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Erschienen in: Cancer Immunology, Immunotherapy 11/2011

01.11.2011 | Original article

Comprehensive immunological analyses of colorectal cancer patients in the phase I/II study of quickly matured dendritic cell vaccine pulsed with carcinoembryonic antigen peptide

verfasst von: Mitsuru Sakakibara, Tatsuya Kanto, Michiyo Hayakawa, Shoko Kuroda, Hideki Miyatake, Ichiyo Itose, Masanori Miyazaki, Naruyasu Kakita, Koyo Higashitani, Tokuhiro Matsubara, Naoki Hiramatsu, Akinori Kasahara, Tetsuo Takehara, Norio Hayashi

Erschienen in: Cancer Immunology, Immunotherapy | Ausgabe 11/2011

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Abstract

Dendritic cell (DC) vaccine has been used to treat patients with advanced colorectal cancer (CRC). The results of vaccine-induced clinical responses have not always been satisfactory partially because of DC incompetence. In order to evaluate the feasibility of novel mature DCs for therapeutic adjuvants against CRC, we conducted clinical trials with carcinoembryonic antigen (CEA) peptide-loaded DC quickly generated with a combination of OK432 (Streptococcuspyogenes preparation), prostanoid, and interferon-α (OPA-DC). In the ten patients enrolled in this study, the OPA-DC vaccine was well tolerated and administered four times every 2 weeks except for two patients, who were switched to other treatments due to disease progression. Among the eight evaluable patients, one displayed stable disease (SD), while the remaining seven showed progressive disease (PD). In the SD patient, natural killer (NK) cell frequency and cytolytic activity were increased. In the same patient, the frequency of CEA-specific cytotoxic T cells (CTLs) increased stepwise with repetitive vaccinations; however, most of the CTLs exhibited central memory phenotype. In those with PD, NK cells proliferated well regardless of failure of response, whereas CTLs failed to do so. We concluded that the OPA-DC vaccine is well tolerated and has immune-stimulatory capacity in patients with CRC. Additional modulation is needed to attain significant clinical impact.
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Metadaten
Titel
Comprehensive immunological analyses of colorectal cancer patients in the phase I/II study of quickly matured dendritic cell vaccine pulsed with carcinoembryonic antigen peptide
verfasst von
Mitsuru Sakakibara
Tatsuya Kanto
Michiyo Hayakawa
Shoko Kuroda
Hideki Miyatake
Ichiyo Itose
Masanori Miyazaki
Naruyasu Kakita
Koyo Higashitani
Tokuhiro Matsubara
Naoki Hiramatsu
Akinori Kasahara
Tetsuo Takehara
Norio Hayashi
Publikationsdatum
01.11.2011
Verlag
Springer-Verlag
Erschienen in
Cancer Immunology, Immunotherapy / Ausgabe 11/2011
Print ISSN: 0340-7004
Elektronische ISSN: 1432-0851
DOI
https://doi.org/10.1007/s00262-011-1051-1

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