Oral DNA vaccines target the tumor vasculature and microenvironment and suppress tumor growth and metastasis.

Oral DNA vaccines target the tumor vasculature and microenvironment and suppress tumor growth and metastasis.
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口服 DNA 疫苗针对肿瘤脉管系统和微环境,抑制肿瘤生长和转移。

DOI:
10.1111/j.1600-065x.2008.00613.x
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发表时间:
2008
影响因子:
8.7
通讯作者:
Reisfeld,RalphA
Reisfeld,RalphA
中科院分区:
医学1区
文献类型:
--
作者:
Xiang,Rong;Luo,Yunping;Niethammer,AndreasG;Reisfeld,RalphA

文献摘要

参考文献

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四种新型口服DNA疫苗在小鼠模型中提供针对黑素瘤、结肠癌、乳腺癌和肺癌的保护。疫苗通过减毒鼠伤寒沙门氏菌递送至次级淋巴器官,并分别靶向血管内皮生长因子受体-2、转录因子Fos相关抗原-1、抗凋亡蛋白生存素和Legumain,Legumain是一种在肿瘤微环境(TME)中肿瘤相关巨噬细胞(TAM)上特异性过表达的天冬酰胺酰内肽酶。这些疫苗都能够诱导针对自身抗原的有效细胞介导的保护性免疫,从而显著抑制肿瘤生长和传播。这些DNA疫苗诱导的关键机制包括有效抑制肿瘤血管系统中的血管生成以及细胞毒性T细胞、自然杀伤细胞和抗原呈递树突状细胞的显著活化。靶向Legumain的疫苗建立了新的范例,其中TME中TAM密度的降低减少了增强肿瘤生长和血管生成的因子的释放。这反过来又重塑了TME并降低了其免疫抑制环境,从而增强了DNA疫苗有效抑制肿瘤细胞增殖、血管形成和转移的能力。预计这种研究工作将导致新的基于DNA的疫苗,将有效地治疗癌症。
Four novel oral DNA vaccines provide protection against melanoma, colon, breast, and lung carcinoma in mouse models. Vaccines are delivered by attenuatedSalmonella typhimuriumto secondary lymphoid organs and respectively target vascular endothelial growth factor receptor‐2, transcription factor Fos‐related antigen‐1, anti‐apoptosis protein survivin and Legumain, an asparaginyl endopeptidase specifically overexpressed on tumor‐associated macrophages (TAMs) in the tumor microenvironment (TME). These vaccines are all capable of inducing potent cell‐mediated protective immunity against self‐antigens, resulting in marked suppression of tumor growth and dissemination. Key mechanisms induced by these DNA vaccines include efficient suppression of angiogenesis in the tumor vasculature and marked activation of cytotoxic T cells, natural killer cells, and antigen‐presenting dendritic cells. The vaccine targeting Legumain establishes the new paradigm whereby a reduction in the density of TAMs in the TME decreases the release of factors potentiating tumor growth and angiogenesis. This, in turn, remodels the TME and decreases its immunosuppressive milieu and thereby potentiates the DNA vaccine's ability to effectively suppress tumor cell proliferation, vascularization, and metastasis. It is anticipated that such research efforts will lead to novel DNA‐based vaccines that will be effective for the treatment of cancer.
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