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<p>Inflammation and oxidative stress are key drivers in the pathogenesis of chronic lung diseases, including asthma, pulmonary fibrosis, and chronic obstructive pulmonary disease. Extracellular vesicles derived from the marine microalga <i>Tetraselmis chuii</i>, referred to as nanoalgosomes, have recently gained attention as natural nanocarriers that possess inherent antioxidant and anti-inflammatory properties. In this study, we investigated the biocompatibility and protective effects of aerosolized nanoalgosomes in a bronchial epithelial–macrophage co-culture model at the air-liquid interface. Co-cultures of CALU-3 epithelial cells and differentiated THP-1 macrophages were primed with aerosolised nanoalgosomes and subsequently exposed to either oxidative stress (tert-butyl hydroperoxide) or an inflammatory stimulus (lipopolysaccharide; LPS). Epithelial barrier integrity and cytotoxicity were evaluated using transepithelial electrical resistance and lactate dehydrogenase release assays, respectively, while intracellular reactive oxygen species levels and cytokine secretion were measured to assess antioxidant and immunomodulatory responses. Nanoalgosomes were non-cytotoxic, preserved epithelial barrier integrity, and significantly reduced oxidative stress. In addition, nanoalgosomes priming attenuated LPS-induced secretion of pro-inflammatory cytokines (IL-1β, IL-6, IL-8, IL-18, TNF-α) as well as the anti-inflammatory cytokine IL-10, suggesting a balanced immunomodulatory response. Collectively, these findings demonstrate the potential of nanoalgosomes as a naturally derived inhalable therapeutic strategy for chronic inflammatory lung diseases.</p> Graphical abstract <p></p>

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Aerosolized microalgal derived extracellular vesicles reduce oxidative stress and inflammation in bronchial epithelial macrophage cocultures at the air liquid interface

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月1日

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  • Wesam Darwish,
  • Giorgia Adamo,
  • Mohammad Almasaleekh,
  • Sabrina Picciotto,
  • Paola Gargano,
  • Daniele Paolo Romancino,
  • Samuele Raccosta,
  • Ralf Zimmermann,
  • Mauro Manno,
  • Antonella Bongiovanni,
  • Sebastiano Di Bucchianico

摘要

Inflammation and oxidative stress are key drivers in the pathogenesis of chronic lung diseases, including asthma, pulmonary fibrosis, and chronic obstructive pulmonary disease. Extracellular vesicles derived from the marine microalga Tetraselmis chuii, referred to as nanoalgosomes, have recently gained attention as natural nanocarriers that possess inherent antioxidant and anti-inflammatory properties. In this study, we investigated the biocompatibility and protective effects of aerosolized nanoalgosomes in a bronchial epithelial–macrophage co-culture model at the air-liquid interface. Co-cultures of CALU-3 epithelial cells and differentiated THP-1 macrophages were primed with aerosolised nanoalgosomes and subsequently exposed to either oxidative stress (tert-butyl hydroperoxide) or an inflammatory stimulus (lipopolysaccharide; LPS). Epithelial barrier integrity and cytotoxicity were evaluated using transepithelial electrical resistance and lactate dehydrogenase release assays, respectively, while intracellular reactive oxygen species levels and cytokine secretion were measured to assess antioxidant and immunomodulatory responses. Nanoalgosomes were non-cytotoxic, preserved epithelial barrier integrity, and significantly reduced oxidative stress. In addition, nanoalgosomes priming attenuated LPS-induced secretion of pro-inflammatory cytokines (IL-1β, IL-6, IL-8, IL-18, TNF-α) as well as the anti-inflammatory cytokine IL-10, suggesting a balanced immunomodulatory response. Collectively, these findings demonstrate the potential of nanoalgosomes as a naturally derived inhalable therapeutic strategy for chronic inflammatory lung diseases.

Graphical abstract