• 대한임상검사과학회지
• /
• 제53권4호
• /
• pp.363-370
• /
• 2021

본 연구는 중금속화합물인 초산납(LA)의 피부독성을 B16/F10 멜라닌세포를 배양하여 조사하였으며, LA의 독성에 대한 싸리나무(Lespedeza bicolor, LB) 추출물의 보호효과를 조사하였다. 본 연구를 위하여 세포생존율을 비롯하여 항산화능 분석인 전자공여능(EDA)활성 억제능과 총 멜라닌량 저해능을 조사하였다. 그 결과 LA는 배양 세포에 처리한 농도 의존적으로 세포생존율을 유의하게 감소시킴으로써 독성을 나타냈다. 이 때 XTT₅₀값은 52.7 µM로서 고독성(highly-toxic)인 것으로 나타났다. 한편, 항산화제인 kaempferol (KAE)은 LA의 독성에 손상된 세포생존율을 유의하게 증가시켰다. 또한, LA의 독성에 대한 LB 추출물의 보호효과에 있어서, LB 추출물은 LA만의 처리에 비하여 세포생존율을 유의하게 증가시켰으며, 이와 동시에 전자공여능(EDA) 활성 억제능과 멜라닌 저해능과 같은 항산화 효과 및 멜라닌화의 억제를 나타냈다. 이상의 결과로부터 LA의 독성에 산화적 손상이 관여하고 있으며, LB 추출물은 항산화와 멜라닌화의 저해 효과에 의하여 LA의 독성을 효과적으로 방어하였다. 따라서, LB 추출물과 같은 천연물질은 LA와 같이 산화적 손상과 관련이 있는 중금속화합물의 독성방어나 또는 멜라닌화로 인한 질환을 위한 치료 및 간호중재 보완물질로 개발할 가치가 있다고 생각된다. 본 연구결과를 기반으로 산화적 손상이 원인인 질환에 LB 추출물을 적용가능한 형태 및 방법에 대해 추가 연구가 필요함을 제언한다.

• Journal of Microbiology and Biotechnology
• /
• 제30권8호
• /
• pp.1184-1194
• /
• 2020

Melanin is a major factor that darkens skin color as one of the defense systems to prevent the harmful effects of UV light. However, darkened skin from the localized or systemic accumulation of melanin is viewed in many cultures as an esthetic problem. Consequentially, searching for anti-melanogenic agents from natural sources is very popular worldwide. Previous screening of fermented rice products, obtained from various rice cultivars fermented with different sources of loog-pang (Thai traditional fermentation starter), revealed that the highest ability to reduce the melanin content in B16F10 melanoma cells was from unpolished black rice fermented with a defined starter mixture of microbes isolated from loog-pang E11. The aim of this study was to investigate the mechanism of the fermented unpolished black rice (FUBR) on the inhibition of melanogenesis in B16F10 melanoma cells. The strongest reduction of cellular melanin content was found in the FUBR sap (FUBRS). The melanin reduction activity was consistent with the significant decrease in the intracellular tyrosinase activity. The FUBRS showed no cytotoxic effect to B16F10 melanoma or Hs68 human fibroblast cell lines. It also significantly reduced the transcript and protein expression levels of tyrosinase, tyrosinase-related protein 1 (TYRP-1), TYRP-2, and microphthalmia-associated transcription factor. Furthermore, it induced a significantly increased level of phosphorylated ERK, p38 and Akt signaling pathways, which likely contributed to the negative regulation of melanogenesis. From these results, a model for the mechanism of FUBRS on melanogenesis inhibition was proposed. Moreover, these results strongly suggested that FUBRS possesses anti-melanogenesis activity with high potential for cosmeceutical application as a skin depigmenting agent.

• 생명과학회지
• /
• 제20권7호
• /
• pp.1034-1040
• /
• 2010

천연의 식물과 추출물은 비용의 효율성과 풍부한 자원을 이점으로 식품, 약, 의약 분야와 마찬가지로 화장품 분야에서도 이용될 수 있다. 현재까지 섬쑥부쟁이는 항산화 활성을 제외하고는 그 효능에 대해 알려진 바가 없다. 따라서 본 연구에서는 울릉도의 대표적인 특산 식물인 섬쑥부쟁이 추출물을 이용하여 화장품 분야에서의 활용방안에 대한 연구를 조사한바, 효소적 in vitro 검색법을 측정하여 이들 중 가장 우수한 EtOAc 추출물을 대상으로 이러한 저해능이 멜라닌 생성에 관련된 단백질 발현과도 연관성이 있는지를 확인하기 위해 B16F10 melanoma cell line 내 단백질 수준을 확인하였다. Tyrosinase, TRP-1의 항체를 이용한 western blot으로 관련 단백질의 발현량을 조사한 결과 섬쑥부쟁이 에틸아세테이트 분획물 100 ug/ml을 처리한 군에서는 tyrosinase protein을 30.5%를 억제하였고, TRP-1은 41.5% 억제하였다. 한편, 섬쑥부쟁이 분획물의 생육 저해환 측정에서는 Staphylococcus epidermidis, Propionibacterium acnes, Escherichia coli에 대하여 헥산 분획물 2 mg/disc에서 각각 21.0 mm, 12.0 mm, 14.0 mm의 저해환을 나타내어 섬쑥부쟁이 헥산 분획물만이 유일하게 높은 항균활성을 나타났다. 이들 실험 결과를 미루어보아, 섬쑥부쟁이의 화장품 분야에서의 활용적 가치가 충분하다고 사료되나, 그 활성 성분에 대한 명확한 규명을 위한 추가적인 연구를 제시하는 바이다.

• Asian Pacific Journal of Cancer Prevention
• /
• 제15권8호
• /
• pp.3659-3665
• /
• 2014

To assess inhibition mechanisms of a Phellinus igniarius (PI) extract on cancer, C57BL/6 mice were orally treated with PI extractive after or before implanting H22 (hepatocellular carcinoma ) or B16 (melanoma) cells. Mice were orally gavaged with different doses of PI for 36 days 24h after introduction of H22 or B16 cells. Mice in another group were orally treated as above daily for 42 days and implanted with H22 cells on day 7. Then the T lymphocyte, antibody, cytokine, LAK, NK cell activity in spleen, tumor cell apoptosis status and tumor inhibition in related organs, as well as the expression of iNOS and PCNA in tumor tissue were examined. The PI extract could improve animal immunity as well as inhibit cancer cell growth and metastasis with a dose-response relationship. Notably, PI's regulation with the two kinds of tumor appeared to occur in different ways, since the antibody profile and tumor metastasis demonstrated variation between animals implanted with hepatocellular carcinoma and melanoma cells.

• Natural Product Sciences
• /
• 제28권1호
• /
• pp.6-12
• /
• 2022

Five sesquiterpenoids, 7-epi-eudesm-4(15)-ene,1β,6α-diol (1), 7-epi-eudesm-4(15)-ene,1β,6α-diol (2), saniculamoid D (3), aphanamol I (4), and 4β,10α-dihydroxyaromadendrane (5), were isolated from the stem bark of Aglaia grandis. The compounds' (1-5) chemical structures were identified by spectroscopic data including, IR, NMR (¹H, ¹³C, DEPT 135°, HMQC, HMBC, ¹H-¹H COSY), and HRTOFMS, as well as by comparing with the previously reported spectral data. Therefore, this study described the structural elucidation of compounds 1-5 and evaluated their cytotoxic effects against Hela cervical and B16F10 melanoma cells for the first time, but no significant result was discovered.

• Journal of Nutrition and Health
• /
• 제40권2호
• /
• pp.147-153
• /
• 2007

In this study, we investigated the anticancer activity of the fin of Thunnus Thynnus (TT). TT was extracted with methanol (TTM), and then further fractionated into four subfractions by using solvent partition method, affording hexane (TTMH), methanol (TTMM), butanol (TTMB) and aquous (TTMA) soluble fractions. We determined the cytotoxicity of these four fractions in four kind of cancer cell lines, such as HepG2, MCF-7, B16-F10 and HT29 by MTT assay. The TTMM showed the strongest cytotoxic effect at the concentration of 150 ${\mu}g/mL$, displaying 95% on the HepG2 cell lines and 82% on MCF-7 cell line. The morphological changes such as membrane shirinking and blebbing of cells were also observed by TTMM treatment in HT29 cell. In addition, we observed that quinone reductase (QR) activity was elevated by only TTMM and TTMH treatments in HepG2 cell. QR activity was increased to around 2.0 and 1.8 times in TTMM and TTMH treated HepG2 cell at 100 ${\mu}g/mL$, respectively, compared to that in control. Although further studies are needed, the present work could suggest that the fin of TT has a potential to be usable as a chemopreventive agent against cancer.

• Archives of Pharmacal Research
• /
• 제24권6호
• /
• pp.524-526
• /
• 2001

Four prostate-type triterpenes were isolated from a methanol extract of Alismatis Rhizoma by bioassay-guided isolation using in vitro cytotoxic assay. The compounds were identified as alisol B 23-acetate (1), alisol C 23-acetate (2), alisol B (3), alisol A 24-acetate (4) by spectroscopic methods. Amongst the compounds, alisol B (3) showed significant cytotoxicity against SK-OV3, B16-F10, and HT1080 cancer cell lines with $ED_50$ values of 7.5, 7.5, $4.9\mu\textrm{g}/ml$, respectively.

• Archives of Pharmacal Research
• /
• 제25권5호
• /
• pp.600-607
• /
• 2002

Two series of 2,3-diarylcyclopent-2-ene-1-ones including 2-aryl-3-(2,5-dihydroxyphenyl)cyclopent-2-ene-1-ones (2a∼2f) and 3-aryl-2-(3',4',5'-trimethoxyphenyl)cyclopent-2-ene-1-one (3a∼3j) were synthesized and evaluated for the cytotoxicity against three tumor cell lines; B16F10, HCT116 and A431. It was found that the 3,4,5-trimethoxy substituent was optimal for the bioactivity of compounds in series 2. Meanwhile, compounds in series 3 exhibited the most potent cytotoxicity with 3-aryl ring being 4-methoxyphenyl (compound 3f), (3-hydroxy-4-methoxy)phenyl (compound 3e), or (3-amino-4-methoxy)phenyl (compound 3j).

• Archives of Pharmacal Research
• /
• 제25권5호
• /
• pp.608-612
• /
• 2002

The twelve-protostane analogues were synthesized from alisol B 23-acetate and assessed for their in vitro antitumor activity against six different human and murine tumor cell lines. Of the compounds synthesized, 23S-acetoxy-24R(25)-epoxy-11$\beta$,23S-dihydroxyprotost-13(17)-en-3-hy-droxyimine (12) exhibited significant cytotoxic activities against A549, SK-OV3, B16-F10, and HT1080 tumor cells with $ED_{50}/$ values of 10.0, 8.7 ,5.2, and 3.1 ${\mu}g$/ml, respectively. Furthermore, 23S-acetoxy-13(17),24R(25)-diepoxy-11$\beta$-hydroxyprotost-3-one (5), 13(17),24R(25)-diepoxy-11$\beta$, 23S-dihydroxyprotostan-3-one (6), 24R,25-epoxy-11$\beta$,23S-dihydroxyprotost-13(17)-en-3-one (7), and 11$\beta$,23S,24R,25-tetrahydroxyprotost-13(17)-en-3-one (9) showed moderate cytotoxic activities against 816-F10 and HT1080 tumor cells. These results mean that a hydroxyimino group at C-3 position in the protostane-type terpene enhances cytotoxic activity.

• 동의생리병리학회지
• /
• 제17권3호
• /
• pp.765-770
• /
• 2003

To explore the possible cancer agent from oriental prescriptions, we have examined its antitumor and anti metastatic activities of Kamibojungikgi-tang(KBIT). KBIT extracts exhibited cytotoxicity against P388, A549 and B16-F10 cell lines in a dose-dependent manner and showed antiadhesive effect of A549 cell to complex extracellular matrix at 1 ㎎/㎖ in vitro. In DNA topoisomerase I assay, KBIT extracts showed strong inhibitoty effect in a dose-dependent manner. In pulmonary colonization assay with B16BL6, a number of colonies in the lungs were decreased effectively in KBIT treated group as compared with control group. Moreover, in CAM assay, KBIT extracts significantly inhibited angiogenesis at 15㎍/egg as compared with control. The T/C% was 141% in KBIT treated group in S-180 bearing ICR mice. From the above results it was concluded that KBIT had antitumor and anti metastatic activities. So it is expected to be clinically helpful on the prevention and treatment of cancer, although it is still necessary to study its mechanism on molecular biology and immunology.