Modified Viral Particles with Immunogenic Properties and Reduced Lipid Content Useful for Treating and Preventing Infectious Diseases
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Abstract
The present invention relates to a method for reducing the occurrence and severity of infectious diseases, especially infectious diseases in which lipid-containing infectious viral organisms are found in biological fluids, such as blood. The present invention employs solvents useful for extracting lipids from the lipid-containing infectious viral organism thereby creating modified viral particles with reduced infectivity and enhanced antigenicity. The present invention provides vaccine compositions, comprising these modified viral particles with reduced infectivity and enhanced antigenicity, optionally combined with a pharmaceutically acceptable carrier or an immunostimulant. The vaccine composition is administered to a patient to provide protection against the lipid-containing infectious viral organism. The vaccine compositions of the present invention include combination vaccines of modified viral particles obtained from one or more strains of a virus and/or one or more types of virus.
103 Citations
91 Claims
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1-69. -69. (canceled)
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70. A method of providing protection in a patient against an infectious hepatitis viral particle comprising the step of:
administering to the patient an effective amount of a vaccine composition comprising at least a partially delipidated hepatitis viral particle having at least one exposed viral antigen that was not exposed in a non-delipidated hepatitis viral particle, wherein the amount is effective to provide a protective effect against infection by the infectious hepatitis viral particle in the patient. - View Dependent Claims (71, 72, 73, 74, 75, 76, 77, 78, 79)
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80. A method for provoking a positive immune response in patient having a plurality of lipid-containing hepatitis viral particles, comprising the steps of:
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obtaining a fluid containing the lipid-containing hepatitis viral particles from the patient; contacting the fluid containing the lipid-containing hepatitis viral particles with a first organic solvent capable of extracting lipid from the lipid-containing hepatitis viral particles; mixing the fluid and the first organic solvent; permitting organic and aqueous phases to separate; collecting the aqueous phase containing modified hepatitis viral particles with reduced lipid content; and introducing the aqueous phase containing the modified hepatitis viral particles with reduced lipid content into the patient wherein the modified hepatitis viral particles with reduced lipid content provoke an immune response in the patient. - View Dependent Claims (81, 82, 83, 84, 85, 86)
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87. A method for treating a hepatitis viral infection in a patient comprising:
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removing blood containing a plurality of lipid-containing infectious hepatitis viral particles from the animal or the human; obtaining plasma from the blood, the plasma containing the lipid-containing infectious hepatitis viral particles; contacting the plasma containing the lipid-containing infectious hepatitis viral particles with a first organic solvent capable of extracting lipid from the lipid-containing infectious hepatitis viral particles to produce modified hepatitis viral particles having reduced lipid content; mixing the plasma and the first organic solvent; permitting organic and aqueous phases to separate; collecting the aqueous phase containing the modified hepatitis viral particles; and introducing the aqueous phase containing the modified hepatitis viral particles into the patient wherein the modified hepatitis viral particles have at least one exposed viral antigen that was not exposed in the plurality of lipid-containing infectious hepatitis viral particles. - View Dependent Claims (88, 89, 90, 91)
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Specification