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Cosmetic preparation with anisic acid and levulinic acid with selective antimicrobial activity

An anti-microbial, levulinic acid technology, applied in the field of cosmetics and dermatological preparations, can solve the problems of changing the composition of skin flora, unclear and other problems, and achieve the effect of high antimicrobial selectivity

Pending Publication Date: 2022-05-27
BEIERSDORF AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although anisic acid and levulinic acid have been widely used for the preservation of cosmetics, the use of these substances to target changes in the composition of the skin microbiota has so far been unknown

Method used

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  • Cosmetic preparation with anisic acid and levulinic acid with selective antimicrobial activity
  • Cosmetic preparation with anisic acid and levulinic acid with selective antimicrobial activity
  • Cosmetic preparation with anisic acid and levulinic acid with selective antimicrobial activity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: Preparation and Growth Experiment of Bacterial Suspension

[0034] Staphylococcus epidermidis (DSM 1798) was removed from cryovials (EN 12353), spread on CASO agar plates and incubated at 37°C for 24 hours. Then the second generation was created. 10 ml of BHI medium and 5 g of glass beads (4 mm in diameter) were inoculated with the second passage and shaken for 3 minutes. Thereafter, the batch was adjusted to an OD600 of 0.1 and then diluted 1:10 with diluent. The bacterial suspension was then used for growth assays.

[0035] Test - Growth Assay for Staphylococcus epidermidis

[0036] Add 10 μL of bacterial suspension to each well of a 24-well plate and dry completely (at least 45 min under a sterile bench). After drying, 10 mg of the formulation to be investigated (see Table 1) was pipetted and distributed in the wells by means of a T-squeegee. The control group remained untreated. Plates were stored uncovered in a wet incubator at 37°C and 90% air hum...

Embodiment 2

[0046] Example 2: ATA test

[0047] The ATA test is used to determine the antibacterial effect of cosmetic preparations after twice daily use. The duration of the test is usually 1 week. Application of the test formulations and measurement of activity occurred on the relevant part of the consumer, ie the cheeks. The target amount is the bacterial count of aerobic and anaerobic bacteria.

[0048] All subjects were pretreated for 3 days with the indicated wash gels. After rinsing the cheeks, "Test Formulation 5" described in Table 1 was applied according to the directions. It is then applied via a Floq swab. Apply 3x10 in a defined pattern on a large 5cm x 5cm area of ​​the cheek. smeared patterns such as image 3 shown. During the sampling cycle, the Floq swab was soaked in rinse buffer, and the swab remained in the rinse buffer after the third sampling. The solution was diluted directly and plated on 2 agar plates per sample by spiral plate. The application is then re...

Embodiment 3

[0050] Example 3: Suspension Test

[0051] The effect of the formulations according to the invention was further investigated in suspension tests with Staphylococcus epidermidis and Dermatobacter acnes. Glycerol stock cultures of Staphylococcus epidermidis (DSM 1798) and Dermatobacter acnes (DSM 1897) established according to European Standard 12353 were stored in a refrigerator at 5°C. First passages were prepared from these liquid stock cultures. Here the corresponding cultures are spread on agar plates (Dermobacterium acnes: COST agar, Staphylococcus epidermidis: COAST agar) by means of sterile disposable inoculation loops and then incubated. The D. acnes cultures were incubated at 37°C for 5 days, while the S. epidermidis cultures were incubated at 37°C for 24 hours. The second passage was then generated from this first passage by extracting several colonies with a sterile disposable inoculation loop and spreading them onto new agar plates. The second generation was the...

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Abstract

The present invention relates to cosmetic and dermatological formulations comprising a combination of levulinic acid and anisic acid. The formulations according to the invention are particularly suitable for use on the skin. The preparation shows a selective antibacterial effect on skin by specifically resisting anaerobic bacteria of skin flora, and almost has no or no bactericidal effect on aerobic bacteria. Therefore, the composition according to the invention is suitable for cosmetic skin care, as well as for the dermatological treatment of certain skin diseases such as acne.

Description

technical field [0001] The present invention relates to cosmetic and dermatological preparations comprising a combination of levulinic acid and anisic acid. The formulations according to the invention are particularly suitable for use on the skin. The formulation exhibits selective antibacterial effect on the skin by targeting anaerobic bacteria in the skin flora, while they have little or no bactericidal effect on aerobic bacteria. Therefore, the compositions according to the invention are suitable for cosmetic skin care and also for the dermatological treatment of certain skin diseases such as acne. Background technique [0002] The human skin microbiome is a complex mixture of different microbiota: anaerobic bacteria, such as Cutibacterium acnes (C. acnes), on the skin with aerobic bacteria (such as Staphylococcus epidermidis (S. epidermidis; S. epidermidis) and human Staphylococcus hominis (S. hominis) and fungi colonize very closely. [0003] The interaction between ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/368A61K8/365A61Q19/00A61K31/192A61K31/19A61P17/10
CPCA61K8/368A61K8/365A61Q19/00A61Q17/005A61K31/192A61K31/19A61P17/10A61K2300/00A61P31/04A61K8/0229A61K8/042A61Q19/005
Inventor 贝恩德·特劳佩黑尔加·比耶日吉塞尔安德烈亚斯·菲尔恩多米尼克·格德茨露西亚·赞弗林·特莱德路易斯·阿图罗·卡巴贾尔·阿维拉博而泽·阔尔博尔海克·福尔斯特提那·哈曼佩特拉·肖恩迪恩斯特丹尼尔·里克特
Owner BEIERSDORF AG
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