165 results about "Gp41" patented technology

This invention provides a modified gp140 envelope polypeptide of an HIV-1 isolate comprising a gp120 polypeptide portion comprising consecutive amino acids and a gp41 ectodomain polypeptide portion comprising consecutive amino acids, said gp41 ectodomain polypeptide portion being modified to comprise isoleucine (I) at an amino acid position equivalent to amino acid position 535; glutamine (Q) at an amino acid position equivalent to amino acid position 543; serine (S) at an amino acid position equivalent to amino acid position 553; lysine (K) at an amino acid position equivalent to amino acid position 567; and arginine (R) at an amino acid position equivalent to amino acid position 588, the amino acid positions being numbered by reference to the HIV-1 isolate KNH1144. This invention also provides nucleic acids encoding such a polypeptide, vectors, host cells, trimeric complexes and compositions thereof. Also provided are antibodies generated against the modified polypeptides and trimeric complexes, and methods of using the modified polypeptides, compositions and trimeric complexes.

The present application is directed to stabilized HIV envelope glycoprotein trimers. The trimers are stabilized by introducing trimeric motifs, preferably the GCN4 coiled coil or the fibritin trimeric domain at certain sites, for example in the gp41 ectodomain. These stabilized trimers or DNA molecules encoding such trimers can be used to generate an immunogenic reaction. The trimers can also be used in assays to screen for molecules that interact with them—and to identify molecules that interact with specific sites.

The present invention relates, in general, to an immunogen and, in particular, to an immunogen for inducing antibodies that neutralize a wide spectrum of HIV primary isolates and / or to an immunogen that induces a T cell immune response. The invention also relates to a method of inducing anti-HIV antibodies, and / or to a method of inducing a T cell immune response, using such an immunogen. The invention further relates to nucleic acid sequences encoding the present immunogens.

The present invention is directed to the induction and characterization of a humoral immune response targeting “entry-relevant” gp41 structures. In its broadest aspect, the present invention is directed to methods of raising a neutralizing antibody response to a broad spectrum of HIV strains and isolates. The present invention targets particular molecular conformations or structures that occur at the cell surface of HIV during viral entry into host cells. Such a humoral response can be generated in vivo as a prophylactic measure in individuals to reduce or inhibit the ability of HIV to infect uninfected cells in the individual's body. Such a response can also be employed to raise antibodies against “entry relevant” gp41 structures. These antibodies can be employed for therapeutic uses, and as tools for further illuminating the mechanism of HIV cell entry.

A method for treating HIV infection is disclosed. The method comprises administering to a patient in need thereof a therapeutically effective amount of a fusion protein comprising: a) a Pseudomonas Exotoxin A (PE) peptide comprising a binding domain and a PE translocation domain, the PE peptide being devoid of cytotoxic domain III; b) optionally gag24, being fused to the PE peptide; c) a fragment of gp120 C1 domain, being fused to the PE peptide or fused to the gag24 if the gag24 is present; d) a fragment of gp 120 C5 domain, being fused to the fragment of gp120 C1 domain; e) a fragment of gp41 amino acid sequence, being fused to the fragment of gp 120 C5 domain, and f) optionally an endoplasmic reticulum retention sequence, being fused to the C-terminus of the fragment of gp41.

The invention provides lipophilic conjugates comprising a short isolated peptide coupled to a hydrophobic moiety, the peptide comprising a sequence derived from the HIV-1 gp41 N-terminal heptad repeat domain, said peptide after conjugation to the hydrophobic moiety possesses anti-fusogenic activity higher than prior to conjugation. The lipophilic conjugates are suitable for treatment of infections caused by human and non-human retroviruses, especially HIV.

The present invention relates, in general, to HIV-1 antibodies and, in particular, to broadly neutralizing HIV-1 antibodies that target the gp41 membrane-proximal external region (MPER).

The present application is directed to stabilized HIV envelope glycoprotein trimers. The trimers are stabilized by introducing trimeric motifs, preferably the GCN4 coiled coil or the fibritin trimeric domain, at certain sites, for example in the gp41 ectodomain. These stabilized trimers or DNA molecules encoding such trimers can be used to generate an immunogenic reaction. The trimers can also be used in assays to screen for molecules that interact with them—and to identify molecules that interact with specific sites.