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Csergeová L, Krbušek D, Janoštiak R. CIP/KIP and INK4 families as hostages of oncogenic signaling. Cell Div 2024; 19:11. [PMID: 38561743 PMCID: PMC10985988 DOI: 10.1186/s13008-024-00115-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 03/25/2024] [Indexed: 04/04/2024] Open
Abstract
CIP/KIP and INK4 families of Cyclin-dependent kinase inhibitors (CKIs) are well-established cell cycle regulatory proteins whose canonical function is binding to Cyclin-CDK complexes and altering their function. Initial experiments showed that these proteins negatively regulate cell cycle progression and thus are tumor suppressors in the context of molecular oncology. However, expanded research into the functions of these proteins showed that most of them have non-canonical functions, both cell cycle-dependent and independent, and can even act as tumor enhancers depending on their posttranslational modifications, subcellular localization, and cell state context. This review aims to provide an overview of canonical as well as non-canonical functions of CIP/KIP and INK4 families of CKIs, discuss the potential avenues to promote their tumor suppressor functions instead of tumor enhancing ones, and how they could be utilized to design improved treatment regimens for cancer patients.
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Affiliation(s)
- Lucia Csergeová
- BIOCEV-First Faculty of Medicine, Charles University, Prague, Czechia
| | - David Krbušek
- BIOCEV-First Faculty of Medicine, Charles University, Prague, Czechia
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2
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INK4 cyclin-dependent kinase inhibitors as potential prognostic biomarkers and therapeutic targets in hepatocellular carcinoma. Biosci Rep 2022; 42:231524. [PMID: 35771229 PMCID: PMC9284345 DOI: 10.1042/bsr20221082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/26/2022] [Accepted: 06/28/2022] [Indexed: 11/17/2022] Open
Abstract
The INK4 family is an important family of cyclin-dependent kinase inhibitors (CDKIs) and consists of CDKN2A, CDKN2B, CDKN2, and CDKN2D. Abnormal expression of CDKN2A has been reported in hepatocellular carcinoma (HCC) and is associated with the prognosis of patients and infiltration of immune cells. However, there is a lack of systematic research on the roles of the other INK4 family members in the diagnosis, prognosis, and immune regulation of HCC. Using online public databases and clinical samples, we comprehensively analyzed the INK4 family in HCC. All four INK4 proteins were overexpressed in HCC and correlated with advanced cancer stage and poor prognosis. INK4 expression accurately distinguished tumor from normal tissue, particularly CDKN2A and CDKN2C. The INK4 family participated in cell-cycle regulation and the DNA damage repair pathway, which inhibited genotoxic-induced apoptosis in tumorigenesis. INK4 proteins were positively correlated with the infiltration of immune cells (B cells, CD8+ T cells, CD4+ T cells, macrophages, neutrophils, and dendritic cells) and immune checkpoints (CTLA-4, PD1, and PD-L1). CDKN2D had the highest correlation (correlation coefficient >0.3) with all the above-mentioned infiltrating immune cells and immune checkpoints, indicating that it may be useful as an immunotherapy target. The INK4 family was valuable for diagnosis and predicting the prognosis of HCC and participated in the occurrence, progression, and immune regulation of HCC, demonstrating its potential as a diagnostic and prognostic biomarker and therapeutic target in HCC.
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3
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Li YR, Fu M, Song YQ, Li SL, Ge XY. Long noncoding RNA MRPL23-AS1 suppresses anoikis in salivary adenoid cystic carcinoma in vitro. Oral Dis 2022; 29:1588-1601. [PMID: 35175670 DOI: 10.1111/odi.14156] [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: 05/03/2021] [Revised: 09/18/2021] [Accepted: 10/19/2021] [Indexed: 11/27/2022]
Abstract
Distant lung metastasis is the main factor that affects the survival rate of patients with salivary adenoid cystic carcinoma (SACC). Anoikis resistance is a feature of tumor cells that easily metastasize. The long non-coding RNA (lncRNA) MRPL23 antisense RNA 1 (MPRL23-AS1) is related to lung metastasis in SACC, but its role in anoikis resistance is unknown.After altering MPRL23-AS1 expression in SACC cells, anoikis resistance was detected by calcein AM/PI staining and annexin V/PI flow cytometry. The apoptosis marker activated caspase-3 and the bcl-2/bax ratio were detected by Western blotting. The relationship between MPRL23-AS1 and the promoter of the potential downstream target gene p19INK4D was identified by chromatin immunoprecipitation (ChIP)-PCR assay. p19INK4D expression in patient tissues was determined using qRT-PCR and immunohistochemistry.The functional experiments showed that MPRL23-AS1 could promote anoikis resistance in vitro. MRPL23-AS1 recruited the EZH2 to the promoter region of p19INK4D, inhibited p19INK4D expression, and promoted tumor cell anoikis resistance. p19INK4D overexpression did not affect anoikis in attached cells; however, it attenuated the anoikis resistance effect of MPRL23-AS1 in suspension cells. p19INK4D expression was significantly lower in SACC tissues than in normal tissues.The novel MRPL23-AS1/p19INK4D axis may be a potential SACC biomarker or therapeutic target.
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Affiliation(s)
- Yin-Ran Li
- Central Laboratory, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry of Health & NMPA Key Laboratory for Dental Material.,Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, 100081, P.R. China
| | - Min Fu
- Central Laboratory, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry of Health & NMPA Key Laboratory for Dental Material.,Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, 100081, P.R. China
| | - Ye-Qing Song
- Central Laboratory, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry of Health & NMPA Key Laboratory for Dental Material
| | - Sheng-Lin Li
- Central Laboratory, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry of Health & NMPA Key Laboratory for Dental Material.,Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, 100081, P.R. China
| | - Xi-Yuan Ge
- Central Laboratory, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry of Health & NMPA Key Laboratory for Dental Material.,Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, 100081, P.R. China
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Amani J, Gorjizadeh N, Younesi S, Najafi M, Ashrafi AM, Irian S, Gorjizadeh N, Azizian K. Cyclin-dependent kinase inhibitors (CDKIs) and the DNA damage response: The link between signaling pathways and cancer. DNA Repair (Amst) 2021; 102:103103. [PMID: 33812232 DOI: 10.1016/j.dnarep.2021.103103] [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: 12/31/2020] [Accepted: 03/16/2021] [Indexed: 02/08/2023]
Abstract
At the cellular level, DNA repair mechanisms are crucial in maintaining both genomic integrity and stability. DNA damage appears to be a central culprit in tumor onset and progression. Cyclin-dependent kinases (CDKs) and their regulatory partners coordinate the cell cycle progression. Aberrant CDK activity has been linked to a variety of cancers through deregulation of cell-cycle control. Besides DNA damaging agents and chromosome instability (CIN), disruptions in the levels of cell cycle regulators including cyclin-dependent kinase inhibitors (CDKIs) would result in unscheduled proliferation and cell division. The INK4 and Cip/Kip (CDK interacting protein/kinase inhibitor protein) family of CDKI proteins are involved in cell cycle regulation, transcription regulation, apoptosis, and cell migration. A thorough understanding of how these CDKIs regulate the DNA damage response through multiple signaling pathways may provide an opportunity to design efficient treatment strategies to inhibit carcinogenesis.
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Affiliation(s)
- Jafar Amani
- Applied Microbiology Research Center, System Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Nassim Gorjizadeh
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - Simin Younesi
- School of Health and Biomedical Sciences, RMIT University, Melbourne, Vic., Australia
| | - Mojtaba Najafi
- Department of Genetics, Faculty of Animal Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Golestan, Iran
| | - Arash M Ashrafi
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - Saeed Irian
- Department of Cell and Molecular Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran
| | - Negar Gorjizadeh
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran; Department of Cell and Molecular Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran.
| | - Khalil Azizian
- Department of Clinical Microbiology, Sirjan School of Medical Sciences, Sirjan, Iran.
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5
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Han X, Kuang Y, Chen H, Liu T, Zhang J, Liu J. p19INK4d: More than Just a Cyclin-Dependent Kinase Inhibitor. Curr Drug Targets 2021; 21:96-102. [PMID: 31400265 DOI: 10.2174/1389450120666190809161901] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 07/11/2019] [Accepted: 07/17/2019] [Indexed: 12/28/2022]
Abstract
Cyclin-dependent kinase inhibitors (CDKIs) are important cell cycle regulators. The CDKI family is composed of the INK4 family and the CIP/KIP family. p19INK4d belongs to the INK4 gene family and is involved in a series of normal physiological activities and the pathogenesis of diseases. Many factors play regulatory roles in the p19INK4d gene expression at the transcriptional and posttranscriptional levels. p19INK4d not only regulates the cell cycle but also plays regulatory roles in apoptosis, DNA damage repair, cell differentiation of hematopoietic cells, and cellular senescence. In this review, the regulatory network of the p19INK4d gene expression and its biological functions are summarized, which provides a basis for further study of p19INK4d as a drug target for disease treatment.
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Affiliation(s)
- Xu Han
- Molecular Biology Research Center and the Center for Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Yijin Kuang
- Molecular Biology Research Center and the Center for Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Huiyong Chen
- Molecular Biology Research Center and the Center for Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Ting Liu
- Department of Rheumatology, the First Affiliated Hospital of South China University, Hengyang, Hunan, China
| | - Ji Zhang
- Department of Rheumatology, the First Affiliated Hospital of South China University, Hengyang, Hunan, China
| | - Jing Liu
- Molecular Biology Research Center and the Center for Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan, China
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6
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Kuang Y, Han X, Cao P, Xiong D, Peng Y, Liu Z, Xu Z, Liang L, Roy M, Liu J, Nie L, Zhang J. p19 INK4d inhibits proliferation and enhances imatinib efficacy through BCR-ABL signaling pathway in chronic myeloid leukemia. Blood Cells Mol Dis 2020; 85:102477. [PMID: 32711219 DOI: 10.1016/j.bcmd.2020.102477] [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: 06/16/2020] [Revised: 07/08/2020] [Accepted: 07/10/2020] [Indexed: 11/28/2022]
Abstract
Chronic myeloid leukemia (CML) is a kind of myeloproliferative disorder caused by a constitutively active BCR-ABL tyrosine kinase. Tyrosine kinase inhibitors (TKIs), imatinib and its derivatives, have achieved great progress in the treatment of CML. However, many CML patients do not respond to TKIs alone. p19INK4d, a cyclin-dependent kinase inhibitor, plays important roles in proliferation, DNA damage repair, apoptosis and cell differentiation, but its role in CML is unknown. Herein, we found that the expression of p19INK4d in CML patients was significantly lower than that in healthy controls. p19INK4d overexpression inhibits cell proliferation through cell cycle arrest, and cooperates with imatinib to inhibit CML more effectively in vitro and in vivo. Mechanistically, p19INK4d decreased the expression of BCR-ABL and its downstream molecules p-Mek1/2, moreover, the expression of Gli-1, c-myc, MUC1, Shh and TC48 also reduced significantly. Collectively, p19INK4d inhibits proliferation and enhances imatinib efficacy in the treatment of CML. These findings maybe have implications for developing potential targets to increase imatinib sensitivity for CML.
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Affiliation(s)
- Yijin Kuang
- Molecular Biology Research Center & Center for Medical Genetics, School of Life Sciences, Central South University, Changsha 410078, China; School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou 510515, China
| | - Xu Han
- Molecular Biology Research Center & Center for Medical Genetics, School of Life Sciences, Central South University, Changsha 410078, China
| | - Pengfei Cao
- Department of Hematology, Xiangya Hospital, Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha 410008, China
| | - Dehui Xiong
- Molecular Biology Research Center & Center for Medical Genetics, School of Life Sciences, Central South University, Changsha 410078, China
| | - Yuanliang Peng
- Molecular Biology Research Center & Center for Medical Genetics, School of Life Sciences, Central South University, Changsha 410078, China
| | - Zhaoping Liu
- Department of Clinical Laboratory, The First Affiliated Hospital of South China University, Hengyang 421000, China
| | - Zhenru Xu
- Department of Clinical Laboratory, The First Affiliated Hospital of South China University, Hengyang 421000, China
| | - Long Liang
- Molecular Biology Research Center & Center for Medical Genetics, School of Life Sciences, Central South University, Changsha 410078, China; Molecular Science and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Mridul Roy
- Molecular Biology Research Center & Center for Medical Genetics, School of Life Sciences, Central South University, Changsha 410078, China; Molecular Science and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Jing Liu
- Molecular Biology Research Center & Center for Medical Genetics, School of Life Sciences, Central South University, Changsha 410078, China; Erythropoiesis Research Center, Central South University, Changsha 410078, China
| | - Ling Nie
- Department of Hematology, Xiangya Hospital, Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha 410008, China.
| | - Ji Zhang
- Department of Clinical Laboratory, The First Affiliated Hospital of South China University, Hengyang 421000, China.
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7
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Zhong L, Liao G, Wang X, Li L, Zhang J, Chen Y, Liu J, Liu S, Wei L, Zhang W, Lu Y. Mesenchymal stem cells-microvesicle-miR-451a ameliorate early diabetic kidney injury by negative regulation of P15 and P19. Exp Biol Med (Maywood) 2019; 243:1233-1242. [PMID: 30614256 DOI: 10.1177/1535370218819726] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Microvesicles (MVs) from mesenchymal stem cells (MSCs) have been reported as a new communicated way between cells. This study evaluated the influence and underlying mechanism of MVs-shuttled miR-451a on renal fibrosis and epithelial mesenchymal transformation (EMT) in diabetic nephropathy (DN) with hyperuricemia. MVs were isolated from MSCs-cultured medium by gradient ultracentrifugation. The level of miR-451a in MSCs and MVs was analyzed by qPCR. The changes of miR-451a, E-cadherin, α-SMA, P15INK4b (P15), and P19INK4d (P19) were measured in hyperglycosis and hyperuricemia-induced cell (HK-2) and mouse models. The changes of cell cycle were analyzed by flow cytometry. The ability of proliferation and viability was measured by BrdU and CCK8, respectively. Dual-luciferase reporter assays were conducted to determine the target binding sites. The renal function and histological changes of mice were analyzed. MVs showed the same surface markers as MSCs but much higher miR-451a expression (4.87 ± 2.03 fold higher than MSCs). miR-451a was decreased to 26% ± 11% and 6.7% ± 0.82% in injured HK-2 cells and kidney, respectively. MV-miR-451a enhanced the HK2 cells proliferation and viability in vitro, and decreased the morphologic and functional injury of kidney in vivo. Moreover, infusion of MV-miR-451a reduced the level of α-SMA and raised E-cadherin expression. These effects were responsible for the improved arrested cell cycle and down-regulation of P15 and P19 via miR-451a targeting their 3′-UTR sites. This study demonstrated that MSC–MV-miR-451a could inhibit cell cycle inhibitors P15 and P19 to restart the blocked cell cycle and reverse EMT in vivo and in vitro, and thus miR-451a is potentially a new target for DN therapy. Impact statement The mechanism of MSCs repairing the injured kidney in diabetic nephropathy is not yet clear. In the research, MVs showed the same surface markers as MSCs but much higher MiR-451a expression. miR-451a was decreased in both injured HK-2 cells and kidneys. MV-miR-451a stimulated the cell proliferation and viability in vitro and promoted structural and functional improvements of injured kidney in vivo. Infusion of MV-miR-451a ameliorated EMT by reducing α-SMA and increasing E-cadherin. These effects relied on the improved cell cycle arrest and the down-regulation of P15 and P19 via miR-451a binding to their 3′-UTR region. This study demonstrated that MSC–MV-miR-451a could specifically inhibit cell cycle inhibitors to restart the blocked cell cycle and reverse EMT in vivo and in vitro. Therefore, miR-451a may be a new target for DN therapy.
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Affiliation(s)
- Ling Zhong
- Key Lab of Transplant Engineering and Immunology, NHFPC, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China.,Department of Clinical and Experimental Medicine, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan 610072, China
| | - Guangneng Liao
- Key Lab of Transplant Engineering and Immunology, NHFPC, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Xiaojiao Wang
- Key Lab of Transplant Engineering and Immunology, NHFPC, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Lan Li
- Key Lab of Transplant Engineering and Immunology, NHFPC, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Jie Zhang
- Key Lab of Transplant Engineering and Immunology, NHFPC, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Younan Chen
- Key Lab of Transplant Engineering and Immunology, NHFPC, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Jingping Liu
- Key Lab of Transplant Engineering and Immunology, NHFPC, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Shuyun Liu
- Key Lab of Transplant Engineering and Immunology, NHFPC, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Lingling Wei
- Institute of Organ Transplantation, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan 610072, China
| | - Wengeng Zhang
- Precision Medicine Key Laboratory of Sichuan Province & Precision Medicine Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yanrong Lu
- Key Lab of Transplant Engineering and Immunology, NHFPC, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
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Gasri-Plotnitsky L, Ovadia A, Shamalov K, Nizri-Megnaji T, Meir S, Zurer I, Cohen CJ, Ginsberg D. A novel lncRNA, GASL1, inhibits cell proliferation and restricts E2F1 activity. Oncotarget 2017; 8:23775-23786. [PMID: 28423601 PMCID: PMC5410343 DOI: 10.18632/oncotarget.15864] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 02/10/2017] [Indexed: 01/23/2023] Open
Abstract
The human genome encodes thousands of unique long non-coding RNAs (lncRNAs), many of which are emerging as critical regulators of cell fate. However, their functions as well as their transcriptional regulation are only partially understood. The E2F1 transcription factor induces both proliferation and apoptosis, and is a critical downstream target of the tumor suppressor, RB. Here, we provide evidence that a novel lncRNA named GASL1 is transcriptionally regulated by E2F1; GASL1 levels are elevated upon activation of exogenous E2F1 or endogenous E2Fs. Inhibition of GASL1 expression induced cell cycle progression, and in particular, G1 exit. Moreover, GASL1 silencing enhanced cell proliferation, while, conversely, its ectopic expression inhibited proliferation. Knockdown of GASL1 also enhanced E2F1-induced apoptosis, suggesting the existence of an E2F/GASL1 negative feedback loop. In agreement with this notion, silencing of GASL1 led to increased levels of phosphorylated pRB and loss of Rb impaired the effect of GASL1 silencing on G1 exit. Importantly, xenograft experiments demonstrated that GASL1 deletion enhances tumor growth. Moreover, low levels of GASL1 are associated with decreased survival of liver cancer patients. Taken together, our data identify GASL1 as a novel lncRNA regulator of cell cycle progression and cell proliferation with a potential role in cancer.
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Affiliation(s)
- Lital Gasri-Plotnitsky
- The Mina and Everard Goodman Faculty of Life Science, Bar Ilan University, Ramat Gan 52900, Israel
| | - Aviv Ovadia
- The Mina and Everard Goodman Faculty of Life Science, Bar Ilan University, Ramat Gan 52900, Israel
| | - Katerina Shamalov
- The Mina and Everard Goodman Faculty of Life Science, Bar Ilan University, Ramat Gan 52900, Israel
| | - Tali Nizri-Megnaji
- The Mina and Everard Goodman Faculty of Life Science, Bar Ilan University, Ramat Gan 52900, Israel
| | - Shimrit Meir
- The Mina and Everard Goodman Faculty of Life Science, Bar Ilan University, Ramat Gan 52900, Israel
| | - Irit Zurer
- The Mina and Everard Goodman Faculty of Life Science, Bar Ilan University, Ramat Gan 52900, Israel
| | - Cyrille J Cohen
- The Mina and Everard Goodman Faculty of Life Science, Bar Ilan University, Ramat Gan 52900, Israel
| | - Doron Ginsberg
- The Mina and Everard Goodman Faculty of Life Science, Bar Ilan University, Ramat Gan 52900, Israel
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Oxidative stress-induced CREB upregulation promotes DNA damage repair prior to neuronal cell death protection. Mol Cell Biochem 2016; 425:9-24. [PMID: 27816995 DOI: 10.1007/s11010-016-2858-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 10/22/2016] [Indexed: 01/23/2023]
Abstract
cAMP response element-binding (CREB) protein is a cellular transcription factor that mediates responses to different physiological and pathological signals. Using a model of human neuronal cells we demonstrate herein, that CREB is phosphorylated after oxidative stress induced by hydrogen peroxide. This phosphorylation is largely independent of PKA and of the canonical phosphoacceptor site at ser-133, and is accompanied by an upregulation of CREB expression at both mRNA and protein levels. In accordance with previous data, we show that CREB upregulation promotes cell survival and that its silencing results in an increment of apoptosis after oxidative stress. Interestingly, we also found that CREB promotes DNA repair after treatment with hydrogen peroxide. Using a cDNA microarray we found that CREB is responsible for the regulation of many genes involved in DNA repair and cell survival after oxidative injury. In summary, the neuroprotective effect mediated by CREB appears to follow three essential steps following oxidative injury. First, the upregulation of CREB expression that allows sufficient level of activated and phosphorylated protein is the primordial event that promotes the induction of genes of the DNA Damage Response. Then and when the DNA repair is effective, CREB induces detoxification and survival genes. This kinetics seems to be important to completely resolve oxidative-induced neuronal damages.
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E2F1 apoptosis counterattacked: evil strikes back. Trends Mol Med 2013; 19:89-98. [DOI: 10.1016/j.molmed.2012.10.009] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Revised: 10/23/2012] [Accepted: 10/23/2012] [Indexed: 12/15/2022]
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