Extensive studies on perfusion method plus intra-bone marrow-bone marrow transplantation using cynomolgus monkeys

Area of Science:

• Regenerative Medicine
• Hematology
• Primate Research

Background:

• Perfusion methods offer advantages for bone marrow cell (BMCs) collection, including reduced T cell contamination and enriched stromal cells supporting hematopoiesis.
• Prior to human application, the safety of this novel BMCs collection technique requires rigorous validation in a preclinical model.

Purpose of the Study:

• To evaluate the safety and feasibility of a perfusion-based bone marrow cell collection method.
• To assess the technical safety of intra-bone marrow (IBM) injection of BMCs, termed IBM-bone marrow transplantation, in non-human primates.

Main Methods:

• The perfusion method was applied to the long bones (humerus, femur) and iliac bones of over 100 cynomolgus monkeys.
• More than 150 trials were conducted to assess the safety of the perfusion collection technique.
• The safety of IBM-bone marrow transplantation was evaluated in 30 monkeys.

Main Results:

• No accidental deaths occurred during over 150 trials using the perfusion method in cynomolgus monkeys.
• The perfusion method demonstrated technical safety for collecting bone marrow cells.
• The intra-bone marrow injection technique was also confirmed as technically safe in the studied subjects.

Conclusions:

• The perfusion method for bone marrow cell collection is safe and effective in cynomolgus monkeys.
• Intra-bone marrow transplantation using this method is technically safe, supporting its potential for human application.
• These findings provide a crucial preclinical safety assessment for advancing bone marrow cell therapies.