Expression of antigen processing and presenting molecules by Schwann cells in inflammatory neuropathies.

Expression of antigen processing and presenting molecules by Schwann cells in inflammatory neuropathies.
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DOI:
10.1002/glia.20903
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发表时间:
2010-01-01
期刊:
影响因子:
6.2
通讯作者:
Kieseier, Bernd C.
Kieseier, Bernd C.
中科院分区:
医学1区
文献类型:
--
作者:
Horste, Gerd Meyer Zu;Heidenreich, Holger;Lehmann, Helmar C.;Ferrone, Soldano;Hartung, Hans-Peter;Wiendl, Heinz;Kieseier, Bernd C.

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雪旺细胞是周围神经系统(PNS)的髓鞘胶质细胞,在格林-巴利综合征(GBS)等炎症性神经疾病中可成为自身免疫反应的靶细胞。专业抗原提呈细胞(APC)通过提呈自身抗原来促进靶组织的自身免疫反应。其他类型的细胞可以通过充当非专业的APC来参与局部自身免疫反应。采用免疫细胞化学、免疫组织化学和流式细胞仪分析相结合的方法,我们证明了人雪旺细胞在体外和体内都表达了抗原处理和提呈机制(APM)。此外,培养的人雪旺细胞在炎性环境中增加蛋白酶体亚单位增量(Y)、抗原肽转运体TAP2以及人类白细胞抗原I类和人类白细胞抗原II类复合体的表达。与此相关的是,在GBS患者的腓肠神经活检中,雪旺细胞显示抗原处理和递呈分子的表达增加。此外,培养的人雪旺细胞可以蛋白降解荧光标记的非哺乳动物抗原卵清蛋白。综上所述,我们的数据表明,抗原的处理和提呈可能是雪旺细胞的一种可能功能,可能有助于周围神经内的(自身)免疫反应。
Schwann cells are the myelinating glia cells of the peripheral nervous system (PNS) and can become targets of an autoimmune response in inflammatory neuropathies like the Guillain-Barré syndrome (GBS). Professional antigen presenting cells (APCs) are known to promote autoimmune responses in target tissues by presenting self-antigens. Other cell types could participate in local autoimmune responses by acting as nonprofessional APCs. Using a combined approach of immunocytochemistry, immunohistochemistry, and flow cytometry analysis we demonstrate that human Schwann cells express the antigen processing and presenting machinery (APM) in vitro and in vivo. Moreover, cultured human Schwann cells increase the expression of proteasome subunit delta (Y), antigen peptide transporter TAP2, and HLA Class I and HLA Class II complexes in an inflammatory environment. In correlation with this observation, Schwann cells in sural nerve biopsies from GBS patients show increased expression of antigen processing and presenting molecules. Furthermore, cultured human Schwann cells can proteolytically digest fluorescently-labeled nonmammalian antigen ovalbumin. Taken together, our data suggest antigen processing and presentation as a possible function of Schwann cells that may contribute to (auto)immune responses within peripheral nerves.
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