• 제목/요약/키워드: MG-132

검색결과 418건 처리시간 0.026초

Effects of organic germanium and caffeic acid phenethyl ester on immune system of BALB/c mice following a 14-day oral exposure

  • Park, Jae-Hyun;Lee, Jong-Kwon;Kim, Hyung-Soo;Chung, Seung-Tae;Eom, Jun-H;Kim, Kyung-A;Paik, Soon-Young;Oh, Hye-Young
    • 대한약학회:학술대회논문집
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    • 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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    • pp.173.1-173.1
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    • 2003
  • The present study was conducted to determine the effects of bis-carboxyethyl germanium sesquioxide(Ge-132) and caffeic acid phenethyl ester(CAPE) on immune system in female BALB/c mice. The mice were orally exposed continuously to Ge-132 (0, 50, 100, or 200mg/kg), or CAPE (0, 5. 10, or 20mg/kg) for 14 days. Immunomodulatory activity was evaluated by assessment of body and organ weight, lymphocytes blastogenesis, (omitted)

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루꼴라(Eruca sativa) 추출물의 멜라닌 생성 저해 효과 (Anti-melanogenic effect of Eruca sativa extract)

  • 김현수
    • 한국식품저장유통학회지
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    • 제23권1호
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    • pp.74-79
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    • 2016
  • 본 연구에서 루꼴라(E. sativa)에 대한 다양한 생리활성을 조사하여 기능성소재 응용가능성을 검토하였다. 루꼴라 추출물은 멜라노마 세포에 대하여 낮은 세포독성을 나타냈다. 세포독성이 거의 없는 농도에서 루꼴라 추출물 처리 시 항산화 활성($ID_{50}$, 17.60 mg/L)이 매우 우수하게 나타났으며 루꼴라 추출물 처리시 높은 tyrosinase 활성저해($ID_{50}$, 132.54 mg/L) 및 멜라닌 함량 저하($ID_{50}$, 158.90 mg/L)를 보여주었다. 또한, 루꼴라 추출물 농도 의존적으로 tyrosinase 발현이 억제되었으며, 이는 루꼴라 추출물이 직접적인 tyrosinase 활성저해 및 세포 내 tyrosinase 발현을 억제시킴으로서 멜라닌 합성을 저해하는 것으로 판단된다. 이와 같은 결과로 미루어 볼 때 루꼴라 추출물은 피부미백 소재 등 피부개선 효과를 지닌 기능성 화장품에 활용하기 위한 매우 효과적인 재료가 될 수 있다고 판단되며 향후 주름개선 효과 등 추가적인 실험을 통하여 화장품 소재 개발 응용 가능성을 타진할 것이다.

배지내 게르마늄 처리가 현미 유도 캘러스의 게르마늄 흡수에 미치는 영향 (Effect of Germanium Treatment in Culture Medium on Germanium Absorption by Callus Induced from Brown Rice)

  • 권태오;남궁승박;박병우
    • 한국작물학회지
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    • 제41권6호
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    • pp.729-735
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    • 1996
  • 동진벼의 현미에서 캘러스를 유도하여 증식할 경우 Ge첨가가 캘러스 내의 Ge함량에 미치는 영향을 검토한 결과는 다음과 같다. 배지별 Ge농도에 따른 캘러스 증식율과 캘러스내 Ge 및 무기원소의 함량은 N$_{6}$배지보다는 MS배지에서 캘러스증식이 좋았으며, 캘러스 내 K함량을 제외하고는 Ge 및 기타 무기원소의 함량이 대체로 높았다. N$_{6}$배지와 MS배지 내 Ge농도가 높을수록 캘러스 증식율은 감소되나 캘러스 내 Ge함량은 증가되었고 Ca, Mg, K의 함량은 감소되며 Fe, Mn, Zn, Cu의 함량 등은 Ge농도 100~200 mg/$\ell$까지는 증가되나 그 이상 농도에서는 감소되는 경향이었다. Ge의 종류 및 농도에 따른 캘러스 내 Ge함량은 처리 한 Ge농도가 높을수록 증가되었는데, Ge 시용량이 100 mg/$\ell$ 이하에서는 무기ee(GeOf) 처리가 유기Ge(Ge-132) 처리보다 캘러스 내 Ge함 량이 높았으나, 그 이상의 농도에서는 유기 Ge처리가 무기Ge처리보다 캘러스 내 Ge함량이 높았고 캘러스 활력도 좋았다. 배지의 pH가 낮을수록 캘러스의 활력은 떨어지나 캘러스 내 Ge함량은 높았으며, citric acid 와 myo-inositol의 0.1~l.0 mM을 배지에 처리한 경우 무시용보다 캘러스 생육이나 캘러스 내Ge 및 기타 무기원소의 함량이 증가되었는데, citric acid보다는 myo-inositol의 시용에서 더 증가되었다.

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Neuroprotective Effects of Protein Tyrosine Phosphatase 1B Inhibition against ER Stress-Induced Toxicity

  • Jeon, Yu-Mi;Lee, Shinrye;Kim, Seyeon;Kwon, Younghwi;Kim, Kiyoung;Chung, Chang Geon;Lee, Seongsoo;Lee, Sung Bae;Kim, Hyung-Jun
    • Molecules and Cells
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    • 제40권4호
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    • pp.280-290
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    • 2017
  • Several lines of evidence suggest that endoplasmic reticulum (ER) stress plays a critical role in the pathogenesis of many neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, and amyotrophic lateral sclerosis. Protein tyrosine phosphatase 1B (PTP1B) is known to regulate the ER stress signaling pathway, but its role in neuronal systems in terms of ER stress remains largely unknown. Here, we showed that rotenone-induced toxicity in human neuroblastoma cell lines and mouse primary cortical neurons was ameliorated by PTP1B inhibition. Moreover, the increase in the level of ER stress markers ($eIF2{\alpha}$ phosphorylation and PERK phosphorylation) induced by rotenone treatment was obviously suppressed by concomitant PTP1B inhibition. However, the rotenone-induced production of reactive oxygen species (ROS) was not affected by PTP1B inhibition, suggesting that the neuroprotective effect of the PTP1B inhibitor is not associated with ROS production. Moreover, we found that MG132-induced toxicity involving proteasome inhibition was also ameliorated by PTP1B inhibition in a human neuroblastoma cell line and mouse primary cortical neurons. Consistently, downregulation of the PTP1B homologue gene in Drosophila mitigated rotenone- and MG132-induced toxicity. Taken together, these findings indicate that PTP1B inhibition may represent a novel therapeutic approach for ER stress-mediated neurodegenerative diseases.

SIRT1 Suppresses Activating Transcription Factor 4 (ATF4) Expression in Response to Proteasome Inhibition

  • Woo, Seon Rang;Park, Jeong-Eun;Kim, Yang Hyun;Ju, Yeun-Jin;Shin, Hyun-Jin;Joo, Hyun-Yoo;Park, Eun-Ran;Hong, Sung Hee;Park, Gil Hong;Lee, Kee-Ho
    • Journal of Microbiology and Biotechnology
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    • 제23권12호
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    • pp.1785-1790
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    • 2013
  • The synthetic machinery of ATF4 (activating transcription factor 4) is activated in response to various stress conditions involved in nutrient restriction, endoplasmic reticulum homeostasis, and oxidation. Stress-induced inhibition of proteasome activity triggers the unfolded protein response and endoplasmic reticulum stress, where ATF4 is crucial for consequent biological events. In the current study, we showed that the $NAD^+$-dependent deacetylase, SIRT1, suppresses ATF4 synthesis during proteasome inhibition. SIRT1 depletion via transfection of specific siRNA into HeLa cells resulted in a significant increase in ATF4 protein, which was observed specifically in the presence of the proteasome inhibitor MG132. Consistent with SIRT1 depletion data, transient transfection of cells with SIRT1-overexpressing plasmid induced a decrease in the ATF4 protein level in the presence of MG132. Interestingly, however, ATF4 mRNA was not affected by SIRT1, even in the presence of MG132, indicating that SIRT1-induced suppression of ATF4 synthesis occurs under post-transcriptional control. Accordingly, we propose that SIRT1 serves as a negative regulator of ATF4 protein synthesis at the post-transcriptional level, which is observed during stress conditions, such as proteasome inhibition.

청송약수의 탄산과 유해 가능성 물질 존재에 관한 연구 (A Study of the Presence of Carbonic Acid and Other Potentially Hazardous Substances in Cheongsong Mineral Water)

  • 이성호
    • 한국식품영양학회지
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    • 제34권1호
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    • pp.132-136
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    • 2021
  • The purpose of this study is to measure the levels of eluted and dissolved CO2, and CO, volatile organic substances and radiation composition of Cheongsong mineral water which were collected from November 2019 to July 2020 during the autumn, spring, and summer seasons at collection points located in the upper, middle and lower spring waters. Data of the upper, middle and lower spring waters include the following: the amount of eluted water (average value±standard deviation, mL/min) was 30.07±0.52, 15.03±0.16, 23.73±0.42, and the amount of CO2 gas was 1,000 ppm or more. In addition, there was no detection of CO or total volatile organic substances (TVOC) and the radiation dose was 0.08 to 0.13. μSv/h. A blank test value of 0.08 to 0.10 μSv/h, when compared with the median value, showed a high value of 0.02 μSv/h, and the uranium test results provided by the Cheongsong-gun Office were 0.0118 mg/L (date 2019.06.18) and 0.0091 mg/L (date 2020.06.04.) respectively, which was less than the permission limit of 0.03 mg/L. However, it is believed that further research using more precise devices is needed in order to guarantee the safety and health of the water.

Enhanced photocatalytic performance of magnesium-lithium co-doped BiVO4 and its degradation of methylene blue

  • Nayoung Kim;Hyeonjin Kim;Jiyu Lee ;Seog-Young Yoon
    • 한국결정성장학회지
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    • 제33권4호
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    • pp.132-138
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    • 2023
  • Doped and undoped-BiVO4 samples with different elements (Li, Mg) and amounts were synthesized with a hydrothermal method. The synthesized samples were characterized using various techniques including X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-Vis diffusion reflectance spectroscopy (UV-Vis DRS), and photoluminescence (PL) spectroscopy. Photocatalytic activity of the samples was evaluated by measuring the degradation of methyl blue (MB) under visible light irradiation. The results indicated that the incorporation of Mg and Li into BiVO4 caused lattice distortion, the presence of surface hydroxyl groups, a narrower band gap, and a reduced recombination ratio of photo-induced electron-hole pairs. Notably, the photocatalytic activity of Mg5%-Li5% co-doped BiVO4 sample exhibited a significant improvement compared to that of undoped BiVO4 sample.

폐암 세포에서 Proteasome Inhibitor에 의한 Apoptosis의 기전 (The Mechanism of Proteasome Inhibitor-Induced Apoptosis in Lung Cancer Cells)

  • 김철현;이경희;이춘택;김영환;한성구;심영수;유철규
    • Tuberculosis and Respiratory Diseases
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    • 제54권4호
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    • pp.403-414
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    • 2003
  • 연구배경 : Proteasome 억제가 세포의 apoptosis에 미치는 영향은 세포 종류에 따라 차이를 보이고 있다. 그러나 아직까지 폐암 세포에서 proteasome 억제가 미치는 효과 및 그 기전에 관해서는 확실하게 규명되어 있지 못한 상태이다. 본 연구에서는 폐암 세포주에서 proteasome 억제에 의한 apoptosis의 유도 유무를 관찰하고, 그 기전을 규명하고자 하였다. 방 법 : 폐암 세포주인 A549와 NCI-H157 세포에 proteasome 억제제인 MG132와 PS-341을 투여하고 세포의 생존율을 MTT 분석으로 평가하였고, apoptosis 유무를 PARP 단백에 대한 Western 분석으로 확인하였다. Proteasome 억제가 caspase 3와 JNK의 활성화에 미치는 효과를 각각 Western 분석과 immunocomplex kinase 분석으로 평가하였다. Proteasome 억제제를 투여하고 항 apoptosis 경로인 ERK와 cIAP1에 미치는 효과를 Western 분석으로 평가하였다. 결 과 : A549와 NCI-H157 세포에 MG132를 투여하였을 때, 세포생존율의 감소가 관찰되었고, 이는 apoptosis의 유도에 의한 것으로 확인되었다. MG132와 PS-341 처치로 caspase 3와 JNK가 활성화되었다. 반면에 활성화된 ERK의 발현과 cIAP1의 발현은 감소하였다. 결 론 : 폐암 세포에서 proteasome 억제에 의한 apoptosis에는 caspase 3, JNK와 같은 apoptosis 유도 경로의 활성화와 함께 항 apoptosis 경로의 억제가 관여할 것으로 생각된다.

메주 유래의 Syncephalastrum racemosum PDA 132-2가 생산하는 Protease의 정제 및 특성 (Purification and Characteristics of Protease Produced by Syncephalastrum racemosum PDA 132-2 from Korean Traditional Meju)

  • 유진영;임성일
    • 한국식품영양과학회지
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    • 제28권5호
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    • pp.1010-1016
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    • 1999
  • Protease related mold was isolated and selected as a starter culture for commercial production of meju. Isolated microorganism was identified as Syncephalastrum racemosum PDA 132 2. To obtain basic data about protease for production of soybean peptides and application of the strain in meju fermentation, we extrated and purified protease and charateristics of the enzyme were investigated. The optimum condition for the production of enzyme was pH 4.0, 30oC, 5 days. The protease was purified 19.7 folds by gel filtration and ion exchange chromatography and specific activity was 12.4unit/mg. The purified enzyme was 34kDa in size, thiol protease(100% inhibited by PCMB), and was acidic protease(stable between pH 2.0~5.0). Vmax of the enzyme was 2.14 g/min which was lower(1/50) than that of by Asp. wentti and B. subtilis.

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멕시코산 황소눈복어 (Sphoeroides annulatus)의 독성 및 정미성분 (Toxicity and Taste Components of the Pufferfish, Sphoeroides annulayus (bull's eye puffer), from Mexico)

  • 김경삼;김동수
    • 한국수산과학회지
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    • 제33권1호
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    • pp.75-78
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    • 2000
  • 수산물 수입이 전면 개방됨에 따라 앞으로 외국으로부터의 수산물 수입이 급증할 것으로 여겨지는 시기에 외국산 복어 가운데 멕시코산 황소눈복어에 대한 독성 및 정미성분에 관한 자료를 얻기 위하여 mouse assay법에 의하여 독성을 조사하였고, 아울러 정미성분인 ATP관련물질과 유리아미노산도 분석하였다. 생식선은 약한 독성 (무독 내지 $25{\mu}/g$)을 나타내었으나, 그 이외의 부위 및 가식부인 근육 및 껍질의 독성검사 결과는 모두 $10{\mu}/g$이하로서 무독한 것으로 나타났다. 핵산관련물질 가운데 IMP 및 ADP가 $5.61{\mu}mol/g$$2.7{\mu}mol/g$으로 많았고, 전체 ATP 관련물질의 $41.4{\%}$를 차지하였다. 유리아미노산은 모두 19종이 검출되었으며, 총량은 1,648.2mg/100g이었다. 유리아미노산 중 함량이 많은 아미노산은 L-glycine, L-alanine, L-anserine, L-threonine 및 L-valine으로 각각 233.5 mg/100 g, 169.0 mg/100 g, 149.1 mg/100 g, 135.7mg/100 g 및 132.3 mg/100g이었고, 또한 이들 아미노산의 전체 유리아미노산에 대한 중량 비율은 각각 $14.28{\%},\;10.33{\%],\;9.12{\%},\;8.30{\%}$$8.09{\%}$로서 이들 5종류의 아미노산이 전체 유리아미노산의 $50.12{\%}$를 차지하였다. 또한 taurine의 경우는 119.3mg/100 g, L-histidine의 경우는 14,7mg/100 g이었다.

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