• Title/Summary/Keyword: B16 cell lines

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Anti-oxidative and Whitening Efects of 4'-O-methylalpinumisoflavone Isolated from Fruit of Maclura Tricuspidata Carrière (꾸지뽕나무 열매에서 추출한 4'-O-methylalpinumisoflavone의 항산화 및 미백 효과)

  • Lyu, Ji Hyo;Noh, Joon Yong;Kim, Sura;Lee, Guem San;Lee, Dongho;Kim, Koanhoi;Kim, Hyungwoo
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.33 no.6
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    • pp.349-355
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    • 2019
  • The anti-inflammatory effects of 4'-O-methylalpinumisoflavone (OMAI) has been reported in recent years. To develop effective and safe skin whitening agents, we investigated the anti-oxidative and melanogenic effects of OMAI isolated from fruit of Maclura tricuspidata Carrière (Cudrania tricuspidata) in macrophage and melanoma cell lines. In our results, OMAI showed effective superoxide scavenging activity and suppressed production of lipopolysaccharide (LPS)-induced intracellular reactive oxygen species (ROS) in RAW264.7 cells. In addition, α-melanocyte stimulation hormone (MSH)-induced production of melanin was also reduced by OMAI in B16F10 cells. Finally, OMAI significantly inhibited tyrosinase activity in B16F10 cells. These results suggest that OMAI suppressed melanin production via scavenging reactive oxygen species and inhibition of tyrosinase activity.

Melanogenesis Inhibition Effects of Nemopilema nomurai Hydrolized Extracts (노무라입깃해파리 가수분해 추출물의 멜라닌합성 저해효과)

  • Lee, Ha Youn;Kim, Young Hoon;Um, Sun Young;Jung, Uk Sun;Chang, Moon Sik;Lee, Nam Ho
    • Journal of the Society of Cosmetic Scientists of Korea
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    • v.40 no.4
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    • pp.341-347
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    • 2014
  • This study was aimed to investigate skin whitening effects of Nomura's jellyfish (Nemopilema nomurai) hydrolyzed extracts (NHE). The extracts were prepared through the hydrolysis of N. nomurai using commercial proteolytic enzymes such as Protamex, Alcalase, Flavourzyme and Neutrase with optimum pHs (pH 5-8) at $55^{\circ}C$. Their whitening activities were examined from the inhibition of melanin synthesis using B16-F1 cell lines. Among the examined samples, Neutrase-treated extract (N-NHE) showed the most significant inhibition effect on melanin synthesis by 89.9% at a concentration of $100{\mu}g/mL$. This sample decreased the expression of tyrosinase and TRP-1 (tyrosinase related protein-1) proteins as well. These results suggested the potential application of NHE as whitening ingredients in cosmetic preparation.

Potential uses of Aristotelia chilensis extracts as novel cosmetic materials (마키베리 추출물의 화장품 신규 원료로서의 가능성)

  • Kim, Mijung;Park, Seyeon
    • Journal of Applied Biological Chemistry
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    • v.62 no.4
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    • pp.339-345
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    • 2019
  • The present study aims to investigate the potential applications of Aristotelia chilensis (A. chilensis) extracts as novel cosmetic materials. The total extracts of A. chilensis were partitioned into chloroform (CHCl3), ethyl acetate (EtOAc), and distilled water (DW) fractions. A. chilensis extracts exhibited no cytotoxicity toward HaCaT human keratinocyte and B16F10 mouse melanoma cell lines. CHCl3, EtOAc, and DW extracts reduced oxidative stress, and EtOAc extract was superior to glutathione, a natural human antioxidant positive control. The extracts of A. chilensis reduced melanin synthesis in cells treated with α-melanocyte-stimulating hormone. The extracts of A. chilensis exhibited antibacterial effects toward Staphylococcus aureus (S. aureus), Staphylococcus epidermidis (S. epidermidis), and Pseudomonas aeruginosa (P. aeruginosa). In particular, the EtOAc extract was effective in terms of antibacterial activity against S. aureus. In the present study, we identified several potential applications of A. chilensis extracts in terms of novel antioxidant and whitening cosmetic materials as well as antibacterial preservatives.

Effect of X-Irradiation on the Levels of some Sulfhydryl Groups, Protein and Cell Volume of Ehrlich Ascites Tumour Cells (X-선(線) 조사(照射)가 Ehrlich 암세포(癌細胞)의 용적(容積), 단백양(蛋白量) 및 수종(數種) Sulfhydryl 기(基)에 미치는 영향(影響)에 관(關)하여)

  • Yu, Choon-Shik;Choo, Young-Eun
    • The Korean Journal of Physiology
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    • v.3 no.2
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    • pp.9-16
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    • 1969
  • It is well known that a number of -SH and -SS containing substances afford a certain measure of protection against radiation effects in many biological systems, and it is conceivable that inherent -SH levels in Ehrlich ascites tumour (ELD)cells may be of decisive improtance with respect to the development of cellular radiation injury. So far, little effort has been directed to elucidate the changes in levels of different -SH and -SS groups in ELD cells when the tumour-bearing whole animal was subjected to the sublethal dose of X-irradiation. The present study was designed to bring some lights in the possible changes of and relationship between various sulfhydryl levels, such as P-SH, NP-SH and NP-SS, as well as the content of protein and cell volume of ELD cells, after subjecting the ELD mice to 1,200 r of X-irradiation. The animals used in this experiment were all mixed bred mice of $20{\sim}25\;gm$ in body weight (approximately 2 months old) irrespective of sex. 12 mice in one experiment were inoculated intraperitoneally with 0.2 ml of ascites tumour cells $(2{\times}10^6\;cells)$, and on the 7th day of the tumour growth, they were X-irradiated with 1,200 r, using the conventional X-ray machine under the following conditions: 200 Kv at 15 mA, 0.5 mm Cu filter, target-skin distance: 50 cm. Radiation dose was measured with the the Philip integrating dosimeter. At 24, 36, 48 and 60 hours after the X-irradiation, the mice were killed by cervical dislocation, and the tumours were taken out. Freshly withdrawn ascites tumours were placed in ice, and immediately the cell concentration was measured with the Coulter Cell Counter (Model B), and the hematocrit of the tumour cells were also determined. Cell volume was thus calculated by the cell concentration and hematocrit value. P-SH content of ELD cells was measured potentiometrically according to the method of Calcutt & Doxey, and NP-SH and NP-SS contents were measured spectrophotometrically by the method described by Ellman. Protein content of ELD cells was determined with the Folin phenol reagent by Lowry et al. Altogether, 48 experimental mice were used, and 12 mice with the only exception of X-irradiation were used as the control. Results obtained indicate that the contents of all the cellular sulfhydryl groups as well as cell volume and protein content of the ELD cells increase significantly as time progresses after the sub-lethal X-ray dose of 1,200 r was given and that all the increase is in a lineal fashion. The regression lines of the relative values, (i. e., taking each control value as 1) of all the values obtained, and the regression lines of cell volume, protein and NP-SH are identical, whereas those of NP-SS and P-SH appear to be widely seperated. However, the difference of those two lines (NP-SS & P-SH) were found to be not significant statistically (p>0.05). Therefore, it can be concluded from the above results that all the values examined increase in a lineal fashion with no statistically significant difference among them. Also, with the radiation dose of 1,200 r, the ELD cell becomes enlarged and swollen progressively up to 60 hours post-irradiation and it becomes more than two times of the original normal size at 60 hours after the irradiation, and up to this stage, it seems apparent that the cell division has been slow due to the X-irradiation applied in this experiment. It is well understandable that the contents of NP-SH, NP-SS, P-SH and protein of the ELD cells increase in parallel with the increase of the cell volume by the X-ray does used, but it also seems interesting to note that all the cellular substances tested show no appreciable difference in the pattern of increase.

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Increased Refolding Yield of Disulfide Bond Bridged Fab-Toxin Homodimers by the Insertion of CH3 Domains

  • Song Jeong-Wha;Won Jae-Seon;Lee Yong-Chan;Choe Mu-Hyeon
    • Journal of Microbiology and Biotechnology
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    • v.16 no.7
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    • pp.1104-1110
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    • 2006
  • Recombinant antibody-toxin is a bifunctional protein that binds and kills a target cell expressing a specific antigen on the surface of the cell, and its structure is chimeric, in which a toxin is fused to an antigen-binding domain such as scFv or Fab. Divalent antibody-toxin molecules showed higher cytotoxicities against cancer cell lines than monovalent molecules. However, the yields of the divalent molecules were very low. In this study, we introduced the CH2, CH3, or CH2-CH3 (=Fc) domain of antibody in the middle of the Fab-toxin between the hinge region of human IgG1 and the toxin domain to increase the yield. The covalently bonded dimer could be formed by three disulfide bridges from cysteine residues in the hinge region. The molecule with the CH3 domain showed about 3-fold higher dimerization yield than previously constructed Fab-toxin molecules, while maintaining the cytotoxic activity comparable to that of scFv-toxin. However, the introduction of CH2 or Fc domain to the same position showed little effect on the dimerization yield. We also observed that the introduction of the CH3 region made it possible to form noncovalently associated dimer molecules.

The Enhanced Effect of Oplopanax elatus Nakai on the Immune System and Antitumor Activity (땃두릅(Oplopanax elatus Nakai) 추출물의 면역자극 활성 및 항암 증진 효과)

  • Hur, Jin Woo;Cho, Eun Hee;Lee, Bo Kyung;Lee, Uiyoung;Yoon, Taek Joon
    • The Korean Journal of Food And Nutrition
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    • v.26 no.3
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    • pp.375-382
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    • 2013
  • The present study is designed to explore an anti-tumor activity on crude extracts of Oplopanax elatus. Water extractions of Oplopanax elatus were performed at $100^{\circ}C$(OeE-100). OeE-100 doses up to $62.5{\mu}g/m{\ell}$ had no cytotoxicity on the tumor cell lines in vitro. In experimental lung metastasis of colon26-M3.1 carcinoma or B16-BL6 melanoma, the prophylactic intravenous ($4{\sim}100{\mu}g/mouse$) or oral (2 mg/mouse) administration of OeE-100 significantly inhibited tumor metastasis as compared with tumor controls. Peritoneal macrophages stimulated with OeE-100 produced various cytokines such as TNF-${\alpha}$, IL-6 and IL-12. In an analysis of NK-cell activities, i.v. administration of OeE-100 ($10{\sim}100{\mu}g/mouse$) significantly augmented the cytotoxicity to YAC-1 tumor cells. Vaccination of mice with boiling-treated tumor cells (BT-vaccine) in combination with OeE-100 ($100{\mu}g/mouse$) showed higher inhibitions in tumor metastasis when compared with the mice of BT-vaccine treatment. In addition, the splenocytes from OeE-100 admixed BT-vaccine immunized mice secreted a higher concentration of Th1 type cytokine such as IFN-${\gamma}$. These results suggested that the OeE-100 stimulated immune system and was a good candidate adjuvant of anti-tumor immune responses.

Cytotoxicity and Antioxidant Activities of the Yeonkyo-san and Its ingredients (연교산과 구성약재에 대한 항암 및 항산화효과)

  • Lee, Jin-Tae;Lee, Chang-Eon;Son, Jun-Ho;Lee, Jin-Young;Park, Tae-Soon;Lee, In-Cheol;Cheon, Soon-Ju;Pyeon, Jeong-Ran;Jee, Seon-Young;Jo, Cheol-Hun;An, Bong-Jeun
    • The Korea Journal of Herbology
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    • v.20 no.3
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    • pp.19-27
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    • 2005
  • Objectives : The antioxidant activities of Yeonkyo-san and its ingredient were investigated for industrial application. Methods : We experimented radical scavenging effect, superoxide dismutase and cytotoxicity effect of various cancer cell. Results : The result were obtained as follows : Primary testing of cytotoxicity of Yeonkyo-san and ingredient was done for G361. B16F10, MDA and A549 cell lines. Yeonkyo-san and ingredient water extract, ethanol extract showed cytotoxicity of over 90% respectively against cell line. The electron donating ability(EDA) of water extract from the Yeonkyo-san was higher than 60%, ethanol extract from the Yeonkyo-san was over 80% at 1000 ppm. The electron donating ability(EDA) of water extract and ethanol extract from the Yeonkyo-san ingredients were increased as well. SOD-like activity was high as 75% in 700 ppm, it was increased. All the other samples showed less than 40% SOD-like activity. Conclusions : The results indicated that water extract and ethanol extract of Yeonkyo-san and ingredient can be used as a natural ingredient with biological functions in cosmetic and food composition.

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Isolation of Melanin Biosynthesis Inhibitory Compounds from the Flowers of Magnolia denudata (신이(辛夷)로부터 멜라닌 생성 억제물질의 분리)

  • Xu, Guang-Hua;Kim, Jeong-Ah;Park, Sung-Hee;Son, Ae-Ryang;Chang, Tae-Soo;Chang, Hyun-Wook;Chung, See-Ryun;Lee, Seung-Ho
    • Korean Journal of Pharmacognosy
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    • v.35 no.2 s.137
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    • pp.152-156
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    • 2004
  • The bioassay-guided fractionation of the MeOH extract of the flowers of Magnolia denudata led us to the isolation of six compounds identified as fargesin(1), kobusin(2), aschantin(3), magnolin(4), rel-[7s,8s,8's]-3,4,3',4'-tetra- methoxy-9,7'- dihydroxy-8,8',7.O.9'-lignan(5) and oplodiol(6), respectively. Among the isolated compounds, fargesin(1) showed most potent inhibitory effect on the melanin polymer biosynthesis in cultured B-16 mouse melanoma cell lines$(IC_{50},\;45.7\;{\mu}M)$.

Isolation of Melanogenesis Inhibitors from Cinnamomi Cortex (계피로부터 멜라닌 생성 억제 성분의 분리)

  • Jung, Hee-Wook;Choi, Ji-Young;Lee, Jong-Gu;Choi, Eun-Hyang;Oh, Joon-Seok;Kim, Dong-Chun;Kim, Jeong-Ah;Park, Seong-Hee;Son, Jong-Keun;Lee, Seung-Ho
    • Korean Journal of Pharmacognosy
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    • v.38 no.4
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    • pp.382-386
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    • 2007
  • Cinnamomi Cortex (Lauraceae), the dried bark of Cinnamomum cassia BLUME, has been used as traditional Chinese medicine for its stomachic, astringent, carminative, antispasmodic, antibacterial, antifungal properties. Four compounds were isolated from the MeOH extract of Cinnamomi Cortex, and their structures were identified as trans-cinnamic acid (1), ${\beta}-sitosterol$ (2), bis(2-methylheptyl)phthalate (3), coumarin (4) by comparison of their physical and spectral data with those reported in the literature. These compounds were tested melanogenesis inhibitory effect on B-16 mouse melanoma cell lines. Among them, trans-cinnamic acid (1) showed the most potent inhibitory effect on melanogenesis with $IC_{50}$ value of $13{\mu}g/ml$. Arbutin, positive control, exhibited an $IC_{50}$ value of $29{\mu}g/ml$.

Immunoaffinity Characteristics of Exosomes from Breast Cancer Cells Using Surface Plasmon Resonance Spectroscopy

  • Sohn, Young-Soo;Na, Wonhwi;Jang, Dae-Ho
    • Journal of Sensor Science and Technology
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    • v.28 no.6
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    • pp.355-359
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    • 2019
  • Exosomes, known as nanoscale extracellular vesicles in the range of 30-150 nm, are known to contain clinically significant information. However, there is still insufficient information on exosomal membrane proteins for cancer diagnosis. In this work, we investigated the characteristics of the membrane proteins of exosomes shed by cultured breast cancer cell lines using a surface plasmon resonance (SPR) spectroscopy and pre-activated alkanethiols modified sensor chips. The antibodies of breast cancer biomarkers such as MCU-16, EpCAM, CD24, ErbB2, and CA19-9 were immobilized on the pre-activated alkanethiols surfaces without any activation steps. The purified exosomes were loaded onto each antibody surface. The affinity rank of the antibody surfaces was decided by the relative capture efficiency factors for the exosomes. In addition, an antibody with a relative capture efficiency close to 100% was tested with exosome concentration levels of 104/µl, 105/µl, and 106/µl for quantitative analysis.