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Antimicrobial and Antiviral Compounds and Methods for Their Use

a technology of antiviral compounds and compounds, applied in the field of therapeutics, can solve the problems of difficult control, ineffectiveness of conventional antibiotics, and refractory particulate bacterium treatment with conventional antibiotics

Inactive Publication Date: 2011-06-09
LAKEWOOD AMEDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

These compounds demonstrate increased stability and efficacy against resistant bacterial and viral strains, allowing for reduced antibiotic dosages and prolonged activity, while maintaining non-toxicity and broad-spectrum antimicrobial activity, including effectiveness against gram-positive and gram-negative bacteria, fungi, and viruses.

Problems solved by technology

In addition, there are instances where antibiotic resistance is not an issue, yet a particular bacterium remains refractory to treatment using conventional antibiotics.
Unfortunately, conventional antibiotics are completely ineffective against this organism.
While viruses are structurally amongst the simplest of organisms, they are regarded to be among the most difficult to control and present a formidable challenge for antiviral drug R&D.
These drugs possess a variety of undesirable neurological, metabolic and immunological side-effects.

Method used

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  • Antimicrobial and Antiviral Compounds and Methods for Their Use
  • Antimicrobial and Antiviral Compounds and Methods for Their Use
  • Antimicrobial and Antiviral Compounds and Methods for Their Use

Examples

Experimental program
Comparison scheme
Effect test

example 1

Bacterial Growth Studies in a Burn Model

[0174]Burn wound infection in mice can be established by subcutaneous or topical administration of the bacteria to the sites of the burn. In order to demonstrate the anti-microbial activity of the compounds of the present invention, the ability of such compounds to prevent burn wound infection was studied.

[0175]Six-week old BALB / c female mice were obtained from the mouse breeding colony at DRES, with breeding pairs purchased from Charles River Canada Ltd. (St. Constant, Quebec, Canada). The use of animals described in this study was approved by DRES Animal Care Committee. Care and handling of animals described in this study followed guidelines set out the Canadian Council on Animal Care.

[0176]Pseudomonas aeruginosa (Strain Utah 4) was initially cultured on the tripticase soya broth, aliquotted and frozen at −70° C. Prior to use, aliquots were thawed and diluted serially in sterile PBS just prior to administration into animals. To ensure viabil...

example 2

Subcutaneous Treatment with a Protonated Monomer

[0179]To determine the effectiveness of protonated compounds for the treatment of burn wound infection, mice were subcutaneously infected with 5 LD50 of P. aeruginosa as described above. Mice were then treated in the following manner. For treatment of systemic infection (infection by subcutaneous injection of the bacteria), mice were treated at 2 and 8 hrs post infection. Three groups of mice were treated with protonated Nu-3. Group 1 received a subcutaneous injection of 100 μl 35 mg / ml protonated monomer; Group 2 received a subcutaneous injection of 17.5 mg / ml protonated injection; and group three received no monomer. All (5 out of 5) treated Group 1 animals survived, 2 / 5 animals of group 2 survived, and no control animals survived the burn infection.

[0180]The bacterial load was determined using the blood and, organs of experimental animals. Blood, spleens, livers and the burnt skins were aseptically removed. The blood (100 μl) was se...

example 3

Treatment of Tinea Pedis

[0184]A 75 year old male with diabetes presented with an acute case of tinea pedis. This infection had been treated with conventional antifungals for a period of over a month with little progress made in clearing up this fungal infection. Treatment of the site of tinea pedis was initiated using a topical solution of Nu-3 at a concentration of 31 A260 / ml. Treatment of the area continued once a day for three days. At the end of the three-day period, the infection appeared to be completely eradicated.

[0185]The results of this experiment indicate that the compounds of the present invention were effective for the treatment of tinea pedis.

Example 4

Antimicrobial Activity of Compound Nu-4

[0186]The antimicrobial activity of the compounds of the present invention was further demonstrated by incubating various microorganisms in the presence of Compound Nu-4 of the present invention. For such incubations, a stock solution of Nu-4 (12.7 mM) was diluted using 5 sequential ...

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PUM

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Abstract

The present invention provides protonated compounds having antiviral and antimicrobial activity. The invention also provides antimicrobial compositions comprising protonated compounds of the invention. The protonated compounds of the invention provide efficacious antimicrobial activity against resistant strains of bacteria and opportunistic fungi. The invention also provides antiviral compositions comprising compounds of the invention. Viruses that may be treated by compositions of the invention include, but are not limited to, HIV, HSV, CMV, HBV, HCV and influenza virus.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation-in-part of U.S. patent application Ser. No. 10 / 937,094, filed Sep. 8, 2004 which is a continuation of U.S. application Ser. No. 09 / 847,654, filed on May 3, 2001, which is in turn a continuation-in-part of U.S. patent application Ser. No. 09 / 281,858 filed Mar. 31, 1999, which application is a continuation-in-part of U.S. patent application Ser. No. 09 / 222,009 filed Dec. 30, 1998, all of which are herein incorporated by reference in their entirety.FIELD OF THE INVENTION[0002]The invention relates generally to the field of therapeutics used to treat bacterial, fungal and viral infections. The invention relates generally to the field of protonated chemicals and specifically to protonated compounds used as pH stabilizers and therapeutics containing such molecules.BACKGROUND OF THE INVENTION[0003]Pathogenic bacteria responsible for infectious diseases were once thought to be controllable through the use of a b...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K9/127A61K31/7072A61K31/7028C07H19/10C07H11/04A61P31/04A61P31/10A61P31/12A61P31/18A61P31/16A61P31/20A61P31/14A61P31/22B82Y5/00
CPCA61K9/0014A61K9/1271C07H19/10A61K31/7076C07H11/04A61K31/7072A61P31/04A61P31/10A61P31/12A61P31/14A61P31/16A61P31/18A61P31/20A61P31/22A61P35/00Y02A50/30
Inventor DALE, RODERIC M.K.
Owner LAKEWOOD AMEDEX
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