Endothelial progenitor cells promote efficient ex vivo expansion of cord blood-derived hematopoietic stem/progenitor cells
Autor: | Limin Liu, Qi Qu, Xiaojin Wu, Guanghua Chen, Depei Wu, Yang Xu |
---|---|
Rok vydání: | 2015 |
Předmět: |
0301 basic medicine
Cancer Research Immunology CD34 Cell Culture Techniques Antigens CD34 Cord Blood Stem Cell Transplantation Mice SCID Biology 03 medical and health sciences Mice Mice Inbred NOD Pregnancy Human Umbilical Vein Endothelial Cells Immunology and Allergy Animals Humans Progenitor cell Genetics (clinical) Cells Cultured Cell Proliferation Endothelial Progenitor Cells Transplantation Hematopoietic Stem Cell Transplantation Infant Newborn Cell Biology Fetal Blood Hematopoietic Stem Cells Coculture Techniques Endothelial stem cell Haematopoiesis 030104 developmental biology Oncology Cord blood Cancer research Cytokine secretion Female Stem cell |
Zdroj: | Cytotherapy. 18(3) |
ISSN: | 1477-2566 |
Popis: | Background aims Cord blood (CB) hematopoietic stem cell transplantation has often been limited by the scarcity of stem cells. Therefore, the number of CB hematopoietic stem/progenitor cells (HSPCs) should be increased while maintaining the stem cell characteristics. Methods We designed an ex vivo culture system using endothelial progenitor cells (EPCs) as stroma to determine the capacity of expanding CB-HSPCs in a defined medium, the effect on engraftment of the expanded cells in a mouse model and the underlying mechanism. Results After 7 days of culture, compared with those cultured with cytokines alone (3.25 ± 0.59), CD34+ cells under contact and non-contact co-culture with EPCs were expanded by 5.38 ± 0.61 ( P = 0.003) and 4.06 ± 0.43 ( P = 0.025)–fold, respectively. Direct cell-to-cell contact co-culture with EPCs resulted in more primitive CD34+ CD38− cells than stroma-free culture (156.17 ± 21.32 versus 79.12 ± 19.77–fold; P = 0.010). Comparable engraftment of day 7 co-cultured HSPCs with respect to HSPCs at day 0 in nonobese diabetic-severe combined immunodeficiency disease (NOD/SCID) mice was measured as a percentage of chimerism (13.3% ± 11.0% versus 16.0% ± 14.3%; P = 0.750). EPCs highly expressed interleukin 6 ( IL6 ) and angiopoietin 1 ( ANGPT1 ), the hematopoietic- related cytokines. A higher transcriptional level of WNT5A genes in EPCs and co-cultured HSPCs suggests that the activation of Wnt signaling pathway may play a role in HSPCs' expansion ex vivo . Discussion These data demonstrated that EPCs improve the CD34+ population but do not compromise the repopulating efficacy of the amplified HSPCs, possibly via cytokine secretion and Wnt signaling pathway activation. |
Databáze: | OpenAIRE |
Externí odkaz: |