Extended storage of granulocyte concentrates mobilized by G-CSF with/without dexamethasone and collected by bag...

Area of Science:

• Hematology
• Immunology
• Cellular Biology

Background:

• Granulocyte concentrates are crucial for treating infections in immunocompromised patients.
• Optimizing collection and storage methods is essential for maintaining granulocyte efficacy.
• Granulocyte-colony-stimulating factor (G-CSF) and dexamethasone (DEX) are used for granulocyte mobilization.

Purpose of the Study:

• To evaluate the extended storage of granulocytes mobilized by G-CSF with/without DEX.
• To assess the functional viability of these granulocytes after collection using a bag separation method.
• To measure cytokine levels during storage.

Main Methods:

• Healthy volunteers received G-CSF or G-CSF + DEX for granulocyte mobilization.
• Granulocytes were collected using a bag separation method.
• Phagocytosis, oxidative killing, viability, and cytokine levels (IL-1beta, IL-8, IL-6, TNF-alpha) were measured over 72 hours.

Main Results:

• Granulocyte numbers collected were higher with G-CSF + DEX compared to G-CSF alone.
• Phagocytosis, oxidative killing, and viability were well-maintained for up to 72 hours.
• Cytokine levels increased in a time-dependent manner during storage.

Conclusions:

• Granulocytes mobilized by G-CSF with/without DEX and collected by bag separation maintain function and viability for 72 hours.
• Extended storage of mobilized granulocytes is feasible, potentially improving therapeutic availability.
• Further research into cytokine dynamics during storage is warranted.