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Lee TA, Han H, Polash A, Cho SK, Lee JW, Ra EA, Lee E, Park A, Kang S, Choi JL, Kim JH, Lee JE, Min KW, Yang SW, Hafner M, Lee I, Yoon JH, Lee S, Park B. The nucleolus is the site for inflammatory RNA decay during infection. Nat Commun 2022; 13:5203. [PMID: 36057640 PMCID: PMC9440930 DOI: 10.1038/s41467-022-32856-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 08/16/2022] [Indexed: 11/12/2022] Open
Abstract
Inflammatory cytokines are key signaling molecules that can promote an immune response, thus their RNA turnover must be tightly controlled during infection. Most studies investigate the RNA decay pathways in the cytosol or nucleoplasm but never focused on the nucleolus. Although this organelle has well-studied roles in ribosome biogenesis and cellular stress sensing, the mechanism of RNA decay within the nucleolus is not completely understood. Here, we report that the nucleolus is an essential site of inflammatory pre-mRNA instability during infection. RNA-sequencing analysis reveals that not only do inflammatory genes have higher intronic read densities compared with non-inflammatory genes, but their pre-mRNAs are highly enriched in nucleoli during infection. Notably, nucleolin (NCL) acts as a guide factor for recruiting cytosine or uracil (C/U)-rich sequence-containing inflammatory pre-mRNAs and the Rrp6-exosome complex to the nucleolus through a physical interaction, thereby enabling targeted RNA delivery to Rrp6-exosomes and subsequent degradation. Consequently, Ncl depletion causes aberrant hyperinflammation, resulting in a severe lethality in response to LPS. Importantly, the dynamics of NCL post-translational modifications determine its functional activity in phases of LPS. This process represents a nucleolus-dependent pathway for maintaining inflammatory gene expression integrity and immunological homeostasis during infection. The nucleolus is the traditional site for ribosomal RNA biogenesis. Here, the authors find that the nucleolus is a site of inflammatory pre-mRNA turnover and elucidated how immune homeostasis can be maintained by controlling inflammatory gene expression.
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Affiliation(s)
- Taeyun A Lee
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, South Korea
| | - Heonjong Han
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, South Korea.,Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University, Seoul, South Korea.,Division of Tumor Immunology, Research Institute, National Cancer Center, Goyang, South Korea
| | - Ahsan Polash
- Laboratory of Muscle Stem Cells and Gene Regulation, National Institute for Arthritis and Musculoskeletal and Skin Disease, National Institutes of Health, Bethesda, MD, USA
| | - Seok Keun Cho
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, South Korea
| | - Ji Won Lee
- Department of Biology, College of Natural Sciences, Gangneung-Wonju National University, Gangneung, South Korea
| | - Eun A Ra
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, South Korea
| | - Eunhye Lee
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, South Korea
| | - Areum Park
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, South Korea
| | - Sujin Kang
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, South Korea
| | - Junhee L Choi
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, South Korea
| | - Ji Hyun Kim
- Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul, South Korea
| | - Ji Eun Lee
- Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul, South Korea.,Samsung Genome Institute (SGI), Samsung Medical Center, Seoul, South Korea
| | - Kyung-Won Min
- Department of Biology, College of Natural Sciences, Gangneung-Wonju National University, Gangneung, South Korea.,Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC, USA
| | - Seong Wook Yang
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, South Korea
| | - Markus Hafner
- Laboratory of Muscle Stem Cells and Gene Regulation, National Institute for Arthritis and Musculoskeletal and Skin Disease, National Institutes of Health, Bethesda, MD, USA
| | - Insuk Lee
- Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University, Seoul, South Korea
| | - Je-Hyun Yoon
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC, USA.
| | - Sungwook Lee
- Division of Tumor Immunology, Research Institute, National Cancer Center, Goyang, South Korea.
| | - Boyoun Park
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, South Korea.
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He L, Qian X, Ge P, Fan D, Ma X, Wu Q, Sun J, Yang L, Shen J, Xu L. NOL6 Regulates the Proliferation and Apoptosis of Gastric Cancer Cells via Regulating TP53I3, CDK4 and MCM7 Expression. Front Oncol 2022; 12:708081. [PMID: 35494047 PMCID: PMC9039204 DOI: 10.3389/fonc.2022.708081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 03/03/2022] [Indexed: 11/20/2022] Open
Abstract
Background Gastric cancer (GC) is a prevalent cancer with high mortality and strong invasiveness, and the entire regulatory networks of GC is still unclear. Objective The aim of this study was to explore the specific mechanism of the effect of nucleolar protein 6 (NOL6) on the proliferation and apoptosis of GC cells. Methods The human gastric adenocarcinoma cell line HGC-27 and AGS were cultured. qRT-PCR was used to verify the expression level of NOL6 in GC cells; MTT and EdU were used to test cell proliferation; TUNEL staining and Flow cytometry were used to detect cell apoptosis; The downstream genes and pathways following NOL6 knockdown were explored through the microarray assay and ingenuity pathway analysis, and the downstream genes were finally verified by qRT-PCR and Western blotting. The xenograft mice were used to investigate the effect of NOL6 on GC in vivo. Results TCGA data analysis showed that NOL6 expression level was higher in GC cells than adjacent normal cells. Over-expression of NOL6 increased proliferation and colony formation, and inhibited the apoptotic rate in AGS and HGC-27 cells, while NOL6 knockdown induced the opposite effects. Through microarray assay and IPA analysis, NOL6-related downstream genes and critical signaling pathways were found. And we verified the relationship between downstream genes and GC. Additionally, NOL6 knockdown could decrease the weight and volume of tumor in the mice. Conclusion NOL6 knockdown could inhibit cell proliferation and induce cell apoptosis of GC, suggesting that NOL6 may serve as a potential therapeutic target for treating GC.
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Affiliation(s)
- Lei He
- Department of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Xiaohan Qian
- Medical Center for Digestive Disease, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Pingping Ge
- Department of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Dong Fan
- Department of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Xiang Ma
- Department of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Qiong Wu
- Department of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jin Sun
- Department of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Lihua Yang
- Medical Center for Digestive Disease, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jian Shen
- Department of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Lijian Xu
- Department of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
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3
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Liang J, Sun W, Song H, Wang C, Li Q, Li C, Wei D, Zhao Y, Li C, Zhang H. NOL6 promotes the proliferation and migration of endometrial cancer cells by regulating TWIST1 expression. Epigenomics 2021; 13:1571-1585. [PMID: 34607487 DOI: 10.2217/epi-2021-0218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Aim: To investigate the role and function of NOL6, a protein related to ribosome biogenesis, in endometrial cancer. Methods: Methyl thiazolyl tetrazolium assay, colony formation assay, flow cytometry apoptosis assay, transwell assay and wound healing assays were carried out for evaluating cell proliferation, migration and apoptosis. Immunohistochemistry, western blot and tumor xenograft assays were carried out for detecting the level of protein expression and tumor formation. Results: We demonstrated that NOL6 is overexpressed in endometrial cancer and promotes cell proliferation and migration while reducing apoptosis. NOL6 regulates the expression of TWIST1, which can restore the changes in cells caused by NOL6 knockdown. Conclusions: NOL6 can promote the proliferation and migration of endometrial cancer cells by regulating TWIST1 expression.
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Affiliation(s)
- Junhui Liang
- Department of Obstetrics & Gynecology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250021, China
| | - Wenjing Sun
- Department of Obstetrics & Gynecology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China
| | - Hui Song
- Department of Obstetrics & Gynecology, Second Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, Shandong, 250001, China
| | - Chong Wang
- Department of General Surgery, Shandong Rongjun General Hospital, Jinan, Shandong, 250014, China
| | - Qianqian Li
- Department of Obstetrics & Gynecology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China
| | - Chunyan Li
- Department of Obstetrics & Gynecology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China
| | - Deying Wei
- Department of Obstetrics & Gynecology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China
| | - Yingzi Zhao
- Department of Obstetrics & Gynecology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China
| | - Changzhong Li
- Department of Obstetrics & Gynecology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250021, China.,Department of Obstetrics & Gynecology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China
| | - Hui Zhang
- Department of Obstetrics & Gynecology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250021, China.,Department of Obstetrics & Gynecology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China
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Sasaki S, Watanabe T, Ibi T, Hasegawa K, Sakamoto Y, Moriwaki S, Kurogi K, Ogino A, Yasumori T, Wakaguri H, Muraki E, Miki Y, Yoshida Y, Inoue Y, Tabuchi I, Iwao K, Arishima T, Kawashima K, Watanabe M, Sugano S, Sugimoto Y, Suzuki Y. Identification of deleterious recessive haplotypes and candidate deleterious recessive mutations in Japanese Black cattle. Sci Rep 2021; 11:6687. [PMID: 33758295 PMCID: PMC7988166 DOI: 10.1038/s41598-021-86225-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 03/05/2021] [Indexed: 02/01/2023] Open
Abstract
Intensive use of a few elite sires has increased the risk of the manifestation of deleterious recessive traits in cattle. Substantial genotyping data gathered using single-nucleotide polymorphism (SNP) arrays have identified the haplotypes with homozygous deficiency, which may compromise survival. We developed Japanese Black cattle haplotypes (JBHs) using SNP array data (4843 individuals) and identified deleterious recessive haplotypes using exome sequencing of 517 sires. We identified seven JBHs with homozygous deficiency. JBH_10 and JBH_17 were associated with the resuming of estrus after artificial insemination, indicating that these haplotypes carried deleterious mutations affecting embryonic survival. The exome data of 517 Japanese Black sires revealed that AC_000165.1:g.85341291C>G of IARS in JBH_8_2, AC_000174.1:g.74743512G>T of CDC45 in JBH_17, and a copy variation region (CNVR_27) of CLDN16 in JBH_1_1 and JBH_1_2 were the candidate mutations. A novel variant AC_000174.1:g.74743512G>T of CDC45 in JBH_17 was located in a splicing donor site at a distance of 5 bp, affecting pre-mRNA splicing. Mating between heterozygotes of JBH_17 indicated that homozygotes carrying the risk allele died around the blastocyst stage. Analysis of frequency of the CDC45 risk allele revealed that its carriers were widespread throughout the tested Japanese Black cattle population. Our approach can effectively manage the inheritance of recessive risk alleles in a breeding population.
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Affiliation(s)
- Shinji Sasaki
- grid.267625.20000 0001 0685 5104Faculty of Agriculture, University of the Ryukyus, 1 Senbaru, Nishihara, Nakagami-gun, Okinawa, 903-0213 Japan ,grid.258333.c0000 0001 1167 1801United Graduate School of Agricultural Sciences, Kagoshima University, 1-21-24 Korimoto, Kagoshima, 890-0065 Japan
| | - Toshio Watanabe
- Maebashi Institute of Animal Science, Livestock Improvement Association of Japan, Inc., Maebashi, 371-0121 Japan
| | - Takayuki Ibi
- grid.261356.50000 0001 1302 4472Graduate School of Environmental and Life Science, Okayama University, Tsushima-naka, Okayama, 700-8530 Japan
| | - Kiyotoshi Hasegawa
- Shimane Prefecture Livestock Technology Center, Koshi, Izumo, Shimane 693-0031 Japan
| | - Yoichi Sakamoto
- Shimane Prefecture Livestock Technology Center, Koshi, Izumo, Shimane 693-0031 Japan
| | - Shunsuke Moriwaki
- Shimane Prefecture Livestock Technology Center, Koshi, Izumo, Shimane 693-0031 Japan
| | - Kazuhito Kurogi
- Maebashi Institute of Animal Science, Livestock Improvement Association of Japan, Inc., Maebashi, 371-0121 Japan
| | - Atsushi Ogino
- Maebashi Institute of Animal Science, Livestock Improvement Association of Japan, Inc., Maebashi, 371-0121 Japan
| | - Takanori Yasumori
- Maebashi Institute of Animal Science, Livestock Improvement Association of Japan, Inc., Maebashi, 371-0121 Japan
| | - Hiroyuki Wakaguri
- grid.26999.3d0000 0001 2151 536XDepartment of Medical Genome Sciences, and Department of Computational Biology, Graduate School of Frontier Sciences, The University of Tokyo, Chiba, 277-8562 Japan
| | - Eiji Muraki
- Hida Beef Cattle Research Department, Gifu Prefectural Livestock Research Institute, Makigadou, Kiomi, Takayama, Gifu 506-0101 Japan
| | - Youko Miki
- Hyogo Prefectural Technology Center for Agriculture, Forest and Fisher, Hokubu Agricultural Technology Institute, Asago, Hyogo 669-5254 Japan
| | - Yuichi Yoshida
- Hyogo Prefectural Technology Center for Agriculture, Forest and Fisher, Hokubu Agricultural Technology Institute, Asago, Hyogo 669-5254 Japan
| | - Yoshinobu Inoue
- Tottori Prefecture Livestock Research Center, Tohaku-gun, Kotoura-cho 689-2503 Japan
| | - Ichiro Tabuchi
- Tottori Prefecture Livestock Research Center, Tohaku-gun, Kotoura-cho 689-2503 Japan
| | - Ken Iwao
- Tottori Prefecture Livestock Research Center, Tohaku-gun, Kotoura-cho 689-2503 Japan
| | - Taichi Arishima
- Cattle Breeding Development Institute of Kagoshima Prefecture, Osumi, So, Kagoshima 899-8212 Japan
| | - Keisuke Kawashima
- Cattle Breeding Development Institute of Kagoshima Prefecture, Osumi, So, Kagoshima 899-8212 Japan
| | - Manabu Watanabe
- grid.26999.3d0000 0001 2151 536XDepartment of Medical Genome Sciences, and Department of Computational Biology, Graduate School of Frontier Sciences, The University of Tokyo, Chiba, 277-8562 Japan
| | - Sumio Sugano
- grid.26999.3d0000 0001 2151 536XDepartment of Medical Genome Sciences, and Department of Computational Biology, Graduate School of Frontier Sciences, The University of Tokyo, Chiba, 277-8562 Japan
| | - Yoshikazu Sugimoto
- Shirakawa Institute of Animal Genetics, Japan Livestock Technology Association, Yushima, Bunkyouku, Tokyo 113-0034 Japan
| | - Yutaka Suzuki
- grid.26999.3d0000 0001 2151 536XDepartment of Medical Genome Sciences, and Department of Computational Biology, Graduate School of Frontier Sciences, The University of Tokyo, Chiba, 277-8562 Japan
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Lord CL, Ospovat O, Wente SR. Nup100 regulates Saccharomyces cerevisiae replicative life span by mediating the nuclear export of specific tRNAs. RNA (NEW YORK, N.Y.) 2017; 23:365-377. [PMID: 27932586 PMCID: PMC5311497 DOI: 10.1261/rna.057612.116] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 11/29/2016] [Indexed: 06/06/2023]
Abstract
Nuclear pore complexes (NPCs), which are composed of nucleoporins (Nups) and regulate transport between the nucleus and cytoplasm, significantly impact the replicative life span (RLS) of Saccharomyces cerevisiae We previously reported that deletion of the nonessential gene NUP100 increases RLS, although the molecular basis for this effect was unknown. In this study, we find that nuclear tRNA accumulation contributes to increased longevity in nup100Δ cells. Fluorescence in situ hybridization (FISH) experiments demonstrate that several specific tRNAs accumulate in the nuclei of nup100Δ mutants. Protein levels of the transcription factor Gcn4 are increased when NUP100 is deleted, and GCN4 is required for the elevated life spans of nup100Δ mutants, similar to other previously described tRNA export and ribosomal mutants. Northern blots indicate that tRNA splicing and aminoacylation are not significantly affected in nup100Δ cells, suggesting that Nup100 is largely required for nuclear export of mature, processed tRNAs. Distinct tRNAs accumulate in the nuclei of nup100Δ and msn5Δ mutants, while Los1-GFP nucleocytoplasmic shuttling is unaffected by Nup100. Thus, we conclude that Nup100 regulates tRNA export in a manner distinct from Los1 or Msn5. Together, these experiments reveal a novel Nup100 role in the tRNA life cycle that impacts the S. cerevisiae life span.
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Affiliation(s)
- Christopher L Lord
- Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee 37240, USA
| | - Ophir Ospovat
- Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee 37240, USA
| | - Susan R Wente
- Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee 37240, USA
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Strategies for Investigating Nuclear–Cytoplasmic tRNA Dynamics in Yeast and Mammalian Cells. Methods Cell Biol 2014; 122:415-36. [DOI: 10.1016/b978-0-12-417160-2.00019-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Protein kinase A is part of a mechanism that regulates nuclear reimport of the nuclear tRNA export receptors Los1p and Msn5p. EUKARYOTIC CELL 2013; 13:209-30. [PMID: 24297441 DOI: 10.1128/ec.00214-13] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The two main signal transduction mechanisms that allow eukaryotes to sense and respond to changes in glucose availability in the environment are the cyclic AMP (cAMP)/protein kinase A (PKA) and AMP-activated protein kinase (AMPK)/Snf1 kinase-dependent pathways. Previous studies have shown that the nuclear tRNA export process is inhibited in Saccharomyces cerevisiae deprived of glucose. However, the signal transduction pathway involved and the mechanism by which glucose availability regulates nuclear-cytoplasmic tRNA trafficking are not understood. Here, we show that inhibition of nuclear tRNA export is caused by a block in nuclear reimport of the tRNA export receptors during glucose deprivation. Cytoplasmic accumulation of the tRNA export receptors during glucose deprivation is not caused by activation of Snf1p. Evidence obtained suggests that PKA is part of the mechanism that regulates nuclear reimport of the tRNA export receptors in response to glucose availability. This mechanism does not appear to involve phosphorylation of the nuclear tRNA export receptors by PKA. The block in nuclear reimport of the tRNA export receptors appears to be caused by activation of an unidentified mechanism when PKA is turned off during glucose deprivation. Taken together, the data suggest that PKA facilitates return of the tRNA export receptors to the nucleus by inhibiting an unidentified activity that facilitates cytoplasmic accumulation of the tRNA export receptors when glucose in the environment is limiting. A PKA-independent mechanism was also found to regulate nuclear tRNA export in response to glucose availability. This mechanism, however, does not regulate nuclear reimport of the tRNA export receptors.
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