Abstract: Provided herein are nanoparticles comprising a polyplex core comprising one or more pH-responsive polymers and one or more anionic immune adjuvants, wherein each pH-responsive polymer comprises ionizable amine groups; and a shell of bacterial cell membrane components at least partially coating the polyplex core, wherein the bacterial cell membrane components comprise TLR 2 and/or TLR 4 agonists. Also provided are methods of stimulating an immune response in a mammal using the nanoparticle.

Abstract: A method of treating a malignant solid tumor in a subject is disclosed herein. The method includes the steps of administering to the subject an immunomodulatory dose of a radiohalogenated compound that is differentially taken up by and retained within malignant solid tumor tissue, and performing in situ tumor vaccination in the subject by intratumorally injecting into (or treating via a separate method) at least one of the malignant solid tumors a composition that includes one or more agents capable of stimulating specific immune cells within the tumor microenvironment. In certain exemplary embodiments, the radiohalogenated compound has the formula: wherein R1 is a radioactive halogen isotope, n is 18 and R2 is —N+(CH3)3.

Abstract: A method of treating a malignant solid tumor in a subject is disclosed herein. The method includes the steps of administering to the subject an immunomodulatory dose of a radiohalogenated compound that is differentially taken up by and retained within malignant solid tumor tissue, and performing in situ tumor vaccination in the subject by intratumorally injecting into (or treating via a separate method) at least one of the malignant solid tumors a composition that includes one or more agents capable of stimulating specific immune cells within the tumor microenvironment. In certain exemplary embodiments, the radiohalogenated compound has the formula: wherein R1 is a radioactive halogen isotope, n is 18 and R2 is —N+(CH3)3.

Abstract: Provided herein are nanoparticles comprising a polyplex core comprising one or more pH-responsive polymers and one or more anionic immune adjuvants, wherein each pH-responsive polymer comprises ionizable amine groups; and a shell of bacterial cell membrane components at least partially coating the polyplex core, wherein the bacterial cell membrane components comprise TLR 2 and/or TLR 4 agonists. Also provided are methods of stimulating an immune response in a mammal using the nanoparticle.

Abstract: A method of treating a malignant solid tumor in a subject is disclosed herein. The method includes the steps of administering to the subject an immunomodulatory dose of a radiohalogenated compound that is differentially taken up by and retained within malignant solid tumor tissue, and performing in situ tumor vaccination in the subject by intratumorally injecting into (or treating via a separate method) at least one of the malignant solid tumors a composition that includes one or more agents capable of stimulating specific immune cells within the tumor microenvironment. In certain exemplary embodiments, the radiohalogenated compound has the formula: wherein R1 is a radioactive halogen isotope, n is 18 and R2 is —N+(CH3)3.

Abstract: A cellular method for typing lymphocyte defined human leukocyte antigens by utilizing human blood leukocytes which have been sensitized to proliferatively respond to the secondary stimulus of the leukocyte antigens to which they have been sensitized. The sensitization is accomplished by incubating, in vitro, in a mixed leukocyte culture, the leukocytes to be sensitized with leukocytes differing by only a single major histocompatibility complex haplotype or a single HLA-D antigenic determinant.