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Expression of Growth Factors and Secretory Leukocyte Protease Inhibitor (SLPI) in RAW264.7 Cells after Lipopolysaccharide (LPS) Stimulation  

Son, Wook-Hee (Department of Conservative Dentistry, College of Dentistry, Chosun University)
Choi, Baik-Dong (Department of Oral Histology, College of Dentistry, Chosun University)
Jeong, Soon-Jeong (Department of Oral Histology, College of Dentistry, Chosun University)
Wang, Guan-Lin (Department of Oral Histology, College of Dentistry, Chosun University)
Hwang, Ho-Keel (Department of Conservative Dentistry, College of Dentistry, Chosun University)
Jeong, Moon-Jin (Department of Conservative Dentistry, College of Dentistry, Chosun University)
Publication Information
Applied Microscopy / v.37, no.2, 2007 , pp. 93-102 More about this Journal
Abstract
Secretory leukocyte protease inhibitor (SLPI) was known as one of bacterial lipopolysaccharide (LPS)-induced products of macrophage. Macrophages play an important role in the development of inflammatory responses by secreting an array of cytokines and chemokines in a tissue microenvironment. To identify the function and relationship between potent growth factors and SLPI after LPS stimulation, we conducted reverse transcriptase polymerase chain reaction (RT-PCR) and Western blots for the detection of mRNA and protein expression of SLPI and growth factors such as VEGF, PDGF, bFGF after 100 ng LPS stimulation on the RAW264.7 cells. The result of RT-PCR was showed SLPI mRNA expression was increased from 60 min to 48h in RAW 264.7 cells after incubation with LPS. VEGF and PDGF mRNA was expressed highly at initial stage by LPS stimulation. The mRNA of bFGF and type I collagen was very weakly expressed after LPS stimulation. SLPI protein level was increased likely the mRNA levels in RAW 267.7 cells. Additionally, phase contrast and scanning electron microscopic observation demonstrated that the LPS induce the change of morphology of the RAW264.7 cells. From these results, it suggest that expression of SLPI by LPS treatment may associate with VEGF and PDGF expression in RAW264.7 cells.
Keywords
Growth factors; Lipopolysaccharide; RAW264.7; Secretory leukocyte protease inhibitor(SLPI);
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