Method Optimization for Extracting High-Quality RNA From the Human Pancreas Tissue.

Area of Science:

• Molecular Biology
• Genomics
• Oncology

Background:

• Nucleic acid sequencing is crucial for understanding disease mechanisms.
• Degradation of nucleic acids, particularly RNA, during sample storage is a significant challenge.
• Pancreatic tissue yields low-quality RNA due to high ribonuclease (RNase) activity.

Purpose of the Study:

• To optimize methods for extracting high-quality RNA from human pancreatic tumor and normal tissues.
• To achieve an RNA Integrity Number (RIN) of 8 or higher for advanced genetic analysis.
• To identify key parameters affecting RNA yield and quality during sample processing and storage.

Main Methods:

• Evaluated RNA extraction protocols from paired tumor and normal pancreatic tissues (n=8).
• Assessed the impact of tissue lysis methods, RNAlater treatment, tissue weight, and storage time.
• Utilized RNA Integrity Number (RIN) to quantify RNA quality.

Main Results:

• Combined manual and mechanical tissue lysis yielded the highest RNA quantity.
• Sectioning tissues (<100 mg) and treating with RNAlater significantly enhanced RNA stability.
• Achieved high-quality RNA (RIN ≥ 8) from 100% of tumor and 75% of normal tissues.
• Extracted RNA remained stable after repeated freeze-thaw cycles.

Conclusions:

• Established optimized protocols for high-yield, high-quality RNA extraction from pancreatic tissues.
• Recommended specific sample handling and storage procedures (RNAlater, small tissue fragments) to preserve RNA integrity.
• These findings will improve genetic diagnosis and treatment strategies for pancreatic cancer patients.