Abstract: A polypeptide-coupled small molecule compound and its antiviral applications are provided. The polypeptide-coupled small molecule compound is obtained by linking a polypeptide with a sequence X?nLXGG and a small molecule compound capable of inhibiting activity of papain-like protease (PLpro) of coronavirus through a chemical bond. The polypeptide with the sequence X?nLXGG is a polypeptide with a sequence LXGG at its carboxyl terminal, X and X? are independently any amino acid, and n is an integer between 1-50. The structure of the small molecule compound capable of inhibiting the activity of PLpro contains an amino group or a hydroxyl group. The polypeptide-coupled small molecule compound can inhibit the PLpro of SARS-CoV-2 in a targeted manner, thereby inhibiting the polyprotein cleavage of coronavirus in the host, and achieving the purpose of inhibiting the replication of coronavirus in the host. It has the advantages of synergistic inhibition, low cytotoxicity and favorable solubility.

Abstract: The present disclosure provides methods, compounds and compositions that are relevant to DNA-repair and DNA-repair proteins such as tyrosyl-DNA phosphodiesterase 1 (TDP1) and type I topoisomerase (TOP1).

Abstract: A composition for induction of a pluripotent stem cell including a microRNA and a combination of small-molecule compounds. The microRNA includes one of the miR-290 family members, or a microRNA sequence having at least 90% identity with a sequence of one of the miR-290 family members. The combination of small-molecule compounds includes a histone deacetylase inhibitor, a mitogen-activated extracellular signal-regulated kinase inhibitor, a glycogen synthase kinase-3 inhibitor, a transforming growth factor beta receptor 1 (TGF-?R1) inhibitor, and an inhibitor of histone demethylase.

Abstract: A polypeptide-coupled small molecule compound and its antiviral applications are provided. The polypeptide-coupled small molecule compound is obtained by linking a polypeptide with a sequence X?nLXGG and a small molecule compound capable of inhibiting activity of papain-like protease (PLpro) of coronavirus through a chemical bond. The polypeptide with the sequence X?nLXGG is a polypeptide with a sequence LXGG at its carboxyl terminal, X and X? are independently any amino acid, and n is an integer between 1-50. The structure of the small molecule compound capable of inhibiting the activity of PLpro contains an amino group or a hydroxyl group. The polypeptide-coupled small molecule compound can inhibit the PLpro of SARS-CoV-2 in a targeted manner, thereby inhibiting the polyprotein cleavage of coronavirus in the host, and achieving the purpose of inhibiting the replication of coronavirus in the host. It has the advantages of synergistic inhibition, low cytotoxicity and favorable solubility.

Abstract: A composition for induction of a pluripotent stem cell includes a microRNA and a combination of small-molecule compounds. The combination of small-molecule compounds includes a histone deacetylase inhibitor, a mitogen-activated extracellular signal-regulated kinase inhibitor, a glycogen synthase kinase-3 inhibitor, a transforming growth factor beta receptor 1 (TGF-?R1) inhibitor, an inhibitor of histone demethylase.