Aerosolized Harmful Algal Bloom Toxin Microcystin-LR Induces Type 1/Type 17 Inflammation of Murine Airways
more »
- Univ. of Toledo, OH (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Univ. of Toledo, OH (United States)
- Indiana University School of Medicine, Indianapolis IN (United States)
- Wayne State Univ., Detroit, MI (United States)
- University of Alkafeel (Iraq)
Harmful algal blooms are increasing globally and pose serious health concerns releasing cyanotoxins. Microcystin-LR (MC-LR), one of the most frequently produced cyanotoxins, has recently been detected in aerosols generated by the normal motions of affected bodies of water. MC-LR aerosol exposure has been linked to a pro-inflammatory influence on the airways of mice; however, little is understood about the underlying mechanism or the potential consequences. This study aimed to investigate the pro-inflammatory effects of aerosolized MC-LR on murine airways. C57BL/6 and BALB/c mice were exposed to MC-LR aerosols, as these strains are predisposed to type 1/type 17 and type 2 immune responses, respectively. Exposure to MC-LR induced granulocytic inflammation in C57BL/6 but not BALB/c mice, as observed by increased expression of cytokines MIP-1α, CXCL1, CCL2, and GM-CSF compared with their respective vehicle controls. Furthermore, the upregulation of interleukins IL-17A and IL-12 is consistent with Th1- and Th17-driven type 1/type 17 inflammation. Histological analysis confirmed inflammation in the C57BL/6 lungs, with elevated neutrophils and macrophages in the bronchoalveolar lavage fluid and increased pro-inflammatory and pro-resolving oxidized lipids. In contrast, BALB/c mice showed no significant airway inflammation. These results highlight the ability of aerosolized MC-LR to trigger harmful airway inflammation, requiring further research, particularly into populations with predispositions to type 1/type 17 inflammation.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 2566426
- Report Number(s):
- LA-UR--24-23241
- Journal Information:
- Toxins, Journal Name: Toxins Journal Issue: 11 Vol. 16; ISSN 2072-6651
- Publisher:
- MDPICopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Neutralization of interleukin-17A delays progression of silica-induced lung inflammation and fibrosis in C57BL/6 mice
Microcystin-LR aerosol induces inflammatory responses in healthy human primary airway epithelium
Sulforaphane prevents microcystin-LR-induced oxidative damage and apoptosis in BALB/c mice
Journal Article
·
Fri Feb 14 23:00:00 EST 2014
· Toxicology and Applied Pharmacology
·
OSTI ID:22423787
Microcystin-LR aerosol induces inflammatory responses in healthy human primary airway epithelium
Journal Article
·
Fri Sep 16 20:00:00 EDT 2022
· Environment International
·
OSTI ID:1893823
Sulforaphane prevents microcystin-LR-induced oxidative damage and apoptosis in BALB/c mice
Journal Article
·
Mon Aug 15 00:00:00 EDT 2011
· Toxicology and Applied Pharmacology
·
OSTI ID:21587810