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Real‐world effectiveness of eliglustat in treatment‐naïve and switch patients enrolled in the International Collaborative Gaucher Group Gaucher Registry
Author(s) -
Mistry Pramod K.,
Balwani Manisha,
Charrow Joel,
Kishnani Priya,
Niederau Claus,
Underhill Lisa H.,
McClain Monica R.
Publication year - 2020
Publication title -
american journal of hematology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.456
H-Index - 105
eISSN - 1096-8652
pISSN - 0361-8609
DOI - 10.1002/ajh.25875
Subject(s) - medicine , enzyme replacement therapy , gastroenterology , splenectomy , spleen , disease
Eliglustat is a first‐line oral therapy for adults with Gaucher disease type 1 (GD1) with extensive, intermediate, or poor CYP2D6‐metabolizer phenotypes (90% of patients). We report real‐world outcomes after 2 years of eliglustat therapy in the International Collaborative Gaucher Group Gaucher Registry (NCT00358943). As of January 2019, baseline and 2‐year data (±1 year) were available for 231 eliglustat‐treated GD1 patients: 19 treatment‐naïve (zero splenectomized) and 212 ERT patients who switched to eliglustat (36 splenectomized). Most patients (89%) were from the United States, where eliglustat was first approved. In treatment‐naïve patients, mean hemoglobin increased from 12.4 to 13.4 g/dL ( P = .004, n = 18), mean platelet count increased from 113 to 156 × 10 9 /L ( P < .001, n = 17); mean spleen volume decreased from 7.4 to 3.5 multiples of normal (MN) ( P = .02, n = 7); mean liver volume remained normal (n = 7), and median spine Z‐score was unchanged (−1.3 to −1.2, n = 6). In non‐splenectomized switch patients, mean hemoglobin remained stable/non‐anemic (n = 167); mean platelet count remained stable/normal (n = 165); mean spleen volume decreased from 3.3 to 2.8 MN ( P < .001, n = 64); mean liver volume remained normal (n = 63), and median lumbar spine Z‐score improved from −0.7 to −0.4 ( P = .014, n = 68). In splenectomized switch patients, mean hemoglobin remained stable/non‐anemic (n = 31); mean platelet count increased from 297 to 324 × 10 9 /L (non‐significant, n = 29); mean liver volume remained normal (n = 13); median spine Z‐score improved from −0.8 to −0.6 (non‐significant, n = 11). Median chitotriosidase decreased in all groups ( P < .01 for all). These real‐world results are consistent with eliglustat clinical trial results demonstrating long‐term benefit in treatment‐naïve patients and stability in ERT switch patients.