• 1. Intensive Care Unit, Banan District People's Hospital, Chongqing, 401320, China;
  • 2. ;
  • 3. ;
  • 4. ;
PengLibo, Email: plbbnicu@yeah.net
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Objective To investigate the endoplasmic reticulum stress associated apoptosis gene Caspase-12 expression in paraquat-induced pulmonary fibrosis. Methods 30 adult healthy Sprague-Dawley(SD) rats were randomly divided into a nomal control group,two pulmonary fibrosis model groups (intragastrically administered paraquat for 14 days and 28 days,respectively).The model of pulmonary fibrosis was established through intragastrically administering paraquat at the dose of 30 mg/kg.RT-PCR was used to determine the mRNA expression of Caspase-12.Immunohistochemistry was used to determine the protein expression of Caspase-12.HE staining and Masson staining were used to determine the degree of alveolitis and pulmonary fibrosis. Results HE staining and Masson staining of lung tissues proved that pulmonary fibrosis model was successfully constructed.The degree of alveolitis and pulmonary fibrosis in the model group was significantly more serious than that in the control group(P<0.01).RT-PCR and Immunohistochemistry results showed that the expression of Caspase-12 were remarkably increased in the pulmonary fibrosis model group(14 d group)(P<0.01),even more elevated in 28 d group compared with the 14 d group. Conclusion The results demonstrate that the expression of Caspase-12 in paraquat poisoned rats is up-regulated,suggesting endoplasmic reticulum stress plays an important role in paraquat induced-pulmonary fibrosis.

Citation: ZhangZhijian, DongYaoyao, WuCan, ShouYunfeng, HeYouhu, PengLibo. Expression of Endoplasmic Reticulum Stress Associated Apoptosis Gene Caspase-12 in Lung of Paraquat-induced Pulmonary Fibrosis Rats. Chinese Journal of Respiratory and Critical Care Medicine, 2014, 13(3): 268-272. doi: 10.7507/1671-6205.2014064 Copy

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