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Targeted delivery of drugs for treatment of viral infections

A virus infection, antiviral drug technology, applied in the field of cells stressed by virus infection, can solve problems such as drug resistance

Inactive Publication Date: 2008-03-05
FAULK PHARMA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another approach involves inhibitors of proteases involved in the processing of gag and gag-pol polyproteins during virion maturation (Gulnik et al., Vit & Hormones. 2000;58:213), but treatment with protease inhibitors also frequently Medicinal properties (Olsen et al., JBiol Chem 1999;274:23699)

Method used

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  • Targeted delivery of drugs for treatment of viral infections
  • Targeted delivery of drugs for treatment of viral infections
  • Targeted delivery of drugs for treatment of viral infections

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0030] According to the stoichiometric amount, the only one amino group of doxorubicin (DOX), that is, the reaction of one of the two reactive groups of the 3'-amino group and glutaraldehyde (GLU), is carried out with a predetermined molecular ratio, basically Large-scale synthesis of a homogeneous transferrin-doxorubicin conjugate. Therefore, the first step is to add DOX in saline solution dropwise to GLU in saline solution containing a solvent such as DMSO or other suitable cryoprotectants such that the final molar ratio of DOX and GLU is 1:1. The resulting DOX-GLU solution was stirred at room temperature in the dark for 3 hours.

[0031] In the above reaction, the molar numbers of DOX and GLU are equal, so that there is neither free DOX nor free GLU in the final obtained DOX-GLU solution. However, if one molecule of GLU and two molecules of DOX react to form DOX-GLU-DoX, there may be free GLU in the solution, but by adding monovalent DOX dropwise to the divalent GLU soluti...

Embodiment 1

[0050] Preparation of homogeneous transferrin-doxorubicin conjugates

[0051] According to the stoichiometric amount, utilize only one amino group of doxorubicin (DOX), that is, one of the two reactive groups of the 3′-amino group and glutaraldehyde (GLU), to react with a predetermined molecular ratio, basically Large-scale synthesis of homogeneous transferrin-doxorubicin conjugates. Therefore, the first step is to add DLU dropwise into DMSO while cooling with an ice-water bath. Next, the DOX in saline solution was added dropwise to the GLU+DMSO in saline solution so that the final molar ratio of DOX and GLU was 1:1. The resulting DOX-GLU solution was stirred at room temperature in the dark for 3 hours.

[0052] In the above reaction, the molar numbers of DOX and GLU are equal, so that there is neither free DOX nor free GLU in the final obtained DOX-GLU solution. However, if one molecule of GLU reacts with two molecules of DOX to form DOX-GLU-DOX, free GLU may exist in the ...

Embodiment 2

[0061] antiviral activity

[0062] The present invention was studied for its efficacy against different viruses. These viruses include cytomegalovirus (CMV), hepatitis B virus (HBV) and HIV. It turned out to be particularly effective against the HIV virus.

[0063] For example, as shown in Figure 1, a dose-response curve for the inhibition of ROJO strain of HIV-1 virus in human blood cells was obtained using TR-DOX conjugates. In the laboratory test system, the TR-DOX conjugate has a strong effect on the AIDS virus, and the concentration taken suggests that the TR-DOX conjugate can be used as an effective drug for treating HIV in AIDS patients.

[0064] Similarly, Figure 2 shows dose-response curves of hepatitis B virus (HBV)-infected human liver cells exposed to increasing concentrations of transferrin-doxorubicin (TR-DOX) conjugates. Likewise, it has been found that very low concentrations of TR-DOX conjugates can substantially completely inhibit HBV.

[0065] Finally, t...

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Abstract

Conjugates of transferrin or transcobalamin with anti-viral agents are useful in the treatment of viral infections. Suitable anti-viral agents include apoptosis inducing compounds, compounds which inhibit the replication of the virus, a cytotoxic antibiotic, an alkylating agent, a plant toxin, and a bacterial mutant toxin. Transferrin or transcobalamin is preferably coupled to the anti-viral agent by means of glutaraldehyde.

Description

technical field [0001] The present invention relates generally to the field of bioactive materials. More specifically, the bioactive materials involved in the present invention are suitable for the treatment of stressed cells, including human cells, especially cells stressed by viral infection. Background technique [0002] Two common problems associated with drugs during treatment are drug toxicity and drug resistance, which debilitates the patient; drug resistance magnifies the problem of drug toxicity by requiring larger doses of the drug, and drug resistance. This often results in death. One approach to address drug toxicity is to target the drug only to the diseased cells. Many researchers are working on developing antibodies for drug delivery and have made promising progress. But antibodies are not without their problems. For example, antibodies often bind to normal tissue, and they can also damage blood vessels (as in blood leak syndrome) or cause severe allergic r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K38/00A61K39/12A61K39/29A61K39/245C12N15/86A61P31/12C12Q1/06A61K31/519A61K31/704A61K38/45A61K38/46A61K45/00A61K47/42A61K47/48A61P1/16A61P31/18A61P31/22C12Q1/70
CPCA61K47/483A61K31/00A61K38/00A61K45/06A61K47/644A61P1/16A61P31/00A61P31/12A61P31/18A61P31/22A61P43/00
Inventor 佩奇·W.·福克
Owner FAULK PHARMA INC
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