1
|
Lallemand F, Petitalot A, Vacher S, de Koning L, Taouis K, Lopez BS, Zinn-Justin S, Dalla-Venezia N, Chemlali W, Schnitzler A, Lidereau R, Bieche I, Caputo SM. Involvement of the FOXO6 transcriptional factor in breast carcinogenesis. Oncotarget 2017; 9:7464-7475. [PMID: 29484124 PMCID: PMC5800916 DOI: 10.18632/oncotarget.23779] [Citation(s) in RCA: 9] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 12/22/2017] [Indexed: 01/17/2023] Open
Abstract
In mammals, FOXO transcriptional factors form a family of four members (FOXO1, 3, 4, and 6) involved in the modulation proliferation, apoptosis, and carcinogenesis. The role of the FOXO family in breast cancer remains poorly elucidated. According to the cellular context and the stage of the disease, FOXOs can have opposite effects on carcinogenesis. To study the role of FOXOs in breast carcinogenesis in more detail, we examined their expression in normal tissues, breast cell lines, and a large series of breast tumours of human origin. We found a very low physiological level of FOXO6 expression in normal adult tissues and high levels of expression in foetal brain. FOXO gene expressions fluctuate specifically in breast cancer cells compared to normal cells, suggesting that these genes may have different roles in breast carcinogenesis. For the first time, we have shown that, among the various FOXO genes, only FOXO6 was frequently highly overexpressed in breast cell lines and tumours. We also found that inhibition of the endogenous expression of FOXO6 by a specific siRNA inhibited the growth of the human breast cell lines MDA-MB-468 and HCC-38. FACS and Western blot analysis showed that inhibition of endogenous expression of FOXO6 induced accumulation of cells in G0/G1 phase of the cell cycle, but not apoptosis. These results tend to demonstrate that the overexpression of the human FOXO6 gene that we highlighted in the breast tumors stimulates breast carcinogenesis by activating breast cancer cell proliferation.
Collapse
Affiliation(s)
- François Lallemand
- Service de génétique, unité de pharmacogénomique, Institut Curie, Paris, France
| | - Ambre Petitalot
- Service de génétique, unité de pharmacogénomique, Institut Curie, Paris, France.,Service de génétique, unité de génétique constitutionnelle, Institut Curie, Paris, France
| | - Sophie Vacher
- Service de génétique, unité de pharmacogénomique, Institut Curie, Paris, France
| | | | - Karim Taouis
- Service de génétique, unité de pharmacogénomique, Institut Curie, Paris, France
| | - Bernard S Lopez
- CNRS UMR 8200, Gustave Roussy Cancer Institute, Université Paris-Saclay, équipe labélisée par la Ligue contre le cancer, Villejuif, France
| | - Sophie Zinn-Justin
- Laboratoire de biologie structurale et radiobiologie, IBITEC-S (CEA) and I2BC (UMR 9198, CEA, CNRS, Univ. Paris South), Gif-sur-Yvette, France
| | - Nicole Dalla-Venezia
- Centre de Recherche en Cancérologie de Lyon (CRCL)/INSERM U1052-CNRS UMR5286, Lyon, France
| | - Walid Chemlali
- Service de génétique, unité de pharmacogénomique, Institut Curie, Paris, France
| | - Anne Schnitzler
- Service de génétique, unité de pharmacogénomique, Institut Curie, Paris, France
| | - Rosette Lidereau
- Service de génétique, unité de pharmacogénomique, Institut Curie, Paris, France
| | - Ivan Bieche
- Service de génétique, unité de pharmacogénomique, Institut Curie, Paris, France.,EA7331, Université Paris Descartes, Paris, France
| | - Sandrine M Caputo
- Service de génétique, unité de génétique constitutionnelle, Institut Curie, Paris, France
| |
Collapse
|
2
|
Wang L, Wang XC, Li X, Gu Y, Zhou J, Jiang S, Liu J, Wu C, Ding Z, Wan Y, Wang C. Expression of uc.189 and its clinicopathologic significance in gynecological cancers. Oncotarget 2017; 9:7453-7463. [PMID: 29484123 PMCID: PMC5800915 DOI: 10.18632/oncotarget.23761] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 04/04/2017] [Accepted: 12/23/2017] [Indexed: 01/01/2023] Open
Abstract
In recent decades, emerging evidence demonstrates that ultraconserved elements (UCEs) encoding noncoding RNAs serve as regulators of gene expression. Until now, the role of uc.189 in human cancers remains undefined and the clinical significance of uc.189 in gynecological cancers remains unknown. This study was to identify the prognostic value of uc.189 expression in gynecological cancers. Tissue microarrays were constructed with 243 samples including 116 cervical squamous cell carcinomas (CSCCs), 98 endometrial adenocarcinomas (EACs), 29 ovarian cystoadenocarcinomas(OCAs), and corresponding normal tissues. In CSCC, uc.189 expression was increased in 78.5% of cases (91/116), decreased in 4.3% (5/116), and unchanged in 17.2% (20/116). In EAC its expression was increased in 74.5% (73/98), decreased in 3.1% (3/98), and unchanged in 22.4% (22/98). Expression of uc.189 was increased in 23, and unchanged/decreased in 6, of 29 cases of ovarian cystoadenocarcinomas. Univariate and multivariate Cox regression analysis demonstrated that over-expression of uc.189 predicted poor prognosis in CSCC and EAC. Thus, these findings suggested uc.189 might be an evaluating prognosis marker of gynecological tumors.
Collapse
Affiliation(s)
- Lei Wang
- Department of Pathology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu 225009, China.,Department of Pharmacy, Medical College, Yangzhou University, Yangzhou, Jiangsu 225001, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu 225009, China
| | - Xing Cheng Wang
- Department of Pharmacy, Medical College, Yangzhou University, Yangzhou, Jiangsu 225001, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu 225009, China
| | - Xinyu Li
- Department of Basic Medical, Medical College, Yangzhou University, Yangzhou, Jiangsu 225001, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu 225009, China
| | - Yan Gu
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu 225001, China
| | - Jun Zhou
- Department of Pathology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Shuwan Jiang
- Department of Pathology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Jiajia Liu
- Department of Pathology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Chong Wu
- Department of Pathology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Zhiyan Ding
- Department of Pathology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Yafeng Wan
- Department of Pharmacy, Medical College, Yangzhou University, Yangzhou, Jiangsu 225001, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu 225009, China
| | - Chenghai Wang
- Department of Pathology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu 225009, China.,Department of Pharmacy, Medical College, Yangzhou University, Yangzhou, Jiangsu 225001, China.,Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu 225001, China.,Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou, Jiangsu 225001, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu 225009, China
| |
Collapse
|