Optimization of Methodologies to Study Freeze/Thaw Processes in Drug Substance Bottles

Area of Science:

• Biopharmaceutical manufacturing
• Process engineering
• Drug substance stability

Background:

• Biological drug substance (DS) freezing enhances stability and manufacturing flexibility.
• Freezing and thawing (F/T) at manufacturing scale can impact DS quality due to cryo-concentration.
• Product-independent process parameters significantly influence F/T outcomes.

Purpose of the Study:

• To optimize methodologies for studying product-independent process parameters in bulk DS bottles.
• To establish reliable methods for monitoring temperature profiles and concentration gradients during F/T.
• To provide technical details for implementing these measurement techniques at manufacturing scale.

Main Methods:

• Development and optimization of temperature profile recording during DS freezing and thawing.
• Implementation of liquid sampling post-thaw to quantify concentration gradients.
• Utilizing camera-assisted inspection to identify last freeze and thaw points and actual thawing duration.

Main Results:

• Experimentally justified measurement positions for temperature recordings, including the last point to freeze.
• Successful implementation of camera-assisted inspection for thaw dynamics.
• Detailed technical descriptions of the optimized measurement setups.

Conclusions:

• Optimized methodologies enable better understanding and control of F/T processes for DS.
• Characterization of equipment and selection of appropriate measurement points are crucial for resource-conscious studies.
• These methods contribute to ensuring DS quality and process robustness during large-scale manufacturing.