Compositions and methods for treating aids or cancer by inhibiting the secretion of microparticles
Novel peptides that inhibit the release of microparticles from cells are disclosed. The peptide contains at least one VGFPV motif at the N-terminal and has a length of 10-100 amino acids. Also disclosed is polynucleotide encoding the peptide, expression vectors carrying the polynucleotide, and methods for treating AIDS and tumors using the novel peptides.
1. A method for reducing the formation of virion particles in an HIV-infected cell, comprising:
contacting an HIV-infected cell in a human subject with a peptide containing at least two SEQ ID NO: 1 motifs and having a length of 10-100 amino acids in an amount effective to reduce virion formation in said cell.
2. The method of claim 1 , wherein said peptide comprises at least one SEQ ID NO: 1 motif at the N-terminal end of the peptide.
3. The method of claim 1 , wherein said peptide comprises at least one SEQ ID NO: 1 motif at the C-terminal end of the peptide.
4. The method of claim 1 , wherein said peptide comprises the amino acid sequence of SEQ ID NO: 2.
5. The method of claim 1 , wherein said peptide comprises the amino acid sequence of SEQ ID NO: 3.
6. A method for reducing the formation of virion particles in an HIV-infected cell, comprising:
contacting an HIV-infected cell in a human subject with a polynucleotide encoding a peptide containing at least two SEQ ID NO: 1 motifs and having a length of 10-100 amino acids in an amount effective to reduce virion formation in said cell, wherein said polynucleotide is capable of expressing said peptide in said cell.
7. The method of claim 6 , wherein said peptide comprises the amino acid sequence SEQ ID NO: 2.
8. The method of claim 6 , wherein said peptide comprises the amino acid sequence of SEQ ID NO: 3.
9. The method of claim 6 , wherein said peptide comprises at least one SEQ ID NO: 1 motif at the N-terminal end of the peptide.
10. The method of claim 6 , wherein said peptide comprises at least one SEQ ID NO: 1 motif at the C-terminal end of the peptide.
11. A method for reducing the formation of virion particles in an HIV-infected cell, comprising:
contacting an HIV-infected cell in a human subject with an expression vector comprising a polynucleotide encoding a peptide containing at least two SEQ ID NO: 1 motifs and having a length of 10-100 amino acids in an amount effective to reduce virion formation in said cell, wherein said expression vector is capable of expressing said peptide in said cell.
12. The method of claim 11 , wherein said peptide comprises the amino acid sequence SEQ ID NO: 2.
13. The method of claim 11 , wherein said peptide comprises the amino acid sequence of SEQ ID NO: 3.
14. The method of claim 11 , wherein said peptide comprises at least one SEQ ID NO: 1 motif at the N-terminal end of the peptide.
15. The method of claim 11 , wherein said peptide comprises at least one SEQ ID NO: 1 motif at the C-terminal end of the peptide.
16. The method of claim 11 , wherein said expression vector is a viral vector.
17. The method of claim 11 , wherein said expression vector is a non-viral vector.