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Yang S, Min X, Hu L, Zheng M, Lu S, Zhao M, Jia S. RFX1 regulates foam cell formation and atherosclerosis by mediating CD36 expression. Int Immunopharmacol 2024; 130:111751. [PMID: 38402833 DOI: 10.1016/j.intimp.2024.111751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 02/06/2024] [Accepted: 02/21/2024] [Indexed: 02/27/2024]
Abstract
BACKGROUND AND AIMS Atherosclerosis (AS) is a continuously low-grade inflammatory disease, and monocyte-derived macrophages play a vital role in AS pathogenesis. Regulatory factor X1 (RFX1) has been reported to participate in differentiation of various cells. Our previous report showed that RFX1 expression in CD14+ monocytes from AS patients was decreased and closely related to AS development. Macrophages mostly derive from monocytes and play an important role in AS plaque formation and stability. However, the functions of RFX1 in the formation of macrophage-derived foam cells and consequent AS development are unclear. METHODS We explored the effects of RFX1 on oxidation low lipoprotein (ox-LDL)-stimulated foam cell formation and CD36 expression by increasing or silencing Rfx1 expression in mouse peritoneal macrophages (PMAs). The ApoE-/-Rfx1f/f or ApoE-/-Rfx1f/f Lyz2-Cre mice fed a high-fat diet for 24 weeks were used to further examine the effect of RFX1 on AS pathogenesis. We then performed dual luciferase reporter assays to study the regulation of RFX1 for CD36 transcription. RESULTS Our results demonstrate that RFX1 expression was significantly reduced in ox-LDL induced foam cells and negatively correlated with lipid uptake in macrophages. Besides, Rfx1 deficiency in myeloid cells aggravated atherosclerotic lesions in ApoE-/- mice. Mechanistically, RFX1 inhibited CD36 expression by directly regulating CD36 transcription in macrophages. CONCLUSIONS The reduction of RFX1 expression in macrophages is a vital determinant for foam cell formation and the initiation of AS, proving a potential novel approach for the treatment of AS disease.
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Affiliation(s)
- Shuang Yang
- Department of Dermatology, Second Xiangya Hospital, Central South University, Hunan Key Laboratory of Medical Epigenomics, Changsha 410011, China
| | - Xiaoli Min
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing 210042, China; Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Chinese Academy of Medical Sciences, Nanjing, China
| | - Longyuan Hu
- Department of Dermatology, Second Xiangya Hospital, Central South University, Hunan Key Laboratory of Medical Epigenomics, Changsha 410011, China
| | - Meiling Zheng
- Department of Dermatology, Second Xiangya Hospital, Central South University, Hunan Key Laboratory of Medical Epigenomics, Changsha 410011, China
| | - Shuang Lu
- Department of Dermatology, Second Xiangya Hospital, Central South University, Hunan Key Laboratory of Medical Epigenomics, Changsha 410011, China
| | - Ming Zhao
- Department of Dermatology, Second Xiangya Hospital, Central South University, Hunan Key Laboratory of Medical Epigenomics, Changsha 410011, China; Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing 210042, China; Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Chinese Academy of Medical Sciences, Nanjing, China
| | - Sujie Jia
- Department of Pharmacy, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing 210042, China.
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Issac J, Raveendran PS, Kunnummal M, Angelin M, Ravindran S, Basu B, Das AV. RXR agonist, Bexarotene, effectively reduces drug resistance via regulation of RFX1 in embryonic carcinoma cells. Biochim Biophys Acta Mol Cell Res 2023; 1870:119510. [PMID: 37301270 DOI: 10.1016/j.bbamcr.2023.119510] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 05/16/2023] [Accepted: 06/02/2023] [Indexed: 06/12/2023]
Abstract
Aberrant expression of multidrug resistance (MDR) proteins is one of the features of cancer stem cells (CSCs) that make them escape chemotherapy. A well-orchestrated regulation of multiple MDRs by different transcription factors in cancer cells confers this drug resistance. An in silico analysis of the major MDR genes revealed a possible regulation by RFX1 and Nrf2. Previous reports also noted that Nrf2 is a positive regulator of MDR genes in NT2 cells. But we, for the first time, report that Regulatory factor X1 (RFX1), a pleiotropic transcription factor, negatively regulates the major MDR genes, Abcg2, Abcb1, Abcc1, and Abcc2, in NT2 cells. The levels of RFX1 in undifferentiated NT2 cells were found to be very low, which significantly increased upon RA-induced differentiation. Ectopic expression of RFX1 reduced the levels of transcripts corresponding to MDRs and stemness-associated genes. Interestingly, Bexarotene, an RXR agonist that acts as an inhibitor of Nrf2-ARE signaling, could increase the transcription of RFX1. Further analysis revealed that the RFX1 promoter has binding sites for RXRα, and upon Bexarotene exposure RXRα could bind and activate the RFX1 promoter. Bexarotene, alone or in combination with Cisplatin, could inhibit many cancer/CSC-associated properties in NT2 cells. Also, it significantly reduced the expression of drug resistance proteins and made the cells sensitive towards Cisplatin. Our study proves that RFX1 could be a potent molecule to target MDRs, and Bexarotene can induce RXRα-mediated RFX1 expression, therefore, would be a better chemo-assisting drug during therapy.
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Affiliation(s)
- Joby Issac
- Cancer Research Program-12, Rajiv Gandhi Centre for Biotechnology (DBT-RGCB), Thycaud. P.O. Thiruvananthapuram-14, Kerala, India
| | - Pooja S Raveendran
- Cancer Research Program-12, Rajiv Gandhi Centre for Biotechnology (DBT-RGCB), Thycaud. P.O. Thiruvananthapuram-14, Kerala, India; Manipal Academy of Higher Education, Tiger Circle Road, Madhav Nagar, Manipal, Karnataka 576104, India
| | - Midhunaraj Kunnummal
- Cancer Research Program-12, Rajiv Gandhi Centre for Biotechnology (DBT-RGCB), Thycaud. P.O. Thiruvananthapuram-14, Kerala, India; Manipal Academy of Higher Education, Tiger Circle Road, Madhav Nagar, Manipal, Karnataka 576104, India
| | - Mary Angelin
- Cancer Research Program-12, Rajiv Gandhi Centre for Biotechnology (DBT-RGCB), Thycaud. P.O. Thiruvananthapuram-14, Kerala, India
| | - Swathy Ravindran
- Cancer Research Program-12, Rajiv Gandhi Centre for Biotechnology (DBT-RGCB), Thycaud. P.O. Thiruvananthapuram-14, Kerala, India
| | - Budhaditya Basu
- Neuro Stem Cell Biology Laboratory, Neurobiology Division, Rajiv Gandhi Centre for Biotechnology (DBT-RGCB), Thiruvananthapuram, Kerala 695 014, India; Regional Centre for Biotechnology (DBT-RCB), Faridabad, Haryana 121001, India
| | - Ani V Das
- Cancer Research Program-12, Rajiv Gandhi Centre for Biotechnology (DBT-RGCB), Thycaud. P.O. Thiruvananthapuram-14, Kerala, India; Manipal Academy of Higher Education, Tiger Circle Road, Madhav Nagar, Manipal, Karnataka 576104, India.
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Ma T, Zhou X, Wei H, Yan S, Hui Y, Liu Y, Guo H, Li Q, Li J, Chang Z, Mu XX. Long Non-coding RNA SNHG17 Upregulates RFX1 by Sponging miR-3180-3p and Promotes Cellular Function in Hepatocellular Carcinoma. Front Genet 2021; 11:607636. [PMID: 33519911 PMCID: PMC7844393 DOI: 10.3389/fgene.2020.607636] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 11/30/2020] [Indexed: 02/06/2023] Open
Abstract
Background Hepatocellular carcinoma (HCC) is one of the most common types of cancer that is associated with poor quality of life in patients and a global health burden. The mechanisms involved in the development and progression of HCC remain poorly understood. Methods Hepatocellular carcinoma human samples and cell lines were subjected to qRT-PCR for expression assessment. CCK-8 assay, Transwell migration and invasion assay, were applied for cell function detection. Animal experiment was used to measure the function of SNHG17 on cell growth in vivo. Western blot was conducted to evaluate the level of EMT in cells. RIP, RNA pull-down and luciferase reporter assays were performed to assess the correlation between SNHG17, miR-3180-3p and RFX1. Results Our study demonstrated that SNHG17 was upregulated in HCC human samples and involved cell proliferation, migration, invasion progress. SNHG17 promoted HCC cell growth and metastasis in vivo. Furthermore, we investigated the downstream factor of SNHG17, SNHG17 acted as a molecular sponge for miR-3180-3p, and SNHG17 regulated RFX1 expression via miR-3180-3p. SNHG17 promotes tumor-like behavior in HCC cells via miR-3180-3p/RFX1. Conclusion We determined RFX1 as the target of miR-3810-3p; SNHG17 enhanced the progression of HCC via the miR-3180-3p/RFX1 axis. Taken together, our findings may provide insight into the molecular mechanism involved in the progression of HCC and develop SNHG17 as a novel therapeutic target against HCC.
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Affiliation(s)
- Tao Ma
- Department of Clinical Laboratory, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xujun Zhou
- Department of Gastroenterology, Wuhan Eighth Hospital, Wuhan, China
| | - Hailiang Wei
- Department of General Surgery, The Hospital Affiliated to Shaanxi University of Chinese Medicine, Xianyang, China
| | - Shuguang Yan
- College of Basic Medicine, The Shaanxi University of Chinese Medicine, Xianyang, China
| | - Yi Hui
- College of Basic Medicine, The Shaanxi University of Chinese Medicine, Xianyang, China
| | - Yonggang Liu
- Department of Liver Diseases, The Hospital Affiliated to Shaanxi University of Chinese Medicine, Xianyang, China
| | - Hui Guo
- Department of General Surgery, The Hospital Affiliated to Shaanxi University of Chinese Medicine, Xianyang, China
| | - Qian Li
- Medical Experiment Center, The Shaanxi University of Chinese Medicine, Xianyang, China
| | - Jingtao Li
- Department of Liver Diseases, The Hospital Affiliated to Shaanxi University of Chinese Medicine, Xianyang, China
| | - Zhanjie Chang
- Department of Liver Diseases, The Hospital Affiliated to Shaanxi University of Chinese Medicine, Xianyang, China
| | - Xiao-Xin Mu
- Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, Nanjing, China.,National Health Council (NHC) Key Laboratory of Living Donor Liver Transplantation, Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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Lubelsky Y, Shaul Y. Recruitment of the protein phosphatase-1 catalytic subunit to promoters by the dual-function transcription factor RFX1. Biochem Biophys Res Commun 2019; 509:1015-1020. [PMID: 30654936 DOI: 10.1016/j.bbrc.2019.01.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 01/03/2019] [Indexed: 01/06/2023]
Abstract
RFX proteins are a family of conserved DNA binding proteins involved in various, essential cellular and developmental processes. RFX1 is a ubiquitously expressed, dual-activity transcription factor capable of both activation and repression of target genes. The exact mechanism by which RFX1 regulates its target is not known yet. In this work, we show that the C-terminal repression domain of RFX1 interacts with the Serine/Threonine protein phosphatase PP1c, and that interaction with RFX1 can target PP1c to specific sites in the genome. Given that PP1c was shown to de-phosphorylate several transcription factors, as well as the regulatory C-terminal domain of RNA Polymerase II the recruitment of PP1c to promoters may be a mechanism by which RFX1 regulates the target genes.
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Affiliation(s)
- Yoav Lubelsky
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, 7610001, Israel.
| | - Yosef Shaul
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, 7610001, Israel.
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Liu L, Wang Q, Wang Q, Zhao X, Zhao P, Geng T, Gong D. Role of miR29c in goose fatty liver is mediated by its target genes that are involved in energy homeostasis and cell growth. BMC Vet Res 2018; 14:325. [PMID: 30400792 PMCID: PMC6219092 DOI: 10.1186/s12917-018-1653-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 10/17/2018] [Indexed: 11/21/2022] Open
Abstract
Background A short period of overfeeding can lead to severe hepatic steatosis in the goose, which is physiological, suggesting that geese, as a descendent of a migrating ancestor, may have evolutionally developed a unique mechanism that operates in contrast to the mechanism underlying pathological fatty liver in humans or other mammals. In this study, we report that suppression of miR29c and upregulation of its target genes in goose fatty liver vs. normal liver could be part of a unique mechanism that contributes to the regulation of energy homeostasis and cell growth. Results Our data showed that miR29c expression was comprehensively inhibited in energy homeostasis-related tissues (the liver, fat and muscle) of overfed vs. normally fed geese, which is different from miR29c induction that occurs in tissues of the diabetic rat. To address the function of miR29c, three predicted target genes (i.e., Insig1, Sgk1 and Col3a1) that participate in energy homeostasis or cell growth were validated by a dual-fluorescence reporter system and other in vitro assays. Importantly, expression of Insig1, Sgk1 and Col3a1 was upregulated in goose fatty liver. In line with these observations, treatment of goose hepatocytes with high glucose or palmitate suppressed the expression of miR29c but induced the expression of the target genes, suggesting that hyperglycemia and hyperlipidemia, at least partially, contribute to the suppression of miR29c and induction of the target genes in goose fatty liver. In addition, pharmacological assays indicated that RFX1 was a transcription factor involved in the expression of miR29c. Conclusions This study suggests that miR29c may play a role in the regulation of energy homeostasis and tissue growth via its target genes, contributing to the tolerance of the goose to severe hepatic steatosis. Electronic supplementary material The online version of this article (10.1186/s12917-018-1653-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Long Liu
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
| | - Qian Wang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
| | - Qianqian Wang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
| | - Xing Zhao
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
| | - Pan Zhao
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
| | - Tuoyu Geng
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China.
| | - Daoqing Gong
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China.
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Diotallevi A, De Santi M, Buffi G, Ceccarelli M, Vitale F, Galluzzi L, Magnani M. Leishmania Infection Induces MicroRNA hsa-miR-346 in Human Cell Line-Derived Macrophages. Front Microbiol 2018; 9:1019. [PMID: 29867904 PMCID: PMC5966562 DOI: 10.3389/fmicb.2018.01019] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 04/30/2018] [Indexed: 01/09/2023] Open
Abstract
Leishmaniasis is an anthropo-zoonotic disease caused by various Leishmania species. The clinical manifestations of the disease vary according to the species and host characteristics. Leishmania infection leads to subversion/modulation of the host’s innate immune response and cellular metabolic pathways. In the last years, it has been shown that many host cell gene expression and signaling pathways are targeted by Leishmania to subvert host defenses (e.g., oxidative damage, immune activation, antigen presentation, apoptosis) and allow parasite survival and replication. However, the molecular mechanisms triggered by the parasite are not fully elucidated. The role of miRNA has recently been evaluated in human or murine macrophages infected with Leishmania (Leishmania) major, L. (L.) donovani or L. (L.) amazonensis. However, no literature exists regarding miRNA dysregulation in host cells infected with L. (L.) infantum or L. (Viannia) species. Since we previously showed that L. (L.) infantum infection induced unfolded protein response (UPR) in macrophages, we focused on miR-346, which has been shown to be induced by the UPR-activated transcription factor sXBP1 and has a potential role in the modulation of the immune response. Macrophages differentiated from U937 and/or THP-1 human monocytic cells were infected with four L. (L.) infantum strain/clinical isolates and one L. (V.) sp. clinical isolate. A significant upregulation of miR-346 (p < 0.05) was observed in infections with all the Leishmania species tested. Moreover, RFX1 (a miR-346 predicted target gene) was found to be significantly downregulated (p < 0.05) after 48h infection, and miR-346 was found to have a role in this downregulation. The induction of miR-346 in macrophages infected with L. (L.) infantum and L. (V.) sp., reported here for the first time, could play a role in regulating macrophage functions since several MHC- or interferon-associated genes are among the targets of this miRNA. Hence, miR-346 could be considered an attractive anti-Leishmania drug target.
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Affiliation(s)
- Aurora Diotallevi
- Department of Biomolecular Sciences, Section of Biotechnology, University of Urbino, Fano, Italy
| | - Mauro De Santi
- Department of Biomolecular Sciences, Section of Hygiene, University of Urbino, Urbino, Italy
| | - Gloria Buffi
- Department of Biomolecular Sciences, Section of Biotechnology, University of Urbino, Fano, Italy
| | - Marcello Ceccarelli
- Department of Biomolecular Sciences, Section of Biotechnology, University of Urbino, Fano, Italy
| | - Fabrizio Vitale
- Istituto Zooprofilattico Sperimentale della Sicilia, Palermo, Italy
| | - Luca Galluzzi
- Department of Biomolecular Sciences, Section of Biotechnology, University of Urbino, Fano, Italy
| | - Mauro Magnani
- Department of Biomolecular Sciences, Section of Biotechnology, University of Urbino, Fano, Italy
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Liu Y, Jiang P, Wang G, Liu X, Luo S. Downregulation of RFX1 predicts poor prognosis of patients with small hepatocellular carcinoma. Eur J Surg Oncol 2018; 44:1087-1093. [PMID: 29764705 DOI: 10.1016/j.ejso.2018.04.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 04/08/2018] [Accepted: 04/18/2018] [Indexed: 02/08/2023] Open
Abstract
OBJECTIVE Regulatory factor X1 (RFX1) deletion has been reported to be correlated with poor prognosis of some types of cancer. The present study aimed to investigate the prognostic value of RFX1 in HCC, especially in small hepatocellular carcinoma. METHODS Immunohistochemical assay was used to investigate RFX1 expression in 221 HCC tissues and another validation cohort of 71 small HCC samples. We also performed in vitro experiments to investigate if RFX1 regulated invasive capacity of HCC cells and expression of epithelial-mesenchymal transition (EMT) markers. RESULTS We found that RFX1 expression was significantly lower in HCC tissues compared to the corresponding non-tumor tissues. Further survival analysis suggested that the downregulation of RFX1 correlated with poor prognosis and a high recurrence risk in HCC patients, particularly in small HCC patients. Furthermore, another validation cohort of small HCC samples confirmed that downregulation of RFX1 in HCC tissues predicted high recurrence risk and poor prognosis for early stage HCC patients. In vitro studies suggested that knocking down RFX1 facilitated HCC cell invasion, while overexpression of RFX1 reduced the invasion of HCC cells. Western blot assays also indicated that RFX1 regulated expression of some EMT markers. Knocking down RFX1 decreased E-cadherin and increased vimentin expression, while RFX1 overexpression enhanced E-cadherin and decreased vimentin expression. CONCLUSIONS Our study demonstrated that RFX1 downregulation is a new predictive marker of high recurrence risk and poor prognosis of HCC; It has potential to help guide treatment for postoperative HCC patients, especially for small HCC patients.
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Affiliation(s)
- Yingjun Liu
- Department of General Surgery, Affiliated Tumor Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, China
| | - Peng Jiang
- Affiliated Tumor Hospital of Guangzhou Medical University, Guangzhou, China
| | - Gangcheng Wang
- Department of General Surgery, Affiliated Tumor Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, China
| | - Xiaonyong Liu
- Department of General Surgery, Affiliated Tumor Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, China
| | - Suxia Luo
- Department of Internal Medicine, Affiliated Tumor Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, China.
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Shibata M, Kanda M, Shimizu D, Tanaka H, Umeda S, Hayashi M, Inaishi T, Miyajima N, Adachi Y, Takano Y, Nakanishi K, Takeuchi D, Noda S, Kodera Y, Kikumori T. Expression of regulatory factor X1 can predict the prognosis of breast cancer. Oncol Lett 2017; 13:4334-4340. [PMID: 28599435 DOI: 10.3892/ol.2017.6005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Accepted: 03/14/2017] [Indexed: 12/11/2022] Open
Abstract
Breast cancer (BC) is the most common malignancy among women. Identifying novel biomarkers to predict prognosis accurately is important in managing this disease. The regulatory factor X1 (RFX1) gene is a member of the regulatory factor X gene family. Its protein reportedly downregulates the proto-oncogene c-myc, but its role in BC has been unclear. In this study, expression and methylation status of RFX1 were determined in BC cell lines. We then evaluated RFX1 mRNA expression levels with regard to clinicopathological factors including postoperative prognosis in 167 patients with BC. Expression of RFX1 was heterogeneous among cell lines, and we found no DNA methylation at the RFX1 promoter region. Patients were categorized into groups with high or low RFX1 expression, based on ratio of RFX1 mRNA expression in BC and adjacent non-cancerous tissues. The high RFX1 group was significantly associated with low T factor (P=0.028), earlier disease stage (P=0.015), positive expression of estrogen receptor (P=0.005) and progesterone receptor (P=0.011), negative expression of human epidermal growth factor receptor 2 (P=0.001). The high RFX1 group experienced more favorable disease-free survival (P=0.007) and overall survival (P=0.013). In multivariate analysis, RFX1 expression was an independent prognostic factor for disease-free survival. Our findings indicate that RFX1 may serve as a prognostic marker for BC.
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Affiliation(s)
- Masahiro Shibata
- Department of Breast and Endocrine Surgery (Surgery II), Nagoya University Graduate School of Medicine, Showa-ku, Nagoya 466-8550, Japan
| | - Mitsuro Kanda
- Department of Gastroenterological Surgery (Surgery II), Nagoya University Graduate School of Medicine, Showa-ku, Nagoya 466-8550, Japan
| | - Dai Shimizu
- Department of Gastroenterological Surgery (Surgery II), Nagoya University Graduate School of Medicine, Showa-ku, Nagoya 466-8550, Japan
| | - Haruyoshi Tanaka
- Department of Gastroenterological Surgery (Surgery II), Nagoya University Graduate School of Medicine, Showa-ku, Nagoya 466-8550, Japan
| | - Shinichi Umeda
- Department of Gastroenterological Surgery (Surgery II), Nagoya University Graduate School of Medicine, Showa-ku, Nagoya 466-8550, Japan
| | - Masamichi Hayashi
- Department of Gastroenterological Surgery (Surgery II), Nagoya University Graduate School of Medicine, Showa-ku, Nagoya 466-8550, Japan
| | - Takahiro Inaishi
- Department of Breast and Endocrine Surgery (Surgery II), Nagoya University Graduate School of Medicine, Showa-ku, Nagoya 466-8550, Japan
| | - Noriyuki Miyajima
- Department of Breast and Endocrine Surgery (Surgery II), Nagoya University Graduate School of Medicine, Showa-ku, Nagoya 466-8550, Japan
| | - Yayoi Adachi
- Department of Breast and Endocrine Surgery (Surgery II), Nagoya University Graduate School of Medicine, Showa-ku, Nagoya 466-8550, Japan
| | - Yuko Takano
- Department of Breast and Endocrine Surgery (Surgery II), Nagoya University Graduate School of Medicine, Showa-ku, Nagoya 466-8550, Japan
| | - Kenichi Nakanishi
- Department of Breast and Endocrine Surgery (Surgery II), Nagoya University Graduate School of Medicine, Showa-ku, Nagoya 466-8550, Japan
| | - Dai Takeuchi
- Department of Breast and Endocrine Surgery (Surgery II), Nagoya University Graduate School of Medicine, Showa-ku, Nagoya 466-8550, Japan
| | - Sumiyo Noda
- Department of Breast and Endocrine Surgery (Surgery II), Nagoya University Graduate School of Medicine, Showa-ku, Nagoya 466-8550, Japan
| | - Yasuhiro Kodera
- Department of Gastroenterological Surgery (Surgery II), Nagoya University Graduate School of Medicine, Showa-ku, Nagoya 466-8550, Japan
| | - Toyone Kikumori
- Department of Breast and Endocrine Surgery (Surgery II), Nagoya University Graduate School of Medicine, Showa-ku, Nagoya 466-8550, Japan
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Wang B, Qi T, Chen SQ, Ye L, Huang ZS, Li H. RFX1 maintains testis cord integrity by regulating the expression of Itga6 in male mouse embryos. Mol Reprod Dev 2016; 83:606-14. [PMID: 27228460 DOI: 10.1002/mrd.22660] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 05/21/2016] [Indexed: 01/13/2023]
Abstract
Formation and maintenance of testis cords during embryogenesis are essential for establishing testicular structure and function in adults. At least five genes (Wt1, Dhh, Sox8/Sox9, and Dax1) appear to be required for the maintenance of testis cord integrity in mice. Here, we report that RFX1 is specifically expressed in fetal Sertoli cells. Mouse embryos conditionally deficient in Rfx1 (Rfx1(flox/flox) , Amh-Cre) possessed disrupted testis cords, as the basal lamina lining was fragmented or completely absent in some areas of the testes. Spermatogenesis was blocked, leading to complete infertility. Expression of integrin alpha-6 was significantly decreased in Rfx1-deficient testes compared to control testes; indeed, luciferase and chromatin immunoprecipitation assays indicated that RFX1 directly activates transcription of Itga6 (the gene coding for integrin alpha-6). Taken together, RFX1 transcriptionally targets Itga6 in Sertoli cells, thereby, helping maintain the integrity of the basal lamina during testis cord development. Mol. Reprod. Dev. 83: 606-614, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Bo Wang
- Department of Infertility and Sexual Medicine, Third Affiliated Hospital of Sun Yat-Sen University, Guang Zhou, China
| | - Tao Qi
- Department of Infertility and Sexual Medicine, Third Affiliated Hospital of Sun Yat-Sen University, Guang Zhou, China
| | - Shi-Qin Chen
- Assisted Reproductive Center, General Hospital of Guangzhou Military Command, Guangzhou, China
| | - Lei Ye
- Department of Infertility and Sexual Medicine, Third Affiliated Hospital of Sun Yat-Sen University, Guang Zhou, China
| | - Zhan-Sen Huang
- Department of Infertility and Sexual Medicine, Third Affiliated Hospital of Sun Yat-Sen University, Guang Zhou, China
| | - Hao Li
- Department of Infertility and Sexual Medicine, Third Affiliated Hospital of Sun Yat-Sen University, Guang Zhou, China
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