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-Structure paper
タイトル | An inhaled ACE2 decoy confers protection against SARS-CoV-2 infection in preclinical models. |
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ジャーナル・号・ページ | Sci Transl Med, Vol. 15, Issue 711, Page eadi2623, Year 2023 |
掲載日 | 2023年8月30日 |
著者 | Emiko Urano / Yumi Itoh / Tatsuya Suzuki / Takanori Sasaki / Jun-Ichi Kishikawa / Kanako Akamatsu / Yusuke Higuchi / Yusuke Sakai / Tomotaka Okamura / Shuya Mitoma / Fuminori Sugihara / Akira Takada / Mari Kimura / Shuto Nakao / Mika Hirose / Tadahiro Sasaki / Ritsuko Koketsu / Shunya Tsuji / Shota Yanagida / Tatsuo Shioda / Eiji Hara / Satoaki Matoba / Yoshiharu Matsuura / Yasunari Kanda / Hisashi Arase / Masato Okada / Junichi Takagi / Takayuki Kato / Atsushi Hoshino / Yasuhiro Yasutomi / Akatsuki Saito / Toru Okamoto / |
PubMed 要旨 | The Omicron variant continuously evolves under the humoral immune pressure exerted by vaccination and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, and the resulting Omicron ...The Omicron variant continuously evolves under the humoral immune pressure exerted by vaccination and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, and the resulting Omicron subvariants display further immune evasion and antibody escape. An engineered angiotensin-converting enzyme 2 (ACE2) decoy composed of high-affinity ACE2 and an IgG1 Fc domain could offer an alternative modality to neutralize SARS-CoV-2. We previously reported its broad spectrum and therapeutic potential in rodent models. Here, we demonstrate that the engineered ACE2 decoy retains neutralization activity against Omicron subvariants, including the currently emerging XBB and BQ.1 strains, which completely evade antibodies currently in clinical use. SARS-CoV-2, under the suboptimal concentration of neutralizing drugs, generated SARS-CoV-2 mutants escaping wild-type ACE2 decoy and monoclonal antibodies, whereas no escape mutant emerged against the engineered ACE2 decoy. Furthermore, inhalation of aerosolized decoys improved the outcomes of rodents infected with SARS-CoV-2 at a 20-fold lower dose than that of intravenous administration. Last, the engineered ACE2 decoy exhibited therapeutic efficacy for cynomolgus macaques infected with SARS-CoV-2. These results indicate that this engineered ACE2 decoy represents a promising therapeutic strategy to overcome immune-evading SARS-CoV-2 variants and that liquid aerosol inhalation could be considered as a noninvasive approach to enhance the efficacy of COVID-19 treatments. |
リンク | Sci Transl Med / PubMed:37647387 |
手法 | EM (単粒子) |
解像度 | 3.2 - 3.9 Å |
構造データ | EMDB-35029: SARS-CoV2 spike protein with ACE2, no ACE2 binding. EMDB-35030: SARS-CoV2 spike protein with ACE2. 1 ACE2 bound form. EMDB-35031: SARS-CoV2 spike protein with ACE2. 2 ACE2 bound form. EMDB-35032: SARS-CoV2 spike protein with ACE2. 3 ACE2 bound form. EMDB-35036: SARS-CoV2 spike protein with ACE2 decoy.no ACE2 decoy binding EMDB-35037: SARS-CoV2 spike protein with ACE2 decoy. 1 ACE2 decoy bound form. EMDB-35038: SARS-CoV2 spike protein with ACE2 decoy. 1 ACE2 decoy bound and 2 RBD up form. EMDB-35039: SARS-CoV2 spike protein with ACE2 decoy. 2 ACE2 decoy bound form. EMDB-35040: SARS-CoV2 spike protein with ACE2 decoy. 3 ACE2 decoy bound form. EMDB-36345, PDB-8jje: |
化合物 | ChemComp-NAG: ChemComp-ZN: ChemComp-SO4: ChemComp-HOH: |
由来 |
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キーワード | VIRAL PROTEIN/PROTEIN BINDING / SARS-CoV2 / spike protein / ACE2 / ACE2 decoy / VIRAL PROTEIN / VIRAL PROTEIN-PROTEIN BINDING complex |