Improving White Blood Cell Collection From Healthy Donors

Summary

Background: \- White blood cells called granulocytes help the body fight infection. People who have had chemotherapy or bone marrow transplants may have very low numbers of these cells. Transfusions of these cells can help improve the body's ability to fight infection. However, most of the cells are located in the bone marrow or spleen, and are hard to collect from healthy donors. Two drugs, filgrastim and dexamethasone, can help move the cells to the bloodstream to be collected by apheresis. Researchers want to study the best ways to collect these white blood cells. They also want to monitor the effects of the injections and donations on the volunteer donors. Objectives: \- To improve the amount and quality of granulocytes (white blood cells) collected by apheresis for donation. Eligibility: \- Healthy volunteers between 18 and 75 years of age. Design: * Participants will be screened with a physical exam and medical history. Initial blood tests will be done to check for eligibility. * Participants will donate granulocytes by apheresis a maximum of 12 times in 1 year. Donations will not usually be requested more often than every 4 weeks. Donors will be allowed to decline participation at any time. * Participants will have one injection of filgrastim 12 to 24 hours before donation. They will also have two tablets of dexamethasone 12 hours before donation. * White blood cells will be collected through apheresis. The apheresis will last about 2 hours. * Participants will be eligible to donate until they reach their 76th birthday.

Timeline

Start

2012-12-31

Primary completion

2032-01-01

Completion

2032-01-01

Publications

• Background Wingard JR, Carter SL, Walsh TJ, Kurtzberg J, Small TN, Baden LR, Gersten ID, Mendizabal AM, Leather HL, Confer DL, Maziarz RT, Stadtmauer EA, Bolanos-Meade J, Brown J, Dipersio JF, Boeckh M, Marr KA; Blood and Marrow Transplant Clinical Trials Network. Randomized, double-blind trial of fluconazole versus voriconazole for prevention of invasive fungal infection after allogeneic hematopoietic cell transplantation. Blood. 2010 Dec 9;116(24):5111-8. doi: 10.1182/blood-2010-02-268151. Epub 2010 Sep 8.
• Background Baddley JW, Andes DR, Marr KA, Kontoyiannis DP, Alexander BD, Kauffman CA, Oster RA, Anaissie EJ, Walsh TJ, Schuster MG, Wingard JR, Patterson TF, Ito JI, Williams OD, Chiller T, Pappas PG. Factors associated with mortality in transplant patients with invasive aspergillosis. Clin Infect Dis. 2010 Jun 15;50(12):1559-67. doi: 10.1086/652768.
• Background Stroncek DF, Yau YY, Oblitas J, Leitman SF. Administration of G--CSF plus dexamethasone produces greater granulocyte concentrate yields while causing no more donor toxicity than G--CSF alone. Transfusion. 2001 Aug;41(8):1037-44. doi: 10.1046/j.1537-2995.2001.41081037.x.

Drugs

Indications

No indication recorded.