title: Enhanced recombinant protein production and differential expression of molecular chaperones in sf-caspase-1-repressed stable cells after baculovirus infection.
abstract: BACKGROUND
  There are few studies that have examined the potential of RNA inference (RNAi) to increase protein production in the baculovirus expression vector system (BEVS). Spodoptera frugiperda (fall armyworm) (Sf)-caspase-1-repressed stable cells exhibit resistance to apoptosis and enhancement of recombinant protein production. However, the mechanism of recombinant protein augmentation in baculovirus-infected Caspase-repressed insect cells has not been elucidated.
  
  
  RESULTS
  In the current study, we utilized RNAi-mediated Sf-caspase-1-repressed stable cells to clarify how the resistance to apoptosis can enhance both intracellular (firefly luciferase) and extracellular (secreted alkaline phosphatase [SEAP]) recombinant protein production in BEVS. Since the expression of molecular chaperones is strongly associated with the maximal production of exogenous proteins in BEVS, the differential expression of molecular chaperones in baculovirus-infected stable cells was also analyzed in this study.
  
  
  CONCLUSIONS
  The data indicated that the retention of expression of molecular chaperones in baculovirus-infected Sf-caspase-1-repressed stable cells give the higher recombinant protein accumulation.
authors.affiliation: Institute of Biotechnology, Department of Life Science, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan, R.O.C.
authors.forename: Yiu-Kay
authors.initials: YK
authors.lastname: Lai
authors.forename: John T-A
authors.initials: JT
authors.lastname: Hsu
authors.forename: Chih-Chieh
authors.initials: CC
authors.lastname: Chu
authors.forename: Teng-Yuan
authors.initials: TY
authors.lastname: Chang
authors.forename: Kao-Lu
authors.initials: KL
authors.lastname: Pan
authors.forename: Chih-Chien
authors.initials: CC
authors.lastname: Lin
mesh_terms: D000818:Animals; D016367:Baculoviridae / Q000235:genetics; D020169:Caspases / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D018832:Molecular Chaperones / Q000235:genetics / Q000378:metabolism*; D010957:Plasmids / Q000235:genetics / Q000378:metabolism; D034622:RNA Interference; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000235:genetics; D061987:Sf9 Cells; D018411:Spodoptera; D014162:Transfection
chemical_list: D018832:Molecular Chaperones; D011994:Recombinant Proteins; D020169:Caspases