Composition for photodynamic reaction containing extract of Ligularia fischeri as an effective ingredient, antimicrobial, antifungal and sterilization composition including the same, and sterilization method using the composition for photodynamic reaction

Patent metadata

Field	Value
Publication number	US-12433925-B2
Application number	US-202117354380-A
Country	US
Kind code	B2
Filing date	Jun 22, 2021
Priority date	Jun 23, 2020
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

Provided are methods of reducing and killing bacteria and fungi, and photodynamic treatment methods and sterilization methods using the methods of reducing and killing bacteria and fungi. The method of reducing and killing bacteria and fungi includes bringing a composition including a Ligularia fischeri extract or a fraction thereof as an active ingredient into contact with cells or tissues of a subject and irradiating cells or tissues of a subject in contact with the composition with an absorbable wavelength of excitation light.

First claim

What is claimed is:

1. A method of reducing and killing bacteria and fungi, the method comprising:
bringing a composition including a Ligularia fischeri ethanol extract or an ethanolic fraction thereof as an active ingredient into contact with cells or tissues of a subject;
irradiating cells or tissues of a subject in contact with the composition with an absorbable wavelength of excitation light; and
irradiating for 1 minute to 15 minutes using a light-emitting diode (LED) lamp with a red light wavelength of 660 nm at an intensity of 1 W/m 2 to 600±20 W/m 2 .

2. The method of claim 1 , wherein the LED lamp emits light originating from an LED mask.

3. The method of claim 1 , wherein the Ligularia fischeri extract is extracted and filtered by:
adding, to dry, pulverized Ligularia fischeri , an ethanolic solvent in an amount 5 to 10 times the dry, pulverized Ligularia fischeri , to form a mixture,
extracting by refluxing the mixture at room temperature for 1 to 10 hours, and
filtering with a filter paper.

4. The method of claim 1 , wherein the composition further comprises one or more carriers or additives selected from: lactose, corn, starch, soybean oil, microcrystalline cellulose, mannitol, magnesium stearate, talc, polyvinylpyrrolidone, hydroxypropylcellulose, carboxymethylcellulose calcium, sodium starch glycolate, polacrilin potassium, crospovidone, white sugar, fructose, sorbitol, aspartame, sodium carboxymethylcellulose, beta-cyclodextrin, white lead, xanthan gum, methyl paraoxybenzoate, propyl paraoxybenzoate, and potassium sorbate.

5. The method of claim 1 , wherein the bacteria is selected from Staphylococcus aureus , methicillin-resistant Staphylococcus aureus (MRSA), Staphylococcus epidermidis, Streptococcus pneumoniae, Streptococcus mutans, Streptococcus pyogenes, Enterococcus faecalis, Enterococcus faecium, Propionibacterium acnes, Cutibacterium acnes, Bacillus subtilis, Clostridioides difficile, Clostridium innocuum, Lactobacillus, Bifidobacterium, Eggerthella, Escherichia coli, Pseudomonas aeruginosa, Neisseria gonorrhoeae, Chlamydia trachomatis, Yersinia pestis, Klebsiella pneumoniae, Legionella pneumophila, Proteus mirabilis, Enterobacter cloacae, Serratia marcescens, Helicobacter pylori, Salmonella enteritidis, Salmonella typhimurium, Acinetobacter baumannii, Vibrio cholera, Porphyromonas gingivalis, Prevotella intermedia, Tannerella forsythia, Treponema denticola, Fusobacterium nucleatum, Aggregatibacter actinomycetemcomitans , and Aeromonas hydrophila.

6. The method of claim 1 , wherein the fungi is selected from Candida species, Candida albicans, Aspergillus fumigatus, Aspergillus flavus, Cryptococcus neoformans, Histoplasma capsulatum, Pneumocystis jirovecii, Stachybotrys chartarum, Trichophyton rubrum, Trichophyton mentagrophytes, Epidermophyton floccosum, Microsporum gypseum, Trichophyton, Microsporum , and Epidermophyton.

7. A photodynamic treatment method using the method of claim 1 .

8. The photodynamic treatment method of claim 7 , wherein the photodynamic treatment method is used to treat dermatoses, acne, pneumonia, sinusitis, urethritis, prostatitis, sepsis, bacteremia, burn infections, wound infections, otitis externa, otitis media, folliculitis, keratitis, atopic dermatitis, endophthalmitis, neopharitis, meningitis, brain tumors, endothelia, endocarditis, vaginitis, dental cariesis, periodontitis, periodontal disease, colitis, enterobacterial infections, or oral bacterial infections.

9. A sterilization method comprising:
bringing a composition including Ligularia fischeri or an ethanolic fraction thereof as an active ingredient into contact with food, fruit, meat, fresh meat, water, a nutrient solution, a plant, a crop, a container, a packaging material, or an appliance;
irradiating for 1 minute to 15 minutes using a red light-emitting diode (LED) lamp the food, fruit, meat, fresh meat, water, nutrient solution, container, packaging material, or appliance, which is in contact with the composition, with an absorbable wavelength of excitation light having a wavelength of 660 nm at an intensity of 1 W/m 2 to 600±20 W/m 2 ; and
reducing and killing bacteria and fungi on the food, fruit, meat, fresh meat, water, nutrient solution, plant, crop, container, packaging material, or appliance irradiated by the excitation light.

10. The sterilization method of claim 9 , wherein the Ligularia fischeri extract is extracted and filtered by adding, to dry, pulverized Ligularia fischeri , an ethanolic solvent thereof in an amount 5 to 10 times the dry, pulverized Ligularia fischeri , to form a mixture, and refluxing the mixture at room temperature for 1 to 10 hours.

11. The sterilization method of claim 9 , wherein the method is used to sterilize cosmetic containers, food packaging materials, food storage containers, foods, fruits, meats, fresh meat, water, vegetable cultures, horticultural nutrient solutions, plants, crops, toilet equipment, toiletry equipment, sanitary equipment, toothbrushes, combs, scissors, swabs, razors, earplugs, needles, needles for acupuncture, nail clippers, forceps, or kitchen equipment.

Assignees

• Korea Inst Sci & Tech

Inventors

• Kang Kyungsu
• Kwon Jae Young
• Kwon Hak Cheol
• Kim Jin Chul
• Park Jin Soo
• Hwang Ho Seong
• Alam Seemi Tasnim

Classifications

• A61L2103/15

  Laboratory, medical or dentistry appliances, e.g. catheters or sharps · CPC title

• A61L2/084

  Visible light · CPC title

• A61L2/10

  Ultraviolet [UV] radiation · CPC title

• A61L2/088

  using photocatalysts or photosensitisers · CPC title

• A23B2/733

  Compounds of undetermined constitution obtained from animals or plants · CPC title