A modified coxsackievirus showing improved safety and/or aggressiveness to be used for oncolytic virotherapy is provided. A modified coxsackievirus showing tissue-specific suppression of proliferation and comprising a mutated genome consisting of the genome of coxsackievirus B3 wild-type (CVB3-WT) inserted with at least one polynucleotide consisting of a target sequence of tissue-specific microRNA (miRNA) is provided. The mutated genome is preferably further inserted with the region encoding GM-CSF in an expressible form.

Methods of inhibiting or reducing tumor growth are disclosed. A composition containing at least one selected oncolytic virus is administered within a tumor of a patient. The virus kills cancerous cells and induces a systemic and lasting anti-tumor immunity that is also compatible with other cancer treatments. Also disclosed are methods of creating synthetic viruses for targeting cancerous tumors.

Provided is a Coxsackievirus A6 (CVA6) strain CVA6-KM-J33 and use thereof, and belongs to the technical field of biomedicine. The present invention provides a CVA6 strain CVA6-KM-J33, which belongs to a CVA6 virus. In the present invention, the strain CVA6-KM-J33 is susceptible to KMB17 cells and can achieve a relatively high titer. The strain has strong virulence, high pathogenicity and lethality to suckling mice, and desirable immunogenicity, and is a highly effective virus strain for CVA6 vaccine development. This strain can be used for immunogenicity evaluation or protective evaluation of CVA6 vaccine to improve the accuracy and reproducibility of vaccine immunogenicity evaluation. This strain can also be used to prepare animal models of Coxsackievirus (CV) infection, and exhibits desirable application prospects.

The present invention relates to previously undescribed viruses that are associated with significant expansion of the virome, immunodeficiency, and enteropathy during lentiviral infection. The invention also provides methods to detect acquired immune deficiency syndrome (AIDS) or AIDS progression in a subject, methods to diagnose immunodeficiency or enteropathy in a subject, and methods to identify a therapeutic agent to treat the same.

Methods of inhibiting or reducing tumor growth are disclosed. A composition containing at least one selected oncolytic virus is administered within a tumor of a patient. The virus kills cancerous cells and induces a systemic and lasting anti-tumor immunity that is also compatible with other cancer treatments. Also disclosed are methods of creating synthetic viruses for targeting cancerous tumors.

Methods of inhibiting or reducing tumor growth are disclosed. A composition containing at least one selected oncolytic virus is administered within a tumor of a patient. The virus kills cancerous cells and induces a systemic and lasting anti-tumor immunity that is also compatible with other cancer treatments. Also disclosed are methods of creating synthetic viruses for targeting cancerous tumors.