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Influence of macrophages and neutrophilic granulocyte-like cells on crystalline silica-induced toxicity in human lung epithelial cells.
Toxicol Res (Camb)
February 2025
Département Toxicologie et Biométrologie, Institut National de Recherche et de Sécurité pour la prévention des accidents du travail et des maladies professionnelles (INRS), 1 rue du Morvan, 54519 Vandœuvre-lès-Nancy, France.
In many industrial activities, workers may be exposed by inhalation to particles that are aerosolized, To predict the human health hazard of these materials, we propose to develop a co-culture model (macrophages, granulocytes, and alveolar epithelial cells) designed to be more representative of the inflammatory pulmonary response occurring in vivo. Phorbol 12-myristate 13-acetate (PMA)-differentiated THP-1 cells were used as macrophages, All-trans retinoic acid (ATRA)-differentiated HL60 were used as granulocytes and A549 were used as epithelial alveolar type II cells. A crystalline silica sample DQ12 was used as a prototypical particle for its capabilities to induce DNA damage, inflammatory response, and oxidative stress in epithelial cells; its polyvinylpyridine-N-oxide (PVNO)-surface modified counterpart was also used as a negative particulate control.
View Article and Find Full Text PDFMutated IL-32θ (A94V) inhibits COX2, GM-CSF and CYP1A1 through AhR/ARNT and MAPKs/NF-κB/AP-1 in keratinocytes exposed to PM.
Sci Rep
January 2025
Department of Bioscience and Biotechnology, Konkuk University, Seoul, 05029, Republic of Korea.
Exposure to particulate matter (PM) in the air harms human health. Most studies on particulate matter's (PM) effects have primarily focused on respiratory and cardiovascular diseases. Recently, IL-32θ, one of the IL-32 isoforms, has been demonstrated to modulate cancer development and inflammatory responses.
View Article and Find Full Text PDFCD131 antagonism blocks inflammation, emphysema and fibrosis in an asthma-COPD overlap mouse model originating in early life.
Respirology
January 2025
School of Health and Biomedical Sciences, RMIT University, Melbourne, Victoria, Australia.
Background And Objective: Asthma-COPD overlap (ACO) is characterized by patients exhibiting features of both asthma and COPD. Currently, there is no specific treatment for ACO. This study aimed to investigate the therapeutic potential of targeting CD131, a shared receptor subunit for IL-3, IL-5 and GM-CSF, in ACO development and in preventing acute viral exacerbations.
View Article and Find Full Text PDFThe role of mTOR activation in steroid-resistant asthma: insights from particulate matter-induced mouse model and patient studies.
Inflamm Res
January 2025
Institute of Allergy and Clinical Immunology, Biomedical Research Institute, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, Republic of Korea.
Particulate matter (PM) exposure has been proposed as one of the causes of steroid resistance. However, studies investigating this using patient samples or animals are still lacking. Therefore, in this study, we aimed to investigate the changes in cytokines and mTOR (mammalian target of rapamycin) activation in patients with steroid resistant asthma and the role of mTOR in a mouse model of steroid resistant asthma induced by PM.
View Article and Find Full Text PDFPhysiological responses of pacu (Piaractus mesopotamicus) to intermittent cold exposure: A comprehensive analysis of stress, immunity, antioxidant, and metabolic adaptations.
Fish Physiol Biochem
January 2025
São Paulo State University (UNESP), Aquaculture Center of UNESP, Jaboticabal, Sao Paulo, Brazil.
This study examined the energy-dependent physiological responses, including stress, innate immune, and antioxidant systems, as well as indicators of energy mobilization, in pacu (Piaractus mesopotamicus) exposed to intermittent cold, aiming to assess the correlations between these responses. The fish were acclimated to 28 °C, divided into two groups, a control group maintained at 28 °C, and another exposed to 16 °C for two 24 h periods with a 5-day interval between them. The fish were sampled at six time points: baseline (after acclimatization to 28 °C), 24 h after the 1st exposure to 16 °C, after 5 days of recovery at 28 °C, 24 h after the 2nd exposure to 16 °C, and after 24 and 48 h of recovery at 28 °C.
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