1
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Lin S, Ma L, Mo J, Zhao R, Li J, Yu M, Jiang M, Peng L. Immune cell senescence and exhaustion promote the occurrence of liver metastasis in colorectal cancer by regulating epithelial-mesenchymal transition. Aging (Albany NY) 2024; 16:7704-7732. [PMID: 38683136 PMCID: PMC11132022 DOI: 10.18632/aging.205778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 04/03/2024] [Indexed: 05/01/2024]
Abstract
BACKGROUND Liver metastasis (LM) stands as a primary cause of mortality in metastatic colorectal cancer (mCRC), posing a significant impediment to long-term survival benefits from targeted therapy and immunotherapy. However, there is currently a lack of comprehensive investigation into how senescent and exhausted immune cells contribute to LM. METHODS We gathered single-cell sequencing data from primary colorectal cancer (pCRC) and their corresponding matched LM tissues from 16 mCRC patients. In this study, we identified senescent and exhausted immune cells, performed enrichment analysis, cell communication, cell trajectory, and cell-based in vitro experiments to validate the results of single-cell multi-omics. This process allowed us to construct a regulatory network explaining the occurrence of LM. Finally, we utilized weighted gene co-expression network analysis (WGCNA) and 12 machine learning algorithms to create prognostic risk model. RESULTS We identified senescent-like myeloid cells (SMCs) and exhausted T cells (TEXs) as the primary senescent and exhausted immune cells. Our findings indicate that SMCs and TEXs can potentially activate transcription factors downstream via ANGPTL4-SDC1/SDC4, this activation plays a role in regulating the epithelial-mesenchymal transition (EMT) program and facilitates the development of LM, the results of cell-based in vitro experiments have provided confirmation of this conclusion. We also developed and validated a prognostic risk model composed of 12 machine learning algorithms. CONCLUSION This study elucidates the potential molecular mechanisms underlying the occurrence of LM from various angles through single-cell multi-omics analysis in CRC. It also constructs a network illustrating the role of senescent or exhausted immune cells in regulating EMT.
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Affiliation(s)
- Sen Lin
- The Fourth Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Lanyue Ma
- The Fourth Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jiaxin Mo
- The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Ruiqi Zhao
- The Fourth Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jinghao Li
- Department of Traditional Chinese Medicine, The Sixth Affiliated Hospital, South China University of Technology, Foshan, China
| | - Mengjiao Yu
- The Fourth Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Mei Jiang
- Department of Oncology, The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Lisheng Peng
- Department of Hepatology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, China
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2
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Zhang Y, Zhou X, Zhong Y, Chen X, Li Z, Li R, Qin P, Wang S, Yin J, Liu S, Jiang M, Yu Q, Hou Y, Liu S, Wu L. Pan-cancer scRNA-seq analysis reveals immunological and diagnostic significance of the peripheral blood mononuclear cells. Hum Mol Genet 2024; 33:342-354. [PMID: 37944069 DOI: 10.1093/hmg/ddad187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 12/02/2023] [Accepted: 10/19/2023] [Indexed: 11/12/2023] Open
Abstract
Peripheral blood mononuclear cells (PBMCs) reflect systemic immune response during cancer progression. However, a comprehensive understanding of the composition and function of PBMCs in cancer patients is lacking, and the potential of these features to assist cancer diagnosis is also unclear. Here, the compositional and status differences between cancer patients and healthy donors in PBMCs were investigated by single-cell RNA sequencing (scRNA-seq), involving 262,025 PBMCs from 68 cancer samples and 14 healthy samples. We observed an enhanced activation and differentiation of most immune subsets in cancer patients, along with reduction of naïve T cells, expansion of macrophages, impairment of NK cells and myeloid cells, as well as tumor promotion and immunosuppression. Based on characteristics including differential cell type abundances and/or hub genes identified from weight gene co-expression network analysis (WGCNA) modules of each major cell type, we applied logistic regression to construct cancer diagnosis models. Furthermore, we found that the above models can distinguish cancer patients and healthy donors with high sensitivity. Our study provided new insights into using the features of PBMCs in non-invasive cancer diagnosis.
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Affiliation(s)
- Yuanhang Zhang
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Shijingshan District, Beijing 100049, China
- BGI Research, Beishan Industrial Zone, Yantian District, Shenzhen 518083, China
| | - Xiaorui Zhou
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Shijingshan District, Beijing 100049, China
- BGI Research , Beishan Industrial Zone, Yantian District, Shenzhen 518083, China
| | - Yu Zhong
- BGI Research , Beishan Industrial Zone, Yantian District, Shenzhen 518083, China
| | - Xi Chen
- BGI Research , Beishan Industrial Zone, Yantian District, Shenzhen 518083, China
| | - Zeyu Li
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Shijingshan District, Beijing 100049, China
- BGI Research , Beishan Industrial Zone, Yantian District, Shenzhen 518083, China
| | - Rui Li
- BGI Research , Beishan Industrial Zone, Yantian District, Shenzhen 518083, China
| | - Pengfei Qin
- BGI Research , Beishan Industrial Zone, Yantian District, Shenzhen 518083, China
| | - Shanshan Wang
- BGI Research , Beishan Industrial Zone, Yantian District, Shenzhen 518083, China
| | - Jianhua Yin
- BGI Research , Beishan Industrial Zone, Yantian District, Shenzhen 518083, China
| | - Shang Liu
- BGI Research , Beishan Industrial Zone, Yantian District, Shenzhen 518083, China
| | - Miaomiao Jiang
- BGI Research , Beishan Industrial Zone, Yantian District, Shenzhen 518083, China
| | - Qichao Yu
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Shijingshan District, Beijing 100049, China
- BGI Research , Beishan Industrial Zone, Yantian District, Shenzhen 518083, China
| | - Yong Hou
- BGI Research , Beishan Industrial Zone, Yantian District, Shenzhen 518083, China
| | - Shiping Liu
- BGI Research , Beishan Industrial Zone, Yantian District, Shenzhen 518083, China
| | - Liang Wu
- BGI Research , Beishan Industrial Zone, Yantian District, Shenzhen 518083, China
- JFL-BGI STOmics Center, Jinfeng Laboratory , Gaoteng Avenue, Jiulongpo District, Chongqing 401329, China
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3
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Sun ZC, Jiang Z, Xu X, Li M, Zeng Q, Zhu Y, Wang S, Li Y, Tian XL, Hu C. Fish Paralog Proteins RNASEK-a and -b Enhance Type I Interferon Secretion and Promote Apoptosis. Front Immunol 2021; 12:762162. [PMID: 34880860 PMCID: PMC8645942 DOI: 10.3389/fimmu.2021.762162] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Accepted: 10/27/2021] [Indexed: 11/26/2022] Open
Abstract
Type I interferon and apoptosis elicit multifaceted effects on host defense and various diseases, such as viral infections and cancers. However, the gene/protein network regulating type I interferon and apoptosis has not been elucidated completely. In this study, we selected grass carp (Ctenopharyngodon idella) as an experimental model to investigate the modulation of RNASEK on the secretion of type I interferon and apoptosis. We first cloned two paralogs RNASEK-a and -b in grass carp, defined three exons in each gene, and found the length of both coding regions is 306 bp with 73.27% of protein homology. The protein sequences of the two paralogs are highly conserved across species. Two proteins were mainly localized in early and late endosomes and endoplasmic reticulum. Further, quantitative real-time PCR demonstrated that dsRNA poly I:C and grass carp reovirus upregulated RNASEK-a and -b in grass carp cells and tissues. Overexpression of RNASEK-a and -b individually induced type I interferon expression and the phosphorylation of IRF3/IRF7 shown by Western blot and immunofluorescent staining, increased Bax/Bcl-2 mRNA ratio, DNA fragmentations, TUNEL-positive cells, and the proportion of Annexin V-positive signals in flow cytometry, and activated eIF2α, opposite to that observed when RNASEK-a and -b were knocked down in multiple cell types. Taken together, we claim for the first time that fish paralog proteins RNASEK-a and -b enhance type I interferon secretion and promote apoptosis, which may be involved in the phosphorylation of IRF3/IRF7 and eIF2α, respectively. Our study reveals a previously unrecognized role of RNASEK as a new positive regulator of type I interferon and apoptosis.
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Affiliation(s)
- Zhi-Chao Sun
- College of Life Science, Nanchang University, Nanchang, China.,Human Aging Research Institute, Nanchang University, Nanchang, China.,Jiangxi Key Laboratory of Human Aging, Nanchang University, Nanchang, China
| | - Zeyin Jiang
- College of Life Science, Nanchang University, Nanchang, China
| | - Xiaowen Xu
- College of Life Science, Nanchang University, Nanchang, China
| | - Meifeng Li
- College of Life Science, Nanchang University, Nanchang, China
| | - Qing Zeng
- College of Life Science, Nanchang University, Nanchang, China
| | - Ying Zhu
- College of Life Science, Nanchang University, Nanchang, China.,Human Aging Research Institute, Nanchang University, Nanchang, China.,Jiangxi Key Laboratory of Human Aging, Nanchang University, Nanchang, China.,Blood Transfusion Department, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Shanghong Wang
- College of Life Science, Nanchang University, Nanchang, China
| | - Yuanyuan Li
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Xiao-Li Tian
- College of Life Science, Nanchang University, Nanchang, China.,Human Aging Research Institute, Nanchang University, Nanchang, China.,Jiangxi Key Laboratory of Human Aging, Nanchang University, Nanchang, China
| | - Chengyu Hu
- College of Life Science, Nanchang University, Nanchang, China
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4
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Shigematsu M, Kawamura T, Morichika K, Izumi N, Kiuchi T, Honda S, Pliatsika V, Matsubara R, Rigoutsos I, Katsuma S, Tomari Y, Kirino Y. RNase κ promotes robust piRNA production by generating 2',3'-cyclic phosphate-containing precursors. Nat Commun 2021; 12:4498. [PMID: 34301931 PMCID: PMC8302750 DOI: 10.1038/s41467-021-24681-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 07/01/2021] [Indexed: 11/13/2022] Open
Abstract
In animal germlines, PIWI proteins and the associated PIWI-interacting RNAs (piRNAs) protect genome integrity by silencing transposons. Here we report the extensive sequence and quantitative correlations between 2',3'-cyclic phosphate-containing RNAs (cP-RNAs), identified using cP-RNA-seq, and piRNAs in the Bombyx germ cell line and mouse testes. The cP-RNAs containing 5'-phosphate (P-cP-RNAs) identified by P-cP-RNA-seq harbor highly consistent 5'-end positions as the piRNAs and are loaded onto PIWI protein, suggesting their direct utilization as piRNA precursors. We identified Bombyx RNase Kappa (BmRNase κ) as a mitochondria-associated endoribonuclease which produces cP-RNAs during piRNA biogenesis. BmRNase κ-depletion elevated transposon levels and disrupted a piRNA-mediated sex determination in Bombyx embryos, indicating the crucial roles of BmRNase κ in piRNA biogenesis and embryonic development. Our results reveal a BmRNase κ-engaged piRNA biogenesis pathway, in which the generation of cP-RNAs promotes robust piRNA production.
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Affiliation(s)
- Megumi Shigematsu
- Computational Medicine Center, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
| | - Takuya Kawamura
- Computational Medicine Center, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
| | - Keisuke Morichika
- Computational Medicine Center, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
| | - Natsuko Izumi
- Institute for Quantitative Biosciences, The University of Tokyo, Bunkyo-Ku, Tokyo, Japan
| | - Takashi Kiuchi
- Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-Ku, Tokyo, Japan
| | - Shozo Honda
- Computational Medicine Center, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
| | - Venetia Pliatsika
- Computational Medicine Center, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
| | - Ryuma Matsubara
- Computational Medicine Center, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
| | - Isidore Rigoutsos
- Computational Medicine Center, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
| | - Susumu Katsuma
- Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-Ku, Tokyo, Japan
| | - Yukihide Tomari
- Institute for Quantitative Biosciences, The University of Tokyo, Bunkyo-Ku, Tokyo, Japan
| | - Yohei Kirino
- Computational Medicine Center, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA.
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5
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Abbas YM, Wu D, Bueler SA, Robinson CV, Rubinstein JL. Structure of V-ATPase from the mammalian brain. Science 2020; 367:1240-1246. [PMID: 32165585 DOI: 10.1126/science.aaz2924] [Citation(s) in RCA: 125] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 02/12/2020] [Indexed: 12/16/2022]
Abstract
In neurons, the loading of neurotransmitters into synaptic vesicles uses energy from proton-pumping vesicular- or vacuolar-type adenosine triphosphatases (V-ATPases). These membrane protein complexes possess numerous subunit isoforms, which complicates their analysis. We isolated homogeneous rat brain V-ATPase through its interaction with SidK, a Legionella pneumophila effector protein. Cryo-electron microscopy allowed the construction of an atomic model, defining the enzyme's ATP:proton ratio as 3:10 and revealing a homolog of yeast subunit f in the membrane region, which we tentatively identify as RNAseK. The c ring encloses the transmembrane anchors for cleaved ATP6AP1/Ac45 and ATP6AP2/PRR, the latter of which is the (pro)renin receptor that, in other contexts, is involved in both Wnt signaling and the renin-angiotensin system that regulates blood pressure. This structure shows how ATP6AP1/Ac45 and ATP6AP2/PRR enable assembly of the enzyme's catalytic and membrane regions.
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Affiliation(s)
- Yazan M Abbas
- Molecular Medicine Program, The Hospital for Sick Children Research Institute, Toronto, ON M5G 0A4, Canada
| | - Di Wu
- Physical and Theoretical Chemistry Laboratory, University of Oxford, Oxford OX1 3QZ, UK
| | - Stephanie A Bueler
- Molecular Medicine Program, The Hospital for Sick Children Research Institute, Toronto, ON M5G 0A4, Canada
| | - Carol V Robinson
- Physical and Theoretical Chemistry Laboratory, University of Oxford, Oxford OX1 3QZ, UK
| | - John L Rubinstein
- Molecular Medicine Program, The Hospital for Sick Children Research Institute, Toronto, ON M5G 0A4, Canada. .,Department of Medical Biophysics, University of Toronto, Toronto, ON M5G 1L7, Canada.,Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada
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6
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Adamopoulos PG, Kontos CK, Scorilas A, Sideris DC. Identification of novel alternative transcripts of the human Ribonuclease κ (RNASEK) gene using 3′ RACE and high-throughput sequencing approaches. Genomics 2020; 112:943-951. [DOI: 10.1016/j.ygeno.2019.06.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 05/13/2019] [Accepted: 06/10/2019] [Indexed: 01/25/2023]
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7
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Pinkham C, Ahmed A, Bracci N, Narayanan A, Kehn-Hall K. Host-based processes as therapeutic targets for Rift Valley fever virus. Antiviral Res 2018; 160:64-78. [PMID: 30316916 DOI: 10.1016/j.antiviral.2018.10.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 09/27/2018] [Accepted: 10/05/2018] [Indexed: 12/28/2022]
Abstract
Rift Valley fever virus (RVFV) is an enveloped, segmented, negative sense RNA virus that replicates within the host's cytoplasm. To facilitate its replication, RVFV must utilize host cell processes and as such, these processes may serve as potential therapeutic targets. This review summarizes key host cell processes impacted by RVFV infection. Specifically the influence of RVFV on host transcriptional regulation, post-transcriptional regulation, protein half-life and availability, host signal transduction, trafficking and secretory pathways, cytoskeletal modulation, and mitochondrial processes and oxidative stress are discussed. Therapeutics targeted towards host processes that are essential for RVFV to thrive as well as their efficacy and importance to viral pathogenesis are highlighted.
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Affiliation(s)
- Chelsea Pinkham
- National Center for Biodefense and Infectious Diseases, School of Systems Biology, George Mason University, Manassas, VA, USA
| | - Aslaa Ahmed
- National Center for Biodefense and Infectious Diseases, School of Systems Biology, George Mason University, Manassas, VA, USA
| | - Nicole Bracci
- National Center for Biodefense and Infectious Diseases, School of Systems Biology, George Mason University, Manassas, VA, USA
| | - Aarthi Narayanan
- National Center for Biodefense and Infectious Diseases, School of Systems Biology, George Mason University, Manassas, VA, USA
| | - Kylene Kehn-Hall
- National Center for Biodefense and Infectious Diseases, School of Systems Biology, George Mason University, Manassas, VA, USA.
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8
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Kladi-Skandali A, Mavridis K, Scorilas A, Sideris DC. Expressional profiling and clinical relevance of RNase κ in prostate cancer: a novel indicator of favorable progression-free survival. J Cancer Res Clin Oncol 2018; 144:2049-2057. [PMID: 30054827 DOI: 10.1007/s00432-018-2719-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 07/19/2018] [Indexed: 01/26/2023]
Abstract
PURPOSE Considering the unmet need for novel molecular tumor markers capable of improving prostate cancer (CaP) patients' management along with the fruitful results regarding the future use of ribonucleases (RNases) as molecular diagnostic and prognostic markers in CaP, we aimed to study the expressional profile of RNase κ in CaP and BPH and to investigate its clinical significance in CaP. METHODS Total RNA was extracted from 212 prostatic tissue samples (101 BPH and 111 CaP) and, following cDNA synthesis, quantitative real-time PCR (qPCR) was performed for the expressional quantification of RNase κ. Extensive statistical analysis, including bootstrap resampling, was performed to investigate the differential expression of RNase κ in patients with BPH and CaP and its associations with patients' clinicopathological and survival data. RESULTS RNase κ was significantly downregulated (P = 0.002) in CaP patients compared to BPH ones. RNase κ overexpression was associated with decreased risk of CaP development and can discriminate between CaP and BPH independently of serum PSA levels (crude odds ratio = 0.93, P = 0.001). RNase κ upregulation was also associated with less advanced (P = 0.018) and less aggressive (P = 0.001) tumors as well as with longer progression-free survival (PFS) (P = 0.003). Finally univariate bootstrap Cox regression confirmed that RNase κ was associated with favorable prognosis (HR = 0.85, P = 0.002). CONCLUSIONS RNase κ is a biomarker of favorable prognosis in CaP, which is significantly associated with less advanced and aggressive disease, as well as with enhanced PFS.
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Affiliation(s)
- Athina Kladi-Skandali
- Department of Biochemistry and Molecular Biology, Faculty of Biology, National and Kapodistrian University of Athens, 15701 Panepistimiopolis, Athens, Greece
| | - Konstantinos Mavridis
- Department of Biochemistry and Molecular Biology, Faculty of Biology, National and Kapodistrian University of Athens, 15701 Panepistimiopolis, Athens, Greece
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, Heraklion, 70013, Greece
| | - Andreas Scorilas
- Department of Biochemistry and Molecular Biology, Faculty of Biology, National and Kapodistrian University of Athens, 15701 Panepistimiopolis, Athens, Greece
| | - Diamantis C Sideris
- Department of Biochemistry and Molecular Biology, Faculty of Biology, National and Kapodistrian University of Athens, 15701 Panepistimiopolis, Athens, Greece.
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9
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Zhang G, Asad S, Khromykh AA, Asgari S. Cell fusing agent virus and dengue virus mutually interact in Aedes aegypti cell lines. Sci Rep 2017; 7:6935. [PMID: 28761113 PMCID: PMC5537255 DOI: 10.1038/s41598-017-07279-5] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 06/26/2017] [Indexed: 12/31/2022] Open
Abstract
The genus Flavivirus contains more than 70 single-stranded, positive-sense arthropod-borne RNA viruses. Some flaviviruses are particularly medically important to humans and other vertebrates including dengue virus (DENV), West Nile virus, and yellow fever virus. These viruses are transmitted to vertebrates by mosquitoes and other arthropod species. Mosquitoes are also infected by insect-specific flaviviruses (ISFs) that do not appear to be infective to vertebrates. Cell fusing agent virus (CFAV) was the first described ISF, which was discovered in an Aedes aegypti cell culture. We found that while CFAV infection could be significantly reduced by application of RNAi against the NS5 gene, removal of the treatment led to quick restoration of CFAV replication. Interestingly, we found that CFAV infection significantly enhanced replication of DENV, and vice versa, DENV infection significantly enhanced replication of CFAV in mosquito cells. We have shown that CFAV infection leads to increase in the expression of ribonuclease kappa (RNASEK), which is known to promote infection of viruses that rely on endocytosis and pH-dependent entry. Knockdown of RNASEK by dsRNA resulted in reduced DENV replication. Thus, increased expression of RNASEK induced by CFAV is likely to contribute to enhanced DENV replication in CFAV-infected cells.
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Affiliation(s)
- Guangmei Zhang
- Australian Infectious Disease Research Centre, School of Biological Sciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Sultan Asad
- Australian Infectious Disease Research Centre, School of Biological Sciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Alexander A Khromykh
- Australian Infectious Disease Research Centre, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Sassan Asgari
- Australian Infectious Disease Research Centre, School of Biological Sciences, The University of Queensland, Brisbane, QLD 4072, Australia.
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10
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Traurig M, Hanson RL, Marinelarena A, Kobes S, Piaggi P, Cole S, Curran JE, Blangero J, Göring H, Kumar S, Nelson RG, Howard BV, Knowler WC, Baier LJ, Bogardus C. Analysis of SLC16A11 Variants in 12,811 American Indians: Genotype-Obesity Interaction for Type 2 Diabetes and an Association With RNASEK Expression. Diabetes 2016; 65:510-9. [PMID: 26487785 PMCID: PMC4747458 DOI: 10.2337/db15-0571] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 10/11/2015] [Indexed: 01/31/2023]
Abstract
Genetic variants in SLC16A11 were recently reported to be associated with type 2 diabetes in Mexican and other Latin American populations. The diabetes risk haplotype had a frequency of 50% in Native Americans from Mexico but was rare in Europeans and Africans. In the current study, we analyzed SLC16A11 in 12,811 North American Indians and found that the diabetes risk haplotype, tagged by the rs75493593 A allele, was nominally associated with type 2 diabetes (P = 0.001, odds ratio 1.11). However, there was a strong interaction with BMI (P = 5.1 × 10(-7)) such that the diabetes association was stronger in leaner individuals. rs75493593 was also strongly associated with BMI in individuals with type 2 diabetes (P = 3.4 × 10(-15)) but not in individuals without diabetes (P = 0.77). Longitudinal analyses suggest that this is due, in part, to an association of the A allele with greater weight loss following diabetes onset (P = 0.02). Analyses of global gene expression data from adipose tissue, skeletal muscle, and whole blood provide evidence that rs75493593 is associated with expression of the nearby RNASEK gene, suggesting that RNASEK expression may mediate the effect of genotype on diabetes.
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Affiliation(s)
- Michael Traurig
- Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Phoenix, AZ
| | - Robert L Hanson
- Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Phoenix, AZ
| | - Alejandra Marinelarena
- Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Phoenix, AZ
| | - Sayuko Kobes
- Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Phoenix, AZ
| | - Paolo Piaggi
- Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Phoenix, AZ
| | - Shelley Cole
- Texas Biomedical Research Institute, San Antonio, TX
| | - Joanne E Curran
- South Texas Diabetes and Obesity Institute, The University of Texas Rio Grande Valley School of Medicine, Brownsville, TX
| | - John Blangero
- South Texas Diabetes and Obesity Institute, The University of Texas Rio Grande Valley School of Medicine, Brownsville, TX
| | - Harald Göring
- South Texas Diabetes and Obesity Institute, The University of Texas Rio Grande Valley School of Medicine, Brownsville, TX
| | - Satish Kumar
- South Texas Diabetes and Obesity Institute, The University of Texas Rio Grande Valley School of Medicine, Brownsville, TX
| | - Robert G Nelson
- Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Phoenix, AZ
| | - Barbara V Howard
- MedStar Health Research Institute, Hyattsville, MD Georgetown-Howard Universities Center for Clinical and Translational Science, Washington, DC
| | - William C Knowler
- Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Phoenix, AZ
| | - Leslie J Baier
- Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Phoenix, AZ
| | - Clifton Bogardus
- Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Phoenix, AZ
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11
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Perreira JM, Aker AM, Savidis G, Chin CR, McDougall WM, Portmann JM, Meraner P, Smith MC, Rahman M, Baker RE, Gauthier A, Franti M, Brass AL. RNASEK Is a V-ATPase-Associated Factor Required for Endocytosis and the Replication of Rhinovirus, Influenza A Virus, and Dengue Virus. Cell Rep 2015. [PMID: 26212330 DOI: 10.1016/j.celrep.2015.06.076] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Human rhinovirus (HRV) causes upper respiratory infections and asthma exacerbations. We screened multiple orthologous RNAi reagents and identified host proteins that modulate HRV replication. Here, we show that RNASEK, a transmembrane protein, was needed for the replication of HRV, influenza A virus, and dengue virus. RNASEK localizes to the cell surface and endosomal pathway and closely associates with the vacuolar ATPase (V-ATPase) proton pump. RNASEK is required for endocytosis, and its depletion produces enlarged clathrin-coated pits (CCPs) at the cell surface. These enlarged CCPs contain endocytic cargo and are bound by the scissioning GTPase, DNM2. Loss of RNASEK alters the localization of multiple V-ATPase subunits and lowers the levels of the ATP6AP1 subunit. Together, our results show that RNASEK closely associates with the V-ATPase and is required for its function; its loss prevents the early events of endocytosis and the replication of multiple pathogenic viruses.
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Affiliation(s)
- Jill M Perreira
- Microbiology and Physiological Systems Department, University of Massachusetts Medical School, University of Massachusetts, Worcester, MA 01655, USA
| | - Aaron M Aker
- Microbiology and Physiological Systems Department, University of Massachusetts Medical School, University of Massachusetts, Worcester, MA 01655, USA
| | - George Savidis
- Microbiology and Physiological Systems Department, University of Massachusetts Medical School, University of Massachusetts, Worcester, MA 01655, USA
| | - Christopher R Chin
- Microbiology and Physiological Systems Department, University of Massachusetts Medical School, University of Massachusetts, Worcester, MA 01655, USA
| | - William M McDougall
- Microbiology and Physiological Systems Department, University of Massachusetts Medical School, University of Massachusetts, Worcester, MA 01655, USA
| | - Jocelyn M Portmann
- Microbiology and Physiological Systems Department, University of Massachusetts Medical School, University of Massachusetts, Worcester, MA 01655, USA
| | - Paul Meraner
- Microbiology and Physiological Systems Department, University of Massachusetts Medical School, University of Massachusetts, Worcester, MA 01655, USA
| | - Miles C Smith
- Microbiology and Physiological Systems Department, University of Massachusetts Medical School, University of Massachusetts, Worcester, MA 01655, USA
| | - Motiur Rahman
- Microbiology and Physiological Systems Department, University of Massachusetts Medical School, University of Massachusetts, Worcester, MA 01655, USA
| | - Richard E Baker
- Microbiology and Physiological Systems Department, University of Massachusetts Medical School, University of Massachusetts, Worcester, MA 01655, USA
| | - Annick Gauthier
- Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Michael Franti
- Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Abraham L Brass
- Microbiology and Physiological Systems Department, University of Massachusetts Medical School, University of Massachusetts, Worcester, MA 01655, USA.
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12
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Hackett BA, Yasunaga A, Panda D, Tartell MA, Hopkins KC, Hensley SE, Cherry S. RNASEK is required for internalization of diverse acid-dependent viruses. Proc Natl Acad Sci U S A 2015; 112:7797-802. [PMID: 26056282 PMCID: PMC4485095 DOI: 10.1073/pnas.1424098112] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Viruses must gain entry into cells to establish infection. In general, viruses enter either at the plasma membrane or from intracellular endosomal compartments. Viruses that use endosomal pathways are dependent on the cellular factors that control this process; however, these genes have proven to be essential for endogenous cargo uptake, and thus are of limited value for therapeutic intervention. The identification of genes that are selectively required for viral uptake would make appealing drug targets, as their inhibition would block an early step in the life cycle of diverse viruses. At this time, we lack pan-antiviral therapeutics, in part because of our lack of knowledge of such cellular factors. RNAi screening has begun to reveal previously unknown genes that play roles in viral infection. We identified dRNASEK in two genome-wide RNAi screens performed in Drosophila cells against West Nile and Rift Valley Fever viruses. Here we found that ribonuclease kappa (RNASEK) is essential for the infection of human cells by divergent and unrelated positive- and negative-strand-enveloped viruses from the Flaviviridae, Togaviridae, Bunyaviridae, and Orthomyxoviridae families that all enter cells from endosomal compartments. In contrast, RNASEK was dispensable for viruses, including parainfluenza virus 5 and Coxsackie B virus, that enter at the plasma membrane. RNASEK is dispensable for attachment but is required for uptake of these acid-dependent viruses. Furthermore, this requirement appears specific, as general endocytic uptake of transferrin is unaffected in RNASEK-depleted cells. Therefore, RNASEK is a potential host cell Achilles' heel for viral infection.
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Affiliation(s)
- Brent A Hackett
- Department of Microbiology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
| | - Ari Yasunaga
- Department of Microbiology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
| | - Debasis Panda
- Department of Microbiology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
| | - Michael A Tartell
- Department of Microbiology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
| | - Kaycie C Hopkins
- Department of Microbiology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
| | | | - Sara Cherry
- Department of Microbiology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104;
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Swan AL, Stekel DJ, Hodgman C, Allaway D, Alqahtani MH, Mobasheri A, Bacardit J. A machine learning heuristic to identify biologically relevant and minimal biomarker panels from omics data. BMC Genomics 2015; 16 Suppl 1:S2. [PMID: 25923811 PMCID: PMC4315157 DOI: 10.1186/1471-2164-16-s1-s2] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND Investigations into novel biomarkers using omics techniques generate large amounts of data. Due to their size and numbers of attributes, these data are suitable for analysis with machine learning methods. A key component of typical machine learning pipelines for omics data is feature selection, which is used to reduce the raw high-dimensional data into a tractable number of features. Feature selection needs to balance the objective of using as few features as possible, while maintaining high predictive power. This balance is crucial when the goal of data analysis is the identification of highly accurate but small panels of biomarkers with potential clinical utility. In this paper we propose a heuristic for the selection of very small feature subsets, via an iterative feature elimination process that is guided by rule-based machine learning, called RGIFE (Rule-guided Iterative Feature Elimination). We use this heuristic to identify putative biomarkers of osteoarthritis (OA), articular cartilage degradation and synovial inflammation, using both proteomic and transcriptomic datasets. RESULTS AND DISCUSSION Our RGIFE heuristic increased the classification accuracies achieved for all datasets when no feature selection is used, and performed well in a comparison with other feature selection methods. Using this method the datasets were reduced to a smaller number of genes or proteins, including those known to be relevant to OA, cartilage degradation and joint inflammation. The results have shown the RGIFE feature reduction method to be suitable for analysing both proteomic and transcriptomics data. Methods that generate large 'omics' datasets are increasingly being used in the area of rheumatology. CONCLUSIONS Feature reduction methods are advantageous for the analysis of omics data in the field of rheumatology, as the applications of such techniques are likely to result in improvements in diagnosis, treatment and drug discovery.
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Affiliation(s)
- Anna L Swan
- School of Biosciences, Faculty of Science, University of Nottingham, Sutton Bonington Campus, Leicestershire, LE12 5RD, United Kingdom
| | - Dov J Stekel
- School of Biosciences, Faculty of Science, University of Nottingham, Sutton Bonington Campus, Leicestershire, LE12 5RD, United Kingdom
| | - Charlie Hodgman
- School of Biosciences, Faculty of Science, University of Nottingham, Sutton Bonington Campus, Leicestershire, LE12 5RD, United Kingdom
- The D-BOARD European Consortium for Biomarker Discovery, The Universities of Surrey, Nottingham and Newcastle, United Kingdom
| | - David Allaway
- WALTHAM® Centre for Pet Nutrition, Waltham-on-the-Wolds, Melton Mowbray, Leicestershire, LE14 4RT, United Kingdom
| | - Mohammed H Alqahtani
- Center of Excellence in Genomic Medicine Research (CEGMR), King AbdulAziz University, Jeddah, 21589, Kingdom of Saudi Arabia
| | - Ali Mobasheri
- The D-BOARD European Consortium for Biomarker Discovery, The Universities of Surrey, Nottingham and Newcastle, United Kingdom
- School of Veterinary Medicine, Faculty of Health and Medical Sciences, University of Surrey, Duke of Kent Building, Guildford, Surrey, GU2 7XH, United Kingdom
- Center of Excellence in Genomic Medicine Research (CEGMR), King AbdulAziz University, Jeddah, 21589, Kingdom of Saudi Arabia
- Arthritis Research UK Centre for Sport, Exercise, and Osteoarthritis, Arthritis Research UK Pain Centre, Medical Research Council-Arthritis Research UK Centre for Musculoskeletal Ageing Research, Faculty of Medicine and Health Sciences, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom
| | - Jaume Bacardit
- The D-BOARD European Consortium for Biomarker Discovery, The Universities of Surrey, Nottingham and Newcastle, United Kingdom
- The Interdisciplinary Computing and Complex BioSystems (ICOS) research group, School of Computing Science, Newcastle University, Claremont Tower, Newcastle-upon-Tyne, NE1 7RU, United Kingdom
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A subtle alternative splicing event gives rise to a widely expressed human RNase k isoform. PLoS One 2014; 9:e96557. [PMID: 24797913 PMCID: PMC4010519 DOI: 10.1371/journal.pone.0096557] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2014] [Accepted: 04/09/2014] [Indexed: 12/30/2022] Open
Abstract
Subtle alternative splicing leads to the formation of RNA variants lacking or including a small number of nucleotides. To date, the impact of subtle alternative splicing phenomena on protein biosynthesis has been studied in frame-preserving incidents. On the contrary, mRNA isoforms derived from frame-shifting events were poorly studied and generally characterized as non-coding. This work provides evidence for a frame-shifting subtle alternative splicing event which results in the production of a novel protein isoform. We applied a combined molecular approach for the cloning and expression analysis of a human RNase κ transcript (RNase κ-02) which lacks four consecutive bases compared to the previously isolated RNase κ isoform. RNase κ-02 mRNA is expressed in all human cell lines tested end encodes the synthesis of a 134-amino-acid protein by utilizing an alternative initiation codon. The expression of RNase κ-02 in the cytoplasm of human cells was verified by Western blot and immunofluorescence analysis using a specific polyclonal antibody developed on the basis of the amino-acid sequence difference between the two protein isoforms. The results presented here show that subtle changes during mRNA splicing can lead to the expression of significantly altered protein isoforms.
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Kiritsi MN, Fragoulis EG, Sideris DC. Essential cysteine residues for human RNase κ catalytic activity. FEBS J 2012; 279:1318-26. [DOI: 10.1111/j.1742-4658.2012.08526.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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A hybrid-specific, polymerase chain reaction-based amplification approach for chromosomal walking. Anal Biochem 2009; 388:342-4. [DOI: 10.1016/j.ab.2009.02.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2009] [Revised: 02/25/2009] [Accepted: 02/25/2009] [Indexed: 11/21/2022]
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17
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Rampias TN, Fragoulis EG, Sideris DC. Genomic structure and expression analysis of the RNase kappa family ortholog gene in the insect Ceratitis capitata. FEBS J 2008; 275:6217-27. [PMID: 19016845 DOI: 10.1111/j.1742-4658.2008.06746.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Cc RNase is the founding member of the recently identified RNase kappa family, which is represented by a single ortholog in a wide range of animal taxonomic groups. Although the precise biological role of this protein is still unknown, it has been shown that the recombinant proteins isolated so far from the insect Ceratitis capitata and from human exhibit ribonucleolytic activity. In this work, we report the genomic organization and molecular evolution of the RNase kappa gene from various animal species, as well as expression analysis of the ortholog gene in C. capitata. The high degree of amino acid sequence similarity, in combination with the fact that exon sizes and intronic positions are extremely conserved among RNase kappa orthologs in 15 diverse genomes from sea anemone to human, imply a very significant biological function for this enzyme. In C. capitata, two forms of RNase kappa mRNA (0.9 and 1.5 kb) with various lengths of 3' UTR were identified as alternative products of a single gene, resulting from the use of different polyadenylation signals. Both transcripts are expressed in all insect tissues and developmental stages. Sequence analysis of the extended region of the longer transcript revealed the existence of three mRNA instability motifs (AUUUA) and five poly(U) tracts, whose functional importance in RNase kappa mRNA decay remains to be explored.
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Affiliation(s)
- Theodoros N Rampias
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Athens, Greece
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