Abstract：
:Exposure to silica can cause lung fibrosis and cancer. Identification of molecular targets is important for the intervention and/or prevention of silica-induced lung diseases. Telomeres consist of tandem repeats of DNA sequences at the end of chromosomes, preventing chromosomal fusion and degradation. Regulator of telomere length-1 (RTEL1) and telomerase reverse transcriptase (TERT), genes involved in telomere regulation and function, play important roles in maintaining telomere integrity and length. The goal of this study was to assess the effect of silica inhalation on telomere length and the regulation of RTEL1 and TERT. Lung tissues and blood samples were collected from rats at 4, 32, and 44 wk after exposure to 15 mg/m3 of silica × 6 h/d × 5 d. Controls were exposed to air. At all-time points, RTEL1 expression was significantly decreased in lung tissue of the silica-exposed animals compared to controls. Also, significant increases in telomere length and TERT were observed in the silica group at 4 and 32 wk. Telomere length, RTEL1 and TERT expression may serve as potential biomarkers related to silica exposure and may offer insight into the molecular mechanism of silica-induced lung disease and tumorigeneses.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Shoeb M,Joseph P,Kodali V,Mustafa G,Farris BY,Umbright C,Roberts JR,Erdely A,Antonini JMdoi
10.1038/s41598-017-17645-ysubject
Has Abstractpub_date
2017-12-11 00:00:00pages
17284issue
1issn
2045-2322pii
10.1038/s41598-017-17645-yjournal_volume
7pub_type
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