Eltrombopag newly features in new guidelines for the diagnosis and management of aplastic anaemia (AA), with experts backing its use in the as yet unlicensed first-line setting.
In updated guidance published in the British Journal of Haematology, use of the thrombopoietin (TPO) receptor agonist has been endorsed as standard first-line treatment alongside anti-thymocyte globulin (ATG)-based immunosuppressive therapy for newly diagnosed acquired severe or very severe AA.
However, the drug should only be considered in the absence of a matched sibling donor for allogeneic haematopoietic stem cell transplantation (HSCT), and should be used “with meticulous long-term monitoring for clonal evolution”, the UK-based guideline group noted.
The guideline authors recommended earlier use of eltrombopagin the treatment pathway – pending regulatory approval – on the back of a Phase III study that compared first-line ATG and ciclosporin with or without eltrombopag for severe or very severe AA.
This showed that the drug induced a significant increase in complete response (CR) compared with standard immunosuppressive therapy at both 3 (22% vs 10%) and 6 months (68% vs 41%), with a shorter median time to response (3 vs 8.8 months) and without a compromise in treatment tolerability.
While there didn’t seem to be a difference on two-year overall survival between the two treatment arms, longer-term data will be necessary to determine ciclosporin and eltrombopag dependence, late relapses and clonal evolution, the group noted.