1
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Ka HI, Cho M, Kwon SH, Mun SH, Han S, Kim MJ, Yang Y. IK is essentially involved in ciliogenesis as an upstream regulator of oral-facial-digital syndrome ciliopathy gene, ofd1. Cell Biosci 2023; 13:195. [PMID: 37898820 PMCID: PMC10612314 DOI: 10.1186/s13578-023-01146-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 10/12/2023] [Indexed: 10/30/2023] Open
Abstract
BACKGROUND The cilia are microtubule-based organelles that protrude from the cell surface. Abnormalities in cilia result in various ciliopathies, including polycystic kidney disease (PKD), Bardet-Biedl syndrome (BBS), and oral-facial-digital syndrome type I (OFD1), which show genetic defects associated with cilia formation. Although an increasing number of human diseases is attributed to ciliary defects, the functions or regulatory mechanisms of several ciliopathy genes remain unclear. Because multi ciliated cells (MCCs) are especially deep in vivo, studying ciliogenesis is challenging. Here, we demonstrate that ik is essential for ciliogenesis in vivo. RESULTS In the absence of ik, zebrafish embryos showed various ciliopathy phenotypes, such as body curvature, abnormal otoliths, and cyst formation in the kidney. RNA sequencing analysis revealed that ik positively regulated ofd1 expression required for cilium assembly. In fact, depletion of ik resulted in the downregulation of ofd1 expression with ciliary defects, and these ciliary defects in ik mutants were rescued by restoring ofd1 expression. Interestingly, ik affected ciliogenesis particularly in the proximal tubule but not in the distal tubule in the kidney. CONCLUSIONS This study demonstrates the role of ik in ciliogenesis in vivo for the first time. Loss of ik in zebrafish embryos displays various ciliopathy phenotypes with abnormal ciliary morphology in ciliary tissues. Our findings on the ik-ofd1 axis provide new insights into the biological function of ik in clinical ciliopathy studies in humans.
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Affiliation(s)
- Hye In Ka
- Research Institute of Women's Health, Sookmyung Women's University, Seoul, 04312, South Korea
- Chronic and Metabolic Diseases Research Center, Sookmyung Women's University, Seoul, 04312, South Korea
| | - Mina Cho
- Research Institute of Women's Health, Sookmyung Women's University, Seoul, 04312, South Korea
| | - Seung-Hae Kwon
- Seoul Center, Korea Basic Science Institute, Seoul, 02841, South Korea
| | - Se Hwan Mun
- Research Institute of Women's Health, Sookmyung Women's University, Seoul, 04312, South Korea
- Chronic and Metabolic Diseases Research Center, Sookmyung Women's University, Seoul, 04312, South Korea
| | - Sora Han
- Research Institute of Women's Health, Sookmyung Women's University, Seoul, 04312, South Korea
| | - Min Jung Kim
- Research Institute of Women's Health, Sookmyung Women's University, Seoul, 04312, South Korea.
- Department of Biological Sciences, Sookmyung Women's University, Seoul, 04312, South Korea.
| | - Young Yang
- Research Institute of Women's Health, Sookmyung Women's University, Seoul, 04312, South Korea.
- Chronic and Metabolic Diseases Research Center, Sookmyung Women's University, Seoul, 04312, South Korea.
- Department of Biological Sciences, Sookmyung Women's University, Seoul, 04312, South Korea.
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2
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Gao C, Han Y, Bai L, Wang Y, Xue F. IK: A novel cell mitosis regulator that contributes to carcinogenesis. Cell Biochem Funct 2021; 39:854-859. [PMID: 34250629 DOI: 10.1002/cbf.3660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 06/26/2021] [Accepted: 06/29/2021] [Indexed: 11/12/2022]
Abstract
Carcinogenesis is characterized by abnormal regulation of cell growth and cell death. IK is a novel cell mitosis regulator that may contribute to carcinogenesis. Previous studies showed that the loss of IK expression resulted in cell mitotic arrest and even cell death. Besides, IK can also inhibit the interferon gamma (IFN-γ)-induced expression of human leukocyte antigen (HLA) class II antigen, which is associated with tumour immune microenvironment. To gain insight into the current research progress regarding IK, we conducted a review and searched the limited literature on IK using PubMed or Web of Science. In this review, we discussed the possible biological functions and mechanisms of IK in cancer and its immune microenvironment. Future perspectives of IK were also mentioned to explore its clinical significance.
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Affiliation(s)
- Chao Gao
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Key Laboratory of Female Reproductive Health and Eugenics, Tianjin, China
| | - Yanyan Han
- Department of Pathology, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Lu Bai
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin, China.,Department of Gynecology and Obstetrics, Nankai University Affiliated Hospital (Tianjin Fourth Hospital), Tianjin, China
| | - Yingmei Wang
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Key Laboratory of Female Reproductive Health and Eugenics, Tianjin, China
| | - Fengxia Xue
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Key Laboratory of Female Reproductive Health and Eugenics, Tianjin, China
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3
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Gao C, Jin G, Forbes E, Mangala LS, Wang Y, Rodriguez-Aguayo C, Amero P, Bayraktar E, Yan Y, Lopez-Berestein G, Broaddus RR, Sood AK, Xue F, Zhang W. Inactivating Mutations of the IK Gene Weaken Ku80/Ku70-Mediated DNA Repair and Sensitize Endometrial Cancer to Chemotherapy. Cancers (Basel) 2021; 13:2487. [PMID: 34065218 PMCID: PMC8160817 DOI: 10.3390/cancers13102487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/05/2021] [Accepted: 05/17/2021] [Indexed: 11/17/2022] Open
Abstract
IK is a mitotic factor that promotes cell cycle progression. Our previous investigation of 271 endometrial cancer (EC) samples from the Cancer Genome Atlas (TCGA) dataset showed IK somatic mutations were enriched in a cluster of patients with high-grade and high-stage cancers, and this group had longer survival. This study provides insight into how IK somatic mutations contribute to EC pathophysiology. We analyzed the somatic mutational landscape of IK gene in 547 EC patients using expanded TCGA dataset. Co-immunoprecipitation and mass spectrometry were used to identify protein interactions. In vitro and in vivo experiments were used to evaluate IK's role in EC. The patients with IK-inactivating mutations had longer survival during 10-year follow-up. Frameshift and stop-gain were common mutations and were associated with decreased IK expression. IK knockdown led to enrichment of G2/M phase cells, inactivation of DNA repair signaling mediated by heterodimerization of Ku80 and Ku70, and sensitization of EC cells to cisplatin treatment. IK/Ku80 mutations were accompanied by higher mutation rates and associated with significantly better overall survival. Inactivating mutations of IK gene and loss of IK protein expression were associated with weakened Ku80/Ku70-mediated DNA repair, increased mutation burden, and better response to chemotherapy in patients with EC.
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Affiliation(s)
- Chao Gao
- Department of Cancer Biology, Wake Forest Baptist Comprehensive Cancer Center, Winston-Salem, NC 27157, USA; (C.G.); (G.J.); (E.F.)
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin 300052, China; (Y.W.); (Y.Y.)
- Tianjin Key Laboratory of Female Reproductive Health and Eugenics, Tianjin 300052, China
| | - Guangxu Jin
- Department of Cancer Biology, Wake Forest Baptist Comprehensive Cancer Center, Winston-Salem, NC 27157, USA; (C.G.); (G.J.); (E.F.)
| | - Elizabeth Forbes
- Department of Cancer Biology, Wake Forest Baptist Comprehensive Cancer Center, Winston-Salem, NC 27157, USA; (C.G.); (G.J.); (E.F.)
| | - Lingegowda S. Mangala
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA; (L.S.M.); (E.B.); (A.K.S.)
- Center for RNA Interference and Non-Coding RNAs, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA; (C.R.-A.); (G.L.-B.)
| | - Yingmei Wang
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin 300052, China; (Y.W.); (Y.Y.)
- Tianjin Key Laboratory of Female Reproductive Health and Eugenics, Tianjin 300052, China
| | - Cristian Rodriguez-Aguayo
- Center for RNA Interference and Non-Coding RNAs, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA; (C.R.-A.); (G.L.-B.)
- Department of Experimental Therapeutics, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA;
| | - Paola Amero
- Department of Experimental Therapeutics, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA;
| | - Emine Bayraktar
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA; (L.S.M.); (E.B.); (A.K.S.)
- Center for RNA Interference and Non-Coding RNAs, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA; (C.R.-A.); (G.L.-B.)
| | - Ye Yan
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin 300052, China; (Y.W.); (Y.Y.)
- Tianjin Key Laboratory of Female Reproductive Health and Eugenics, Tianjin 300052, China
| | - Gabriel Lopez-Berestein
- Center for RNA Interference and Non-Coding RNAs, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA; (C.R.-A.); (G.L.-B.)
- Department of Experimental Therapeutics, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA;
| | - Russell R. Broaddus
- Department of Pathology & Laboratory Medicine, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA;
| | - Anil K. Sood
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA; (L.S.M.); (E.B.); (A.K.S.)
- Center for RNA Interference and Non-Coding RNAs, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA; (C.R.-A.); (G.L.-B.)
| | - Fengxia Xue
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin 300052, China; (Y.W.); (Y.Y.)
- Tianjin Key Laboratory of Female Reproductive Health and Eugenics, Tianjin 300052, China
| | - Wei Zhang
- Department of Cancer Biology, Wake Forest Baptist Comprehensive Cancer Center, Winston-Salem, NC 27157, USA; (C.G.); (G.J.); (E.F.)
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4
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Ka HI, Seo H, Choi Y, Kim J, Cho M, Choi SY, Park S, Han S, An J, Chung HS, Yang Y, Kim MJ. Loss of splicing factor IK impairs normal skeletal muscle development. BMC Biol 2021; 19:44. [PMID: 33789631 PMCID: PMC8015194 DOI: 10.1186/s12915-021-00980-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 02/11/2021] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND IK is a splicing factor that promotes spliceosome activation and contributes to pre-mRNA splicing. Although the molecular mechanism of IK has been previously reported in vitro, the physiological role of IK has not been fully understood in any animal model. Here, we generate an ik knock-out (KO) zebrafish using the CRISPR/Cas9 system to investigate the physiological roles of IK in vivo. RESULTS The ik KO embryos display severe pleiotropic phenotypes, implying an essential role of IK in embryonic development in vertebrates. RNA-seq analysis reveals downregulation of genes involved in skeletal muscle differentiation in ik KO embryos, and there exist genes having improper pre-mRNA splicing among downregulated genes. The ik KO embryos display impaired neuromuscular junction (NMJ) and fast-twitch muscle development. Depletion of ik reduces myod1 expression and upregulates pax7a, preventing normal fast muscle development in a non-cell-autonomous manner. Moreover, when differentiation is induced in IK-depleted C2C12 myoblasts, myoblasts show a reduced ability to form myotubes. However, inhibition of IK does not influence either muscle cell proliferation or apoptosis in zebrafish and C2C12 cells. CONCLUSION This study provides that the splicing factor IK contributes to normal skeletal muscle development in vivo and myogenic differentiation in vitro.
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Affiliation(s)
- Hye In Ka
- Department of Biological Sciences, Sookmyung Women's University, Seoul, 04310, Republic of Korea.,Research Institute of Women's Health, Sookmyung Women's University, Seoul, 04310, Republic of Korea
| | - Hyemin Seo
- Howard Hughes Medical Institute and Department of Molecular Biosciences, University of Texas at Austin, Austin, TX, 78712, USA
| | - Youngsook Choi
- Research Institute of Women's Health, Sookmyung Women's University, Seoul, 04310, Republic of Korea
| | - Joohee Kim
- Department of Biological Sciences, Sookmyung Women's University, Seoul, 04310, Republic of Korea
| | - Mina Cho
- Department of Biological Sciences, Sookmyung Women's University, Seoul, 04310, Republic of Korea
| | - Seok-Yong Choi
- Department of Biomedical Sciences, Chonnam National University Medical School, Hwasun, 58128, Republic of Korea
| | - Sujeong Park
- Department of Biological Sciences, Sookmyung Women's University, Seoul, 04310, Republic of Korea
| | - Sora Han
- Research Institute of Women's Health, Sookmyung Women's University, Seoul, 04310, Republic of Korea
| | - Jinsu An
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea.,Division of Bio-Medical Science and Technology, KIST School, University of Science and Technology (UST), Seoul, 02792, Republic of Korea
| | - Hak Suk Chung
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea.,Division of Bio-Medical Science and Technology, KIST School, University of Science and Technology (UST), Seoul, 02792, Republic of Korea
| | - Young Yang
- Department of Biological Sciences, Sookmyung Women's University, Seoul, 04310, Republic of Korea. .,Research Institute of Women's Health, Sookmyung Women's University, Seoul, 04310, Republic of Korea.
| | - Min Jung Kim
- Department of Biological Sciences, Sookmyung Women's University, Seoul, 04310, Republic of Korea.
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5
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Ka HI, Lee S, Han S, Jeong AL, Park JY, Joo HJ, Soh SJ, Park D, Yang Y. Deubiquitinase USP47-stabilized splicing factor IK regulates the splicing of ATM pre-mRNA. Cell Death Discov 2020; 6:34. [PMID: 32377397 PMCID: PMC7198525 DOI: 10.1038/s41420-020-0268-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 03/24/2020] [Accepted: 04/21/2020] [Indexed: 12/30/2022] Open
Abstract
IK depletion leads to an aberrant mitotic entry because of chromosomal misalignment through the enhancement of Aurora B activity at the interphase. Here, we demonstrate that IK, a spliceosomal component, plays a crucial role in the proper splicing of the ATM pre-mRNA among other genes related with the DNA Damage Response (DDR). Intron 1 in the ATM pre-mRNA, having lengths <200 bp, was not spliced in the IK-depleted cells and led to a deficiency of the ATM protein. Subsequently, the IK depletion-induced ATM protein deficiency impaired the ability to repair the damaged DNA. Because the absence of SMU1 results in IK degradation, the mechanism underlying IK degradation was exploited. IK was ubiquitinated in the absence of SMU1 and then subjected to proteolysis through the 26S proteasome. To prevent the proteolytic degradation of IK, a deubiquitinating enzyme, USP47, directly interacted with IK and stabilized it through deubiquitination. Collectively, our results suggest that IK is required for proper splicing of the ATM pre-mRNA and USP47 contributes toward the stabilization of IK.
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Affiliation(s)
- Hye In Ka
- Department of Biological Sciences, Sookmyung Women’s University, Seoul, 04310 Korea
| | - Sunyi Lee
- Drug Evaluation Group, R&D Center CJ HealthCare, Icheon, 04551 Korea
| | - Sora Han
- Research Institute of Women’s Health, Sookmyung Women’s University, Seoul, 04310 Korea
| | - Ae Lee Jeong
- New Drug Development Center, Osong Medical Innovation Foundation, Osong, 28160 Korea
| | - Ji Young Park
- Department of Biological Sciences, Sookmyung Women’s University, Seoul, 04310 Korea
| | - Hyun Jeong Joo
- Department of Biological Sciences, Sookmyung Women’s University, Seoul, 04310 Korea
| | - Su Jung Soh
- Department of Biological Sciences, Sookmyung Women’s University, Seoul, 04310 Korea
| | - Doyeon Park
- Department of Biological Sciences, Sookmyung Women’s University, Seoul, 04310 Korea
| | - Young Yang
- Department of Biological Sciences, Sookmyung Women’s University, Seoul, 04310 Korea
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6
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Keiper S, Papasaikas P, Will CL, Valcárcel J, Girard C, Lührmann R. Smu1 and RED are required for activation of spliceosomal B complexes assembled on short introns. Nat Commun 2019; 10:3639. [PMID: 31409787 PMCID: PMC6692369 DOI: 10.1038/s41467-019-11293-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 07/01/2019] [Indexed: 12/02/2022] Open
Abstract
Human pre-catalytic spliceosomes contain several proteins that associate transiently just prior to spliceosome activation and are absent in yeast, suggesting that this critical step is more complex in higher eukaryotes. We demonstrate via RNAi coupled with RNA-Seq that two of these human-specific proteins, Smu1 and RED, function both as alternative splicing regulators and as general splicing factors and are required predominantly for efficient splicing of short introns. In vitro splicing assays reveal that Smu1 and RED promote spliceosome activation, and are essential for this step when the distance between the pre-mRNA’s 5′ splice site (SS) and branch site (BS) is sufficiently short. This Smu1-RED requirement can be bypassed when the 5′ and 3′ regions of short introns are physically separated. Our observations suggest that Smu1 and RED relieve physical constraints arising from a short 5′SS-BS distance, thereby enabling spliceosomes to overcome structural challenges associated with the splicing of short introns. Human spliceosome components Smu1 and RED regulate alternative splicing. Here the authors show that Smu1 and RED are also required for constitutive splicing of short introns.
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Affiliation(s)
- Sandra Keiper
- Department of Cellular Biochemistry, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany
| | - Panagiotis Papasaikas
- Centre de Regulació Genòmica, The Barcelona Institute of Science and Technology and Universitat Pompeu Fabra, Dr. Aiguader 88, 08003, Barcelona, Spain.,Friedrich Miescher Institute for Biomedical Research (FMI), Maulbeerstrasse 66, 4058, Basel, Switzerland.,Swiss Institute of Bioinformatics, 4058, Basel, Switzerland
| | - Cindy L Will
- Department of Cellular Biochemistry, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany
| | - Juan Valcárcel
- Centre de Regulació Genòmica, The Barcelona Institute of Science and Technology and Universitat Pompeu Fabra, Dr. Aiguader 88, 08003, Barcelona, Spain.,Institució Catalana de Recerca i Estudis Avançats (ICREA), Pg. Lluís Companys, 08010, Barcelona, Spain
| | - Cyrille Girard
- Department of Cellular Biochemistry, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany.
| | - Reinhard Lührmann
- Department of Cellular Biochemistry, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany.
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7
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Verma A, Lee C, Morriss S, Odu F, Kenning C, Rizzo N, Spollen WG, Lin M, McRae AG, Givan SA, Hewezi T, Hussey R, Davis EL, Baum TJ, Mitchum MG. The novel cyst nematode effector protein 30D08 targets host nuclear functions to alter gene expression in feeding sites. THE NEW PHYTOLOGIST 2018; 219:697-713. [PMID: 29726613 DOI: 10.1111/nph.15179] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 03/15/2018] [Indexed: 05/29/2023]
Abstract
Cyst nematodes deliver effector proteins into host cells to manipulate cellular processes and establish a metabolically hyperactive feeding site. The novel 30D08 effector protein is produced in the dorsal gland of parasitic juveniles, but its function has remained unknown. We demonstrate that expression of 30D08 contributes to nematode parasitism, the protein is packaged into secretory granules and it is targeted to the plant nucleus where it interacts with SMU2 (homolog of suppressor of mec-8 and unc-52 2), an auxiliary spliceosomal protein. We show that SMU2 is expressed in feeding sites and an smu2 mutant is less susceptible to nematode infection. In Arabidopsis expressing 30D08 under the SMU2 promoter, several genes were found to be alternatively spliced and the most abundant functional classes represented among differentially expressed genes were involved in RNA processing, transcription and binding, as well as in development, and hormone and secondary metabolism, representing key cellular processes known to be important for feeding site formation. In conclusion, we demonstrated that the 30D08 effector is secreted from the nematode and targeted to the plant nucleus where its interaction with a host auxiliary spliceosomal protein may alter the pre-mRNA splicing and expression of a subset of genes important for feeding site formation.
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Affiliation(s)
- Anju Verma
- Division of Plant Sciences and Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, USA
| | - Chris Lee
- Division of Plant Sciences and Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, USA
| | - Stephanie Morriss
- Division of Plant Sciences and Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, USA
| | - Fiona Odu
- Division of Plant Sciences and Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, USA
| | - Charlotte Kenning
- Division of Plant Sciences and Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, USA
| | | | - William G Spollen
- Informatics Research Core Facility, University of Missouri, Columbia, MO, 65211, USA
| | - Marriam Lin
- Division of Plant Sciences and Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, USA
| | - Amanda G McRae
- Division of Plant Sciences and Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, USA
| | - Scott A Givan
- Informatics Research Core Facility, University of Missouri, Columbia, MO, 65211, USA
| | - Tarek Hewezi
- Department of Plant Sciences, University of Tennessee, Knoxville, TN, 37996, USA
| | - Richard Hussey
- Department of Plant Pathology, University of Georgia, Athens, GA, 30602, USA
| | - Eric L Davis
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, 27695, USA
| | - Thomas J Baum
- Department of Plant Pathology and Microbiology, Iowa State University, Ames, IA, 50011, USA
| | - Melissa G Mitchum
- Division of Plant Sciences and Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, USA
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8
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Fernández-Ponce C, Durán-Ruiz MC, Narbona-Sánchez I, Muñoz-Miranda JP, Arbulo-Echevarria MM, Serna-Sanz A, Baumann C, Litrán R, Aguado E, Bloch W, García-Cozar F. Ultrastructural Localization and Molecular Associations of HCV Capsid Protein in Jurkat T Cells. Front Microbiol 2018; 8:2595. [PMID: 29354102 PMCID: PMC5758585 DOI: 10.3389/fmicb.2017.02595] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 12/12/2017] [Indexed: 12/24/2022] Open
Abstract
Hepatitis C virus core protein is a highly basic viral protein that multimerizes with itself to form the viral capsid. When expressed in CD4+ T lymphocytes, it can induce modifications in several essential cellular and biological networks. To shed light on the mechanisms underlying the alterations caused by the viral protein, we have analyzed HCV-core subcellular localization and its associations with host proteins in Jurkat T cells. In order to investigate the intracellular localization of Hepatitis C virus core protein, we have used a lentiviral system to transduce Jurkat T cells and subsequently localize the protein using immunoelectron microscopy techniques. We found that in Jurkat T cells, Hepatitis C virus core protein mostly localizes in the nucleus and specifically in the nucleolus. In addition, we performed pull-down assays combined with Mass Spectrometry Analysis, to identify proteins that associate with Hepatitis C virus core in Jurkat T cells. We found proteins such as NOLC1, PP1γ, ILF3, and C1QBP implicated in localization and/or traffic to the nucleolus. HCV-core associated proteins are implicated in RNA processing and RNA virus infection as well as in functions previously shown to be altered in Hepatitis C virus core expressing CD4+ T cells, such as cell cycle delay, decreased proliferation, and induction of a regulatory phenotype. Thus, in the current work, we show the ultrastructural localization of Hepatitis C virus core and the first profile of HCV core associated proteins in T cells, and we discuss the functions and interconnections of these proteins in molecular networks where relevant biological modifications have been described upon the expression of Hepatitis C virus core protein. Thereby, the current work constitutes a necessary step toward understanding the mechanisms underlying HCV core mediated alterations that had been described in relevant biological processes in CD4+ T cells.
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Affiliation(s)
- Cecilia Fernández-Ponce
- Department of Biomedicine, Biotechnology and Public Health, University of Cadiz and Institute of Biomedical Research Cádiz (INIBICA), Cadiz, Spain
| | - Maria C Durán-Ruiz
- Department of Biomedicine, Biotechnology and Public Health, University of Cadiz and Institute of Biomedical Research Cádiz (INIBICA), Cadiz, Spain
| | - Isaac Narbona-Sánchez
- Department of Biomedicine, Biotechnology and Public Health, University of Cadiz and Institute of Biomedical Research Cádiz (INIBICA), Cadiz, Spain
| | - Juan P Muñoz-Miranda
- Department of Biomedicine, Biotechnology and Public Health, University of Cadiz and Institute of Biomedical Research Cádiz (INIBICA), Cadiz, Spain
| | - Mikel M Arbulo-Echevarria
- Department of Biomedicine, Biotechnology and Public Health, University of Cadiz and Institute of Biomedical Research Cádiz (INIBICA), Cadiz, Spain
| | | | | | - Rocío Litrán
- Department of Condensed Matter Physics, University of Cádiz, Puerto Real, Spain
| | - Enrique Aguado
- Department of Biomedicine, Biotechnology and Public Health, University of Cadiz and Institute of Biomedical Research Cádiz (INIBICA), Cadiz, Spain
| | - Wilhelm Bloch
- Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University Cologne, Cologne, Germany
| | - Francisco García-Cozar
- Department of Biomedicine, Biotechnology and Public Health, University of Cadiz and Institute of Biomedical Research Cádiz (INIBICA), Cadiz, Spain
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9
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Boldbaatar A, Lee S, Han S, Jeong AL, Ka HI, Buyanravjikh S, Lee JH, Lim JS, Lee MS, Yang Y. Eupatolide inhibits the TGF-β1-induced migration of breast cancer cells via downregulation of SMAD3 phosphorylation and transcriptional repression of ALK5. Oncol Lett 2017; 14:6031-6039. [PMID: 29113242 PMCID: PMC5661662 DOI: 10.3892/ol.2017.6957] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 08/03/2017] [Indexed: 01/14/2023] Open
Abstract
The epithelial-mesenchymal transition (EMT) is a hallmark of cancer metastasis, and the associated molecular signaling pathways are regarded as therapeutic targets for cancer treatment. Thus, suppressing EMT with a natural chemical compound may be of therapeutic benefit. Eupatolide is a natural chemical compound extracted from the medicinal plant Inula britannica, which is used in Eastern Asia to treat bronchitis, disorders of the digestive system and inflammation. Besides the anti-inflammatory function of eupatolide, the present study found that eupatolide suppressed the migration and invasion of breast cancer cells, which was associated with the downregulation of vimentin in MDA-MB-231 cells and the upregulation of E-cadherin in MCF-7 cells. Treatment with eupatolide also significantly inhibited the migration and invasion of breast cancer cells that had been stimulated with transforming growth factor-β1 (TGF-β1). Eupatolide also suppressed TGF-β1-induced EMT via downregulation of mothers against decapentaplegic homolog 3 (SMAD3) phosphorylation and transcriptional repression of TGF-β receptor 1 (ALK5). In addition to this canonical pathway, the non-canonical protein kinase B (AKT) and extracellular signal-regulated kinase (ERK) pathways were also inhibited by eupatolide treatment. In summary, the results suggest that eupatolide suppresses the migration and invasion of breast cancer cells by blocking the canonical ALK5-SMAD3 signaling pathway and the non-canonical ERK and AKT signaling pathways.
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Affiliation(s)
- Ariundavaa Boldbaatar
- Graduate School of Biological Science, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Sunyi Lee
- Research Center for Women's Disease, Department of Biological Science, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Sora Han
- Research Center for Women's Disease, Department of Biological Science, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Ae Lee Jeong
- Research Center for Women's Disease, Department of Biological Science, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Hye In Ka
- Graduate School of Biological Science, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Sumiyasuren Buyanravjikh
- Graduate School of Biological Science, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Jeong Hyung Lee
- Department of Biochemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Jong-Seok Lim
- Department of Biological Science, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Myung Sok Lee
- Department of Biological Science, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Young Yang
- Department of Biological Science, Sookmyung Women's University, Seoul 04310, Republic of Korea
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10
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De Munter S, Görnemann J, Derua R, Lesage B, Qian J, Heroes E, Waelkens E, Van Eynde A, Beullens M, Bollen M. Split-BioID: a proximity biotinylation assay for dimerization-dependent protein interactions. FEBS Lett 2017; 591:415-424. [DOI: 10.1002/1873-3468.12548] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 12/03/2016] [Accepted: 12/26/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Sofie De Munter
- Laboratory of Biosignaling & Therapeutics; KU Leuven Department of Cellular and Molecular Medicine; University of Leuven; Belgium
| | - Janina Görnemann
- Laboratory of Biosignaling & Therapeutics; KU Leuven Department of Cellular and Molecular Medicine; University of Leuven; Belgium
| | - Rita Derua
- Protein Phosphorylation & Proteomics Lab; KU Leuven Department of Cellular and Molecular Medicine; University of Leuven; Belgium
- SyBioMa; KU Leuven; Belgium
| | - Bart Lesage
- Laboratory of Biosignaling & Therapeutics; KU Leuven Department of Cellular and Molecular Medicine; University of Leuven; Belgium
| | - Junbin Qian
- Laboratory of Biosignaling & Therapeutics; KU Leuven Department of Cellular and Molecular Medicine; University of Leuven; Belgium
| | - Ewald Heroes
- Laboratory of Biosignaling & Therapeutics; KU Leuven Department of Cellular and Molecular Medicine; University of Leuven; Belgium
| | - Etienne Waelkens
- Protein Phosphorylation & Proteomics Lab; KU Leuven Department of Cellular and Molecular Medicine; University of Leuven; Belgium
- SyBioMa; KU Leuven; Belgium
| | - Aleyde Van Eynde
- Laboratory of Biosignaling & Therapeutics; KU Leuven Department of Cellular and Molecular Medicine; University of Leuven; Belgium
| | - Monique Beullens
- Laboratory of Biosignaling & Therapeutics; KU Leuven Department of Cellular and Molecular Medicine; University of Leuven; Belgium
| | - Mathieu Bollen
- Laboratory of Biosignaling & Therapeutics; KU Leuven Department of Cellular and Molecular Medicine; University of Leuven; Belgium
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11
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Lee S, Jeong AL, Park JS, Han S, Jang CY, Kim KI, Kim Y, Park JH, Lim JS, Lee MS, Yang Y. IK-guided PP2A suppresses Aurora B activity in the interphase of tumor cells. Cell Mol Life Sci 2016; 73:3375-86. [PMID: 26906715 PMCID: PMC11108362 DOI: 10.1007/s00018-016-2162-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 01/13/2016] [Accepted: 02/09/2016] [Indexed: 01/02/2023]
Abstract
Aurora B activation is triggered at the mitotic entry and required for proper microtubule-kinetochore attachment at mitotic phase. Therefore, Aurora B should be in inactive form in interphase to prevent aberrant cell cycle progression. However, it is unclear how the inactivation of Aurora B is sustained during interphase. In this study, we find that IK depletion-induced mitotic arrest leads to G2 arrest by Aurora B inhibition, indicating that IK depletion enhances Aurora B activation before mitotic entry. IK binds to Aurora B, and colocalizes on the nuclear foci during interphase. Our data further show that IK inhibits Aurora B activation through recruiting PP2A into IK and Aurora B complex. It is thus believed that IK, as a scaffold protein, guides PP2A into Aurora B to suppress its activity in interphase until mitotic entry.
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Affiliation(s)
- Sunyi Lee
- Division of Biological Sciences, Department of Life Systems, Research Center for Women's Disease, Sookmyung Women's University, Seoul, 140-742, Republic of Korea
| | - Ae Lee Jeong
- Division of Biological Sciences, Department of Life Systems, Research Center for Women's Disease, Sookmyung Women's University, Seoul, 140-742, Republic of Korea
| | - Jeong Su Park
- Division of Biological Sciences, Department of Life Systems, Research Center for Women's Disease, Sookmyung Women's University, Seoul, 140-742, Republic of Korea
| | - Sora Han
- Division of Biological Sciences, Department of Life Systems, Research Center for Women's Disease, Sookmyung Women's University, Seoul, 140-742, Republic of Korea
| | - Chang-Young Jang
- Research Center for Cell Fate Control, College of Pharmacy, Sookmyung Women's University, Seoul, 140-742, Republic of Korea
| | - Keun Il Kim
- Division of Biological Sciences, Department of Life Systems, Research Center for Women's Disease, Sookmyung Women's University, Seoul, 140-742, Republic of Korea
| | - Yonghwan Kim
- Division of Biological Sciences, Department of Life Systems, Research Center for Women's Disease, Sookmyung Women's University, Seoul, 140-742, Republic of Korea
| | - Jong Hoon Park
- Division of Biological Sciences, Department of Life Systems, Research Center for Women's Disease, Sookmyung Women's University, Seoul, 140-742, Republic of Korea
| | - Jong-Seok Lim
- Division of Biological Sciences, Department of Life Systems, Research Center for Women's Disease, Sookmyung Women's University, Seoul, 140-742, Republic of Korea
| | - Myung Sok Lee
- Division of Biological Sciences, Department of Life Systems, Research Center for Women's Disease, Sookmyung Women's University, Seoul, 140-742, Republic of Korea
| | - Young Yang
- Division of Biological Sciences, Department of Life Systems, Research Center for Women's Disease, Sookmyung Women's University, Seoul, 140-742, Republic of Korea.
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12
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Jeong AL, Han S, Lee S, Su Park J, Lu Y, Yu S, Li J, Chun KH, Mills GB, Yang Y. Patient derived mutation W257G of PPP2R1A enhances cancer cell migration through SRC-JNK-c-Jun pathway. Sci Rep 2016; 6:27391. [PMID: 27272709 PMCID: PMC4895347 DOI: 10.1038/srep27391] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 05/17/2016] [Indexed: 01/20/2023] Open
Abstract
Mutation of PPP2R1A has been observed at high frequency in endometrial serous carcinomas but at low frequency in ovarian clear cell carcinoma. However, the biological role of mutation of PPP2R1A in ovarian and endometrial cancer progression remains unclear. In this study, we found that PPP2R1A expression is elevated in high-grade primary tumor patients with papillary serous tumors of the ovary. To determine whether increased levels or mutation of PPP2R1A might contribute to cancer progression, the effects of overexpression or mutation of PPP2R1A on cell proliferation, migration, and PP2A phosphatase activity were investigated using ovarian and endometrial cancer cell lines. Among the mutations, PPP2R1A-W257G enhanced cell migration in vitro through activating SRC-JNK-c-Jun pathway. Overexpression of wild type (WT) PPP2R1A increased its binding ability with B56 regulatory subunits, whereas PPP2R1A-mutations lost the ability to bind to most B56 subunits except B56δ. Total PP2A activity and PPP2R1A-associated PP2Ac activity were significantly increased in cells overexpressing PPP2R1A-WT. In addition, overexpression of PPP2R1A-WT increased cell proliferation in vitro and tumor growth in vivo.
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Affiliation(s)
- Ae Lee Jeong
- Department of Biological Sciences, Sookmyung Women's University, Seoul 140-742, Republic of Korea
| | - Sora Han
- Department of Biological Sciences, Sookmyung Women's University, Seoul 140-742, Republic of Korea
| | - Sunyi Lee
- Department of Biological Sciences, Sookmyung Women's University, Seoul 140-742, Republic of Korea
| | - Jeong Su Park
- Department of Biological Sciences, Sookmyung Women's University, Seoul 140-742, Republic of Korea
| | - Yiling Lu
- Department of Systems Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA
| | - Shuangxing Yu
- Department of Systems Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA
| | - Jane Li
- Department of Systems Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA
| | - Kyung-Hee Chun
- Department of Biochemistry and Molecular Biology, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-752, Republic of Korea
| | - Gordon B Mills
- Department of Systems Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA
| | - Young Yang
- Department of Biological Sciences, Sookmyung Women's University, Seoul 140-742, Republic of Korea
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13
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Ulrich A, Schulz J, Kamprad A, Schütze T, Wahl M. Structural Basis for the Functional Coupling of the Alternative Splicing Factors Smu1 and RED. Structure 2016; 24:762-773. [DOI: 10.1016/j.str.2016.03.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 02/22/2016] [Accepted: 03/08/2016] [Indexed: 12/25/2022]
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