Eliglustat tartrate has the ability to inhibit target enzymes and has good potency, with an IC50 of 24 nM [1]. The addition of Genz-112638 (0.6-1000 nM) to K562 or B16/F10 cells over a period of 72 hours led in a delayed suppression of GM1 and GM3 cell surfaces, with an average IC50 of 24 nM (range 14-1000 nM) in K562 cells. 34 nM), with an average IC50 value for GM3 inhibition in B16/F10 cells of 29 nM (range 12-34 nM). 48 nanometers)[1].

In comparison to age-matched control animals, mice with a significant accumulation of substrate prior to therapy had lower levels of step ceramide and fewer Gaucher cells in their spleen, lung, and heart [1].

Absorption, Distribution and Excretion
Eliglustat administered in multiple doses of 84 mg twice daily had a Cmax of 12.1 to 25.0 ng/mL in CYP2D6 extensive metabolizers (EMs), 44.6 ng/mL in CYP2D6 intermediate metabolizers (IMs), and 113 to 137 ng/mL in CYP2D6 poor metabolizers (PMs). The median Tmax was 1.5-2 hr in CYP2D6 EMs, 2 hr in CYP2D6 IMs, and 3 hr in CYP2D6 PMs. The AUCtau was 76.3-143 ng∙hr/mL in CYP2D6 EMs, 306 ng∙hr/mL in CYP2D6 IMs, and 922-1057 ng∙hr/mL in CYP2D6 PMs. In CYP2D6 EMs, the pharmacokinetics of eliglustat is time-dependent, and for doses that range between 42 and 294 mg, exposure increases in a more than dose-proportional fashion. In CYP2D6 PMs, eliglustat pharmacokinetics is linear and time-independent. In a steady state, the systemic exposure of 84 mg eliglustat twice daily is 7- to 9-fold higher in CYP2D6 PMs compared to EMs. Following the oral administration of a single 84 mg dose of eliglustat, bioavailability in CYP2D6 EMs was lower than 5%. The low oral bioavailability of eliglustat suggests the role of transporters and/or an extensive first-pass metabolism. Eliglustat can be taken with or without food. In CYP2D6 EMs, severe renal impairment did not have an effect on eliglustat pharmacokinetics. The effect of renal impairment on eliglustat pharmacokinetics was not evaluated in CYP2D6 IMs, CYP2D6 PMs or CYP2D6 EMs with end-stage renal failure. Compared to CYP2D6 EMs with normal hepatic function, Cmax and AUC were 1.2-fold higher in CYP2D6 EMs with mild hepatic impairment, while Cmax and AUC were 2.8- and 5.2-fold higher, respectively, in CYP2D6 EMs with moderate hepatic impairment. The effect of mild and moderate hepatic impairment in CYP2D6 IMs and PMs, and the effect of severe hepatic impairment were not evaluated.
Eliglustat is mainly excreted in urine (42%) and feces (51%) as metabolites after oral administration.
In CYP2D6 extensive metabolizers (EM), the volume of distribution of eliglustat administered IV was 835 L.
In healthy CYP2D6 extensive metabolizers (EMs) administered 42 mg of eliglustat IV (0.5 times the recommended oral dose), clearance was 88 L/h (80-105 L/h).

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Metabolism / Metabolites
Eliglustat is mostly metabolized by CYP2D6, and to a lower extent, by CYP3A4. In patients that are CYP2D6 poor metabolizers (PMs), eliglustat is mainly metabolized by CYP3A4. The primary metabolic pathways of eliglustat involve the sequential oxidation of the octanoyl moiety and the 2,3-dihydro-1,4-benzodioxane moiety. The combination of these two pathways results in the production of several oxidative metabolites. After evaluating the potency of eliglustat metabolites, it was determined that none of them were active. Genz-399240 (M24) was identified as the major metabolite of eliglustat, while the rest of the metabolites contributed to less than 10% of total drug-related exposures. Genz-399240 (M24) did not show any major off-target effects; therefore, a transporter substrate specificity characterization was not performed.

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Biological Half-Life
Eliglustat has a terminal elimination half-life of 6.5 hours in CYP2D6 extensive metabolizers (EMs) and 8.9 h in CYP2D6 poor metabolizers (PMs).

Hepatotoxicity
In placebo controlled trials, liver test abnormalities were no more common with eliglustat than with placebo treatment, and what abnormalities occurred were mild and resolved spontaneously usually without need for dose interruption. During these premarketing clinical trials and since its more widespread clinical availability, no instances of acute liver injury with jaundice have been reported attributable to eliglustat. However, the total clinical experience with eliglustat use has been limited.
Likelihood score: E (unlikely cause of clinically apparent liver injury, but experience with its use is limited).

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Effects During Pregnancy and Lactation
◉ Summary of Use during Lactation
Because there is no published experience with eliglustat during breastfeeding, an alternate drug may be preferred, especially while nursing a newborn or preterm infant.
◉ Effects in Breastfed Infants
Relevant published information was not found as of the revision date.
◉ Effects on Lactation and Breastmilk
Relevant published information was not found as of the revision date.

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Protein Binding
In plasma, the protein binding of eliglustat goes from 76% to 83%.

[1]. A specific and potent inhibitor of glucosylceramide synthase for substrate inhibition therapy ofGaucher disease. Mol Genet Metab. 2007 Jul;91(3):259-68.

Pharmacodynamics
Eliglustat is a specific inhibitor of glucosylceramide synthase (IC₅₀ =10 ng/mL). In vitro studies suggest that eliglustat has minimal or no off-target activity against other glycosidases, such as α-glucosidase I and II, and lysosomal and non-lysosomal glucosylceramidases. At 8 times the recommended dose (800 mg) and a ​​mean peak concentration of 237 ng/mL, eliglustat did not have a clinically significant effect on QTc prolongation. However, modelling of PK/PD data predicts that at a plasma concentration of 500 ng/mL, PR, QRS and QTcF intervals increase 22, 7, and 13 msec, respectively. Since high plasma concentrations of eliglustat may increase the risk of cardiac arrhythmias, there are warnings and precautions for patients taking CYP2D6 or CYP3A4 inhibitors, those with specific CYP2D6 metabolizer status and different degrees of hepatic impairment. Depending on each case, the use of this drug is contraindicated, to be avoided, or requires dosage adjustment. Patients with preexisting cardiac disease (congestive heart failure, recent acute myocardial infarction, bradycardia, heart block, ventricular arrhythmia), long QT syndrome, or those taking Class IA or Class II antiarrhythmic drugs are advised to avoid eliglustat.

404.267

491833-29-5

Eliglustat hemitartrate;928659-70-5;Eliglustat-d15 tartrate;1884556-84-6;Eliglustat-d4

23652731

White to off-white solid powder

1.1±0.1 g/cm3

615.5±55.0 °C at 760 mmHg

326.1±31.5 °C

0.0±1.9 mmHg at 25°C

1.543

3.61

2

5

11

29

484

2

CCCCCCCC(N[C@H](CN1CCCC1)[C@@H](C2=CC=C(OCCO3)C3=C2)O)=O

N-((1R,2R)-1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-1-hydroxy-3-(pyrrolidin-1-yl)propan-2-yl)octanamide

FJZZPCZKBUKGGU-AUSIDOKSSA-N

Genz-99067 GENZ-112638Cerdelga Genz99067 UNIIN0493335P3GENZ 112638Genz 99067 GENZ112638 Eliglustat tartrate eliglustat hemitartrate Eliglustat trade name Cerdelga.

2934.99.9001

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

DMSO : ~100 mg/mL (~247.19 mM)

Solubility in Formulation 1: 2.5 mg/mL (6.18 mM) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), suspension solution; with sonication.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL.
Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution.

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Solubility in Formulation 2: ≥ 2.5 mg/mL (6.18 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.

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Solubility in Formulation 3: ≥ 2.5 mg/mL (6.18 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.

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 (Please use freshly prepared in vivo formulations for optimal results.)