Since the cloning of Dolly there has been little change in the efficiency of nuclear
transfer (NT). Research is beginning to investigate the characteristics of donor cells. Adiposetissue is an abundant source of adult-derived cells that have displayed stemness in-vitro(Gimble et al., 2003). The overall goal of this research was to define the in-vitro characteristicsof bovine adipose-derived adult stem cells (ADAS) for the use in NT. Isolation methods weredetermined by a 3 x 3 factorial design. 1 g of subcutaneous fat was collected and subjected to0.10%, 0.25% or 0.50% collagenase type I solution for 1, 2 and 3 h. Nucleated cells werecounted using heochst stain. There was no significant difference (P>0.05) in number of
nucleated cells released during the incubation period or collagenase concentrations. Viable
cells were determined by those that remained adherent 24 h post plating. Incubation in 0.25%
collagenase for 2 h had the consistently highest percentage of viable cells (45%). The lifespan
and growth characteristics were determined by in a 2 x 2 factorial experiment of DMEM or DMEM:F12 supplemented or not supplemented with growth factors. DMEM with growth factors supplementation was significantly shorter lifespan (P>0.05) than DMEM:F12. The averagelifespan was ~30 population doublings (PDs), with 1 cell cycle every two days until passage 8(P8). Two bovine ADAS cell lines were differentiated into adipocytes, chondrocytes and osteoblasts at middle and late passages along side of adult derived skin fibroblasts. Differentiation was confirmed by histological staining resulting in early passage ADAS cells
staining more intensely compared to late passage ADAS cells and skin fibroblasts. Global levels
of DNA methylation and histone acetylation were analyzed from P1 to P6 in ADAS and skin fibroblasts from three animals. There was no significant difference (P>0.05) between cell types
for DNA methylation or histone acetylation. The percentage of cleaved and developing blastocyst embryos from the ADAS cells (62% and 8%) and skin fibroblasts cells (42% and 8%)were not different (P>0.05). Interspecies nuclear transfer utilized eland ADAS cells into enucleated bovine oocytes. A total of 3 interspecies embryos (1%) developed to blastocyst.
| Identifer | oai:union.ndltd.org:LSU/oai:etd.lsu.edu:etd-07142009-134947 |
| Date | 17 July 2009 |
| Creators | Picou, Alicia A |
| Contributors | Bondioli, Keneth, Godke, Robert, Lopez, Mandi |
| Publisher | LSU |
| Source Sets | Louisiana State University |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lsu.edu/docs/available/etd-07142009-134947/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached herein a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to LSU or its agents the non-exclusive license to archive and make accessible, under the conditions specified below and in appropriate University policies, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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