Three Methods to Purify Leukocytes and RNA Quality Assessment

Area of Science:

• Immunology and Translational Medicine
• Cellular Biology and Genomics

Background:

• Leukocytes are crucial for innate and adaptive immunity, and vital for translational medicine, precision medicine, and cell therapy.
• High-quality RNA isolation from leukocytes is essential for downstream research, but the process is sensitive to various factors.
• Standardized methods are needed to ensure consistent and reliable leukocyte isolation for research applications.

Purpose of the Study:

• To evaluate and compare three distinct methods for leukocyte separation from whole blood.
• To assess the RNA quality obtained from each leukocyte isolation method.
• To identify the most suitable method for biobanks and downstream research applications.

Main Methods:

• Leukocyte separation using lymphocyte separation medium (LSM).
• Leukocyte separation using an optimized LSM protocol.
• Leukocyte separation using a red blood cell lysis buffer (RBC lysis).
• RNA extraction and subsequent quality assessment following each separation method.

Main Results:

• All three tested methods successfully purified leukocytes, yielding RNA that met basic requirements for downstream studies.
• The RBC lysis method demonstrated particular advantages in terms of procedural simplicity.
• RNA quality from donated samples was found to be suitable using the RBC lysis method.

Conclusions:

• The red blood cell lysis buffer (RBC lysis) method is recommended for biobanks due to its simplicity and the adequate RNA quality it provides.
• This method supports reliable downstream research in fields like translational and precision medicine.
• Standardization of leukocyte isolation is key for consistent results in cell-based research and therapies.