[Comparative studies on different cryopreservation protocols of human amniotic fluid-derived mesenchymal stem cells]

Area of Science:

• Stem Cell Biology
• Regenerative Medicine
• Biopreservation

Background:

• Human amniotic fluid-derived mesenchymal stem cells (HAFMSCs) offer therapeutic potential.
• Effective cryopreservation is crucial for maintaining HAFMSC viability and function for research and clinical use.

Purpose of the Study:

• To isolate and culture HAFMSCs.
• To determine an optimal cryopreservation protocol for HAFMSCs.
• To evaluate the bio-characteristics and multi-potential of cryopreserved HAFMSCs.

Main Methods:

• HAFMSCs isolated using an improved two-step method.
• Cells cryopreserved for 12 weeks with varying cryoprotectant compositions (DMEM, FBS, DMSO).
• Assessed cell viability (MTT), proliferation (growth curves), surface markers (flow cytometry), and differentiation potential (adipogenic, osteogenic).

Main Results:

• Optimal cryoprotectant formula identified as 50% DMEM, 40% FBS, 10% DMSO.
• Cryopreserved HAFMSCs exhibited rapid proliferation and maintained characteristic surface markers (CD29, CD44, CD73, CD90 positive; CD34, CD45 negative).
• Adipogenic and osteogenic differentiation potentials remained unchanged post-cryopreservation, with no significant alteration in Oct-4 and Nanog mRNA levels.

Conclusions:

• HAFMSCs demonstrate robust proliferation and multi-potential in vitro.
• Cryopreservation for 12 weeks using the optimized protocol preserves HAFMSC viability, bio-characteristics, and differentiation capacity.
• The developed cryopreservation protocol is suitable for fundamental research and clinical applications.