Advantages
- Completely different target from conventional anti-influenza viral drugs, synergistic effect when used in combination.
- This drug targets a host enzyme, making drug resistance less likely to
Background and Technology
| In the replication of some virus families, a process called cap snatching is essential, in which a portion of the host RNA is hijacked to allow its own replication. Influenza A and B viruses (IAV and IBV) in particular require maturation of CAP RNA by MTr1 (2′-O-ribose methyltransferase 1) in the host before cap snatching can occur. Conventional anti-influenza virus drugs have the weakness that they act directly on specific viral proteins, and thus drug resistance can easily emerge due to viral gene mutation. We screened for antiviral drugs that inhibit host MTr1 and suppress influenza virus replication and developed TMFT (trifluoromethyl-tubercidin, a natural product derivative from Streptomyces, shown left). TMFT inhibited IAV and IBV replication specifically and showed no cytotoxicity (center and right figures). |
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Reference and Patent
- Science 379, 586–591 (2023)
- Patent pending
Principal Investigator
Manabu IGARASHI (Hokkaido University International Institute for Zoonosis Control)
Current Stage and Next Step
- TFMT, a specific and non-toxic MTr1 inhibitor, was demonstrated to specifically inhibit replication of Cap Snatching-dependent viruses, IAV and IBV, and its mechanism was elucidated. We also confirmed its synergistic effect when used in combination with Xofluza, an existing anti-IAV drug.
- Seeking partners interested in developing TMFT-based or Cap Snatching-targeted anti-IAV drugs.
- Evaluations/feasibility study under a CDA, MTA, or research collaboration is available.
Project No. BK-04653