RE: GAK stealing Avacta’s lunch?13 Jun 2025 07:36
Good news for those with myeloma but this is yet another ADC, with the usual ADC issues...
"Antibody drug conjugates are being developed for a range of cancers. The limitation is being able to design an antibody that can target the cancer alone. There is one that can target some types of breast cancer. Research is already taking place on stomach and bowel cancer."
Another limitation being the chemo being cleaved off elsewhere in the body, causing off-target toxicity.
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Belantamab mafodotin integrates an afucosylated monoclonal antibody and monomethyl auristatin F (MMAF) as its cytotoxic agent. It induces apoptosis in MM cells by disrupting microtubule formation and interfering with important signaling pathways.
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And, interestingly, based on reports dating from November 2022:
AI Overview
Belantamab mafodotin (Blenrep) has been withdrawn from the market in the US, Europe, and the UK, primarily due to concerns about its effectiveness in treating multiple myeloma. Specifically, a confirmatory trial (DREAMM-3) did not demonstrate a significant increase in progression-free survival compared to standard treatment.
Elaboration:
US Withdrawal:
The US Food and Drug Administration (FDA) withdrew belantamab mafodotin's accelerated approval based on the results of the DREAMM-3 trial, which did not meet the requirements of the FDA's accelerated approval regulations.
European Withdrawal:
The European Medicines Agency (EMA) recommended and the European Commission decided not to renew the conditional marketing authorization for Blenrep in the EU, citing that the benefits no longer outweighed the risks.
UK Withdrawal:
Similarly, the UK's marketing authorization for Blenrep was revoked, following the same concerns about efficacy and the non-renewal in the EU.
DREAMM-3 Trial:
The DREAMM-3 trial compared belantamab mafodotin to pomalidomide plus dexamethasone. While the trial found that belantamab mafodotin had a longer median progression-free survival (11.2 months vs. 7 months), it did not demonstrate superiority over the standard treatment, leading to its withdrawal.
Side Effects:
While the safety and tolerability profile of belantamab mafodotin was consistent with the established safety profile, with no new safety concerns, the decision to withdraw it was primarily based on the lack of efficacy in the DREAMM-3 trial.
Ongoing Trials:
Despite the withdrawals, research into belantamab mafodotin continues, with ongoing trials exploring its use in combination with other therapies for relapsed or refractory multiple myeloma.
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The DREAMM trials: https://clinicaltrials.gov/search?term=belantamab%20mafodotin%20dreamm