Resolving the bone - optimizing decalcification in spatial transcriptomics and molecular pathology

Area of Science:

• Histology
• Molecular Biology
• Biochemistry

Background:

• Bone tissue's dense matrix and calcification challenge spatial transcriptomics and molecular pathology.
• Conventional decalcification methods often degrade essential biomolecules (nucleic acids, proteins).
• This degradation complicates molecular assays like PCR, sequencing, and immunohistochemistry.

Purpose of the Study:

• To review traditional and modern decalcification techniques for bone and calcified tissues.
• To highlight the importance of optimizing decalcification for spatial transcriptomics and molecular pathology.
• To provide recommendations for molecularly robust tissue processing.

Main Methods:

• Exploration of traditional decalcification agents (e.g., formic acid, hydrochloric acid).
• Investigation of modern decalcification approaches.
• Analysis of impacts on nucleic acid and protein integrity.
• Assessment of tissue architecture preservation.

Main Results:

• Common decalcifying agents can lead to varying degrees of biomolecule degradation.
• Optimized protocols are essential for maintaining molecular integrity in bone samples.
• Advances in spatial transcriptomics necessitate improved decalcification strategies.

Conclusions:

• Effective decalcification is key to unlocking the potential of spatial transcriptomics in bone research.
• Methodological refinements can enhance biomolecule preservation for molecular pathology.
• Further research into novel decalcification agents and protocols is warranted.