title: Correlation between survival and number of mobilized CD34+ cells in patients with multiple myeloma or Waldenström macroglobulinemia.
abstract: High-dose chemotherapy followed by autologous stem cell transplantation is the established treatment for symptomatic multiple myeloma (MM) or Waldenström macroglobulinemia (WM). We retrospectively analyzed the impact of mobilized CD34+ cell number on clinical outcomes in patients with MM or WM who underwent autologous stem cell transplantation in our hospital from 1997 to 2007. A total of 39 patients were identified. All patients received peripheral stem cell support after a conditioning regimen. We defined patients with collection of a large number (≥ 8 × 10(6)/kg) of CD34+ cells as super mobilizers (SM), and all others as normal mobilizers (NM). Although hematological engraftment was earlier in the SM group, overall survival did not differ significantly between groups (P = 0.392). Likewise, no significant differences were seen in progression-free survival (P = 0.201) or survival after relapse (P = 0.330). In conclusion, our retrospective study could not find any correlation between survival and number of mobilized CD34+ cells, in contrast to previously reported results.
authors.affiliation: Hematology Division, Tokyo Metropolitan Cancer and Infectious Disease Center, Komagome Hospital, 3-18-22 Honkomagome, Bunkyo-ku, Tokyo 113-8677, Japan.
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Kakihana
authors.forename: Kazuteru
authors.initials: K
authors.lastname: Ohashi
authors.forename: Hideki
authors.initials: H
authors.lastname: Akiyama
authors.forename: Hisashi
authors.initials: H
authors.lastname: Sakamaki
mesh_terms: D000328:Adult; D000368:Aged; D018952:Antigens, CD34 / Q000276:immunology / Q000378:metabolism*; D000970:Antineoplastic Agents / Q000627:therapeutic use; D001792:Blood Platelets / Q000276:immunology; D003131:Combined Modality Therapy; D018450:Disease Progression; D005260:Female; D019650:Hematopoietic Stem Cell Mobilization / Q000379:methods*; D018380:Hematopoietic Stem Cell Transplantation / Q000379:methods*; D006412:Hematopoietic Stem Cells / Q000166:cytology / Q000276:immunology / Q000378:metabolism*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009101:Multiple Myeloma / Q000097:blood / Q000188:drug therapy / Q000378:metabolism* / Q000601:surgery; D009504:Neutrophils / Q000276:immunology; D012189:Retrospective Studies; D014182:Transplantation, Autologous; D008258:Waldenstrom Macroglobulinemia / Q000097:blood / Q000188:drug therapy / Q000378:metabolism* / Q000601:surgery
chemical_list: D018952:Antigens, CD34; D000970:Antineoplastic Agents