Abstract:
The present invention relates to pharmaceutical compositions comprising virus-like particles (VLPs) of HPV, said VLPs adsorbed to an aluminum adjuvant, and an ISCOM-type adjuvant comprising a saponin, cholesterol, and a phospholipid. In preferred embodiments, the aluminum adjuvant comprises amorphous aluminum hydroxyphosphate sulfate. Another aspect of the invention provides multi-dose HPV vaccine formulations comprising HPV VLPs and an antimicrobial preservative selected from the group consisting of: m-cresol, phenol and benzyl alcohol. Also provided are methods of using the disclosed pharmaceutical compositions and formulations to induce an immune response against HPV in a human patient and to prevent HPV infection.
Abstract:
An efficient means of inducing an immune response against human immunodeficiency virus (“HIV”) utilizing specific prime-boost regimes is disclosed. The specific prime-boost regimes employ a heterologous prime-boost protocol wherein recombinant adenoviral and poxvirus vectors comprising exogenous genetic material encoding a common HIV antigen are administered in that order. Vaccines administered into living vertebrate tissue in accordance with the disclosed regimes, preferably a mammalian host such as a human or a non-human mammal of commercial or domestic veterinary importance, express the HIV-1 antigen (e.g., Gag), inducing a cellular immune response which specifically recognizes HIV-1. It is believed that the disclosed prime/boost regime will offer a prophylactic advantage to previously uninfected individuals and/or provide a therapeutic effect by reducing viral load levels within an infected individual, thus prolonging the asymptomatic phase of HIV-1 infection.
Abstract:
The present invention provides an improved method for eliciting a therapeutic immune response in an individual infected with human immunodeficiency virus (“HIV”). The method comprises administering an adenoviral vaccine composition expressing an HIV antigen to an individual with controlled viremia. Immunization of infected individuals in this manner elicits a cellular-mediated immune response against the virus that is significant both in the level of the response and the breadth of the response. The therapeutic immune response that ensues is capable of effectively maintaining low titers of virus and, thus, offers the prospect of reducing individual dependency on antiviral therapy.
Abstract:
An efficient means of inducing an immune response against human immunodeficiency virus (HIV) utilizing specific prime-boost regimes is disclosed. The specific prime-boost regimes employ a heterologous prime-boost protocol employing recombinant adenoviral vectors of alternative and distinct serotypes comprising exogenous genetic material encoding a common HIV antigen. Vaccines administered into living vertebrate tissue in accordance with the disclosed regimes, preferably a mammalian host, such as a human or a non-human mammal of commercial or domestic veterinary importance, express the HIV-1 antigen (e.g., Gag), inducing a cellular immune response which specifically recognizes HIV-1. It is believed that the disclosed prime/boost regime will offer a prophylactic advantage to previously uninfected individuals and/or provide a therapeutic effect by reducing viral load levels within an infected individual, thus prolonging the asymptomatic phase of HIV-1 infection.
Abstract:
First generation adenoviral vectors and associated recombinant adenovirus-based HIV vaccines which show enhanced stability and growth properties and greater cellular-mediated immunity are described within this specification. These adenoviral vectors are utilized to generate and produce through cell culture various adenoviral-based HIV-1 vaccines which contain HIV-1 gag, HIV-1 pol and/or HIV-1 nef polynucleotide pharmaceutical products, and biologically relevant modifications thereof. These adenovirus vaccines, when directly introduced into living vertebrate tissue, preferably a mammalian host such as a human or a non-human mammal of commercial or domestic veterinary importance, express the HIV1-Gag, Pol and/or Nef protein or biologically modification thereof, inducing a cellular immune response which specifically recognizes HIV-1. The exemplified polynucleotides of the present invention are synthetic DNA molecules encoding HIV-1 Gag, encoding codon optimized HIV-1 Pol, derivatives of optimized HIV-1 Pol (including constructs wherein protease, reverse transcriptase, RNAse H and integrase activity of HIV-1 Pol is inactivated), HIV-1 Nef and derivatives of optimized HIV-1 Nef, including nef mutants which effect wild type characteristics of Nef, such as myristylation and down regulation of host CD4. The adenoviral vaccines of the present invention, when administered alone or in a combined modality regime, will offer a prophylactic advantage to previously uninfected individuals and/or provide a therapeutic effect by reducing viral load levels within an infected individual, thus prolonging the asymptomatic phase of HIV-1 infection.
Abstract:
First generation adenoviral vectors and associated recombinant adenovirus-based HIV vaccines which show enhanced stability and growth properties and greater cellular-mediated immunity are described within this specification. These adenoviral vectors are utilized to generate and produce through cell culture various adenoviral-based HIV-1 vaccines which contain HIV-1 gag, HIV-1 pol and/or HIV-1 nef polynucleotide pharmaceutical products, and biologically relevant modifications thereof. These adenovirus vaccines, when directly introduced into living vertebrate tissue, preferably a mammalian host such as a human or a non-human mammal of commercial or domestic veterinary importance, express the HIV1-Gag, Pol and/or Nef protein or biologically modification thereof, inducing a cellular immune response which specifically recognizes HIV-1. The exemplified polynucleotides of the present invention are synthetic DNA molecules encoding HIV-1 Gag, encoding codon optimized HIV-1 Pol, derivatives of optimized HIV-1 Pol (including constructs wherein protease, reverse transcriptase, RNAse H and integrase activity of HIV-1 Pol is inactivated), HIV-1 Nef and derivatives of optimized HIV-1 Nef, including nef mutants which effect wild type characteristics of Nef, such as myristylation and down regulation of host CD4. The adenoviral vaccines of the present invention, when administered alone or in a combined modality regime, will offer a prophylactic advantage to previously uninfected individuals and/or provide a therapeutic effect by reducing viral load levels within an infected individual, thus prolonging the asymptomatic phase of HIV-1 infection.
Abstract:
The present invention relates to the use of increased culture pH, relative to standard insect cell culture conditions, during baculovirus infection of lepidopteran insect cells to enable production of recombinant chikungunya (CHIKV) virus like particles (VLPs). The invention further relates to adapted insect cell lines derived from insect cells such as Sf21, which can grow robustly at elevated culture pH, the use of said cell lines to recombinantly produce pH sensitive proteins in the correct conformation and increase expression of recombinant proteins relative to standard insect cell lines. In some embodiments of the invention, the cells are useful for recombinant production of CHIKV VLPs. The invention also relates to a method for the production of a pH-adapted lepidopteran insect cell line. In some embodiments of said method, the cell line is produced and/or maintained in reduced phosphate serum-free insect cell media.
Abstract:
The present invention relates to pharmaceutical compositions comprising virus-like particles (VLPs) of HPV, said VLPs adsorbed to an aluminum adjuvant, and an ISCOM-type adjuvant comprising a saponin, cholesterol, and a phospholipid. In preferred embodiments, the aluminum adjuvant comprises amorphous aluminum hydroxyphosphate sulfate. Another aspect of the invention provides multi-dose HPV vaccine formulations comprising HPV VLPs and an antimicrobial preservative selected from the group consisting of: m-cresol, phenol and benzyl alcohol. Also provided are methods of using the disclosed pharmaceutical compositions and formulations to induce an immune response against HPV in a human patient and to prevent HPV infection.
Abstract:
The present invention relates to pharmaceutical compositions comprising virus-like particles (VLPs) of HPV, said VLPs adsorbed to an aluminum adjuvant, and an ISCOM-type adjuvant comprising a saponin, cholesterol, and a phospholipid. In preferred embodiments, the aluminum adjuvant comprises amorphous aluminum hydroxyphosphate sulfate. Another aspect of the invention provides multi-dose HPV vaccine formulations comprising HPV VLPs and an antimicrobial preservative selected from the group consisting of: m-cresol, phenol and benzyl alcohol. Also provided are methods of using the disclosed pharmaceutical compositions and formulations to induce an immune response against HPV in a human patient and to prevent HPV infection.
Abstract:
Applicants disclose herein novel methods, vectors, and vector compositions for improving the efficiency of adenoviral vectors in the delivery and expression of heterologous nucleic acid encoding a polypeptide(s) (e.g, a protein or antigen) of interest. Adenoviral infection is quite common in the general population, and a large percentage of people have neutralizing antibodies to the more prevalent adenoviral serotypes. Such pre-existing anti-adenoviral immunity can dampen or possibly abrogate the effectiveness of this virus for the delivery and expression of heterologous proteins or antigens. The method taught herein functions to offset pre-existing immunity through the delivery of the protein or antigen by a cocktail of at least two adenoviral serotypes. Utilizing a composition of at least two adenoviral serotypes in this manner has been found to increase the effectiveness of adenoviral administration. Adenoviral vectors of utility in the elicitation of an immune response against Human Immunodeficiency Virus (“HIV”) are also disclosed.