[Effects of freeze-drying bovine pericardium using a combination of polyethylene glycol and trehalose].
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
; 41(2): 368-375, 2024 Apr 25.
Article
in Zh
| MEDLINE
| ID: mdl-38686419
ABSTRACT
The freeze-drying is a technology that preserves biological samples in a dry state, which is beneficial for storage, transportation, and cost saving. In this study, the bovine pericardium was treated with a freeze-drying protectant composed of polyethylene glycol (PEG) and trehalose (Tre), and then freeze-dried. The results demonstrated that the mechanical properties of the pericardium treated with PEG + 10% w/v Tre were superior to those of the pericardium fixed with glutaraldehyde (GA). The wet state water content of the rehydrated pericardium, determined using the Karl Fischer method, was (74.81 ± 1.44)%, which was comparable to that of the GA-fixed pericardium. The dry state water content was significantly reduced to (8.64 ± 1.52)%, indicating effective dehydration during the freeze-drying process. Differential scanning calorimetry (DSC) testing revealed that the thermal shrinkage temperature of the pericardium was (84.96 ± 0.49) â, higher than that of the GA-fixed pericardium (83.14 ± 0.11) â, indicating greater thermal stability. Fourier transform infrared spectroscopy (FTIR) results showed no damage to the protein structure during freeze-drying. Hematoxylin and eosin (HE) staining demonstrated that the freeze-drying process reduced pore formation, prevented ice crystal growth, and resulted in a tighter arrangement of tissue fibers. The frozen-dried bovine pericardium was subjected to tests for cell viability and hemolysis rate. The results revealed a cell proliferation rate of (77.87 ± 0.49)%, corresponding to a toxicity grade of 1. Additionally, the hemolysis rate was (0.17 ± 0.02)%, which is below the standard of 5%. These findings indicated that the frozen-dried bovine pericardium exhibited satisfactory performance in terms of cytotoxicity and hemolysis, thus meeting the relevant standards. In summary, the performance of the bovine pericardium treated with PEG + 10% w/v Tre and subjected to freeze-drying could meet the required standards.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Pericardium
/
Polyethylene Glycols
/
Trehalose
/
Freeze Drying
Limits:
Animals
Language:
Zh
Journal:
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Journal subject:
ENGENHARIA BIOMEDICA
Year:
2024
Document type:
Article