title: Physicochemical and biological characterization of 1E10 anti-idiotype vaccine.
abstract: BACKGROUND
  1E10 monoclonal antibody is a murine anti-idiotypic antibody that mimics N-glycolyl-GM3 gangliosides. This antibody has been tested as an anti-idiotypic cancer vaccine, adjuvated in Al(OH)3, in several clinical trials for melanoma, breast, and lung cancer. During early clinical development this mAb was obtained in vivo from mice ascites fluid. Currently, the production process of 1E10 is being transferred from the in vivo to a bioreactor-based method.
  
  
  RESULTS
  Here, we present a comprehensive molecular and immunological characterization of 1E10 produced by the two different production processes in order to determine the impact of the manufacturing process in vaccine performance. We observed differences in glycosylation pattern, charge heterogeneity and structural stability between in vivo-produced 1E10 and bioreactor-obtained 1E10. Interestingly, these modifications had no significant impact on the immune responses elicited in two different animal models.
  
  
  CONCLUSIONS
  Changes in 1E10 primary structure like glycosylation; asparagine deamidation and oxidation affected 1E10 structural stability but did not affect the immune response elicited in mice and chickens when compared to 1E10 produced in mice.
authors: Center for Molecular Immunology, Atabey Siboney, Playa, Havana 11600, Cuba. yohanm@cim.sld.cu
authors: Yoan J
authors: YJ
authors: Machado
authors: Yamilet
authors: Y
authors: Rabasa
authors: Raquel
authors: R
authors: Montesinos
authors: José
authors: J
authors: Cremata
authors: Vladimir
authors: V
authors: Besada
authors: Dasha
authors: D
authors: Fuentes
authors: Adolfo
authors: A
authors: Castillo
authors: Kathya R
authors: KR
authors: de la Luz
authors: Ana M
authors: AM
authors: Vázquez
authors: Martin
authors: M
authors: Himly
mesh_terms: D000818:Animals; D000888:Antibodies, Anti-Idiotypic / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology; D000911:Antibodies, Monoclonal / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology; D000918:Antibody Specificity; D001216:Asparagine / Q000378:metabolism; D019149:Bioreactors; D001943:Breast Neoplasms / Q000188:drug therapy / Q000276:immunology; D019496:Cancer Vaccines / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology; D002645:Chickens; D002851:Chromatography, High Pressure Liquid; D003520:Cyclophosphamide / Q000627:therapeutic use; D005260:Female; D006031:Glycosylation; D051379:Mice; D010084:Oxidation-Reduction; D011487:Protein Conformation; D055550:Protein Stability; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
chemical_list: D000888:Antibodies, Anti-Idiotypic; D000911:Antibodies, Monoclonal; D019496:Cancer Vaccines; D001216:Asparagine; D003520:Cyclophosphamide