Microprocessor-controlled freezing device for cryopreservation of cell samples.

Area of Science:

• Biotechnology
• Cell Biology
• Cryobiology

Background:

• Cryopreservation of blood mononuclear cells is crucial for various research and clinical applications.
• Maintaining high cell viability post-thaw is essential for effective downstream use.
• Existing methods may lack precision, automation, or cost-effectiveness.

Purpose of the Study:

• To develop and evaluate a novel, microcontroller-operated device for automated cryopreservation of blood mononuclear cells.
• To achieve precise temperature control during the freezing process for optimal cell preservation.
• To assess the performance, efficiency, and cost-effectiveness of the developed device.

Main Methods:

• Development of a microcontroller-operated freezing device with automated, unattended operation.
• Implementation of a precise cooling protocol from room temperature to -100°C.
• Performance evaluation using physiological solution and cell suspension, with temperature accuracy monitored.
• Assessment of cell viability post-cryopreservation and measurement of liquid nitrogen consumption.

Main Results:

• The device achieved precise temperature control of cell suspension with accuracy better than +/- 0.1% across the entire temperature range.
• High cell viability of 95% was recovered from frozen blood mononuclear cell samples.
• Liquid nitrogen consumption was efficient at 1.51 per cryopreservation cycle.
• The device demonstrated a compact design, ease of operation, and availability of manual and semi-automatic modes.

Conclusions:

• The developed automated freezing device provides a highly accurate and efficient method for cryopreserving blood mononuclear cells.
• The system ensures excellent cell viability and low resource consumption, making it suitable for research and clinical settings.
• Its low cost, compact design, and user-friendly interface enhance its applicability in diverse laboratory environments.