title: Human stromal (mesenchymal) stem cells from bone marrow, adipose tissue and skin exhibit differences in molecular phenotype and differentiation potential.
abstract: Human stromal (mesenchymal) stem cells (hMSCs) are multipotent stem cells with ability to differentiate into mesoderm-type cells e.g. osteoblasts and adipocytes and thus they are being introduced into clinical trials for tissue regeneration. Traditionally, hMSCs have been isolated from bone marrow, but the number of cells obtained is limited. Here, we compared the MSC-like cell populations, obtained from alternative sources for MSC: adipose tissue and skin, with the standard phenotype of human bone marrow MSC (BM-MSCs). MSC from human adipose tissue (human adipose stromal cells (hATSCs)) and human skin (human adult skin stromal cells, (hASSCs) and human new-born skin stromal cells (hNSSCs)) grew readily in culture and the growth rate was highest in hNSSCs and lowest in hATSCs. Compared with phenotype of hBM-MSC, all cell populations were CD34(-), CD45(-), CD14(-), CD31(-), HLA-DR(-), CD13(+), CD29(+), CD44(+), CD73(+), CD90(+),and CD105(+). When exposed to in vitro differentiation, hATSCs, hASSCs and hNSSCs exhibited quantitative differences in their ability to differentiate into adipocytes and to osteoblastic cells. Using a microarray-based approach we have unveiled a common MSC molecular signature composed of 33 CD markers including known MSC markers and several novel markers e.g. CD165, CD276, and CD82. However, significant differences in the molecular phenotype between these different stromal cell populations were observed suggesting ontological and functional differences. In conclusion, MSC populations obtained from different tissues exhibit significant differences in their proliferation, differentiation and molecular phenotype, which should be taken into consideration when planning their use in clinical protocols.
authors.affiliation: Stem Cell Unit, Department of Anatomy 28, College of Medicine, King Saud University, P.O. Box 2925, Riyadh, 11461, Kingdom of Saudi Arabia. malnbaheen@ksu.edu.sa
authors.forename: May
authors.initials: M
authors.lastname: Al-Nbaheen
authors.forename: Radhakrishnan
authors.initials: R
authors.lastname: Vishnubalaji
authors.forename: Dalia
authors.initials: D
authors.lastname: Ali
authors.forename: Amel
authors.initials: A
authors.lastname: Bouslimi
authors.forename: Fawzi
authors.initials: F
authors.lastname: Al-Jassir
authors.forename: Matthias
authors.initials: M
authors.lastname: Megges
authors.forename: Alessandro
authors.initials: A
authors.lastname: Prigione
authors.forename: James
authors.initials: J
authors.lastname: Adjaye
authors.forename: Moustapha
authors.initials: M
authors.lastname: Kassem
authors.forename: Abdullah
authors.initials: A
authors.lastname: Aldahmash
mesh_terms: D017667:Adipocytes / Q000166:cytology / Q000378:metabolism; D000273:Adipose Tissue / Q000166:cytology*; D000469:Alkaline Phosphatase / Q000032:analysis; D015703:Antigens, CD / Q000096:biosynthesis; D015415:Biomarkers; D001853:Bone Marrow; D001854:Bone Marrow Cells / Q000166:cytology*; D018929:Cell Culture Techniques; D002454:Cell Differentiation; D049109:Cell Proliferation; D002478:Cells, Cultured; D006801:Humans; D008297:Male; D059630:Mesenchymal Stem Cells / Q000166:cytology*; D020411:Oligonucleotide Array Sequence Analysis; D010006:Osteoblasts / Q000378:metabolism; D010641:Phenotype; D012867:Skin / Q000166:cytology*
chemical_list: D015703:Antigens, CD; D015415:Biomarkers; D000469:Alkaline Phosphatase