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KMID : 0893420090100020105
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Journal of Veterinary Science
2009 Volume.10 No. 2 p.105 ~ p.113
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Low dietary inorganic phosphate affects the lung growth of developing mice
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Xu Cheng-Xiong
Jin Hua
Chung Youn-Sun
Shin Ji-Young
Hwang Soon-Kyoung
Kwon Jung-Taek
Park Sung-Jin
Lee Eun-Sun
Arash Minai-Tehrani
Chang Seung-Hee
Woo Min-Ah
Noh Mi-Suk
An Gil-Hwan
Lee Kee-Ho
Cho Myung-Haing
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Abstract
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Inorganic phosphate (Pi) plays a critical role in diverse cellular functions, and regulating the Pi balance is accomplished by sodium-dependent Pi co-transporter (NPT). Pulmonary NPT has recently been identified in mammalian lungs. However, to date, many of the studies that have involved Pi have mainly focused on its effect on bone and kidney. Therefore, current study was performed to discover the potential effects of low Pi on the lung of developing transgenic mice expressing the renilla/firefly luciferase dual reporter gene. Two-weeks old male mice divided into 2 groups and these groups were fed either a low PI diet or a normal control diet (normal: 0.5% Pi, low: 0.1% Pi) for 4 weeks. After 4 weeks of the diet, all the mice were sacrificed. Their lungs were harvested and analyzed by performing luciferase assay, Western blotting, kinase assay and immunohistochemistry. Our results demonstrate that low Pi affects the lungs of developing mice by disturbing protein translation, the cell cycle and the expression of fibroblast growth factor-2. These results suggest that optimally regulating Pi consumption may be important to maintain health.
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KEYWORD
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Akt, fibroblast growth factor, inorganic phosphate, lung
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