• Journal of the korean academy of Pediatric Dentistry
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• v.44 no.1
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• pp.1-10
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• 2017

The present study aimed to evaluate the validity of resin infiltration in improving color stability after tooth whitening. Enamel samples were extracted from 40 healthy bovine upper incisors, and primary staining and whitening were performed. After that, specimens were randomly divided into 3 groups : resin infiltration group (n = 15, RI group), resin adhesive group (n = 15, RA group), and control group (n = 10). Secondary staining was performed on all samples. Coloration was assessed 5 times as follows: initial color, immediately after staining, after whitening, after resin application, and after secondary staining. Color was measured using a spectrophotometer and recorded by using the CIE $L^*a^*b^*$ color space. The color changes after primary staining for the RI, RA, and control groups were $12.16{\pm}3.50$, $12.16{\pm}3.38$, and $15.81{\pm}6.39$, whereas those after secondary staining were $15.21{\pm}7.19$, $15.93{\pm}4.31$, and $26.62{\pm}17.89$. Color changes after secondary staining showed a significant difference between the RI and control groups. In the within-group comparison between primary and secondary staining, there was no significant difference found in the RI group only (p = 0.26). The results suggest that Color stability after tooth whitening can be improved using resin infiltration.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.31 no.3
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• pp.39-49
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• 2018

Objectives : This study is designed to clarify whitening, anti-inflammatory effect of fractions extracted from the mixture of Phaseolus radiatus L. and ethanol. Methods : In this experiment, we were intended to reveal whitening, anti-inflammatory effect of fractions extracted from the mixture of Phaseolus radiatus L. and ethanol. The whitening activity was confirmed by UV blocking activity, tyrosinase inhibiting activity, and melanin formation inhibiting activity. Anti-inflammatory activity is confirmed by measurement of cytotoxicity level by MTT assay and measurement of Cytokine expression, which is the main mediator of inflammation reaction. Results : As a results, overall activity was high in the ethyl acetate fraction. Tyrosinase inhibitory activity was less than 20% at all concentrations, but the activity to inhibit melanin self-production was higher than that of ethyl acetate fraction at $32.19{\pm}2.79%$ at $100{\mu}g/m{\ell}$. And ethyl acetate fraction had a relatively high UV blocking activity. In the anti-inflammatory test, the concentration-dependent activity was shown, and the chloroform and ethyl acetate fractions showed significant NO production inhibitory activity. Cytokine expression was superior to that of the final stage of B cell differentiation, and cell viability was over 80% except for the chloroform fraction at the concentration of $200{\mu}g/m{\ell}$. Conclusions : The results of this experiment confirmed the whitening effect and anti-inflammatory effect of Phaseolus radiatus L.'s extracts and fractions and report the possibility of application as external medicine.

• Journal of Life Science
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• v.29 no.11
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• pp.1192-1199
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• 2019

The intention of this study was to confirm the possible use of an ethanol extracts of Nelumbinis Rhizomatis Nodus (NRN) as a cosmetic material. To this end, we extracted NRN with 70% ethanol and performed biological activity evaluation of whitening efficacy and wrinkle reduction. We performed cellular tyrosinase inhibition and melanin contents assay to check the whitening activity of NRN and carried out a toxicity evaluation of NRN via an MTT assay and the amounts of associated proteins that affect melanin production in a melanoma cell line (B16F10). And collagenase inhibitory assay was performed for the evaluation of anti-wrinkle of samples. In addition, a toxicity evaluation using an MTT assay and matrix metalloprotease (MMP-1) and procollagen synthesis inhibition by NRN were evaluated in a fibroblast cell line (CCD-986sk). Western blot results for the whitening activity evaluation revealed that the levels of two proteins related to melanin production, tyrosinase-related protein-1 (TRP-1) and tyrosinase-related protein-2 (TRP-2), were decreased in a dose-dependent manner. Moreover, collagenase inhibition activity at a concentration of $500{\mu}g/ml$ NRN by measuring epigallocatechin-3-gallate (EGCG) was increased by more than 80% compared to the control group. Meanwhile, procollagen synthesis was reduced by 68.8% in the UVB-induced CCD- 986sk cells group whereas collagen synthesis recovered by 80.2% with $25{\mu}g/ml$ NRN. The MMP-1 expression rate showed 20.2% reduction at $25{\mu}g/ml$. The results of the experiments verified the whitening and wrinkle suppression effects of NRN and confirmed that it could be used as a safe natural cosmetic material in the future.

• Journal of Life Science
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• v.22 no.7
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• pp.936-942
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• 2012

Prunus mume has been traditionally used as a medicinal food in Korea, Japan, and China. In particular, this fruit has been reported to have beneficial biological effects on gastritis and gastric ulcers. However, its action in relation to skin whitening has remained unclear. Accordingly, the effects of fruit extract of P. mume related to antioxidation and skin whitening were examined in this study. First, using the MTT assay, it was observed that fruit extract of P. mume below 0.1% has no cytotoxicity in B16-F1 cells as a result of cell viability. Second, the direct scavenging effects and the reducing power of the fruit extract of P. mume were evaluated in vitro on DPPH radicals, hydrogen peroxide, and superoxide. It exhibited high reducing power and scavenging activity on the aforementioned reactive oxygen species. Furthermore, we found that its protective effect against genomic DNA damage related to oxidative stress was increased in a dose-dependent manner. In addition, the fruit extract of P. mume had an inhibitory effect on melanin production induced by L-dopa. In addition, it reduced the expression level of NRF-2, SOD-1, and SOD-2 related to antioxidation in western blot analysis. These results suggest that fruit extract of P. mume could exert a whitening effect through inhibition of melanin production by its antioxidant effect.

• Journal of Plant Biotechnology
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• v.43 no.4
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• pp.492-499
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• 2016

This study assessed the whitening and anti-aging effects of the Cistanche deserticola extract, to develop a cosmetic substance. The cell viability of the Cistanche deserticola extract was evaluated in B16F10 melanoma cells by the MTT (3-(4,5-dimethylthaiazol-2-yl)-2,5-diphenyl tetrazolium bromide) assay. The cell viability of the extract was determined to be 90% at 4mg/ml concentration. Furthermore, the tyrosinase, collagenase, and elastase mRNA expression level were measured by RT-PCR, using the Cistanche deserticola extract treated B16F10 melanoma cells. At 4 mg/ml concentration, mRNA expression level of tyrosinase, collagenase, and elastase was dramatically decreased to 80.9%, 37.6%, and 70.9%, respectively. The antioxidant activity of the Cistanche deserticola extract was determined by DPPH free radical scavenging. The DPPH free radical scavenging capacities ranged from 70.6% to 82.6%, when evaluated from 2 mg/ml to 10mg/ml concentrations. The effects of whitening and anti-aging of the Cistanche deserticola extracts were examined at 2, 4, 6, 8, and 10 mg/ml concentration. Tyrosinase activities were inhibited from 66.8% to 78.5%, elastase activities were inhibited from 67.6% to 79.3%, collagenase activities were inhibited from 72.3% to 83.6%, and hyaluronidase activities were inhibited from 65.8% to 69.2%, respectively. These data suggest that the Cistanche deserticola extract is effective in whitening and anti-aging; therefore, it is considered to be a functional cosmetic material in cosmetic products.

• Journal of Life Science
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• v.27 no.5
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• pp.536-544
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• 2017

Abeliophyllum distichum Nakai is deciduous shrubs of flowering plant in Oleaceae. It is important plant resources and consists of one species in the world. Also the endemic plant of A. distichum has been protected and designed endangered plant in Korea. For this reason, study on the immature seeds of A. distichum (ADS) hasn't progressed. In the present study, we evaluated the antioxidant activity and inhibitory effects on proteins and mRNA levels were related in the whitening effect in B16F10 cells. ADS was effective for reaction oxygen species (ROS). ROS causes various diseases such as aging, inflammation, cancer, and etc. Antioxidant properties were evaluated DPPH, ABTS radical scavenging activity and Reducing power. Plants were known that contained phenolic compounds were related in antioxidant activity. Phenolic compounds were phytochemicals commonly named natural polyphenols. These are secondary metabolites of plants involved in the defense against different types of stresses. In results, ADS suppressed the expression and transcription of Tyrosinase, TRP-1, TRP-2, and Microphthalmia-associated transcription factor (MITF). Tyrosinase, tyrosinase-related protein 1 (TRP-1), tyrosinase-related protein 1 (TRP-2) are known to play an important role in melanin biosynthesis. MITF regulated the expression and transcription of Tyrosinase, TRP-1, and TRP-2. In conclusion, ADS was effective in both antioxidant activities and whitening effects. Also, they were associated with the content of phenolic compounds. We suggested that ADS can be use antioxidants and skin-whitening functional cosmetics material derived from natural plant resources.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.44 no.1
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• pp.39-48
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• 2018

The coffee silver skin is a part of coffee beans. We report that the coffee sliver skin extracts exhibited cosmetic properties of antioxidant, anti-winkle and whitening effects. The ethanol extracts of silver skin showed free radical scavenging activity up to 92.26% in $50{\mu}g/mL$, especially against DPPH radical and ABTS radical cation. The silver skin extracts showed inhibitory effects for tyrosinase activity and DOPA oxidation in a dose-dependent manner, suggesting the extracts retain for the whitening property in cosmetics. The coffee silver skin extracts effectively inhibited the elastase and collagenase. Cytotoxicity of the coffee silver skin extracts was measured by the colorimetric MTS assay. The viability of the human keratinocytes (HaCaT) treated with the coffee silver skin extracts was same as that of untreated cells, indicating the extracts are safe to human cells. Here, we suggest that the silver skin extracts of coffee bean could be a potential natural substance for anti-winkle, whitening, antioxidant properties for cosmetics.

• Journal of the Korean Applied Science and Technology
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• v.34 no.4
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• pp.995-1003
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• 2017

Whitening and anti-oxidant effects were observed in order to investigate the biological activations of Salvia plebeia herb ethanol extracts. No toxicity was found in both B16F10 melanoma cells and Raw 264.7 cells exposed to Salvia plebeia herb ethanol extracts for 48 hour. The extracts showed significant antioxidant activity in cell-free and cell-cultured system. In the DPPH radical assay, it removed dose-dependently DPPH radicals and showed 77.6% at $100{\mu}g/mL$. In the cells, it also significantly removed silica-induced ROS generation and LPS-induced NO production in a dose dependent manner. Using L-DOPA and L-tyrosine as a substrate, tyrosinase activity was inhibited using Salvia plebeia herb ethanol extracts in a dose-dependent manner. The supression occurred to be in the B16F10 melanoma cells, where dose-dependently inhibited Salvia plebeia herb ethanol extracts of $1{\mu}g/M$ ${\alpha}$-melanocyte stimulated hormone-induced melanin production and the inhibitory effect was 30.7% at a concentration of $100{\mu}g/mL$. This suggests that the Salvia plebeia herb ethanol extracts are usable for cosmetic product developments for anti-oxidant and whitening effects.

• Molecular & Cellular Toxicology
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• v.4 no.1
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• pp.85-91
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• 2008

These days there is a constant possibility of exposure to UV radiation which can cause abnormal production of melanin and result in skin disease such as hyperpigmentation and melanoma. Many materials were investigated for skin whitening and protection against UV radiation. In this study, we assessed the melanogenesis inhibitory activities of Korean Red Ginseng (KRG, Ginseng Radix Rubra) and Ginkgo (EGb 761 Ginkgo Biloba) in an attempt to develop a new skin whitening agent derived from natural products. B16F10 melanoma cells were treated for 48 hr with KRG and EGb 761. The inhibitory effect on melanogenesis was measured and related cytokines and proteins expression were also investigated by RT-PCR and Western blotting. In addition, we also assessed the effects of these substances on the skin of C57BL/6 mice. Cell growth, melanin content and tyrosinase activity were inhibited effectively in B16F10 melanoma cells treated with KRG and EGb 761. Moreover, tyrosinase mRNA expression was inhibited clearly and melanogenesis related proteins (MRPs) containing tyrosinase, TRP1 and TRP2 were also reduced by KRG and EGb761, while cytokines such as IL-$1{\beta}$ and IL-6 were induced. In the case of UV irradiated mice, we observed induction of cytokine mRNA levels and reduction of MRPs mRNA expression. In addition, a decrease in pigmentation from treatment with KRG and EGb 761 on the skin of mice was observed. These results indicate that KRG and EGb 761 inhibit melanogenesis in B16F10 cells and have display protective activities against UVB. Therefore, we suggest that KRG and EGb 761 are good candidates to be used as whitening agents and UVB protectors for the skin.

• Journal of Korea Technical Association of The Pulp and Paper Industry
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• v.48 no.3
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• pp.5-13
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• 2016

This study investigated the effects of different factors on the migration of a fluorescent whitening agent (FWA) from paper treated with FWAs to non-fluorescent papers. FWA migration experiments were carried out in vertical and friction contacts between the papers dyed with FWAs and non-fluorescent papers. During the experiments, we identified the effects of the addition and types of FWAs, contact time, temperature, and relative humidity (RH) on FWA migration. The fluorescence indices of the non-fluorescent papers were measured before and after the migration experiments, and the Student's t test, a statistical tool, was utilized to compare results from different migration experiments. In vertical contact experiments, FWA migration to non-fluorescent paper was observed at $30^{\circ}C$ and 70% RH; this was attributed to the high moisture content of the paper. FWA migration did not occur significantly at $23^{\circ}C$ and 50% RH. In the friction contact experiments, FWA migrations were identified at both temperature conditions and RH percentages. The addition and types of FWAs did not increase the fluorescence index of non-fluorescent papers. Therefore, it was concluded that the moisture content of paper and the friction contact affected FWA migration from the papers containing internal and surface FWAs.