Abstract:
:The critical molecular mechanism in the development of the pulmonary fibrosis remains unknown, leaving diagnosed patients with a poor prognosis. To isolate the genes specifically up-regulated in pulmonary fibrosis, we established a rat silicosis model 360 d after treatment with crystalline silica suspension. Radiographs of chests showed that some scattered high-density shadows appeared in the lung field. Typical microscopic fibrosing silicotic nodules formed in the lung, alveolar epithelial cells and bronchial epithelial cells, particularly around the partial fibrosing silicotic nodules; some of them showed atypical hyperplasia that suggested a correlation between silicosis and lung cancer. Suppression subtractive hybridization analysis was performed to compare gene expression in lung tissue with silicosis and normal lung tissue. Reverse transcription-polymerase chain reaction showed that the expressions of seven novel cDNA sequences identified by suppression subtractive hybridization in lung tissue with silicosis differed from normal lung tissue. Bioinformatics analysis showed that 47 positive clones represented 35 genes containing two putative proteins and four predicted similar proteins. The analysis also showed that some screened genes in silicosis, such as prolyl 4-hydroxylases, actin-related protein-2/3 complex and acidic mammalian chitinase, have not been previously reported. These genes may provide new clues for investigating the molecular mechanisms in the development of pulmonary fibrosis.
journal_name
Acta Biochim Biophys Sin (Shanghai)journal_title
Acta biochimica et biophysica Sinicaauthors
Jin Z,Liu B,Feng D,Chen C,Li X,Hu Y,Peng J,Liu Y,Du J,Fu C,Wen Jsubject
Has Abstractpub_date
2008-08-01 00:00:00pages
740-6issue
8eissn
1672-9145issn
1745-7270journal_volume
40pub_type
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