PMID- 37047707 OWN - NLM STAT- MEDLINE DCOM- 20230414 LR - 20230415 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 24 IP - 7 DP - 2023 Apr 4 TI - High-Dose Ambroxol Therapy in Type 1 Gaucher Disease Focusing on Patients with Poor Response to Enzyme Replacement Therapy or Substrate Reduction Therapy. LID - 10.3390/ijms24076732 [doi] LID - 6732 AB - Ambroxol hydrochloride (ABX), an oral mucolytic drug available over the counter for many years, acts as a pharmacological chaperone for mutant glucocerebrosidase, albeit at higher doses. Proof-of-concept reports have been published over the past decade on all three types of Gaucher disease (GD). Here, we assess the safety and efficacy of 12 months of 600 mg ambroxol per day in three groups of Type 1 GD patients with a suboptimal response to enzyme replacement therapy (ERT) or substrate reduction therapy (SRT), defined as platelet count < 100 x 10(3)/L, lumbar spine bone density T-score < -2.0, and/or LysoGb1 > 200 ng/mL, and for a group of naive patients who had abnormal values in two of these three parameters. We enrolled 40 patients: 28 ERT- or SRT-treated, and 12 naive. There were no severe adverse effects (AEs). There were 24 dropouts, mostly due to AEs (n = 12), all transient, and COVID-19 (n = 7). Among the 16 completers, 5 (31.2%) had a >20% increase in platelet count, 6 (37.5%) had a >0.2 increase in T-score, and 3 (18.7%) had a >20% decrease in Lyso-Gb1. This study expands the number of patients exposed to high-dose ABX, showing good safety and satisfactory efficacy, and provides an additional rationale for adding off-label ABX to the arsenal of therapies that could be offered to patients with GD1 and a suboptimal response or those unable to receive ERT or SRT. FAU - Istaiti, Majdolen AU - Istaiti M AUID- ORCID: 0000-0001-7598-2828 AD - Gaucher Unit, Shaare Zedek Medical Center, Jerusalem 9103102, Israel. FAU - Frydman, Dafna AU - Frydman D AD - Gaucher Unit, Shaare Zedek Medical Center, Jerusalem 9103102, Israel. FAU - Dinur, Tama AU - Dinur T AD - Gaucher Unit, Shaare Zedek Medical Center, Jerusalem 9103102, Israel. FAU - Szer, Jeff AU - Szer J AUID- ORCID: 0000-0001-6783-2301 AD - Peter MacCallum Center, Royal Melbourne Hospital, Department of Medicine, University of Melbourne, Melbourne, VIC 3050, Australia. FAU - Revel-Vilk, Shoshana AU - Revel-Vilk S AUID- ORCID: 0000-0001-9151-0337 AD - Gaucher Unit, Shaare Zedek Medical Center, Jerusalem 9103102, Israel. AD - Faculty of Medicine, Hebrew University, Jerusalem 91120, Israel. FAU - Zimran, Ari AU - Zimran A AUID- ORCID: 0000-0003-0077-8608 AD - Gaucher Unit, Shaare Zedek Medical Center, Jerusalem 9103102, Israel. AD - Faculty of Medicine, Hebrew University, Jerusalem 91120, Israel. LA - eng GR - IISR-2017-104260/Takeda (Japan)/ PT - Journal Article DEP - 20230404 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 200168S0CL (Ambroxol) SB - IM MH - Humans MH - *Gaucher Disease/drug therapy MH - *Ambroxol/therapeutic use MH - Enzyme Replacement Therapy MH - *COVID-19 MH - Lumbar Vertebrae PMC - PMC10095311 OTO - NOTNLM OT - Gaucher disease (GD) OT - Lyso-Gb1 OT - ambroxol OT - chaperone therapy OT - enzyme replacement therapy (ERT) OT - suboptimal response OT - substrate reduction therapy (SRT) COIS- The Gaucher unit receives support from Sanofi/Genzyme for participation in the ICGG registry from Takeda-for GOS and Pfizer for TALIAS, and research grants from Shire (now Takeda), Pfizer, Sanofi/Genzyme, and Centogene. M.I., D.F., and T.D., no conflicts to declare. J.S. received honoraria and consultancy fees from Takeda, Alexion, Arrowhead, Eli Lilly, Kira, Novartis, Sobi, and Samsung Bioepis. S.R.-V. received research grants, speaker fees, travel support, and advisory fee from Pfizer, Sanofi Genzyme, and Takeda. A.Z. received honoraria from Takeda, Pfizer, and BioEvents, and consulting fees from Prevail Therapeutics and Takeda. EDAT- 2023/04/14 06:00 MHDA- 2023/04/14 06:42 PMCR- 2023/04/04 CRDT- 2023/04/13 01:14 PHST- 2023/03/14 00:00 [received] PHST- 2023/03/27 00:00 [revised] PHST- 2023/04/03 00:00 [accepted] PHST- 2023/04/14 06:42 [medline] PHST- 2023/04/13 01:14 [entrez] PHST- 2023/04/14 06:00 [pubmed] PHST- 2023/04/04 00:00 [pmc-release] AID - ijms24076732 [pii] AID - ijms-24-06732 [pii] AID - 10.3390/ijms24076732 [doi] PST - epublish SO - Int J Mol Sci. 2023 Apr 4;24(7):6732. doi: 10.3390/ijms24076732.