title: Short communication: evaluating the level of expressed HIV type 1 gp120 and gag proteins in the vCP1521 vector by two immunoplaque methods.
abstract: Over the past few years, several recombinant ALVAC constructs have been used as delivery systems in various vaccine research studies and trials. The ALVAC-HIV vCP1521 vector has been used as a vaccine delivery system in the RV144 study, a phase III HIV study that displayed over 31% protective efficacy. One of the important parameters for evaluating the potency of an ALVAC construct is the stable expression of proteins encoded by the inserted genes. Herein, the expression of inserted gp120 and gag genes in two manufactured ALVAC-HIV vCP1521 lots have been determined by two immunoplaque methods (dish and plaque lift). Both methods were specific and robust and demonstrated that the ALVAC-HIV vCP1521 lots were able to express gp120 and gag proteins in over 99% of the infectious plaques.
authors.affiliation: Microbiology and Virology Platform, Department of Analytical Research and Development North America, Sanofi Pasteur, Toronto, Ontario M2R 3T4, Canada. ali.azizi@sanofipasteur.com
authors.forename: Ali
authors.initials: A
authors.lastname: Azizi
authors.forename: Kerrie Nichol
authors.initials: KN
authors.lastname: Edamura
authors.forename: Glenda
authors.initials: G
authors.lastname: Leung
authors.forename: Lucy
authors.initials: L
authors.lastname: Gisonni-Lex
authors.forename: Laurent
authors.initials: L
authors.lastname: Mallet
mesh_terms: D016915:AIDS Vaccines / Q000235:genetics*; D000956:Antigens, Viral / Q000096:biosynthesis*; D005822:Genetic Vectors; D015699:HIV Envelope Protein gp120 / Q000096:biosynthesis*; D007118:Immunoassay / Q000379:methods; D013678:Technology, Pharmaceutical / Q000379:methods*; D014773:Virology / Q000379:methods*; D054301:gag Gene Products, Human Immunodeficiency Virus / Q000096:biosynthesis*
chemical_list: D016915:AIDS Vaccines; C112734:AIDSVAX; D000956:Antigens, Viral; D015699:HIV Envelope Protein gp120; D054301:gag Gene Products, Human Immunodeficiency Virus; C514793:gp120 protein, Human immunodeficiency virus 1