A scoping review exploring cure definitions and language for inherited hemoglobinopathies

Sickle cell disease and beta thalassemia are some of the first targets for potentially curative cell-based therapies. Currently, bone marrow transplants, stem cell transplants, and gene therapy are being researched and utilized for people living with these hemoglobinopathies. Although these therapies are often described as curative, there is not a clear definition of what cure means for these hemoglobinopathies.

Five databases were searched for this scoping review. Two reviewers screened each article at the title/abstract and full text levels using Covidence. Articles were included if they were (1) about bone marrow transplants, stem cell transplants, or gene therapy; (2) conditions of focus were sickle cell disease or beta thalassemia; and (3) reported original data on clinical outcomes, psychosocial outcomes, or key stakeholder perspectives and opinions. Data were collected by 2 reviewers also using Covidence, and analyses were conducted in Excel and R.

We found that, although cure is widely and indiscriminately used, it is not often defined, and when cure is defined, there is no clear convergence or consensus on the definition. Furthermore, cure is often qualified and undefined euphemisms for cure are often used. We also report the major ways in which the success and complications of these treatment modalities are described.

We frame the significance of our findings by discussing their scientific, ethical, and social implications and focus on the need for precise and clear terminology that centers lived experience and acknowledges the interplay between scientific and lay expertise and perceptions.