• Title/Summary/Keyword: skin barrier function

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Effect of Abelmoschus esculentus extract on anti-melanogenesis and skin barrier function (오크라 추출물의 멜라닌 생성저해 및 피부장벽개선 효과)

  • Kim, Hyun-Soo
    • Korean Journal of Food Science and Technology
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    • v.50 no.3
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    • pp.344-348
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    • 2018
  • We investigated the application of functional materials by examining a variety of physiological activities of Abelmoschus esculentus extract. A. esculentus extract had a low cytotoxicity against murine melanoma B16F10 cells. At concentrations showing little or no cytotoxicity, A. esculentus extract showed high a DPPH radical scavenging activity ($ID_{50}$, $5.24{\mu}g/mL$), inhibited tyrosinase activity ($ID_{50}$, $102.12{\mu}g/mL$), and decreased melanin content ($ID_{50}$, $17.85{\mu}g/mL$). The treatment of B16F10 cells with A. esculentus extract suppressed the protein expression of tyrosinase in a dose-dependent manner. These findings suggest that A. esculentus extract inhibits melanin synthesis in murine melanoma B16F10 cells by suppressing intracellular tyrosinase expression, as well as directly inhibits tyrosinase activity simultaneously. Additionally, A. esculentus extract promotes the expression of involucrin, which is related to skin barrier protection. These results indicate that A. esculentus extract is an appropriate material for improving skin barrier function.

Effect of Seed of Trichosanthes kirilowii on the Skin Barrier of High Dose Corticosteroid Injected hairless Mouse (과루인(瓜蔞仁)이 장기간 고용량 corticosteroid 투여 hairless mouse의 피부장벽에 미치는 영향)

  • Nam, Hae-Jeong;Kim, Kyu-Seok;Kim, Yoon-Bum
    • The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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    • v.21 no.3
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    • pp.1-9
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    • 2008
  • Objective : Prolonged use of systemic corticosteroids negatively impacts skin barrier function. Corticosteroids have a major role in the practical management of many diseases, so it is necessary to find the drug or supplement which could keep the skin healthy during the systemic corticosteroids therapy. Seed of Trichossnthcs kiiilowii was commonly used for pulmonary disease in traditional Chinese medicine. Many studies have investigated and found that seed of Trichosanthes kirilowii has anti-bacterial, anti-HIV, anti-tumor and immunoregulatory functions. This study was performed to investigate the effect of seed of Trichosmthes kirilowii on the Skin Barrier Method : Triamcinolone 0.4mg was injected male hairless mice for 5 weeks ( 2 times a week, totally 10 times), Just before the first injection, hairless mice were divided into 3 groups; Control ( normal saline medicated group ), GroupA( seed of Trichosuuhes kirilowii qd/day medicated group ) and GroupB( seed of Trichosuuhes kiiilowii bid/day medicated group ), Body weight of all the groups were checked during the experiment, After $10^{th}$ injection, TEWL (Transeidermal water loss) of 3 groups were artificially increased by 9 times tape stripping and the changes of TEWL were checked at before stripping, right after, 2h, 4h, 6h, 24h, 48 and 72h later after stripping, AST, ALT and CBC were also checked. Indeed, stratum corneum of 3 groups were also examined and compared with that of normal hairless mouse. Results : 1. GroupB showed significantly lower body weight among three groups 2, There was no statistical difference at AST, ALT and CBC among three groups 3. GroupB was showed significantly lower TEWL than TEWL of Control at 48h later. 4 GroupB recovered it's TEWL of before tape stripping at 24h later, GroupA recovered that at 48h and Control recovered that at 72h later at the same condition 5. Stratum corneum of GroupA and GroupB were looked almost normal and healthy. On the contrary, stratum corneum of Control was looked thin and unhealthy. Conclusions : Seed of Ttichossnthes kirilowii has some effects on skin barrier function, especially TEWL of high dose corticosteroids injected hairless mouse and the efficacy seemed to be related with the dosage.

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Reduction of Skin Irritation by the Control of Skin Permeation of Methyl Paraben

  • Seong-Hoon Jeong;Mun
    • Journal of the Society of Cosmetic Scientists of Korea
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    • v.23 no.3
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    • pp.108-114
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    • 1997
  • The skin permeation study has two meanings in cosmetics. One is how to promote the skin permeation of active meterials for improving their bioavailabilities and the other is how to decrease it of irritants for reducing their skin side effects. In this study, we selected methyl paraben, one of the preservatives, as a model irritant and tried to reduce the skin irritation by the decrease of skin permeation. Furthermore, the relationship between skin permeation and skin primary irritation was discussed. For in vitro skin permeation experiments, Franz type diffusion cells and the excised skin of female hairless mouse from 8 weeks old were used. The donor compartment was charged with oil only or O/W emulsion containing 0.3% MP. We selected 19 oils, including esters, triglycerides, plant oils, hydrocarbons, and alchols, which are broadly used in cosmetics. We evaluated with female guinea pig. The skin permeahility of MP from the oils showed following order: ester oils > triglycerides > plant oils > hydrocarbons > alcohols. We considered that this result was based on the different effect of each oil on the barrier function of stratum corneum. In O/W emulsion containing each oil, the skin permeability of MP decreased as the oil/water partition coefficient of MP increased. The skin primary irritation increased as the skin permeability of MP increased. In conclusion, we suggest that the skin irritation could be reduced by the decrease of skin permeability of MP, which may be obtained by the good selection of oils in cosmetic preparations.

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Effects of Commercial Topical Shampoos on Skin Surface Sebum in Normal Canine Skin (개에서 피부 치료용 샴푸가 표피유분에 미치는 영향)

  • Hwang, Cheol-Yong;Oh, Tne-Ho
    • Journal of Veterinary Clinics
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    • v.19 no.2
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    • pp.225-227
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    • 2002
  • Various commercial shampoos were frequently prescribed for dermatologicstherapy in small animal practice. Skin surface sebum affected by the shampoos, however, was not evaluated routinely. In order to evaluate the skin surface sebum for the exact prescription of shampoos methods to measure skin surface sebum of shampoos are needed. This study was undertaken to evaluate the skin surface sebum effect of shampoo on canine skin using sebometry. Five healthy dogs were applied with 3 commercial shampoos: Sebocalm, Sebolytics, and Benzoyl peroxide. Sebocalm had a great effect on skin surface seoum and normal saline also affected the skin sebum. Sebolytics and benzoyl peroxide had a moderate effect of skin sebum. The lowest effect was shown in detergent. Therefore, Sebumeter was considered a good and convenient apparatus for skin sebum measurement in order to evaluate the effect of shampoos on skin sebum. None of the products tested had any negative effect on the skin barrier function.

Effect of Insamyangyoung-tang on the TEWL of High Dose Steroid Injected Hairless Mice (인참양영탕(人參養榮湯)이 장기간 고용량 스테로이드 투여 hairless mice의 피부장벽에 미치는 영향)

  • Nam, Hae-Jeong;Kim, Yoon-Bum
    • The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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    • v.21 no.2
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    • pp.19-27
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    • 2008
  • Objective : The side effect of prolonged use of topical corticosteroids to skin is well-known. Moreover, resent studies have shown that prolonged use of systemic corticosteroids also negatively impacts skin barrier function. Corticosteroids have a major role in the practical management of many variable conditions. So, it is important to find the drug or the method which could protect the skin from the damage caused by corticosteroids. At former study, we investigated that Insamyangyoung-tang has some effect on skin barrier function of DNCB induced contact dermatitis hairless mice. So, this study was performed to research the effect of Insamyangyoung-tang on the TEWL with high dose steroid injected hairless mice. Method : Hairless mice were divided into 4 groups ; Control group, Group A, Group B and Group C. All groups were injected triamcinolone O.4mg for 10 times. Control group was medicated distilled water during the experimental period. Group A was medicated distilled water for 5 days before the $1^{st}$ injection day, and then medicated Insamyangyoung-tang extract during the experimental period. Group B was medicated Insamyangyoung-tang extract for 5 days before the $1^{st}$ injection day, and then medicated distilled water during the experimental period. Group C was medicated Insamyangyoung-tang extract for 5 days before the $1^{st}$ injection day, and then medicated Insamyangyoung-tang extract during the experimental period. TEWL of each group was measured for 5 times. After the $10^{th}$ injection, the tissue sample was made and the damage of epithelial cell was examined. Statistical significance was set at p<0.05 by using non parametric methods and repeated-anova.. Results : Group C showed significant effect on TEWL change of hairless mice evoked by triamcinolone injection. Group A and Group B also showed some effect, but there was no statistical significance.

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Investigation of the effect of Hibiscus sabdariffa L. extracts on tight-junction related genes in human keratinocyte HaCaT cells (히비스커스 추출물이 인간 각질 형성 세포의 밀착 연접 관련 유전자 발현에 미치는 영향 연구)

  • Jung, Haesoo;Kim, Eunmi;Han, Hyosang;Kim, Keekwang
    • The Korea Journal of Herbology
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    • v.36 no.5
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    • pp.59-67
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    • 2021
  • Objectives : Hibiscus (Hibiscus sabdariffa L.) is rich in antioxidants such as flavonoids and anthocyanins and is known to have anti-inflammatory activity and anti-aging function of the skin, but there is no study on its effect on the skin barrier. This study aim to investigate the positive effect on the skin barrier by confirming the effect of water extracts of Hibiscus sabdariffa L. (WEHS) on the tight junction-related gene expression. Methods : The antioxidant efficacy of WEHS was investigated through ABTS and DPPH assays, and 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium was performed to examine the effect on cell viability. quantitative Reverse transcription polymerase chain reaction and immunoblot analysis were performed to confirm the effect of WEHS on the expression of tight junction-related genes, and immunofluorescence microscopy was used to confirm the movement of Claudin 1 protein into tight junctions. Results : WEHS showed strong antioxidant activity and induced an increase in both mRNA and protein expression levels of Claudin 1 among tight junction-related genes. The strong localization of Claudine 1 protein increased by WEHS to the tight junction was confirmed by immunofluorescence microscopy. Conclusions : Hibiscus was confirmed through this study to show antioxidant activity and the function of promoting the expression of the tight junction Claudin 1 gene, suggesting that Hibiscus can be used as a material for the prevention and treatment of skin moisturizing and atopy, which have an important influence on tight junction.

The Effects of the Fruits of Foeniculum vulgare on Skin Barrier Function and Hyaluronic Acid Production in HaCaT Keratinocytes (HaCaT 세포에서 회향 열매의 피부장벽기능과 hyaluronic acid 생성에 미치는 영향)

  • Yu, Hak Yin;Yang, In Jun;Lincha, V.R;Park, In Sik;Lee, Dong-Ung;Shin, Heung Mook
    • Journal of Life Science
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    • v.25 no.8
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    • pp.880-888
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    • 2015
  • Foeniculum vulgare (FV) has long been used in traditional medicine for the treatment of inflammatory diseases. In addition, it is usually known as an important medicinal and aromatic plant widely used as a carminative, digestive, lactogogue, and diuretic, and for treating respiratory and gastrointestinal disorders. The skin barrier protects against the invasion of pathogens, fends off chemical and physical assaults, and protects against extensive water loss. In this study, the effects of solvent-fractionated FV fruits on strengthening the skin barrier and maintaining moisture, as well as their antifungal activity, were investigated in human keratinocyte (HaCaT) cells. The expression of involucrin, loricrin, filaggrin, hyaluronic acid synthase, human β defensin, and cathelicidin genes and proteins was measured by reverse transcription polymerase chain reaction (RT-PCR) and western blotting. The production of hyaluronic acid was determined by enzyme-linked immunosorbent assay (ELISA). The butanol fraction increased the expression of involucrin and filaggrin. Both the ethyl acetate and the butanol fractions increased hyaluronic acid production by promoting the expression of hyaluronic acid synthase-1. Although the antimicrobial peptides were increased by FV crude extract and its fractions, the samples did not show a significant effect compared to the normal group. These results suggest that the butanol fraction of FV could be very useful in cosmetics for the treatment of dermatological diseases.

Emodin Studies on Anti-inflammatory and Skin Barrier Improvement Activities (Emodin의 항염 및 피부장벽개선 활성 연구)

  • Kim, Se-Gie;Choi, Jae Gurn;Jang, Young-Ah
    • Journal of the Korean Applied Science and Technology
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    • v.38 no.6
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    • pp.1383-1392
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    • 2021
  • It has been reported that emodin, a major pharmacologically active ingredient of herbal medicines such as Polygonum cuspidatum, Polygonum multiflorum, Rheum palmatum, and Aloe vera, is effective in antioxidant, antibacterial, anti-inflammatory, anticancer, and liver protection. In this study, to investigate the potential of emodin to be used as a skin disease and functional material, the activity related to the improvement of inflammation and skin barrier function was confirmed. To observe the anti-inflammatory effect on HaCaT cells, which are human keratinocytes, cytokine inhibition was confirmed by ELISA kit and protein expression by western blot. In HaCaT cells activated with TNF-α (10 ng/mL)/IFN-γ (10 ng/mL), emodin was treated with each concentration (5, 10, 20, 40) µM. As a result, It was confirmed that the production amount of TNF-α, IL-1β and IL-6 decreased as the concentration of emodin increased. In the experimental results on the expression levels of inflammation-related proteins iNOS and COX-2, it was confirmed that 48% of iNOS and 29% of COX-2 were inhibited compared to control at a concentration of 20 µM of emodin. As an indicator of skin barrier function improvement, the mRNA expression level of filaggrin, involucrin, and loricirn and the production amount of filaggrin, involucrin, and loricirn were confirmed. and excellent results were obtained with an emodin concentration-dependent increase. In particular, filaggrin, which was produced twice as much as the control at a concentration of 20 µM, is a protein involved in the formation of NMF, a natural moisturizing factor, and is known to play an important role in moisturizing the stratum corneum. In conclusion, it was confirmed that emodin can be used as a material for improving inflammation and improving skin barrier function, which is part of the potential for use as a skin disease and functional material. It is believed that if additional research is performed in the future, the scope of its application can be further expanded.

Sphingolipids and Antimicrobial Peptides: Function and Roles in Atopic Dermatitis

  • Park, Kyungho;Lee, Sinhee;Lee, Yong-Moon
    • Biomolecules & Therapeutics
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    • v.21 no.4
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    • pp.251-257
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    • 2013
  • Inflammatory skin diseases such as atopic dermatitis (AD) and rosacea were complicated by barrier abrogation and deficiency in innate immunity. The first defender of epidermal innate immune response is the antimicrobial peptides (AMPs) that exhibit a broad-spectrum antimicrobial activity against multiple pathogens, including Gram-positive and Gram-negative bacteria, viruses, and fungi. The deficiency of these AMPs in the skin of AD fails to protect our body against virulent pathogen infections. In contrast to AD where there is a suppression of AMPs, rosacea is characterized by overexpression of cathelicidin antimicrobial peptide (CAMP), the products of which result in chronic epidermal inflammation. In this regard, AMP generation that is controlled by a key ceramide metabolite S1P-dependent mechanism could be considered as alternate therapeutic approaches to treat these skin disorders, i.e., Increased S1P levels strongly stimulated the CAMP expression which elevated the antimicrobial activity against multiple pathogens resulting the improved AD patient skin.