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Shin JJ, Par-Young J, Unlu S, McNamara A, Park HJ, Shin MS, Gee RJ, Doyle H, Afinogenova Y, Zidan E, Kwah J, Russo A, Mamula M, Hsu FI, Catanzaro J, Racke M, Bucala R, Wilen C, Kang I. Defining Clinical and Immunological Predictors of Poor Immune Responses to COVID-19 mRNA Vaccines in Patients with Primary Antibody Deficiency. J Clin Immunol 2022; 42:1137-1150. [PMID: 35713752 PMCID: PMC9203263 DOI: 10.1007/s10875-022-01296-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 05/25/2022] [Indexed: 11/30/2022]
Abstract
Immune responses to coronavirus disease 2019 (COVID-19) mRNA vaccines in primary antibody deficiencies (PADs) are largely unknown. We investigated antibody and CD4+ T-cell responses specific for SARS-CoV-2 spike protein (S) before and after vaccination and associations between vaccine response and patients' clinical and immunological characteristics in PADs. The PAD cohort consisted of common variable immune deficiency (CVID) and other PADs, not meeting the criteria for CVID diagnosis (oPADs). Anti-S IgG, IgA, and IgG subclasses 1 and 3 increased after vaccination and correlated with neutralization activity in HCs and patients with oPADs. However, 42% of CVID patients developed such responses after the 2nd dose. A similar pattern was also observed with S-specific CD4+ T-cells as determined by OX40 and 4-1BB expression. Patients with poor anti-S IgG response had significantly lower levels of baseline IgG, IgA, CD19+ B-cells, switched memory B-cells, naïve CD8+ T-cells, and a higher frequency of EM CD8+ T-cells and autoimmunity compared to patients with adequate anti-S IgG responses. Patients with oPADs can develop humoral and cellular immune responses to vaccines similar to HCs. However, a subset of CVID patients exhibit impairment in developing such responses, which can be predicted by the baseline immune profile and history of autoimmunity.
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Affiliation(s)
- Junghee Jenny Shin
- Section of Rheumatology, Allergy & Immunology, Department of Internal Medicine, Yale University School of Medicine, 300 Cedar Street, New Haven, Connecticut, 06520, USA
| | - Jennefer Par-Young
- Section of Rheumatology, Allergy & Immunology, Department of Internal Medicine, Yale University School of Medicine, 300 Cedar Street, New Haven, Connecticut, 06520, USA
| | - Serhan Unlu
- Section of Rheumatology, Allergy & Immunology, Department of Internal Medicine, Yale University School of Medicine, 300 Cedar Street, New Haven, Connecticut, 06520, USA
| | - Andrew McNamara
- Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut, 06516, USA
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, Connecticut, 06516, USA
| | - Hong-Jai Park
- Section of Rheumatology, Allergy & Immunology, Department of Internal Medicine, Yale University School of Medicine, 300 Cedar Street, New Haven, Connecticut, 06520, USA
| | - Min Sun Shin
- Section of Rheumatology, Allergy & Immunology, Department of Internal Medicine, Yale University School of Medicine, 300 Cedar Street, New Haven, Connecticut, 06520, USA
| | - Renelle J Gee
- Section of Rheumatology, Allergy & Immunology, Department of Internal Medicine, Yale University School of Medicine, 300 Cedar Street, New Haven, Connecticut, 06520, USA
| | - Hester Doyle
- Section of Rheumatology, Allergy & Immunology, Department of Internal Medicine, Yale University School of Medicine, 300 Cedar Street, New Haven, Connecticut, 06520, USA
| | - Yuliya Afinogenova
- Section of Rheumatology, Allergy & Immunology, Department of Internal Medicine, Yale University School of Medicine, 300 Cedar Street, New Haven, Connecticut, 06520, USA
| | - Elena Zidan
- Department of Internal Medicine, Bridgeport Hospital - Yale New Haven Health, Bridgeport, CT, 06610, USA
| | - Jason Kwah
- Section of Rheumatology, Allergy & Immunology, Department of Internal Medicine, Yale University School of Medicine, 300 Cedar Street, New Haven, Connecticut, 06520, USA
| | - Armand Russo
- Section of Hematology and Oncology, Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, 06520, USA
| | - Mark Mamula
- Section of Rheumatology, Allergy & Immunology, Department of Internal Medicine, Yale University School of Medicine, 300 Cedar Street, New Haven, Connecticut, 06520, USA
| | - Florence Ida Hsu
- Section of Rheumatology, Allergy & Immunology, Department of Internal Medicine, Yale University School of Medicine, 300 Cedar Street, New Haven, Connecticut, 06520, USA
| | - Jason Catanzaro
- Section of Pulmonary, Allergy, Immunology and Sleep Medicine, Department of Pediatrics, Yale University School of Medicine, New Haven, Connecticut, 06520, USA
| | - Michael Racke
- Quest Diagnostics, 500 Plaza Dr, Secaucus, NJ, 07094, USA
| | - Richard Bucala
- Section of Rheumatology, Allergy & Immunology, Department of Internal Medicine, Yale University School of Medicine, 300 Cedar Street, New Haven, Connecticut, 06520, USA
| | - Craig Wilen
- Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut, 06516, USA
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, Connecticut, 06516, USA
| | - Insoo Kang
- Section of Rheumatology, Allergy & Immunology, Department of Internal Medicine, Yale University School of Medicine, 300 Cedar Street, New Haven, Connecticut, 06520, USA.
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Huston NC, Wan H, de Cesaris Araujo Tavares R, Wilen C, Pyle AM. Comprehensive in-vivo secondary structure of the SARS-CoV-2 genome reveals novel regulatory motifs and mechanisms. bioRxiv 2020:2020.07.10.197079. [PMID: 32676598 PMCID: PMC7359520 DOI: 10.1101/2020.07.10.197079] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
SARS-CoV-2 is the positive-sense RNA virus that causes COVID-19, a disease that has triggered a major human health and economic crisis. The genome of SARS-CoV-2 is unique among viral RNAs in its vast potential to form stable RNA structures and yet, as much as 97% of its 30 kilobases have not been structurally explored in the context of a viral infection. Our limited knowledge of SARS-CoV-2 genomic architecture is a fundamental limitation to both our mechanistic understanding of coronavirus life cycle and the development of COVID-19 RNA-based therapeutics. Here, we apply a novel long amplicon strategy to determine for the first time the secondary structure of the SARS-CoV-2 RNA genome probed in infected cells. In addition to the conserved structural motifs at the viral termini, we report new structural features like a conformationally flexible programmed ribosomal frameshifting pseudoknot, and a host of novel RNA structures, each of which highlights the importance of studying viral structures in their native genomic context. Our in-depth structural analysis reveals extensive networks of well-folded RNA structures throughout Orf1ab and reveals new aspects of SARS-CoV-2 genome architecture that distinguish it from other single-stranded, positive-sense RNA viruses. Evolutionary analysis of RNA structures in SARS-CoV-2 shows that several features of its genomic structure are conserved across beta coronaviruses and we pinpoint individual regions of well-folded RNA structure that merit downstream functional analysis. The native, complete secondary structure of SAR-CoV-2 presented here is a roadmap that will facilitate focused studies on mechanisms of replication, translation and packaging, and guide the identification of new RNA drug targets against COVID-19.
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Affiliation(s)
- Nicholas C. Huston
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, USA
| | - Han Wan
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT, USA
| | | | - Craig Wilen
- Department of Laboratory Medicine, Yale School of Medicine, New Haven, CT, USA
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Anna Marie Pyle
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT, USA
- Department of Chemistry, Yale University, New Haven, CT, USA
- Howard Hughes Medical Institute, Chevy Chase, MD, USA
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3
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Farhadian S, Glick LR, Vogels CBF, Thomas J, Chiarella J, Casanovas-Massana A, Zhou J, Odio C, Vijayakumar P, Geng B, Fournier J, Bermejo S, Fauver JR, Alpert T, Wyllie AL, Turcotte C, Steinle M, Paczkowski P, Dela Cruz C, Wilen C, Ko AI, MacKay S, Grubaugh ND, Spudich S, Barakat LA. Acute encephalopathy with elevated CSF inflammatory markers as the initial presentation of COVID-19. BMC Neurol 2020; 20:248. [PMID: 32552792 PMCID: PMC7301053 DOI: 10.1186/s12883-020-01812-2] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 06/01/2020] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND COVID-19 is caused by the severe acute respiratory syndrome virus SARS-CoV-2. It is widely recognized as a respiratory pathogen, but neurologic complications can be the presenting manifestation in a subset of infected patients. CASE PRESENTATION We describe a 78-year old immunocompromised woman who presented with altered mental status after witnessed seizure-like activity at home. She was found to have SARS-CoV-2 infection and associated neuroinflammation. In this case, we undertake the first detailed analysis of cerebrospinal fluid (CSF) cytokines during COVID-19 infection and find a unique pattern of inflammation in CSF, but no evidence of viral neuroinvasion. CONCLUSION Our findings suggest that neurologic symptoms such as encephalopathy and seizures may be the initial presentation of COVID-19. Central nervous system inflammation may associate with neurologic manifestations of disease.
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Affiliation(s)
- Shelli Farhadian
- Department of Internal Medicine, Section of Infectious Diseases, Yale School of Medicine, New Haven, CT, 06510, USA.
- Department of Neurology, Yale School of Medicine, New Haven, CT, 06510, USA.
| | - Laura R Glick
- Department of Internal Medicine, Yale School of Medicine, New Haven, CT, 06510, USA
| | - Chantal B F Vogels
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, 06510, USA
| | - Jared Thomas
- Department of Internal Medicine, Yale School of Medicine, New Haven, CT, 06510, USA
| | - Jennifer Chiarella
- Department of Neurology, Yale School of Medicine, New Haven, CT, 06510, USA
| | - Arnau Casanovas-Massana
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, 06510, USA
| | | | - Camila Odio
- Department of Internal Medicine, Yale School of Medicine, New Haven, CT, 06510, USA
| | - Pavithra Vijayakumar
- Department of Internal Medicine, Yale School of Medicine, New Haven, CT, 06510, USA
| | - Bertie Geng
- Department of Internal Medicine, Yale School of Medicine, New Haven, CT, 06510, USA
| | - John Fournier
- Department of Internal Medicine, Section of Infectious Diseases, Yale School of Medicine, New Haven, CT, 06510, USA
| | - Santos Bermejo
- Department of Internal Medicine, Section of Pulmonary, Critical Care, and Sleep Medicine, Yale School of Medicine, New Haven, CT, 06510, USA
| | - Joseph R Fauver
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, 06510, USA
| | - Tara Alpert
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, 06510, USA
| | - Anne L Wyllie
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, 06510, USA
| | | | | | | | - Charles Dela Cruz
- Department of Internal Medicine, Section of Pulmonary, Critical Care, and Sleep Medicine, Yale School of Medicine, New Haven, CT, 06510, USA
| | - Craig Wilen
- Department of Laboratory Medicine, Yale School of Medicine, New Haven, CT, 06510, USA
| | - Albert I Ko
- Department of Internal Medicine, Section of Infectious Diseases, Yale School of Medicine, New Haven, CT, 06510, USA
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, 06510, USA
| | | | - Nathan D Grubaugh
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, 06510, USA
| | - Serena Spudich
- Department of Neurology, Yale School of Medicine, New Haven, CT, 06510, USA
| | - Lydia Aoun Barakat
- Department of Internal Medicine, Section of Infectious Diseases, Yale School of Medicine, New Haven, CT, 06510, USA
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4
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Farhadian S, Glick LR, Vogels CBF, Thomas J, Chiarella J, Casanovas-Massana A, Zhou J, Odio C, Vijayakumar P, Geng B, Fournier J, Bermejo S, Fauver JR, Alpert T, Wyllie AL, Turcotte C, Steinle M, Paczkowski P, Cruz CD, Wilen C, Ko AI, MacKay S, Grubaugh ND, Spudich S, Aoun Barakat L. Acute encephalopathy with elevated CSF inflammatory markers as the initial presentation of COVID-19. Res Sq 2020:rs.3.rs-28583. [PMID: 32702723 PMCID: PMC7336693 DOI: 10.21203/rs.3.rs-28583/v1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
BACKGROUND COVID-19 is caused by the severe acute respiratory syndrome virus SARS-CoV-2. It is widely recognized as a respiratory pathogen, but neurologic complications can be the presenting manifestation in a subset of infected patients. CASE PRESENTATION We describe a 78-year old immunocompromised woman who presented with altered mental status after witnessed seizure-like activity at home. She was found to have SARS-CoV-2 infection and associated neuroinflammation. In this case, we undertake the first detailed analysis of cerebrospinal fluid (CSF) cytokines during COVID-19 infection and find a unique pattern of inflammation in CSF, but no evidence of viral neuroinvasion. CONCLUSION Our findings suggest that neurologic symptoms such as encephalopathy and seizures may be the initial presentation of COVID-19. Central nervous system inflammation may associate with neurologic manifestations of disease.
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5
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Opremcak A, Pechenezhskiy IV, Howington C, Christensen BG, Beck MA, Leonard E, Suttle J, Wilen C, Nesterov KN, Ribeill GJ, Thorbeck T, Schlenker F, Vavilov MG, Plourde BLT, McDermott R. Measurement of a superconducting qubit with a microwave photon counter. Science 2018; 361:1239-1242. [DOI: 10.1126/science.aat4625] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 07/17/2018] [Indexed: 11/02/2022]
Affiliation(s)
- A. Opremcak
- Department of Physics, University of Wisconsin–Madison, Madison, WI 53706, USA
| | - I. V. Pechenezhskiy
- Department of Physics, University of Wisconsin–Madison, Madison, WI 53706, USA
| | - C. Howington
- Department of Physics, Syracuse University, Syracuse, NY 13244, USA
| | - B. G. Christensen
- Department of Physics, University of Wisconsin–Madison, Madison, WI 53706, USA
| | - M. A. Beck
- Department of Physics, University of Wisconsin–Madison, Madison, WI 53706, USA
| | - E. Leonard
- Department of Physics, University of Wisconsin–Madison, Madison, WI 53706, USA
| | - J. Suttle
- Department of Physics, University of Wisconsin–Madison, Madison, WI 53706, USA
| | - C. Wilen
- Department of Physics, University of Wisconsin–Madison, Madison, WI 53706, USA
| | - K. N. Nesterov
- Department of Physics, University of Wisconsin–Madison, Madison, WI 53706, USA
| | - G. J. Ribeill
- Department of Physics, University of Wisconsin–Madison, Madison, WI 53706, USA
| | - T. Thorbeck
- Department of Physics, University of Wisconsin–Madison, Madison, WI 53706, USA
| | - F. Schlenker
- Department of Physics, University of Wisconsin–Madison, Madison, WI 53706, USA
| | - M. G. Vavilov
- Department of Physics, University of Wisconsin–Madison, Madison, WI 53706, USA
| | - B. L. T. Plourde
- Department of Physics, Syracuse University, Syracuse, NY 13244, USA
| | - R. McDermott
- Department of Physics, University of Wisconsin–Madison, Madison, WI 53706, USA
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6
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O’Brien M, Manches O, Wilen C, Gopal R, Huq R, Wu V, Sunseri N, Bhardwaj N. CD4 Receptor is a Key Determinant of Divergent HIV-1 Sensing by Plasmacytoid Dendritic Cells. PLoS Pathog 2016; 12:e1005553. [PMID: 27082754 PMCID: PMC4833349 DOI: 10.1371/journal.ppat.1005553] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 03/14/2016] [Indexed: 11/26/2022] Open
Abstract
Plasmacytoid dendritic cells (pDC) are innate immune cells that sense viral nucleic acids through endosomal Toll-like receptor (TLR) 7/9 to produce type I interferon (IFN) and to differentiate into potent antigen presenting cells (APC). Engagement of TLR7/9 in early endosomes appears to trigger the IRF7 pathway for IFN production whereas engagement in lysosomes seems to trigger the NF-κB pathway for maturation into APC. We showed previously that HIV-1 (HIV) localizes predominantly to early endosomes, not lysosomes, and mainly stimulate IRF7 rather than NF-κB signaling pathways in pDC. This divergent signaling may contribute to disease progression through production of pro-apoptotic and pro-inflammatory IFN and inadequate maturation of pDCs. We now demonstrate that HIV virions may be re-directed to lysosomes for NF-κB signaling by either pseudotyping HIV with influenza hemagglutinin envelope or modification of CD4 mediated-intracellular trafficking. These data suggest that HIV envelope-CD4 receptor interactions drive pDC activation toward an immature IFN producing phenotype rather than differentiation into a mature dendritic cell phenotype. Plasmacytoid dendritic cells (pDC) are innate immune cells that are specialized to produce type I interferon (IFN) and to activate adaptive immune responses. Although IFN is an anti-viral cytokine, it may contribute more to pathogenesis than to protection during chronic viral infections, including chronic HIV infection. pDC sense HIV to produce abundant IFN but minimal NF- κB–dependent production of TNFα and minimal up-regulation of co-stimulatory molecules, suggesting that HIV promotes pDC to become interferon producing cells (IPC) rather than antigen presenting cells (APC). Here, we use florescent HIV virions pseudotyped with influenza hemagglutinin (HA) envelope and a cell system expressing CD4 molecules with modified intracellular trafficking. We found that HIV virions pseudotyped with HA stimulate pDC to mature, similar to influenza-stimulated pDC, and traffic intracellularly similarly to influenza. We also find that CD4-mediated intracellular trafficking guides HIV trafficking and downstream signaling. Our study presents new and important findings which demonstrate that divergent HIV sensing by pDC to produce IFN, rather than to become mature antigen presenting cells, is mediated specifically by CD4-HIV envelope interactions.
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Affiliation(s)
- Meagan O’Brien
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
- * E-mail: Meagan.O’ (MO); (OM)
| | - Olivier Manches
- Division of Hematology and Oncology, Hess Center for Science and Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
- * E-mail: Meagan.O’ (MO); (OM)
| | - Craig Wilen
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Ramya Gopal
- Division of Hematology and Oncology, Hess Center for Science and Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Rumana Huq
- Microscopy Shared Resource Facility, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Vernon Wu
- Division of Hematology and Oncology, Hess Center for Science and Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Nicole Sunseri
- Department of Pediatrics, the University of Chicago, Chicago, Illinois, United States of America
| | - Nina Bhardwaj
- Division of Hematology and Oncology, Hess Center for Science and Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
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7
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Doench JG, Fusi N, Sullender M, Hegde M, Vaimberg EW, Donovan KF, Smith I, Tothova Z, Wilen C, Orchard R, Virgin HW, Listgarten J, Root DE. Optimized sgRNA design to maximize activity and minimize off-target effects of CRISPR-Cas9. Nat Biotechnol 2016; 34:184-191. [PMID: 26780180 PMCID: PMC4744125 DOI: 10.1038/nbt.3437] [Citation(s) in RCA: 2386] [Impact Index Per Article: 298.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Accepted: 11/19/2015] [Indexed: 12/12/2022]
Abstract
CRISPR-Cas9-based genetic screens are a powerful new tool in biology. By simply altering the sequence of the single-guide RNA (sgRNA), one can reprogram Cas9 to target different sites in the genome with relative ease, but the on-target activity and off-target effects of individual sgRNAs can vary widely. Here, we use recently devised sgRNA design rules to create human and mouse genome-wide libraries, perform positive and negative selection screens and observe that the use of these rules produced improved results. Additionally, we profile the off-target activity of thousands of sgRNAs and develop a metric to predict off-target sites. We incorporate these findings from large-scale, empirical data to improve our computational design rules and create optimized sgRNA libraries that maximize on-target activity and minimize off-target effects to enable more effective and efficient genetic screens and genome engineering.
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Affiliation(s)
- John G Doench
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Nicolo Fusi
- Microsoft Research New England, Cambridge, Massachusetts, USA
| | - Meagan Sullender
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Mudra Hegde
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Emma W Vaimberg
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | | | - Ian Smith
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Zuzana Tothova
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
- Dana Farber Cancer Institute, Division of Hematologic Malignancies, Boston, Massachusetts, USA
| | - Craig Wilen
- Washington University School of Medicine, Department of Pathology and Immunology, St. Louis, Missouri, USA
| | - Robert Orchard
- Washington University School of Medicine, Department of Pathology and Immunology, St. Louis, Missouri, USA
| | - Herbert W Virgin
- Washington University School of Medicine, Department of Pathology and Immunology, St. Louis, Missouri, USA
| | | | - David E Root
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
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8
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Monaco C, Gootenberg D, Zhao G, Lim E, Ghebremichael M, Baldridge M, Wilen C, Handley S, Flagg M, Siedner M, Norman J, Keller B, Lankowski A, Wang D, Kwon D, Virgin H. Expanded Enteric Virome and Altered Bacterial Microbiome in AIDS. Open Forum Infect Dis 2015. [DOI: 10.1093/ofid/ofv133.471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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9
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Gan J, Zhu Y, Wilen C, Pittenger D, Crowley D. Effect of planting covers on herbicide persistence in landscape soils. Environ Sci Technol 2003; 37:2775-2779. [PMID: 12854718 DOI: 10.1021/es026259u] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Recent monitoring shows that the majority of urban streams in the United States are contaminated by pesticide residues, and the contamination is mainly due to runoff from residential landscapes. In this study we evaluated the effect of landscape planting on persistence of the herbicides 2,4-D and dicamba in soil under laboratory conditions. The herbicides exhibited substantially different persistence in the same soil type that had been subjected to different planting practices for about 6 years. In the 0-10 cm surface layer, the half-life of 2,4-D was 30.7 d in soil under trees, which was about 20 times longer than in soil planted with turf grass (1.6 d). The difference in 2,4-D persistence was closely correlated to the number of 2,4-D-degrading bacteria that had evolved in the soils. The half-life of dicamba was much longer in soil under a tree canopy (149 d) than in mulched soil (7.9 d). The rate of dicamba degradation was proportional to soil organic matter content. This study indicates that planting practices can modify soil chemical properties and microbial activity and may further affect pesticide runoff potential by influencing pesticide degradation. Characterizing pesticide behavior as a function of planting covers may improve our understanding of pesticide runoff in urban environments and also help to identify strategies for minimizing pesticide contamination to urban streams.
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Affiliation(s)
- J Gan
- Department of Environmental Sciences, University of California, Riverside, California 92521, USA.
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