{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T02:49:01Z","timestamp":1787021341813,"version":"build-2736575974"},"reference-count":76,"publisher":"The Company of Biologists","issue":"3","license":[{"start":{"date-parts":[[2023,3,13]],"date-time":"2023-03-13T00:00:00Z","timestamp":1678665600000},"content-version":"vor","delay-in-days":12,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"name":"Medical Research Council","award":["MR\/M012328\/2"],"award-info":[{"award-number":["MR\/M012328\/2"]}]},{"name":"Medical Research Council","award":["MRNO2995X\/1"],"award-info":[{"award-number":["MRNO2995X\/1"]}]},{"DOI":"10.13039\/501100000858","name":"University of Sheffield","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100000858","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,3,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>People with activated PI3 kinase delta syndrome 1 (APDS1) suffer from immune deficiency and severe bronchiectasis. APDS1 is caused by dominant activating mutations of the PIK3CD gene that encodes the PI3 kinase delta (PI3K\u03b4) catalytic subunit. Despite the importance of innate immunity defects in bronchiectasis, there has been limited investigation of neutrophils or macrophages in APDS1 patients or mouse models. Zebrafish embryos provide an ideal system to study neutrophils and macrophages. We used CRISPR-Cas9 and CRISPR-Cpf1, with oligonucleotide-directed homologous repair, to engineer zebrafish equivalents of the two most prevalent human APDS1 disease mutations. These zebrafish pik3cd alleles dominantly caused excessive neutrophilic inflammation in a tail-fin injury model. They also resulted in total body neutrophilia in the absence of any inflammatory stimulus but normal numbers of macrophages. Exposure of zebrafish to the PI3K\u03b4 inhibitor CAL-101 reversed the total body neutrophilia. There was no apparent defect in neutrophil maturation or migration, and tail-fin regeneration was unimpaired. Overall, the finding is of enhanced granulopoeisis, in the absence of notable phenotypic change in neutrophils and macrophages.<\/jats:p>","DOI":"10.1242\/dmm.049841","type":"journal-article","created":{"date-parts":[[2023,2,20]],"date-time":"2023-02-20T04:24:16Z","timestamp":1676867056000},"source":"Crossref","is-referenced-by-count":9,"title":["Activated PI3K delta syndrome 1 mutations cause neutrophilia in zebrafish larvae"],"prefix":"10.1242","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9739-1540","authenticated-orcid":false,"given":"Stone","family":"Elworthy","sequence":"first","affiliation":[{"name":"University of Sheffield 1 Department of Infection, Immunity and Cardiovascular Disease , , Sheffield S10 2TN , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6227-0271","authenticated-orcid":false,"given":"Holly A.","family":"Rutherford","sequence":"additional","affiliation":[{"name":"University of Sheffield 1 Department of Infection, Immunity and Cardiovascular Disease , , Sheffield S10 2TN , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6562-8630","authenticated-orcid":false,"given":"Tomasz K.","family":"Prajsnar","sequence":"additional","affiliation":[{"name":"University of Sheffield 1 Department of Infection, Immunity and Cardiovascular Disease , , Sheffield S10 2TN , UK"},{"name":"Institute of Zoology and Biomedical Research, Jagiellonian University 2 Department of Evolutionary Immunology , , Gronostajowa 9, 30-387 Krakow , Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3299-9133","authenticated-orcid":false,"given":"No\u00e9mie M.","family":"Hamilton","sequence":"additional","affiliation":[{"name":"University of Sheffield 1 Department of Infection, Immunity and Cardiovascular Disease , , Sheffield S10 2TN , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4938-563X","authenticated-orcid":false,"given":"Katja","family":"Vogt","sequence":"additional","affiliation":[{"name":"University of Sheffield 1 Department of Infection, Immunity and Cardiovascular Disease , , Sheffield S10 2TN , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1790-1641","authenticated-orcid":false,"given":"Stephen A.","family":"Renshaw","sequence":"additional","affiliation":[{"name":"University of Sheffield 1 Department of Infection, Immunity and Cardiovascular Disease , , Sheffield S10 2TN , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6697-8648","authenticated-orcid":false,"given":"Alison M.","family":"Condliffe","sequence":"additional","affiliation":[{"name":"University of Sheffield 1 Department of Infection, Immunity and Cardiovascular Disease , , Sheffield S10 2TN , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"237","published-online":{"date-parts":[[2023,3,13]]},"reference":[{"key":"2023031309343557800_","doi-asserted-by":"publisher","first-page":"866","DOI":"10.1126\/science.1243292","article-title":"Phosphoinositide 3-kinase \u03b4 gene mutation predisposes to respiratory infection and airway damage","volume":"342","author":"Angulo","year":"2013","journal-title":"Science"},{"key":"2023031309343557800_","doi-asserted-by":"publisher","first-page":"2045","DOI":"10.1038\/s41467-017-02305-6","article-title":"Single-cell RNA-sequencing uncovers transcriptional states and fate decisions in haematopoiesis","volume":"8","author":"Athanasiadis","year":"2017","journal-title":"Nat. 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