Dataset Information

The Acute and Short-Term Inhalation of Carbon Nanofiber in Sprague-Dawley Rats.

ABSTRACT: The inhalation toxicity of carbon nanofibers (CNFs) is not clearly known due to relatively few related studies reported. An acute inhalation study and short-term inhalation study (5 days) were therefore conducted using Sprague-Dawley rats. In the acute inhalation study, the rats were grouped and exposed to a fresh air control or to low (0.238 ± 0.197), moderate (1.935 ± 0.159), or high (24.696 ± 6.336 mg/m³) CNF concentrations for 6 h and thereafter sacrificed at 14 days. For the short-term inhalation study, the rats were grouped and exposed to a fresh air control or low (0.593 ± 0.019), moderate (2.487 ± 0.213), or high (10.345 ± 0.541 mg/m³) CNF concentrations for 6 h/day for 5 days and sacrificed at 1, 3, and 21 days post-exposure. No mortality was observed in the acute inhalation study. Thus, the CNF LC₅₀ was higher than 25 mg/m³. No significant body or organ weight changes were noted during the 5 days short-term inhalation study or during the post-exposure period. No significant effects of toxicological importance were observed in the hematological, blood biochemical, and coagulation tests. In addition, the bronchoalveolar lavage (BAL) fluid cell differential counts and BAL inflammatory markers showed no CNF-exposure-relevant changes. The histopathological examination also found no CNF-exposure-relevant histopathological lesions. Thus, neither acute nor 5 days inhalation exposure to CNFs induced any noticeable toxicological responses.

SUBMITTER: Jo MS

PROVIDER: S-EPMC9599497 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature

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The Acute and Short-Term Inhalation of Carbon Nanofiber in Sprague-Dawley Rats.

Jo Mi Seong MS Kim Boo Wook BW Kim Young Hun YH Kim Jin Kwon JK Kim Hoi Pin HP Shin Jae Hoon JH Lee Gun Ho GH Ahn Kangho K Gulumian Mary M Yu Il Je IJ

Biomolecules 20220922 10

The inhalation toxicity of carbon nanofibers (CNFs) is not clearly known due to relatively few related studies reported. An acute inhalation study and short-term inhalation study (5 days) were therefore conducted using Sprague-Dawley rats. In the acute inhalation study, the rats were grouped and exposed to a fresh air control or to low (0.238 ± 0.197), moderate (1.935 ± 0.159), or high (24.696 ± 6.336 mg/m<sup>3</sup>) CNF concentrations for 6 h and thereafter sacrificed at 14 days. For the shor ...[more]

PMID: 36291560

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Dataset Information

The Acute and Short-Term Inhalation of Carbon Nanofiber in Sprague-Dawley Rats.

Publications

The Acute and Short-Term Inhalation of Carbon Nanofiber in Sprague-Dawley Rats.

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