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SP-R210 (Myo18A) Isoforms as Intrinsic Modulators of Macrophage Priming and Activation

The surfactant protein (SP-A) receptor SP-R210 has been shown to increase phagocytosis of SP-A-bound pathogens and to modulate cytokine secretion by immune cells. SP-A plays an important role in pulmonary immunity by enhancing opsonization and clearance of pathogens and by modulating macrophage infl...

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Published in:PloS one 2015-05, Vol.10 (5), p.e0126576
Main Authors: Yang, Linlin, Carrillo, Marykate, Wu, Yuchieh M, DiAngelo, Susan L, Silveyra, Patricia, Umstead, Todd M, Halstead, E Scott, Davies, Michael L, Hu, Sanmei, Floros, Joanna, McCormack, Francis X, Christensen, Neil D, Chroneos, Zissis C
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cited_by cdi_FETCH-LOGICAL-c692t-42785829989a7de91c6404c9398a396db6ab0d3752bc21a06b6b959dcd7ac2213
cites cdi_FETCH-LOGICAL-c692t-42785829989a7de91c6404c9398a396db6ab0d3752bc21a06b6b959dcd7ac2213
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container_issue 5
container_start_page e0126576
container_title PloS one
container_volume 10
creator Yang, Linlin
Carrillo, Marykate
Wu, Yuchieh M
DiAngelo, Susan L
Silveyra, Patricia
Umstead, Todd M
Halstead, E Scott
Davies, Michael L
Hu, Sanmei
Floros, Joanna
McCormack, Francis X
Christensen, Neil D
Chroneos, Zissis C
description The surfactant protein (SP-A) receptor SP-R210 has been shown to increase phagocytosis of SP-A-bound pathogens and to modulate cytokine secretion by immune cells. SP-A plays an important role in pulmonary immunity by enhancing opsonization and clearance of pathogens and by modulating macrophage inflammatory responses. Alternative splicing of the Myo18A gene results in two isoforms: SP-R210S and SP-R210L, with the latter predominantly expressed in alveolar macrophages. In this study we show that SP-A is required for optimal expression of SP-R210L on alveolar macrophages. Interestingly, pre-treatment with SP-A prepared by different methods either enhances or suppresses responsiveness to LPS, possibly due to differential co-isolation of SP-B or other proteins. We also report that dominant negative disruption of SP-R210L augments expression of receptors including SR-A, CD14, and CD36, and enhances macrophages' inflammatory response to TLR stimulation. Finally, because SP-A is known to modulate CD14, we used a variety of techniques to investigate how SP-R210 mediates the effect of SP-A on CD14. These studies revealed a novel physical association between SP-R210S, CD14, and SR-A leading to an enhanced response to LPS, and found that SP-R210L and SP-R210S regulate internalization of CD14 via distinct macropinocytosis-like mechanisms. Together, our findings support a model in which SP-R210 isoforms differentially regulate trafficking, expression, and activation of innate immune receptors on macrophages.
doi_str_mv 10.1371/journal.pone.0126576
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SP-A plays an important role in pulmonary immunity by enhancing opsonization and clearance of pathogens and by modulating macrophage inflammatory responses. Alternative splicing of the Myo18A gene results in two isoforms: SP-R210S and SP-R210L, with the latter predominantly expressed in alveolar macrophages. In this study we show that SP-A is required for optimal expression of SP-R210L on alveolar macrophages. Interestingly, pre-treatment with SP-A prepared by different methods either enhances or suppresses responsiveness to LPS, possibly due to differential co-isolation of SP-B or other proteins. We also report that dominant negative disruption of SP-R210L augments expression of receptors including SR-A, CD14, and CD36, and enhances macrophages' inflammatory response to TLR stimulation. Finally, because SP-A is known to modulate CD14, we used a variety of techniques to investigate how SP-R210 mediates the effect of SP-A on CD14. These studies revealed a novel physical association between SP-R210S, CD14, and SR-A leading to an enhanced response to LPS, and found that SP-R210L and SP-R210S regulate internalization of CD14 via distinct macropinocytosis-like mechanisms. Together, our findings support a model in which SP-R210 isoforms differentially regulate trafficking, expression, and activation of innate immune receptors on macrophages.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0126576</identifier><identifier>PMID: 25965346</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Alternative splicing ; Alternative Splicing - genetics ; Alveoli ; Biochemistry ; CD14 antigen ; CD36 antigen ; Cell activation ; Critical care ; Cytokines ; Humans ; Immune clearance ; Immune system ; Immunity ; Immunity, Innate - genetics ; Immunology ; Inflammation ; Inflammation - chemically induced ; Inflammation - genetics ; Inflammation - immunology ; Inflammatory response ; Internalization ; Isoforms ; Kinases ; Laboratories ; Lipids ; Lipopolysaccharide Receptors - genetics ; Lipopolysaccharide Receptors - metabolism ; Lipopolysaccharides ; Lipopolysaccharides - toxicity ; Lung diseases ; Macrophages ; Macrophages, Alveolar - immunology ; Macrophages, Alveolar - metabolism ; Medical research ; Medicine ; Modulators ; Myosins - genetics ; Myosins - metabolism ; Opsonization ; Pathogens ; Pediatrics ; Phagocytosis ; Physicians ; Physiology ; Priming ; Protein Isoforms - genetics ; Protein Isoforms - metabolism ; Proteins ; Pulmonary Surfactant-Associated Protein A - administration &amp; dosage ; Pulmonary Surfactant-Associated Protein A - metabolism ; Receptors ; Surfactant protein A ; Surfactants</subject><ispartof>PloS one, 2015-05, Vol.10 (5), p.e0126576</ispartof><rights>COPYRIGHT 2015 Public Library of Science</rights><rights>2015 Yang et al. This is an open access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>2015 Yang et al 2015 Yang et al</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c692t-42785829989a7de91c6404c9398a396db6ab0d3752bc21a06b6b959dcd7ac2213</citedby><cites>FETCH-LOGICAL-c692t-42785829989a7de91c6404c9398a396db6ab0d3752bc21a06b6b959dcd7ac2213</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.proquest.com/docview/1680430410/fulltextPDF?pq-origsite=primo$$EPDF$$P50$$Gproquest$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.proquest.com/docview/1680430410?pq-origsite=primo$$EHTML$$P50$$Gproquest$$Hfree_for_read</linktohtml><link.rule.ids>230,315,733,786,790,891,25783,27957,27958,37047,44625,53827,53829,75483</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/25965346$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><contributor>Rottenberg, Martin E</contributor><creatorcontrib>Yang, Linlin</creatorcontrib><creatorcontrib>Carrillo, Marykate</creatorcontrib><creatorcontrib>Wu, Yuchieh M</creatorcontrib><creatorcontrib>DiAngelo, Susan L</creatorcontrib><creatorcontrib>Silveyra, Patricia</creatorcontrib><creatorcontrib>Umstead, Todd M</creatorcontrib><creatorcontrib>Halstead, E Scott</creatorcontrib><creatorcontrib>Davies, Michael L</creatorcontrib><creatorcontrib>Hu, Sanmei</creatorcontrib><creatorcontrib>Floros, Joanna</creatorcontrib><creatorcontrib>McCormack, Francis X</creatorcontrib><creatorcontrib>Christensen, Neil D</creatorcontrib><creatorcontrib>Chroneos, Zissis C</creatorcontrib><title>SP-R210 (Myo18A) Isoforms as Intrinsic Modulators of Macrophage Priming and Activation</title><title>PloS one</title><addtitle>PLoS One</addtitle><description>The surfactant protein (SP-A) receptor SP-R210 has been shown to increase phagocytosis of SP-A-bound pathogens and to modulate cytokine secretion by immune cells. 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Performed the experiments: YMW SLD PS TMU ESH LY SH MLD ZCC. Analyzed the data: ZCC YMW PS TMU LY. Contributed reagents/materials/analysis tools: ZCC JF PS NDC FXM. Wrote the paper: ZCC. Critical manuscript reading: ZCC JF ESH TMU PS YMW NDC MLD MC LY.</notes><notes>Competing Interests: The authors have declared that no competing interests exist.</notes><abstract>The surfactant protein (SP-A) receptor SP-R210 has been shown to increase phagocytosis of SP-A-bound pathogens and to modulate cytokine secretion by immune cells. SP-A plays an important role in pulmonary immunity by enhancing opsonization and clearance of pathogens and by modulating macrophage inflammatory responses. Alternative splicing of the Myo18A gene results in two isoforms: SP-R210S and SP-R210L, with the latter predominantly expressed in alveolar macrophages. In this study we show that SP-A is required for optimal expression of SP-R210L on alveolar macrophages. Interestingly, pre-treatment with SP-A prepared by different methods either enhances or suppresses responsiveness to LPS, possibly due to differential co-isolation of SP-B or other proteins. We also report that dominant negative disruption of SP-R210L augments expression of receptors including SR-A, CD14, and CD36, and enhances macrophages' inflammatory response to TLR stimulation. Finally, because SP-A is known to modulate CD14, we used a variety of techniques to investigate how SP-R210 mediates the effect of SP-A on CD14. These studies revealed a novel physical association between SP-R210S, CD14, and SR-A leading to an enhanced response to LPS, and found that SP-R210L and SP-R210S regulate internalization of CD14 via distinct macropinocytosis-like mechanisms. Together, our findings support a model in which SP-R210 isoforms differentially regulate trafficking, expression, and activation of innate immune receptors on macrophages.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>25965346</pmid><doi>10.1371/journal.pone.0126576</doi><oa>free_for_read</oa></addata></record>
fulltext fulltext
identifier ISSN: 1932-6203
ispartof PloS one, 2015-05, Vol.10 (5), p.e0126576
issn 1932-6203
1932-6203
language eng
recordid cdi_plos_journals_1680430410
source Publicly Available Content Database; PubMed Central
subjects Alternative splicing
Alternative Splicing - genetics
Alveoli
Biochemistry
CD14 antigen
CD36 antigen
Cell activation
Critical care
Cytokines
Humans
Immune clearance
Immune system
Immunity
Immunity, Innate - genetics
Immunology
Inflammation
Inflammation - chemically induced
Inflammation - genetics
Inflammation - immunology
Inflammatory response
Internalization
Isoforms
Kinases
Laboratories
Lipids
Lipopolysaccharide Receptors - genetics
Lipopolysaccharide Receptors - metabolism
Lipopolysaccharides
Lipopolysaccharides - toxicity
Lung diseases
Macrophages
Macrophages, Alveolar - immunology
Macrophages, Alveolar - metabolism
Medical research
Medicine
Modulators
Myosins - genetics
Myosins - metabolism
Opsonization
Pathogens
Pediatrics
Phagocytosis
Physicians
Physiology
Priming
Protein Isoforms - genetics
Protein Isoforms - metabolism
Proteins
Pulmonary Surfactant-Associated Protein A - administration & dosage
Pulmonary Surfactant-Associated Protein A - metabolism
Receptors
Surfactant protein A
Surfactants
title SP-R210 (Myo18A) Isoforms as Intrinsic Modulators of Macrophage Priming and Activation
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