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<article xsi:noNamespaceSchemaLocation="http://jats.nlm.nih.gov/publishing/1.1/xsd/JATS-journalpublishing1-mathml3.xsd" dtd-version="1.1" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><front><journal-meta><journal-id journal-id-type="publisher-id">JMDS</journal-id><journal-title-group><journal-title>Journal of Medicines Development Sciences</journal-title></journal-title-group><issn>2382-6363</issn><eissn>2382-6371</eissn><publisher><publisher-name>WHIOCE PUBLISHING PTE. LTD.</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18063/jmds.v8i1.143</article-id><article-categories><subj-group subj-group-type="heading"><subject>Article</subject></subj-group></article-categories><title>Cigarette Smoke Extract Contributes to the Inception and Aggravation of Asthmatic Inflammation by Stimulating Innate Immunity</title><url>https://artdesignp.com/journal/JMDS/8/1/10.18063/jmds.v8i1.143</url><author>KimYujin,KimJeonghyeon,MoYosep,ParkDa Eun,LeeHyun-Seung,JungJae-Woo,KangHye-Ryun</author><pub-date pub-type="publication-year"><year>2023</year></pub-date><volume>8</volume><issue>1</issue><history><date date-type="pub"><published-time>2023-08-25</published-time></date></history><abstract>Purpose:&amp;nbsp;Smoking is a risk factor for the development of asthma and worsens the long-term prognosis of asthma. This study investigated the effect of cigarette smoke extract&amp;nbsp;(CSE) on innate immune cells such as innate lymphoid cells (ILCs) and macrophages in&amp;nbsp;a murine model of induced asthma.&amp;nbsp;Methods:&amp;nbsp;Six-week-old female BALB/C mice were&amp;nbsp;exposed to ovalbumin (OVA) via an intranasal route with or without CSE for 8 weeks to&amp;nbsp;establish a chronic murine asthma model. Airway hyperresponsiveness (AHR), airway&amp;nbsp;inflammatory cells from bronchoalveolar lavage fluid, and the population of CD4+ T cells,&amp;nbsp;ILCs, and macrophages in the lungs were studied to evaluate the effect of chronic CSE&amp;nbsp;exposure on asthma.&amp;nbsp;Results:&amp;nbsp;Mice intranasally exposed to CSE along with OVA treatment&amp;nbsp;(CSE/OVA) had significantly enhanced AHR, eosinophilic inflammation, increased IL-&amp;nbsp;13 and IL-17 producing CD4+ T cells compared to mice intranasally exposed to OVA&amp;nbsp;only. On the contrary, the frequency of Foxp3+ in CD4+ T cells was reduced in the CSE/&amp;nbsp;OVA group. CSE enhanced the dendritic cell (DC) population, especially MHCII+ DC&amp;nbsp;with antigen-presenting capacity. Among ILCs, the CSE/OVA group showed a significant&amp;nbsp;increase of IL-13-producing type 2 ILCs, but not interferon-&amp;gamma;+ ILC1s and IL-17+ ILC3s.&amp;nbsp;Among macrophages, alveolar macrophage and Ym-1 and FIZZ1 positive M2 macrophage&amp;nbsp;populations were significantly induced by CSE exposure alone and when combined&amp;nbsp;with OVA treatment.&amp;nbsp;Conclusion:&amp;nbsp;In this study, we showed that long-term exposure to&amp;nbsp;cigarette smoke contributes to the inception and aggravation of asthmatic inflammation by enhancing DCs, ILC2, and M2 alveolar macrophage populations in the mouse model.</abstract><keywords/></article-meta></front><body/><back><ref-list><ref id="B1" content-type="article"><label>1</label><element-citation publication-type="journal"><p>Fahy JV, 2015, Type 2 Inflammation in Asthma - Present in Most, Absent in Many. Nat Rev Immunol, 15(1): 57&amp;ndash;65.
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