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Lipid-protamine-DNA-mediated antigen delivery enhances immune responses.

Vaccine Weekly

| July 09, 2003 | COPYRIGHT 2003 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

2003 JUL 9 - (NewsRx.com & NewsRx.net) -- Lipid-protamine-DNA-mediated antigen delivery to antigen-presenting cells resulted in enhanced antitumor immune responses.

According to a study from the United States, "Vaccination with antigenic peptides encoding tumor antigens has the potential to be an effective treatment for cancer. To induce tumor-specific cellular immune responses, a peptide antigen must be presented by antigen-presenting cells (APCs) to T-cells in the lymphatic tissues. Effective in vivo delivery of peptide antigens to APCs has been problematic."

"Here we use a model antigen from the HPV16 E7 protein to formulate LPD/E7 particles that upon iv administration are internalized by CD11c+ and CD11b+ cells in the marginal zone of the spleen," reported John Dileo and colleagues at the University of Pittsburgh. "Either i.v. or s.c. vaccination with LPD/E7 particles induces E7-specific CTL responses stronger than those obtained using previously described liposome/peptide strategies and prevents the establishment of E7-expressing tumors. Furthermore, the administration of LPD/E7 particles to tumor-bearing ...

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Source: HighBeam Research, Lipid-protamine-DNA-mediated antigen delivery enhances immune...

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