共 25 条
Role of mannose receptor in oligochitosan-mediated stimulation of macrophage function
被引:89
作者:
Han, YP
Zhao, LH
[1
]
Yu, ZJ
Feng, J
Yu, QQ
机构:
[1] Zhejiang Univ, Coll Med, Dept Biochem & Mol Biol, Hangzhou 310027, Peoples R China
[2] Zhejiang Tradit Chinese Med Hosp, Inst Hematol, Hangzhou, Peoples R China
[3] Zhejiang Univ, Coll Med, Affiliated Hosp 2, Inst Orthopaed, Hangzhou 310027, Peoples R China
基金:
中国国家自然科学基金;
关键词:
oligochitosan;
macrophage;
mannose receptor;
tumor necrosis factor-alpha;
D O I:
10.1016/j.intimp.2005.04.015
中图分类号:
R392 [医学免疫学];
Q939.91 [免疫学];
学科分类号:
100102 ;
摘要:
In this paper, we aimed to study the role of mannose receptor (MR) in oligochitosan induced RAW264.7 (a murine macrophage cell line) activation. Oligochitosan, which has 3-10 saccharide (N-acetyl-glucosamine or glucosamine) residues, was prepared by enzymatic hydrolysis of chitosan using cellulase. Fluorophore 2-aminoacridone was conjugated to oligochitosan to observe cellular events of oligochitosan-RAW264.7 interaction under Confocal Laser Microscopy. RT-PCR was performed to assess the level of tumor necrosis factor-alpha (TNF-alpha) secretion. Free cytosolic Ca2+ was measured using the fluorescent Ca2+ indicator Fluo3/AM. We found that MR was the major receptor responsible for oligochitosan uptake. MR was also engaged in oligochitosan induced TNF-alpha enhancement and [Ca2+](in) flux and may serve as a signaling receptor in oligochitosan-induced activation of macrophage function. (c) 2005 Elsevier B.V. All rights reserved.
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页码:1533 / 1542
页数:10
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