Microbiological control in stem cell banks: approaches to standardisation

Area of Science:

• Regenerative Medicine
• Microbiology
• Cell Biology

Background:

• Cellular therapies offer significant treatment potential for various diseases.
• Stem cell banking requires stringent quality control to ensure safety and traceability.
• Preventing contamination is paramount for the efficacy of cell-based treatments.

Purpose of the Study:

• To outline essential safety measures for stem cell banks.
• To highlight methods for detecting microbial and viral contaminants.
• To ensure the quality and safety of human cell cultures for transplantation.

Main Methods:

• Screening donors for infectious agents like HIV, HBV, HCV, and HTLV.
• Utilizing nucleic acid amplification testing (NAAT) to shorten viral detection windows.
• Performing European pharmacopoeia tests for bacteria, fungi, yeast, and mycoplasma.
• Conducting routine environmental microbiological monitoring of cleanrooms.
• Testing for prions and adventitious viruses in cell lines and animal-derived products.

Main Results:

• NAAT effectively reduces the window period for viral detection.
• Routine screening identifies potential bacterial, fungal, and mycoplasma contamination.
• Environmental monitoring detects and controls laboratory-associated contaminants.
• Consideration of animal-derived product risks (e.g., bovine serum) is essential.
• Comprehensive testing ensures the safety of stem cell products.

Conclusions:

• Robust screening protocols are vital for stem cell safety.
• Integrated testing strategies, including NAAT and environmental monitoring, are necessary.
• Adherence to good practices guarantees the quality and safety of stem cell cultures for transplantation.