PMID- 37967788 OWN - NLM STAT- MEDLINE DCOM- 20231216 LR - 20231216 IS - 1873-6351 (Electronic) IS - 0278-6915 (Linking) VI - 182 DP - 2023 Dec TI - Combined exposure to multiwalled carbon nanotubes and dibutyl phthalates aggravated airway inflammation in rats. PG - 114188 LID - S0278-6915(23)00590-2 [pii] LID - 10.1016/j.fct.2023.114188 [doi] AB - Previous work has shown that mice exposed to dibutyl phthalate (DBP) adsorbed onto multi-walled carbon nanotubes (MWCNTs), via tail vein injection, displayed black lesions in their lungs. To investigate the mechanism causing this toxicity in the lung tissue, we performed an experiment with rats, exposing them to DBP adsorbed onto MWCNTs via a tail vein injection for 14 days. The results revealed pulmonary edema and greyish-black lung tissue in the MWCNTs and the MWCNTs + DBP combined exposure groups. In the combined exposure group there was evident alveolar fragmentation and adhesion, and lung tissue sections showed significant levels of black particles. Sections of the non-cartilaginous region of the trachea had significant folding of the pseudostratified ciliated columnar epithelium and marked thickening of the submucosa. In broncho alveolar lavage fluid, the number of leukocytes (WBC), lymphocytes (Lym), neutrophils (Neu), and eosinophils (Eos), as well as levels of immunoglobulin E (IgE), interleukin 6 (IL-6), tumor necrosis factor alpha (TNF-alpha), and interleukin 1beta (IL-1beta) were all significantly higher. TNF-alpha, IL-6, signal transducer and activator of transcription 3 (STAT3), and alpha-smooth muscle actin (alpha-SMA) mRNA expression were all elevated in the lung tissue. The combined exposure group, which had considerable airway remodeling, had a greater degree of tracheal constriction and luminal narrowing, according to the results of the alpha-SMA immunofluorescence assay. According to these experimental findings, the exposure to both MWCNTs and DBP seemed to have a synergistic effect and exacerbated rats' impaired respiratory function that resulted from exposure to MWCNTs alone. CI - Copyright (c) 2023 Elsevier Ltd. All rights reserved. FAU - He, Suli AU - He S AD - Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, Hubei, China. FAU - Peng, Haiyan AU - Peng H AD - Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, Hubei, China. FAU - Wu, Min AU - Wu M AD - Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, Hubei, China. FAU - Yan, Chao AU - Yan C AD - Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, Hubei, China. FAU - Wan, Jian AU - Wan J AD - Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, Hubei, China. FAU - Ye, Xin AU - Ye X AD - Liquor Marking Biological Technology and Application of Key Laboratory of Sichuan Province, College of Bioengineering, Sichuan University of Science & Engineering, Yibin, 644000, China. FAU - Zhang, Hongmao AU - Zhang H AD - Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, Hubei, China. FAU - Ding, Shumao AU - Ding S AD - Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, Hubei, China. Electronic address: dingsm@ccnu.edu.cn. LA - eng PT - Journal Article DEP - 20231113 PL - England TA - Food Chem Toxicol JT - Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association JID - 8207483 RN - 0 (Nanotubes, Carbon) RN - 2286E5R2KE (Dibutyl Phthalate) RN - 0 (Cytokines) RN - 0 (Tumor Necrosis Factor-alpha) RN - 0 (Interleukin-6) SB - IM MH - Rats MH - Mice MH - Animals MH - *Nanotubes, Carbon/toxicity MH - Dibutyl Phthalate/toxicity/metabolism MH - Cytokines/metabolism MH - Tumor Necrosis Factor-alpha/metabolism MH - Interleukin-6/metabolism MH - Lung MH - Inflammation/metabolism OTO - NOTNLM OT - Airway inflammation OT - Asthma OT - Combined exposure OT - Dibutyl phthalate OT - Multi-walled carbon nanotubes COIS- Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2023/11/16 00:42 MHDA- 2023/12/17 09:45 CRDT- 2023/11/15 19:24 PHST- 2023/09/01 00:00 [received] PHST- 2023/10/25 00:00 [revised] PHST- 2023/11/08 00:00 [accepted] PHST- 2023/12/17 09:45 [medline] PHST- 2023/11/16 00:42 [pubmed] PHST- 2023/11/15 19:24 [entrez] AID - S0278-6915(23)00590-2 [pii] AID - 10.1016/j.fct.2023.114188 [doi] PST - ppublish SO - Food Chem Toxicol. 2023 Dec;182:114188. doi: 10.1016/j.fct.2023.114188. Epub 2023 Nov 13.