Silver Nanoparticles as a Novel Tissue Preservative: A Comparative Study with 10% Neutral Buffered Formalin

Area of Science:

• Biomaterials Science
• Molecular Biology
• Histopathology

Background:

• Traditional tissue preservation methods like formalin fixation present challenges including long-term tissue integrity compromise and potential ecotoxicity.
• Silver nanoparticles (AgNPs) possess antimicrobial properties, making them a candidate for novel tissue preservation applications.

Purpose of the Study:

• To evaluate silver nanoparticles (AgNPs) as a potential alternative tissue fixative to 10% neutral buffered formalin (NBF).
• To compare the efficacy of AgNPs and NBF in preserving molecular integrity (DNA, RNA, protein) and tissue morphology.

Main Methods:

• AgNPs were synthesized using a chemical reduction method.
• Murine heart, liver, and kidney tissues were preserved with either 10% NBF or AgNPs solution for 72 hours.
• Preservation was assessed by quantifying nucleic acid integrity, evaluating protein stability, and performing histopathological examinations.

Main Results:

• AgNPs solution maintained consistent DNA, RNA, and protein quality and quantity across tissues over 72 hours.
• Formalin treatment resulted in molecular degradation over the same period.
• 10% NBF demonstrated superior preservation of tissue morphology compared to AgNPs.

Conclusions:

• AgNPs exhibit excellent preservation of nucleic acids and intracellular proteins, indicating potential as a formalin alternative for molecular testing.
• Formalin fixation remains superior for preserving tissue morphology.
• Further research is needed to optimize AgNPs for improved morphological preservation in tissue samples.