Provided is an M1 virus. Further provided are a series of uses of said virus. The uses include, but are not limited to, viral vectors, anti-tumor agents, and pharmaceutical compositions. Said virus can effectively inhibit the growth of various tumor cells, and at the same time, has tumor targeting properties and is non-toxic to normal cells. Said virus can be administrated by means of intravenous injection, having operational convenience.

A vaccine composition for prophylaxis and treatment of Chikungunya virus infections is disclosed which is capable of conferring immunity against any genotypic variants of the Chikungunya virus. More particularly the invention discloses particular nucleotide sequences and their translated proteins thereof, which may be expressed as Virus Like Particles which for use as a vaccine antigens against Chikungunya virus infections. The compositions disclosed in this invention are also protective against any genotypic variants of the Chikungunya virus which may be propagated by any suitable vector of the disease including Aedis albopictus and Aedis aegypti.

Methods and compositions are provided for delivery of a polynucleotide encoding a gene of interest, typically an antigen, to a dendritic cell (DC). The virus envelope comprises a DC-SIGN specific targeting molecule. The methods and related compositions can be used to treat patients suffering from a wide range of conditions, including infection, such as HIV/AIDS, and various types of cancers.

Compositions and methods for treating a viral infection may comprise use of a viral recognition-site inhibiting agent composition. A viral recognition-site inhibiting agent composition of the present disclosure may substantially inhibit, reduce, or block virus bind to the LDLRAD3 host receptor and reduces the infectivity of a virus for a host cell. A method of treating a viral infection may comprise administering a composition comprising a viral recognition-site inhibiting agent of the present disclosure, to a subject and reducing the infectivity of the virus for a host cell of the subject. The compositions may be administered via intranasal or systemic administration to treat or prevent a viral infection, for example an alphavirus infection.

The present disclosure relates to methods for transiently activating temperature-sensitive agents in one or more cells, for example by contacting one or more cells with a temperature-sensitive agent and transiently incubating the cells at a permissive temperature for inducing an activity of the temperature-sensitive agent in the cells. Additionally, the present disclosure relates to methods of contacting one or more cells in a subject with a temperature-sensitive agent and then lowering the subject's core body temperature to a permissive temperature for inducing an activity of the temperature-sensitive agent in the cells. The disclosure also relates to methods of contacting one or more cells in a subject with a temperature-sensitive agent, maintaining the subject's surface body temperature at a permissive temperature for inducing an activity of the temperature-sensitive agent in the cells. Further disclosed are methods of treating a subject with a temperature-sensitive therapeutic agent.

In various embodiments immunogenic nanoparticles are provided that are capable of raising an immune response directed against one or more viral proteins and/or protein fragments. In certain embodiments the immunogenic nanoparticles raise an immune response directed against a virus (e.g., SARS-CoV-2 (2019-nCoV), SARS-CoV-2, and MERS-CoV, and the like). In certain embodiments the immunogenic nanoparticles comprise a nanoparticle formed from one or more biocompatible polymer(s), one or more viral proteins or fragments thereof encapsulated within or attached to the biocompatible polymer(s) where the viral protein or fragment thereof comprises an antigen to which an immune response is to be induced by administration of the immunogenic nanoparticle to a mammal and where the immunogenic nanoparticle further comprises an adjuvant (e.g., a STING agonist).

The present invention relates to a process for producing an immunogenic live attenuated Chikungunya virus, as well as pharmaceutical compositions comprising the same.

The present invention provides novel compositions and methods for inhibiting tumor growth, treating cancer, and/or inducing immune responses. Such compositions and methods induce an immune response for the treatment of a variety of diseases including cancer.

The present invention includes composition and methods for making multivalent vaccines for immunization against Flavivirus and/or arboviruses including a multivalent Virus Like Particles (VLP) and mixtures thereof, the method comprising: method of making a Flavivirus and/or arboviruses Virus Like Particles (VLP) comprising: inserting two or more nucleic acids that encode at least one Flavivirus protein into a lentiviral backbone vector; generating a lentivirus by transfecting a first cell line with the lentiviral backbone vector and isolating the lentivirus therefrom; transducing a second cell line with the lentivirus; culturing the transduced cell line under conditions in which the multivalent Flavivirus Virus Like Particles (VLP) are released from the cell line; and isolating the Flavivirus Virus Like Particles (VLP) from a culture supernatant, wherein a cell line makes a virus-specific VLP, and the VLPs are purified and then mixed in different combinations to make the multivalent vaccine.

The present disclosure provides a system for the expression of target protein in conjunction with enhancer protein. The enhancer protein may be a viral protein that blocks nucleocytoplasmic transport. Also provided are polynucleotides, vectors, and cells comprising target protein and enhancer protein nucleic acid sequences.