title: Maternal plasma or human serum albumin in wash buffer enhances enrichment and ex vivo expansion of human umbilical cord blood CD34+ cells.
abstract: Umbilical cord blood is a valuable source of haemopoietic stem/progenitor cells (HSC) for transplantation. This study explored the effect of maternal plasma/human serum albumin (HSA) in the purification and culture conditions of CD34+ cells derived from human umbilical cord blood. During CD34+ cell enrichment, including maternal plasma or HSA instead of fetal bovine serum (FBS) in the wash buffer, significantly increased the purity and the fold expansion of CD34+ cells. The increase in fold expansion of CD34+ cells was independent of CD34+ cell purity before expansion. With FBS, the mean fold expansion of CD34+ cells and total nucleated cells on day 7 was 9.7 +/- 5.5 and 39.7 +/- 13.7 respectively. The use of maternal plasma increased the mean fold expansion of CD34+ cells and total nucleated cells on day 7 to 28.2 +/- 6.7 and 71.5 +/- 15.4 respectively. When HSA was added to wash buffer, the mean fold expansion of CD34+ cells and total nucleated cells were 30.4 +/- 10.5 and 83.5 +/- 24.8 respectively. No statistical significance was found between using HSA and maternal plasma on total cell and CD34+ cell expansion. We propose that HSA in maternal plasma was responsible for the positive effect on CD34+ cell enrichment and expansion.
authors.affiliation: Department of Obstetrics and Gynaecology, The University of Hong Kong, Hong Kong.
authors.forename: Yvonne K
authors.initials: YK
authors.lastname: Kwok
authors.forename: Mary H Y
authors.initials: MH
authors.lastname: Tang
authors.forename: Helen K W
authors.initials: HK
authors.lastname: Law
authors.forename: Cora S
authors.initials: CS
authors.lastname: Ngai
authors.forename: Yu Lung
authors.initials: YL
authors.lastname: Lau
authors.forename: Elizabeth T
authors.initials: ET
authors.lastname: Lau
mesh_terms: D018952:Antigens, CD34; D001772:Blood Cell Count; D018929:Cell Culture Techniques; D049109:Cell Proliferation; D005260:Female; D005312:Fetal Blood; D005434:Flow Cytometry; D019650:Hematopoietic Stem Cell Mobilization / Q000379:methods*; D018380:Hematopoietic Stem Cell Transplantation; D006412:Hematopoietic Stem Cells / Q000166:cytology* / Q000276:immunology; D006801:Humans; D016130:Immunophenotyping; D010949:Plasma; D011247:Pregnancy; D012709:Serum Albumin / Q000008:administration & dosage*
chemical_list: D018952:Antigens, CD34; D012709:Serum Albumin