Comparative study of the methods of extracting mesenchymal stem cells from cryopreserved Wharton's Jelly

Area of Science:

• Regenerative Medicine
• Stem Cell Biology
• Tissue Engineering

Background:

• Wharton's Jelly (WJ) is a rich source of mesenchymal stem cells (MSC).
• Cryopreservation of WJ tissue is common for long-term storage.
• Efficient extraction of viable MSCs from WJ is crucial for therapeutic applications.

Purpose of the Study:

• To compare three distinct methods for isolating mesenchymal stem cells (MSC) from cryopreserved Wharton's Jelly (WJ).
• To identify the optimal extraction technique for maximizing MSC viability and yield.
• To characterize the isolated WJ-MSC according to established international standards.

Main Methods:

• Comparison of enzymatic digestion, explant culture, and mechanical digestion for WJ-MSC extraction.
• Assessment of cell viability post-extraction for each method.
• Characterization of WJ-MSC using International Society for Cellular Therapy (ISCT) criteria, including cell surface marker expression (CD73, CD90, CD105) and hematopoietic lineage markers.

Main Results:

• Enzymatic digestion yielded significantly higher numbers of viable mesenchymal stem cells (MSC) compared to explant and mechanical digestion methods.
• The enzymatically-isolated WJ-MSC demonstrated characteristic MSC properties.
• Cells expressed key surface markers (CD73, CD90, CD105) and lacked hematopoietic markers, meeting ISCT criteria.

Conclusions:

• Enzymatic digestion is the most effective method for isolating viable mesenchymal stem cells (MSC) from cryopreserved Wharton's Jelly (WJ).
• This optimized extraction method ensures the quality and suitability of WJ-MSC for potential therapeutic and research applications.
• The findings provide a standardized protocol for WJ-MSC isolation, supporting advancements in regenerative medicine.