title: [Expression of HPV16 L1 protein in insect cell suspension culture system].
abstract: OBJECTIVE
  To express the L1 protein of human papillomavirus type 16 (HPV16) in insect cell suspension culture system.
  
  
  METHODS
  Optimized the conditions of suspension culture, recombinant virus amplification and protein expression. Determined the virus tilter by plague analysis and detected the target protein by SDS-PAGE and Western blot; The formation of VLPs by HPV16 L1 protein was observed with TEM.
  
  
  RESULTS
  The Sf9 cells could grow better in suspension culture with seeding density of 5 x 10-5 cell/mL and the maximum expression quantity was obtained by infection of cells with rBacV/HPV16L1 (MOI =10) and harvesting after 72-84 h. HPV16L1 protein could assemble into VLPs in Sf9 cells observed with TEM.
  
  
  CONCLUSIONS
  The conditions of cell culture, virus amplification and protein expression were optimized. HPV16 L1 protein could assemble into VLPs in Sf9 cells, which would provide a foundation for further study of the vaccine and diagnosis kits.
authors.affiliation: Department of Microbiology and Human Parasitology, Harbin Medical University, Harbin 150081, China.
authors.forename: Cong
authors.initials: C
authors.lastname: Han
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.forename: Quing-long
authors.initials: QL
authors.lastname: Shang
authors.forename: Lan-lan
authors.initials: LL
authors.lastname: Wei
authors.forename: Si-jia
authors.initials: SJ
authors.lastname: Chen
mesh_terms: D000818:Animals; D036022:Capsid Proteins / Q000096:biosynthesis*; D049109:Cell Proliferation; D009856:Oncogene Proteins, Viral / Q000096:biosynthesis*; D011994:Recombinant Proteins / Q000096:biosynthesis; D018411:Spodoptera; D013535:Suspensions; D014771:Virion / Q000648:ultrastructure
chemical_list: D036022:Capsid Proteins; D009856:Oncogene Proteins, Viral; D011994:Recombinant Proteins; D013535:Suspensions; C063317:L1 protein, Human papillomavirus type 16