摘要:
The instant invention provides for novel lipid nanoparticle (LNP) formulations, containing cationic lipids, for use as vaccine adjuvants and/or as antigen delivery systems. It is an object of the instant invention to provide LNP formulations that demonstrate enhancements in humoral and cellular immunogenicity of vaccine antigens, particularly subunit vaccine antigens, when utilized alone or in combination with immunostimulatory agents (e.g. small molecule or oligonucleotide TLR agonists). The instant invention further identifies physical and chemical properties of the LNP formulations that can be manipulated to enhance antigen efficiency and adjuvant tolerability in vivo.
摘要:
The invention provides a protein comprising hepatitis B core antigen (HBcAg) with a sugar attached to an e1 loop. The protein may comprise a first and a second copy of HBcAg in tandem, wherein one or both copies of HBcAg has a sugar attached to the e1 loop. The first copy may have a sugar attached to the e1 loop and the second copy may comprise a peptide epitope in the e1 loop. The protein may be used to induce an immune response against the sugar and hence act as a vaccine.
摘要:
A lentivector has been engineered to express a fusion antigen composed of hepatitis B surface protein (HBsAg) and lgG2a Fc fragment (HBS-Fc-lv) to increase both the magnitude of CD8 response and to induce effective co-activation of CD4 T cells. Immunization with this HBS-Fc-lv caused significant regression of established tumors. Immunological analysis revealed that, compared to HBS-lv without the Fc fragment, immunization with HBS-Fc-lv markedly increased the number of functional CD8 and CD4 T cells and the level of Th1/Tc1 -like cytokines in the tumor, while substantially decreasing the Treg ratio. The favorable immunologic changes in tumor lesions and the improvement of antitumor effects from HBS-Fc-lv immunization were dependent on the CD4 activation, which was Fc receptor mediated. Adoptive transfer of the CD4 T cells from the HBS-Fc-lv immunized mice could activate endogenous CD8 T cells in an IFNy-dependent manner. Endogenous CD4 T cells can be activated by lentivirus expressing Fc-tagged antigen to provide another layer of help, i.e., creating a Th1/Tc1 like pro-inflammatory milieu within the tumor lesion to help the effector phase of immune responses to enhance the antitumor effect.
摘要:
A pharmaceutical composition for use in killing and/or inhibiting the growth and/or proliferation of a microorganism in a subject in need thereof, or for treating a subject afflicted with a microbial infection is disclosed. The composition comprises: (a) an effective amount of an isolated peptide, wherein the peptide comprises the arginine-rich carboxy-terminal region of hepatitis B virus core protein (HBc) and exhibits an antimicrobial activity; and (b) a pharmaceutically acceptable carrier. The peptide exhibits an activity against Gram-negative bacteria, Gram-positive bacteria, and/or fungi.
摘要:
The invention provides a VLP free of a viral genome comprising two or more display polypeptides, nucleic acid molecules, polymers of the nucleic acid, lipopolysaccharides, lipopeptides, peptidoglycans and/or small molecules.
摘要:
The invention relates to an acellular pertussis (aP) vaccine composition comprising Bordetella pertussis antigens pertussis toxoid (PT), filamentous hemagglutinin (FHA), and fimbriae types 2 and 3 (FIM), and optionally pertactin (PRN), wherein FIM is present in an amount of 12-100 µg per human dose.
摘要:
In a first aspect, the present invention relates to the use of a TLR 9 agonist and/or a TLR 4 agonist in a prophylactic or therapeutic vaccine. According to the present vaccination strategy, the TLR 9 agonist and/or TLR 4 agonist is adapted or designed for use as a multiplying jump agent to enhance numbers and functionality of CD8 T cells in a prime-jump vaccination strategy for jump T cell expansion. In particular, the TLR 9 agonist and/or TLR 4 agonist is used as a component to be administered after priming of the individual to be vaccinated. The vaccination strategy is particularly useful against acute and chronic infections with intracellular pathogens or for anti-tumor vaccination. In another aspect, the present invention relates to a kit of part containing a prime agent and a multiplying jump agent according to the present invention.