• Zhonghua Jie He He Hu Xi Za Zhi · Apr 2009

    [Changes of the sodium channel in alveolar type II cells in pulmonary water transport in rats with oleic acid-induced acute lung injury].

    • Lin He, Tao-Ping Li, Wang-Mei Zhou, Chun-Ling Chen, and Li-Hua Zhu.
    • Emergency Department, Nanfang Medical University Nanfang Hospital, Guangzhou 510515, China.
    • Zhonghua Jie He He Hu Xi Za Zhi. 2009 Apr 1; 32 (4): 278-81.

    ObjectiveTo determine the capability of alveolar fluid clearance and the changes of sodium channel in alveolar type II cells (ATII) in oleic acid-induced acute lung injury.MethodsForty four male Sprague-Dawley (SD) rats were randomized into a control group and an acute lung injury (ALI) group, with 22 rats in each group. The ALI model was established by oleic acid. The ATII cells were acutely isolated and purified, and the ATII cellular ultrastructure was observed by transmission electron microscope. In each group, the mRNA expression of 3 epithelial sodium channel (ENaC) subunits in acute isolated ATII cells from 8 rats were detected by reverse transcription-polymerase chain reaction (RT-PCR), while the extravascular lung water (EVLW) content was quantified in 7 rats by gravimetric measurement, and the lung histopathological changes were studies in 7 rats.ResultsIn the ALI group, Smith lung injury score (7.6 +/- 0.8) and EVLW (0.80 +/- 0.17) ml were significantly higher than those in the control group [Smith score: (1.1 +/- 0.2), t = -20.859, P < 0.01; EVLW: (0.52 +/- 0.10) ml, t = -3.851, P < 0.01]. The transmission electron microscopic observation showed that there were degeneration, apoptosis, and lamellar body vacuolar changes in the ATII cells from the ALI rats. RT-PCR demonstrated that the alpha-subunit of the ENaC mRNA expression was the highest among the 3 subunits (F = 4.40, P = 0.02). In the ALI group, mRNA expressions of all the 3 ENaC subunits in acutely isolated ATII cells were decreased as compared to those in the control group [alpha-subunit: (51 +/- 9)% vs (82 +/- 7)%, t = 7.61, P < 0.01; beta-subunit: (13 +/- 7)% vs (25 +/- 4)%, t = 4.53, P < 0.01; gamma-subunit: (31 +/- 15)% vs (40 +/- 17)%, t = 3.01, P < 0.05; respectively].ConclusionsThe capacity of alveolar fluid clearance was attenuated in oleic acid-induced acute lung injury. The ENaC subunit mRNA levels of ATII cells were significantly decreased in ALI rats.

      Pubmed     Full text   Copy Citation     Plaintext  

      Add institutional full text...

    Notes

     
    Knowledge, pearl, summary or comment to share?
    300 characters remaining
    help        
    You can also include formatting, links, images and footnotes in your notes
    • Simple formatting can be added to notes, such as *italics*, _underline_ or **bold**.
    • Superscript can be denoted by <sup>text</sup> and subscript <sub>text</sub>.
    • Numbered or bulleted lists can be created using either numbered lines 1. 2. 3., hyphens - or asterisks *.
    • Links can be included with: [my link to pubmed](http://pubmed.com)
    • Images can be included with: ![alt text](https://bestmedicaljournal.com/study_graph.jpg "Image Title Text")
    • For footnotes use [^1](This is a footnote.) inline.
    • Or use an inline reference [^1] to refer to a longer footnote elseweher in the document [^1]: This is a long footnote..

    hide…