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Wang L, Nuñez YZ, Kranzler HR, Zhou H, Gelernter J. Whole-exome sequencing study of opioid dependence offers novel insights into the contributions of exome variants. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.09.15.24313713. [PMID: 39371181 PMCID: PMC11451610 DOI: 10.1101/2024.09.15.24313713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/08/2024]
Abstract
Opioid dependence (OD) is epidemic in the United States and it is associated with a variety of adverse health effects. Its estimated heritability is ∼50%, and recent genome-wide association studies have identified more than a dozen common risk variants. However, there are no published studies of rare OD risk variants. In this study, we analyzed whole-exome sequencing data from the Yale-Penn cohort, comprising 2,100 participants of European ancestry (EUR; 1,321 OD cases) and 1,790 of African ancestry (AFR; 864 cases). A novel low-frequency variant (rs746301110) in the RUVBL2 gene was identified in EUR ( p =6.59×10 -10 ). Suggestive associations ( p <1×10 -5 ) were observed in TMCO3 in EUR, in NEIL2 and CFAP44 in AFR, and in FAM210B in the cross-ancestry meta-analysis. Gene-based collapsing tests identified SLC22A10 , TMCO3 , FAM90A1 , DHX58 , CHRND , GLDN , PLAT , H1-4 , COL3A1 , GPHB5 and QPCTL as top genes ( p <1×10 -4 ) with most associations attributable to rare variants and driven by the burden of predicted loss-of-function and missense variants. This study begins to fill the gap in our understanding of the genetic architecture of OD, providing insights into the contribution of rare coding variants and potential targets for future functional studies and drug development.
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Yi W, Dziadowicz SA, Mangano RS, Wang L, McBee J, Frisch SM, Hazlehurst LA, Adjeroh DA, Hu G. Molecular Signatures of CB-6644 Inhibition of the RUVBL1/2 Complex in Multiple Myeloma. Int J Mol Sci 2024; 25:9022. [PMID: 39201707 PMCID: PMC11354775 DOI: 10.3390/ijms25169022] [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: 07/18/2024] [Revised: 08/09/2024] [Accepted: 08/18/2024] [Indexed: 09/03/2024] Open
Abstract
Multiple myeloma is the second most hematological cancer. RUVBL1 and RUVBL2 form a subcomplex of many chromatin remodeling complexes implicated in cancer progression. As an inhibitor specific to the RUVBL1/2 complex, CB-6644 exhibits remarkable anti-tumor activity in xenograft models of Burkitt's lymphoma and multiple myeloma (MM). In this work, we defined transcriptional signatures corresponding to CB-6644 treatment in MM cells and determined underlying epigenetic changes in terms of chromatin accessibility. CB-6644 upregulated biological processes related to interferon response and downregulated those linked to cell proliferation in MM cells. Transcriptional regulator inference identified E2Fs as regulators for downregulated genes and MED1 and MYC as regulators for upregulated genes. CB-6644-induced changes in chromatin accessibility occurred mostly in non-promoter regions. Footprinting analysis identified transcription factors implied in modulating chromatin accessibility in response to CB-6644 treatment, including ATF4/CEBP and IRF4. Lastly, integrative analysis of transcription responses to various chemical compounds of the molecular signature genes from public gene expression data identified CB-5083, a p97 inhibitor, as a synergistic candidate with CB-6644 in MM cells, but experimental validation refuted this hypothesis.
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Affiliation(s)
- Weijun Yi
- Department of Microbiology, Immunology & Cell Biology, West Virginia University, Morgantown, WV 26505, USA; (W.Y.); (S.A.D.); (R.S.M.); (L.W.); (J.M.)
- Lane Department of Computer Science & Electrical Engineering, West Virginia University, Morgantown, WV 26506, USA
| | - Sebastian A. Dziadowicz
- Department of Microbiology, Immunology & Cell Biology, West Virginia University, Morgantown, WV 26505, USA; (W.Y.); (S.A.D.); (R.S.M.); (L.W.); (J.M.)
| | - Rachel S. Mangano
- Department of Microbiology, Immunology & Cell Biology, West Virginia University, Morgantown, WV 26505, USA; (W.Y.); (S.A.D.); (R.S.M.); (L.W.); (J.M.)
- Division of Clinical Pharmacology, Departments of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Lei Wang
- Department of Microbiology, Immunology & Cell Biology, West Virginia University, Morgantown, WV 26505, USA; (W.Y.); (S.A.D.); (R.S.M.); (L.W.); (J.M.)
| | - Joseph McBee
- Department of Microbiology, Immunology & Cell Biology, West Virginia University, Morgantown, WV 26505, USA; (W.Y.); (S.A.D.); (R.S.M.); (L.W.); (J.M.)
| | - Steven M. Frisch
- Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, WV 26506, USA;
| | - Lori A. Hazlehurst
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morganton, WV 26506, USA;
- WVU Cancer Institute, West Virginia University, Morgantown, WV 26506, USA
| | - Donald A. Adjeroh
- Lane Department of Computer Science & Electrical Engineering, West Virginia University, Morgantown, WV 26506, USA
| | - Gangqing Hu
- Department of Microbiology, Immunology & Cell Biology, West Virginia University, Morgantown, WV 26505, USA; (W.Y.); (S.A.D.); (R.S.M.); (L.W.); (J.M.)
- WVU Cancer Institute, West Virginia University, Morgantown, WV 26506, USA
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Graves D, Akkerman N, Fulham L, Helwer R, Pelka P. Molecular insights into type I interferon suppression and enhanced pathogenicity by species B human adenoviruses B7 and B14. mBio 2024; 15:e0103824. [PMID: 38940561 PMCID: PMC11323573 DOI: 10.1128/mbio.01038-24] [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: 04/05/2024] [Accepted: 05/22/2024] [Indexed: 06/29/2024] Open
Abstract
Human adenoviruses (HAdVs) are small DNA viruses that generally cause mild disease. Certain strains, particularly those belonging to species B HAdVs, can cause severe pneumonia and have a relatively high mortality rate. Little is known about the molecular aspects of how these highly pathogenic species affect the infected cell and how they suppress innate immunity. The present study provides molecular insights into how species B adenoviruses suppress the interferon signaling pathway. Our study shows that these viruses, unlike HAdV-C2, are resistant to type I interferon. This resistance likely arises due to the highly efficient suppression of interferon-stimulated gene expression. Unlike in HAdV-C2, HAdV-B7 and B14 sequester STAT2 and RNA polymerase II from interferon-stimulated gene promoters in infected cells. This results in suppressed interferon- stimulated gene activation. In addition, we show that RuvBL1 and RuvBL2, cofactors important for RNA polymerase II recruitment to promoters and interferon-stimulated gene activation, are redirected to the cytoplasm forming high molecular weight complexes that, likely, are unable to associate with chromatin. Proteomic analysis also identified key differences in the way these viruses affect the host cell, providing insights into species B-associated high pathogenicity. Curiously, we observed that at the level of protein expression changes to the infected cell, HAdV-C2 and B7 were more similar than those of the same species, B7 and B14. Collectively, our study represents the first such study of innate immune suppression by the highly pathogenic HAdV-B7 and B14, laying an important foundation for future investigations.IMPORTANCEHuman adenoviruses form a large family of double-stranded DNA viruses known for a variety of usually mild diseases. Certain strains of human adenovirus cause severe pneumonia leading to much higher mortality and morbidity than most other strains. The reasons for this enhanced pathogenicity are unknown. Our study provides a molecular investigation of how these highly pathogenic strains might inactivate the interferon signaling pathway, highlighting the lack of sensitivity of these viruses to type I interferon in general while providing a global picture of how viral changes in cellular proteins drive worse disease outcomes.
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Affiliation(s)
- Drayson Graves
- Department of Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Nikolas Akkerman
- Department of Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Lauren Fulham
- Department of Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Rafe Helwer
- Department of Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Peter Pelka
- Department of Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, Manitoba, Canada
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Lu C, Gao H, Li H, Luo N, Fan S, Li X, Deng R, He D, Zhao H. A novel LINC02321 promotes cell proliferation and decreases cisplatin sensitivity in bladder cancer by regulating RUVBL2. Transl Oncol 2024; 45:101962. [PMID: 38677015 PMCID: PMC11066559 DOI: 10.1016/j.tranon.2024.101962] [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: 04/09/2023] [Revised: 10/15/2023] [Accepted: 04/15/2024] [Indexed: 04/29/2024] Open
Abstract
Bladder cancer (BC) has a high incidence and is prone to recurrence. In most instances, the low 5-year survival rate of advanced BC patients results from postoperative recurrence and drug resistance. Long noncoding RNAs (lncRNAs) can participate in numerous biological functions by regulating the expression of genes to affect tumorigenesis. Our previous work had demonstrated that a novel lncRNA, LINC02321, was associated with BC prognosis. In this study, A high expression of LINC02321 was found in BC tissues, which was associated with poor prognosis in patients. LINC02321 promoted both proliferation and G1-G0 progression in BC cells, while also inhibited sensitivity to cisplatin. Mechanistically, LINC02321 can bind to RUVBL2 and regulate the expression levels of RUVBL2 protein by affecting its half-life. RUVBL2 is involved in the DNA damage response. The potential of DNA damage repair pathways to exert chemosensitization has been demonstrated in vivo. The rescue experiment demonstrated that RUVBL2 overexpression can markedly abolish the decreased cell proliferation and the increased sensitivity of BC cells to cisplatin caused by LINC02321 knockdown. The results indicate that LINC02321 functions as an oncogene in BC, and may serve as a novel potential target for controlling BC progression and addressing cisplatin resistance in BC therapy.
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Affiliation(s)
- Chuncheng Lu
- Department of Urology, The 1st Affiliated Hospital of Kunming Medical University, Kunming 650032, China; Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
| | - Hongbin Gao
- Department of Urology, The 1st Affiliated Hospital of Kunming Medical University, Kunming 650032, China; Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
| | - Haiyuan Li
- Department of Urology, The 1st Affiliated Hospital of Kunming Medical University, Kunming 650032, China; Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
| | - Ning Luo
- Department of Urology, The 1st Affiliated Hospital of Kunming Medical University, Kunming 650032, China; Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
| | - Shipeng Fan
- Department of Urology, The 1st Affiliated Hospital of Kunming Medical University, Kunming 650032, China; Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
| | - Xi Li
- Department of Urology, The 1st Affiliated Hospital of Kunming Medical University, Kunming 650032, China; Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
| | - Renbin Deng
- Department of Urology, The 1st Affiliated Hospital of Kunming Medical University, Kunming 650032, China; Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
| | - Danpeng He
- Department of Urology, The 1st Affiliated Hospital of Kunming Medical University, Kunming 650032, China; Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
| | - Hui Zhao
- Department of Urology, The 1st Affiliated Hospital of Kunming Medical University, Kunming 650032, China; Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China.
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Serra-Bardenys G, Blanco E, Escudero-Iriarte C, Serra-Camprubí Q, Querol J, Pascual-Reguant L, Morancho B, Escorihuela M, Tissera NS, Sabé A, Martín L, Segura-Bayona S, Verde G, Aiese Cigliano R, Millanes-Romero A, Jerónimo C, Cebrià-Costa JP, Nuciforo P, Simonetti S, Viaplana C, Dienstmann R, Oliveira M, Peg V, Stracker TH, Arribas J, Canals F, Villanueva J, Di Croce L, García de Herreros A, Tian TV, Peiró S. LOXL2-mediated chromatin compaction is required to maintain the oncogenic properties of triple-negative breast cancer cells. FEBS J 2024; 291:2423-2448. [PMID: 38451841 DOI: 10.1111/febs.17112] [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: 06/01/2023] [Revised: 01/02/2024] [Accepted: 02/23/2024] [Indexed: 03/09/2024]
Abstract
Oxidation of histone H3 at lysine 4 (H3K4ox) is catalyzed by lysyl oxidase homolog 2 (LOXL2). This histone modification is enriched in heterochromatin in triple-negative breast cancer (TNBC) cells and has been linked to the maintenance of compacted chromatin. However, the molecular mechanism underlying this maintenance is still unknown. Here, we show that LOXL2 interacts with RuvB-Like 1 (RUVBL1), RuvB-Like 2 (RUVBL2), Actin-like protein 6A (ACTL6A), and DNA methyltransferase 1associated protein 1 (DMAP1), a complex involved in the incorporation of the histone variant H2A.Z. Our experiments indicate that this interaction and the active form of RUVBL2 are required to maintain LOXL2-dependent chromatin compaction. Genome-wide experiments showed that H2A.Z, RUVBL2, and H3K4ox colocalize in heterochromatin regions. In the absence of LOXL2 or RUVBL2, global levels of the heterochromatin histone mark H3K9me3 were strongly reduced, and the ATAC-seq signal in the H3K9me3 regions was increased. Finally, we observed that the interplay between these series of events is required to maintain H3K4ox-enriched heterochromatin regions, which in turn is key for maintaining the oncogenic properties of the TNBC cell line tested (MDA-MB-231).
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Affiliation(s)
- Gemma Serra-Bardenys
- Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain
- Institut Bonanova FP Sanitaria, Consorci Mar Parc de Salut de Barcelona, Spain
| | - Enrique Blanco
- Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology, Spain
| | | | | | - Jessica Querol
- Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain
| | - Laura Pascual-Reguant
- Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology, Spain
| | | | | | | | - Anna Sabé
- Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain
| | - Luna Martín
- Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain
| | | | - Gaetano Verde
- Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain
| | | | - Alba Millanes-Romero
- Institute for Research in Biomedicine (IRB Barcelona) and Barcelona Institute of Science and Technology, Spain
| | - Celia Jerónimo
- Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology, Spain
- Institut de Recherches Cliniques de Montréal, Canada
| | | | - Paolo Nuciforo
- Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain
| | - Sara Simonetti
- Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain
| | | | | | - Mafalda Oliveira
- Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain
- Medical Oncology Department, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Vicente Peg
- Medical Oncology Department, Vall d'Hebron University Hospital, Barcelona, Spain
- Centro de Investigación Biomédica en Red en Oncología (CIBERONC), Barcelona, Spain
- Vall d'Hebron Research Institute (VHIR), Barcelona, Spain
- Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Travis H Stracker
- Radiation Oncology Branch, National Cancer Institute, Bethesda, MD, USA
| | - Joaquín Arribas
- Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain
- Vall d'Hebron Research Institute (VHIR), Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
- Programa de Recerca en Càncer, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain
| | - Francesc Canals
- Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain
| | | | - Luciano Di Croce
- Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - Antonio García de Herreros
- Programa de Recerca en Càncer, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain
- Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra, Barcelona, Spain
| | - Tian V Tian
- Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain
| | - Sandra Peiró
- Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain
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6
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Tian J, Wen M, Gao P, Feng M, Wei G. RUVBL1 ubiquitination by DTL promotes RUVBL1/2-β-catenin-mediated transcriptional regulation of NHEJ pathway and enhances radiation resistance in breast cancer. Cell Death Dis 2024; 15:259. [PMID: 38609375 PMCID: PMC11015013 DOI: 10.1038/s41419-024-06651-4] [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: 08/01/2023] [Revised: 02/04/2024] [Accepted: 04/05/2024] [Indexed: 04/14/2024]
Abstract
Radiotherapy effectiveness in breast cancer is limited by radioresistance. Nevertheless, the mechanisms behind radioresistance are not yet fully understood. RUVBL1 and RUVBL2, referred to as RUVBL1/2, are crucial AAA+ ATPases that act as co-chaperones and are connected to cancer. Our research revealed that RUVBL1, also known as pontin/TIP49, is excessively expressed in MMTV-PyMT mouse models undergoing radiotherapy, which is considered a murine spontaneous breast-tumor model. Our findings suggest that RUVBL1 enhances DNA damage repair and radioresistance in breast cancer cells both in vitro and in vivo. Mechanistically, we discovered that DTL, also known as CDT2 or DCAF2, which is a substrate adapter protein of CRL4, promotes the ubiquitination of RUVBL1 and facilitates its binding to RUVBL2 and transcription cofactor β-catenin. This interaction, in turn, attenuates its binding to acetyltransferase Tat-interacting protein 60 (TIP60), a comodulator of nuclear receptors. Subsequently, ubiquitinated RUVBL1 promotes the transcriptional regulation of RUVBL1/2-β-catenin on genes associated with the non-homologous end-joining (NHEJ) repair pathway. This process also attenuates TIP60-mediated H4K16 acetylation and the homologous recombination (HR) repair process. Expanding upon the prior study's discoveries, we exhibited that the ubiquitination of RUVBL1 by DTL advances the interosculation of RUVBL1/2-β-catenin. And, it then regulates the transcription of NHEJ repair pathway protein. Resulting in an elevated resistance of breast cancer cells to radiation therapy. From the aforementioned, it is evident that targeting DTL-RUVBL1/2-β-catenin provides a potential radiosensitization approach when treating breast cancer.
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Affiliation(s)
- Jie Tian
- Key Laboratory for Experimental Teratology of the Ministry of Education, Department of Cell Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Mingxin Wen
- Key Laboratory for Experimental Teratology of the Ministry of Education, Department of Human Anatomy, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Peng Gao
- Key Laboratory for Experimental Teratology of Ministry of Education, Department of Pathology, School of Basic Medical Sciences and Qilu Hospital, Shandong University, Jinan, Shandong, 250012, China
| | - Maoxiao Feng
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China.
| | - Guangwei Wei
- Key Laboratory for Experimental Teratology of the Ministry of Education, Department of Cell Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China.
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Luthuli SD, Shonhai A. The multi-faceted roles of R2TP complex span across regulation of gene expression, translation, and protein functional assembly. Biophys Rev 2023; 15:1951-1965. [PMID: 38192347 PMCID: PMC10771493 DOI: 10.1007/s12551-023-01127-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 08/27/2023] [Indexed: 01/10/2024] Open
Abstract
Macromolecular complexes play essential roles in various cellular processes. The assembly of macromolecular assemblies within the cell must overcome barriers imposed by a crowded cellular environment which is characterized by an estimated concentration of biological macromolecules amounting to 100-450 g/L that take up approximately 5-40% of the cytoplasmic volume. The formation of the macromolecular assemblies is facilitated by molecular chaperones in cooperation with their co-chaperones. The R2TP protein complex has emerged as a co-chaperone of Hsp90 that plays an important role in macromolecular assembly. The R2TP complex is composed of a heterodimer of RPAP3:P1H1DI that is in turn complexed to members of the ATPase associated with diverse cellular activities (AAA +), RUVBL1 and RUVBL2 (R1 and R2) families. What makes the R2TP co-chaperone complex particularly important is that it is involved in a wide variety of cellular processes including gene expression, translation, co-translational complex assembly, and posttranslational protein complex formation. The functional versatility of the R2TP co-chaperone complex makes it central to cellular development; hence, it is implicated in various human diseases. In addition, their roles in the development of infectious disease agents has become of interest. In the current review, we discuss the roles of these proteins as co-chaperones regulating Hsp90 and its partnership with Hsp70. Furthermore, we highlight the structure-function features of the individual proteins within the R2TP complex and describe their roles in various cellular processes.
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Affiliation(s)
- Sifiso Duncan Luthuli
- Department of Biochemistry and Microbiology, University of Venda, Thohoyandou, South Africa
| | - Addmore Shonhai
- Department of Biochemistry and Microbiology, University of Venda, Thohoyandou, South Africa
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8
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Li M, Yang L, Chan AKN, Pokharel SP, Liu Q, Mattson N, Xu X, Chang W, Miyashita K, Singh P, Zhang L, Li M, Wu J, Wang J, Chen B, Chan LN, Lee J, Zhang XH, Rosen ST, Müschen M, Qi J, Chen J, Hiom K, Bishop AJR, Chen C. Epigenetic Control of Translation Checkpoint and Tumor Progression via RUVBL1-EEF1A1 Axis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2206584. [PMID: 37075745 PMCID: PMC10265057 DOI: 10.1002/advs.202206584] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 02/23/2023] [Indexed: 05/03/2023]
Abstract
Epigenetic dysregulation is reported in multiple cancers including Ewing sarcoma (EwS). However, the epigenetic networks underlying the maintenance of oncogenic signaling and therapeutic response remain unclear. Using a series of epigenetics- and complex-focused CRISPR screens, RUVBL1, the ATPase component of NuA4 histone acetyltransferase complex, is identified to be essential for EwS tumor progression. Suppression of RUVBL1 leads to attenuated tumor growth, loss of histone H4 acetylation, and ablated MYC signaling. Mechanistically, RUVBL1 controls MYC chromatin binding and modulates the MYC-driven EEF1A1 expression and thus protein synthesis. High-density CRISPR gene body scan pinpoints the critical MYC interacting residue in RUVBL1. Finally, this study reveals the synergism between RUVBL1 suppression and pharmacological inhibition of MYC in EwS xenografts and patient-derived samples. These results indicate that the dynamic interplay between chromatin remodelers, oncogenic transcription factors, and protein translation machinery can provide novel opportunities for combination cancer therapy.
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Affiliation(s)
- Mingli Li
- Department of Systems BiologyBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
| | - Lu Yang
- Department of Systems BiologyBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
- Division of Epigenetic and Transcriptional EngineeringBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
| | - Anthony K. N. Chan
- Department of Systems BiologyBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
- Division of Epigenetic and Transcriptional EngineeringBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
| | - Sheela Pangeni Pokharel
- Department of Systems BiologyBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
- Division of Epigenetic and Transcriptional EngineeringBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
| | - Qiao Liu
- Department of Systems BiologyBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
| | - Nicole Mattson
- Department of Systems BiologyBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
| | - Xiaobao Xu
- Department of Systems BiologyBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
| | - Wen‐Han Chang
- Department of Systems BiologyBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
| | - Kazuya Miyashita
- Department of Systems BiologyBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
| | - Priyanka Singh
- Department of Systems BiologyBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
| | - Leisi Zhang
- Department of Systems BiologyBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
| | - Maggie Li
- Department of Systems BiologyBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
| | - Jun Wu
- City of Hope Comprehensive Cancer CenterDuarteCA91010USA
| | - Jinhui Wang
- City of Hope Comprehensive Cancer CenterDuarteCA91010USA
| | - Bryan Chen
- Department of Systems BiologyBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
| | - Lai N. Chan
- Center of Molecular and Cellular OncologyYale Cancer CenterYale School of MedicineNew HavenCT06510USA
- Department of Cancer BiologyLerner Research InstituteCleveland ClinicClevelandOH44195USA
| | - Jaewoong Lee
- Center of Molecular and Cellular OncologyYale Cancer CenterYale School of MedicineNew HavenCT06510USA
- School of Biosystems and Biomedical SciencesCollege of Health ScienceKorea UniversitySeoul02841South Korea
- Interdisciplinary Program in Precision Public HealthKorea UniversitySeoul02841South Korea
| | | | | | - Markus Müschen
- Center of Molecular and Cellular OncologyYale Cancer CenterYale School of MedicineNew HavenCT06510USA
| | - Jun Qi
- Department of Cancer BiologyDana‐Farber Cancer InstituteHarvard Medical SchoolBostonMA02215USA
| | - Jianjun Chen
- Department of Systems BiologyBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
- City of Hope Comprehensive Cancer CenterDuarteCA91010USA
| | - Kevin Hiom
- Division of Cellular MedicineSchool of MedicineUniversity of DundeeNethergateDundeeDD1 4HNUK
| | - Alexander J. R. Bishop
- Department of Cellular Systems and AnatomyUniversity of Texas Health Science Center at San AntonioSan AntonioTX78229USA
- Greehey Children's Cancer Research InstituteUniversity of Texas Health Science Center at San AntonioSan AntonioTX78229USA
| | - Chun‐Wei Chen
- Department of Systems BiologyBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
- Division of Epigenetic and Transcriptional EngineeringBeckman Research InstituteCity of Hope Comprehensive Cancer CenterDuarteCA91010USA
- City of Hope Comprehensive Cancer CenterDuarteCA91010USA
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9
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Yfantis A, Mylonis I, Chachami G, Nikolaidis M, Amoutzias GD, Paraskeva E, Simos G. Transcriptional Response to Hypoxia: The Role of HIF-1-Associated Co-Regulators. Cells 2023; 12:cells12050798. [PMID: 36899934 PMCID: PMC10001186 DOI: 10.3390/cells12050798] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 02/22/2023] [Accepted: 03/01/2023] [Indexed: 03/08/2023] Open
Abstract
The Hypoxia Inducible Factor 1 (HIF-1) plays a major role in the cellular response to hypoxia by regulating the expression of many genes involved in adaptive processes that allow cell survival under low oxygen conditions. Adaptation to the hypoxic tumor micro-environment is also critical for cancer cell proliferation and therefore HIF-1 is also considered a valid therapeutical target. Despite the huge progress in understanding regulation of HIF-1 expression and activity by oxygen levels or oncogenic pathways, the way HIF-1 interacts with chromatin and the transcriptional machinery in order to activate its target genes is still a matter of intense investigation. Recent studies have identified several different HIF-1- and chromatin-associated co-regulators that play important roles in the general transcriptional activity of HIF-1, independent of its expression levels, as well as in the selection of binding sites, promoters and target genes, which, however, often depends on cellular context. We review here these co-regulators and examine their effect on the expression of a compilation of well-characterized HIF-1 direct target genes in order to assess the range of their involvement in the transcriptional response to hypoxia. Delineating the mode and the significance of the interaction between HIF-1 and its associated co-regulators may offer new attractive and specific targets for anticancer therapy.
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Affiliation(s)
- Angelos Yfantis
- Laboratory of Biochemistry, Faculty of Medicine, University of Thessaly, BIOPOLIS, 41500 Larissa, Greece; (A.Y.); (I.M.); (G.C.)
| | - Ilias Mylonis
- Laboratory of Biochemistry, Faculty of Medicine, University of Thessaly, BIOPOLIS, 41500 Larissa, Greece; (A.Y.); (I.M.); (G.C.)
| | - Georgia Chachami
- Laboratory of Biochemistry, Faculty of Medicine, University of Thessaly, BIOPOLIS, 41500 Larissa, Greece; (A.Y.); (I.M.); (G.C.)
| | - Marios Nikolaidis
- Bioinformatics Laboratory, Department of Biochemistry and Biotechnology, University of Thessaly, BIOPOLIS, 41500 Larissa, Greece; (M.N.); (G.D.A.)
| | - Grigorios D. Amoutzias
- Bioinformatics Laboratory, Department of Biochemistry and Biotechnology, University of Thessaly, BIOPOLIS, 41500 Larissa, Greece; (M.N.); (G.D.A.)
| | - Efrosyni Paraskeva
- Laboratory of Physiology, Faculty of Medicine, University of Thessaly, BIOPOLIS, 41500 Larissa, Greece;
| | - George Simos
- Laboratory of Biochemistry, Faculty of Medicine, University of Thessaly, BIOPOLIS, 41500 Larissa, Greece; (A.Y.); (I.M.); (G.C.)
- Gerald Bronfman Department of Oncology, Faculty of Medicine, McGill University, Montreal, QC H4A 3T2, Canada
- Correspondence:
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10
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Khurana J, Shrivastava A, Singh A, Gupta A. Exploring potential of Plasmodium RUVBL proteins as anti-malarial drug target. J Biomol Struct Dyn 2023; 41:736-752. [PMID: 34877896 DOI: 10.1080/07391102.2021.2011418] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Although malaria related cases and deaths have consistently declined over time, growing resistance to existing anti-malarial drugs in Plasmodium remains a matter of extreme concern. Since we rely so heavily on use of chemotherapy for malaria treatment and knowing that all the available anti-malarial drug will become virtually useless in the near future, we have to increase our understanding of basic biology of the parasite as well as characterize new molecular targets that can be exploited for anti-malarial therapy. In the present study, PfRUVBLs (AAA family member proteins) were evaluated for their potential as novel anti-malarial drug target candidates, using computational approaches. Virtual High-throughput screening of various pharmacophore libraries obtained from three different databases (which included, Asinex, ZINC15 & PubChem) followed by extra precision docking, resulted in identification of relevant hit compounds that showed binding affinity with the active region of PfRUVBL1 protein. Based on molecular docking data, MD simulations, and protein-ligand interaction studies, combined with toxicity assessment & ADME profiling data, at least three best hits were eventually identified that could be novel potent inhibitors of PfRUVBL1 protein and can be further tested for anti-malarial activity using in vitro protocols. Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Juhi Khurana
- Epigenetics and Human Disease Laboratory, Department of Life Sciences, Shiv Nadar University, Greater Noida, India
| | - Ashish Shrivastava
- Bioinformatics Lab, Department of Life Sciences, Shiv Nadar University, Greater Noida, India
| | - Ashutosh Singh
- Bioinformatics Lab, Department of Life Sciences, Shiv Nadar University, Greater Noida, India
| | - Ashish Gupta
- Epigenetics and Human Disease Laboratory, Department of Life Sciences, Shiv Nadar University, Greater Noida, India
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11
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Gao G, Hausmann S, Flores NM, Benitez AM, Shen J, Yang X, Person MD, Gayatri S, Cheng D, Lu Y, Liu B, Mazur PK, Bedford MT. The NFIB/CARM1 partnership is a driver in preclinical models of small cell lung cancer. Nat Commun 2023; 14:363. [PMID: 36690626 PMCID: PMC9870865 DOI: 10.1038/s41467-023-35864-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 01/04/2023] [Indexed: 01/24/2023] Open
Abstract
The coactivator associated arginine methyltransferase (CARM1) promotes transcription, as its name implies. It does so by modifying histones and chromatin bound proteins. We identified nuclear factor I B (NFIB) as a CARM1 substrate and show that this transcription factor utilizes CARM1 as a coactivator. Biochemical studies reveal that tripartite motif 29 (TRIM29) is an effector molecule for methylated NFIB. Importantly, NFIB harbors both oncogenic and metastatic activities, and is often overexpressed in small cell lung cancer (SCLC). Here, we explore the possibility that CARM1 methylation of NFIB is important for its transforming activity. Using a SCLC mouse model, we show that both CARM1 and the CARM1 methylation site on NFIB are critical for the rapid onset of SCLC. Furthermore, CARM1 and methylated NFIB are responsible for maintaining similar open chromatin states in tumors. Together, these findings suggest that CARM1 might be a therapeutic target for SCLC.
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Affiliation(s)
- Guozhen Gao
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Simone Hausmann
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Natasha M Flores
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Ana Morales Benitez
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Jianjun Shen
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Xiaojie Yang
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Maria D Person
- Center for Biomedical Research Support, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Sitaram Gayatri
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
- Evozyne Inc., Chicago, IL, 60614, USA
| | - Donghang Cheng
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Yue Lu
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Bin Liu
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Pawel K Mazur
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.
| | - Mark T Bedford
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.
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12
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Wang H, Li B, Zuo L, Wang B, Yan Y, Tian K, Zhou R, Wang C, Chen X, Jiang Y, Zheng H, Qin F, Zhang B, Yu Y, Liu CP, Xu Y, Gao J, Qi Z, Deng W, Ji X. The transcriptional coactivator RUVBL2 regulates Pol II clustering with diverse transcription factors. Nat Commun 2022; 13:5703. [PMID: 36171202 PMCID: PMC9519968 DOI: 10.1038/s41467-022-33433-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 09/16/2022] [Indexed: 11/10/2022] Open
Abstract
RNA polymerase II (Pol II) apparatuses are compartmentalized into transcriptional clusters. Whether protein factors control these clusters remains unknown. In this study, we find that the ATPase-associated with diverse cellular activities (AAA + ) ATPase RUVBL2 co-occupies promoters with Pol II and various transcription factors. RUVBL2 interacts with unphosphorylated Pol II in chromatin to promote RPB1 carboxy-terminal domain (CTD) clustering and transcription initiation. Rapid depletion of RUVBL2 leads to a decrease in the number of Pol II clusters and inhibits nascent RNA synthesis, and tethering RUVBL2 to an active promoter enhances Pol II clustering at the promoter. We also identify target genes that are directly linked to the RUVBL2-Pol II axis. Many of these genes are hallmarks of cancers and encode proteins with diverse cellular functions. Our results demonstrate an emerging activity for RUVBL2 in regulating Pol II cluster formation in the nucleus.
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Affiliation(s)
- Hui Wang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
- Department of Pathogenic Biology, Chengdu Medical College, Chengdu, 610500, China
| | - Boyuan Li
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
| | - Linyu Zuo
- Center for Quantitative Biology, Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
| | - Bo Wang
- Biomedical Pioneering Innovation Center (BIOPIC), Academy for Advanced Interdisciplinary Studies, Beijing Advanced Innovation Center for Genomics (ICG), Peking-Tsinghua Center for Life Sciences (CLS), School of Life Sciences, Peking University, Beijing, 100871, China
| | - Yan Yan
- Institute for TCM-X; MOE Key Laboratory of Bioinformatics; Bioinformatics Division, BNRist (Beijing National Research Center for Information Science and Technology); Department of Automation, Tsinghua University, Beijing, 100084, China
- Center for Synthetic and Systems Biology, Tsinghua University, Beijing, 100084, China
| | - Kai Tian
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
| | - Rong Zhou
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
| | - Chenlu Wang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
| | - Xizi Chen
- Fudan University Shanghai Cancer Center, Institutes of Biomedical Sciences, Shanghai Medical College of Fudan University, Shanghai, 200032, China
| | - Yongpeng Jiang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
| | - Haonan Zheng
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
| | - Fangfei Qin
- Synthetic and Functional Biomolecules Center, Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Bin Zhang
- Departments of Pathology and Laboratory Medicine, and Pediatrics, University of Rochester Medical Center, 601 Elmwood Ave, Box 608, Rochester, NY, 14642, USA
| | - Yang Yu
- Key Laboratory of RNA Biology, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Chao-Pei Liu
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yanhui Xu
- Fudan University Shanghai Cancer Center, Institutes of Biomedical Sciences, Shanghai Medical College of Fudan University, Shanghai, 200032, China
| | - Juntao Gao
- Institute for TCM-X; MOE Key Laboratory of Bioinformatics; Bioinformatics Division, BNRist (Beijing National Research Center for Information Science and Technology); Department of Automation, Tsinghua University, Beijing, 100084, China
- Center for Synthetic and Systems Biology, Tsinghua University, Beijing, 100084, China
| | - Zhi Qi
- Center for Quantitative Biology, Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
| | - Wulan Deng
- Biomedical Pioneering Innovation Center (BIOPIC), Academy for Advanced Interdisciplinary Studies, Beijing Advanced Innovation Center for Genomics (ICG), Peking-Tsinghua Center for Life Sciences (CLS), School of Life Sciences, Peking University, Beijing, 100871, China
| | - Xiong Ji
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China.
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13
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Zhou X, Li X, Wang R, Hua D, Sun C, Yu L, Shi C, Luo W, Jiang Z, An W, Wang Q, Yu S. Recruitment of LEF1 by Pontin chromatin modifier amplifies TGFBR2 transcription and activates TGFβ/SMAD signalling during gliomagenesis. Cell Death Dis 2022; 13:818. [PMID: 36153326 PMCID: PMC9509381 DOI: 10.1038/s41419-022-05265-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 09/08/2022] [Accepted: 09/13/2022] [Indexed: 01/23/2023]
Abstract
Synergies of transcription factors, chromatin modifiers and their target genes are vital for cell fate determination in human cancer. Although the importance of numerous epigenetic machinery for regulating gliomagenesis has been previously recognized, how chromatin modifiers collaborate with specific transcription factors remains largely elusive. Herein we report that Pontin chromatin remodelling factor acts as a coactivator for LEF1 to activate TGFβ/SMAD signalling, thereby contributing to gliomagenesis. Pontin is highly expressed in gliomas, and its overexpression paralleled the grade elevation and poor prognosis of patients. Functional studies verified its oncogenic roles in GBM cells by facilitating cell proliferation, survival and invasion both in vitro and in vivo. RNA sequencing results revealed that Pontin regulated multiple target genes involved in TGFβ/SMAD signalling. Intriguingly, we found that Pontin amplified TGFβR2 gene transcription by recruiting LEF1, thereby activating TGFβ/SMAD signalling and facilitating gliomagenesis. Furthermore, higher TGFβR2 expression conferred worse patient outcomes in glioma. To conclude, our study revealed that the Pontin-LEF1 module plays a crucial role in driving TGFβR2 gene transcription, which could be exploited to target TGFβ/SMAD signalling for anti-glioma therapy.
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Affiliation(s)
- Xuexia Zhou
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, 300052, Tianjin, China.
- Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, 300052, Tianjin, China.
- Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, 300052, Tianjin, China.
| | - Xuebing Li
- Tianjin Key Laboratory of Lung Cancer Metastasis and Tumor Microenvironment, Tianjin Lung Cancer Institute, Department of Lung Cancer Surgery, Tianjin Medical University General Hospital, 300052, Tianjin, China
| | - Run Wang
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, 300052, Tianjin, China
- Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, 300052, Tianjin, China
- Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, 300052, Tianjin, China
| | - Dan Hua
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, 300052, Tianjin, China
- Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, 300052, Tianjin, China
- Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, 300052, Tianjin, China
| | - Cuiyun Sun
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, 300052, Tianjin, China
- Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, 300052, Tianjin, China
- Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, 300052, Tianjin, China
| | - Lin Yu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences of Tianjin Medical University, 300070, Tianjin, China
| | - Cuijuan Shi
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, 300052, Tianjin, China
- Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, 300052, Tianjin, China
- Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, 300052, Tianjin, China
| | - Wenjun Luo
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, 300052, Tianjin, China
- Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, 300052, Tianjin, China
- Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, 300052, Tianjin, China
| | - Zhendong Jiang
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, 300052, Tianjin, China
- Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, 300052, Tianjin, China
- Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, 300052, Tianjin, China
| | - Wenzhe An
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, 300052, Tianjin, China
- Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, 300052, Tianjin, China
- Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, 300052, Tianjin, China
| | - Qian Wang
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, 300052, Tianjin, China
- Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, 300052, Tianjin, China
- Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, 300052, Tianjin, China
| | - Shizhu Yu
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, 300052, Tianjin, China.
- Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, 300052, Tianjin, China.
- Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, 300052, Tianjin, China.
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14
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Sharpe M, González-Rosa JM, Wranitz F, Jeffrey S, Copenhaver K, Burns CG, Burns CE. Ruvbl2 Suppresses Cardiomyocyte Proliferation During Zebrafish Heart Development and Regeneration. Front Cell Dev Biol 2022; 10:800594. [PMID: 35178388 PMCID: PMC8844374 DOI: 10.3389/fcell.2022.800594] [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: 10/23/2021] [Accepted: 01/06/2022] [Indexed: 11/22/2022] Open
Abstract
Cardiomyocyte proliferation is an important source of new myocardium during heart development and regeneration. Consequently, mutations in drivers of cardiomyocyte proliferation cause congenital heart disease, and infarcted human hearts scar because cardiomyocytes exit the cell cycle postnatally. To boost cardiomyocyte proliferation in either setting, critical regulators must be identified. Through an ENU screen in zebrafish, the liebeskummer (lik) mutant was isolated and described as having elevated cardiomyocyte numbers during embryogenesis. The lik mutation results in a three amino acid insertion into Ruvbl2, a highly conserved ATPase. Because both gain- and loss-of-function properties have been described for ruvbl2lik, it remains unclear whether Ruvbl2 positively or negatively regulates cardiomyocyte proliferation. Here, we demonstrate that Ruvbl2 is a suppressor of cardiomyocyte proliferation during zebrafish heart development and regeneration. First, we confirmed speculation that augmented cardiomyocyte numbers in ruvbl2lik/lik hearts arise by hyperproliferation. To characterize bona fide ruvbl2 null animals, we created a ruvbl2 locus deletion allele (ruvbl2Δ). Like ruvbl2lik/lik mutants, ruvbl2Δ/Δ and compound heterozygote ruvbl2lik/Δ animals display ventricular hyperplasia, demonstrating that lik is a loss of function allele and that ruvbl2 represses cardiomyocyte proliferation. This activity is autonomous because constitutive myocardial overexpression of Ruvbl2 is sufficient to suppress cardiomyocyte proliferation in control hearts and rescue the hyperproliferation observed in ruvbl2Δ/Δ mutant hearts. Lastly, heat-shock inducible overexpression of Ruvbl2 suppresses cardiomyocyte proliferation during heart regeneration and leads to scarring. Together, our data demonstrate that Ruvbl2 functions autonomously as a suppressor of cardiomyocyte proliferation during both zebrafish heart development and adult heart regeneration.
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Affiliation(s)
- Michka Sharpe
- Division of Basic and Translational Cardiovascular Research, Department of Cardiology, Boston Children's Hospital, Boston, MA, United States.,Cardiovascular Research Center, Massachusetts General Hospital, Charlestown, MA, United States.,Harvard Medical School, Boston, MA, United States
| | - Juan Manuel González-Rosa
- Division of Basic and Translational Cardiovascular Research, Department of Cardiology, Boston Children's Hospital, Boston, MA, United States.,Cardiovascular Research Center, Massachusetts General Hospital, Charlestown, MA, United States.,Harvard Medical School, Boston, MA, United States
| | - Felicia Wranitz
- Division of Basic and Translational Cardiovascular Research, Department of Cardiology, Boston Children's Hospital, Boston, MA, United States.,Harvard Medical School, Boston, MA, United States
| | - Spencer Jeffrey
- Cardiovascular Research Center, Massachusetts General Hospital, Charlestown, MA, United States
| | - Katherine Copenhaver
- Division of Basic and Translational Cardiovascular Research, Department of Cardiology, Boston Children's Hospital, Boston, MA, United States.,Cardiovascular Research Center, Massachusetts General Hospital, Charlestown, MA, United States
| | - C Geoffrey Burns
- Division of Basic and Translational Cardiovascular Research, Department of Cardiology, Boston Children's Hospital, Boston, MA, United States.,Cardiovascular Research Center, Massachusetts General Hospital, Charlestown, MA, United States.,Harvard Medical School, Boston, MA, United States
| | - Caroline E Burns
- Division of Basic and Translational Cardiovascular Research, Department of Cardiology, Boston Children's Hospital, Boston, MA, United States.,Cardiovascular Research Center, Massachusetts General Hospital, Charlestown, MA, United States.,Harvard Medical School, Boston, MA, United States.,Harvard Stem Cell Institute, Cambridge, MA, United States
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15
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Rafat A, Dizaji Asl K, Mazloumi Z, Movassaghpour AA, Farahzadi R, Nejati B, Nozad Charoudeh H. Telomerase-based therapies in haematological malignancies. Cell Biochem Funct 2022; 40:199-212. [PMID: 35103334 DOI: 10.1002/cbf.3687] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 01/10/2022] [Indexed: 02/02/2023]
Abstract
Telomeres are specialized genetic structures present at the end of all eukaryotic linear chromosomes. They progressively get shortened after each cell division due to end replication problems. Telomere shortening (TS) and chromosomal instability cause apoptosis and massive cell death. Following oncogene activation and inactivation of tumour suppressor genes, cells acquire mechanisms such as telomerase expression and alternative lengthening of telomeres to maintain telomere length (TL) and prevent initiation of cellular senescence or apoptosis. Significant TS, telomerase activation and alteration in expression of telomere-associated proteins are frequent features of different haematological malignancies that reflect on the progression, response to therapy and recurrence of these diseases. Telomerase is a ribonucleoprotein enzyme that has a pivotal role in maintaining the TL. However, telomerase activity in most somatic cells is insufficient to prevent TS. In 85-90% of tumour cells, the critically short telomeric length is maintained by telomerase activation. Thus, overexpression of telomerase in most tumour cells is a potential target for cancer therapy. In this review, alteration of telomeres, telomerase and telomere-associated proteins in different haematological malignancies and related telomerase-based therapies are discussed.
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Affiliation(s)
- Ali Rafat
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Anatomical Sciences, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Khadijeh Dizaji Asl
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Anatomical Sciences, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zeinab Mazloumi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Applied Cell Sciences, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Raheleh Farahzadi
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Babak Nejati
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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16
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Maimoni Campanella JE, Ramos Junior SL, Rodrigues Kiraly VT, Severo Gomes AA, de Barros AC, Mateos PA, Freitas FZ, de Mattos Fontes MR, Borges JC, Bertolini MC. Biochemical and biophysical characterization of the RVB-1/RVB-2 protein complex, the RuvBL/RVB homologues in Neurospora crassa. Biochimie 2021; 191:11-26. [PMID: 34375717 DOI: 10.1016/j.biochi.2021.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 07/08/2021] [Accepted: 08/04/2021] [Indexed: 11/20/2022]
Abstract
The RVB proteins, composed of the conservative paralogs, RVB1 and RVB2, belong to the AAA+ (ATPases Associated with various cellular Activities) protein superfamily and are present in archaea and eukaryotes. The most distinct structural features are their ability to interact with each other forming the RVB1/2 complex and their participation in several macromolecular protein complexes leading them to be involved in many biological processes. We report here the biochemical and biophysical characterization of the Neurospora crassa RVB-1/RVB-2 complex. Chromatographic analyses revealed that the complex (APO) predominantly exists as a dimer in solution although hexamers were also observed. Nucleotides influence the oligomerization state, while ATP favors hexamers formation, ADP favors the formation of multimeric states, likely dodecamers, and the Molecular Dynamics (MD) simulations revealed the contribution of certain amino acid residues in the nucleotide stabilization. The complex binds to dsDNA fragments and exhibits ATPase activity, which is strongly enhanced in the presence of DNA. In addition, both GFP-fused proteins are predominantly nuclear, and their nuclear localization signals (NLS) interact with importin-α (NcIMPα). Our findings show that some properties are specific of the fungus proteins despite of their high identity to orthologous proteins. They are essential proteins in N. crassa, and the phenotypic defects exhibited by the heterokaryotic strains, mainly related to growth and development, indicate N. crassa as a promising organism to investigate additional biological and structural aspects of these proteins.
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Affiliation(s)
- Jonatas Erick Maimoni Campanella
- Departamento de Bioquímica e Química Orgânica, Instituto de Química, Universidade Estadual Paulista, UNESP, 14.800-060, Araraquara, SP, Brazil
| | - Sergio Luiz Ramos Junior
- Departamento de Química e Física Molecular, Instituto de Química de São Carlos, Universidade de São Paulo, USP, 13.560-970, São Carlos, SP, Brazil
| | - Vanessa Thomaz Rodrigues Kiraly
- Departamento de Química e Física Molecular, Instituto de Química de São Carlos, Universidade de São Paulo, USP, 13.560-970, São Carlos, SP, Brazil
| | - Antoniel Augusto Severo Gomes
- Departamento de Biofísica e Farmacologia, Instituto de Biociências, Universidade Estadual Paulista, UNESP, 18.618-689, Botucatu, SP, Brazil
| | - Andrea Coelho de Barros
- Departamento de Biofísica e Farmacologia, Instituto de Biociências, Universidade Estadual Paulista, UNESP, 18.618-689, Botucatu, SP, Brazil
| | - Pablo Acera Mateos
- Departamento de Bioquímica e Química Orgânica, Instituto de Química, Universidade Estadual Paulista, UNESP, 14.800-060, Araraquara, SP, Brazil
| | - Fernanda Zanolli Freitas
- Departamento de Bioquímica e Química Orgânica, Instituto de Química, Universidade Estadual Paulista, UNESP, 14.800-060, Araraquara, SP, Brazil
| | - Marcos Roberto de Mattos Fontes
- Departamento de Biofísica e Farmacologia, Instituto de Biociências, Universidade Estadual Paulista, UNESP, 18.618-689, Botucatu, SP, Brazil
| | - Júlio Cesar Borges
- Departamento de Química e Física Molecular, Instituto de Química de São Carlos, Universidade de São Paulo, USP, 13.560-970, São Carlos, SP, Brazil
| | - Maria Célia Bertolini
- Departamento de Bioquímica e Química Orgânica, Instituto de Química, Universidade Estadual Paulista, UNESP, 14.800-060, Araraquara, SP, Brazil.
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17
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Tang D, Zhang Z, Zboril E, Wetzel MD, Xu X, Zhang W, Chen L, Liu Z. Pontin Functions as A Transcriptional Co-activator for Retinoic Acid-induced HOX Gene Expression. J Mol Biol 2021; 433:166928. [PMID: 33713676 PMCID: PMC8184613 DOI: 10.1016/j.jmb.2021.166928] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 02/18/2021] [Accepted: 03/04/2021] [Indexed: 12/12/2022]
Abstract
Pontin is a AAA+ ATPase protein that has functions in various biological contexts including gene transcription regulation, chromatin remodeling, DNA damage sensing and repair, as well as assembly of protein and ribonucleoprotein complexes. Pontin is known to regulate the transcription of several important signaling pathways, including Wnt signaling. However, its role in early embryonic signaling regulation remains unclear. Retinoic acid (RA) signaling plays a central role in vertebrate development. Using an in vivo biotin tagging technology, we mapped the genome-wide binding pattern of Pontin before and after RA-induced differentiation in the pluripotent embryo carcinoma cell line NTERA-2. Biotin ChIP-seq revealed significant changes in genome-wide Pontin binding sites upon RA stimulation. We also identified a substantial amount of overlapping binding peaks between Pontin and RARα, especially on all of the HOX gene loci (A-D clusters). Pontin knockdown experiments showed that its chromatin binding at the HOX gene clusters is required for RA-induced HOX gene expression. Furthermore, we performed Global Run-On sequencing (GRO-seq) to map de novo transcripts genome-wide and found that Pontin knockdown significantly diminished nascent HOX gene transcripts, indicating that Pontin regulates HOX gene expression at the transcriptional level. Finally, proteomic analysis demonstrated that Pontin associates with chromatin organization/remodeling complexes and various other functional complexes. Altogether, we have demonstrated that Pontin is a critical transcriptional co-activator for RA-induced HOX gene activation.
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Affiliation(s)
- Dan Tang
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA; Department of General Practice, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Zhao Zhang
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Emily Zboril
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Michael D Wetzel
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Xinping Xu
- Jiangxi Institute of Respiratory Disease, The Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Wei Zhang
- Jiangxi Institute of Respiratory Disease, The Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Lizhen Chen
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA; Barshop Institute for Longevity and Aging Studies, Department of Cell Systems and Anatomy, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Zhijie Liu
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA.
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18
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Zhang G, Li S, Cheng KW, Chou TF. AAA ATPases as therapeutic targets: Structure, functions, and small-molecule inhibitors. Eur J Med Chem 2021; 219:113446. [PMID: 33873056 PMCID: PMC8165034 DOI: 10.1016/j.ejmech.2021.113446] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 03/21/2021] [Accepted: 03/30/2021] [Indexed: 01/07/2023]
Abstract
ATPases Associated with Diverse Cellular Activity (AAA ATPase) are essential enzymes found in all organisms. They are involved in various processes such as DNA replication, protein degradation, membrane fusion, microtubule serving, peroxisome biogenesis, signal transduction, and the regulation of gene expression. Due to the importance of AAA ATPases, several researchers identified and developed small-molecule inhibitors against these enzymes. We discuss six AAA ATPases that are potential drug targets and have well-developed inhibitors. We compare available structures that suggest significant differences of the ATP binding pockets among the AAA ATPases with or without ligand. The distances from ADP to the His20 in the His-Ser-His motif and the Arg finger (Arg353 or Arg378) in both RUVBL1/2 complex structures bound with or without ADP have significant differences, suggesting dramatically different interactions of the binding site with ADP. Taken together, the inhibitors of six well-studied AAA ATPases and their structural information suggest further development of specific AAA ATPase inhibitors due to difference in their structures. Future chemical biology coupled with proteomic approaches could be employed to develop variant specific, complex specific, and pathway specific inhibitors or activators for AAA ATPase proteins.
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Affiliation(s)
- Gang Zhang
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, 91125, United States.
| | - Shan Li
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, 91125, United States
| | - Kai-Wen Cheng
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, 91125, United States
| | - Tsui-Fen Chou
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, 91125, United States.
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19
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Zhang R, Cheung CY, Seo SU, Liu H, Pardeshi L, Wong KH, Chow LMC, Chau MP, Wang Y, Lee AR, Kwon WY, Chen S, Chan BKW, Wong K, Choy RKW, Ko BCB. RUVBL1/2 Complex Regulates Pro-Inflammatory Responses in Macrophages via Regulating Histone H3K4 Trimethylation. Front Immunol 2021; 12:679184. [PMID: 34276666 PMCID: PMC8282052 DOI: 10.3389/fimmu.2021.679184] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 05/14/2021] [Indexed: 12/13/2022] Open
Abstract
Macrophages play an important role in the host defense mechanism. In response to infection, macrophages activate a genetic program of pro-inflammatory response to kill any invading pathogen, and initiate an adaptive immune response. We have identified RUVBL2 - an ATP-binding protein belonging to the AAA+ (ATPase associated with diverse cellular activities) superfamily of ATPases - as a novel regulator in pro-inflammatory response of macrophages. Gene knockdown of Ruvbl2, or pharmacological inhibition of RUVBL1/2 activity, compromises type-2 nitric oxide synthase (Nos2) gene expression, nitric oxide production and anti-bacterial activity of mouse macrophages in response to lipopolysaccharides (LPS). RUVBL1/2 inhibitor similarly inhibits pro-inflammatory response in human monocytes, suggesting functional conservation of RUVBL1/2 in humans. Transcriptome analysis further revealed that major LPS-induced pro-inflammatory pathways in macrophages are regulated in a RUVBL1/2-dependent manner. Furthermore, RUVBL1/2 inhibition significantly reduced the level of histone H3K4me3 at the promoter region of Nos2 and Il6, two prototypical pro-inflammatory genes, and diminished the recruitment of NF-kappaB to the corresponding enhancers. Our study reveals RUVBL1/2 as an integral component of macrophage pro-inflammatory responses through epigenetic regulations, and the therapeutic potentials of RUVBL1/2 inhibitors in the treatment of diseases caused by aberrant activation of pro-inflammatory pathways.
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Affiliation(s)
- Rui Zhang
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
| | - Chris Y Cheung
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
| | - Sang-Uk Seo
- Department of Microbiology, Department of Biomedicine & Health Sciences, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Hang Liu
- The University Research Facility in Chemical and Environmental Analysis, The Hong Kong Polytechnic University, Hong Kong, China
| | - Lakhansing Pardeshi
- Faculty of Health Sciences, University of Macau, Avenida da Universidade, Taipa, Macau.,Genomics and Bioinformatics Core, Faculty of Health Sciences, University of Macau, Avenida da Universidade, Taipa, Macau
| | - Koon Ho Wong
- Faculty of Health Sciences, University of Macau, Avenida da Universidade, Taipa, Macau.,Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Avenida da Universidade, Taipa, Macau
| | - Larry M C Chow
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
| | - Mary P Chau
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
| | - Yixiang Wang
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
| | - Ah Ra Lee
- Department of Microbiology, Department of Biomedicine & Health Sciences, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Woon Yong Kwon
- Department of Emergency Medicine, Seoul National University College of Medicine, Seoul, South Korea
| | - Sheng Chen
- Department of Infectious Diseases and Public Health, The City University of Hong Kong, Hong Kong, China
| | - Bill Kwan-Wai Chan
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China
| | - Kenneth Wong
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, China
| | - Richard K W Choy
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, China
| | - Ben C B Ko
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
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20
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Wang Y, Zhou J, Mackintosh SG, Du Y. RuvB-Like Protein 2 Interacts with the NS1 Protein of Influenza A Virus and Affects Apoptosis That Is Counterbalanced by Type I Interferons. Viruses 2021; 13:v13061038. [PMID: 34072766 PMCID: PMC8229658 DOI: 10.3390/v13061038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 05/12/2021] [Accepted: 05/28/2021] [Indexed: 11/29/2022] Open
Abstract
The NS1 protein of influenza A virus (IAV) plays important roles in viral pathogenesis and host immune response. Through a proteomic approach, we have identified RuvB-like proteins 1 and 2 (RuvBL1 and RuvBL2) as interacting partners of the NS1 protein of IAVs. Infection of human lung A549 cells with A/PR/8/34 (PR8) virus resulted in reductions in the protein levels of RuvBL2 but not RuvBL1. Further studies with RuvBL2 demonstrated that the NS1-RuvBL2 interaction is RNA-independent, and RuvBL2 binds the RNA-binding domain of the NS1. Infection of interferon (IFN)-deficient Vero cells with wild-type or delNS1 PR8 virus reduced RuvBL2 protein levels and induced apoptosis; delNS1 virus caused more reductions in RuvBL2 protein levels and induced more apoptosis than did wild-type virus. Knockdown of RuvBL2 by siRNAs induced apoptosis and overexpression of RuvBL2 resulted in increased resistance to infection-induced apoptosis in Vero cells. These results suggest that a non-NS1 viral element or elements induce apoptosis by suppressing RuvBL2 protein levels, and the NS1 inhibits the non-NS1 viral element-induced apoptosis by maintaining RuvBL2 abundance in infected cells in the absence of IFN influence. In contrast to Vero cells, infection of IFN-competent A549 cells with PR8 virus caused reductions in RuvBL2 protein levels but did not induce apoptosis. Concomitantly, pretreatment of Vero cells with a recombinant IFN resulted in resistance to infection-induced apoptosis. These results demonstrate that the infection-induced, RuvBL2-regulated apoptosis in infected cells is counterbalanced by IFN survival signals. Our results reveal a novel mechanism underlying the infection-induced apoptosis that can be modulated by the NS1 and type I IFN signaling in IAV-infected cells.
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Affiliation(s)
- Yimeng Wang
- Department of Biological Sciences, University of Arkansas, Fayetteville, AR 72701, USA; (Y.W.); (J.Z.)
| | - Jianhong Zhou
- Department of Biological Sciences, University of Arkansas, Fayetteville, AR 72701, USA; (Y.W.); (J.Z.)
| | - Samuel G. Mackintosh
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA;
| | - Yuchun Du
- Department of Biological Sciences, University of Arkansas, Fayetteville, AR 72701, USA; (Y.W.); (J.Z.)
- Correspondence: ; Tel.: +1-479-575-6944
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21
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Dafinger C, Benzing T, Dötsch J, Schermer B, Liebau MC. Targeted deletion of Ruvbl1 results in severe defects of epidermal development and perinatal mortality. Mol Cell Pediatr 2021; 8:1. [PMID: 33580312 PMCID: PMC7881068 DOI: 10.1186/s40348-021-00111-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 01/26/2021] [Indexed: 11/29/2022] Open
Abstract
Epidermal development is a complex process of regulated cellular proliferation, differentiation, and tightly controlled cell death involving multiple cellular signaling networks. Here, we report a first description linking the AAA+ (ATPases associated with various cellular activities) superfamily protein Ruvbl1 to mammalian epidermal development. Keratinocyte-specific Ruvbl1 knockout mice (Ruvbl1fl/flK14:Cretg) show a severe phenotype including dramatic structural epidermal defects resulting in the loss of the functional skin barrier and perinatal death. Thus, Ruvbl1 is a newly identified essential player for the development of differentiated epidermis in mice.
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Affiliation(s)
- Claudia Dafinger
- Department of Pediatrics, Faculty of Medicine and University Hospital Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany.,Department II of Internal Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.,CECAD, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Thomas Benzing
- Department II of Internal Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.,CECAD, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.,Systems Biology of Ageing Cologne, University of Cologne, Cologne, Germany.,Center for Molecular Medicine, University of Cologne, Cologne, Germany
| | - Jörg Dötsch
- Department of Pediatrics, Faculty of Medicine and University Hospital Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany
| | - Bernhard Schermer
- Department II of Internal Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.,CECAD, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.,Systems Biology of Ageing Cologne, University of Cologne, Cologne, Germany.,Center for Molecular Medicine, University of Cologne, Cologne, Germany
| | - Max C Liebau
- Department of Pediatrics, Faculty of Medicine and University Hospital Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany. .,Department II of Internal Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany. .,Center for Molecular Medicine, University of Cologne, Cologne, Germany.
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22
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Sohn EJ, Moon HJ, Lim JK, Kim DS, Kim JH. Regulation of the protein stability and transcriptional activity of OCT4 in stem cells. Adv Biol Regul 2020; 79:100777. [PMID: 33451972 DOI: 10.1016/j.jbior.2020.100777] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/15/2020] [Accepted: 12/21/2020] [Indexed: 12/31/2022]
Abstract
OCT4 (also known as Oct3 and Oct3/4), which is encoded by Pou5f1, is expressed in early embryonic cells and plays an important role in early development, pluripotency maintenance, and self-renewal of embryonic stem cells. It also regulates the reprogramming of somatic cells into induced pluripotent stem cells. Several OCT4-binding proteins, including SOX2 and NANOG, reportedly regulate gene transcription in stem cells. An increasing number of evidence suggests that not only gene transcription but also post-translational modifications of OCT4 play a pivotal role in regulating the expression and activity of OCT4. For instance, ubiquitination and sumoylation have been reported to regulate OCT4 protein stability. In addition, the phosphorylation of Ser347 in OCT4 also stabilizes the OCT4 protein level. Recently, we identified KAP1 as an OCT4-binding protein and reported the KAP1-mediated regulation of OCT4 protein stability. KAP1 overexpression led to an increased proliferation of mouse embryonic stem cells and promoted the reprogramming of somatic cells resulting in induced pluripotent stem cells. In this review, we discuss how the protein stability and function of OCT4 are regulated by protein-protein interaction in stem cells.
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Affiliation(s)
- Eun Jung Sohn
- Medical Research Center for Ischemic Tissue Regeneration, Pusan National University, Yangsan, 50612, Republic of Korea; Department of Physiology, School of Medicine, Pusan National University, Yangsan, 50612, Republic of Korea
| | - Hye Ji Moon
- Medical Research Center for Ischemic Tissue Regeneration, Pusan National University, Yangsan, 50612, Republic of Korea; Department of Physiology, School of Medicine, Pusan National University, Yangsan, 50612, Republic of Korea
| | - Jae Kyong Lim
- Medical Research Center for Ischemic Tissue Regeneration, Pusan National University, Yangsan, 50612, Republic of Korea; Department of Physiology, School of Medicine, Pusan National University, Yangsan, 50612, Republic of Korea
| | - Da Sol Kim
- Medical Research Center for Ischemic Tissue Regeneration, Pusan National University, Yangsan, 50612, Republic of Korea; Department of Physiology, School of Medicine, Pusan National University, Yangsan, 50612, Republic of Korea
| | - Jae Ho Kim
- Medical Research Center for Ischemic Tissue Regeneration, Pusan National University, Yangsan, 50612, Republic of Korea.
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23
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Deregulated levels of RUVBL1 induce transcription-dependent replication stress. Int J Biochem Cell Biol 2020; 128:105839. [PMID: 32846207 DOI: 10.1016/j.biocel.2020.105839] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 08/11/2020] [Accepted: 08/20/2020] [Indexed: 12/16/2022]
Abstract
Chromatin regulators control transcription and replication, however if and how they might influence the coordination of these processes still is largely unknown. RUVBL1 and the related ATPase RUVBL2 participate in multiple nuclear processes and are implicated in cancer. Here, we report that both the excess and the deficit of the chromatin regulator RUVBL1 impede DNA replication as a consequence of altered transcription. Surprisingly, cells that either overexpressed or were silenced for RUVBL1 had slower replication fork rates and accumulated phosphorylated H2AX, dependent on active transcription. However, the mechanisms of transcription-dependent replication stress were different when RUVBL1 was overexpressed and when depleted. RUVBL1 overexpression led to increased c-Myc-dependent pause release of RNAPII, as evidenced by higher overall transcription, much stronger Ser2 phosphorylation of Rpb1- C-terminal domain, and enhanced colocalization of Rpb1 and c-Myc. RUVBL1 deficiency resulted in increased ubiquitination of Rpb1 and reduced mobility of an RNAP subunit, suggesting accumulation of stalled RNAPIIs on chromatin. Overall, our data show that by modulating the state of RNAPII complexes, RUVBL1 deregulation induces replication-transcription interference and compromises genome integrity during S-phase.
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24
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Lin D, Lin B, Bhanot H, Riou R, Abt NB, Rajagopal J, Saladi SV. RUVBL1 is an amplified epigenetic factor promoting proliferation and inhibiting differentiation program in head and neck squamous cancers. Oral Oncol 2020; 111:104930. [PMID: 32745900 DOI: 10.1016/j.oraloncology.2020.104930] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/24/2020] [Accepted: 07/22/2020] [Indexed: 12/14/2022]
Abstract
Mutations in histone modifying enzymes and histone variants were identified in multiple cancers in The Cancer Genome Atlas (TCGA) studies. However, very little progress and understanding has been made in identifying the contribution of epigenetic factors in head and neck squamous cell carcinoma (HNSCC). Here, we report the identification of RUVBL1 (TIP49a), a component of the TIP60 histone modifying complex as being amplified and overexpressed in HNSCC. RUVBL1 plays a key role in incorporating histone variant H2AZ in chromatin thereby regulating transcription of key genes involved in differentiation, cancer cell proliferation and invasion. H2AZ is also overexpressed in HNSCC tumors thereby regulating RUVBL1/H2AZ dependent transcriptional programs. Patient data analysis of multiple cohorts including TCGA and single cell HNSCC data indicated RUVBL1 overexpression as a poor prognostic marker and predicts poor survival. In vitro experiments indicate a pro-proliferative role for RUVBL1/H2AZ in HNSCC cells. RUVBL1 inversely correlates with differentiation program and positively correlates with oncogenic programs, making it a key contributor to tumorigenesis and a vulnerable therapeutic target in HNSCC patients.
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Affiliation(s)
- Derrick Lin
- Massachusetts Eye and Ear Infirmary, Harvard Medical School, United States; Massachusetts General Hospital Cancer Center, United States
| | - Brian Lin
- Center for Regenerative Medicine, Massachusetts General Hospital, Harvard Medical School, United States
| | - Haymanti Bhanot
- Dana Farber Cancer Institute, Harvard Medical School, United States
| | - Rozenn Riou
- Massachusetts Eye and Ear Infirmary, Harvard Medical School, United States
| | - Nicholas B Abt
- Massachusetts Eye and Ear Infirmary, Harvard Medical School, United States; Massachusetts General Hospital Cancer Center, United States
| | - Jayaraj Rajagopal
- Center for Regenerative Medicine, Massachusetts General Hospital, Harvard Medical School, United States; Broad Institute of MIT and Harvard, United States
| | - Srinivas Vinod Saladi
- Massachusetts Eye and Ear Infirmary, Harvard Medical School, United States; Massachusetts General Hospital Cancer Center, United States; Broad Institute of MIT and Harvard, United States.
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25
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Embryonic Program Activated during Blast Crisis of Chronic Myelogenous Leukemia (CML) Implicates a TCF7L2 and MYC Cooperative Chromatin Binding. Int J Mol Sci 2020; 21:ijms21114057. [PMID: 32517078 PMCID: PMC7312032 DOI: 10.3390/ijms21114057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/02/2020] [Accepted: 06/03/2020] [Indexed: 12/25/2022] Open
Abstract
Chronic myeloid leukemia (CML) is characterized by an inherent genetic instability, which contributes to the progression of the disease towards an accelerated phase (AP) and blast crisis (BC). Several cytogenetic and genomic alterations have been reported in the progression towards BC, but the precise molecular mechanisms of this event are undetermined. Transcription Factor 7 like 2 (TFC7L2) is a member of the TCF family of proteins that are known to activate WNT target genes such as Cyclin D1. TCF7L2 has been shown to be overexpressed in acute myeloid leukemia (AML) and represents a druggable target. We report here that TCF7L2 transcription factor expression was found to be correlated to blast cell numbers during the progression of the disease. In these cells, TCF7L2 CHIP-sequencing highlighted distal cis active enhancer, such as elements in SMAD3, ATF5, and PRMT1 genomic regions and a proximal active transcriptional program of 144 genes. The analysis of CHIP-sequencing of MYC revealed a significant overlapping of TCF7L2 epigenetic program with MYC. The β-catenin activator lithium chloride and the MYC-MAX dimerization inhibitor 10058-F4 significantly modified the expression of three epigenetic targets in the BC cell line K562. These results suggest for the first time the cooperative role of TCF7L2 and MYC during CML-BC and they strengthen previous data showing a possible involvement of embryonic genes in this process.
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26
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Ju D, Zhang W, Yan J, Zhao H, Li W, Wang J, Liao M, Xu Z, Wang Z, Zhou G, Mei L, Hou N, Ying S, Cai T, Chen S, Xie X, Lai L, Tang C, Park N, Takahashi JS, Huang N, Qi X, Zhang EE. Chemical perturbations reveal that RUVBL2 regulates the circadian phase in mammals. Sci Transl Med 2020; 12:12/542/eaba0769. [DOI: 10.1126/scitranslmed.aba0769] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Accepted: 04/13/2020] [Indexed: 12/12/2022]
Abstract
Transcriptional regulation lies at the core of the circadian clockwork, but how the clock-related transcription machinery controls the circadian phase is not understood. Here, we show both in human cells and in mice that RuvB-like ATPase 2 (RUVBL2) interacts with other known clock proteins on chromatin to regulate the circadian phase. Pharmacological perturbation of RUVBL2 with the adenosine analog compound cordycepin resulted in a rapid-onset 12-hour clock phase-shift phenotype at human cell, mouse tissue, and whole-animal live imaging levels. Using simple peripheral injection treatment, we found that cordycepin penetrated the blood-brain barrier and caused rapid entrainment of the circadian phase, facilitating reduced duration of recovery in a mouse jet-lag model. We solved a crystal structure for human RUVBL2 in complex with a physiological metabolite of cordycepin, and biochemical assays showed that cordycepin treatment caused disassembly of an interaction between RUVBL2 and the core clock component BMAL1. Moreover, we showed with spike-in ChIP-seq analysis and binding assays that cordycepin treatment caused disassembly of the circadian super-complex, which normally resides at E-box chromatin loci such as PER1, PER2, DBP, and NR1D1. Mathematical modeling supported that the observed type 0 phase shifts resulted from derepression of E-box clock gene transcription.
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Affiliation(s)
- Dapeng Ju
- National Institute of Biological Sciences, Beijing 102206, China
- College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Wei Zhang
- RPXDs (Suzhou) Co. Ltd., Suzhou City, Jiangsu Province 215028, China
| | - Jiawei Yan
- School of Life Sciences, Peking University, Beijing 100871, China
| | - Haijiao Zhao
- National Institute of Biological Sciences, Beijing 102206, China
| | - Wei Li
- RPXDs (Suzhou) Co. Ltd., Suzhou City, Jiangsu Province 215028, China
| | - Jiawen Wang
- National Institute of Biological Sciences, Beijing 102206, China
| | - Meimei Liao
- National Institute of Biological Sciences, Beijing 102206, China
- College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Zhancong Xu
- National Institute of Biological Sciences, Beijing 102206, China
| | - Zhiqiang Wang
- National Institute of Biological Sciences, Beijing 102206, China
| | - Guanshen Zhou
- National Institute of Biological Sciences, Beijing 102206, China
| | - Long Mei
- National Institute of Biological Sciences, Beijing 102206, China
- School of Life Sciences, Peking University, Beijing 100871, China
| | - Nannan Hou
- National Institute of Biological Sciences, Beijing 102206, China
| | - Shuhua Ying
- National Institute of Biological Sciences, Beijing 102206, China
| | - Tao Cai
- National Institute of Biological Sciences, Beijing 102206, China
| | - She Chen
- National Institute of Biological Sciences, Beijing 102206, China
| | - Xiaowen Xie
- School of Life Sciences, Peking University, Beijing 100871, China
- Center for Quantitative Biology, Peking University, Beijing 100871, China
| | - Luhua Lai
- Center for Quantitative Biology, Peking University, Beijing 100871, China
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Chao Tang
- Center for Quantitative Biology, Peking University, Beijing 100871, China
- School of Physics and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Noheon Park
- Department of Neuroscience, University of Texas Southwestern Medical Center, Dallas, TX 75390-9111, USA
| | - Joseph S. Takahashi
- Department of Neuroscience, University of Texas Southwestern Medical Center, Dallas, TX 75390-9111, USA
- Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390-9111, USA
| | - Niu Huang
- National Institute of Biological Sciences, Beijing 102206, China
- Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing 102206, China
| | - Xiangbing Qi
- National Institute of Biological Sciences, Beijing 102206, China
- Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing 102206, China
| | - Eric Erquan Zhang
- National Institute of Biological Sciences, Beijing 102206, China
- Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing 102206, China
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Nano N, Ugwu F, Seraphim TV, Li T, Azer G, Isaac M, Prakesch M, Barbosa LRS, Ramos CHI, Datti A, Houry WA. Sorafenib as an Inhibitor of RUVBL2. Biomolecules 2020; 10:biom10040605. [PMID: 32295120 PMCID: PMC7226205 DOI: 10.3390/biom10040605] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 04/06/2020] [Accepted: 04/10/2020] [Indexed: 12/19/2022] Open
Abstract
RUVBL1 and RUVBL2 are highly conserved ATPases that belong to the AAA+ (ATPases Associated with various cellular Activities) superfamily and are involved in various complexes and cellular processes, several of which are closely linked to oncogenesis. The proteins were implicated in DNA damage signaling and repair, chromatin remodeling, telomerase activity, and in modulating the transcriptional activities of proto-oncogenes such as c-Myc and β-catenin. Moreover, both proteins were found to be overexpressed in several different types of cancers such as breast, lung, kidney, bladder, and leukemia. Given their various roles and strong involvement in carcinogenesis, the RUVBL proteins are considered to be novel targets for the discovery and development of therapeutic cancer drugs. Here, we describe the identification of sorafenib as a novel inhibitor of the ATPase activity of human RUVBL2. Enzyme kinetics and surface plasmon resonance experiments revealed that sorafenib is a weak, mixed non-competitive inhibitor of the protein’s ATPase activity. Size exclusion chromatography and small angle X-ray scattering data indicated that the interaction of sorafenib with RUVBL2 does not cause a significant effect on the solution conformation of the protein; however, the data suggested that the effect of sorafenib on RUVBL2 activity is mediated by the insertion domain in the protein. Sorafenib also inhibited the ATPase activity of the RUVBL1/2 complex. Hence, we propose that sorafenib could be further optimized to be a potent inhibitor of the RUVBL proteins.
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Affiliation(s)
- Nardin Nano
- Department of Biochemistry, University of Toronto, Toronto, ON M5G 1M1, Canada; (N.N.); (F.U.); (T.V.S.); (T.L.); (G.A.)
| | - Francisca Ugwu
- Department of Biochemistry, University of Toronto, Toronto, ON M5G 1M1, Canada; (N.N.); (F.U.); (T.V.S.); (T.L.); (G.A.)
| | - Thiago V. Seraphim
- Department of Biochemistry, University of Toronto, Toronto, ON M5G 1M1, Canada; (N.N.); (F.U.); (T.V.S.); (T.L.); (G.A.)
| | - Tangzhi Li
- Department of Biochemistry, University of Toronto, Toronto, ON M5G 1M1, Canada; (N.N.); (F.U.); (T.V.S.); (T.L.); (G.A.)
| | - Gina Azer
- Department of Biochemistry, University of Toronto, Toronto, ON M5G 1M1, Canada; (N.N.); (F.U.); (T.V.S.); (T.L.); (G.A.)
| | - Methvin Isaac
- Drug Discovery Program, Ontario Institute for Cancer Research, Toronto, ON M5G 0A3, Canada; (M.I.); (M.P.)
| | - Michael Prakesch
- Drug Discovery Program, Ontario Institute for Cancer Research, Toronto, ON M5G 0A3, Canada; (M.I.); (M.P.)
| | | | - Carlos H. I. Ramos
- Institute of Chemistry, University of Campinas UNICAMP, Campinas SP 13083-970, Brazil;
| | - Alessandro Datti
- Department of Agriculture, Food, and Environmental Sciences, University of Perugia, 06121 Perugia, Italy;
| | - Walid A. Houry
- Department of Biochemistry, University of Toronto, Toronto, ON M5G 1M1, Canada; (N.N.); (F.U.); (T.V.S.); (T.L.); (G.A.)
- Department of Chemistry, University of Toronto, Toronto, ON M5S 3H6, Canada
- Correspondence: ; Tel.: +(416)-946-7141; Fax: +(416)-978-8548
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28
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Delom F, Mohtar MA, Hupp T, Fessart D. The anterior gradient-2 interactome. Am J Physiol Cell Physiol 2020; 318:C40-C47. [DOI: 10.1152/ajpcell.00532.2018] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The anterior gradient-2 (AGR2) is an endoplasmic reticulum (ER)-resident protein belonging to the protein disulfide isomerase family that mediates the formation of disulfide bonds and assists the protein quality control in the ER. In addition to its role in proteostasis, extracellular AGR2 is responsible for various cellular effects in many types of cancer, including cell proliferation, survival, and metastasis. Various OMICs approaches have been used to identify AGR2 binding partners and to investigate the functions of AGR2 in the ER and outside the cell. Emerging data showed that AGR2 exists not only as monomer, but it can also form homodimeric structure and thus interact with different partners, yielding different biological outcomes. In this review, we summarize the AGR2 “interactome” and discuss the pathological and physiological role of such AGR2 interactions.
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Affiliation(s)
- Frederic Delom
- University of Bordeaux, ACTION, Bordeaux, France
- Institut National de la Santé et de la Recherche Médicale, Bordeaux, France
- Institut Bergonié, Bordeaux, France
| | - M. Aiman Mohtar
- University Kebangsaan Malaysia, Medical Molecular Biology Institute (UMBI), The National University of Malaysia, Kuala Lumpur, Malaysia
| | - Ted Hupp
- University of Edinburgh, Institute of Genetics and Molecular Medicine, Edinburgh, Scotland, United Kingdom
- University of Gdansk, International Centre for Cancer Vaccine Science, Gdansk, Poland
| | - Delphine Fessart
- University of Bordeaux, ACTION, Bordeaux, France
- Institut National de la Santé et de la Recherche Médicale, Bordeaux, France
- Institut Bergonié, Bordeaux, France
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29
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Chen J, Liu G, Wu Y, Ma J, Wu H, Xie Z, Chen S, Yang Y, Wang S, Shen P, Fang Y, Fan S, Shen S, Fang X. CircMYO10 promotes osteosarcoma progression by regulating miR-370-3p/RUVBL1 axis to enhance the transcriptional activity of β-catenin/LEF1 complex via effects on chromatin remodeling. Mol Cancer 2019; 18:150. [PMID: 31665067 PMCID: PMC6819556 DOI: 10.1186/s12943-019-1076-1] [Citation(s) in RCA: 99] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 09/16/2019] [Indexed: 12/13/2022] Open
Abstract
Background CircMYO10 is a circular RNA generated by back-splicing of gene MYO10 and is upregulated in osteosarcoma cell lines, but its functional role in osteosarcoma is still unknown. This study aimed to clarify the mechanism of circMYO10 in osteosarcoma. Methods CircMYO10 expression in 10 paired osteosarcoma and chondroma tissues was assessed by quantitative reverse transcription polymerase chain reaction (PCR). The function of circMYO10/miR-370-3p/RUVBL1 axis was assessed regarding two key characteristics: proliferation and endothelial–mesenchymal transition (EMT). Bioinformatics analysis, western blotting, real-time PCR, fluorescence in situ hybridization, immunoprecipitation, RNA pull-down assays, luciferase reporter assays, chromatin immunoprecipitation, and rescue experiments were used to evaluate the mechanism. Stably transfected MG63 cells were injected via tail vein or subcutaneously into nude mice to assess the role of circMYO10 in vivo. Results CircMYO10 was significantly upregulated, while miR-370-3p was downregulated, in osteosarcoma cell lines and human osteosarcoma samples. Silencing circMYO10 inhibited cell proliferation and EMT in vivo and in vitro. Mechanistic investigations revealed that miR-370-3p targets RUVBL1 directly, and inhibits the interaction between RUVBL1 and β-catenin/LEF1 complex while circMYO10 showed a contrary effect via the inhibition of miR-370-3p. RUVBL1 was found to be complexed with chromatin remodeling and histone-modifying factor TIP60, and lymphoid enhancer factor-1 (LEF1) to promote histone H4K16 acetylation (H4K16Ac) in the vicinity of the promoter region of gene C-myc. Chromatin immunoprecipitation methods showed that miR-370-3p sponge promotes H4K16Ac in the indicated region, which is partially abrogated by RUVBL1 small hairpin RNA (shRNA) while circMYO10 showed a contrary result via the inhibition of miR-370-3p. Either miR-370-3p sponge or ShRUVBL1 attenuated circMYO10-induced phenotypes in osteosarcoma cell lines. MiR-370-3p inhibition abrogated the inhibition of proliferation, EMT of osteosarcoma cells in vitro and in vivo seen upon circMYO10 suppression via Wnt/β-catenin signaling. Conclusions CircMYO10 promotes osteosarcoma progression by regulating miR-370-3p/RUVBL1 axis to promote chromatin remodeling and thus enhances the transcriptional activity of β-catenin/LEF1 complex, which indicates that circMYO10 may be a potential therapeutic target for osteosarcoma treatment.
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Affiliation(s)
- Junxin Chen
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Gang Liu
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Yizheng Wu
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Jianjun Ma
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Hongfei Wu
- Department of Spinal Surgery, Orthopaedic Medical Center, Hospital of Zhejiang Armed Police Corps, Jiaxing, Zhejiang Province, China
| | - Ziang Xie
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Shuai Chen
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Yute Yang
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Shengyu Wang
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Panyang Shen
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Yifan Fang
- Hangzhou Foreign Language School, Hangzhou, Zhejiang Province, China
| | - Shunwu Fan
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Shuying Shen
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China.
| | - Xiangqian Fang
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China.
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30
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Chen X, Tang WJ, Shi JB, Liu MM, Liu XH. Therapeutic strategies for targeting telomerase in cancer. Med Res Rev 2019; 40:532-585. [PMID: 31361345 DOI: 10.1002/med.21626] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 07/12/2019] [Accepted: 07/16/2019] [Indexed: 12/13/2022]
Abstract
Telomere and telomerase play important roles in abnormal cell proliferation, metastasis, stem cell maintenance, and immortalization in various cancers. Therefore, designing of drugs targeting telomerase and telomere is of great significance. Over the past two decades, considerable knowledge regarding telomere and telomerase has been accumulated, which provides theoretical support for the design of therapeutic strategies such as telomere elongation. Therefore, the development of telomere-based therapies such as nucleoside analogs, non-nucleoside small molecules, antisense technology, ribozymes, and dominant negative human telomerase reverse transcriptase are being prioritized for eradicating a majority of tumors. While the benefits of telomere-based therapies are obvious, there is a need to address the limitations of various therapeutic strategies to improve the possibility of clinical applications. In this study, current knowledge of telomere and telomerase is discussed, and therapeutic strategies based on recent research are reviewed.
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Affiliation(s)
- Xing Chen
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, People's Republic of China
| | - Wen-Jian Tang
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, People's Republic of China
| | - Jing Bo Shi
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, People's Republic of China
| | - Ming Ming Liu
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, People's Republic of China
| | - Xin-Hua Liu
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, People's Republic of China
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31
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Alnafakh RAA, Adishesh M, Button L, Saretzki G, Hapangama DK. Telomerase and Telomeres in Endometrial Cancer. Front Oncol 2019; 9:344. [PMID: 31157162 PMCID: PMC6533802 DOI: 10.3389/fonc.2019.00344] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 04/15/2019] [Indexed: 12/11/2022] Open
Abstract
Telomeres at the termini of human chromosomes are shortened with each round of cell division due to the “end replication problem” as well as oxidative stress. During carcinogenesis, cells acquire or retain mechanisms to maintain telomeres to avoid initiation of cellular senescence or apoptosis and halting cell division by critically short telomeres. The unique reverse transcriptase enzyme complex, telomerase, catalyzes the maintenance of telomeres but most human somatic cells do not have sufficient telomerase activity to prevent telomere shortening. Tissues with high and prolonged replicative potential demonstrate adequate cellular telomerase activity to prevent telomere erosion, and high telomerase activity appears to be a critical feature of most (80–90%) epithelial cancers, including endometrial cancer. Endometrial cancers regress in response to progesterone which is frequently used to treat advanced endometrial cancer. Endometrial telomerase is inhibited by progestogens and deciphering telomere and telomerase biology in endometrial cancer is therefore important, as targeting telomerase (a downstream target of progestogens) in endometrial cancer may provide novel and more effective therapeutic avenues. This review aims to examine the available evidence for the role and importance of telomere and telomerase biology in endometrial cancer.
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Affiliation(s)
- Rafah A A Alnafakh
- Liverpool Women's Hospital NHS Foundation Trust, Liverpool, United Kingdom.,Department of Women's and Children's Health, Institute of Translational Medicine, University of Liverpool, Liverpool, United Kingdom
| | - Meera Adishesh
- Liverpool Women's Hospital NHS Foundation Trust, Liverpool, United Kingdom.,Department of Women's and Children's Health, Institute of Translational Medicine, University of Liverpool, Liverpool, United Kingdom
| | - Lucy Button
- Liverpool Women's Hospital NHS Foundation Trust, Liverpool, United Kingdom.,Department of Women's and Children's Health, Institute of Translational Medicine, University of Liverpool, Liverpool, United Kingdom
| | - Gabriele Saretzki
- The Ageing Biology Centre and Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Dharani K Hapangama
- Liverpool Women's Hospital NHS Foundation Trust, Liverpool, United Kingdom.,Department of Women's and Children's Health, Institute of Translational Medicine, University of Liverpool, Liverpool, United Kingdom
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32
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Irmak D, Fatima A, Gutiérrez-Garcia R, Rinschen MM, Wagle P, Altmüller J, Arrigoni L, Hummel B, Klein C, Frese CK, Sawarkar R, Rada-Iglesias A, Vilchez D. Mechanism suppressing H3K9 trimethylation in pluripotent stem cells and its demise by polyQ-expanded huntingtin mutations. Hum Mol Genet 2019; 27:4117-4134. [PMID: 30452683 DOI: 10.1093/hmg/ddy304] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 08/10/2018] [Indexed: 02/06/2023] Open
Abstract
Pluripotent stem cells are invaluable resources to study development and disease, holding a great promise for regenerative medicine. Here we use human embryonic stem cells (hESCs) and induced pluripotent stem cells (iPSCs) from patients with Huntington's disease (HD-iPSCs) to shed light into the normal function of huntingtin (HTT) and its demise in disease. We find that HTT binds ATF7IP, a regulator of the histone H3 methyltransferase SETDB1. HTT inhibits the interaction of the ATF7IP-SETDB1 complex with other heterochromatin regulators and transcriptional repressors, maintaining low levels of H3K9 trimethylation (H3K9me3) in hESCs. Loss of HTT promotes global increased H3K9me3 levels and enrichment of H3K9me3 marks at distinct genes, including transcriptional regulators of neuronal differentiation. Although these genes are normally expressed at low amounts in hESCs, HTT knockdown (KD) reduces their induction during neural differentiation. Notably, mutant expanded polyglutamine repeats in HTT diminish its interaction with ATF7IP-SETDB1 complex and trigger H3K9me3 in HD-iPSCs. Conversely, KD of ATF7IP in HD-iPSCs reduces H3K9me3 alterations and ameliorates gene expression changes in their neural counterparts. Taken together, our results indicate ATF7IP as a potential target to correct aberrant H3K9me3 levels induced by mutant HTT.
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Affiliation(s)
- Dilber Irmak
- Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Joseph-Stelzmann-Strasse 26, Cologne, Germany
| | - Azra Fatima
- Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Joseph-Stelzmann-Strasse 26, Cologne, Germany
| | - Ricardo Gutiérrez-Garcia
- Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Joseph-Stelzmann-Strasse 26, Cologne, Germany
| | - Markus M Rinschen
- Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Joseph-Stelzmann-Strasse 26, Cologne, Germany
| | - Prerana Wagle
- Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Joseph-Stelzmann-Strasse 26, Cologne, Germany
| | - Janine Altmüller
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Robert-Koch-Strasse 21, Cologne, Germany.,Cologne Center for Genomics (CCG), University of Cologne, Cologne, Germany
| | - Laura Arrigoni
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Barbara Hummel
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Corinna Klein
- Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Joseph-Stelzmann-Strasse 26, Cologne, Germany
| | - Christian K Frese
- Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Joseph-Stelzmann-Strasse 26, Cologne, Germany
| | - Ritwick Sawarkar
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Alvaro Rada-Iglesias
- Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Joseph-Stelzmann-Strasse 26, Cologne, Germany.,Center for Molecular Medicine Cologne (CMMC), University of Cologne, Robert-Koch-Strasse 21, Cologne, Germany
| | - David Vilchez
- Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Joseph-Stelzmann-Strasse 26, Cologne, Germany
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33
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Schořová Š, Fajkus J, Záveská Drábková L, Honys D, Schrumpfová PP. The plant Pontin and Reptin homologues, RuvBL1 and RuvBL2a, colocalize with TERT and TRB proteins in vivo, and participate in telomerase biogenesis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 98:195-212. [PMID: 30834599 DOI: 10.1111/tpj.14306] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 02/08/2019] [Accepted: 02/26/2019] [Indexed: 05/15/2023]
Abstract
Telomerase maturation and recruitment to telomeres is regulated by several telomerase- and telomere-associated proteins. Among a number of proteins, human Pontin and Reptin play critical roles in telomerase biogenesis. Here we characterized plant orthologues of Pontin and Reptin, RuvBL1 and RuvBL2a, respectively, and show association of Arabidopsis thaliana RuvBL1 (AtRuvBL1) with the catalytic subunit of telomerase (AtTERT) in the nucleolus in vivo. In contrast to mammals, interactions between AtTERT and AtRuvBL proteins in A. thaliana are not direct and they are rather mediated by one of the Arabidopsis thaliana Telomere Repeat Binding (AtTRB) proteins. We further show that plant orthologue of dyskerin, named AtCBF5, is indirectly associated with AtTRB proteins but not with the AtRuvBL proteins in the plant nucleus/nucleolus, and interacts with the Protection of telomere 1 (AtPOT1a) in the nucleolus or cytoplasmic foci. Our genome-wide phylogenetic analyses identify orthologues in RuvBL protein family within the plant kingdom. Dysfunction of AtRuvBL genes in heterozygous T-DNA insertion A. thaliana mutants results in reduced telomerase activity and indicate the involvement of AtRuvBL in plant telomerase biogenesis.
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Affiliation(s)
- Šárka Schořová
- Laboratory of Functional Genomics and Proteomics, National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Jiří Fajkus
- Laboratory of Functional Genomics and Proteomics, National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno, Czech Republic
- Mendel Centre for Plant Genomics and Proteomics, Central European Institute of Technology, Masaryk University, Brno, Czech Republic
- Institute of Biophysics of the Czech Academy of Sciences, v.v.i., Brno, Czech Republic
| | - Lenka Záveská Drábková
- Laboratory of Pollen Biology, Institute of Experimental Botany of the Czech Academy of Sciences, v.v.i., Prague, Czech Republic
| | - David Honys
- Laboratory of Pollen Biology, Institute of Experimental Botany of the Czech Academy of Sciences, v.v.i., Prague, Czech Republic
| | - Petra Procházková Schrumpfová
- Laboratory of Functional Genomics and Proteomics, National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno, Czech Republic
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Delom F, Nazaraliyev A, Fessart D. The role of protein disulphide isomerase AGR2 in the tumour niche. Biol Cell 2018; 110:271-282. [DOI: 10.1111/boc.201800024] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 08/21/2018] [Accepted: 09/06/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Frederic Delom
- University of Bordeaux; INSERM U1218; Bordeaux F-33000 France
- Institut Bergonié, Comprehensive Cancer Centre; Bordeaux F-33076 France
| | - Amal Nazaraliyev
- University of Bordeaux; INSERM U1218; Bordeaux F-33000 France
- Institut Bergonié, Comprehensive Cancer Centre; Bordeaux F-33076 France
| | - Delphine Fessart
- INSERM U1242; “Chemistry, Oncogenesis, Stress, Signaling”; Université; de Rennes 1; Rennes France
- Centre de Lutte Contre le Cancer Eugène Marquis; Rennes France
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35
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Mikesch JH, Schwammbach D, Hartmann W, Schmidt L, Schliemann C, Angenendt L, Wiewrodt R, Marra A, Thoennissen NH, Wardelmann E, Köhler G, Lenz G, Müller-Tidow C, Berdel WE, Arteaga MF. Reptin drives tumour progression and resistance to chemotherapy in nonsmall cell lung cancer. Eur Respir J 2018; 52:13993003.01637-2017. [DOI: 10.1183/13993003.01637-2017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 05/19/2018] [Indexed: 11/05/2022]
Abstract
While targeted nonsmall cell lung cancer (NSCLC) therapies have improved the outcome of defined disease subtypes, prognosis for most patients remains poor. We found the AAA+ ATPase Reptin to be highly expressed in the vast majority of 278 NSCLC tumour samples. Thus, the objective of the study was to assess the role of Reptin in NSCLC.Survival analyses of 1145 NSCLC patients revealed that high RNA expression levels of Reptin are associated with adverse outcome. Knockdown of Reptin in human NSCLC cells impaired growth ex vivo and eliminated engraftment in a xenograft model. Reptin directly interacted with histone deacetylase 1 (HDAC1) as the critical mechanism driving NSCLC tumour progression. Pharmacological disruption of the Reptin/HDAC1 complex resulted in a substantial decrease in NSCLC cell proliferation and induced significant sensitisation to cisplatin.Our results identify Reptin as a novel independent prognostic factor and as a key regulator mediating proliferation and clonal growth of human NSCLC cells ex vivo and in vivo. We unveil a Reptin/HDAC1 protein complex whose pharmacological disruption sensitises NSCLC cells to cisplatin, suggesting this approach for application in clinical trials.
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Pontin Acts as a Potential Biomarker for Poor Clinical Outcome and Promotes Tumor Invasion in Hilar Cholangiocarcinoma. BIOMED RESEARCH INTERNATIONAL 2018; 2018:6135016. [PMID: 29862278 PMCID: PMC5971300 DOI: 10.1155/2018/6135016] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 03/07/2018] [Accepted: 04/05/2018] [Indexed: 12/16/2022]
Abstract
Hilar cholangiocarcinoma (HC) is a devastating malignancy that carries a poor overall prognosis. As a member of the AAA+ superfamily, Pontin becomes highly expressed in several malignant tumors, which contributes to tumor progression and influences tumor prognosis. In our research, Pontin expression in tumor specimens resected from 86 HC patients was detected by immunohistochemistry. Interestingly, high expression of Pontin was significantly associated with lymph node metastasis (p = 0.011) and tumor node metastasis (TNM) stage (p = 0.005). The Kaplan–Meier overall survival rate and multivariate analyses were performed to evaluate the prognosis of patients with HC. Patients with high Pontin expression had significantly poorer overall survival outcomes. Multivariate analyses found that Pontin was an independent prognostic factor (p = 0.001). Moreover, bioinformatics analysis confirmed the increase in Pontin mRNA expression levels in cholangiocarcinoma tissues. In addition, in vitro experiments showed that Pontin expression was inhibited at the mRNA as well as protein levels after transfection with Pontin siRNA in human cholangiocarcinoma cell lines. Moreover, significant suppression of cell invasion was observed after the downregulation of Pontin. Taken together, the present study suggested that Pontin could act as a potential prognostic predictor, which might be a new valuable molecular candidate for the prevention and treatment of HC.
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Breig O, Yates M, Neaud V, Couchy G, Grigoletto A, Lucchesi C, Prox J, Zucman-Rossi J, Becker-Pauly C, Rosenbaum J. Metalloproteinase meprin α regulates migration and invasion of human hepatocarcinoma cells and is a mediator of the oncoprotein Reptin. Oncotarget 2018; 8:7839-7851. [PMID: 27999200 PMCID: PMC5352365 DOI: 10.18632/oncotarget.13975] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 11/30/2016] [Indexed: 01/13/2023] Open
Abstract
Hepatocellular carcinoma is associated with a high rate of intra-hepatic invasion that carries a poor prognosis. Meprin alpha (Mep1A) is a secreted metalloproteinase with many substrates relevant to cancer invasion. We found that Mep1A was a target of Reptin, a protein that is oncogenic in HCC. We studied Mep1A regulation by Reptin, its role in HCC, and whether it mediates Reptin oncogenic effects. MepA and Reptin expression was measured in human HCC by qRT-PCR and in cultured cells by PCR, western blot and enzymatic activity measurements. Cell growth was assessed by counting and MTS assay. Cell migration was measured in Boyden chambers and wound healing assays, and cell invasion in Boyden chambers. Silencing Reptin decreased Mep1A expression and activity, without affecting meprin β. Mep1A, but not meprin β, was overexpressed in a series of 242 human HCC (2.04 fold, p < 0.0001), and a high expression correlated with a poor prognosis. Mep1A and Reptin expressions were positively correlated (r = 0.39, p < 0.0001). Silencing Mep1A had little effect on cell proliferation, but decreased cell migration and invasion of HuH7 and Hep3B cells. Conversely, overexpression of Mep1A or addition of recombinant Mep1A increased migration and invasion. Finally, overexpression of Mep1A restored a normal cell migration in cells where Reptin was depleted. Mep1A is overexpressed in most HCC and induces HCC cell migration and invasion. Mep1A expression is regulated by Reptin, and Mep1A mediates Reptin-induced migration. Overall, we suggest that Mep1A may be a useful target in HCC.
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Affiliation(s)
- Osman Breig
- University Bordeaux, INSERM, U1053, BordeAux Research in Translational Oncology, BaRITOn, Bordeaux, France
| | - Maïlyn Yates
- University Bordeaux, INSERM, U1053, BordeAux Research in Translational Oncology, BaRITOn, Bordeaux, France
| | - Véronique Neaud
- University Bordeaux, INSERM, U1053, BordeAux Research in Translational Oncology, BaRITOn, Bordeaux, France
| | - Gabrielle Couchy
- Inserm, U1162, Génomique Fonctionnelle des Tumeurs Solides, Université Paris Diderot, Université Paris Descartes, Université Paris 13, Paris, France
| | - Aude Grigoletto
- University Bordeaux, INSERM, U1053, BordeAux Research in Translational Oncology, BaRITOn, Bordeaux, France
| | | | - Johannes Prox
- Unit for Degradomics of the Protease Web, University of Kiel, Germany
| | - Jessica Zucman-Rossi
- Inserm, U1162, Génomique Fonctionnelle des Tumeurs Solides, Université Paris Diderot, Université Paris Descartes, Université Paris 13, Paris, France
| | | | - Jean Rosenbaum
- University Bordeaux, INSERM, U1053, BordeAux Research in Translational Oncology, BaRITOn, Bordeaux, France
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Mao YQ, Houry WA. The Role of Pontin and Reptin in Cellular Physiology and Cancer Etiology. Front Mol Biosci 2017; 4:58. [PMID: 28884116 PMCID: PMC5573869 DOI: 10.3389/fmolb.2017.00058] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 08/03/2017] [Indexed: 12/29/2022] Open
Abstract
Pontin (RUVBL1, TIP49, TIP49a, Rvb1) and Reptin (RUVBL2, TIP48, TIP49b, Rvb2) are highly conserved ATPases of the AAA+ (ATPases Associated with various cellular Activities) superfamily and are involved in various cellular processes that are important for oncogenesis. First identified as being upregulated in hepatocellular carcinoma and colorectal cancer, their overexpression has since been shown in multiple cancer types such as breast, lung, gastric, esophageal, pancreatic, kidney, bladder as well as lymphatic, and leukemic cancers. However, their exact functions are still quite unknown as they interact with many molecular complexes with vastly different downstream effectors. Within the nucleus, Pontin and Reptin participate in the TIP60 and INO80 complexes important for chromatin remodeling. Although not transcription factors themselves, Pontin and Reptin modulate the transcriptional activities of bona fide proto-oncogenes such as MYC and β-catenin. They associate with proteins involved in DNA damage repair such as PIKK complexes as well as with the core complex of Fanconi anemia pathway. They have also been shown to be important for cell cycle progression, being involved in assembly of telomerase, mitotic spindle, RNA polymerase II, and snoRNPs. When the two ATPases localize to the cytoplasm, they were reported to promote cancer cell invasion and metastasis. Due to their various roles in carcinogenesis, it is not surprising that Pontin and Reptin are proving to be important biomarkers for diagnosis and prognosis of various cancers. They are also current targets for the development of new therapeutic anticancer drugs.
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Affiliation(s)
- Yu-Qian Mao
- Department of Biochemistry, University of TorontoToronto, ON, Canada
| | - Walid A Houry
- Department of Biochemistry, University of TorontoToronto, ON, Canada.,Department of Chemistry, University of TorontoToronto, ON, Canada
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Raymond AA, Javary J, Breig O, Neaud V, Rosenbaum J. Reptin regulates insulin-stimulated Akt phosphorylation in hepatocellular carcinoma via the regulation of SHP-1/PTPN6. Cell Biochem Funct 2017; 35:289-295. [DOI: 10.1002/cbf.3274] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 06/22/2017] [Accepted: 07/03/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Anne-Aurélie Raymond
- University of Bordeaux; INSERM, U1053, Bordeaux Research In Translational Oncology, BaRITOn; Bordeaux France
| | - Joaquim Javary
- University of Bordeaux; INSERM, U1053, Bordeaux Research In Translational Oncology, BaRITOn; Bordeaux France
| | - Osman Breig
- University of Bordeaux; INSERM, U1053, Bordeaux Research In Translational Oncology, BaRITOn; Bordeaux France
| | - Véronique Neaud
- University of Bordeaux; INSERM, U1053, Bordeaux Research In Translational Oncology, BaRITOn; Bordeaux France
| | - Jean Rosenbaum
- University of Bordeaux; INSERM, U1053, Bordeaux Research In Translational Oncology, BaRITOn; Bordeaux France
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Tammana D, Tammana TVS. Human DNA helicase, RuvBL1 and its Chlamydomonas homologue, CrRuvBL1 plays an important role in ciliogenesis. Cytoskeleton (Hoboken) 2017; 74:251-259. [PMID: 28574207 DOI: 10.1002/cm.21377] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 05/18/2017] [Accepted: 05/22/2017] [Indexed: 01/23/2023]
Abstract
Several nuclear and nucleic acid-binding proteins were detected in the proteomic analyses of ciliary fractions from various organisms. Yet very little is known about the role of these proteins in ciliogenesis and ciliary signaling. In an attempt to characterize the role of these nuclear proteins, we identified a hypothetical protein from Chlamydomonas reinhardtii, CrRuvBL1, which is homologous to human DNA helicase, HsRuvBL1. CrRuvBL1 localizes to flagella and nucleus in vegetative Chlamydomonas cells. It accumulates in the nucleus specifically during initial stages of flagellar assembly and cell division indicating its role in these processes. Mammalian counterpart of this protein, HsRuvBL1, was found to be present at the basal bodies and in the primary cilium of quiescent Retinal Pigment Epithelial (RPE1) cells. In interphase cells, HsRuvBL1 is present at centrioles while the protein localizes on spindle fibers, spindle poles and midbodies, which are important structures formed during different phases of cell division. Depletion of HsRuvBL1 by using siRNAs leads to complete loss of primary cilia in RPE1 cells. Together these results suggest that nuclear proteins play an important role in ciliogenesis.
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Affiliation(s)
- Damayanti Tammana
- Institute of Bioinformatics and Applied Biotechnology (IBAB), Biotech Park, Electronic City, Phase 1, Bangalore, 560100, India
| | - Trinadh Venkata Satish Tammana
- Institute of Bioinformatics and Applied Biotechnology (IBAB), Biotech Park, Electronic City, Phase 1, Bangalore, 560100, India
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Zhang J, Jiang HY, Zhang LK, Xu WL, Qiao YT, Zhu XG, Liu W, Zheng QQ, Hua ZC. C-FLIP L Modulated Wnt/β-Catenin Activation via Association with TIP49 Protein. J Biol Chem 2016; 292:2132-2142. [PMID: 28028178 DOI: 10.1074/jbc.m116.753251] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 12/05/2016] [Indexed: 12/24/2022] Open
Abstract
Cellular FLICE-like inhibitory protein (c-FLIPL) is a key inhibitory protein in the extrinsic apoptotic pathway. Recent studies showed that c-FLIPL could translocate into the nucleus and might be involved in the Wnt signaling pathway. The nuclear function of c-FLIPL was still unclear. Here we found a novel c-FLIPL-associated protein TIP49, which is a nuclear protein identified as a cofactor in the transcriptional regulation of β-catenin. They had co-localization in the nucleus and the DED domain of c-FLIPL was required for the association with TIP49. By performing ChIP experiments, C-FLIPL was detected in the ITF-2 locus and facilitated TIP49 accumulation in the formation of complexes at the T-cell-specific transcription factor site of human ITF-2 promoter. When TIP49 knockdown, c-FLIPL-driven Wnt activation, and cell proliferation were inhibited, suggesting that a role of nuclear c-FLIPL involved in modulation of the Wnt pathway was in a TIP49-dependent manner. Elevated expression of c-FLIPL and TIP49 that coincided in human lung cancers were analyzed in silico using the Oncomine database. Their high expressions were reconfirmed in six lung cancer cell lines and correlated with cell growth. The association of c-FLIPL and TIP49 provided an additional mechanism involved in c-FLIPL-mediated functions, including Wnt activation.
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Affiliation(s)
- Jing Zhang
- From The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, Jiangsu and .,the Changzhou High-Tech Research Institute of Nanjing University and Jiangsu Target Pharma Laboratories Inc., Changzhou 213164, Jiangsu, People's Republic of China
| | - Heng-Yi Jiang
- From The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, Jiangsu and
| | - Lin-Kai Zhang
- From The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, Jiangsu and
| | - Wen-Ling Xu
- From The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, Jiangsu and
| | - Yi-Ting Qiao
- From The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, Jiangsu and
| | - Xu-Guo Zhu
- From The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, Jiangsu and
| | - Wan Liu
- From The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, Jiangsu and
| | - Qian-Qian Zheng
- From The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, Jiangsu and
| | - Zi-Chun Hua
- From The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, Jiangsu and .,the Changzhou High-Tech Research Institute of Nanjing University and Jiangsu Target Pharma Laboratories Inc., Changzhou 213164, Jiangsu, People's Republic of China
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42
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Hong S, Jo J, Kim HJ, Lee JE, Shin DH, Lee SG, Baek A, Shim SH, Lee DR. RuvB-Like Protein 2 (Ruvbl2) Has a Role in Directing the Neuroectodermal Differentiation of Mouse Embryonic Stem Cells. Stem Cells Dev 2016; 25:1376-85. [DOI: 10.1089/scd.2016.0076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Soomin Hong
- Department of Biomedical Science, College of Life Science, CHA University, Seongnam, Korea
| | - Junghyun Jo
- Department of Biomedical Science, College of Life Science, CHA University, Seongnam, Korea
| | - Hyung Joon Kim
- Fertility Center, CHA Gangnam Medical Center, College of Medicine, CHA University, Seoul, Korea
| | | | - Dong Hyuk Shin
- Fertility Center, CHA Gangnam Medical Center, College of Medicine, CHA University, Seoul, Korea
| | - Sung-Geum Lee
- CHA Stem Cell Institute, CHA University, Seoul, Korea
| | - Ahmi Baek
- Fertility Center, CHA Gangnam Medical Center, College of Medicine, CHA University, Seoul, Korea
| | - Sung Han Shim
- Department of Biomedical Science, College of Life Science, CHA University, Seongnam, Korea
- Fertility Center, CHA Gangnam Medical Center, College of Medicine, CHA University, Seoul, Korea
| | - Dong Ryul Lee
- Department of Biomedical Science, College of Life Science, CHA University, Seongnam, Korea
- Fertility Center, CHA Gangnam Medical Center, College of Medicine, CHA University, Seoul, Korea
- CHA Stem Cell Institute, CHA University, Seoul, Korea
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Abstract
Telomerase activity is responsible for the maintenance of chromosome end structures (telomeres) and cancer cell immortality in most human malignancies, making telomerase an attractive therapeutic target. The rationale for targeting components of the telomerase holoenzyme has been strengthened by accumulating evidence indicating that these molecules have extra-telomeric functions in tumour cell survival and proliferation. This Review discusses current knowledge of the biogenesis, structure and multiple functions of telomerase-associated molecules intertwined with recent advances in drug discovery approaches. We also describe the fertile ground available for the pursuit of next-generation small-molecule inhibitors of telomerase.
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Affiliation(s)
- Greg M Arndt
- Australian Cancer Research Foundation (ACRF) Drug Discovery Centre for Childhood Cancer, Children's Cancer Institute Australia, Lowy Cancer Research Centre, University of New South Wales, Randwick, New South Wales 2031, Australia
| | - Karen L MacKenzie
- Personalised Medicine Program, Children's Cancer Institute Australia, Lowy Cancer Research Centre, University of New South Wales, Randwick, New South Wales 2031, Australia
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Cindric Vranesic A, Reiche J, Hoischen C, Wohlmann A, Bratsch J, Friedrich K, Günes B, Cappallo-Obermann H, Kirchhoff C, Diekmann S, Günes C, Huber O. Characterization of SKAP/kinastrin isoforms: the N-terminus defines tissue specificity and Pontin binding. Hum Mol Genet 2016; 25:2838-2852. [PMID: 27170314 DOI: 10.1093/hmg/ddw140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 04/29/2016] [Accepted: 04/29/2016] [Indexed: 11/14/2022] Open
Abstract
Small Kinetochore-Associated Protein (SKAP)/Kinastrin is a multifunctional protein with proposed roles in mitosis, apoptosis and cell migration. Exact mechanisms underlying its activities in these cellular processes are not completely understood. SKAP is predicted to have different isoforms, however, previous studies did not differentiate between them. Since distinct molecular architectures of protein isoforms often influence their localization and functions, this study aimed to examine the expression profile and functional differences between SKAP isoforms in human and mouse. Analyses of various human tissues and cells of different origin by RT-PCR, and by Western blotting and immunocytochemistry applying newly generated anti-SKAP monoclonal antibodies revealed that human SKAP exists in two protein isoforms: ubiquitously expressed SKAP16 and testis/sperm-specific SKAP1. In mouse, SKAP1 expression is detectable in testis at 4 weeks postnatally, when the first wave of spermatogenesis in mice is complete and the elongated spermatids are present in the testes. Furthermore, we identified Pontin as a new SKAP1 interaction partner. SKAP1 and Pontin co-localized in the flagellar region of human sperm suggesting a functional relevance for SKAP1-Pontin interaction in sperm motility. Since most previous studies on SKAP were performed with the testis-specific isoform SKAP1, our findings provide a new basis for future studies on the role of SKAP in both human somatic cells and male germ cells, including studies on male fertility.
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Affiliation(s)
| | - Juliane Reiche
- Department of Biochemistry II, Jena University Hospital, 07743 Jena, Germany
| | - Christian Hoischen
- Leibniz Institute on Aging - Fritz Lipmann Institute e.V. Jena, 07745 Jena, Germany
| | - Andreas Wohlmann
- Department of Biochemistry II, Jena University Hospital, 07743 Jena, Germany
| | - Jens Bratsch
- Department of Biochemistry II, Jena University Hospital, 07743 Jena, Germany
| | - Karlheinz Friedrich
- Department of Biochemistry II, Jena University Hospital, 07743 Jena, Germany
| | - Berkay Günes
- Leibniz Institute on Aging - Fritz Lipmann Institute e.V. Jena, 07745 Jena, Germany
| | | | - Christiane Kirchhoff
- Department of Andrology, University Hospital Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Stephan Diekmann
- Leibniz Institute on Aging - Fritz Lipmann Institute e.V. Jena, 07745 Jena, Germany
| | - Cagatay Günes
- Department of Urology, University Hospital Ulm, 89075 Ulm, Germany
| | - Otmar Huber
- Department of Biochemistry II, Jena University Hospital, 07743 Jena, Germany
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The TIP60 Complex Is a Conserved Coactivator of HIF1A. Cell Rep 2016; 16:37-47. [PMID: 27320910 DOI: 10.1016/j.celrep.2016.05.082] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 03/09/2016] [Accepted: 05/19/2016] [Indexed: 12/17/2022] Open
Abstract
Hypoxia-inducible factors (HIFs) are critical regulators of the cellular response to hypoxia. Despite their established roles in normal physiology and numerous pathologies, the molecular mechanisms by which they control gene expression remain poorly understood. We report here a conserved role for the TIP60 complex as a HIF1 transcriptional cofactor in Drosophila and human cells. TIP60 (KAT5) is required for HIF1-dependent gene expression in fly cells and embryos and colorectal cancer cells. HIF1A interacts with and recruits TIP60 to chromatin. TIP60 is dispensable for HIF1A association with its target genes but is required for HIF1A-dependent chromatin modification and RNA polymerase II activation in hypoxia. In human cells, global analysis of HIF1A-dependent gene activity reveals that most HIF1A targets require either TIP60, the CDK8-Mediator complex, or both as coactivators for full expression in hypoxia. Thus, HIF1A employs functionally diverse cofactors to regulate different subsets of genes within its transcriptional program.
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Wang WM, Liu PQ, Xu YJ, Xiao S. Protein trafficking during plant innate immunity. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2016; 58:284-98. [PMID: 26345282 DOI: 10.1111/jipb.12426] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 09/06/2015] [Indexed: 05/20/2023]
Abstract
Plants have evolved a sophisticated immune system to fight against pathogenic microbes. Upon detection of pathogen invasion by immune receptors, the immune system is turned on, resulting in production of antimicrobial molecules including pathogenesis-related (PR) proteins. Conceivably, an efficient immune response depends on the capacity of the plant cell's protein/membrane trafficking network to deploy the right defense-associated molecules in the right place at the right time. Recent research in this area shows that while the abundance of cell surface immune receptors is regulated by endocytosis, many intracellular immune receptors, when activated, are partitioned between the cytoplasm and the nucleus for induction of defense genes and activation of programmed cell death, respectively. Vesicle transport is an essential process for secretion of PR proteins to the apoplastic space and targeting of defense-related proteins to the plasma membrane or other endomembrane compartments. In this review, we discuss the various aspects of protein trafficking during plant immunity, with a focus on the immunity proteins on the move and the major components of the trafficking machineries engaged.
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Affiliation(s)
- Wen-Ming Wang
- Rice Research Institute & Key Laboratory for Major Crop Diseases, Sichuan Agricultural University, Chengdu, 611130, China
| | - Peng-Qiang Liu
- Rice Research Institute & Key Laboratory for Major Crop Diseases, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yong-Ju Xu
- Rice Research Institute & Key Laboratory for Major Crop Diseases, Sichuan Agricultural University, Chengdu, 611130, China
| | - Shunyuan Xiao
- Institute for Bioscience and Biotechnology Research & Department of Plant Science and Landscape Architecture, University of Maryland, Rockville, MD, 20850, USA
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47
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Reptin physically interacts with p65 and represses NF-κB activation. FEBS Lett 2015; 589:1951-7. [PMID: 25957047 DOI: 10.1016/j.febslet.2015.04.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 04/11/2015] [Accepted: 04/15/2015] [Indexed: 11/22/2022]
Abstract
Reptin and Pontin belong to the AAA+ ATPase family of DNA helicases. Both proteins are present in several chromatin-remodeling machineries and are involved in transcriptional regulation, DNA repair, and telomerase activity, but they also function independently from each other. Here we report the identification of p65 as an interacting partner of Reptin. Using reporter gene assays, we show Reptin inhibits NF-κB transactivation after TNFα stimulation. Reptin is mainly localized in the cytoplasm and impedes NF-κB activation by inhibiting IκB-α degradation and restraining p65 nuclear translocation. These results reveal a novel mechanism for the control of NF-κB pathway by cytoplasmic Reptin.
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48
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Matias PM, Baek SH, Bandeiras TM, Dutta A, Houry WA, Llorca O, Rosenbaum J. The AAA+ proteins Pontin and Reptin enter adult age: from understanding their basic biology to the identification of selective inhibitors. Front Mol Biosci 2015; 2:17. [PMID: 25988184 PMCID: PMC4428354 DOI: 10.3389/fmolb.2015.00017] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Accepted: 04/19/2015] [Indexed: 11/13/2022] Open
Abstract
Pontin and Reptin are related partner proteins belonging to the AAA+ (ATPases Associated with various cellular Activities) family. They are implicated in multiple and seemingly unrelated processes encompassing the regulation of gene transcription, the remodeling of chromatin, DNA damage sensing and repair, and the assembly of protein and ribonucleoprotein complexes, among others. The 2nd International Workshop on Pontin and Reptin took place at the Instituto de Tecnologia Química e Biológica António Xavier in Oeiras, Portugal on October 10-12, 2014, and reported significant new advances on the mechanisms of action of these two AAA+ ATPases. The major points under discussion were related to the mechanisms through which these proteins regulate gene transcription, their roles as co-chaperones, and their involvement in pathophysiology, especially in cancer and ciliary biology and disease. Finally, they may become anticancer drug targets since small chemical inhibitors were shown to produce anti-tumor effects in animal models.
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Affiliation(s)
- Pedro M Matias
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa Oeiras, Portugal ; Instituto de Biologia Experimental e Tecnológica Oeiras, Portugal
| | - Sung Hee Baek
- Creative Research Initiative Center for Chromatin Dynamics, School of Biological Sciences, Seoul National University Seoul, South Korea
| | | | - Anindya Dutta
- Department of Biochemistry and Molecular Genetics, University of Virginia Charlottesville, VA, USA
| | - Walid A Houry
- Department of Biochemistry, University of Toronto Toronto, ON, Canada
| | - Oscar Llorca
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas (Spanish National Research Council, CSIC) Madrid, Spain
| | - Jean Rosenbaum
- INSERM, U1053 Bordeaux, France ; Groupe de Recherches pour l'Etude du Foie, Université de Bordeaux Bordeaux, France
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49
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Boo K, Bhin J, Jeon Y, Kim J, Shin HJR, Park JE, Kim K, Kim CR, Jang H, Kim IH, Kim VN, Hwang D, Lee H, Baek SH. Pontin functions as an essential coactivator for Oct4-dependent lincRNA expression in mouse embryonic stem cells. Nat Commun 2015; 6:6810. [PMID: 25857206 PMCID: PMC4403444 DOI: 10.1038/ncomms7810] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Accepted: 02/27/2015] [Indexed: 01/05/2023] Open
Abstract
The actions of transcription factors, chromatin modifiers and noncoding RNAs are crucial for the programming of cell states. Although the importance of various epigenetic machineries for controlling pluripotency of embryonic stem (ES) cells has been previously studied, how chromatin modifiers cooperate with specific transcription factors still remains largely elusive. Here, we find that Pontin chromatin remodelling factor plays an essential role as a coactivator for Oct4 for maintenance of pluripotency in mouse ES cells. Genome-wide analyses reveal that Pontin and Oct4 share a substantial set of target genes involved in ES cell maintenance. Intriguingly, we find that the Oct4-dependent coactivator function of Pontin extends to the transcription of large intergenic noncoding RNAs (lincRNAs) and in particular linc1253, a lineage programme repressing lincRNA, is a Pontin-dependent Oct4 target lincRNA. Together, our findings demonstrate that the Oct4-Pontin module plays critical roles in the regulation of genes involved in ES cell fate determination. Long non-coding RNAs or lincRNAs identified in embryonic stem (ES) cells have been shown to regulate ES cell states; however, how these lincRNAs are regulated remains unclear. Here the authors show that the transcriptional coactivator Pontin regulates the expression of lincRNAs involved in ES cell maintenance in an Oct4-dependent manner.
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Affiliation(s)
- Kyungjin Boo
- Creative Research Initiative Center for Chromatin Dynamics, School of Biological Sciences, Seoul National University, Seoul 151-742, South Korea
| | - Jinhyuk Bhin
- Department of Chemical Engineering, POSTECH, Pohang 790-784, South Korea
| | - Yoon Jeon
- Research Institute, Graduate School of Cancer Science and Policy, National Cancer Center, Gyeonggi-do 410-769, South Korea
| | - Joomyung Kim
- Creative Research Initiative Center for Chromatin Dynamics, School of Biological Sciences, Seoul National University, Seoul 151-742, South Korea
| | - Hi-Jai R Shin
- Creative Research Initiative Center for Chromatin Dynamics, School of Biological Sciences, Seoul National University, Seoul 151-742, South Korea
| | - Jong-Eun Park
- Institute for Basic Science, School of Biological Sciences, Seoul National University, Seoul 151-742, South Korea
| | - Kyeongkyu Kim
- Creative Research Initiative Center for Chromatin Dynamics, School of Biological Sciences, Seoul National University, Seoul 151-742, South Korea
| | - Chang Rok Kim
- Creative Research Initiative Center for Chromatin Dynamics, School of Biological Sciences, Seoul National University, Seoul 151-742, South Korea
| | - Hyonchol Jang
- Research Institute, Graduate School of Cancer Science and Policy, National Cancer Center, Gyeonggi-do 410-769, South Korea
| | - In-Hoo Kim
- Research Institute, Graduate School of Cancer Science and Policy, National Cancer Center, Gyeonggi-do 410-769, South Korea
| | - V Narry Kim
- Institute for Basic Science, School of Biological Sciences, Seoul National University, Seoul 151-742, South Korea
| | - Daehee Hwang
- 1] Department of Chemical Engineering, POSTECH, Pohang 790-784, South Korea [2] Department of New Biology and Center for Plant Aging Research, Institute for Basic Science, DGIST, Daegu 711-873, South Korea
| | - Ho Lee
- Research Institute, Graduate School of Cancer Science and Policy, National Cancer Center, Gyeonggi-do 410-769, South Korea
| | - Sung Hee Baek
- Creative Research Initiative Center for Chromatin Dynamics, School of Biological Sciences, Seoul National University, Seoul 151-742, South Korea
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Zhang X, Ren J, Yan L, Tang Y, Zhang W, Li D, Zang Y, Kong F, Xu Z. Cytoplasmic expression of pontin in renal cell carcinoma correlates with tumor invasion, metastasis and patients' survival. PLoS One 2015; 10:e0118659. [PMID: 25751257 PMCID: PMC4353622 DOI: 10.1371/journal.pone.0118659] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 01/08/2015] [Indexed: 11/23/2022] Open
Abstract
Renal cell carcinoma (RCC) is the most lethal of all genitourinary malignancies. Distant metastasis represents the major cause of death in patients with RCC. Recent studies have implicated the AAA+ ATPase pontin in many cellular activities that are highly relevant to carcinogenesis. In this study, we demonstrate for the first time that pontin was up-regulated in RCC, and plays a previously unknown pro-invasive role in the metastatic progression of RCC through epithelial-to-mesenchymal transition (EMT) pathway. 28 pairs of freshly frozen clear cell RCC samples and the matched normal renal tissues analyzed by quantitative RT-PCR and western blotting demonstrated that pontin was up-regulated in clear cell RCC tissues than in normal renal tissues. In addition, immunohistochemistry was used to evaluate subcellular pontin expression in 95 RCC patients, and found that overexpression of pontin in cytoplasm positively correlated with the metastatic features, predicting unfavorable outcomes of RCC patients. Furthermore, in vitro experiments show pontin was predominantly expressed in cytoplasm of RCC cell lines, and a significant suppression of cell migration and invasion in pontin siRNA treated RCC cell lines was observed. Mechanistic studies show that pontin depletion up-regulated the E-cadherin protein and down-regulated vimentin protein, and decreased nuclear β-catenin expression, suggesting the involvement of EMT in pontin induced metastatic progression. Together, our data suggest pontin as a potential prognostic biomarker in RCC, and provide new promising therapeutic targets for clinical intervention of kidney cancers.
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Affiliation(s)
- Xiang Zhang
- Department of Urology, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
- Institute of Basic Medical Science and Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Juchao Ren
- Department of Urology, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
- Institute of Basic Medical Science and Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
- * E-mail: (JR); (ZX)
| | - Lei Yan
- Department of Urology, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Yueqing Tang
- Department of Urology, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Wenhua Zhang
- Department of Urology, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Dawei Li
- Department of Urology, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Yuanwei Zang
- Department of Urology, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
- Institute of Basic Medical Science and Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Feng Kong
- Central Laboratory, Shandong University Second Hospital, Shandong University, Jinan, Shandong Province, China
| | - Zhonghua Xu
- Department of Urology, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
- * E-mail: (JR); (ZX)
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