Abstract: The present invention addresses the need to improve the yields of viral vectors when grown in cell culture systems. In particular, it has been demonstrated that for adenovirus, the use of low-medium perfusion rates in an attached cell culture system provides for improved yields. In other embodiments, the inventors have shown that there is improved Ad-p53 production with cells grown in serum-free conditions, and in particular in serum-free suspension culture. Also important to the increase of yields is the use of detergent lysis. Combination of these aspects of the invention permits purification of virus by a single chromatography step that results in purified virus of the same quality as preparations from double CsCl banding using an ultracentrifuge.

Abstract: The present invention addresses the need to improve the long-term storage stability (i.e. infectivity) of vector formulations. In particular, it has been demonstrated that for adenovirus, the use of bulking agents, cryoprotectants and lyoprotectants imparts desired properties that allow both lyophilized and liquid adenovirus formulations to be stored at 4° C. for up to 6 months and retain an infectivity between 60–100% of the starting infectivity.

Abstract: Compositions and methods for preventing or inhibiting the growth of a hyperproliferative lesion in a subject that include a nucleic acid comprised in a solid or semi-solid formation or in a transdermal or transcutaneous delivery device are disclosed. Also disclosed are compositions of a nucleic acid capable of preventing or inhibiting the growth of a hyperproliferative lesion in a subject that include an adhesive. Compositions of a nucleic acid capable of preventing or inhibiting the growth of a hyperproliferative lesion in a subject that include a nucleic acid uptake enhancer are also disclosed. Methods of preventing or inhibiting the growth of a hyperproliferative lesion in a subject that involve these therapeutic compositions and devices are also disclosed.

Abstract: The present invention relates to improved methods for producing adenovirus compositions wherein host cells are grown in a bioreactor and purified by size partitioning purification to provide purified adenovirus compositions.

Abstract: The present invention addresses the need to improve the yields of viral vectors when grown in cell culture systems. In particular, it has been demonstrated that for adenovirus, the use of low-medium perfusion rates in an attached cell culture system provides for improved yields. In other embodiments, the inventors have shown that there is improved Ad-p53 production cells grown in serum-free conditions, and in particular in serum-free suspension culture. Also important to the increase of yields is the use of detergent lysis. Combination of these aspects of the invention permits purification of virus by a single chromatography step that results in purified virus of the same quality as preparations from double CsCl banding using an ultracentrifuge.

Abstract: The present invention addresses the need to improve the long-term storage stability (i.e. infectivity) of vector formulations. In particular, it has been demonstrated that for adenovirus, the use of bulking agents, cryoprotectants and lyoprotectants imparts desired properties that allow both lyophilized and liquid adenovirus formulations to be stored at 4° C. for up to 6 months and retain an infectivity between 60-100% of the starting infectivity.

Abstract: The present invention addresses the need to improve the yield of adenovirus when grown in cell culture systems. In particular, it has been demonstrated that for adenovirus, the use of infection temperatures lower than 37° C. in a cell culture system results in improved yields of adenovirus. In addition, it has been demonstrated that when host cells are grow in a bioreactor, initiating adenovirus infection by diluting the host cells with fresh media and adenovirus results in improved yield of adenovirus. Methods of adenoviral production and purification using infection temperatures less than 37° C. are disclosed. Methods of adenoviral production and purification wherein the host cells are grown in a bioreactor and adenovirus infection is initiated by diluting the host cells with fresh media and adenovirus are also disclosed.

Abstract: The present invention addresses the need to improve the yields of viral vectors when grown in cell culture systems. In particular, it has been demonstrated that for adenovirus, the use of low-medium perfusion rates in an attached cell culture system provides for improved yields. In other embodiments, the inventors have shown that there is improved Ad-p53 production witrh cells grown in serum-free conditions, and in particular in serum-free suspension culture. Also important to the increase of yields is the use of detergent lysis. Combination of these aspects of the invention permits purification of virus by a single chromatography step that results in purified virus of the same quality as preparations from double CsCl banding using an ultracentrifuge.

Abstract: The present invention addresses the need to improve the yield of adenovirus when grown in cell culture systems. In particular, it has been demonstrated that for adenovirus, the use of infection temperatures lower than 37° C. in a cell culture system results in improved yields of adenovirus. In addition, it has been demonstrated that when host cells are grow in a bioreactor, initiating adenovirus infection by diluting the host cells with fresh media and adenovirus results in improved yield of adenovirus. Methods of adenoviral production and purification using infection temperatures less than 37° C. are disclosed. Methods of adenoviral production and purification wherein the host cells are grown in a bioreactor and adenovirus infection is initiated by diluting the host cells with fresh media and adenovirus are also disclosed.

Abstract: The present invention addresses the need to improve the yields of viral vectors when grown in cell culture systems. In particular, it has been demonstrated that for adenovirus, the use of low-medium perfusion rates in an attached cell culture system provides for improved yields. In other embodiments, the inventors have shown that there is improved Ad-p53 production witrh cells grown in serum-free conditions, and in particular in serum-free suspension culture. Also important to the increase of yields is the use of detergent lysis. Combination of these aspects of the invention permits purification of virus by a single chromatography step that results in purified virus of the same quality as preparations from double CsCl banding using an ultracentrifuge.

Abstract: The present invention addresses the need to improve the long-term storage stability (i.e. infectivity) of vector formulations. In particular, it has been demonstrated that for adenovirus, the use of bulking agents, cryoprotectants and lyoprotectants imparts desired properties that allow both lyophilized and liquid adenovirus formulations to be stored at 4° C. for up to 6 months and retain an infectivity between 60-100% of the starting infectivity.

Abstract: The present invention addresses the need to improve the yields of viral vectors when grown in cell culture systems. In particular, it has been demonstrated that for adenovirus, the use of low-medium perfusion rates in an attached cell culture system provides for improved yields. In other embodiments, the inventors have shown that there is improved Ad-p53 production witrh cells grown in serum-free conditions, and in particular in serum-free suspension culture. Also important to the increase of yields is the use of detergent lysis. Combination of these aspects of the invention permits purification of virus by a single chromatography step that results in purified virus of the same quality as preparations from double CsCl banding using an ultracentrifuge.

Abstract: The present invention addresses the need to improve the yields of viral vectors when grown in cell culture systems. In particular, it has been demonstrated that for adenovirus, the use of low-medium perfusion rates in an attached cell culture system provides for improved yields. In other embodiments, the inventors have shown that there is improved Ad-p53 production witrh cells grown in serum-free conditions, and in particular in serum-free suspension culture. Also important to the increase of yields is the use of detergent lysis. Combination of these aspects of the invention permits purification of virus by a single chromatography step that results in purified virus of the same quality as preparations from double CsCl banding using an ultracentrifuge.

Abstract: The present invention addresses the need to improve the yields of viral vectors when grown in cell culture systems. In particular, it has been demonstrated that for adenovirus, the use of low-medium perfusion rates in an attached cell culture system provides for improved yields. In other embodiments, the inventors have shown that there is improved Ad-p53 production with cells grown in serum-free conditions, and in particular in serum-free suspension culture. Also important to the increase of yields is the use of detergent lysis. Combination of these aspects of the invention permits purification of virus by a single chromatography step that results in purified virus of the same quality as preparations from double CsCl banding using an ultracentrifuge.

Abstract: The present invention addresses the need to improve the long-term storage stability (i.e. infectivity) of vector formulations. In particular, it has been demonstrated that for adenovirus, the use of bulking agents, cryoprotectants and lyoprotectants imparts desired properties that allow both lyophilized and liquid adenovirus formulations to be stored at 4° C. for up to 6 months and retain an infectivity between 60-100% of the starting infectivity.

Abstract: The present invention addresses the need to improve the yields of viral vectors when grown in cell culture systems. In particular, it has been demonstrated that for adenovirus, the use of low-medium perfusion rates in an attached cell culture system provides for improved yields. In other embodiments, the inventors have shown that there is improved Ad-p53 production witrh cells grown in serum-free conditions, and in particular in serum-free suspension culture. Also important to the increase of yields is the use of detergent lysis. Combination of these aspects of the invention permits purification of virus by a single chromatography step that results in purified virus of the same quality as preparations from double CsCl banding using an ultracentrifuge.

Abstract: A method of purifying retroviral vector particles which comprises culturing retroviral vector producer cells which are capable of generating retroviral vector particles, and obtaining a supernatant containing retroviral vector particles from the culture of retroviral vector producer cells. The supernatant is clarified, and then concentrated. The supernatant then is contacted with a precipitation agent, and the supernatant and precipitation agent are centrifuged. A precipitate is recovered, resuspended, and subjected to a high-speed centrifugation. Retroviral particles then are recovered. The above method provides for increased recovery of retroviral vector particles which may be employed in gene therapy.

Abstract: The present invention relates to an efficient method, termed spin transduction, of transducing cells with retroviral vectors. Retroviral particles, suspended in a pharmaceutically acceptable carrier, are contacted with the cells to be transduced, and the mixture is centrifuged for a sufficient period of time to permit transduction. This method leads to a 3- to 15-fold increase in transduction efficiency, depending on the type of cells transduced.

Abstract: A stainless steel column housing is capped with an O-ring sealed cover to form a sealed autoclavable sterile chamber. A pair of stainless steel mesh circular cylindrical concentric inner and outer columns are within the chamber. A bed of porous glass spherical beads are packed in the region between the inner and outer mesh columns. The pH and DO are monitored and controlled while culture medium is continuously supplied to and from the sterile chamber. The outer mesh column forms an outer bulk medium chamber with the housing and the inner mesh column forms an inner bulk medium chamber. A ring sparger bubbles air and CO.sub.2 mixture into the outer bulk medium chamber, the bubbles creating pressure differentials in the bulk medium chambers. These differentials cause radially bulk medium flow through the packed bead bed without pressure gradients in the bed and axial bulk medium recirculation flow in and between the inner and outer bulk medium chambers at their axial ends.