Hematologists Consider Where New Therapies Fit In Sickle Cell Treatment Paradigm

Potential Cures May Not Be Available To All

The first gene editing medicine and gene therapy for sickle cell disease were approved as the ASH meeting got under way, but novel oral drugs may be key to making treatment more accessible.

Normal red blood cell and sickle cell flow inside in artery
Hematologists considered use of new sickle cell treatments at ASH • Source: Shutterstock

The US Food and Drug Administration approvals of Vertex Pharmaceuticals Incorporated/CCRISPR Therapeutics AG’s gene editing medicine Casgevy (exagamglogene-autotemcel, exa-cel) and bluebird bio inc.’s gene therapy Lyfgenia (lovotibeglogene autotemcel, lovo-cel) gave doctors two new options to consider for patients with sickle cell disease (SCD) and a lot to discuss about how these novel treatments will be used going forward during the recent American Society of Hematology (ASH) annual meeting.

Key Takeaways
  • Vertex/CRISPR’s Casgevy and bluebird’s Lyfgenia are the first two genetic medicines to treat sickle cell disease, giving doctors and patients a new potentially curative option, but at high costs and with complex administration that may limit the treatments’ use, both within and outside the US.

  • Doctors are trying to determine where the gene editing medicine Casgevy and gene therapy Lyfgenia will fit in the treatment landscape where oral drugs and transplants also are options

The 8 December approvals for both products to treat SCD patients aged 12 and older with recurrent vaso-occlusive crises (VOCs) or a history of vaso-occlusive events (VOEs) were hailed as breakthroughs for the field. However, the complex administration of the one-time therapies and their high list prices – $2.2m for Casgevy and $3

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