of clinico-pathological features of CRCs.
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11
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Abbaszadegan MR, Moghbeli M. Genetic and molecular origins of colorectal Cancer among the Iranians: an update. Diagn Pathol 2018; 13:97. [PMID: 30579343 PMCID: PMC6303916 DOI: 10.1186/s13000-018-0774-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Accepted: 12/05/2018] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Colorectal cancer (CRC) is one the leading causes of cancer related deaths among Iranians. Despite the various progresses in new therapeutic methods, it has still a low rate of survival. This high ratio of mortality is mainly related to the late diagnosis, in which the patients refer for treatment in advanced stages of tumor. MAIN BODY: colorectal cancer progression is largely associated with molecular and genetic bases. Although Iran has a high ratio of CRC mortality, there is not an efficient genetic panel for detection and prognosis. Therefore, it is critical to introduce new diagnostic markers with ability to detect in early stages. CONCLUSION Present review summarizes all of the genetic and epigenetic factors which are reported in CRC until now among the Iranian patients to pave the way of incorporation of new ethnic specific markers into the clinical practice and development of new targeted therapeutic methods.
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Affiliation(s)
| | - Meysam Moghbeli
- Department of Modern Sciences and Technologies, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
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12
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Pei G, Li B, Ma A. Suppression of Hiwi inhibits the growth and epithelial-mesenchymal transition of cervical cancer cells. Oncol Lett 2018; 16:3874-3880. [PMID: 30128001 DOI: 10.3892/ol.2018.9056] [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: 10/24/2016] [Accepted: 09/28/2017] [Indexed: 12/14/2022] Open
Abstract
Cervical cancer is a common gynecological malignancy. Hiwi exhibits a high level of expression in cervical cancer cells. However, the effects of Hiwi expression in cervical cancer cells remain unresolved. In the present study, the effects of Hiwi downregulation on the growth and epithelial-mesenchymal transition of cervical cancer cells were investigated. The results of the present study revealed that the suppression of Hiwi was able to inhibit the proliferation of cervical cancer cells and arrest cell cycle at G1 phase. The downregulation of Hiwi was also revealed to inhibit the epithelial-mesenchymal transition process of cervical cancer cells by regulating the expression of E-cadherin, N-cadherin, vimentin, and snail. The present study demonstrated that the suppression of Hiwi was able to inhibit the growth and epithelial-mesenchymal transition of cervical cancer cells. Therefore, the results suggest that Hiwi may function as an oncogene in cervical cancer cells and may become a potential target for cervical cancer therapy.
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Affiliation(s)
- Guangjun Pei
- Department of Radiotherapy, The First Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Baojian Li
- Department of Oncology, Zaozhuang Mining Group Center Hospital, Zaozhuang, Shandong 277800, P.R. China
| | - Anjun Ma
- Department of Gynecology, The Second People's Hospital of Liaocheng, Linqing, Shandong 252600, P.R. China
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Li H, Shi CX, Liu H, Zhang HH, Sang HM, Soyfoo MD, Cao JL, Xu SF, Jiang JX. Hiwi overexpression does not affect proliferation, migration or apoptosis of liver cancer cells in vitro or in vivo. Oncol Lett 2018; 15:9711-9718. [PMID: 29928347 PMCID: PMC6004705 DOI: 10.3892/ol.2018.8585] [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: 08/07/2016] [Accepted: 03/16/2018] [Indexed: 11/27/2022] Open
Abstract
Piwi like RNA-mediated gene silencing 1 (Hiwi) is a human homolog of the Piwi gene family that has been reported to be upregulated in hepatocellular carcinoma (HCC). The present study aimed to investigate the role of Hiwi in the initiation and development of HCC in vitro and in vivo. Adenovirus-mediated Hiwi overexpression was established in primary murine hepatocytes and SMMC7721 HCC cells. Cell viability and proliferation were assessed using MTT and EdU assays, respectively. Cell migration was measured using a scratch migration assay. The cell cycle was assessed using flow cytometry, and the expression of genes associated with the epithelial mesenchymal transition (EMT) was assessed using reverse transcription-quantitative polymerase chain reaction. SMMC7721 cells that stably express Hiwi were also generated and injected subcutaneously into the nude mice, and tumor growth was examined. Recombinant adenovirus encoding green fluorescent protein or Hiwi was delivered by injection into the tail vein, and its effect on murine hepatocyte gene expression was studied. The present study revealed that the overexpression of Hiwi did not affect the proliferation or migration of liver cancer cells and failed to suppress perifosine- or doxorubicin-induced apoptosis in vitro. The tumors of mice that were injected with Hiwi-expressing SMMC7721 cells were not significantly larger compared with mice that were injected with control SMMC7721 cells. Hiwi overexpression did not noticeably alter the expression of genes involved in EMT, either in vitro or in vivo. The results of the present study indicate that although expression of Hiwi is associated with HCC development and progression in the clinic, it does not act as an oncogene in liver cancer cells.
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Affiliation(s)
- Hao Li
- Department of Pathophysiology, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
| | - Chen-Xi Shi
- Department of Pathophysiology, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
| | - Hui Liu
- Department of Pathophysiology, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
| | - Hai-Han Zhang
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Huai-Ming Sang
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Muhammad-Djaleel Soyfoo
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Jiu-Liang Cao
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Shun-Fu Xu
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Jian-Xia Jiang
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
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Somanath P, Bush KM, Knoepfler PS. ERBB3-Binding Protein 1 (EBP1) Is a Novel Developmental Pluripotency-Associated-4 (DPPA4) Cofactor in Human Pluripotent Cells. Stem Cells 2018; 36:671-682. [PMID: 29327467 DOI: 10.1002/stem.2776] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 12/04/2017] [Accepted: 12/09/2017] [Indexed: 12/31/2022]
Abstract
Developmental Pluripotency-Associated-4 (DPPA4) is one of the few core pluripotency genes lacking clearly defined molecular and cellular functions. Here, we used a proteomics screening approach of human embryonic stem cell (hESC) nuclear extract to determine DPPA4 molecular functions through identification of novel cofactors. Unexpectedly, the signaling molecule ERBB3-binding protein 1 (EBP1) was the strongest candidate binding partner for DPPA4 in hESC. EBP1 is a growth factor signaling mediator present in two isoforms, p48 and p42. The two isoforms generally have opposing functions, however their roles in pluripotent cells have not been established. We found that DPPA4 preferentially binds p48 in pluripotent and NTERA-2 cells, but this interaction is largely absent in non-pluripotent cells and is reduced with differentiation. The DPPA4-EBP1 interaction is mediated at least in part in DPPA4 by the highly conserved SAF-A/B, Acinus and PIAS (SAP) domain. Functionally, we found that DPPA4 transcriptional repressive function in reporter assays is significantly increased by specific p48 knockdown, an effect that was abolished with an interaction-deficient DPPA4 ΔSAP mutant. Thus, DPPA4 and EBP1 may cooperate in transcriptional functions through their physical association in a pluripotent cell specific context. Our study identifies EBP1 as a novel pluripotency cofactor and provides insight into potential mechanisms used by DPPA4 in regulating pluripotency through its association with EBP1. Stem Cells 2018;36:671-682.
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Affiliation(s)
- Priyanka Somanath
- Department of Cell Biology and Human Anatomy, University of California, Davis, Davis, California, USA.,Institute of Pediatric Regenerative Medicine, Shriners Hospital for Children Northern California, Sacramento, California, USA
| | - Kelly M Bush
- Department of Cell Biology and Human Anatomy, University of California, Davis, Davis, California, USA.,Institute of Pediatric Regenerative Medicine, Shriners Hospital for Children Northern California, Sacramento, California, USA
| | - Paul S Knoepfler
- Department of Cell Biology and Human Anatomy, University of California, Davis, Davis, California, USA.,Institute of Pediatric Regenerative Medicine, Shriners Hospital for Children Northern California, Sacramento, California, USA
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Ardalan Khales S, Ebrahimi E, Jahanzad E, Ardalan Khales S, Forghanifard MM. MAML1 and TWIST1 co-overexpression promote invasion of head and neck squamous cell carcinoma. Asia Pac J Clin Oncol 2018; 14:e434-e441. [PMID: 29333702 DOI: 10.1111/ajco.12843] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 12/11/2017] [Indexed: 12/13/2022]
Abstract
AIMS Head and neck squamous cell carcinoma (HNSCC) is the seventh most common cancer worldwide with considerable morbidity and mortality. Invasion and metastasis of HNSCC is a complex process involving multiple molecules and signaling pathways. Twist Family BHLH Transcription Factor 1 (TWIST1) and Mastermind-like 1 (MAML1) are essential in induction of epithelial-mesenchymal transition through direct regulation of implicated molecules in cellular adhesion, migration and invasion. Our aim in this study was to assess the clinical significance of MAML1 and TWIST1 expression in HNSCC, and elucidate the probable correlation between these genes to exhibit their possible associations with progression and metastasis of the disease. METHODS The gene expression profile of MAML1 and TWIST1 was assessed in fresh tumoral compared to distant tumor-free tissues of 55 HNSCC patients using quantitative real-time Polymerase chain reaction (PCR). RESULTS Significant overexpression of MAML1 and TWIST1 mRNA was observed in 49.1% and 38.2% (P ˂ 0.05) of tumor specimens, respectively. Overexpression of MAML1 was associated with vascular invasion (P = 0.048). Concomitant overexpression of MAML1 and TWIST1 was significantly correlated to each other (P = 0.004). Co-overexpression of the genes was significantly correlated to the various clinicopathological indices of poor prognosis including depth of tumor invasion (P < 0.01), lymphatic invasion and grade of tumor cell differentiation (P < 0.05). CONCLUSIONS Significant correlation between MAML1 and TWIST1 in HNSCC was revealed. This study was the first report elucidating MAML1 clinical relevance in HNSCC. These new findings suggest an oncogenic role for concomitant expression of MAML1 and TWIST1 genes in HNSCC invasion and metastasis.
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Affiliation(s)
- Sima Ardalan Khales
- Department of Biology, Tehran North Branch, Islamic Azad University, Tehran, Iran
| | - Ehsan Ebrahimi
- Department of Biology, Damghan Branch, Islamic Azad University, Damghan, Iran
| | - Eisa Jahanzad
- Department of Clinical Pathology, Tehran University of Medical Sciences, Tehran, Iran
| | - Sahar Ardalan Khales
- Department of Modern Sciences and Technologies, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
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Shen S, Yu H, Liu X, Liu Y, Zheng J, Wang P, Gong W, Chen J, Zhao L, Xue Y. PIWIL1/piRNA-DQ593109 Regulates the Permeability of the Blood-Tumor Barrier via the MEG3/miR-330-5p/RUNX3 Axis. MOLECULAR THERAPY-NUCLEIC ACIDS 2017; 10:412-425. [PMID: 29499952 PMCID: PMC5862138 DOI: 10.1016/j.omtn.2017.12.020] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Revised: 12/27/2017] [Accepted: 12/27/2017] [Indexed: 02/06/2023]
Abstract
The blood-tumor barrier (BTB) restricts the efficient delivery of anti-glioma drugs to cranial glioma tissues. Increased BTB permeability may allow greater delivery of the therapeutic agents. Increasing evidence has revealed that PIWI proteins and PIWI-interacting RNAs (piRNAs) play an important role in tumor progression. However, whether PIWI proteins and piRNAs regulate BTB permeability remains unclear. In the present study, we demonstrated that the PIWIL1/piRNA-DQ593109 (piR-DQ593109) complex was the predominant regulator of BTB permeability. Briefly, PIWIL1 was upregulated in glioma endothelial cells (GECs). Furthermore, piR-DQ593109 was also overexpressed in GECs, as revealed via a piRNA microarray. Downregulation of PIWIL1 or piR-DQ593109 increased the permeability of the BTB. Moreover, PIWIL1 and piR-DQ593109, which formed a piRNA-induced silencing complex, degraded the long non-coding RNA maternally expressed 3 (MEG3) in a sequenced-dependent manner. Furthermore, restoring MEG3 released post-transcriptional inhibition of Runt related transcription factor 3 (RUNX3) by sponging miR-330-5p. In addition, RUNX3 bounded to the promoter regions and reduced the promoter activities of ZO-1, occludin, and claudin-5, which significantly impaired the expression levels of ZO-1, occludin, and claudin-5. In conclusion, downregulating PIWIL1 and piR-DQ593109 increased BTB permeability through the MEG3/miR-330-5p/RUNX3 axis. These data may provide insight into glioma treatment.
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Affiliation(s)
- Shuyuan Shen
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang 110122, People's Republic of China; Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang 110122, People's Republic of China; Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang 110122, People's Republic of China
| | - Hai Yu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang 110004, People's Republic of China; Liaoning Research Center for Clinical Medicine in Nervous System Disease, Shenyang 110004, People's Republic of China; Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang 110004, People's Republic of China
| | - Xiaobai Liu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang 110004, People's Republic of China; Liaoning Research Center for Clinical Medicine in Nervous System Disease, Shenyang 110004, People's Republic of China; Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang 110004, People's Republic of China
| | - Yunhui Liu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang 110004, People's Republic of China; Liaoning Research Center for Clinical Medicine in Nervous System Disease, Shenyang 110004, People's Republic of China; Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang 110004, People's Republic of China
| | - Jian Zheng
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang 110004, People's Republic of China; Liaoning Research Center for Clinical Medicine in Nervous System Disease, Shenyang 110004, People's Republic of China; Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang 110004, People's Republic of China
| | - Ping Wang
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang 110122, People's Republic of China; Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang 110122, People's Republic of China; Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang 110122, People's Republic of China
| | - Wei Gong
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang 110122, People's Republic of China; Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang 110122, People's Republic of China; Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang 110122, People's Republic of China
| | - Jiajia Chen
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang 110122, People's Republic of China; Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang 110122, People's Republic of China; Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang 110122, People's Republic of China
| | - Lini Zhao
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang 110122, People's Republic of China; Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang 110122, People's Republic of China; Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang 110122, People's Republic of China
| | - Yixue Xue
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang 110122, People's Republic of China; Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang 110122, People's Republic of China; Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang 110122, People's Republic of China.
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Karami Madani G, Rad A, Molavi M, Ardalan Khales S, Abbaszadegan MR, Forghanifard MM. Predicting the Correlation of EZH2 and Cancer Stem Cell Markers in Esophageal Squamous Cell Carcinoma. J Gastrointest Cancer 2017; 49:437-441. [DOI: 10.1007/s12029-017-9985-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Abstract
The PIWI-like protein 1 (PIWIL1) plays a crucial role in stem cell proliferation, embryogenesis, growth, and development, as well as differentiation and maturation in multiple organisms. The relationships between PIWIL1 expression and clinicopathological features of colorectal cancer (CRC) patients were analyzed by us. Survival analysis was performed using the Kaplan-Meier method and Cox's proportional hazards model. The high expression rate of PIWIL1 in the cancer tissue was obviously higher than that in the corresponding adjacent tissue. The expression of PIWIL1 was closely related to the tumor differentiation degree, infiltration depth, lymphovascular invasion, lymph node metastasis, and TNM stage. The Kaplan-Meier survival model suggested that the survival time of CRC patients in the high PIWIL1 expression group was notably lower than that in the low PIWIL1 expression group. High PIWIL1 expression suggests a poor prognosis for CRC patients, and PIWIL1 can serve as an important molecular marker for predicting the prognosis of CRC patients.
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Rad A, Esmaeili Dizghandi S, Abbaszadegan MR, Taghechian N, Najafi M, Forghanifard MM. SOX1 is correlated to stemness state regulator SALL4 through progression and invasiveness of esophageal squamous cell carcinoma. Gene 2016; 594:171-175. [DOI: 10.1016/j.gene.2016.08.045] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 08/22/2016] [Accepted: 08/26/2016] [Indexed: 02/07/2023]
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Hiwi Promotes the Proliferation of Colorectal Cancer Cells via Upregulating Global DNA Methylation. DISEASE MARKERS 2015; 2015:383056. [PMID: 26355242 PMCID: PMC4556077 DOI: 10.1155/2015/383056] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 06/16/2015] [Accepted: 06/17/2015] [Indexed: 01/18/2023]
Abstract
Hiwi is well known for its role in stem cell renewal, maintaining the resting stage, and downregulating cell cycle of stem cells via RNA silencing. And Hiwi overexpression has been recognized in several types of cancers. In the present study, we examined the Hiwi expression in colorectal cancer (CRC) specimens in both mRNA and protein levels via real-time quantitative PCR, western blot assay, and immunohistochemical staining. Then we explored the role of Hiwi in the cancer cell proliferation and in the DNA methylation in human CRC Caro-2 and HT-29 cell lines. Results demonstrated that both mRNA and protein levels of Hiwi were significantly higher in 38 CRC tissues than in 38 peritumor tissues. Moreover, the Hiwi overexpression with an adenovirus vector significantly promoted the proliferation of Caro-2 and HT-29 cells, associated with significant increase in the global DNA methylation levels. And the chemical inhibition of DNA methylation significantly restrained such proliferation promotion. In summary, we confirmed that Hiwi was overexpressed in CRC tissues and that the forced Hiwi overexpression promoted the proliferation and global DNA methylation of CRC cell lines. Our results imply for the first time that Hiwi promotes the proliferation of CRC cells via promoting global DNA methylation.
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Diagnostic clinical relevance of developmental pluripotency-associated 2 (DPPA2) in colorectal cancer. Int J Surg 2015; 13:193-197. [DOI: 10.1016/j.ijsu.2014.11.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Accepted: 11/22/2014] [Indexed: 12/17/2022]
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