Home Bratislava Medical Journal 2023 Bratislava Medical Journal Vol.124, No.9, p.690–698, 2023

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Published Monthly, in English
Founded: 1919
ISSN 0006-9248
(E)ISSN 1336-0345

Impact factor 1.564


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Bratislava Medical Journal Vol.124, No.9, p.690–698, 2023

Title: Inhalation of multi-wall carbon nanotubes changes the expression of apoptosis and cancer genes in rat brain and lungs
Author: Fatemeh SAMIEI, Maryam TORSHABI, Farshad H. SHIRAZI, Mansour Rezazadeh AZARI, Jalal POURAHMAD

Abstract: One of the important issues in urban areas is air pollution which causes respiratory disorders. A significant association between exposure to inhaled particulate matter (PM), mainly ultrafine particles, and increased neurological and pulmonary morbidity and mortality was observed in some research. This study aimed to demonstrate the relation between multi-wall carbon nanotubes (MWCNTs) inhalation and the carcinogenic effect of these materials in the brain and lungs. For this purpose, we investigated gene expression in rat brain and lung tissues induced by exposure to MWCNTs. Rats were exposed to MWCNTs in diameters of 10 and 100 nm (pure and impure) at a concentration of 5 mg/m3. Exposure was done through a whole-body exposure chamber for 5 h/day, 5 days/week for 14 days. After exposure, both brain and lung tissues were isolated to evaluate certain gene expressions including Bax, Bcl2, Rac1, Tp53, Mmp12, and Arc. The results showed that exposure to impure and pure MWCNTs (10 and 100 nm) at a concentration of 5 mg/m3 causes up-regulation or down-regulation of some of these genes. The results suggest that impure and pure MWCNTs (10 and 100 nm) can increase the risk of central nervous system disorders such as Alzheimer’s disease and increase the risk of carcinogenesis in the lung tissues of rats exposed to MWCNTs (Tab. 2, Fig. 2, Ref. 64). Text in PDF www.elis.sk

Keywords: multi-wall carbon nanotube, inhalation, gene expression, carcinogenicity, brain, lung
Published online: 04-Jul-2023
Year: 2023, Volume: 124, Issue: 9 Page From: 690, Page To: 698

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