title: Poly-L-lysine increases the ex vivo expansion and erythroid differentiation of human hematopoietic stem cells, as well as erythroid enucleation efficacy.
abstract: Hematopoietic stem cells (HSCs) are continuously stimulated by physical interactions with bone marrow or umbilical cord niches as well as by chemical factors found within these niches. The niche can be mimicked by modification of the cytokine composition, elasticity, topography, and/or charge. This work employed cell culture plates coated with several concentrations of poly-L-lysine (PLL), a positively charged synthetic amino-acid chain. Culture substrates that employed relatively high initial coating concentrations of PLL significantly increased the total number of HSCs during ex vivo expansion of CD34(+) cells, as well as erythroid differentiation. Furthermore, the 0.01% PLL substrate stimulated enucleation of erythroid cells, leaving behind a number of extruded nuclei at the bottom of the culture plate, followed by an increase in the number of erythrocytes. Thus, PLL will likely prove useful to enhance the expansion of HSCs and erythroid cells, in addition to the generation of red blood cells.
authors.affiliation: 1 Department of Biomedical Science, CHA University , Gyeonggi-do, Korea.
authors.forename: Kwang-Sook
authors.initials: KS
authors.lastname: Park
authors.forename: Jongchan
authors.initials: J
authors.lastname: Ahn
authors.forename: Ji Yeon
authors.initials: JY
authors.lastname: Kim
authors.forename: Hansoo
authors.initials: H
authors.lastname: Park
authors.forename: Hyun Ok
authors.initials: HO
authors.lastname: Kim
authors.forename: Soo-Hong
authors.initials: SH
authors.lastname: Lee
mesh_terms: D002454:Cell Differentiation / Q000187:drug effects*; D049109:Cell Proliferation / Q000187:drug effects; D004912:Erythrocytes / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D041905:Erythroid Cells / Q000166:cytology* / Q000187:drug effects / Q000378:metabolism; D006412:Hematopoietic Stem Cells / Q000166:cytology* / Q000187:drug effects / Q000378:metabolism; D006801:Humans; D039902:Multipotent Stem Cells / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D056951:Photoelectron Spectroscopy; D011107:Polylysine / Q000494:pharmacology*; D016133:Polymerase Chain Reaction
chemical_list: D011107:Polylysine