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首页> 外文期刊>Vaccine >Escheriosome mediated cytosolic delivery of Candida albicans cytosolic proteins induces enhanced cytotoxic T lymphocyte response and protective immunity.
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Escheriosome mediated cytosolic delivery of Candida albicans cytosolic proteins induces enhanced cytotoxic T lymphocyte response and protective immunity.

机译:念珠菌介导的白色念珠菌胞质蛋白的胞质传递诱导增强的细胞毒性T淋巴细胞反应和保护性免疫。

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摘要

Protection against intracellular fungal infections, in a manner similar to viral challenges necessitates activation of both humoral and cell mediated immune responses in unison. Most of the presently available antigen delivery vehicles including egg phosphatidyl-choline (egg-PC) liposomes, can evoke mainly humoral immune responses in the immunized animals. Keeping this fact into consideration, we earlier developed Escherichia coli membrane lipid vesicles (escheriosomes) and demonstrated that escheriosomes successfully fuse with the plasma membrane of macrophages ensuing in effective cytoplasmic delivery of entrapped antigen, a pre-requisite for inducing CD8+ T cell response against antigens. In the present study, we report the ability of escheriosomes encapsulated Candida albicans (C. albicans) cytosolic antigens (cAg), to generate protective immunity against systemic C. albicans infection in BALB/c mice. The immunization schedule using escheriosome encapsulated cAg induced strong antigen-specific CD8+ T-cell responses, which were markedly higher than that observed in mice immunized with IFA-antigen emulsion, or antigen encapsulated in egg PC liposomes. Interestingly, immunization with cAg delivered in escheriosomes was also successful in complete elimination of C. albicans infection in Balb/c mice. The study suggests that escheriosomes may function as a novel immunoadjuvants and emerge as an effective tool for generating protective immunity against C. albicans infection.
机译:以类似于病毒攻击的方式防止细胞内真菌感染,必须同时激活体液和细胞介导的免疫应答。目前大多数可用的抗原递送载体,包括卵磷脂酰胆碱(egg-PC)脂质体,可以在被免疫的动物中引起主要的体液免疫反应。考虑到这一事实,我们较早地开发了大肠埃希氏菌膜脂质囊泡(escheriosomes),并证明了大肠埃希菌体成功地与巨噬细胞质膜融合,从而确保了被包埋抗原的有效胞质传递,这是包埋抗原的先决条件。诱导CD8 + T细胞对抗原的反应。在本研究中,我们报告了包囊化白色念珠菌( C。albicans )胞质抗原(cAg)的大肠杆菌体产生针对全身性 C的保护性免疫的能力。 BALB / c小鼠感染白色念珠菌。大肠杆菌包囊的cAg的免疫方案诱导了强烈的抗原特异性CD8 + T细胞应答,明显高于用IFA抗原乳剂免疫或抗原包埋在卵PC脂质体中的小鼠。有趣的是,用在脂质体中递送的cAg进行的免疫也成功地完全消除了iC。 Balb / c小鼠感染白色念珠菌。该研究表明,脂质体可作为新型免疫佐剂发挥作用,并成为产生针对iC的保护性免疫的有效工具。白色念珠菌感染。

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