The neuropeptides α-MSH and NPY modulate phagocytosis and phagolysosome activation in RAW 264.7 cells.

The neuropeptides α-MSH and NPY modulate phagocytosis and phagolysosome activation in RAW 264.7 cells.
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DOI:
10.1016/j.jneuroim.2013.04.019
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发表时间:
2013-07-15
影响因子:
3.3
通讯作者:
Taylor, Andrew W.
Taylor, Andrew W.
中科院分区:
医学4区
文献类型:
--
作者:
Phan, Toan A.;Taylor, Andrew W.

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在免疫抑制性眼部微环境中,组成性存在免疫调节神经肽α-黑素细胞刺激激素(α-MSH)和神经肽Y(NPY),可促进巨噬细胞中的抑制功能。在本研究中,我们探讨了α-MSH和NPY调节巨噬细胞吞噬活性的可能性。经α-MSH和NPY处理的巨噬细胞吞噬未调理E. coli和革兰氏阳性菌S.金黄色葡萄球菌生物颗粒,但不是抗体调理的生物颗粒。神经肽显著抑制吞噬溶酶体活化和FcR相关的活性氧化物质的产生。这种抑制对应于神经肽调节眼微环境中的巨噬细胞功能以抑制免疫原性炎症的激活。
Within the immunosuppressive ocular microenvironment, there are constitutively present the immunomodulating neuropeptides alpha-melanocyte stimulating hormone (α-MSH) and Neuropeptide Y (NPY) that promote suppressor functionality in macrophages. In this study, we examined the possibility that α-MSH and NPY modulate phagocytic activity in macrophages. The macrophages treated with α-MSH and NPY were significantly suppressed in their capacity to phagocytize unopsonized E. coli and S. aureus bioparticles, but not antibody-opsonized bioparticles. The neuropeptides significantly suppressed phagolysosome activation, and FcR-associated generation of reactive oxidative species. This suppression corresponds to neuropeptide modulation of macrophage functionality within the ocular microenvironment to suppress the activation of immunogenic inflammation.
DOI: 10.1016/j.peptides.2006.07.029
发表时间: 2007-02-01
期刊: PEPTIDES
影响因子: 3
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