title: Biological character of human adipose-derived adult stem cells and influence of donor age on cell replication in culture.
abstract: To investigate the biological character of human adipose-derived adult stem cells (hADAS cells) when cultured in vitro and the relationship between hADAS cell's replication activity and the donor's age factor, and to assess the stem cells as a new source for tissue engineering. hADAS cells are isolated from human adipose tissue of different age groups (from adolescents to olds: <20 years old, 21-40 years old, 41-60 years old and >61 years old groups). The protein markers (CD29, CD34, CD44, CD45, CD49d, HLA-DR, CD106) of hADAS cells were detected by flow cytometry (FCM) to identify the stem cell, and the cell cycle was examined for P20 hADAS cells to evaluate the safety of the subculture in vitro. The generative activity of hADAS cells in different age groups was also examined by MTT method. The formula "TD = t x log2/logNt - logN0" was used to get the time doubling (TD) of the cells. The results showed that the cells kept heredity stabilization by chromosome analysis for at least 20 passages. The TD of these cells increased progressively by ageing, and the TD of the <20 years old group was lower than that of the >61 years old group (statistical analysis of variance (ANOVA), P=0.002, P<0.05). These findings suggested that a higher level of hADAS cells replication activity was found in the younger donators, and they represent novel and valuable seed cells for studies of tissue engineering.
authors.affiliation: Department of Orthopedics, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Lei
authors.forename: WeiMing
authors.initials: W
authors.lastname: Liao
authors.forename: PuYi
authors.initials: P
authors.lastname: Sheng
authors.forename: Ming
authors.initials: M
authors.lastname: Fu
authors.forename: AiShan
authors.initials: A
authors.lastname: He
authors.forename: Gang
authors.initials: G
authors.lastname: Huang
mesh_terms: D000273:Adipose Tissue / Q000166:cytology* / Q000276:immunology; D000328:Adult; D015703:Antigens, CD / Q000032:analysis; D018929:Cell Culture Techniques / Q000379:methods; D002455:Cell Division; D006684:HLA-DR Antigens / Q000032:analysis; D006801:Humans; D039423:Integrin alpha1 / Q000032:analysis; D007621:Karyotyping; D008297:Male; D008875:Middle Aged; D013234:Stem Cells / Q000166:cytology* / Q000276:immunology
chemical_list: D015703:Antigens, CD; D006684:HLA-DR Antigens; D039423:Integrin alpha1