Modulation of immunogenicity and antigenicity of proteins by maleylation to target scavenger receptors on macrophages.

Modulation of immunogenicity and antigenicity of proteins by maleylation to target scavenger receptors on macrophages.
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通过马来酰化作用靶向巨噬细胞上的清道夫受体来调节蛋白质的免疫原性和抗原性。

DOI:
10.4049/jimmunol.154.1.1
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发表时间:
1995
影响因子:
4.4
通讯作者:
S. Rath
S. Rath
中科院分区:
医学2区
文献类型:
--
作者:
R. Abraham;Nagendra Singh;A. Mukhopadhyay;S. Basu;V. Bal;S. Rath

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我们用顺丁烯二酸化的蛋白质来靶向巨噬细胞特异性的清道夫受体,并使用这个系统来研究这些蛋白质的表位和免疫原性的变化。我们发现白喉类毒素(DT)的顺丁烯二酸化可诱导靶向巨噬细胞清道夫受体,并增强其免疫原性。DT作为可溶性蛋白注射后不能引起可检测到的血清抗体反应。然而,顺丁烯二酸二乙酯(MDT)确实能产生显著的抗体反应。此外,在体外,可溶性MDT免疫比DT免疫产生更好的T细胞增殖反应,从而证明马来化导致体内T细胞免疫原性增强。我们还发现,马来化作用破坏了DT的天然B细胞表位,并产生了新的表位,因为DT和MDT的抗血清不会发生交叉反应。至少产生的一些新表位是马来化特异性的,因为针对各种马来化蛋白的抗血清确实会发生交叉反应。相反,顺丁烯二酸化不会显著改变DT产生的T细胞表位,因为DT或MDT免疫产生的T细胞是交叉反应的,并且DT和MDT都能刺激针对单个合成DT肽的T细胞。顺丁烯二酸化的蛋白质在体外比它们的天然对应蛋白更好地呈现,这种呈现的增强被无关的顺丁烯二酸化的蛋白质所阻断。这些结果表明,通过马来酸化作用靶向巨噬细胞上清道夫受体的AGS能更好地呈现给T细胞,并且在体内不需要佐剂就能产生免疫原性。
We have maleylated proteins to target macrophage-specific scavenger receptors and have used this system to study changes in the epitopes and immunogenicity of such proteins. We show that maleylation of diphtheria toxoid (DT) induces targeting to macrophage scavenger receptors and enhances its immunogenicity. DT does not evoke detectable serum Ab responses upon injection as soluble protein. However, maleylated DT (mDT) does generate a significant Ab response. Furthermore, immunization with soluble mDT leads to a better T cell proliferative response in vitro than immunization with DT can generate, thereby demonstrating that maleylation leads to enhanced T cell immunogenicity in vivo. We also find that maleylation disrupts the native B cell epitopes of DT and creates new epitopes, because antisera to DT and mDT do not cross-react. At least some of the new epitopes generated are maleylation specific, because antisera against various maleylated proteins do cross-react. In contrast, maleylation does not significantly modify the repertoire of T cell epitopes generated from DT, because T cells generated by either DT or mDT immunization are cross-reactive, and both DT and mDT can stimulate T cells that are specific for single synthetic DT peptide. Maleylated proteins are better presented in vitro than are their native counterparts, and this enhancement of presentation is blocked by unrelated maleylated proteins. These results suggest that Ags targeted to scavenger receptors on macrophages by maleylation are better presented to T cells and are immunogenic in vivo without adjuvant.
鉴定 I 区限制性抗原呈递至 T 淋巴细胞所需的巨噬细胞抗原加工事件。
DOI: --
发表时间: 1981
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
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通讯作者: Unanue,ER
影响因子: 11.1
作者:
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通讯作者: Gilberto R. Sambrano;D. Steinberg
DOI: --
发表时间: 1993
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
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通讯作者: Cook,RG
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DOI: 10.1016/0923-2494(96)89642-8
发表时间: 1996
期刊: Research in immunology
影响因子: --
作者:
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通讯作者: Tabaczewski,P