Journal of veterinary internal medicine / American College of Veterinary Internal Medicine, 2008; 22 (1) doi:10.1111/j.1939-1676.2007.0016.x
Affiliation: Fred Hutchinson Cancer Research Center, United States
Abstract: BACKGROUND: Preclinical studies of peripheral blood mononuclear cell (PBMC) transplantation conducted in a well-established canine hematopoietic cell transplantation (HCT) model have been successfully translated to human patients over the past 5 decades.
OBJECTIVE: We retrospectively investigated the safety and feasibility of PBMC apheresis in the canine model of HCT by analyzing apheresis parameters, cell yields, and the impacts of donor-related and apheresis-related variables on collection yields and donor stability.
ANIMALS: One hundred and twenty dogs that underwent PBMC aphereses were evaluated.
METHODS: Aphereses were performed with a COBE Spectra blood separator and a central dual-lumen catheter, with or without recombinant canine granulocyte colony-stimulating factor (rcG-CSF) stem cell mobilization.
RESULTS: Aphereses from dogs not given rcG-CSF yielded an average volume of 280 +/- 42 mL containing an average of 15,086 +/- 9,834 leukocytes/mL. Aphereses from dogs given rcG-CSF yielded an average volume of 261 +/- 55 mL containing an average of 39,711 +/- 24,488 leukocytes/mL. Higher pre-apheresis white blood cell (WBC) counts correlated with higher apheresis WBC yields (R=0.50, P<.0001). The correlations of collection time, inlet volume, and collection flow rate on WBC yields were statistically significant but only weak to moderate in magnitude (R=0.34, P=.0001; R=0.38, P=.0006; R=0.26, P=.002, respectively) as were the correlations of collection time and inlet volume on collection volumes (R=0.30, P=.002; R=0.42, P<.0001, respectively). All dogs recovered promptly after PBMC aphereses and catheter removal, without complications.
CONCLUSIONS AND CLINICAL IMPORTANCE: These data may be useful for translating PBMC apheresis technology to the field of veterinary oncology for the treatment of dogs with hematologic malignancies.
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