title: Genomic and proteomic exploration of CHO and hybridoma cells under sodium butyrate treatment.
abstract: Sodium butyrate has been known to increase the specific productivity of recombinant proteins in mammalian cells. In quest of physiological mechanisms leading to the increased productivity, DNA microarray and two dimensional gel electrophoresis (2DE) were used to assess the response of Chinese hamster ovary (CHO) and a mouse hybridoma cell (MAK) to butyrate treatment at the transcriptome and proteome level. The expression of the orthologous genes represented on both CHO cDNA and mouse Affymetrix microarray, as well as genes in the same ontological class were compared. Only a relatively small number of orthologs changed their expression consistently between the two cell lines, however, at a functional class level many genes involved in cell cycle and apoptosis were affected in both cell lines. Furthermore, a large number of genes involved in protein processing, secretion and redox activity were upregulated in both CHO and MAK cells. More genes showed a consistent trend of change at both transcript and protein levels than those which showed opposite trend in MAK cells. Overall the results suggested that the changes arising in the protein processing machinery may be responsible for the increased productivity upon butyrate treatment in both CHO and MAK cells.
authors.affiliation: Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, MN 55455-0132, USA.
authors.forename: Joon Chong
authors.initials: JC
authors.lastname: Yee
authors.forename: Marcela
authors.initials: M
authors.lastname: de Leon Gatti
authors.forename: Robin J
authors.initials: RJ
authors.lastname: Philp
authors.forename: Miranda
authors.initials: M
authors.lastname: Yap
authors.forename: Wei-Shou
authors.initials: WS
authors.lastname: Hu
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000187:drug effects; D002087:Butyrates / Q000494:pharmacology*; D016466:CHO Cells; D002453:Cell Cycle / Q000187:drug effects; D045744:Cell Line, Tumor; D006224:Cricetinae; D003412:Cricetulus; D015180:Electrophoresis, Gel, Two-Dimensional; D015870:Gene Expression / Q000187:drug effects*; D020869:Gene Expression Profiling; D023281:Genomics; D006825:Hybridomas; D051379:Mice; D020411:Oligonucleotide Array Sequence Analysis; D011506:Proteins / Q000378:metabolism; D040901:Proteomics
chemical_list: D002087:Butyrates; D011506:Proteins