摘要:
The present invention relates to an agonistic anti-CD40 antibody which is shown to bind and activate CD40. In particular secretion of high levels of IL-12p40 by dendritic cells (DC) is demonstrated.
摘要:
Compositions comprising viral antigens and antigenic peptides corresponding to or derived from Hepatitis C virus (HCV) proteins or fragments thereof, fused to heavy and/or light chain of antibodies, or fragments thereof specific for dendritic cells (DCs) are described herein. Included herein are immunostimulatory compositions (HCV vaccines, HCV antigen presenting dendritic cells, etc.) and methods for increasing effectiveness of HCV antigen presentation by an antigen presenting cell, for a treatment, a prophylaxis or a combination thereof against hepatitis C in a human subject, and methods of providing immunostimulation by activation of one or more dendritic cells, methods to treat or prevent hepatitis C.
摘要:
Immunostimulatory compositions and methods comprising an ITIM motif-containing DC immunoreceptor (DCIR) to mediate potent crosspresentation are described herein. The inventors evaluated human CD8+ T cell responses generated by targeting antigens to dendritic cells (DCs) through various lectin receptors. A single exposure to a low dose of anti-DCIR-antigen conjugate initiated antigen-specific CD8+ T cell immunity by all human DC subsets including ex vivo generated DCs, skin-isolated Langerhans cells and blood mDCs and pDCs. Enhanced specific CD8+ T cell responses were observed when antigens like, FluMP, MART-1, viral (HIV gag), etc. were delivered to the DCs via DCIR, compared to those induced by a free antigen, or antigen conjugated to a control mAb or delivered via DC-SIGN, another lectin receptor. Addition of Toll-like receptor (TLR) 7/8-agonist enhanced DCIR-mediated crosspresentation as well as crosspriming. Thus, antigen targeting via the human DCIR receptor allows activation of specific CD8+ T cell immunity.
摘要:
The present invention includes compositions and methods for making and using a vaccine that includes a DC-specific antibody or fragment thereof to which an engineered Gag antigen is attached to form an antibody-antigen complex, wherein the Gag antigen is less susceptible to proteolytic degradation by eliminating one or more proteolytic sites or a DC-specific antibody or fragment thereof to which an engineered Nef antigen is attached to form an antibody-antigen complex, wherein the Nef antigen comprises one or more codon usage optimization that increase antibody-antigen complex secretion, or both, wherein the vaccine is able to elicit an HIV-specific T cell immune response to Gag p17, Gag p24, Nef and/or Cyclin D1.
摘要:
Embodiments relate to novel vaccines against human papillomavirus (HPV) and HPV-related diseases, including multiple types of cancers. The HPV vaccines are composed of anti-human dendritic cell (DC) surface receptor antibodies, including CD40, and E6/7 proteins of HPV 16 and 18. The technology described is not limited to making vaccines against HPV16- and HPV18-related diseases and can be applied to making vaccines carrying E6/7 from any type of HPV. The HPV vaccines descirbed can target DCs, major and professional antigen presenting cells (APCs), and can induce and activate potent HPV E6/7-specific and strong CD4+ and CD8+ T cell responses. The HPV vaccines can be used for the prevention of HPV infection and HPV-related diseases as well as for the treatment of HPV-related diseases, including cancers.
摘要:
The present invention includes compositions and methods for the expression, secretion and use of novel compositions for use as, e.g., vaccines and antigen delivery vectors, to delivery antigens to antigen presenting cells. In one embodiment, the vector is an anti-CD40 antibody, or fragments thereof, and one or more antigenic peptides linked to the anti-CD40 antibody or fragments thereof, including humanized antibodies.