BACKGROUND: Chronic rhinosinusitis with nasal polyps (CRSwNP) is characterized by biased Th2 inflammation and CRS without nasal polyps (CRSsNP) by a Th1 immune response. Colonization by Staphylococcus aureus is increased in CRSwNP. We aimed to determine macrophage phenotypes in nasal mucosa of CRSwNP and CRSsNP and to examine phagocytosis of S. aureus in these pathologies. METHODS: Macrophage phenotyping was performed by immunohistochemical staining on nasal mucosa sections from 28 patients; in addition flow cytometry analysis was performed. Tissue homogenate protein levels of IFN-γ, IL-5, IL-6, IL-1β, TGF-β, eosinophil cationic protein (ECP) and total IgE were analyzed and correlated with macrophage subtypes. Phagocytosis of S. aureus was analyzed by flow cytometry. Survival of S. aureus in Thp1 cells in the presence of polarizing cytokines was studied in vitro. RESULTS: By immunohistochemical analysis more M2 macrophages were present in CRSwNP than in CRSsNP. This also was positively correlated with increased levels of IL-5, ECP and locally produced IgE and decreased levels of IL-6, IL-1β and IFN-γ. FACS analysis of dissociated nasal tissue confirmed the presence of increased numbers of M2 macrophages (CD206(+) HLADR(+) CD14(+) CD11c(+) CD20(-) ) in CRSwNP as compared to controls, while the number of M1 macrophages (CD206(-) HLADR(+) CD14(+) CD11c(int) CD16(-) CD20(-) ) was not different. Phagocytosis of S. aureus by human tissue derived macrophages was reduced in CRSwNP as compared to macrophages from the control inferior turbinates. CONCLUSIONS: Decreased phagocytosis of S. aureus and an M2 activation phenotype in CRSwNP could potentially contribute to persistence of chronic inflammation in CRSwNP.
BACKGROUND:Chronic rhinosinusitis with nasal polyps (CRSwNP) is characterized by biased Th2 inflammation and CRS without nasal polyps (CRSsNP) by a Th1 immune response. Colonization by Staphylococcus aureus is increased in CRSwNP. We aimed to determine macrophage phenotypes in nasal mucosa of CRSwNP and CRSsNP and to examine phagocytosis of S. aureus in these pathologies. METHODS: Macrophage phenotyping was performed by immunohistochemical staining on nasal mucosa sections from 28 patients; in addition flow cytometry analysis was performed. Tissue homogenate protein levels of IFN-γ, IL-5, IL-6, IL-1β, TGF-β, eosinophil cationic protein (ECP) and total IgE were analyzed and correlated with macrophage subtypes. Phagocytosis of S. aureus was analyzed by flow cytometry. Survival of S. aureus in Thp1 cells in the presence of polarizing cytokines was studied in vitro. RESULTS: By immunohistochemical analysis more M2 macrophages were present in CRSwNP than in CRSsNP. This also was positively correlated with increased levels of IL-5, ECP and locally produced IgE and decreased levels of IL-6, IL-1β and IFN-γ. FACS analysis of dissociated nasal tissue confirmed the presence of increased numbers of M2 macrophages (CD206(+) HLADR(+) CD14(+) CD11c(+) CD20(-) ) in CRSwNP as compared to controls, while the number of M1 macrophages (CD206(-) HLADR(+) CD14(+) CD11c(int) CD16(-) CD20(-) ) was not different. Phagocytosis of S. aureus by human tissue derived macrophages was reduced in CRSwNP as compared to macrophages from the control inferior turbinates. CONCLUSIONS: Decreased phagocytosis of S. aureus and an M2 activation phenotype in CRSwNP could potentially contribute to persistence of chronic inflammation in CRSwNP.
Authors: Sarah Peterson; Julie A Poposki; Deepti R Nagarkar; Regina T Chustz; Anju T Peters; Lydia A Suh; Roderick Carter; James Norton; Kathleen E Harris; Leslie C Grammer; Bruce K Tan; Rakesh K Chandra; David B Conley; Robert C Kern; Robert P Schleimer; Atsushi Kato Journal: J Allergy Clin Immunol Date: 2011-09-23 Impact factor: 10.793
Authors: Julie A Poposki; Ashraf Uzzaman; Deepti R Nagarkar; Regina T Chustz; Anju T Peters; Lydia A Suh; Roderick Carter; James Norton; Kathleen E Harris; Leslie C Grammer; Bruce K Tan; Rakesh K Chandra; David B Conley; Robert C Kern; Robert P Schleimer; Atsushi Kato Journal: J Allergy Clin Immunol Date: 2011-04-17 Impact factor: 10.793
Authors: Kathryn L Pothoven; James E Norton; Kathryn E Hulse; Lydia A Suh; Roderick G Carter; Erin Rocci; Kathleen E Harris; Stephanie Shintani-Smith; David B Conley; Rakesh K Chandra; Mark C Liu; Atsushi Kato; Nirmala Gonsalves; Leslie C Grammer; Anju T Peters; Robert C Kern; Paul J Bryce; Bruce K Tan; Robert P Schleimer Journal: J Allergy Clin Immunol Date: 2015-04-01 Impact factor: 10.793
Authors: Tetsuji Takabayashi; Atsushi Kato; Anju T Peters; Kathryn E Hulse; Lydia A Suh; Roderick Carter; James Norton; Leslie C Grammer; Bruce K Tan; Rakesh K Chandra; David B Conley; Robert C Kern; Shigeharu Fujieda; Robert P Schleimer Journal: J Allergy Clin Immunol Date: 2013-03-28 Impact factor: 10.793
Authors: Chunwei Li; Li Shi; Yan Yan; Bruce R Gordon; William M Gordon; De-Yun Wang Journal: Curr Allergy Asthma Rep Date: 2013-04 Impact factor: 4.806