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Integrase inhibiting peptide and its application in preparing AIDS-treating medicine

A technology for inhibiting peptides and integrases, applied in the direction of peptides, antiviral agents, etc., can solve problems such as peripheral nerve diseases and neutropenia

Inactive Publication Date: 2009-09-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the classic AIDS (AIDS) treatment drugs included: nucleoside reverse transcriptase inhibitors, non-nucleoside reverse transcriptase inhibitors and protease inhibitors; Drug resistance, and long-term use of these three types of drugs will also cause side effects such as anemia, neutropenia, myopathy, peripheral nerve disease, etc.

Method used

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  • Integrase inhibiting peptide and its application in preparing AIDS-treating medicine
  • Integrase inhibiting peptide and its application in preparing AIDS-treating medicine
  • Integrase inhibiting peptide and its application in preparing AIDS-treating medicine

Examples

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Embodiment 1

[0017] Example 1: Using recombinantly expressed HIV-1 integrase as the target protein, positive phage clones were obtained by screening with phage display technology.

[0018] Phage display technology uses molecular biology techniques to clone a set of synthetic oligonucleotide fragments of a certain length into a specific expression vector, so that the expression product is presented on the surface of the phage in the form of a fusion protein. Since the peptide library contains all possible amino acid sequences of small peptides of this length, each phage surface protein presents one of the peptides, which is convenient for screening; the screened phage can be amplified by bacteria. Infect E. coli with the phage peptide library, and the random oligonucleotide fragments recombined into the phage are replicated in E. coli and expressed in the coat protein of the phage. Then, coat the target protein on the microtiter plate. After mixing the phage peptide library with the target...

Embodiment 2

[0021] Embodiment 2: Competitive inhibition ELISA experiment of synthetic heptapeptide

[0022] Test method: Coat 96-well plate with 100ul / well integrase, overnight at 4°C, block with 5% BSA at 37°C for 2h. TPSHSSR at different concentrations of 0, 16.25, 32.5, 65, 130, 260, and 520 μmol / L; The phages mix and compete with the coated integrase for binding. Calculate the phage binding rate: binding rate%=1—(A 450 —A' 450 ) / A 450 ×100%; where A 450 Absorbance at 450nm wavelength without inhibitor, A' 450 Absorbance at a wavelength of 450 nm after adding the inhibitor.

[0023] Test results: With the increase of the added heptapeptide, the binding rate of the phage gradually decreased, that is, the competitive inhibition rate of the corresponding polypeptide increased, see figure 1 , with the increase of the concentration of the synthetic heptapeptide, the binding rate of the corresponding display phage to the integrase decreased. The results indicated that these two pepti...

Embodiment 3

[0024] Embodiment 3: Synthetic heptapeptide inhibition integrase integration activity experiment

[0025] Test method: Firstly, the plasmid pBluescript SK(+) was digested with Sma I at 30°C overnight, and the product was subjected to 1% agarose gel electrophoresis, and the digested product was recovered by cutting the gel, and dissolved in the coating solution (20mmol / L Tris-HCl pH7.4, 20mmol / L EDTA, 2mol / L NaCl), the final concentration of DNA is 2ug / ml; use it to coat a 96-well plate, 100μ1 per well for 2h at 37°C, or overnight at 4°C. The donor DNA was annealed to two single-stranded oligonucleotide chains (UV5BR: 5'-Biotin-GTGTGGAAAATCTCTAGCAGT-3', UV5: 5'-ACTGCTAGAGATTTTCCACAC-3') synthesized by Shanghai Sangon Bioengineering Technology Service Co., Ltd. become. VU5BR / VU5 was mixed in TEN buffer (10mmol / L Tris-HCl pH8.0, 1mmol / L EDTA pH8.0, 0.1mol / L NaCl) at a ratio of 1:1.2, heated at 80°C for 3min, and slowly cooled to room temperature. Store in a 4°C refrigerator. T...

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Abstract

The invention provides an integrase inhibitory peptide, which is one of seven polypeptide organic compounds selected from a, b, c, d, e, f, and g, soluble in water, and connected by peptide bonds between amino acids, capable of inhibiting HIV-1 integrase activity, the molecular weights are: 974.3, 770.8, 822.9, 830.9, 849.0, 789.8, 788.8. The polypeptide organic compound of the invention can inhibit the activity of HIV-1 integrase, interrupt the proliferation of virus DNA in host cells and its life cycle, and can be used in the preparation of drugs for treating AIDS. At the same time, it can also be used for further research on the structure, mechanism of action of integrase and AIDS treatment drugs.

Description

technical field [0001] The invention belongs to organic compounds, and mainly relates to polypeptide organic compounds, especially artificially synthesized polypeptide organic compounds and their application in the preparation of drugs for treating AIDS. technical background [0002] The process of viral DNA integration into host cell chromosomal DNA is an extremely important link in the life cycle of retroviruses, and integrase (IN) plays a key role in this link. In the past, the classic AIDS (AIDS) treatment drugs included: nucleoside reverse transcriptase inhibitors, non-nucleoside reverse transcriptase inhibitors and protease inhibitors; Drug resistance, and long-term use of these three types of drugs will also cause side effects such as anemia, neutropenia, myopathy, and peripheral nerve disease. Therefore, in order to overcome the existing problems in the treatment of AIDS, people began to search for drugs that act on new target molecules, and drugs that inhibit the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07K7/06A61K38/08A61P31/18
Inventor 詹金彪邹媛黄建松冯微宏
Owner ZHEJIANG UNIV
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