Multiple Antigenic Peptides of Human Heparanase Elicit a Much More Potent Immune Response against Tumors

Multiple Antigenic Peptides of Human Heparanase Elicit a Much More Potent Immune Response against Tumors
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人乙酰肝素酶的多种抗原肽可引发更有效的抗肿瘤免疫反应

DOI:
10.1158/1940-6207.capr-11-0083
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发表时间:
2011-04
影响因子:
3.3
通讯作者:
杨仕明
杨仕明
中科院分区:
医学3区
文献类型:
--
作者:
杨仕明

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用于癌症免疫治疗的肽疫苗接种需要由肿瘤相关抗原 (TAA) 衍生的表位肽诱导理想的免疫反应。乙酰肝素酶在多种晚期肿瘤中广泛表达。越来越多的证据表明乙酰肝素酶可以作为肿瘤免疫治疗的通用TAA。然而,由于肽疫苗的免疫原性较低,通常无法在患者体内引发理想的针对肿瘤的免疫反应。为了提高肽疫苗的免疫原性,我们基于人类白细胞抗原(HLA)-A2-人类乙酰肝素酶的限制性细胞毒性T淋巴细胞(CTL)表位(我们之前确定为抗原载体)设计了三种4分支多抗原肽(MAP)。我们的结果表明,基于人乙酰肝素酶 HLA-A2 限制性 CLT 表位的 MAP 疫苗能够在体外和小鼠体内诱导 HLA-A2 限制性和乙酰肝素酶特异性 CTL。此外,与相应的线性肽相比,乙酰肝素酶 MAP 疫苗通过激活 CD8+ T 淋巴细胞并增加 IFN-γ 的释放,引发更强的肿瘤细胞裂解作用。然而,这些乙酰肝素酶特异性 CTL 不会裂解表达乙酰肝素酶的自体淋巴细胞和树突状细胞,这证实了这些 MAP 疫苗的安全性。因此,我们的研究结果表明,基于人乙酰肝素酶CTL表位的MAP疫苗具有广谱、高效、高特异性和安全性等优点,可作为肿瘤免疫治疗的有效免疫原。癌症预防研究; 4(8); 1285–95。 ©2011 AACR。
Peptide vaccination for cancer immunotherapy requires an ideal immune response induced by epitope peptides derived from tumor-associated antigens (TAA). Heparanase is broadly expressed in various advanced tumors. Accumulating evidence suggests that heparanase can serve as a universal TAA for tumor immunotherapy. However, due to the low immunogenicity of peptide vaccines, an ideal immune response against tumors usually cannot be elicited in patients. To increase the immunogenicity of peptide vaccines, we designed three 4-branched multiple antigenic peptides (MAP) on the basis of the human leukocyte antigen (HLA)-A2–restricted cytotoxic T lymphocyte (CTL) epitopes of human heparanase that we identified previously as antigen carriers. Our results show that MAP vaccines based on the HLA-A2–restricted CLT epitopes of human heparanase were capable of inducing HLA-A2–restricted and heparanase-specific CTL in vitro and in mice. Moreover, compared with their corresponding linear peptides, heparanase MAP vaccines elicited much stronger lysis of tumor cells by activating CD8+ T lymphocytes and increasing the releasing of IFN-γ. However, these heparanase-specific CTLs did not lyse heparanase-expressing autologous lymphocytes and dendritic cells, which confirm the safety of these MAP vaccines. Therefore, our findings indicate that MAP vaccines based on CTL epitopes of human heparanase can be used as potent immunogens for tumor immunotherapy because of advantages such as broad spectrum, high effectiveness, high specificity, and safety. Cancer Prev Res; 4(8); 1285–95. ©2011 AACR.
DOI: 10.1021/jo051065t
发表时间: 2005-07
期刊: The Journal of organic chemistry
影响因子: --
作者:
Xiangyang Wu;D. Bundle
通讯作者: Xiangyang Wu;D. Bundle
DOI: 10.1006/scbi.2001.0420
发表时间: 2002-04-01
影响因子: 14.5
作者:
Vlodavsky, I;Goldshmidt, O;Friedmann, Y
通讯作者: Friedmann, Y
DOI: --
发表时间: 1996-07
影响因子: 2.6
作者:
Steinman Rm
通讯作者: Steinman Rm
人乙酰肝素酶的细胞毒性 T 淋巴细胞表位可在小鼠体内引发有效的抗肿瘤免疫反应
DOI: 10.1007/s00262-010-0829-x
发表时间: 2010-02
期刊: Cancer Immunol Immunother (IF,4.293) (2011年6月SCI影响因子)
影响因子: --
作者:
汤旭东
通讯作者: 汤旭东
DOI: 10.1158/0008-5472.can-05-2363
发表时间: 2006-08-01
期刊: CANCER RESEARCH
影响因子: 11.2
作者:
Sommerfeldt, Nora;Beckhove, Philipp;Schirrmacher, Volker
通讯作者: Schirrmacher, Volker