# Ten-Year Follow-Up of Taliglucerase Alfa in Type 1 Gaucher Disease: Real-World Evidence from Albania

## TL;DR

A 10-year study in Albania shows that taliglucerase alfa is effective and safe for treating Gaucher disease type 1, both in new and previously treated patients.

## Contribution

This study provides long-term real-world evidence on the efficacy and safety of taliglucerase alfa in Gaucher disease type 1 patients over a decade.

## Key findings

- Hemoglobin and platelet counts improved or remained stable in all patients over 10 years.
- Liver and spleen volumes decreased significantly in treatment-naïve patients after five years.
- Glucosylsphingosine was identified as a highly sensitive biomarker for treatment response.

## Abstract

Background/Objectives: Gaucher disease type 1 is an autosomal recessive lysosomal storage disorder caused by pathogenic variants in the GBA1 gene. Although enzyme replacement therapy has improved patient outcomes, there is limited long-term real-world data on taliglucerase alfa. This study aimed to evaluate the long-term efficacy and safety of taliglucerase alfa in both treatment-naïve and previously treated patients with Gaucher disease type 1 over a 10-year period. Methods: This prospective, single-centre cohort study involved 29 patients (13 treatment-naïve and 16 previously treated with imiglucerase) who received taliglucerase alfa from 2015 to 2024. Clinical, hematological, visceral, skeletal, and biochemical parameters were assessed at baseline and at 12, 60, and 120 months. Biomarkers included chitotriosidase and glucosylsphingosine. Safety was evaluated through adverse event reporting and anti-drug antibody testing. Results: Hemoglobin and platelet counts improved or remained stable in all patients. By 60 months, liver volume had normalised in treatment-naïve patients (mean reduction: 23.1%), while spleen volume had decreased by up to 47.3%. Lyso-Gb1 levels decreased by 86.1% in patients who had not previously received treatment and by 59.5% overall, with a strong correlation to adherence. Bone mineral density improved in most cases. 137 adverse events were reported, 24% of which were mild infusion-related reactions. Anti-drug antibody developed in two patients, including one with a reduced therapeutic response. Conclusions: Taliglucerase alfa offers sustained long-term clinical, hematological and biochemical benefits in both treatment-naïve and previously treated Gaucher disease type 1 patients, with a favorable safety profile. Glucosylsphingosine proved to be a highly sensitive biomarker for monitoring therapeutic efficacy and detecting treatment response.