Related Experiment Videos
Solution stability of factor Xa inhibitors as a function of pH
1Drug Development, Millennium Pharmaceuticals, Inc., Cambridge, Massachusetts 02139, USA. peiyangusa@yahoo.com
Drug Development and Industrial Pharmacy
|November 24, 2004
Summary
The stability of two factor Xa inhibitors (MLN1021 and CT54004) was assessed across a pH range. Both compounds demonstrated optimal stability around pH 6, crucial for developing stable formulations for clinical studies.
Area of Science:
- Pharmaceutical Chemistry
- Drug Stability Studies
- Formulation Development
Background:
- Factor Xa inhibitors are crucial anticoagulants.
- Understanding drug stability is vital for clinical application.
- MLN1021 and CT54004 are novel factor Xa inhibitors requiring characterization.
Purpose of the Study:
- To investigate the pH-dependent stability of MLN1021 and CT54004.
- To determine the optimal pH for stable formulations.
- To inform the design of future clinical studies, including first-in-person (FIP) trials.
Main Methods:
- Compounds were dissolved in buffer solutions across a pH range of 1-10.
- Samples were stored at elevated temperature (60°C) to accelerate degradation.
- Purity and pH were monitored at various time points to establish pH-rate profiles.
Main Results:
- Both MLN1021 and CT54004 exhibited significant stability in the mid-pH range.
- Instability was observed at extreme pH values (below 3 and above 8).
- Optimal stability for both inhibitors was found to be approximately pH 6.
Conclusions:
- The optimal pH for MLN1021 and CT54004 stability is around 6.
- The stability profile is not governed by specific acid/base catalysis.
- Findings provide a basis for formulation development and experimental design for similar drug candidates.