title: [A two-phase culture system for megakaryocyte differentiation of human mobilized peripheral blood CD34+ cells].
abstract: In our study, a two-phase culture system was developed to acquire large amount of CD41+ and polyploidy cells. Human mobilized peripheral blood CD34+ (PB CD34+) cells were first cultured in expansion medium (Cocktail or CC100 medium) for 3,4,5 or 6 days, and then cultured in megakaryocytic differentiation medium containing TPO and SCF for additional 7, 8 or 9 days. Cell expansion, morphology, CD41+ cell percentage and DNA content were investigated to evaluate the protocol. The result showed that more CD41+ and polyploidy cells could be obtained following the two-phase culture with Cocktail medium than with CC100. Moreover, with 3 days expansion in Cocktail medium plus 7 days in differentiation medium, the initial CD 34+ cells obtained 16-fold expansion of CD41+ cells and 3-fold expansion of polyploidy cells, such obtained level being significantly higher than that of culturing cells with only one step in TPO or TPO+SCF. We conclude that with the two-phase culture system, PB CD34+ cells can expand and differentiate to more CD41+ and polyploidy cells than those cultured only in accordance to the one-stage culture protocol, so a new and highly efficient megakaryocyte differentiation model for megakaryocyte and platelet related researches is provided already.
authors.affiliation: Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Luo
authors.forename: Guanbin
authors.initials: G
authors.lastname: Song
authors.forename: Chengyu
authors.initials: C
authors.lastname: Zou
mesh_terms: D018952:Antigens, CD34 / Q000097:blood*; D001773:Blood Cells / Q000166:cytology*; D018929:Cell Culture Techniques / Q000379:methods; D002454:Cell Differentiation / Q000502:physiology*; D003115:Colony-Stimulating Factors / Q000502:physiology; D019650:Hematopoietic Stem Cell Mobilization / Q000379:methods*; D006801:Humans; D008533:Megakaryocytes / Q000166:cytology*; D013234:Stem Cells / Q000166:cytology
chemical_list: D018952:Antigens, CD34; D003115:Colony-Stimulating Factors