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To assess the potential of native Envelope glycoprotein (Env) trimers as neutralizing antibody vaccines, we immunized guinea pigs with three types of VLPs and soluble gp120. Particles included “SOS-VLPs” (bearing disulfide-shackled functional trimers), “UNC-VLPs” (bearing uncleaved nonfunctional Env) and “naked VLPs” (bearing no Env). The SOS-VLPs were found to have a density of about 27 native trimers...
Potent, broadly HIV-1 neutralizing antibodies (nAbs) may be invaluable for the design of an AIDS vaccine. 4E10 is the broadest HIV-1 nAb known to date and recognizes a contiguous and highly conserved helical epitope in the membrane-proximal region of gp41. The 4E10 epitope is thus an excellent target for vaccine design as it is also highly amenable to peptide engineering to enhance its helical character...
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