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2004 OCT 6 - (NewsRx.com & NewsRx.net) -- Oral immunization with bovine papillomavirus-HIV-1 gp41 chimeric virus-like particles induced mucosal and systemic neutralizing antibodies against human immunodeficiency virus type 1 (HIV-1).
"Human immunodeficiency virus type 1 (HIV-1) envelope-specific neutralizing antibodies are generated late after initial infection, and the neutralizing antibody response is weak in the infected individuals. Administration of neutralizing antibodies such as 2F5 to HIV-1-infected individuals resulted in reductions in viral loads. Because HIV-1 is transmitted mainly via mucosa and because HIV-specific neutralizing antibodies reduce HIV-1 in infected individuals, a vaccine that can induce both mucosal and systemic HIV-1-specific neutralizing antibodies may be used to prevent and to treat HIV-1 infection," scientists in the United States report.
"In this study, we made a bovine papillomavirus (BPV) L1-HIV-1 gp41 fusion protein in which ELDKWA of gp41 was inserted into the N terminus of BPV L1 (amino acids 130 to 136)," said Hongtao Zhang and colleagues at Loyola University. "Expression of the fusion protein in insect cells led to the assembly of chimeric virus-like particles (CVLPs). The CVLPs had sizes similar to those of BPV particles and were able to bind to the cell surface and penetrate the cell membrane. Oral immunization of mice with CVLPs induced gp41-specific serum immunoglobulin G (IgG) and intestinal secretory IgA."
"However, ...
Source: HighBeam Research, Papillomavirus-HIV-1 gp41 virus-like particles induce HIV antibodies.