title: Autologous platelet collection and storage to support thrombocytopenia in patients undergoing high-dose chemotherapy and circulating progenitor cell transplantation for high-risk breast cancer.
abstract: OBJECTIVE
  The use of circulating progenitor cell support following high-dose chemotherapy for malignancies decreases but does not entirely abolish platelet transfusion requirement. We investigated the feasibility of supporting the posttransplant thrombocytopenic phase exclusively with autologous platelets collected by apheresis and cryopreserved.
  
  
  METHODS
  25 patients underwent plateletpheresis during the platelet rebound occurring after high-dose cyclophosphamide. Autologous platelets were cryopreserved in 5% dimethylsulfoxide, thawed and transfused during the aplastic phase after the myeloablative regimen whenever clinically required.
  
  
  RESULTS
  A single plateletpheresis was carried out in all patients, allowing the harvest of a platelet concentrate with a mean value of 7.7 x 10(11) platelets. No significant procedure- or transfusion-related side effects were recorded. Mean platelet recovery after freezing and thawing was 63% and the mean number of platelet reinfused was 4.8 x 10(11); 23 of 25 patients were fully supported with autologous platelets.
  
  
  CONCLUSIONS
  Plateletpheresis performed in our selected group of patients was found to be a safe and effective procedure to collect large amounts of autologous platelets; the numbers obtained proved to be sufficient for the transfusion demand of almost all patients.
authors.affiliation: Servizio di Immunoematologia e Trasfusione, IRCCS Policlinico San Matteo, Italia.
authors.forename: L
authors.initials: L
authors.lastname: Torretta
authors.forename: C
authors.initials: C
authors.lastname: Perotti
authors.forename: P
authors.initials: P
authors.lastname: Pedrazzoli
authors.forename: G
authors.initials: G
authors.lastname: Dornini
authors.forename: G
authors.initials: G
authors.lastname: Viarengo
authors.forename: A
authors.initials: A
authors.lastname: Livraghi
authors.forename: P
authors.initials: P
authors.lastname: Noris
authors.forename: G A
authors.initials: GA
authors.lastname: Da Prada
authors.forename: C L
authors.initials: CL
authors.lastname: Balduini
authors.forename: G R
authors.initials: GR
authors.lastname: della Cuna
authors.forename: L
authors.initials: L
authors.lastname: Salvaneschi
mesh_terms: D000971:Antineoplastic Combined Chemotherapy Protocols / Q000009:adverse effects / Q000627:therapeutic use*; D001792:Blood Platelets; D001793:Blood Preservation; D001804:Blood Transfusion, Autologous; D001943:Breast Neoplasms / Q000097:blood / Q000188:drug therapy / Q000628:therapy*; D003131:Combined Modality Therapy; D003520:Cyclophosphamide / Q000008:administration & dosage / Q000009:adverse effects; D015251:Epirubicin / Q000008:administration & dosage / Q000009:adverse effects; D005260:Female; D016179:Granulocyte Colony-Stimulating Factor / Q000627:therapeutic use; D018380:Hematopoietic Stem Cell Transplantation / Q000009:adverse effects; D006801:Humans; D008558:Melphalan / Q000008:administration & dosage / Q000009:adverse effects; D008727:Methotrexate / Q000008:administration & dosage / Q000009:adverse effects; D017713:Platelet Transfusion; D013852:Thiotepa / Q000008:administration & dosage / Q000009:adverse effects; D013921:Thrombocytopenia / Q000139:chemically induced / Q000628:therapy*
chemical_list: D016179:Granulocyte Colony-Stimulating Factor; D015251:Epirubicin; D003520:Cyclophosphamide; D013852:Thiotepa; D008558:Melphalan; D008727:Methotrexate