Human Amniotic Membrane Procurement Protocol and Evaluation of a Simplified Alkaline Decellularization Method

Area of Science:

• Regenerative Medicine
• Biomaterials Science
• Tissue Engineering

Background:

• Amniotic membrane (AM) is valuable in regenerative medicine due to its biocompatibility and extracellular matrix (ECM).
• Effective decellularization is crucial to reduce immunogenicity while maintaining tissue architecture.
• Standardizing AM processing and evaluating decellularization methods are key for clinical translation.

Purpose of the Study:

• To compare a simplified alkaline decellularization protocol with a conventional detergent-alkaline method for human AM.
• To assess the practicality, histological integrity, and collagen preservation of each method.
• To determine the optimal method for AM processing based on efficiency and structural integrity.

Main Methods:

• Human AM was obtained and processed using either a simplified alkaline or a conventional detergent-alkaline method.
• Histological analysis included hematoxylin eosin and Masson's trichrome staining.
• Quantification of nuclear content and collagen integrity was performed.

Main Results:

• The alkaline method achieved significant nuclear clearance but showed partial persistence of cellular structures.
• The detergent method resulted in complete morphological decellularization with slightly higher residual nuclear signal.
• Detergent-based processing preserved collagen intensity closer to native tissue compared to the alkaline method (p < 0.001).

Conclusions:

• The simplified alkaline method is a practical, cost-effective, and time-efficient approach for AM decellularization.
• This method, however, may cause partial alteration of the ECM.
• Detergent-based methods are preferable when optimal structural preservation of AM is required for regenerative medicine.