A model system to study the effects of methylglyoxal on the yield and quality of tissue plasminogen activator produced by CHO cells Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/pg15bj63r

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  • In this research, a model system for studying the effects of the toxic metabolite, methylglyoxal, was created using Chinese Hamster Ovary (CHO) cells which produce tissue plasminogen activator (t-PA). The human gene for glyoxalase I was subcloned into an inducible mammalian expression vector. This vector was then used to create three stable CHO integrants, two control and one putative glyoxalase I producing cell lines. The CHO clones were characterized for the production of glyoxalase I using both SDS-PAGE gels and glyoxalase activity assays. In addition, the cell lines were evaluated to determine the levels of free methylglyoxal produced. The putative glyoxalase producer showed higher levels of glyoxalase I activity than the parent cell line and produced a unique protein band at the correct molecular weight. They also had a significantly lower level of free methylglyoxal than either of the two control cell lines. These cells can now be used as a tool to determine the specific effect of methylglyoxal on the yield and quality of tissue plasminogen activator produced.
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