What factors commonly lead to RNA degradation?
2026-06-23
Answer:
Several factors may increase the risk of RNA degradation:
Improper sample preservation. Examples include:
- Fresh tissue stored at 4°C for extended periods (>2 hours)
- Repeated freeze-thaw cycles
- Long-term storage at −20°C
Tissue-specific pathology. RNA degradation is more common in:
- Necrotic tumors
- Calcified tissues
- Atherosclerotic plaques
- Post-treatment tumor samples
Improper embedding conditions. RNA stability may be affected by:
- Excessively high OCT embedding temperatures
- Failure to perform rapid low-temperature embedding (such as dry ice-assisted embedding)
Incompatible fixation methods. Fixatives such as paraformaldehyde (PFA) and formalin may cause RNA crosslinking and degradation and are therefore incompatible with the current SeekSpace workflow.
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