PMID- 25231002 OWN - NLM STAT- MEDLINE DCOM- 20150223 LR - 20211021 IS - 1365-2184 (Electronic) IS - 0960-7722 (Print) IS - 0960-7722 (Linking) VI - 47 IP - 6 DP - 2014 Dec TI - CD29 of human umbilical cord mesenchymal stem cells is required for expansion of CD34(+) cells. PG - 596-603 LID - 10.1111/cpr.12130 [doi] AB - OBJECTIVES: Human umbilical cord mesenchymal stem cells (hUCMSCs) play a critical role in expanding haematopoietic stem cells (HSCs) by providing the essential microenvironment for haematopoiesis. In this study, we sought to investigate whether CD29 of hUCMSCs would play a key role in the ability of hUCMSCs to help expand HSCs in vivo and in vitro. MATERIAL AND METHODS: To investigate whether CD29 of hUCMSCs would play a key role for the ability of hUCMSCs to expand HSCs, soluble anti-CD29 antibody was added to co-cultures of hUCMSCs and cord blood (CB) CD34(+) cells. It significantly blocked expansion of CB CD34(+) cells induced by hUCMSCs. Using CD29-deficient hUCMSCs models, long-term culture-initiating cell and non-obese diabetic/severe combined immunodeficient disease mouse repopulating cell assay, revealed that CB CD34(+) cells co-cultured with CD29-deficient hUCMSCs only retained the capacity of multipotent differentiation for 5 weeks at the most. RESULTS: Soluble anti-CD29 antibody significantly blocked expansion of CB CD34(+) cells induced by hUCMSCs. CB CD34(+) cells co-cultured with CD29-deficient hUCMSCs only retained the capacity of multipotent differentiation for 5 weeks at the most. CONCLUSIONS: CB CD34(+) cells co-cultured with CD29-deficient hUCMSCs gave rise to all major haematopoietic lineages, but failed to engraft long term. CI - (c) 2014 John Wiley & Sons Ltd. FAU - Yang, Y AU - Yang Y AD - Department of Medical Genetics, School of Basic Medical Sciences, Peking University, Beijing, 100191, China. FAU - Hu, M AU - Hu M FAU - Zhang, Y AU - Zhang Y FAU - Li, H AU - Li H FAU - Miao, Z AU - Miao Z LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140918 PL - England TA - Cell Prolif JT - Cell proliferation JID - 9105195 RN - 0 (Antigens, CD34) RN - 0 (Integrin beta1) RN - 0 (RNA, Small Interfering) SB - IM MH - Animals MH - Antigens, CD34/*metabolism MH - Cells, Cultured MH - Coculture Techniques MH - Fetal Blood/*cytology MH - Hematopoiesis MH - Humans MH - Integrin beta1/chemistry/genetics/*metabolism MH - Mesenchymal Stem Cells/cytology/*metabolism MH - Mice MH - RNA Interference MH - RNA, Small Interfering/metabolism MH - Transplantation, Heterologous PMC - PMC6495839 EDAT- 2014/09/19 06:00 MHDA- 2015/02/24 06:00 PMCR- 2014/09/18 CRDT- 2014/09/19 06:00 PHST- 2014/05/28 00:00 [received] PHST- 2014/06/27 00:00 [accepted] PHST- 2014/09/19 06:00 [entrez] PHST- 2014/09/19 06:00 [pubmed] PHST- 2015/02/24 06:00 [medline] PHST- 2014/09/18 00:00 [pmc-release] AID - CPR12130 [pii] AID - 10.1111/cpr.12130 [doi] PST - ppublish SO - Cell Prolif. 2014 Dec;47(6):596-603. doi: 10.1111/cpr.12130. Epub 2014 Sep 18.