+検索条件
-Structure paper
| タイトル | Generation of actionable, cancer-specific neoantigens from KRAS(G12C) with adagrasib. |
|---|---|
| ジャーナル・号・ページ | Proc Natl Acad Sci U S A, Vol. 122, Issue 31, Page e2509012122, Year 2025 |
| 掲載日 | 2025年8月5日 |
著者 | Lorenzo Maso / Epsa Rajak / Takamitsu Hattori / Zhengshan Hu / Akiko Koide / Benjamin G Neel / Shohei Koide / ![]() |
| PubMed 要旨 | Effective immune therapy against cancer ideally should target a cancer-specific antigen, an antigen that is present exclusively in cancer cells. However, there is a paucity of cancer-specific ...Effective immune therapy against cancer ideally should target a cancer-specific antigen, an antigen that is present exclusively in cancer cells. However, there is a paucity of cancer-specific antigens that are endogenously produced. HapImmune™ technology utilizes covalent inhibitors directed to an intracellular cancer driver to create cancer-specific neoantigens in the form of drug-peptide conjugates presented by class I MHC molecules. Our previous study with sotorasib, an FDA-approved covalent inhibitor of KRAS(G12C), demonstrated that drug-treated cells produce such neoantigens and can be killed by T cell engagers directed against the drug-peptide/MHC complex. Thus, this technology can unite targeted and immune therapies. In the present study, we examined whether this approach could generalize to another FDA-approved KRAS(G12C) inhibitor, adagrasib, whose chemical structure and cysteine reactivity differ substantially from sotorasib. We developed antibodies selective to adagrasib-KRAS(G12C) peptides presented by HLA-A*03 and A*11 that also show cross-reactivity to other KRAS(G12C) inhibitors presented in the same manner. Cryoelectron microscopy structures revealed a mode of adagrasib-peptide/HLA recognition distinctly different from that of sotorasib-directed HapImmune antibodies. The antibodies in a bispecific T cell engager format killed adagrasib-resistant lung cancer cells upon adagrasib treatment. These results support the broad applicability of the HapImmune approach for creating actionable cancer-specific neoantigens and offer candidates for therapeutic development. |
リンク | Proc Natl Acad Sci U S A / PubMed:40737322 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.88 Å |
| 構造データ | EMDB-70124, PDB-9o55: |
| 化合物 | ![]() PDB-1b8e: |
| 由来 |
|
キーワード | IMMUNE SYSTEM / Complex / Fab |
ムービー
コントローラー
構造ビューア
万見文献について



著者
リンク


homo sapiens (ヒト)
キーワード