Structural and Functional Equivalency Between Lyopreserved and Cryopreserved Chorions with Viable Cells

Area of Science:

• Regenerative Medicine
• Biomaterials Science
• Wound Healing Research

Background:

• Cryopreserved amnion and trophoblast-free chorion demonstrate efficacy in chronic wound treatment.
• Lyopreservation offers a novel method for preserving viable cells in placental tissues.
• The immunogenicity of chorionic membrane requires further investigation.

Purpose of the Study:

• To lyopreserve trophoblast-free chorionic membrane (VLCM) and assess its properties.
• To compare VLCM with viable cryopreserved chorionic membrane (VCCM).
• To evaluate the immunogenicity, anti-inflammatory, proangiogenic, and antifibrotic potential of chorion.

Main Methods:

• Immunogenicity tested via mixed lymphocyte reaction, LPS challenge, and mouse subcutaneous implantation.
• VLCM structural integrity, growth factors, and cell viability assessed.
• Functional assays included TNF-α inhibition, endothelial tubule formation, and rabbit adhesion model.

Main Results:

• Trophoblast-free chorionic membrane (CM) demonstrated non-immunogenicity.
• VLCM preserved tissue architecture, growth factors, and cell viability, mirroring VCCM.
• VLCM exhibited retained anti-inflammatory and angiogenic properties and prevented adhesions in vivo.

Conclusions:

• Lyopreserved chorionic membrane (VLCM) maintains structural and functional equivalence to viable cryopreserved chorionic membrane (VCCM).
• VLCM retains essential components like extracellular matrix, growth factors, and viable cells.
• VLCM exhibits significant anti-inflammatory, proangiogenic, and antifibrotic characteristics, supporting its therapeutic potential.