Collection of Peripheral Blood CD34+ Progenitor Cells from Healthy Dogs and Dogs Diagnosed with Lymphoproliferative Diseases Using a Baxter-Fenwal CS-3000 Plus Blood Cell Separator

Background: Canine peripheral blood mononuclear cell (PBMC) apheresis using a Baxter-Fenwal CS-3000 Plus automated blood cell separator has not been reported. Objective: To determine the feasibility and safety of using a CS-3000 Plus blood cell separator with a small volume separation container holder (SVSCH) and small volume collection chamber (SVCC) to harvest canine PBMCs from dogs weighing <50 kg. Animals: Eight healthy mongrel dogs and 11 client-owned dogs in clinical remission for lymphoproliferative diseases (LPD). Methods: In this prospective study, aphereses were performed using a Baxter-Fenwal CS-3000 Plus blood cell separator, with or without recombinant human granulocyte colony-stimulating factor (rhG-CSF) treatment. Results: Aphereses from 6 healthy dogs given rhG-CSF yielded an average of 1.1 x 10(7) +/- 8.2 x 10(6) CD34+ cells/kg. Aphereses from LPD dogs given rhG-CSF yielded an average of 5.4 x 10(6) +/- 3.25 x 10(6) CD34+ cells/kg (P = .17). Higher hematocrit in both groups of dogs receiving rhG-CSF correlated with an increased number of CD34+ cells/kg harvested (healthy, P = .04; LPD, P = .05). Apheresis was well tolerated by all dogs. Conclusions and Clinical Importance: Canine PBMC apheresis using the Baxter-Fenwal CS-3000 Plus cell separator with an SVSCH and SVCC is a feasible and safe option for harvesting an adequate number of CD34+ peripheral blood progenitor cells from dogs weighing >= 17 kg for hematopoietic cell transplantation.