What are the risks and recommendations for intestinal samples?

2026-06-18

Answer:
Intestinal tissues contain abundant digestive enzymes and RNases, which can lead to rapid RNA degradation. In inflamed intestinal samples, epithelial cells often exhibit reduced transcriptional activity, resulting in lower median gene counts. This should be interpreted as a biological feature rather than a technical failure.

For frozen intestinal samples, nuclei isolation carries additional risks due to potential nuclear membrane damage. Proper preprocessing, including removal of luminal contents, blotting to remove excess liquid, and rapid freezing in liquid nitrogen, is critical. RNA quality assessment (RIN > 7) is required prior to downstream processing.

 

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