Precision engineering for PRRSV resistance in pigs: Macrophages from genome edited pigs lacking CD163 SRCR5 domain are fully resistant to both PRRSV genotypes while maintaining biological function

Porcine Reproductive and Respiratory Syndrome (PRRS) is a panzootic infectious disease of pigs, causing major economic losses to the world-wide pig industry. PRRS manifests differently in pigs of all ages but primarily causes late-term abortions and stillbirths in sows and respiratory disease in pig...

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Veröffentlicht in:PLoS pathogens 2017-02, Vol.13 (2), p.e1006206-e1006206
Hauptverfasser: Burkard, Christine, Lillico, Simon G, Reid, Elizabeth, Jackson, Ben, Mileham, Alan J, Ait-Ali, Tahar, Whitelaw, C Bruce A, Archibald, Alan L
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container_title PLoS pathogens
container_volume 13
creator Burkard, Christine
Lillico, Simon G
Reid, Elizabeth
Jackson, Ben
Mileham, Alan J
Ait-Ali, Tahar
Whitelaw, C Bruce A
Archibald, Alan L
description Porcine Reproductive and Respiratory Syndrome (PRRS) is a panzootic infectious disease of pigs, causing major economic losses to the world-wide pig industry. PRRS manifests differently in pigs of all ages but primarily causes late-term abortions and stillbirths in sows and respiratory disease in piglets. The causative agent of the disease is the positive-strand RNA PRRS virus (PRRSV). PRRSV has a narrow host cell tropism, limited to cells of the monocyte/macrophage lineage. CD163 has been described as a fusion receptor for PRRSV, whereby the scavenger receptor cysteine-rich domain 5 (SRCR5) region was shown to be an interaction site for the virus in vitro. CD163 is expressed at high levels on the surface of macrophages, particularly in the respiratory system. Here we describe the application of CRISPR/Cas9 to pig zygotes, resulting in the generation of pigs with a deletion of Exon 7 of the CD163 gene, encoding SRCR5. Deletion of SRCR5 showed no adverse effects in pigs maintained under standard husbandry conditions with normal growth rates and complete blood counts observed. Pulmonary alveolar macrophages (PAMs) and peripheral blood monocytes (PBMCs) were isolated from the animals and assessed in vitro. Both PAMs and macrophages obtained from PBMCs by CSF1 stimulation (PMMs) show the characteristic differentiation and cell surface marker expression of macrophages of the respective origin. Expression and correct folding of the SRCR5 deletion CD163 on the surface of macrophages and biological activity of the protein as hemoglobin-haptoglobin scavenger was confirmed. Challenge of both PAMs and PMMs with PRRSV genotype 1, subtypes 1, 2, and 3 and PMMs with PRRSV genotype 2 showed complete resistance to viral infections assessed by replication. Confocal microscopy revealed the absence of replication structures in the SRCR5 CD163 deletion macrophages, indicating an inhibition of infection prior to gene expression, i.e. at entry/fusion or unpacking stages.
doi_str_mv 10.1371/journal.ppat.1006206
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PRRS manifests differently in pigs of all ages but primarily causes late-term abortions and stillbirths in sows and respiratory disease in piglets. The causative agent of the disease is the positive-strand RNA PRRS virus (PRRSV). PRRSV has a narrow host cell tropism, limited to cells of the monocyte/macrophage lineage. CD163 has been described as a fusion receptor for PRRSV, whereby the scavenger receptor cysteine-rich domain 5 (SRCR5) region was shown to be an interaction site for the virus in vitro. CD163 is expressed at high levels on the surface of macrophages, particularly in the respiratory system. Here we describe the application of CRISPR/Cas9 to pig zygotes, resulting in the generation of pigs with a deletion of Exon 7 of the CD163 gene, encoding SRCR5. Deletion of SRCR5 showed no adverse effects in pigs maintained under standard husbandry conditions with normal growth rates and complete blood counts observed. Pulmonary alveolar macrophages (PAMs) and peripheral blood monocytes (PBMCs) were isolated from the animals and assessed in vitro. Both PAMs and macrophages obtained from PBMCs by CSF1 stimulation (PMMs) show the characteristic differentiation and cell surface marker expression of macrophages of the respective origin. Expression and correct folding of the SRCR5 deletion CD163 on the surface of macrophages and biological activity of the protein as hemoglobin-haptoglobin scavenger was confirmed. Challenge of both PAMs and PMMs with PRRSV genotype 1, subtypes 1, 2, and 3 and PMMs with PRRSV genotype 2 showed complete resistance to viral infections assessed by replication. 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This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited: Burkard C, Lillico SG, Reid E, Jackson B, Mileham AJ, Ait-Ali T, et al. (2017) Precision engineering for PRRSV resistance in pigs: Macrophages from genome edited pigs lacking CD163 SRCR5 domain are fully resistant to both PRRSV genotypes while maintaining biological function. PLoS Pathog 13(2): e1006206. doi:10.1371/journal.ppat.1006206</rights><rights>2017 Burkard et al 2017 Burkard et al</rights><rights>2017 Public Library of Science. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited: Burkard C, Lillico SG, Reid E, Jackson B, Mileham AJ, Ait-Ali T, et al. (2017) Precision engineering for PRRSV resistance in pigs: Macrophages from genome edited pigs lacking CD163 SRCR5 domain are fully resistant to both PRRSV genotypes while maintaining biological function. 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PRRS manifests differently in pigs of all ages but primarily causes late-term abortions and stillbirths in sows and respiratory disease in piglets. The causative agent of the disease is the positive-strand RNA PRRS virus (PRRSV). PRRSV has a narrow host cell tropism, limited to cells of the monocyte/macrophage lineage. CD163 has been described as a fusion receptor for PRRSV, whereby the scavenger receptor cysteine-rich domain 5 (SRCR5) region was shown to be an interaction site for the virus in vitro. CD163 is expressed at high levels on the surface of macrophages, particularly in the respiratory system. Here we describe the application of CRISPR/Cas9 to pig zygotes, resulting in the generation of pigs with a deletion of Exon 7 of the CD163 gene, encoding SRCR5. Deletion of SRCR5 showed no adverse effects in pigs maintained under standard husbandry conditions with normal growth rates and complete blood counts observed. Pulmonary alveolar macrophages (PAMs) and peripheral blood monocytes (PBMCs) were isolated from the animals and assessed in vitro. Both PAMs and macrophages obtained from PBMCs by CSF1 stimulation (PMMs) show the characteristic differentiation and cell surface marker expression of macrophages of the respective origin. Expression and correct folding of the SRCR5 deletion CD163 on the surface of macrophages and biological activity of the protein as hemoglobin-haptoglobin scavenger was confirmed. Challenge of both PAMs and PMMs with PRRSV genotype 1, subtypes 1, 2, and 3 and PMMs with PRRSV genotype 2 showed complete resistance to viral infections assessed by replication. Confocal microscopy revealed the absence of replication structures in the SRCR5 CD163 deletion macrophages, indicating an inhibition of infection prior to gene expression, i.e. at entry/fusion or unpacking stages.</description><subject>Abortion</subject><subject>Animals</subject><subject>Antigens, CD - genetics</subject><subject>Antigens, Differentiation, Myelomonocytic - genetics</subject><subject>Biology and Life Sciences</subject><subject>Biomedical engineering</subject><subject>Blotting, Western</subject><subject>Flow Cytometry</subject><subject>Fluorescent Antibody Technique</subject><subject>Funding</subject><subject>Gene Editing - methods</subject><subject>Gene expression</subject><subject>Genetic aspects</subject><subject>Genome</subject><subject>Genomes</subject><subject>Genotype</subject><subject>Genotype &amp; phenotype</subject><subject>Genotypes</subject><subject>Health aspects</subject><subject>Hogs</subject><subject>Identification and classification</subject><subject>Infections</subject><subject>Infectious diseases</subject><subject>Macrophages - immunology</subject><subject>Macrophages - metabolism</subject><subject>Macrophages - virology</subject><subject>Medicine and Health Sciences</subject><subject>Microscopy, Confocal</subject><subject>Polymerase Chain Reaction</subject><subject>Porcine reproductive and respiratory syndrome</subject><subject>Porcine Reproductive and Respiratory Syndrome - immunology</subject><subject>Porcine respiratory and reproductive syndrome virus - immunology</subject><subject>Receptors, Cell Surface - deficiency</subject><subject>Receptors, Cell Surface - genetics</subject><subject>Research and Analysis Methods</subject><subject>Respiratory diseases</subject><subject>Respiratory system</subject><subject>Risk factors</subject><subject>Studies</subject><subject>Swine</subject><subject>Viral infections</subject><issn>1553-7374</issn><issn>1553-7366</issn><issn>1553-7374</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>BENPR</sourceid><sourceid>DOA</sourceid><recordid>eNqVk81u1DAQgCMEoqXwBggscYHDLnbs2AkHpGr5q1Sg2gJXy3EmWZfEDrYX6PvxYDhtWnVRLyiKEsXffDNjZ7LsMcFLQgV5eea23qp-OY4qLgnGPMf8TrZPioIuBBXs7o33vexBCGcYM0IJv5_t5WVOSc7ZfvbnxIM2wTiLwHbGAnhjO9Q6j07W69NvyEMwISqrARmLRtOFV-ij0t6NG9VBQK13A-rAugEQNCZCcwGhXunvk2n1hnCKTterdYEaN6gkUR5Qu-3782t5RNGh2sXNnHTyxfMx6X9tTA9oCovpnoS1cb3rjFZ9klgdU-kPs3ut6gM8mp8H2dd3b7-sPiyOP78_Wh0eL7TIRVxUdVkwwXktdIUFq3Td0rykmPOyELhpK1IqqphqscCFqjhpOAYGvKAV1lq39CB7eukdexfkfABBklKUWOSsook4uiQap87k6M2g_Ll0ysiLD853UvlodA9S01oxhnGpc8YqXqmcYEhViKYqySQ7yF7P2bb1AI0GG73qd6S7K9ZsZOd-yoLmeVlOxTyfBd792EKIcjBBQ98rC257UXdeiNQ8Tuizf9Dbu5upTqUGjG1dyqsnqTxM6yXhTJBELW-h0tXAYLSz0KYj3Q14sROQmAi_Y6e2Icij0_V_sJ92WXbJpr81BA_t9d4RLKcZumpSTjMk5xlKYU9u7vt10NXQ0L-vdBjK</recordid><startdate>20170223</startdate><enddate>20170223</enddate><creator>Burkard, Christine</creator><creator>Lillico, Simon G</creator><creator>Reid, Elizabeth</creator><creator>Jackson, Ben</creator><creator>Mileham, Alan J</creator><creator>Ait-Ali, Tahar</creator><creator>Whitelaw, C Bruce A</creator><creator>Archibald, Alan L</creator><general>Public Library of Science</general><general>Public Library of Science (PLoS)</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>ISN</scope><scope>ISR</scope><scope>3V.</scope><scope>7QL</scope><scope>7U9</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8FE</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>H94</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>LK8</scope><scope>M0S</scope><scope>M1P</scope><scope>M7P</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>7X8</scope><scope>5PM</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0003-4806-0902</orcidid><orcidid>https://orcid.org/0000-0001-9213-1830</orcidid><orcidid>https://orcid.org/0000-0002-5101-2277</orcidid><orcidid>https://orcid.org/0000-0002-0471-3230</orcidid></search><sort><creationdate>20170223</creationdate><title>Precision engineering for PRRSV resistance in pigs: Macrophages from genome edited pigs lacking CD163 SRCR5 domain are fully resistant to both PRRSV genotypes while maintaining biological function</title><author>Burkard, Christine ; 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PRRS manifests differently in pigs of all ages but primarily causes late-term abortions and stillbirths in sows and respiratory disease in piglets. The causative agent of the disease is the positive-strand RNA PRRS virus (PRRSV). PRRSV has a narrow host cell tropism, limited to cells of the monocyte/macrophage lineage. CD163 has been described as a fusion receptor for PRRSV, whereby the scavenger receptor cysteine-rich domain 5 (SRCR5) region was shown to be an interaction site for the virus in vitro. CD163 is expressed at high levels on the surface of macrophages, particularly in the respiratory system. Here we describe the application of CRISPR/Cas9 to pig zygotes, resulting in the generation of pigs with a deletion of Exon 7 of the CD163 gene, encoding SRCR5. Deletion of SRCR5 showed no adverse effects in pigs maintained under standard husbandry conditions with normal growth rates and complete blood counts observed. Pulmonary alveolar macrophages (PAMs) and peripheral blood monocytes (PBMCs) were isolated from the animals and assessed in vitro. Both PAMs and macrophages obtained from PBMCs by CSF1 stimulation (PMMs) show the characteristic differentiation and cell surface marker expression of macrophages of the respective origin. Expression and correct folding of the SRCR5 deletion CD163 on the surface of macrophages and biological activity of the protein as hemoglobin-haptoglobin scavenger was confirmed. Challenge of both PAMs and PMMs with PRRSV genotype 1, subtypes 1, 2, and 3 and PMMs with PRRSV genotype 2 showed complete resistance to viral infections assessed by replication. Confocal microscopy revealed the absence of replication structures in the SRCR5 CD163 deletion macrophages, indicating an inhibition of infection prior to gene expression, i.e. at entry/fusion or unpacking stages.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>28231264</pmid><doi>10.1371/journal.ppat.1006206</doi><orcidid>https://orcid.org/0000-0003-4806-0902</orcidid><orcidid>https://orcid.org/0000-0001-9213-1830</orcidid><orcidid>https://orcid.org/0000-0002-5101-2277</orcidid><orcidid>https://orcid.org/0000-0002-0471-3230</orcidid><oa>free_for_read</oa></addata></record>
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subjects Abortion
Animals
Antigens, CD - genetics
Antigens, Differentiation, Myelomonocytic - genetics
Biology and Life Sciences
Biomedical engineering
Blotting, Western
Flow Cytometry
Fluorescent Antibody Technique
Funding
Gene Editing - methods
Gene expression
Genetic aspects
Genome
Genomes
Genotype
Genotype & phenotype
Genotypes
Health aspects
Hogs
Identification and classification
Infections
Infectious diseases
Macrophages - immunology
Macrophages - metabolism
Macrophages - virology
Medicine and Health Sciences
Microscopy, Confocal
Polymerase Chain Reaction
Porcine reproductive and respiratory syndrome
Porcine Reproductive and Respiratory Syndrome - immunology
Porcine respiratory and reproductive syndrome virus - immunology
Receptors, Cell Surface - deficiency
Receptors, Cell Surface - genetics
Research and Analysis Methods
Respiratory diseases
Respiratory system
Risk factors
Studies
Swine
Viral infections
title Precision engineering for PRRSV resistance in pigs: Macrophages from genome edited pigs lacking CD163 SRCR5 domain are fully resistant to both PRRSV genotypes while maintaining biological function
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-07T20%3A21%3A14IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-gale_plos_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Precision%20engineering%20for%20PRRSV%20resistance%20in%20pigs:%20Macrophages%20from%20genome%20edited%20pigs%20lacking%20CD163%20SRCR5%20domain%20are%20fully%20resistant%20to%20both%20PRRSV%20genotypes%20while%20maintaining%20biological%20function&rft.jtitle=PLoS%20pathogens&rft.au=Burkard,%20Christine&rft.date=2017-02-23&rft.volume=13&rft.issue=2&rft.spage=e1006206&rft.epage=e1006206&rft.pages=e1006206-e1006206&rft.issn=1553-7374&rft.eissn=1553-7374&rft_id=info:doi/10.1371/journal.ppat.1006206&rft_dat=%3Cgale_plos_%3EA493816471%3C/gale_plos_%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=1878072493&rft_id=info:pmid/28231264&rft_galeid=A493816471&rft_doaj_id=oai_doaj_org_article_c3ba44008c244969a210e0df7d981249&rfr_iscdi=true