Feasibility analysis of p62 (SQSTM1)-encoding DNA vaccine as a novel cancer immunotherapy.

Feasibility analysis of p62 (SQSTM1)-encoding DNA vaccine as a novel cancer immunotherapy.
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DOI:
10.3109/08830185.2014.954699
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发表时间:
2014-10
影响因子:
5
通讯作者:
Shifrin VI
Shifrin VI
中科院分区:
医学3区
文献类型:
--
作者:
Gabai VL;Shifrin VI

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癌症免疫疗法是一个蓬勃发展的领域,但迄今为止其临床成就还很有限。其主要障碍之一似乎是找到一种可行的癌症抗原作为免疫反应的目标。经过多年的研究,出现了肿瘤抗原选择的三个主要标准。抗原应具有: (i) 免疫原性; (ii) 对于癌细胞至关重要(以避免其因免疫编辑而丢失),但对于正常组织来说是可有可无的,以降低毒性风险,以及 (iii) 与正常组织相比,在肿瘤中过度表达。在这里,我们认为p62(SQSTM1)是一种参与自噬和信号转导的蛋白质,符合上述所有标准,可以被选为新型癌症抗原。因此,我们进行了广泛的研究,发现p62编码DNA疫苗在五种常用的小鼠和大鼠移植性肿瘤模型以及几种狗的自发性肿瘤中具有抗肿瘤和抗转移活性。鉴于 p62 疫苗的毒性(如果有的话)也很小,我们认为 p62 编码疫苗值得进一步的临床开发。
Cancer immunotherapy is a thriving field, but its clinical achievements are modest so far. One of its major hurdles seems to be finding a feasible cancer antigen as a target for immune response. After many years of research, three major criteria for choice of tumor antigens emerged. An antigen should be: (i) immunogenic; (ii) essential for cancers cells (to avoid its loss through immunoediting), but dispensable for normal tissues to reduce the risk of toxicity, and (iii) overexpressed in tumors as compared to the normal tissues. Here we argue that p62 (SQSTM1), a protein involved in autophagy and signal transduction, fits all the above criteria and can be chosen as a novel cancer antigen. Accordingly, we carried out an extensive study and found antitumor and antimetastatic activity of p62-encoding DNA vaccine in five types of commonly used transplantable tumor models of mice and rats, and spontaneous tumors in several dogs. Given that toxicity of p62 vaccine was minimal, if any, we believe that p62-encoding vaccine merits further clinical development.
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