4.2 Article

Sustained Remission Off-Treatment (SROT) of TPO-RAs: The Burgos Ten-Step Eltrombopag Tapering Scheme

Journal

MEDICINA-LITHUANIA
Volume 59, Issue 4, Pages -

Publisher

MDPI
DOI: 10.3390/medicina59040659

Keywords

tapering; sustained remission off-treatment (SROT); discontinuation; TPO-RAs; eltrombopag; romiplostim; avatrombopag

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TPO-RAs have shown high efficacy rates (59-88%), durable responses (up to three years), and a satisfactory safety profile in clinical trials. Some studies have reported the possibility of successfully discontinuing TPO-RAs without further treatment. We propose a protocol for successfully tapering and discontinuing TPO-RAs in daily clinical practice.
Background and Objectives: TPO-RAs (romiplostim/eltrombopag/avatrombopag) have broadly demonstrated high efficacy rates (59-88%), durable responses (up to three years) and a satisfactory safety profile in clinical trials. The effect of TPO-RAs is classically considered to be transient because platelet numbers usually dropped rapidly to baseline unless therapy was maintained. However, several groups have reported the possibility of successfully discontinuing TPO-RAs in some patients without further need for concomitant treatments. This concept is usually referred as sustained remission off-treatment (SROT). Materials and Methods: Unfortunately, we still lack predictors of the response to discontinuation even after the numerous biological, clinical and in vitro studies performed to study this phenomenon. The frequency of successful discontinuation is matter of controversy, although a percentage in the range of 25-40% may probably be considered a consensus. Here, we describe all major routine clinical practice studies and reviews that report the current position on this topic and compare them with our own results in Burgos. Results: We report our Burgos ten-step eltrombopag tapering scheme with which we have achieved an elevated percentage rate of success (70.3%) in discontinuing treatment. Conclusions: We hope this protocol may help successfully taper and discontinue TPO-RAs in daily clinical practice.

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