Multiple tissue-specific isoforms of sulfatide activate CD1d-restricted type II NKT cells.

Multiple tissue-specific isoforms of sulfatide activate CD1d-restricted type II NKT cells.
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DOI:
10.1002/eji.200839001
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发表时间:
2009-07
影响因子:
5.4
通讯作者:
Cardell, Susanna L.
Cardell, Susanna L.
中科院分区:
医学3区
文献类型:
--
作者:
Blomqvist, Maria;Rhost, Sara;Teneberg, Susann;Lofbom, Linda;Osterbye, Thomas;Brigl, Manfred;Mansson, Jan-Eric;Cardell, Susanna L.

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鞘糖脂硫苷脂(SO 3 -3Galβ1Cer)是CD 1d限制性NKT细胞亚群的一种已证实的配体,其可以调节实验性自身免疫性脑脊髓炎(多发性硬化症的小鼠模型)以及肿瘤免疫和实验性肝炎。天然硫苷脂是硫苷脂同种型的混合物,即具有不同长链碱基和脂肪酸链长度和饱和度的硫苷脂分子。在这里,我们证明了硫苷脂特异性CD 1d限制性鼠NKT杂交瘤识别几种不同的硫苷脂亚型。这些包括生理学相关亚型C24:1和C24:0(神经系统髓鞘片层的主要成分)和C16:0(胰岛β细胞中突出)。最有效的硫苷脂亚型是溶血硫苷脂(缺乏脂肪酸)。缩短脂肪酸链长度(C24:1与C18:1),或饱和的长脂肪酸(C24:0),导致刺激能力降低,脂肪酸羟基化消除的反应。此外,硫苷脂是不负责的自然自身反应性对脾细胞的XV 19 T杂交瘤细胞。我们的研究结果揭示了CD 1d限制性NKT细胞克隆识别硫苷脂亚型的混杂性,并表明硫苷脂是髓鞘和胰腺β细胞的主要成分,是II型CD 1d限制性NKT细胞的几种天然配体之一。
The glycosphingolipid sulfatide (SO3-3Galβ1Cer) is a demonstrated ligand for a subset of CD1d-restricted NKT cells, which could regulate experimental autoimmune encephalomyelitis, a murine model for multiple sclerosis, as well as tumor immunity and experimental hepatitis. Native sulfatide is a mixture of sulfatide isoforms, i.e. sulfatide molecules with different long-chain bases and fatty acid chain lengths and saturation. Here, we demonstrate that sulfatide-specific CD1d-restricted murine NKT hybridomas recognized several different sulfatide isoforms. These included the physiologically relevant isoforms C24:1 and C24:0, major constituents of the myelin sheet of the nervous system, and C16:0, prominent in the pancreatic islet β-cells. The most potent sulfatide isoform was lysosulfatide (lacking a fatty acid). Shortened fatty acid chain length (C24:1 versus C18:1), or saturation of the long fatty acid (C24:0), resulted in reduced stimulatory capacity, and fatty acid hydroxylation abolished the response. Moreover, sulfatide was not responsible for the natural autoreactivity toward splenocytes by XV19 T hybridoma cells. Our results reveal a promiscuity in the recognition of sulfatide isoforms by a CD1d-restricted NKT-cell clone, and suggest that sulfatide, a major component of the myelin sheet and pancreatic β-cells, is one of several natural ligands for type II CD1d-restricted NKT cells.
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发表时间: 1988-01-01
影响因子: 5.4
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DOI: 10.1084/jem.20031389
发表时间: 2004-04-05
影响因子: 15.3
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