WEKO3
アイテム
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MICA/B expression is often found in several types of cancer but is restricted in normal tissues. Here, we show that an α-particle emitting astatine-211 (211At)-\nlabeled antibody targeting MICA/B (211At-anti MICA/B Ab) efficiently ablates cancer cells in vitro and in vivo. We generated 211At-anti MICA/B Ab, an anti-MICA/B antibody conjugated with a highly cytotoxic α-particle emitting radionuclide 211At. 211At-anti MICA/B Ab binds to human osteosarcoma SaOS2 and U2OS cells that exhibit high levels of MICA/B expression and efficiently kills those cells in vitro. Biodistribution analysis using xenograft mouse models of HCT116 p53-/- positive for MICA/B expression, showed increased 211At in the xenografts for up to 22 h after injection as time proceeded. A single dose of 211At-anti MICA/B Ab (1 MBq) showed significant reduction in the tumor growth rate of HCT116 p53-/- xenografts compared to 211At-labeled mouse IgG (1 MBq) at 21 days after injection. 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Targeted cancer cell ablation in mice by an α-particle-emitting astatine-211-labeled antibody against major histocompatibility complex class I chain-related protein A and B
https://repo.qst.go.jp/records/49315
https://repo.qst.go.jp/records/49315ca0a9d39-b1a3-4912-aa5a-3de47c6cdd0c
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2018-11-06 | |||||
タイトル | ||||||
タイトル | Targeted cancer cell ablation in mice by an α-particle-emitting astatine-211-labeled antibody against major histocompatibility complex class I chain-related protein A and B | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Keiko Li, Huizi
× Keiko Li, Huizi× Hasegawa, Sumitaka× Izumi Nakajima, Nakako× Morokoshi, Yukie× Minegishi, Katsuyuki× Nagatsu, Kotaro× Li, Huizi× Hasegawa, Sumitaka× Nakajima, Nakako× Morokoshi, Yukie× Minegishi, Katsuyuki× Nagatsu, Kotaro |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Major histocompatibility complex class I chain-related protein A and B (MICA/B) are ligands of the immune receptor, natural-killer group 2 member D. MICA/B expression is often found in several types of cancer but is restricted in normal tissues. Here, we show that an α-particle emitting astatine-211 (211At)- labeled antibody targeting MICA/B (211At-anti MICA/B Ab) efficiently ablates cancer cells in vitro and in vivo. We generated 211At-anti MICA/B Ab, an anti-MICA/B antibody conjugated with a highly cytotoxic α-particle emitting radionuclide 211At. 211At-anti MICA/B Ab binds to human osteosarcoma SaOS2 and U2OS cells that exhibit high levels of MICA/B expression and efficiently kills those cells in vitro. Biodistribution analysis using xenograft mouse models of HCT116 p53-/- positive for MICA/B expression, showed increased 211At in the xenografts for up to 22 h after injection as time proceeded. A single dose of 211At-anti MICA/B Ab (1 MBq) showed significant reduction in the tumor growth rate of HCT116 p53-/- xenografts compared to 211At-labeled mouse IgG (1 MBq) at 21 days after injection. No body weight loss and erythrocytopenia was evident in mice that received 211At-anti MICA/B. Leukocytopenia and thrombocytopenia were observed within a week after 211At-anti MICA/B injection, but counts of red blood cells and platelets were recovered to control levels at about 3-4 weeks after injection. Taken together, these data strongly demonstrate that targeted α-particle therapy using 211At-anti-MICA/B Ab emitting highly cytotoxic a-particles is a potential new therapeutic option for several types of cancer. |
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書誌情報 |
Biochemical and Biophysical Research Communications 巻 506, 号 4, p. 1078-1084, 発行日 2018-11 |
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出版者 | ||||||
出版者 | ELSEVIER | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0006-291X | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1016/j.bbrc.2018.10.157 | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://www.sciencedirect.com/science/article/pii/S0006291X18323428 |