Ajay P Nayak1, Tara L Croston2, Angela R Lemons2, W T Goldsmith2, Nikki B Marshall2, Michael L Kashon2, Dori R Germolec3, Donald H Beezhold2, Brett J Green2. 1. Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, West Virginia. Electronic address: Ajay.Nayak@jefferson.edu. 2. Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, West Virginia. 3. Toxicology Branch, Division of National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina.
Abstract
BACKGROUND: Aspergillus fumigatus-induced allergic airway disease has been shown to involve conidial germination in vivo, but the immunological mechanisms remain uncharacterized. OBJECTIVE: A subchronic murine exposure model was used to examine the immunological mediators that are regulated in response to either culturable or nonculturable A fumigatus conidia. METHODS: Female B6C3F1/N mice were repeatedly dosed via inhalation with 1 × 105 viable or heat-inactivated conidia (HIC), twice per week for 13 weeks (26 exposures). Control mice inhaled high-efficiency particulate arrestor-filtered air. The influence of A fumigatus conidial germination on the pulmonary immunopathological outcomes was evaluated by flow cytometry analysis of cellular infiltration in the airways, assessment of lung messenger RNA expression, quantitative proteomics, and histopathology of whole lung tissue. RESULTS: Repeated inhalation of viable conidia, but not HIC, resulted in allergic inflammation marked by vascular remodeling, extensive eosinophilia, and accumulation of alternatively activated macrophages (AAMs) in the murine airways. More specifically, mice that inhaled viable conidia resulted in a mixed TH1 and TH2 (IL-13) cytokine response. Recruitment of eosinophils corresponded with increased Ccl11 transcripts. Furthermore, genes associated with M2 or alternatively activated macrophage polarization (eg, Arg1, Chil3, and Retnla) were significantly up-regulated in viable A fumigatus-exposed mice. In mice inhaling HIC, CD4+ T cells expressing IFN-γ (TH1) dominated the lymphocytic infiltration. Quantitative proteomics of the lung revealed metabolic reprogramming accompanied by mitochondrial dysfunction and endoplasmic reticulum stress stimulated by oxidative stress from repetitive microbial insult. CONCLUSION: Our studies demonstrate that A fumigatus conidial viability in vivo is critical to the immunopathological presentation of chronic fungal allergic disease. Published by Elsevier Inc.
BACKGROUND:Aspergillus fumigatus-induced allergic airway disease has been shown to involve conidial germination in vivo, but the immunological mechanisms remain uncharacterized. OBJECTIVE: A subchronic murine exposure model was used to examine the immunological mediators that are regulated in response to either culturable or nonculturable A fumigatus conidia. METHODS: Female B6C3F1/N mice were repeatedly dosed via inhalation with 1 × 105 viable or heat-inactivated conidia (HIC), twice per week for 13 weeks (26 exposures). Control mice inhaled high-efficiency particulate arrestor-filtered air. The influence of A fumigatus conidial germination on the pulmonary immunopathological outcomes was evaluated by flow cytometry analysis of cellular infiltration in the airways, assessment of lung messenger RNA expression, quantitative proteomics, and histopathology of whole lung tissue. RESULTS: Repeated inhalation of viable conidia, but not HIC, resulted in allergic inflammation marked by vascular remodeling, extensive eosinophilia, and accumulation of alternatively activated macrophages (AAMs) in the murine airways. More specifically, mice that inhaled viable conidia resulted in a mixed TH1 and TH2 (IL-13) cytokine response. Recruitment of eosinophils corresponded with increased Ccl11 transcripts. Furthermore, genes associated with M2 or alternatively activated macrophage polarization (eg, Arg1, Chil3, and Retnla) were significantly up-regulated in viable A fumigatus-exposed mice. In mice inhaling HIC, CD4+ T cells expressing IFN-γ (TH1) dominated the lymphocytic infiltration. Quantitative proteomics of the lung revealed metabolic reprogramming accompanied by mitochondrial dysfunction and endoplasmic reticulum stress stimulated by oxidative stress from repetitive microbial insult. CONCLUSION: Our studies demonstrate that A fumigatus conidial viability in vivo is critical to the immunopathological presentation of chronic fungal allergic disease. Published by Elsevier Inc.
Authors: Angela R Lemons; Tara L Croston; W Travis Goldsmith; Mark A Barnes; Mukhtar A Jaderson; Ju-Hyeong Park; Walter McKinney; Donald H Beezhold; Brett J Green Journal: Inhal Toxicol Date: 2019-12-24 Impact factor: 2.724
Authors: Tara L Croston; Angela R Lemons; Mark A Barnes; William T Goldsmith; Marlene S Orandle; Ajay P Nayak; Dori R Germolec; Brett J Green; Donald H Beezhold Journal: Am J Respir Cell Mol Biol Date: 2020-05 Impact factor: 6.914
Authors: Sarah R Haines; Rachel I Adams; Brandon E Boor; Thomas A Bruton; John Downey; Andrea R Ferro; Elliott Gall; Brett J Green; Bridget Hegarty; Elliott Horner; David E Jacobs; Paul Lemieux; Pawel K Misztal; Glenn Morrison; Matthew Perzanowski; Tiina Reponen; Rachael E Rush; Troy Virgo; Celine Alkhayri; Ashleigh Bope; Samuel Cochran; Jennie Cox; Allie Donohue; Andrew A May; Nicholas Nastasi; Marcia Nishioka; Nicole Renninger; Yilin Tian; Christina Uebel-Niemeier; David Wilkinson; Tianren Wu; Jordan Zambrana; Karen C Dannemiller Journal: Build Environ Date: 2019-12-18 Impact factor: 6.456
Authors: Thatcher B Ladd; James A Johnson; Christen L Mumaw; Hendrik J Greve; Xiaoling Xuei; Ed Simpson; Mark A Barnes; Brett J Green; Tara L Croston; Chandrama Ahmed; Angela Lemons; Donald H Beezhold; Michelle L Block Journal: ASN Neuro Date: 2021 Jan-Dec Impact factor: 4.146