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Dong X, Zhang Y, Sun Y, Nan Q, Li M, Ma L, Zhang L, Luo J, Qi Y, Miao Y. Promoter hypermethylation and comprehensive regulation of ncRNA lead to the down-regulation of ZNF880, providing a new insight for the therapeutics and research of colorectal cancer. BMC Med Genomics 2023; 16:148. [PMID: 37370088 PMCID: PMC10294494 DOI: 10.1186/s12920-023-01571-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
The human genome encodes more than 350 kinds of Krüppel-associated box (KRAB) domain-containing zinc-finger proteins (KZFPs), KRAB-type ZNF transcription factor family (KZNF) plays a vital role in gene regulatory networks. The KZNF family members include a large number of highly homologous genes, gene subtypes and pseudogenes, and their expression has a high degree of tissue specificity and precision. Due to the high complexity of its regulatory network, the KZNF gene family has not been researched in sufficient, and the role of its members in the occurrence of cancer is mostly unexplored. In this study, ZNF880 was significantly associated with overall survival (OS) and disease-free survival (DFS) in colorectal carcinoma (CRC) patients. Low ZNF880 expression resulted in shorter OS and DFS. Combined with Colon adenocarcinoma (COAD) and Rectum adenocarcinoma (READ) data collection in the TCGA database, we found that ZNF880 was significantly down-regulated in CRC. Further analysis of the sequence variation of ZNF880 in CRC showed that ZNF880 accumulated a large number of SNV in the C2H2 domain and KRAB domain, while promoter region of ZNF880 also showed high methylation in COAD and READ. Combined with the Cbioportal and TIMER databases, the expression of mutant ZNF880 was significantly lower in COAD compared to the wild type. Simultaneously, the lncRNA-miRNA-ZNF880 ceRNA regulatory network was constructed through co-expression and miRNAs target gene prediction, demonstrating the precision of the ZNF880 regulatory network. In addition, the decreased expression of ZNF880 caused the significant immune infiltration decreases of CD8 + cells in COAD. In contrast, the immune infiltration of CD4 + cells and macrophages in COAD is positively correlated with ZNF880. Finally, through protein-protein interaction (PPI) network analysis and transcription factor target gene prediction, we screened out the genes most likely to be related to the function of ZNF880. CENPK, IFNGR2, REC8 and ZBTB17 were identified as the most closely functioning genes with ZNF880, which may indicate that ZNF880 has important links with the formation of cell centromere, tumor immunity, cell cycle and other pathways closely related to the occurrence of CRC. These studies show that the down-regulation of ZNF880 gene is closely related to CRC, and the targeted change of the expression of its regulatory molecules (miRNA and lncRNA) may be a new perspective for CRC treatment.
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Affiliation(s)
- Xiangqian Dong
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, NO.295 Xichang Road, Kunming, 650032, P.R. China
- Yunnan Province Clinical Research Center for Digestive Diseases, Kunming, 650032, China
| | - Yinghui Zhang
- Department of Gastroenterology, Affiliated Hospital of Yunnan University, Kunming, 650021, China
| | - Yang Sun
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, NO.295 Xichang Road, Kunming, 650032, P.R. China
- Yunnan Province Clinical Research Center for Digestive Diseases, Kunming, 650032, China
| | - Qiong Nan
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, NO.295 Xichang Road, Kunming, 650032, P.R. China
- Yunnan Province Clinical Research Center for Digestive Diseases, Kunming, 650032, China
| | - Maojuan Li
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, NO.295 Xichang Road, Kunming, 650032, P.R. China
- Yunnan Province Clinical Research Center for Digestive Diseases, Kunming, 650032, China
| | - Lanqing Ma
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, NO.295 Xichang Road, Kunming, 650032, P.R. China
- Yunnan Province Clinical Research Center for Digestive Diseases, Kunming, 650032, China
| | - Lei Zhang
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, NO.295 Xichang Road, Kunming, 650032, P.R. China
- Yunnan Province Clinical Research Center for Digestive Diseases, Kunming, 650032, China
| | - Juan Luo
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, NO.295 Xichang Road, Kunming, 650032, P.R. China
- Yunnan Province Clinical Research Center for Digestive Diseases, Kunming, 650032, China
| | - Yating Qi
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, NO.295 Xichang Road, Kunming, 650032, P.R. China
- Yunnan Province Clinical Research Center for Digestive Diseases, Kunming, 650032, China
| | - Yinglei Miao
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, NO.295 Xichang Road, Kunming, 650032, P.R. China.
- Yunnan Province Clinical Research Center for Digestive Diseases, Kunming, 650032, China.
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Makaros Y, Raiff A, Timms RT, Wagh AR, Gueta MI, Bekturova A, Guez-Haddad J, Brodsky S, Opatowsky Y, Glickman MH, Elledge SJ, Koren I. Ubiquitin-independent proteasomal degradation driven by C-degron pathways. Mol Cell 2023; 83:1921-1935.e7. [PMID: 37201526 PMCID: PMC10237035 DOI: 10.1016/j.molcel.2023.04.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 03/13/2023] [Accepted: 04/25/2023] [Indexed: 05/20/2023]
Abstract
Although most eukaryotic proteins are targeted for proteasomal degradation by ubiquitination, a subset have been demonstrated to undergo ubiquitin-independent proteasomal degradation (UbInPD). However, little is known about the molecular mechanisms driving UbInPD and the degrons involved. Utilizing the GPS-peptidome approach, a systematic method for degron discovery, we found thousands of sequences that promote UbInPD; thus, UbInPD is more prevalent than currently appreciated. Furthermore, mutagenesis experiments revealed specific C-terminal degrons required for UbInPD. Stability profiling of a genome-wide collection of human open reading frames identified 69 full-length proteins subject to UbInPD. These included REC8 and CDCA4, proteins which control proliferation and survival, as well as mislocalized secretory proteins, suggesting that UbInPD performs both regulatory and protein quality control functions. In the context of full-length proteins, C termini also play a role in promoting UbInPD. Finally, we found that Ubiquilin family proteins mediate the proteasomal targeting of a subset of UbInPD substrates.
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Affiliation(s)
- Yaara Makaros
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Anat Raiff
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Richard T Timms
- Cambridge Institute of Therapeutic Immunology and Infectious Disease, Jeffrey Cheah Biomedical Centre, Cambridge Biomedical Campus, Cambridge, Cambridgeshire CB2 0AW, UK
| | - Ajay R Wagh
- Faculty of Biology, Technion-Israel Institute of Technology, Haifa 3525433, Israel
| | - Mor Israel Gueta
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Aizat Bekturova
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Julia Guez-Haddad
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Sagie Brodsky
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Yarden Opatowsky
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Michael H Glickman
- Faculty of Biology, Technion-Israel Institute of Technology, Haifa 3525433, Israel
| | - Stephen J Elledge
- Department of Genetics, Harvard Medical School, Division of Genetics, Brigham and Women's Hospital, Howard Hughes Medical Institute, Boston, MA 02115, USA
| | - Itay Koren
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel.
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A double-edged sword: role of apoptosis repressor with caspase recruitment domain (ARC) in tumorigenesis and ischaemia/reperfusion (I/R) injury. Apoptosis 2023; 28:313-325. [PMID: 36652128 DOI: 10.1007/s10495-022-01802-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/05/2022] [Indexed: 01/19/2023]
Abstract
Apoptosis repressor with caspase recruitment domain (ARC) acts as a potent and multifunctional inhibitor of apoptosis, which is mainly expressed in postmitotic cells, including cardiomyocytes. ARC is special for its N-terminal caspase recruitment domain and caspase recruitment domain. Due to the powerful inhibition of apoptosis, ARC is mainly reported to act as a cardioprotective factor during ischaemia‒reperfusion (I/R) injury, preventing cardiomyocytes from being devastated by various catastrophes, including oxidative stress, calcium overload, and mitochondrial dysfunction in the circulatory system. However, recent studies have found that ARC also plays a potential regulatory role in tumorigenesis especially in colorectal cancer and renal cell carcinomas, through multiple apoptosis-associated pathways, which remains to be explored in further studies. Therefore, ARC regulates the body and maintains the balance of physiological activities with its interesting duplex. This review summarizes the current research progress of ARC in the field of tumorigenesis and ischaemia/reperfusion injury, to provide overall research status and new possibilities for researchers.
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Agnarelli A, Vella V, Samuels M, Papanastasopoulos P, Giamas G. Incorporating Immunotherapy in the Management of Gastric Cancer: Molecular and Clinical Implications. Cancers (Basel) 2022; 14:cancers14184378. [PMID: 36139540 PMCID: PMC9496849 DOI: 10.3390/cancers14184378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/30/2022] [Accepted: 09/05/2022] [Indexed: 01/30/2023] Open
Abstract
Simple Summary Gastric cancer is one of the most common malignant tumours worldwide, with the fifth and third highest morbidity and mortality, respectively, of all cancers. Survival is limited, as most of the patients are diagnosed at an advanced stage, and are not suitable for surgery with a curative intent. Chemotherapy has only modestly improved patients’ outcomes and is mainly given with a palliative intent. Immunotherapy has improved overall survival of patients with gastric cancer, and has thus become a new standard of care in clinic. In this review we discuss the strong molecular rationale for the administration of immunotherapy in this disease and analyse the clinical data supporting its use. Abstract Gastric cancer has a median survival of 11 months, and this poor prognosis has not improved over the last 30 years. Recent pre-clinical data suggest that there is high tumour-related neoantigen expression in gastric cancer cells, suggesting that a clinical strategy that enhances the host’s immune system against cancer cells may be a successful approach to improve clinical outcomes. Additionally, there has been an increasing amount of translational evidence highlighting the relevance of PD-L1 expression in gastric cancer cells, indicating that PD-1/PD-L1 inhibitors may be useful. Several molecular subgroups of gastric cancer have been identified to respond with excellent outcomes to immunotherapy, including microsatellite instable tumours, tumours bearing a high tumour mutational burden, and tumours related to a chronic EBV infection. In gastric cancer, immunotherapy has produced durable responses in chemo-refractory patients; however, most recently there has been a lot of enthusiasm as several large-scale clinical trials highlight the improved survival noted from the incorporation of immunotherapy in the first line setting for advanced gastric cancer. Our review aims to discuss current pre-clinical and clinical data supporting the innovative role of immunotherapy in gastric cancer.
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Zhou JD, Xu ZJ, Jin Y, Zhang XL, Gu Y, Ma JC, Wen XM, Lin J, Zhang TJ, Qian J. Whole-Genome DNA Methylation Sequencing Reveals Epigenetic Changes in Myelodysplastic Syndromes. Front Oncol 2022; 12:897898. [PMID: 35847864 PMCID: PMC9277050 DOI: 10.3389/fonc.2022.897898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 05/26/2022] [Indexed: 11/16/2022] Open
Abstract
Epigenetic dysregulation of cancer-associated genes has been identified to contribute to the pathogenesis of myelodysplastic syndromes (MDS). However, few studies have elucidated the whole-genome DNA methylation in the initiation pathogenesis of MDS. Reduced representation bisulfite sequencing was performed in five de novo MDS patients and four controls to investigate epigenetic alterations in MDS pathogenesis. The mean global methylation in five MDS patients showed no significant difference compared with the four controls. In depth, a total of 1,459 differentially methylated fragments, including 759 hypermethylated and 700 hypomethylated fragments, were identified between MDS patients and controls. Targeted bisulfite sequencing further identified that hypermethylation of DLEU7, FOXR1, LEP, and PANX2 were frequent events in an additional cohort of MDS patients. Subsequently, LEP hypermethylation was confirmed by real-time quantitative methylation-specific PCR in an expanded cohort of larger MDS patients. In clinics, LEP hypermethylation tended to be associated with lower bone marrow blasts and was significantly correlated with U2AF1 mutation. Survival analysis indicated that LEP hypermethylation was associated with a markedly longer survival time but was not an independent prognostic biomarker in MDS patients. Functional studies revealed pro-proliferative and anti-apoptotic effects of leptin in the MDS cell line SKM-1, and it was significantly associated with cell growth and death as well as the Toll-like receptor and NF-kappa B signaling pathways. Collectively, our findings demonstrated that whole-genome DNA methylation analysis identified novel epigenetic alterations such as DLEU7, FOXR1, LEP, and PANX2 methylations as frequent events in MDS. Moreover, LEP might play a role in MDS pathogenesis, and LEP hypermethylation was associated with longer survival but not as an independent prognostic biomarker in MDS.
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Affiliation(s)
- Jing-dong Zhou
- Department of Hematology, Affiliated People’s Hospital of Jiangsu University, Zhenjiang, China
- Zhenjiang Clinical Research Center of Hematology, Zhenjiang, China
- The Key Lab of Precision Diagnosis and Treatment in Hematologic Malignancies of Zhenjiang City, Zhenjiang, China
| | - Zi-jun Xu
- Zhenjiang Clinical Research Center of Hematology, Zhenjiang, China
- The Key Lab of Precision Diagnosis and Treatment in Hematologic Malignancies of Zhenjiang City, Zhenjiang, China
- Laboratory Center, Affiliated People’s Hospital of Jiangsu University, Zhenjiang, China
| | - Ye Jin
- Department of Hematology, Affiliated People’s Hospital of Jiangsu University, Zhenjiang, China
- Zhenjiang Clinical Research Center of Hematology, Zhenjiang, China
- The Key Lab of Precision Diagnosis and Treatment in Hematologic Malignancies of Zhenjiang City, Zhenjiang, China
| | - Xin-long Zhang
- Department of Hematology, The People’s Hospital of Danyang, Zhenjiang, China
| | - Yu Gu
- Department of Hematology, Affiliated People’s Hospital of Jiangsu University, Zhenjiang, China
- Zhenjiang Clinical Research Center of Hematology, Zhenjiang, China
- The Key Lab of Precision Diagnosis and Treatment in Hematologic Malignancies of Zhenjiang City, Zhenjiang, China
| | - Ji-chun Ma
- Zhenjiang Clinical Research Center of Hematology, Zhenjiang, China
- The Key Lab of Precision Diagnosis and Treatment in Hematologic Malignancies of Zhenjiang City, Zhenjiang, China
- Laboratory Center, Affiliated People’s Hospital of Jiangsu University, Zhenjiang, China
| | - Xiang-mei Wen
- Zhenjiang Clinical Research Center of Hematology, Zhenjiang, China
- The Key Lab of Precision Diagnosis and Treatment in Hematologic Malignancies of Zhenjiang City, Zhenjiang, China
- Laboratory Center, Affiliated People’s Hospital of Jiangsu University, Zhenjiang, China
| | - Jiang Lin
- Zhenjiang Clinical Research Center of Hematology, Zhenjiang, China
- The Key Lab of Precision Diagnosis and Treatment in Hematologic Malignancies of Zhenjiang City, Zhenjiang, China
- Laboratory Center, Affiliated People’s Hospital of Jiangsu University, Zhenjiang, China
- *Correspondence: Jun Qian, ; Ting-juan Zhang, ; Jiang Lin,
| | - Ting-juan Zhang
- Zhenjiang Clinical Research Center of Hematology, Zhenjiang, China
- The Key Lab of Precision Diagnosis and Treatment in Hematologic Malignancies of Zhenjiang City, Zhenjiang, China
- Laboratory Center, Affiliated People’s Hospital of Jiangsu University, Zhenjiang, China
- Department of Oncology, Affiliated People’s Hospital of Jiangsu University, Zhenjiang, China
- *Correspondence: Jun Qian, ; Ting-juan Zhang, ; Jiang Lin,
| | - Jun Qian
- Department of Hematology, Affiliated People’s Hospital of Jiangsu University, Zhenjiang, China
- Zhenjiang Clinical Research Center of Hematology, Zhenjiang, China
- The Key Lab of Precision Diagnosis and Treatment in Hematologic Malignancies of Zhenjiang City, Zhenjiang, China
- *Correspondence: Jun Qian, ; Ting-juan Zhang, ; Jiang Lin,
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Wang X, Zhang L, Chan FKL, Ji J, Yu J, Liang JQ. Gamma-glutamyltransferase 7 suppresses gastric cancer by cooperating with RAB7 to induce mitophagy. Oncogene 2022; 41:3485-3497. [PMID: 35662282 DOI: 10.1038/s41388-022-02339-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 04/25/2022] [Accepted: 04/27/2022] [Indexed: 02/08/2023]
Abstract
We identified gamma-glutamyltransferase 7 (GGT7) to be frequently downregulated in gastric cancer, but its role remains unknown. Here we elucidated the clinical significance, functional roles, and molecular mechanism of GGT7 in gastric cancer. GGT7 was downregulated by promoter methylation and restored by demethylation treatment in gastric cancer cells. GGT7 methylation inversely correlated with mRNA expression in gastric tumors (n = 221; r = -0.686, P < 0.0001). High-expression of GGT7 in adjacent non-tumor tissues was significantly associated with favorable survival in gastric cancer patients (n = 138; P = 0.009), and was an independent prognostic factor by multivariate Cox regression (HR = 0.381, P < 0.05). GGT7 significantly inhibited gastric cancer cell growth, G1-S transition, and migration and invasion abilities. GGT7 also significantly attenuated the growth of subcutaneous xenograft tumors and reduced metastasis to the lung in nude mice. The mitophagy regulator RAB7 was identified as a direct downstream co-player of GGT7 by co-immunoprecipitation followed by mass spectrometry. Growth suppression effect of GGT7 was at least partly dependent on RAB7 by rescue experiments. GGT7 induced autophagy as shown by electron microscopy and confirmed by the increased LC3B and decreased p62. GGT7 recruited RAB7 by direct binding and drove RAB7 to translocate from nucleus to cytoplasm, subsequently mediating mitophagy by increasing mitophagy mediators/inducers. GGT7 inhibited intracellular ROS, which was associated with increased mitophagy, and subsequently suppressed MAPK signaling. Collectively, GGT7 plays a pivotal tumor-suppressing role in gastric cancer by directly binding with RAB7 to induce mitophagy and inhibit ROS and MAPK cascades. GGT7 is an independent prognostic factor for gastric cancer patients.
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Affiliation(s)
- Xiaohong Wang
- Institute of Digestive Disease and Department of Medicine and Therapeutics, State Key Laboratory of Digestive Disease, Li Ka Shing Institute of Health Sciences, CUHK Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong, China
- Key Laboratory of Carcinogenesis and Translational Research, Peking University Cancer Hospital and Institute, Beijing, China
| | - Lianhai Zhang
- Key Laboratory of Carcinogenesis and Translational Research, Peking University Cancer Hospital and Institute, Beijing, China
| | - Francis K L Chan
- Institute of Digestive Disease and Department of Medicine and Therapeutics, State Key Laboratory of Digestive Disease, Li Ka Shing Institute of Health Sciences, CUHK Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong, China
| | - Jiafu Ji
- Key Laboratory of Carcinogenesis and Translational Research, Peking University Cancer Hospital and Institute, Beijing, China.
| | - Jun Yu
- Institute of Digestive Disease and Department of Medicine and Therapeutics, State Key Laboratory of Digestive Disease, Li Ka Shing Institute of Health Sciences, CUHK Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong, China.
| | - Jessie Qiaoyi Liang
- Institute of Digestive Disease and Department of Medicine and Therapeutics, State Key Laboratory of Digestive Disease, Li Ka Shing Institute of Health Sciences, CUHK Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong, China.
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He S, Liu D, Chen Z. REC8 inhibits proliferation, migration and invasion of breast cancer cells by targeting CDC20. Mol Med Rep 2022; 26:235. [PMID: 35616161 PMCID: PMC9178687 DOI: 10.3892/mmr.2022.12751] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 11/25/2021] [Indexed: 11/06/2022] Open
Abstract
Breast cancer is one of the most types of common malignant tumor in women. REC8 is a known tumor suppressor in several types of cancer; however, the role of REC8 in breast cancer remains unknown. The purpose of the present study was to investigate the effects and underlying mechanism of REC8 on the proliferation, migration and invasion of breast cancer cells. The expression of REC8 in normal and breast cancer cells was detected by reverse transcription‑quantitative PCR and western blotting. Stable REC8‑overexpressing breast cancer cells were constructed to modify the expression of REC8. The expression of cell division cycle 20 (CDC20) in breast cancer cells was altered using the CDC20 inhibitor apcin. Cell viability, proliferation, migration, invasion and apoptosis were determined by Cell Counting Kit‑8, colony formation, wound healing, Transwell and TUNEL assays, respectively. Western blotting was performed to measure the expression of matrix metalloproteinase‑2/9 and apoptosis‑associated proteins [Bcl‑2, caspase‑3, cleaved caspase‑3 and cleaved poly (ADP‑ribose) polymerase]. Compared with normal breast cells, the expression of REC8 was lower in breast cancer cells. Search Tool for the Retrieval of Interacting Genes/Proteins online database was used to predict the interaction between REC8 and CDC20. Overexpression of REC8 significantly inhibited the proliferation, migration and invasion of breast cancer cells in vitro; these changes were reversed by CDC20 overexpression. In conclusion, the present study demonstrated that REC8 decreased proliferation, migration and invasion of breast cancer cells by inhibiting CDC20.
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Affiliation(s)
- Shaodan He
- Department of Emergency Medicine, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
| | - Danping Liu
- Department of Emergency Medicine, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
| | - Zhuanhong Chen
- Department of Emergency Medicine, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
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Lingg L, Rottenberg S, Francica P. Meiotic Genes and DNA Double Strand Break Repair in Cancer. Front Genet 2022; 13:831620. [PMID: 35251135 PMCID: PMC8895043 DOI: 10.3389/fgene.2022.831620] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 02/02/2022] [Indexed: 12/16/2022] Open
Abstract
Tumor cells show widespread genetic alterations that change the expression of genes driving tumor progression, including genes that maintain genomic integrity. In recent years, it has become clear that tumors frequently reactivate genes whose expression is typically restricted to germ cells. As germ cells have specialized pathways to facilitate the exchange of genetic information between homologous chromosomes, their aberrant regulation influences how cancer cells repair DNA double strand breaks (DSB). This drives genomic instability and affects the response of tumor cells to anticancer therapies. Since meiotic genes are usually transcriptionally repressed in somatic cells of healthy tissues, targeting aberrantly expressed meiotic genes may provide a unique opportunity to specifically kill cancer cells whilst sparing the non-transformed somatic cells. In this review, we highlight meiotic genes that have been reported to affect DSB repair in cancers derived from somatic cells. A better understanding of their mechanistic role in the context of homology-directed DNA repair in somatic cancers may provide useful insights to find novel vulnerabilities that can be targeted.
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Affiliation(s)
- Lea Lingg
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- Cancer Therapy Resistance Cluster, Department for BioMedical Research, University of Bern, Bern, Switzerland
| | - Sven Rottenberg
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- Cancer Therapy Resistance Cluster, Department for BioMedical Research, University of Bern, Bern, Switzerland
- Bern Center for Precision Medicine, University of Bern, Bern, Switzerland
- *Correspondence: Sven Rottenberg, ; Paola Francica,
| | - Paola Francica
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- Cancer Therapy Resistance Cluster, Department for BioMedical Research, University of Bern, Bern, Switzerland
- *Correspondence: Sven Rottenberg, ; Paola Francica,
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Abstract
REC8 meiotic recombination protein (REC8) is a member of structural maintenance of chromosome (SMC) protein partners, which play an important role in meiosis, anti-tumor, and sperm formation. As the adapter proteins of RLR signaling and cGAS-DNA signaling, the activity and stability of MAVS (also known as VISA, Cardif and IPS-1) and STING (also known as MITA) are critical for innate immunity. Here, we report that REC8 interacts with MAVS and STING, and inhibits their ubiquitination and subsequent degradation, thereby promoting innate antiviral signaling. REC8 is upregulated through the JAK-STAT signaling pathway under viral infection. Knockdown of REC8 impair the innate immune responses against VSV (Vesicular Stomatitis Virus), NDV (Newcastle disease virus) and HSV (herpes simplex virus). Mechanistically, under the infection of viruses, the SUMOylated REC8 is transferred from the nucleus to the cytoplasm and then interacts with MAVS and STING to inhibit their K48-linked ubiquitination triggered by RNF5. Moreover, REC8 promotes the recruitment of TBK1 to MAVS and STING. Thus, REC8 functions as a positive modulator of innate immunity. Our work highlights a previously undocumented role of meiosis-associated protein REC8 in regulating innate immunity. IMPORTANCE The innate immune response is crucial for the host to resist the invasion of viruses and other pathogens. STING and MAVS play a critical role in the innate immune response to DNA and RNA viral infection, respectively. In this study, REC8 promotes the innate immune response by targeting STING and MAVS. Notably, REC8 interacts with MAVS and STING in the cytoplasm and inhibits K48-linked ubiquitination of MAVS and STING triggered by RNF5, stabilizing MAVS and STING protein to promote innate immunity and gradually inhibiting viral infection. Our study provides a new insight for the study of antiviral innate immune.
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Kinases and therapeutics in pathogen mediated gastric cancer. Mol Biol Rep 2022; 49:2519-2530. [PMID: 35031925 DOI: 10.1007/s11033-021-07063-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 12/08/2021] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Many pathogens have coexisted with humans for millennia and can cause chronic inflammation which is the cause of gastritis. Gastric cancer (GC) is associated with 8.8% of cancer related deaths, making it one of the leading causes of cancer related deaths worldwide. This review is intended to give brief information about Helicobacter pylori (H. pylori), Epstein-Barr virus (EBV), human cytomegalovirus (HCMV) role in GC and associated kinases. These organisms can trigger multiple cellular pathways aiming for unnatural cellular proliferation, apoptosis, migration and inflammatory response. Kinases also can activate and deactivate the signalling leading to aforementioned pathways. Therefore, studying kinases is inevitable. MATERIAL AND METHODS This review is the comprehensive collection of information from different data sources such as journals, book, book chapters and verified online information. CONCLUSION Kinase amplifications could be used as diagnostic, prognostic, and predictive biomarkers in various cancer types. Hence targeting kinase and related signalling molecules could be considered as a potential approach to prevent cancer through these organisms. Here we summarize the brief information about the role of kinases, signalling and their therapeutics in GC concerning H. pylori, EBV and HCMV.
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Zhou X, Xie X, Liu T, Chen S, Wang Y, Zhang J, Wang S, Wang Y, Dou S, Qi R, Kang N, Zhang D, Jin X, Cui R, Jiang H. REC8 enhances stemness and promotes metastasis of colorectal cancer through BTK/Akt/β-catenin signaling pathway. Transl Oncol 2021; 15:101305. [PMID: 34890967 DOI: 10.1016/j.tranon.2021.101305] [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] [Received: 11/23/2021] [Accepted: 11/29/2021] [Indexed: 12/11/2022] Open
Abstract
Cancer/testis antigens (CTAs) are often aberrantly expressed in cancer stem cells (CSCs) which are responsible for tumor metastasis. Rec8 meiotic recombination protein (REC8), a member of CTAs, shares distinct roles in various cancers, while its contribution to CSCs and colorectal cancer (CRC) remains unclear. We found that overexpression of REC8 facilitated the migration and invasion of CRC cells (DLD-1 and SW480 cells) in vitro and promoted the liver metastasis of CRC in vivo. Moreover, REC8 is highly expressed in CRC stem-like cells and is required for the maintenance of CSC stemness. Mechanistic studies suggested that REC8 mediated through the activation of Bruton tyrosine kinase (BTK). Inhibition of BTK by ibrutinib not only suppressed the migration and invasion-promoting ability, but also declined the increased expression of p-BTK, p-Akt, β-catenin, and CSC markers upon REC8 overexpression. Importantly, high expression of REC8 in cancerous tissues was related to advanced clinical stage and lymph node metastasis of 62 CRC patients, and REC8 was enriched in the cancerous cells positive for CSC markers. Collectively, our results indicate that REC8 promotes CRC metastasis by increasing cell stemness through BTK/Akt/β-catenin pathway.
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Affiliation(s)
- Xue Zhou
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, Shijiazhuang, Hebei, China
| | - Xiaoli Xie
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, Shijiazhuang, Hebei, China
| | - Ting Liu
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, Shijiazhuang, Hebei, China
| | - Shengxiong Chen
- Department of Hepatobiliary Surgery, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Yijun Wang
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, Shijiazhuang, Hebei, China
| | - Jiuna Zhang
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, Shijiazhuang, Hebei, China
| | - Shuling Wang
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, Shijiazhuang, Hebei, China
| | - Yongjuan Wang
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, Shijiazhuang, Hebei, China
| | - Shiying Dou
- Department of Infectious Diseases, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Ran Qi
- Department of General Practice, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Ning Kang
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, Shijiazhuang, Hebei, China
| | - Dongxuan Zhang
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, Shijiazhuang, Hebei, China
| | - Xiaoxu Jin
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, Shijiazhuang, Hebei, China
| | - Ruolin Cui
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, Shijiazhuang, Hebei, China
| | - Huiqing Jiang
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, Shijiazhuang, Hebei, China.
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12
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Samec M, Liskova A, Koklesova L, Zhai K, Varghese E, Samuel SM, Šudomová M, Lucansky V, Kassayova M, Pec M, Biringer K, Brockmueller A, Kajo K, Hassan STS, Shakibaei M, Golubnitschaja O, Büsselberg D, Kubatka P. Metabolic Anti-Cancer Effects of Melatonin: Clinically Relevant Prospects. Cancers (Basel) 2021; 13:3018. [PMID: 34208645 PMCID: PMC8234897 DOI: 10.3390/cancers13123018] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 06/04/2021] [Accepted: 06/14/2021] [Indexed: 02/06/2023] Open
Abstract
Metabolic reprogramming characterized by alterations in nutrient uptake and critical molecular pathways associated with cancer cell metabolism represents a fundamental process of malignant transformation. Melatonin (N-acetyl-5-methoxytryptamine) is a hormone secreted by the pineal gland. Melatonin primarily regulates circadian rhythms but also exerts anti-inflammatory, anti-depressant, antioxidant and anti-tumor activities. Concerning cancer metabolism, melatonin displays significant anticancer effects via the regulation of key components of aerobic glycolysis, gluconeogenesis, the pentose phosphate pathway (PPP) and lipid metabolism. Melatonin treatment affects glucose transporter (GLUT) expression, glucose-6-phosphate dehydrogenase (G6PDH) activity, lactate production and other metabolic contributors. Moreover, melatonin modulates critical players in cancer development, such as HIF-1 and p53. Taken together, melatonin has notable anti-cancer effects at malignancy initiation, progression and metastasing. Further investigations of melatonin impacts relevant for cancer metabolism are expected to create innovative approaches supportive for the effective prevention and targeted therapy of cancers.
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Affiliation(s)
- Marek Samec
- Clinic of Obstetrics and Gynecology, Jessenius Faculty of Medicine, Comenius University in Bratislava, 03601 Martin, Slovakia; (M.S.); (A.L.); (L.K.); (K.B.)
| | - Alena Liskova
- Clinic of Obstetrics and Gynecology, Jessenius Faculty of Medicine, Comenius University in Bratislava, 03601 Martin, Slovakia; (M.S.); (A.L.); (L.K.); (K.B.)
| | - Lenka Koklesova
- Clinic of Obstetrics and Gynecology, Jessenius Faculty of Medicine, Comenius University in Bratislava, 03601 Martin, Slovakia; (M.S.); (A.L.); (L.K.); (K.B.)
| | - Kevin Zhai
- Department of Physiology and Biophysics, Weill Cornell Medicine-Qatar, Education City, Qatar Foundation, Doha P.O. Box 24144, Qatar; (K.Z.); (E.V.); (S.M.S.)
| | - Elizabeth Varghese
- Department of Physiology and Biophysics, Weill Cornell Medicine-Qatar, Education City, Qatar Foundation, Doha P.O. Box 24144, Qatar; (K.Z.); (E.V.); (S.M.S.)
| | - Samson Mathews Samuel
- Department of Physiology and Biophysics, Weill Cornell Medicine-Qatar, Education City, Qatar Foundation, Doha P.O. Box 24144, Qatar; (K.Z.); (E.V.); (S.M.S.)
| | - Miroslava Šudomová
- Museum of Literature in Moravia, Klašter 1, 66461 Rajhrad, Czech Republic;
| | - Vincent Lucansky
- Biomedical Centre Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Mala Hora 4D, 036 01 Martin, Slovakia;
| | - Monika Kassayova
- Department of Animal Physiology, Institute of Biology and Ecology, Faculty of Science, P. J. Šafarik University, 04001 Košice, Slovakia;
| | - Martin Pec
- Department of Medical Biology, Jessenius Faculty of Medicine, Comenius University in Bratislava, 03601 Martin, Slovakia;
| | - Kamil Biringer
- Clinic of Obstetrics and Gynecology, Jessenius Faculty of Medicine, Comenius University in Bratislava, 03601 Martin, Slovakia; (M.S.); (A.L.); (L.K.); (K.B.)
| | - Aranka Brockmueller
- Musculoskeletal Research Group and Tumour Biology, Chair of Vegetative Anatomy, Institute of Anatomy, Faculty of Medicine, Ludwig-Maximilian-University Munich, D-80336 Munich, Germany; (A.B.); (M.S.)
| | - Karol Kajo
- Department of Pathology, St. Elizabeth Cancer Institute Hospital, 81250 Bratislava, Slovakia;
- Biomedical Research Centre, Slovak Academy of Sciences, 81439 Bratislava, Slovakia
| | - Sherif T. S. Hassan
- Department of Applied Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic;
| | - Mehdi Shakibaei
- Musculoskeletal Research Group and Tumour Biology, Chair of Vegetative Anatomy, Institute of Anatomy, Faculty of Medicine, Ludwig-Maximilian-University Munich, D-80336 Munich, Germany; (A.B.); (M.S.)
| | - Olga Golubnitschaja
- European Association for Predictive, Preventive and Personalised Medicine, EPMA, 1160 Brussels, Belgium;
- Predictive, Preventive and Personalised (3P) Medicine, Department of Radiation Oncology, University Hospital Bonn, Rheinische Friedrich-Wilhelms-Universität Bonn, 53127 Bonn, Germany
| | - Dietrich Büsselberg
- Department of Physiology and Biophysics, Weill Cornell Medicine-Qatar, Education City, Qatar Foundation, Doha P.O. Box 24144, Qatar; (K.Z.); (E.V.); (S.M.S.)
| | - Peter Kubatka
- Department of Medical Biology, Jessenius Faculty of Medicine, Comenius University in Bratislava, 03601 Martin, Slovakia;
- European Association for Predictive, Preventive and Personalised Medicine, EPMA, 1160 Brussels, Belgium;
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13
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Wu CY, Lau BT, Kim HS, Sathe A, Grimes SM, Ji HP, Zhang NR. Integrative single-cell analysis of allele-specific copy number alterations and chromatin accessibility in cancer. Nat Biotechnol 2021; 39:1259-1269. [PMID: 34017141 DOI: 10.1038/s41587-021-00911-w] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 04/01/2021] [Indexed: 12/12/2022]
Abstract
Cancer progression is driven by both somatic copy number aberrations (CNAs) and chromatin remodeling, yet little is known about the interplay between these two classes of events in shaping the clonal diversity of cancers. We present Alleloscope, a method for allele-specific copy number estimation that can be applied to single-cell DNA- and/or transposase-accessible chromatin-sequencing (scDNA-seq, ATAC-seq) data, enabling combined analysis of allele-specific copy number and chromatin accessibility. On scDNA-seq data from gastric, colorectal and breast cancer samples, with validation using matched linked-read sequencing, Alleloscope finds pervasive occurrence of highly complex, multiallelic CNAs, in which cells that carry varying allelic configurations adding to the same total copy number coevolve within a tumor. On scATAC-seq from two basal cell carcinoma samples and a gastric cancer cell line, Alleloscope detected multiallelic copy number events and copy-neutral loss-of-heterozygosity, enabling dissection of the contributions of chromosomal instability and chromatin remodeling to tumor evolution.
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Affiliation(s)
- Chi-Yun Wu
- Graduate Group in Genomics and Computational Biology, University of Pennsylvania, Philadelphia, PA, USA.,Department of Statistics, University of Pennsylvania, Philadelphia, PA, USA
| | - Billy T Lau
- Division of Oncology, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA.,Stanford Genome Technology Center, Stanford University, Palo Alto, CA, USA
| | - Heon Seok Kim
- Division of Oncology, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Anuja Sathe
- Division of Oncology, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Susan M Grimes
- Division of Oncology, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Hanlee P Ji
- Division of Oncology, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA. .,Stanford Genome Technology Center, Stanford University, Palo Alto, CA, USA.
| | - Nancy R Zhang
- Graduate Group in Genomics and Computational Biology, University of Pennsylvania, Philadelphia, PA, USA. .,Department of Statistics, University of Pennsylvania, Philadelphia, PA, USA.
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14
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Palrasu M, Zaika E, El-Rifai W, Que J, Zaika AI. Role of Bacterial and Viral Pathogens in Gastric Carcinogenesis. Cancers (Basel) 2021; 13:1878. [PMID: 33919876 PMCID: PMC8070847 DOI: 10.3390/cancers13081878] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 04/02/2021] [Accepted: 04/11/2021] [Indexed: 01/10/2023] Open
Abstract
Gastric cancer (GC) is one of the deadliest malignancies worldwide. In contrast to many other tumor types, gastric carcinogenesis is tightly linked to infectious events. Infections with Helicobacter pylori (H. pylori) bacterium and Epstein-Barr virus (EBV) are the two most investigated risk factors for GC. These pathogens infect more than half of the world's population. Fortunately, only a small fraction of infected individuals develops GC, suggesting high complexity of tumorigenic processes in the human stomach. Recent studies suggest that the multifaceted interplay between microbial, environmental, and host genetic factors underlies gastric tumorigenesis. Many aspects of these interactions still remain unclear. In this review, we update on recent discoveries, focusing on the roles of various gastric pathogens and gastric microbiome in tumorigenesis.
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Affiliation(s)
- Manikandan Palrasu
- Department of Surgery, University of Miami, Miami, FL 33136, USA; (M.P.); (E.Z.); (W.E.-R.)
| | - Elena Zaika
- Department of Surgery, University of Miami, Miami, FL 33136, USA; (M.P.); (E.Z.); (W.E.-R.)
| | - Wael El-Rifai
- Department of Surgery, University of Miami, Miami, FL 33136, USA; (M.P.); (E.Z.); (W.E.-R.)
- Department of Veterans Affairs, Miami VA Healthcare System, Miami, FL 33136, USA
| | - Jianwen Que
- Department of Medicine, Columbia University Medical Center, New York, NY 10032, USA;
| | - Alexander I. Zaika
- Department of Surgery, University of Miami, Miami, FL 33136, USA; (M.P.); (E.Z.); (W.E.-R.)
- Department of Veterans Affairs, Miami VA Healthcare System, Miami, FL 33136, USA
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15
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Wang Q, Lin F, He Q, Huang Q, Duan X, Liu X, Xiao S, Yang H, Zhao H. Cloning and characterization of rec8 gene in orange-spotted grouper (Epinephelus coioides) and Dmrt1 regulation of rec8 promoter activity. FISH PHYSIOLOGY AND BIOCHEMISTRY 2021; 47:393-407. [PMID: 33547601 DOI: 10.1007/s10695-020-00920-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 12/14/2020] [Indexed: 06/12/2023]
Abstract
Meiosis is a specialized type of cell division critical for gamete production during sexual reproduction in eukaryotes. The meiotic recombination protein Rec8 has been identified as an important factor in germ cell meiotic initiation in vertebrates; however, its equivalent role in teleosts is poorly characterized. In this study, we cloned and sequenced the rec8 gene from orange-spotted grouper (Epinephelus coioides). The cDNA sequence consisted of 2244 base pairs (bp), including a 5' untranslated region (UTR) of 198 bp and a 3'UTR of 284 bp. The open reading frame of grouper rec8 was 1752 bp, encoding 584 amino acids. Expression levels of rec8 were higher in the ovary, intersex gonad, and testis. A neighbor-joining phylogenetic tree based on the deduced amino acid sequence indicated a common origin for grouper and other teleost rec8 molecules. Immunohistochemistry using a polyclonal anti-Rec8 antibody localized the protein in the oogonia and primary oocytes in the ovary and in spermatogonia and spermatocytes in the intersex gonad and testis, suggesting that Rec8 may play an important role in the meiotic division and the development of grouper germ cells. In addition, we found that the transcription factor Dmrt1 increased rec8 promoter activity through the second binding site, based on dual-luciferase assays. Together, these results suggest that Rec8 plays a crucial role in meiosis and may be regulated by Dmrt1 to affect meiosis in groupers.
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Affiliation(s)
- Qing Wang
- College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, People's Republic of China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, People's Republic of China
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, Guangzhou, 510642, People's Republic of China
| | - Fangmei Lin
- College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Qi He
- College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Qifeng Huang
- College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Xuzhuo Duan
- College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Xiaochun Liu
- College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Shiqiang Xiao
- College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Huirong Yang
- College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, People's Republic of China.
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, People's Republic of China.
| | - HuiHong Zhao
- College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, People's Republic of China.
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, People's Republic of China.
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, Guangzhou, 510642, People's Republic of China.
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16
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Han J, Bai Y, Wang J, Xie XL, Li AD, Ding Q, Cui ZJ, Yin J, Jiang XY, Jiang HQ. REC8 promotes tumor migration, invasion and angiogenesis by targeting the PKA pathway in hepatocellular carcinoma. Clin Exp Med 2021; 21:479-492. [PMID: 33677646 DOI: 10.1007/s10238-021-00698-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 02/18/2021] [Indexed: 01/07/2023]
Abstract
REC8 is a member of the cohesin family, and its abnormal activation has been detected in cancer cells. This study explored the role and possible mechanism of REC8 in hepatocellular carcinoma (HCC). A total of 40 pairs of HCC and adjacent tissues were collected, and the clinical significance of REC8 expression in HCC was evaluated. REC8 expression in human HCC tissues and HCC cell lines was investigated by quantitative real-time PCR, Western blotting, immunohistochemistry and immunofluorescence staining. The biological functions of REC8 in HCC cell lines were detected by wound-healing assay, Matrigel invasion assay and tube formation assay. The proteins interacting with REC8 were identified by mass spectrometry after immunoprecipitation screening. There was a correlation between the high expression of REC8 and positive alpha-fetoprotein levels. The expression level of REC8 protein in HCC tissues was higher than that in adjacent tissues. REC8 has mainly located in the nucleus of HCC tissue cells and HCC cell lines, but it was expressed in the cytoplasm of adjacent normal tissue cells and hepatocytes. The results of wound healing, transwell invasion and tubular formation assays indicated that the overexpression of REC8 accelerated the metastasis of HCC in vitro; however, metastasis was suppressed after REC8 was silenced by small interference RNA. A total of 57 differentially expressed proteins were identified by mass spectrometry, and it was found that REC8 and PKA RII-α staining was colocalized in the nucleus. The expression levels of MMP-9 and VEGF-C were decreased after treatment with the PKA inhibitor H89. Overall, REC8 promotes the migration, invasion and angiogenesis of HCC cells through the PKA pathway.
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Affiliation(s)
- Jing Han
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, No. 215, Heping West Road, Shijiazhuang, 050000, Hebei, China.,Department of Gastroenterology, The First Central Hospital of Baoding, Baoding, 071000, Hebei, China
| | - Yun Bai
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, No. 215, Heping West Road, Shijiazhuang, 050000, Hebei, China
| | - Jia Wang
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, No. 215, Heping West Road, Shijiazhuang, 050000, Hebei, China
| | - Xiao-Li Xie
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, No. 215, Heping West Road, Shijiazhuang, 050000, Hebei, China
| | - Ai-di Li
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, No. 215, Heping West Road, Shijiazhuang, 050000, Hebei, China
| | - Qian Ding
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, No. 215, Heping West Road, Shijiazhuang, 050000, Hebei, China
| | - Zi-Jin Cui
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, No. 215, Heping West Road, Shijiazhuang, 050000, Hebei, China
| | - Jie Yin
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, No. 215, Heping West Road, Shijiazhuang, 050000, Hebei, China
| | - Xiao-Yu Jiang
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, No. 215, Heping West Road, Shijiazhuang, 050000, Hebei, China
| | - Hui-Qing Jiang
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Hebei Clinical Research Center for Digestive Diseases, No. 215, Heping West Road, Shijiazhuang, 050000, Hebei, China.
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17
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Cao Y, Xie L, Shi F, Tang M, Li Y, Hu J, Zhao L, Zhao L, Yu X, Luo X, Liao W, Bode AM. Targeting the signaling in Epstein-Barr virus-associated diseases: mechanism, regulation, and clinical study. Signal Transduct Target Ther 2021; 6:15. [PMID: 33436584 PMCID: PMC7801793 DOI: 10.1038/s41392-020-00376-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 09/30/2020] [Accepted: 10/15/2020] [Indexed: 12/11/2022] Open
Abstract
Epstein–Barr virus-associated diseases are important global health concerns. As a group I carcinogen, EBV accounts for 1.5% of human malignances, including both epithelial- and lymphatic-originated tumors. Moreover, EBV plays an etiological and pathogenic role in a number of non-neoplastic diseases, and is even involved in multiple autoimmune diseases (SADs). In this review, we summarize and discuss some recent exciting discoveries in EBV research area, which including DNA methylation alterations, metabolic reprogramming, the changes of mitochondria and ubiquitin-proteasome system (UPS), oxidative stress and EBV lytic reactivation, variations in non-coding RNA (ncRNA), radiochemotherapy and immunotherapy. Understanding and learning from this advancement will further confirm the far-reaching and future value of therapeutic strategies in EBV-associated diseases.
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Affiliation(s)
- Ya Cao
- Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Radiology, Xiangya Hospital, Central South University, 410078, Changsha, China. .,Cancer Research Institute and School of Basic Medical Science, Xiangya School of Medicine, Central South University, 410078, Changsha, China. .,Key Laboratory of Carcinogenesis, Chinese Ministry of Health, 410078, Changsha, China. .,Research Center for Technologies of Nucleic Acid-Based Diagnostics and Therapeutics Hunan Province, 410078, Changsha, China. .,Molecular Imaging Research Center of Central South University, 410008, Changsha, Hunan, China. .,National Joint Engineering Research Center for Genetic Diagnostics of Infectious Diseases and Cancer, 410078, Changsha, China. .,Department of Radiology, Xiangya Hospital, Central South University, 410078, Changsha, China.
| | - Longlong Xie
- Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Radiology, Xiangya Hospital, Central South University, 410078, Changsha, China.,Cancer Research Institute and School of Basic Medical Science, Xiangya School of Medicine, Central South University, 410078, Changsha, China.,Key Laboratory of Carcinogenesis, Chinese Ministry of Health, 410078, Changsha, China
| | - Feng Shi
- Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Radiology, Xiangya Hospital, Central South University, 410078, Changsha, China.,Cancer Research Institute and School of Basic Medical Science, Xiangya School of Medicine, Central South University, 410078, Changsha, China.,Key Laboratory of Carcinogenesis, Chinese Ministry of Health, 410078, Changsha, China
| | - Min Tang
- Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Radiology, Xiangya Hospital, Central South University, 410078, Changsha, China.,Cancer Research Institute and School of Basic Medical Science, Xiangya School of Medicine, Central South University, 410078, Changsha, China.,Key Laboratory of Carcinogenesis, Chinese Ministry of Health, 410078, Changsha, China.,Molecular Imaging Research Center of Central South University, 410008, Changsha, Hunan, China
| | - Yueshuo Li
- Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Radiology, Xiangya Hospital, Central South University, 410078, Changsha, China.,Cancer Research Institute and School of Basic Medical Science, Xiangya School of Medicine, Central South University, 410078, Changsha, China.,Key Laboratory of Carcinogenesis, Chinese Ministry of Health, 410078, Changsha, China
| | - Jianmin Hu
- Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Radiology, Xiangya Hospital, Central South University, 410078, Changsha, China.,Cancer Research Institute and School of Basic Medical Science, Xiangya School of Medicine, Central South University, 410078, Changsha, China.,Key Laboratory of Carcinogenesis, Chinese Ministry of Health, 410078, Changsha, China
| | - Lin Zhao
- Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Radiology, Xiangya Hospital, Central South University, 410078, Changsha, China.,Cancer Research Institute and School of Basic Medical Science, Xiangya School of Medicine, Central South University, 410078, Changsha, China.,Key Laboratory of Carcinogenesis, Chinese Ministry of Health, 410078, Changsha, China
| | - Luqing Zhao
- Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Radiology, Xiangya Hospital, Central South University, 410078, Changsha, China
| | - Xinfang Yu
- Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Radiology, Xiangya Hospital, Central South University, 410078, Changsha, China.,Cancer Research Institute and School of Basic Medical Science, Xiangya School of Medicine, Central South University, 410078, Changsha, China.,Key Laboratory of Carcinogenesis, Chinese Ministry of Health, 410078, Changsha, China
| | - Xiangjian Luo
- Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Radiology, Xiangya Hospital, Central South University, 410078, Changsha, China.,Cancer Research Institute and School of Basic Medical Science, Xiangya School of Medicine, Central South University, 410078, Changsha, China.,Key Laboratory of Carcinogenesis, Chinese Ministry of Health, 410078, Changsha, China.,Molecular Imaging Research Center of Central South University, 410008, Changsha, Hunan, China
| | - Weihua Liao
- Department of Radiology, Xiangya Hospital, Central South University, 410078, Changsha, China
| | - Ann M Bode
- The Hormel Institute, University of Minnesota, Austin, MN, 55912, USA
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18
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Sun K, Jia K, Lv H, Wang SQ, Wu Y, Lei H, Chen X. EBV-Positive Gastric Cancer: Current Knowledge and Future Perspectives. Front Oncol 2020; 10:583463. [PMID: 33381453 PMCID: PMC7769310 DOI: 10.3389/fonc.2020.583463] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 09/09/2020] [Indexed: 12/16/2022] Open
Abstract
Gastric cancer is the fifth most common malignant tumor and second leading cause of cancer-related deaths worldwide. With the improved understanding of gastric cancer, a subset of gastric cancer patients infected with Epstein–Barr virus (EBV) has been identified. EBV-positive gastric cancer is a type of tumor with unique genomic aberrations, significant clinicopathological features, and a good prognosis. After EBV infects the human body, it first enters an incubation period in which the virus integrates its DNA into the host and expresses the latent protein and then affects DNA methylation through miRNA under the action of the latent protein, which leads to the occurrence of EBV-positive gastric cancer. With recent developments in immunotherapy, better treatment of EBV-positive gastric cancer patients appears achievable. Moreover, studies show that treatment with immunotherapy has a high effective rate in patients with EBV-positive gastric cancer. This review summarizes the research status of EBV-positive gastric cancer in recent years and indicates areas for improvement of clinical practice.
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Affiliation(s)
- Keran Sun
- Department of Oncology, The Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, China
| | - Keqi Jia
- Department of Pathology, Pathology Department of Hebei Medical University, Shijiazhuang, China
| | - Huifang Lv
- Department of Oncology, The Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, China
| | - Sai-Qi Wang
- Department of Oncology, The Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, China
| | - Yan Wu
- Department of Oncology, The Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, China
| | - Huijun Lei
- Department of Oncology, The Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, China
| | - Xiaobing Chen
- Department of Oncology, The Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, China
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19
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Liu M, Xu W, Su M, Fan P. REC8 suppresses tumor angiogenesis by inhibition of NF-κB-mediated vascular endothelial growth factor expression in gastric cancer cells. Biol Res 2020; 53:41. [PMID: 32958054 PMCID: PMC7507279 DOI: 10.1186/s40659-020-00307-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 09/07/2020] [Indexed: 12/16/2022] Open
Abstract
Background Tumor angiogenesis is an essential event for tumor growth and metastasis. It has been showed that REC8, a component of the meiotic cohesion complex, played a vital role in Epithelial-Mesenchymal Transition (EMT) in gastric cancer. However, the role of REC8 in gastric cancer angiogenesis remains to be identified. Results Inhibition of REC8 expression in gastric cancer cells contributed to tumor angiogenesis in the gastric cancer microenvironment. The clinical analysis demonstrated that the loss of REC8 in gastric cancer with enrichment of MVD. Depletion of REC8 expression in gastric cancer cells significantly increased tube formation of human umbilical vein endothelial cells (HUVECs), which is attributed to enhancement of vascular endothelial growth factor (VEGF) secretion caused by REC8 slicing. While addition of neutralizing antibody targeted VEGF into supernatant drastically reversed the effect of REC8 loss in gastric cancer cells on tube formation. Mechanistic analyses indicated that ablation of REC8 promotes nuclear factor-κB (NF-κB) p65 activity and its downstream gene VEGF expression, leading to tube formation. Conclusions These results demonstrated a novel REC8 function that suppressed tumor angiogenesis and progression by attenuation of VEGF in gastric cancer microenvironment. Electronic supplementary material The online version of this article (10.1186/s40659-020-00307-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Miao Liu
- Anhui Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, Shandong, China.,The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Heifei, 230031, Anhui, China
| | - Wanfu Xu
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, 510623, China.,Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, 510623, China
| | - Mingmin Su
- Department of Cancer Biology and Therapeutics, School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Wales, CF103AT, UK
| | - Pingsheng Fan
- Anhui Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, Shandong, China. .,The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Heifei, 230031, Anhui, China. .,Department of Oncology, Anhui Provincial Cancer Hospital, Hefei, Anhui, 230001, P.R. China.
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20
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Gantchev J, Martínez Villarreal A, Gunn S, Zetka M, Ødum N, Litvinov IV. The ectopic expression of meiCT genes promotes meiomitosis and may facilitate carcinogenesis. Cell Cycle 2020; 19:837-854. [PMID: 32223693 DOI: 10.1080/15384101.2020.1743902] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Cancer meiomitosis is defined as the concurrent activation of both mitotic and meiotic machineries in neoplastic cells that confer a selective advantage together with increased genomic instability. MeiCT (meiosis-specific cancer/testis) genes that perform specialized functions in the germline events required for the first meiotic division are ectopically expressed in several cancers. Here we describe the expression profiles of meiCT genes and proteins across a number of cancers and review the proposed mechanisms that increase aneuploidy and elicit reduction division in polyploid cells. These mechanisms are centered on the overexpression and function of meiCT proteins in cancers under various conditions that includes a response to genotoxic stress. Since meiCT genes are transcriptionally repressed in somatic cells, their target offers a promising therapeutic approach with limited toxicity to healthy tissues. Throughout the review, we provide a detailed description of the roles for each gene in the context of meiosis and we discuss proposed functions and outcomes resulting from their ectopic reactivation in cancer.
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Affiliation(s)
- Jennifer Gantchev
- Division of Dermatology, Department of Medicine, McGill University Health Centre, Montreal, QC, Canada
| | | | - Scott Gunn
- Division of Dermatology, Department of Medicine, McGill University Health Centre, Montreal, QC, Canada
| | - Monique Zetka
- Department of Biology, McGill University, Montreal, QC, Canada
| | - Neils Ødum
- Department of Microbiology and Immunology, The University of Copenhagen, Copenhagen, Denmark
| | - Ivan V Litvinov
- Division of Dermatology, Department of Medicine, McGill University Health Centre, Montreal, QC, Canada
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21
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Gastric cancer: genome damaged by bugs. Oncogene 2020; 39:3427-3442. [PMID: 32123313 PMCID: PMC7176583 DOI: 10.1038/s41388-020-1241-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 02/18/2020] [Accepted: 02/20/2020] [Indexed: 12/20/2022]
Abstract
Gastric cancer (GC) is one of the leading causes of cancer-related death worldwide. The role of the microorganisms in gastric tumorigenesis attracts much attention in recent years. These microorganisms include bacteria, virus, and fungi. Among them, Helicobacter pylori (H. pylori) infection is by far the most important risk factor for GC development, with special reference to the early-onset cases. H. pylori targets multiple cellular components by utilizing various virulence factors to modulate the host proliferation, apoptosis, migration, and inflammatory response. Epstein–Barr virus (EBV) serves as another major risk factor in gastric carcinogenesis. The virus protein, EBER noncoding RNA, and EBV miRNAs contribute to the tumorigenesis by modulating host genome methylation and gene expression. In this review, we summarized the related reports about the colonized microorganism in the stomach and discussed their specific roles in gastric tumorigenesis. Meanwhile, we highlighted the therapeutic significance of eradicating the microorganisms in GC treatment.
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22
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Song LB, Zhang QJ, Hou XY, Xiu YY, Chen L, Song NH, Lu Y. A twelve-gene signature for survival prediction in malignant melanoma patients. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:312. [PMID: 32355756 PMCID: PMC7186619 DOI: 10.21037/atm.2020.02.132] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Background Melanoma is defined as a highly mutational heterogeneous disease containing numerous alternations of the molecule. However, due to the phenotypically and genetically heterogeneity of malignant melanoma, conventional clinical characteristics remain restricted or limited in the ability to accurately predict individual outcomes and survival. This study aimed to establish an accurate gene expression signature to predict melanoma prognosis. Methods In this study, we established an RNA sequencing-based 12-gene signature data of melanoma patients obtained from 2 independent databases: the Cancer Genome Atlas (TCGA) database and the Gene Expression Omnibus (GEO) database. We evaluated the quality of each gene to predict survival conditions in each database by employing univariate and multivariate regression models. A prognostic risk score based on a prognostic signature was determined. This prognostic gene signature further classified patients into low-risk and high-risk groups. Results Based on a prognostic signature, a prognostic risk score was determined. This prognostic gene signature further divided the patients into low-risk and high-risk groups. In the chemotherapy and radiotherapy groups of the TCGA cohort and V-raf murine sarcoma viral oncogene homolog B1 (BRAF) expression group in the GEO cohort, patients in the low-risk group had a longer survival duration compared to patients in the high-risk group. Nevertheless, the immunotherapy group in the TCGA database and neuroblastoma RAS viral oncogene homolog (NRAS) expression group in the GEO database had no significant differences in statistics. Moreover, this gene signature was associated with patient prognosis regardless of whether the Breslow depth was greater than or less than 3.75 mm. Stratified gene set enrichment analysis (GSEA) revealed that certain immune-related pathways, such as the T-cell signaling pathway, chemokine signaling pathway, and primary immunodeficiency, were significantly enriched in the low-risk group of both TCGA and GEO cohorts. This information implied the immune-related properties of the 12-gene signature. Conclusions Our study emphasizes the significance of the gene expression signature in that it may be an indispensable prognostic predictor in melanoma and has great potential for application in personalized treatment.
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Affiliation(s)
- Le-Bin Song
- Department of Dermatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Qi-Jie Zhang
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Xiao-Yuan Hou
- Department of Dermatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Yan-Yan Xiu
- Department of Dermatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Lin Chen
- Department of Dermatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Ning-Hong Song
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Yan Lu
- Department of Dermatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
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23
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Liu W, Luo B. The impact of EBV on the epigenetics of gastric carcinoma. Future Virol 2020. [DOI: 10.2217/fvl-2019-0148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
EBV is an important human tumor virus and is closely related to the occurrence of a variety of tumors, involving 10% of gastric cancer. In EBV-associated gastric carcinoma (EBVaGC), EBV expresses restrict viral genes including EBV nuclear antigen 1, EBV encoded small RNAs, Bam HI-A rightward transcripts, latent membrane protein 2A and miRNAs. The role of EBV in gastric carcinogenesis has received increasing attention and is considered to be another pathogenic factor in addition to Helicobacter pylori. A typical characteristic of EBVaGC is the extensive methylation of viral and host genome. Combined with other epigenetic mechanisms, EBV infection acts as an epigenetic driver of EBVaGC oncogenesis. In this review we discuss recent findings of EBV effect on host epigenetic alterations in EBVaGC and its role in oncogenic process.
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Affiliation(s)
- Wen Liu
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, Qingdao, PR China
| | - Bing Luo
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, Qingdao, PR China
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24
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Jing JJ, Li H, Wang ZY, Zhou H, Sun LP, Yuan Y. Aberrantly methylated-differentially expressed genes and pathways in Epstein-Barr virus-associated gastric cancer. Future Oncol 2020; 16:187-197. [PMID: 31989840 DOI: 10.2217/fon-2019-0649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Aim: To identify the methylated-differentially expressed genes (MDEGs) that may serve as diagnostic markers and therapeutic targets in Epstein-Barr virus-associated gastric cancer (EBVaGC) and to explore the methylation-based pathways for elucidating biological mechanisms of EBVaGC. Materials & methods: Gene expression and methylation profiles were downloaded from GEO database. MDEGs were identified by GEO2R. Pathway enrichment analyses were conducted based on DAVID database. Hub genes were identified by Cytoscape, which were further verified by The Cancer Genome Atlas database. Results: A total of 367 hypermethylated, lowly expressed genes were enriched in specific patterns of cell differentiation. 31 hypomethylated, highly expressed genes demonstrated enrichment in regulation of immune system process. After validation using The Cancer Genome Atlas database, seven genes were confirmed to be significantly different hub genes in EBVaGC. Conclusion: EBVaGC-specific MDEGs and pathways can be served as potential biomarkers for precise diagnosis and treatment of EBVaGC and provide novel insights into the mechanisms involved.
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Affiliation(s)
- Jing-Jing Jing
- Tumor Etiology & Screening Department of Cancer Institute & General Surgery, the First Hospital of China Medical University, Shenyang 110001, PR China.,Key Laboratory of Cancer Etiology & Prevention in Liaoning Education Department, the First Hospital of China Medical University, Shenyang 110001, PR China.,Key Laboratory of GI Cancer Etiology & Prevention in Liaoning Province, the First Hospital of China Medical University, Shenyang 110001, PR China
| | - Hao Li
- Tumor Etiology & Screening Department of Cancer Institute & General Surgery, the First Hospital of China Medical University, Shenyang 110001, PR China.,Key Laboratory of Cancer Etiology & Prevention in Liaoning Education Department, the First Hospital of China Medical University, Shenyang 110001, PR China.,Key Laboratory of GI Cancer Etiology & Prevention in Liaoning Province, the First Hospital of China Medical University, Shenyang 110001, PR China
| | - Ze-Yang Wang
- Tumor Etiology & Screening Department of Cancer Institute & General Surgery, the First Hospital of China Medical University, Shenyang 110001, PR China.,Key Laboratory of Cancer Etiology & Prevention in Liaoning Education Department, the First Hospital of China Medical University, Shenyang 110001, PR China.,Key Laboratory of GI Cancer Etiology & Prevention in Liaoning Province, the First Hospital of China Medical University, Shenyang 110001, PR China
| | - Heng Zhou
- Department of Anesthesiology, the First Hospital of China Medical University, Shenyang 110001, PR China
| | - Li-Ping Sun
- Tumor Etiology & Screening Department of Cancer Institute & General Surgery, the First Hospital of China Medical University, Shenyang 110001, PR China.,Key Laboratory of Cancer Etiology & Prevention in Liaoning Education Department, the First Hospital of China Medical University, Shenyang 110001, PR China.,Key Laboratory of GI Cancer Etiology & Prevention in Liaoning Province, the First Hospital of China Medical University, Shenyang 110001, PR China
| | - Yuan Yuan
- Tumor Etiology & Screening Department of Cancer Institute & General Surgery, the First Hospital of China Medical University, Shenyang 110001, PR China.,Key Laboratory of Cancer Etiology & Prevention in Liaoning Education Department, the First Hospital of China Medical University, Shenyang 110001, PR China.,Key Laboratory of GI Cancer Etiology & Prevention in Liaoning Province, the First Hospital of China Medical University, Shenyang 110001, PR China
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25
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Wikenius E, Moe V, Smith L, Heiervang ER, Berglund A. DNA methylation changes in infants between 6 and 52 weeks. Sci Rep 2019; 9:17587. [PMID: 31772264 PMCID: PMC6879561 DOI: 10.1038/s41598-019-54355-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 11/14/2019] [Indexed: 12/16/2022] Open
Abstract
Infants undergo extensive developments during their first year of life. Although the biological mechanisms involved are not yet fully understood, changes in the DNA methylation in mammals are believed to play a key role. This study was designed to investigate changes in infant DNA methylation that occurs between 6 and 52 weeks. A total of 214 infant saliva samples from 6 or 52 weeks were assessed using principal component analyses and t-distributed stochastic neighbor-embedding algorithms. Between the two time points, there were clear differences in DNA methylation. To further investigate these findings, paired two-sided student’s t-tests were performed. Differently methylated regions were defined as at least two consecutive probes that showed significant differences, with a q-value < 0.01 and a mean difference > 0.2. After correcting for false discovery rates, changes in the DNA methylation levels were found in 42 genes. Of these, 36 genes showed increased and six decreased DNA methylation. The overall DNA methylation changes indicated decreased gene expression. This was surprising because infants undergo such profound developments during their first year of life. The results were evaluated by taking into consideration the extensive development that occurs during pregnancy. During the first year of life, infants have an overall three-fold increase in weight, while the fetus develops from a single cell into a viable infant in 9 months, with an 875-million-fold increase in weight. It is possible that the findings represent a biological slowing mechanism in response to extensive fetal development. In conclusion, our study provides evidence of DNA methylation changes during the first year of life, representing a possible biological slowing mechanism. We encourage future studies of DNA methylation changes in infants to replicate the findings by using a repeated measures model and less stringent criteria to see if the same genes can be found, as well as investigating whether other genes are involved in development during this period.
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Affiliation(s)
- Ellen Wikenius
- H. Lee Moffitt Cancer Center & Research Institute, Tampa, Florida, USA. .,Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway.
| | - Vibeke Moe
- Department of Psychology, Faculty of Social Sciences, University of Oslo, Oslo, Norway.,The Center for Child and Adolescent Mental Health, Eastern and Southern Norway (RBUP), Oslo, Norway
| | - Lars Smith
- Department of Psychology, Faculty of Social Sciences, University of Oslo, Oslo, Norway
| | - Einar R Heiervang
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway.,Oslo University Hospital, Oslo, Norway
| | - Anders Berglund
- H. Lee Moffitt Cancer Center & Research Institute, Tampa, Florida, USA
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26
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Yin X, Huang S, Xu A, Fan F, Chen L, Sun C, Hu Y. Identification of distinctive long noncoding RNA competitive interactions and a six-methylated-gene prognostic signature in acute myeloid leukemia with -5/del(5q) or -7/del(7q). J Cell Biochem 2019; 121:1563-1574. [PMID: 31535409 DOI: 10.1002/jcb.29391] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Accepted: 08/28/2019] [Indexed: 12/11/2022]
Abstract
BACKGROUND Acute myeloid leukemia (AML) with -5/del(5q) or -7/del(7q) has special clinical and biological characteristics, but its molecular mechanisms and risk stratification remain unknown. METHODS The RNA sequencing and DNA methylation of 23 patients with -5/del(5q) or -7/del(7q) and 128 patients with other subtypes of acute myeloid leukemia were obtained from The Cancer Genome Atlas (TCGA). The regulatory mechanisms of competitive endogenous RNA (ceRNA) network and DNA methylation on gene expression were explored. To find robust and specific risk stratification for this AML subtype, a prognostic model was established and evaluated through four independent data sets. RESULTS We identified 966 differentially expressed long noncoding RNA, 2274 differentially expressed genes, and 47 differentially expressed microRNAs, and constructed a ceRNA network. After the integrated analysis of differentially methylated and expressed genes, 19 genes showed the opposite trend between the methylation variation and gene expression. An six-methylated-gene prognostic signature which highly correlated with overall survival was established, and the performance was validated by leave-one-out cross validation method and permutation test. Furthermore, the excellent prognostic value of this model was supported by an independent cohort, while specificity of this model was validated by three independent data sets, suggesting it as a predictive classifier with high efficiency for distinguishing those with -5/del(5q) or -7/del(7q) from other AML subtypes. CONCLUSIONS The ceRNA network may provide new ideas for the diagnosis and treatment for patients with -5/del(5q) or -7/del(7q).The six-methylated-gene prognostic signature was a robust, specific, and clinically practical risk stratification for the outcome of patients with AML having -5/del(5q) or -7/del(7q).
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Affiliation(s)
- Xuejiao Yin
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Sui Huang
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Aoshuang Xu
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Fengjuan Fan
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lei Chen
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chunyan Sun
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Collaborative Innovation Center of Hematology, Huazhong University of Science and Technology, Wuhan, China
| | - Yu Hu
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Collaborative Innovation Center of Hematology, Huazhong University of Science and Technology, Wuhan, China
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27
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Pes GM, Errigo A, Soro S, Longo NP, Dore MP. Glucose-6-phosphate dehydrogenase deficiency reduces susceptibility to cancer of endodermal origin. Acta Oncol 2019; 58:1205-1211. [PMID: 31109224 DOI: 10.1080/0284186x.2019.1616815] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background: Glucose-6-phosphate dehydrogenase (G6PD) deficiency is the most common inherited enzyme defect worldwide. There is a growing scientific evidence for a protective role of G6PD deficiency against carcinogenesis. In this retrospective analysis, we tested the hypothesis that G6PD deficiency may reduce the risk of developing cancer in a tissue-specific manner. Material and methods: The study was conducted using data from 11,708 subjects undergoing gastrointestinal endoscopic procedures between 2002 and 2018 and tested for G6PD status in a teaching hospital of Northern Sardinia, Italy. Results: A 40% reduction of risk for cancer of endodermal origin was observed among G6PD-deficient patients compared with subjects with normal enzyme activity (relative risk (RR) 0.61, 95% confidence interval (CI) 0.47-0.80) in both genders, confirmed by multivariable generalized linear regression after adjusting for age, sex, smoking habits, body mass index, diabetes and socio-economic status. The 'protective' effect of G6PD deficiency was larger for gastric cancer (RR 0.41, 95% CI 0.18-0.99), hepatocellular carcinoma (RR 0.48, 95% CI 0.26-0.92) and colorectal cancer (RR 0.72, 95% CI 0.53-0.98), while a non-significant risk was observed for breast, prostate, lung, hematopoietic and metastases (primary site unknown). Conclusions: Our results suggest a reduced susceptibility to develop cancers, mostly of endodermal origin (stomach, colon and liver), but not of ectodermal/mesodermal origin, in carriers of G6PD deficiency. The effects of G6PD deficiency on carcinogenesis need further studies to better understand how cancer cells originating from different germ layers use pentose phosphate pathway to proliferate.
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Affiliation(s)
- Giovanni Mario Pes
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, Sassari, Italy
| | - Alessandra Errigo
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, Sassari, Italy
| | - Sara Soro
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, Sassari, Italy
| | - Nunzio Pio Longo
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, Sassari, Italy
| | - Maria Pina Dore
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, Sassari, Italy
- Department of Medicine, Baylor College of Medicine, Houston, TX, USA
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28
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Bartlett AH, Liang JW, Sandoval-Sierra JV, Fowke JH, Simonsick EM, Johnson KC, Mozhui K. Longitudinal study of leukocyte DNA methylation and biomarkers for cancer risk in older adults. Biomark Res 2019; 7:10. [PMID: 31149338 PMCID: PMC6537435 DOI: 10.1186/s40364-019-0161-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 04/29/2019] [Indexed: 12/14/2022] Open
Abstract
Background Changes in DNA methylation over the course of life may provide an indicator of risk for cancer. We explored longitudinal changes in CpG methylation from blood leukocytes, and likelihood of future cancer diagnosis. Methods Peripheral blood samples were obtained at baseline and at follow-up visit from 20 participants in the Health, Aging and Body Composition prospective cohort study. Genome-wide CpG methylation was assayed using the Illumina Infinium Human MethylationEPIC (HM850K) microarray. Results Global patterns in DNA methylation from CpG-based analyses showed extensive changes in cell composition over time in participants who developed cancer. By visit year 6, the proportion of CD8+ T-cells decreased (p-value = 0.02), while granulocytes cell levels increased (p-value = 0.04) among participants diagnosed with cancer compared to those who remained cancer-free (cancer-free vs. cancer-present: 0.03 ± 0.02 vs. 0.003 ± 0.005 for CD8+ T-cells; 0.52 ± 0.14 vs. 0.66 ± 0.09 for granulocytes). Epigenome-wide analysis identified three CpGs with suggestive p-values ≤10− 5 for differential methylation between cancer-free and cancer-present groups, including a CpG located in MTA3, a gene linked with metastasis. At a lenient statistical threshold (p-value ≤3 × 10− 5), the top 10 cancer-associated CpGs included a site near RPTOR that is involved in the mTOR pathway, and the candidate tumor suppressor genes REC8, KCNQ1, and ZSWIM5. However, only the CpG in RPTOR (cg08129331) was replicated in an independent data set. Analysis of within-individual change from baseline to Year 6 found significant correlations between the rates of change in methylation in RPTOR, REC8 and ZSWIM5, and time to cancer diagnosis. Conclusion The results show that changes in cellular composition explains much of the cross-sectional and longitudinal variation in CpG methylation. Additionally, differential methylation and longitudinal dynamics at specific CpGs could provide powerful indicators of cancer development and/or progression. In particular, we highlight CpG methylation in the RPTOR gene as a potential biomarker of cancer that awaits further validation. Electronic supplementary material The online version of this article (10.1186/s40364-019-0161-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Alexandra H Bartlett
- 1Department of Preventive Medicine, University of Tennessee Health Science Center, Memphis, TN USA
| | - Jane W Liang
- 1Department of Preventive Medicine, University of Tennessee Health Science Center, Memphis, TN USA
| | | | - Jay H Fowke
- 1Department of Preventive Medicine, University of Tennessee Health Science Center, Memphis, TN USA
| | - Eleanor M Simonsick
- 2Intramural Research Program, National Institute on Aging, Baltimore, MD USA
| | - Karen C Johnson
- 1Department of Preventive Medicine, University of Tennessee Health Science Center, Memphis, TN USA
| | - Khyobeni Mozhui
- 1Department of Preventive Medicine, University of Tennessee Health Science Center, Memphis, TN USA
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29
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Feichtinger J, McFarlane RJ. Meiotic gene activation in somatic and germ cell tumours. Andrology 2019; 7:415-427. [PMID: 31102330 PMCID: PMC6766858 DOI: 10.1111/andr.12628] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 03/26/2019] [Accepted: 03/27/2019] [Indexed: 12/20/2022]
Abstract
Background Germ cell tumours are uniquely associated with the gametogenic tissues of males and females. A feature of these cancers is that they can express genes that are normally tightly restricted to meiotic cells. This aberrant gene expression has been used as an indicator that these cancer cells are attempting a programmed germ line event, meiotic entry. However, work in non‐germ cell cancers has also indicated that meiotic genes can become aberrantly activated in a wide range of cancer types and indeed provide functions that serve as oncogenic drivers. Here, we review the activation of meiotic factors in cancers and explore commonalities between meiotic gene activation in germ cell and non‐germ cell cancers. Objectives The objectives of this review are to highlight key questions relating to meiotic gene activation in germ cell tumours and to offer possible interpretations as to the biological relevance in this unique cancer type. Materials and Methods PubMed and the GEPIA database were searched for papers in English and for cancer gene expression data, respectively. Results We provide a brief overview of meiotic progression, with a focus on the unique mechanisms of reductional chromosome segregation in meiosis I. We then offer detailed insight into the role of meiotic chromosome regulators in non‐germ cell cancers and extend this to provide an overview of how this might relate to germ cell tumours. Conclusions We propose that meiotic gene activation in germ cell tumours might not indicate an unscheduled attempt to enter a full meiotic programme. Rather, it might simply reflect either aberrant activation of a subset of meiotic genes, with little or no biological relevance, or aberrant activation of a subset of meiotic genes as positive tumour evolutionary/oncogenic drivers. These postulates provide the provocation for further studies in this emerging field.
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Affiliation(s)
- J Feichtinger
- Division of Cell Biology, Histology and Embryology, Gottfried Schatz Research Center for Cell Signaling, Metabolism and Aging, Medical University of Graz, Graz, Austria.,OMICS Center Graz, BioTechMed Graz, Graz, Austria
| | - R J McFarlane
- North West Cancer Research Institute, School of Medical Sciences, Bangor University, Bangor, Gwynedd, UK
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30
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Lopes JL, Chaudhry S, Lopes GS, Levin NK, Tainsky MA. FANCM, RAD1, CHEK1 and TP53I3 act as BRCA-like tumor suppressors and are mutated in hereditary ovarian cancer. Cancer Genet 2019; 235-236:57-64. [PMID: 31078449 DOI: 10.1016/j.cancergen.2019.04.061] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 03/27/2019] [Accepted: 04/18/2019] [Indexed: 11/29/2022]
Abstract
Although 25% of ovarian cancer cases are due to inherited factors, most of the genetic risk remains unexplained. We previously identified candidate genes through germline whole exome sequencing of BRCA1/BRCA2 negative ovarian cancer patients with familial risk. Here, we performed functional assessment to determine whether they act as BRCA-like tumor suppressors. Seven candidate risk genes were targeted by siRNA for mRNA depletion followed by functional assays for clonogenic survival, cytotoxicity to DNA damaging agents, and involvement in homologous recombination repair. BRCA1 and BRCA1 were targeted as standards for loss of function outcome. Knockdown of various candidate genes led to tumor suppressor phenotypes also observed in BRCA1/BRCA2 deficient cells. Deficiency of CHEK1, FANCM and TP53I3 led to reduced homologous recombination repair efficiency. Knockdown of RAD1, CHEK1 or FANCM led to a decrease in cellular viability and cells deficient in CHEK1, RAD1 or TP53I3 displayed increased sensitivity to cisplatin. Functional studies of candidate genes identified by whole exome sequencing complements bioinformatics techniques and aid the implication of novel risk loci. The results of this study suggest that genes found mutated in hereditary ovarian cancer, FANCM, RAD1, CHEK1 and TP53I3, act as BRCA-like tumor suppressors.
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Affiliation(s)
- Jaime L Lopes
- Center for Molecular Medicine and Genetics and Department of Oncology, Wayne State University School of Medicine, 421 E. Canfield Street, Suite 3126, Detroit, MI 48201, USA; Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Sophia Chaudhry
- Center for Molecular Medicine and Genetics and Department of Oncology, Wayne State University School of Medicine, 421 E. Canfield Street, Suite 3126, Detroit, MI 48201, USA
| | - Guilherme S Lopes
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Nancy K Levin
- Center for Molecular Medicine and Genetics and Department of Oncology, Wayne State University School of Medicine, 421 E. Canfield Street, Suite 3126, Detroit, MI 48201, USA
| | - Michael A Tainsky
- Center for Molecular Medicine and Genetics and Department of Oncology, Wayne State University School of Medicine, 421 E. Canfield Street, Suite 3126, Detroit, MI 48201, USA.
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31
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Gao J, Zhao C, Liu Q, Hou X, Li S, Xing X, Yang C, Luo Y. Cyclin G2 suppresses Wnt/β-catenin signaling and inhibits gastric cancer cell growth and migration through Dapper1. J Exp Clin Cancer Res 2018; 37:317. [PMID: 30547803 PMCID: PMC6295076 DOI: 10.1186/s13046-018-0973-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 11/21/2018] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Gastric cancer is one of the most common malignant tumors. Cyclin G2 has been shown to be associated with the development of multiple types of tumors, but its underlying mechanisms in gastric tumors is not well-understood. The aim of this study is to investigate the role and the underlying mechanisms of cyclin G2 on Wnt/β-catenin signaling in gastric cancer. METHODS Real-time PCR, immunohistochemistry and in silico assay were used to determine the expression of cyclin G2 in gastric cancer. TCGA datasets were used to evaluate the association between cyclin G2 expression and the prognostic landscape of gastric cancers. The effects of ectopic and endogenous cyclin G2 on the proliferation and migration of gastric cancer cells were assessed using the MTS assay, colony formation assay, cell cycle assay, wound healing assay and transwell assay. Moreover, a xenograft model and a metastasis model of nude mice was used to determine the influence of cyclin G2 on gastric tumor growth and migration in vivo. The effects of cyclin G2 expression on Wnt/β-catenin signaling were explored using a TOPFlash luciferase reporter assay, and the molecular mechanisms involved were investigated using immunoblots assay, yeast two-hybrid screening, immunoprecipitation and Duolink in situ PLA. Ccng2-/- mice were generated to further confirm the inhibitory effect of cyclin G2 on Wnt/β-catenin signaling in vivo. Furthermore, GSK-3β inhibitors were utilized to explore the role of Wnt/β-catenin signaling in the suppression effect of cyclin G2 on gastric cancer cell proliferation and migration. RESULTS We found that cyclin G2 levels were decreased in gastric cancer tissues and were associated with tumor size, migration and poor differentiation status. Moreover, overexpression of cyclin G2 attenuated tumor growth and metastasis both in vitro and in vivo. Dpr1 was identified as a cyclin G2-interacting protein which was required for the cyclin G2-mediated inhibition of β-catenin expression. Mechanically, cyclin G2 impacted the activity of CKI to phosphorylate Dpr1, which has been proved to be a protein that acts as a suppressor of Wnt/β-catenin signaling when unphosphorylated. Furthermore, GSK-3β inhibitors abolished the cyclin G2-induced suppression of cell proliferation and migration. CONCLUSIONS This study demonstrates that cyclin G2 suppresses Wnt/β-catenin signaling and inhibits gastric cancer cell growth and migration through Dapper1.
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Affiliation(s)
- Jinlan Gao
- The Research Center for Medical Genomics, School of Life Sciences, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province 110122 People’s Republic of China
| | - Chenyang Zhao
- The Research Center for Medical Genomics, School of Life Sciences, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province 110122 People’s Republic of China
| | - Qi Liu
- The Research Center for Medical Genomics, School of Life Sciences, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province 110122 People’s Republic of China
| | - Xiaoyu Hou
- The Research Center for Medical Genomics, School of Life Sciences, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province 110122 People’s Republic of China
| | - Sen Li
- The Research Center for Medical Genomics, School of Life Sciences, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province 110122 People’s Republic of China
| | - Xuesha Xing
- The Research Center for Medical Genomics, School of Life Sciences, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province 110122 People’s Republic of China
| | - Chunhua Yang
- The Research Center for Medical Genomics, School of Life Sciences, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province 110122 People’s Republic of China
| | - Yang Luo
- The Research Center for Medical Genomics, School of Life Sciences, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province 110122 People’s Republic of China
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32
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Sutherland JH, Holloman WK. Loss of Cohesin Subunit Rec8 Switches Rad51 Mediator Dependence in Resistance to Formaldehyde Toxicity in Ustilago maydis. Genetics 2018; 210:559-572. [PMID: 30082279 PMCID: PMC6216591 DOI: 10.1534/genetics.118.301439] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 08/03/2018] [Indexed: 01/08/2023] Open
Abstract
DNA-protein cross-links (DPCs) are frequently occurring lesions that provoke continual threats to the integrity of the genome by interference with replication and transcription. Reactive aldehydes generated from endogenous metabolic processes or produced in the environment are sources that trigger cross-linking of DNA with associated proteins. DNA repair pathways in place for removing DPCs, or for bypassing them to enable completion of replication, include homologous recombination (HR) and replication fork remodeling (FR) systems. Here, we surveyed a set of mutants defective in known HR and FR components to determine their contribution toward maintaining resistance to chronic formaldehyde (FA) exposure in Ustilago maydis, a fungus that relies on the BRCA2-family member Brh2 as the principal Rad51 mediator in repair of DNA strand breaks. We found that, in addition to Brh2, Rad52 was also vital for resistance to FA. Deleting the gene for Rec8, a kleisin subunit of cohesin, eliminated the requirement for Brh2, but not Rad52, in FA resistance. The Rad51K133R mutant variant that is able to bind DNA but unable to dissociate from it was able to support resistance to FA. These findings suggest a model for DPC repair and tolerance that features a specialized role for Rad52, enabling Rad51 to access DNA in its noncanonical capacity of replication fork protection rather than DNA strand transfer.
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Affiliation(s)
- Jeanette H Sutherland
- Department of Microbiology and Immunology, Weill Cornell Medical College, New York, New York 10065
| | - William K Holloman
- Department of Microbiology and Immunology, Weill Cornell Medical College, New York, New York 10065
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33
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Pandey S, Jha HC, Shukla SK, Shirley MK, Robertson ES. Epigenetic Regulation of Tumor Suppressors by Helicobacter pylori Enhances EBV-Induced Proliferation of Gastric Epithelial Cells. mBio 2018; 9:e00649-18. [PMID: 29691341 PMCID: PMC5915740 DOI: 10.1128/mbio.00649-18] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 03/27/2018] [Indexed: 12/11/2022] Open
Abstract
Helicobacter pylori and Epstein-Barr virus (EBV) are two well-known contributors to cancer and can establish lifelong persistent infection in the host. This leads to chronic inflammation, which also contributes to development of cancer. Association with H. pylori increases the risk of gastric carcinoma, and coexistence with EBV enhances proliferation of infected cells. Further, H. pylori-EBV coinfection causes chronic inflammation in pediatric patients. We have established an H. pylori-EBV coinfection model system using human gastric epithelial cells. We showed that H. pylori infection can increase the oncogenic phenotype of EBV-infected cells and that the cytotoxin-associated gene (CagA) protein encoded by H. pylori stimulated EBV-mediated cell proliferation in this coinfection model system. This led to increased expression of DNA methyl transferases (DNMTs), which reprogrammed cellular transcriptional profiles, including those of tumor suppressor genes (TSGs), through hypermethylation. These findings provide new insights into a molecular mechanism whereby cooperativity between two oncogenic agents leads to enhanced oncogenic activity of gastric cancer cells.IMPORTANCE We have studied the cooperativity between H. pylori and EBV, two known oncogenic agents. This led to an enhanced oncogenic phenotype in gastric epithelial cells. We now demonstrate that EBV-driven epigenetic modifications are enhanced in the presence of H. pylori, more specifically, in the presence of its CagA secretory antigen. This results in increased proliferation of the infected gastric cells. Our findings now elucidate a molecular mechanism whereby expression of cellular DNA methyl transferases is induced influencing infection by EBV. Hypermethylation of the regulatory genomic regions of tumor suppressor genes results in their silencing. This drastically affects the expression of cell cycle, apoptosis, and DNA repair genes, which dysregulates their associated processes, and promotion of the oncogenic phenotype.
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Affiliation(s)
- Saurabh Pandey
- Departments of Otorhinolaryngology-Head and Neck Surgery, and Microbiology, the Tumor Virology Program, Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Hem Chandra Jha
- Departments of Otorhinolaryngology-Head and Neck Surgery, and Microbiology, the Tumor Virology Program, Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Sanket Kumar Shukla
- Departments of Otorhinolaryngology-Head and Neck Surgery, and Microbiology, the Tumor Virology Program, Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Meghan K Shirley
- Departments of Otorhinolaryngology-Head and Neck Surgery, and Microbiology, the Tumor Virology Program, Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Erle S Robertson
- Departments of Otorhinolaryngology-Head and Neck Surgery, and Microbiology, the Tumor Virology Program, Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
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Chen L, Zhang W, Li DY, Wang X, Tao Y, Zhang Y, Dong C, Zhao J, Zhang L, Zhang X, Guo J, Zhang X, Liao Q. Regulatory network analysis of LINC00472, a long noncoding RNA downregulated by DNA hypermethylation in colorectal cancer. Clin Genet 2018; 93:1189-1198. [PMID: 29488624 DOI: 10.1111/cge.13245] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 02/21/2018] [Accepted: 02/25/2018] [Indexed: 12/30/2022]
Abstract
Colorectal cancer (CRC), one of the common malignant cancers in the world, is caused by accumulated alterations of genetic and epigenetic factors over a long period of time. Along with that protein-coding genes being identified as oncogenes or tumor suppressors in CRC, a number of lncRNAs have also been found to be associated with CRC. Considering the important regulatory role of lncRNAs, the first goal of this study was to identify CRC-associated lncRNAs from a public database. One such lncRNA, LINC00472, was verified to be downregulated in CRC cell lines and cancer tissues compared with adjacent tissues. In addition, the down-regulation of LINC00472 seemed to be caused by DNA hypermethylation at its promoter region. Furthermore, the expression of LINC00472 and DNA methylation of promoter were significantly correlated with clinicopathological features. And DNA hypermethylation of LINC00472 may serve as a better diagnostic biomarker than its expression for CRC. Finally, we predicted the functions of LINC00472 and constructed a regulatory network and found LINC00472 may be involved in cell cycle and cell proliferation processes. Our results may provide a clue to further research into the function and regulatory mechanism of LINC00472 in CRC.
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Affiliation(s)
- L Chen
- Department of Biochemistry and Molecular Biology, Zhejiang Provincial Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, Zhejiang, China
| | - W Zhang
- Department of Medical Image, Sun Yat-Sen University Cancer Center, Guangzhou, China
| | - D Y Li
- Division of Cardiology, Department of Medicine, Columbia University Medical Center, New York, New York
| | - X Wang
- Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - Y Tao
- Zhejiang Provincial Key Laboratory of Pathological and Physiological Technology, Department of Preventative Medicine, School of Medicine, Ningbo University, Ningbo, Zhejiang, China
| | - Y Zhang
- Zhejiang Provincial Key Laboratory of Pathological and Physiological Technology, Department of Preventative Medicine, School of Medicine, Ningbo University, Ningbo, Zhejiang, China
| | - C Dong
- Zhejiang Provincial Key Laboratory of Pathological and Physiological Technology, Department of Preventative Medicine, School of Medicine, Ningbo University, Ningbo, Zhejiang, China
| | - J Zhao
- Zhejiang Provincial Key Laboratory of Pathological and Physiological Technology, Department of Preventative Medicine, School of Medicine, Ningbo University, Ningbo, Zhejiang, China
| | - L Zhang
- Zhejiang Provincial Key Laboratory of Pathological and Physiological Technology, Department of Preventative Medicine, School of Medicine, Ningbo University, Ningbo, Zhejiang, China
| | - X Zhang
- Zhejiang Provincial Key Laboratory of Pathological and Physiological Technology, Department of Preventative Medicine, School of Medicine, Ningbo University, Ningbo, Zhejiang, China
| | - J Guo
- Department of Biochemistry and Molecular Biology, Zhejiang Provincial Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, Zhejiang, China
| | - X Zhang
- Department of Gastroenterology, The Affiliated Hospital of Ningbo University School of Medicine, Ningbo, China
| | - Q Liao
- Zhejiang Provincial Key Laboratory of Pathological and Physiological Technology, Department of Preventative Medicine, School of Medicine, Ningbo University, Ningbo, Zhejiang, China
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35
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Zhao J, Geng L, Duan G, Xu W, Cheng Y, Huang Z, Zhou Z, Gong S. REC8 inhibits EMT by downregulating EGR1 in gastric cancer cells. Oncol Rep 2018; 39:1583-1590. [PMID: 29393474 PMCID: PMC5868373 DOI: 10.3892/or.2018.6244] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 12/07/2017] [Indexed: 12/11/2022] Open
Abstract
REC8 is a component of the meiotic cohesion complex that plays a critical role in chromosome dynamics during meiosis. However, the functional role of REC8 in gastric cancer has not been elucidated. In the present study, REC8 suppressed the growth and metastasis of gastric cancer cells in vitro. Whole Human Genome Oligo Microarray results revealed that a wide range of genes with broad function were targeted by REC8. Among them early growth response-1 (EGR1), a transcription factor and an epithelial-mesenchymal transition (EMT)-associated protein in the AGR-RAGE pathway was significantly downregulated when REC8 was overexpressed in gastric cancer cells. We hypothesized that REC8 inhibits EMT by downregulating EGR1 in gastric cancer cells. Consistent with our prediction, REC8 overexpression decreased EMT in gastric cancer cells, whereas the REC8 ablation reversed these effects. In addition, the phenotypes of EGR1 overexpressed cells were similar to the phenotypes of REC8 ablated cells. Furthermore, we determined that REC8 interacted with EGR1, and inhibited EMT in gastric cancer cells. We thus propose further studies of the pathways associated with REC8 and EGR1 to potentially find novel targets in the treatment for gastric cancer.
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Affiliation(s)
- Junhong Zhao
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Lanlan Geng
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Gaoyang Duan
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Wanfu Xu
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Yang Cheng
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Zhiliang Huang
- Cancer Center of Guangzhou Medical University, Guangzhou, Guangdong 510089, P.R. China
| | - Zhenwen Zhou
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Sitang Gong
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
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PinX1 Is a Potential Prognostic Factor for Non-Small-Cell Lung Cancer and Inhibits Cell Proliferation and Migration. BIOMED RESEARCH INTERNATIONAL 2017; 2017:7956437. [PMID: 28815183 PMCID: PMC5549499 DOI: 10.1155/2017/7956437] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2017] [Accepted: 05/04/2017] [Indexed: 12/23/2022]
Abstract
PinX1 has been identified as a suppressor of telomerase enzymatic activity. However, the tumour-suppressive roles of PinX1 in different types of human cancers are unclear. PinX1 expression status and its correlation with clinicopathological features in non-small-cell lung cancer (NSCLC) have not been investigated. Accordingly, in this study, we aimed to evaluate the roles of PinX1 in NSCLC. PinX1 expression status was examined by immunohistochemistry using tissue microarray from a total of 158 patients. Correlations among PinX1 expression, clinicopathological variables, and patient survival were analysed. Furthermore, we overexpressed PinX1 in NSCLC cells and tested telomerase activity using real-time quantitative telomeric repeat amplification protocol (qTRAP) assays. Proliferation and migration of NSCLC cells were examined using the MTS method, wound healing assays, and transwell assays, respectively. Our results showed that negative PinX1 expression was associated with a poor prognosis in NSCLC. Sex, smoking status, lymph gland status, subcarinal lymph node status, pathological stage, and PinX1 expression were related to survival. PinX1 was not an independent prognostic factor in NSCLC. PinX1 overexpression inhibited proliferation and migration in NSCLC cells by suppressing telomerase activity. Our findings suggested that PinX1 could be a potential tumour suppressor in NSCLC and that loss of PinX1 promoted NSCLC progression.
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37
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Okabe A, Funata S, Matsusaka K, Namba H, Fukuyo M, Rahmutulla B, Oshima M, Iwama A, Fukayama M, Kaneda A. Regulation of tumour related genes by dynamic epigenetic alteration at enhancer regions in gastric epithelial cells infected by Epstein-Barr virus. Sci Rep 2017; 7:7924. [PMID: 28801683 PMCID: PMC5554293 DOI: 10.1038/s41598-017-08370-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 07/11/2017] [Indexed: 12/29/2022] Open
Abstract
Epstein-Barr virus (EBV) infection is associated with tumours such as Burkitt lymphoma, nasopharyngeal carcinoma, and gastric cancer. We previously showed that EBV(+) gastric cancer presents an extremely high-methylation epigenotype and this aberrant DNA methylation causes silencing of multiple tumour suppressor genes. However, the mechanisms that drive EBV infection-mediated tumorigenesis, including other epigenomic alteration, remain unclear. We analysed epigenetic alterations induced by EBV infection especially at enhancer regions, to elucidate their contribution to tumorigenesis. We performed ChIP sequencing on H3K4me3, H3K4me1, H3K27ac, H3K27me3, and H3K9me3 in gastric epithelial cells infected or not with EBV. We showed that repressive marks were redistributed after EBV infection, resulting in aberrant enhancer activation and repression. Enhancer dysfunction led to the activation of pathways related to cancer hallmarks (e.g., resisting cell death, disrupting cellular energetics, inducing invasion, evading growth suppressors, sustaining proliferative signalling, angiogenesis, and tumour-promoting inflammation) and inactivation of tumour suppressive pathways. Deregulation of cancer-related genes in EBV-infected gastric epithelial cells was also observed in clinical EBV(+) gastric cancer specimens. Our analysis showed that epigenetic alteration associated with EBV-infection may contribute to tumorigenesis through enhancer activation and repression.
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Affiliation(s)
- Atsushi Okabe
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Sayaka Funata
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Keisuke Matsusaka
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Hiroe Namba
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Masaki Fukuyo
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Bahityar Rahmutulla
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Motohiko Oshima
- Department of Cellular and Molecular Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Atsushi Iwama
- Department of Cellular and Molecular Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Masashi Fukayama
- Department of Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Atsushi Kaneda
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan.
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38
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Nishikawa J, Iizasa H, Yoshiyama H, Nakamura M, Saito M, Sasaki S, Shimokuri K, Yanagihara M, Sakai K, Suehiro Y, Yamasaki T, Sakaida I. The Role of Epigenetic Regulation in Epstein-Barr Virus-Associated Gastric Cancer. Int J Mol Sci 2017; 18:ijms18081606. [PMID: 28757548 PMCID: PMC5577998 DOI: 10.3390/ijms18081606] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 07/19/2017] [Accepted: 07/22/2017] [Indexed: 02/07/2023] Open
Abstract
The Epstein–Barr virus (EBV) is detected in about 10% of gastric carcinoma cases throughout the world. In EBV-associated gastric carcinoma (EBVaGC), all tumor cells harbor the clonal EBV genome. The expression of latent EBV genes is strictly regulated through the methylation of EBV DNA. The methylation of viral DNA regulates the type of EBV latency, and methylation of the tumor suppressor genes is a key abnormality in EBVaGC. The methylation frequencies of several tumor suppressor genes and cell adhesion molecules are significantly higher in EBVaGC than in control cases. EBV-derived microRNAs repress translation from viral and host mRNAs. EBV regulates the expression of non-coding RNA in gastric carcinoma. With regard to the clinical application of demethylating agents against EBVaGC, we investigated the effects of decitabine against the EBVaGC cell lines. Decitabine inhibited the cell growth of EBVaGC cells. The promoter regions of p73 and Runt-related transcription factor 3(RUNX3) were demethylated, and their expression was upregulated by the treatment. We review the role of epigenetic regulation in the development and maintenance of EBVaGC and discuss the therapeutic application of DNA demethylating agents for EBVaGC.
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MESH Headings
- Antimetabolites, Antineoplastic/pharmacology
- Antimetabolites, Antineoplastic/therapeutic use
- Azacitidine/analogs & derivatives
- Azacitidine/pharmacology
- Azacitidine/therapeutic use
- Core Binding Factor Alpha 3 Subunit/genetics
- CpG Islands/drug effects
- DNA Methylation/drug effects
- DNA, Viral/genetics
- Decitabine
- Epigenesis, Genetic/drug effects
- Epstein-Barr Virus Infections/drug therapy
- Epstein-Barr Virus Infections/genetics
- Epstein-Barr Virus Infections/virology
- Gene Expression Regulation, Neoplastic/drug effects
- Gene Expression Regulation, Viral/drug effects
- Herpesvirus 4, Human/drug effects
- Herpesvirus 4, Human/genetics
- Herpesvirus 4, Human/pathogenicity
- Humans
- MicroRNAs/genetics
- RNA, Viral/genetics
- Stomach Neoplasms/drug therapy
- Stomach Neoplasms/genetics
- Stomach Neoplasms/virology
- Tumor Protein p73/genetics
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Affiliation(s)
- Jun Nishikawa
- Department of Laboratory Science, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan.
| | - Hisashi Iizasa
- Department of Microbiology, Shimane University Faculty of Medicine, 89-1 Enyacho, Izumo City, Shimane 693-8501, Japan.
| | - Hironori Yoshiyama
- Department of Microbiology, Shimane University Faculty of Medicine, 89-1 Enyacho, Izumo City, Shimane 693-8501, Japan.
| | - Munetaka Nakamura
- Department of Gastroenterology and Hepatology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan.
| | - Mari Saito
- Department of Gastroenterology and Hepatology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan.
| | - Sho Sasaki
- Department of Gastroenterology and Hepatology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan.
| | - Kanami Shimokuri
- Department of Laboratory Science, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan.
| | - Masashi Yanagihara
- Department of Laboratory Science, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan.
| | - Kouhei Sakai
- Department of Oncology and Laboratory Medicine, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan.
| | - Yutaka Suehiro
- Department of Oncology and Laboratory Medicine, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan.
| | - Takahiro Yamasaki
- Department of Oncology and Laboratory Medicine, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan.
| | - Isao Sakaida
- Department of Gastroenterology and Hepatology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan.
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