Title page for ETD etd-11182010-204302

Type of Document Master's Thesis
Author Coley, Laura Whitney
Author's Email Address lcoley1@tigers.lsu.edu
URN etd-11182010-204302
Title Cell Extract-Based Reprogramming of Somatic Cells
Degree Master of Science (M.S.)
Department Animal Science (Animal, Dairy, & Poultry Sciences)
Advisory Committee
Advisor Name Title
Bondioli, Kenneth Committee Chair
Dimario, Patrick Committee Member
Eilersten, Kenneth Committee Member
Godke, Robert Committee Member
  • Cell extracts
Date of Defense 2010-11-05
Availability unrestricted
The differentiation potential of adult stem cells (ASC) has long been thought to be limited to cell lineages present in the organ from which they are derived; however, several studies have challenged this notion by demonstrating that some ASC exhibit a remarkably high degree of plasticity. Unlike terminally differentiated somatic cells, the less differentiated state of ASC can assume the functional phenotypes and expression profiles of cells unique to other tissues. The expansive repertoire of differentiation potential exhibited by ASC suggests these cells possess characteristics similar to pluripotent cells, including epigenomic regulatory pattern. Therefore, ASC may be better equipped for complete epigenetic reprogramming than terminally differentiated cells.

The objective of Experiment 1 was to analyze bovine adipose-derived adult stem cells (ADAS) and fetal fibroblast (BFF) cells for the presence of the pluripotency-associated genes, Oct-4, Nanog, and Sox-2. Because the endogenous expression of these genes is believed to contribute to reprogramming efficiency, Experiment 2 sought to increase Oct-4, Nanog and Sox-2 expression levels in BFF cells through exposure to ADAS cell extracts.

Transcripts for all three pluripotency-associated genes were detected in all BFF and ADAS cell samples at every passage analyzed; however, expression was quite low and highly variable between cell lines and passage numbers. Nevertheless, these findings support the notion that these cells are less differentiated than other somatic cells. This less differentiated state appears to sufficient for at least the partial reprogramming of BFF cells using ADAS cell extracts in a cell extract-based nuclear reprogramming system.

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