• Journal of Acupuncture Research
• /
• 제23권3호
• /
• pp.91-102
• /
• 2006

목적 : 이 연구에서는 FBS에 의하여 유도되는 혈관 평활근 세포 증식에 대한 봉약침액과 Melittin의 세포 고사효과의 영향 및 작용 기전을 살펴보고자 하였다. 방법 : $I{\kappa}Ba$, p-$I{\kappa}Ba$, p-ERK1/2, p-Akt, p53, Bcl-2, Bax 및 active caspase-3는 Western blotting을, $NF-{\kappa}B$는 EMSA와 immunofluorescence staining을 이용하여 측정하였다. 결과 : 1. Melittin은 $NF-{\kappa}B$ 활성에 대하여 $I{\kappa}Ba$의 인산화를 유의하게 익제하고 $I{\kappa}Ba$를 증가시켰으며, $NF-{\kappa}B$의 DNA 결합과 $NF-{\kappa}B$ p50의 핵 내 유입을 유의하게 감소시켰다. 2. Melittin은 $NF-{\kappa}B$ 활성을 증가시키는 물질인 Akt의 인산화를 유의하게 억제하였고, ERK1/2의 인산화도 억제하였다. 3. Melittin은 세포사멸 전구 단백질인 p53, Bax 및 caspase-3의 발현을 유의하게 증가시켰고, 세포사멸억제 단백질인 Bcl-2의 발현은 감소시켰다. 결론 : 이상의 결과는 $NF-{\kappa}B$ 와 Akt 활성을 억제함으로써 혈관평활근세포 증식을 억제하는 효과가 있음을 입증한 것이며, 향후 안전성 연구를 바탕으로 혈관성형술 후 재발성협착증과 동맥경화증의 치료제로 사용될 수 있을 것으로 기대된다.

• The Korean Journal of Physiology and Pharmacology
• /
• 제3권1호
• /
• pp.11-18
• /
• 1999

Nuclear factor $_{\kappa}B\;(NF-_{\kappa}B)$ activation is modulated by various protein kinases. Activation of $NF-_{\kappa}B$ is known to be important in the regulation of cell viability. The present study investigated the effect of inhibitors of protein tyrosine kinase (PTK), protein kinase C (PKC) and protein kinase A (PKA) on $NF-_{\kappa}B$ activity and the viability of bovine cerebral endothelial cells (BCECs). In serum-deprivation-induced BCEC death, low doses of $TNF{\alpha}$ showed a protective effect. $TNF{\alpha}$ induced $NF-_{\kappa}B$ activation within 4 h in serum-deprivation. PTK inhibitors (herbimycin A and genistein) and PKC inhibitor (calphostin C) prevented $NF-_{\kappa}B$ activation stimulated by $TNF{\alpha}.$ Likewise, these inhibitors prevented the protective effect of $TNF{\alpha}.$ In contrast to $TNF{\alpha}-stimulated\;NF-_{\kappa}B$ activity, basal $NF-_{\kappa}B$ activity of BCECs in media containing serum was suppressed only by calphostin C, but not by herbimycin A. As well BCEC death was also induced only by calphostin C in serum-condition. H 89, a PKA inhibitor, did not affect the basal and $TNF{\alpha}-stimulated\;NF-_{\kappa}B$ activities and the protective effect of $TNF{\alpha}$ on cell death. These data suggest that modulation of $NF-_{\kappa}B$ activation could be a possible mechanism for regulating cell viability by protein kinases in BCECs.

• Journal of Acupuncture Research
• /
• 제36권2호
• /
• pp.80-87
• /
• 2019

Background: This study investigated the anti-inflammatory effects of bee venom (BV) through the inhibition of nuclear factor kappa beta ($NF-{\kappa}B$) expression in macrophages and keratinocytes. Methods: Cell viability assays were performed to investigate the cytotoxicity of BV in activated macrophages [lipopolysaccharide (LPS)] and keratinocytes [interferon-gamma/tumor necrosis factor-alpha ($IFN-{\gamma}/TNF-{\alpha}$)]. A luciferase assay was performed to investigate the cellular expression of $NF-{\kappa}B$ in relation to BV dose. The expression of $NF-{\kappa}B$ inhibitors ($p-I{\kappa}B{\alpha}$, $I{\kappa}B{\alpha}$, and p50 and p65) were determined by Western Blot analysis, and the electromobility shift assay. A nitrite quantification assay was performed to investigate the effect of BV, and $NF-{\kappa}B$ inhibitor on nitric oxide (NO) production in macrophages. In addition, Western Blot analysis was performed to investigate the effect of BV on the expression of mitogen-activated protein kinases (MAPK) in activated macrophages and keratinocytes. Results: BV was not cytotoxic to activated macrophages and keratinocytes. Transcriptional activity of $NF-{\kappa}B$, and p50, p65, and $p-I{\kappa}B{\alpha}$ expression was reduced by treatment with BV in activated macrophages and keratinocytes. Treatment with BV and an $NF-{\kappa}B$ inhibitor, reduced the production of NO by activated macrophages, and also reduced $NF-{\kappa}B$ transcriptional activity in activated keratinocytes (compared with either BV, or $NF-{\kappa}B$ inhibitor treatment). Furthermore, BV decreased p38, p-p38, JNK, and p-JNK expression in LPS-activated macrophages and $IFN-{\gamma}/TNF-{\alpha}$-activated keratinocytes. Conclusion: BV blocked the signaling pathway of $NF-{\kappa}B$, which plays an important role in the inflammatory response in macrophages and keratinocytes. These findings provided the possibility of BV in the treatment of atopic dermatitis.

• 대한약학회:학술대회논문집
• /
• 대한약학회 2001년도 Proceedings of International Convention of the Pharmaceutical Society of Korea
• /
• pp.109-113
• /
• 2001

Oxidized low-density lipoprotein (oxLDL) has been shown to modulate transactivations by the peroxisome proliferator activated receptor (PPAR)$\gamma$ and nuclear factor-kappa B (NF$\kappa$B). In this study, the oxLDL signaling pathways involved with the NF$\kappa$B transactivation were investigated by utilizing a reporter construct driven by three upstream NF$\kappa$B binding sites, and various pharmacological inhibitors. OxLDL and its constituent lysophophatidylcholine (lysoPC) induced a rapid and transient increase of intracellular calcium and stimulated the NF-KB transactivation in resting RAW264.7 macrophage cells in an oxidation-dependent manner. The NF$\kappa$B activation by oxLDL or lysoPC was inhibited by protein kinase C inhibitors or an intracellular calcium chelator. Tyrosine kinase or PI3 kinase inhibitors did not block the NF$\kappa$B transactivation. Furthermore, the oxLDL-induced NF$\kappa$B activity was abolished by the PPAR$\gamma$ ligands. When the endocytosis of oxLDL was blocked by cytochalasin B, the NF$\kappa$B transactivation by oxLDL was synergistically increased, while PPAR transactivation was blocked. These results suggest that oxLDL activates NF-$\kappa$B in resting macrophages via protein kinase C- and/or calcium-dependent pathways, which does not involve the endocytic processing of oxLDL. The endocytosis-dependent PPAR$\gamma$ activation by oxLDL may function as an inactivation route of the oxLDL induced NF$\kappa$B signal. Short heterodimer partner (SHP), specifically expressed in liver and a limited number of other tissues, is an unusual orphan nuclear receptor that lacks the conventional DNA-binding domain. In this work, we found that SHP expression is abundant in murine macrophage cell line RAW 264.7 but suppressed by oxLDL and its constituent I3-HODE, a ligand for peroxisome proliferator-activated receptor y. Furthermore, SHP acted as a transcription coactivator of nuclear factor-$\kappa$B (NF$\kappa$B) and was essential for the previously described NF$\kappa$B transactivation by lysoPC, one of the oxLDL constituents. Accordingly, NF$\kappa$B, transcriptionally active in the beginning, became progressively inert in oxLDL-treated RAW 264.7 cells, as oxLDL decreased the SHP expression. Thus, SHP appears to be an important modulatory component to regulate the transcriptional activities of NF$\kappa$B in oxLDL-treated, resting macrophage cells.

• Archives of Pharmacal Research
• /
• 제24권4호
• /
• pp.307-311
• /
• 2001

The activation of NF-$\kappa$B induced by kojic Acid, an inhibitor of tyrosinase for biosynthesis of melanin in melanocytes, was investigated in human transfectant HaCaT and SCC-13 cells. These two keratinocyte cell lines transfected with pNF-$\kappa$B-SEAP-NPT plasmid were used to determine the activation of NF-$\kappa$B. Transfectant cells release the secretory alkaline phosphatase (SEAP) as a transcription reporter in response to the NF-$\kappa$B activity and contain the neomycin phosphotransferase (NPT) gene for the dominant selective marker of geneticin resistance. NF-$\kappa$B activation was measured in the SEAP reporter gene assay using a fluorescence detection method. Kojic Acid showed the inhibition of cellular NF-$\kappa$B activity in both human keratinocyte transfectants. It could also downregulate the ultraviolet ray (UVR)-induced activation of NF-$\kappa$B expression in transfectant HaCaT cells. Moreover, the inhibitory activity of kojic Acid in transfectant HaCaT cells was found to be more potent than known antioxidants, e.g., vitamin C and N~acetyl-L-cysteine. These results indicate that kojic Acid is a potential inhibitor of NF-$\kappa$B activation in human keratinocytes, and suggest the hypothesis that NF-$\kappa$B activation may be involved in kojic Acid induced anti-melanogenic effect.

• 대한화장품학회지
• /
• 제32권3호
• /
• pp.135-140
• /
• 2006

Nucler factor-kappa B (NF-kappaB) 프로모터는 염증성 질환을 유도하는 호염증성 시토카인의 발현에 중요한 역할을 수행하는 전사인자 중의 하나이다. 본 실험에서는 200 여종의 식물추출물들로부터 항염효능이 있는 추출물을 선발하기 위해 NF-kappaB 리포터 실험을 수행하였다. NF-kappaB 리포터 실험결과, 12종의 식물추출물, 즉 개나리, 고추잎, 박하, 뱀딸기, 뽕나무, 삼백초, 솔잎, 양애줄기, 약쑥, 어성초, 왕벚꽃가지, 조릿대 등이 lipopolysaccharide (LPS)에 의해 유도된 NF-kappaB 프로모터 활성을 농도의존적으로 억제하는 것을 확인하였다. 이들 12종의 식물추출물이 호염증성 시토카인 발현에도 동일한 효과를 나타내는지 알아보기 위해 tumor necrosis factor-alpha (TNF alpha)와 인터루킨-8에 대한 ELISA실험을 실시하였다. ELISA실험 결과, NF-kappaB 리포터 실험결과와 동일하게, TNF-alpha와 인터루킨-8 생산이 12종 식물추출물 모두에서 감소됨을 관찰하였다. 이러한 실험결과는, 12종의 식물 추출물에서 보여지는 호염증성 시토카인 억제효과가 NF-kappaB 프로모터 활성억제를 통해 이루어지고 있음을 시사한다. 또한, 이들 12종 식물은 diphenyl-p-picrylhydrazyl (DPPH) assay를 통해 살펴본 결과 높은 항산화 활성도 있음을 확인하였다. 이상의 결과로부터, 12종의 식물 추출물은 염증성 피부질환 전용 화장품 제형에서 항염 및 자극완화 소재로 응용될 수 있음을 확인하였다.

• Journal of Acupuncture Research
• /
• 제25권2호
• /
• pp.59-74
• /
• 2008

목적 : 이 연구는 봉약침의 봉독과 그 주요성분인 멜리틴이 $NF-{\kappa}B$의 활성억제와 세포자멸사 관련 단백질의 발현 조절을 통하여 세포자멸사를 유도하고 전립선 암세포주인 LNCaP 세포의 성장을 억제하는지를 확인하고 해당 기전을 살펴보고자 하였다. 방법 : 봉독이나 멜리틴을 처리한 후 LNCaP의 성장억제를 관찰하기 위해 WST-1 assay, CCK-8 assay를 시행하였고, 세포자멸사의 관찰에는 DAPI, TUNEL staining assay를 시행하였으며, 세포자멸사 조절단백질의 변동 관찰에는 western blot analysis를 시행하였고, 세포자멸사와 연관된 $NF-{\kappa}B$의 활성 변화를 관찰하기 위해 EMSA를 시행하였으며, LNCaP에서 봉독이나 멜리틴과 $NF-{\kappa}B$의 상호작용을 관찰하기 위해 transient transfection assay를 시행 시 세포생존율과 $NF-{\kappa}B$의 활성 변동을 측정하였다. 결과 : LNCaP 세포에 봉독이나 멜리틴을 처리한 후, 전립선암세포의 성장, 세포자멸사의 유발, 세포자멸사 관련 단백질의 발현, $NF-{\kappa}B$의 활성, $NF-{\kappa}B$의 p50 치환 후 $NF-{\kappa}B$의 활성과 LNCaP 세포 증식에 미치는 영향을 관찰하여 다음과 같은 결과를 얻었다. 1. LNCaP 세포에서 봉독이나 멜리틴을 처리한 후 세포자멸사가 유도되어 세포성장이 억제되었고, 세포자멸사 관련 단백질 중 분리된 PARP, caspase-9, Bax는 유의한 증가를, Bcl-2, p-Akt, MMP 13, XIAP, cXIAP는 유의한 감소를 나타내었다. 2. LNCaP 세포에서 봉독이나 멜리틴을 처리한 후 $NF-{\kappa}B$의 활성의 유의한 감소를 나타내었다. 3. LNCaP 세포에서 $NF-{\kappa}B$ p50를 치환하여 작용기를 없애고 봉독이나 멜리틴을 처리하였을 경우에도 $NF-{\kappa}B$의 활성의 유의한 감소를 나타내었다. 결론 : 이상의 결과는 봉독이나 멜리틴이 $NF-{\kappa}B$의 활성 억제를 통하여 인간 전립선암세포주인 LNCaP의 세포자멸사를 유발함으로써 증식억제 효과가 있음을 입증한 것으로 전립선암의 예방과 치료에 대한 효과적인 치료제 개발에 도움이 될 것으로 기대된다. 다만 그 기전에서 봉독이나 멜리틴은 기존연구와 달리 $NF-{\kappa}B$ p50의 작용기와 직접적으로 상호작용을 하지는 않는 것으로 보이므로 심화 연구를 요한다.

• BMB Reports
• /
• 제44권4호
• /
• pp.267-272
• /
• 2011

ZAS3 is a large zinc finger transcription repressor that binds the ${\kappa}B$-motif via two signature domains of ZASN and ZASC. A loss-of-function study showed that lack of ZAS3 protein induced accelerated cell proliferation and tumorigenesis. Conversely, gain-of-function studies showed that ZAS3 repressed $NF{\kappa}B$-activated transcription by competing with $NF{\kappa}B$ for the ${\kappa}B$-motif. Based on these observations, we hypothesize that ZAS3 promotes apoptosis by interrupting anti-apoptotic activity of $NF{\kappa}B$. Here, we present evidence that upon $TNF{\alpha}$ stimulation, ZAS3 inhibits $NF{\kappa}B$-mediated cell survival and promotes caspase-mediated apoptosis. The inhibitory effect of ZAS3 on $NF{\kappa}B$ activity is mediated by neither direct association with $NF{\kappa}B$ nor disrupting nuclear localization of $NF{\kappa}B$. Instead, ZAS3 repressed the expression of two key anti-apoptotic genes of $NF{\kappa}B$, TRAF1 and TRAF2, thereby sensitizing cells to $TNF{\alpha}$-induced cell death. Taken together, our data suggest that ZAS3 is a tumor suppressor gene and therefore serves as a novel therapeutic target for developing anti-cancer drugs.

• Journal of Acupuncture Research
• /
• 제23권2호
• /
• pp.47-59
• /
• 2006

We previously found that cobrotoxin inhibited $NF-{\kappa}B$ activity by reacting with signal molecules of $NF-{\kappa}B$ which is critical contributor in cancer cell growth by induction of apoptotic cell death. We here investigated whether cobrotoxin inhibits cell growth of human prostate cancer cells through induction of apoptotic cell death, which is related with the suppression of the $NF-{\kappa}B$ activity. Cobrotoxin $(0{\sim}8\;nM)$ inhibited prostate cancer cell growth through increased apoptosis in a dose dependent manner. Cobrotoxin inhibited DNA binding activity of $NF-{\kappa}B$, an anti-apoptotic transcriptional factor. Consistent with the induction of apoptosis and inhibition of $NF-{\kappa}B$, cobrotoxin increased the expression of pro-apoptotic proteins caspase 3. Cobrotoxin, a venom of Vipera lebetina turanica, is a group of basicpeptides composed of 233 amino acids with six disulfide bonds formed by twelve cysteins. NF-kB is activated by subsequent release of inhibitory IkB and translocation of p50. Since sulfhydryl group is present in kinase domain of p50 subunit of NF-kB, cobrotoxin could modify NF-kB activity by protein-protein interaction. And Cobrotoxin down regulated Akt signals. Salicylic acid as a reducing agent of Sulf-hydryl group and LY294002 as a Akt inhibitor abrogated cobrotoxin-induced cell growth and DNA binding activity of $NF-{\kappa}B$. These findings suggest that nano to pico molar range of cobrotoxin could inhibit prostate cancer cell growth, and the effect may be related with the induction of apoptotic cell death through Akt dependent inhibition of $NF-{\kappa}B$ signal.

• 생약학회지
• /
• 제34권2호통권133호
• /
• pp.156-160
• /
• 2003

$NF-{\kappa}B$ (nuclear factor-kappa B) plays a particularly central role in epidermal biology. It has been established that ultraviolet radiation (UVR) is one of the mechanisms to induce the activation of $NF-{\kappa}B$ in human skin. We previously demonstrated that melanogenic inhibitors may act through the inhibition of $NF-{\kappa}B$ activation in keratinocytes. In order to find another type of melanogenic inhibitors of $NF-{\kappa}B$ activation, various kinds of the extracts from crude drugs $(30\;{\mu}g/ml)$ were preincubated with transfectant HaCaT cells for 3 hrs and then UVR $(60\;mj/cm^2)$ was irradiated. UVR-exposed cells were incubated for another 6 hrs to measure the $NF-{\kappa}B$ activity. $NF-{\kappa}B$ activation was measured with the secreatory alkaline phosphates (SEAP) reporter gene assay using a fluorescence detection method. Among natural products, Lycium chinense, Acanthopanax senticosus, Angelica koreana, Kalopanax pictus and Asparagus cochinchinensis were the most potent inhibitors of $NF-{\kappa}B$ activation by UVR. These observations suggest that some crude drugs might act partially through the modulation of the synthesis of melanotrophic factors to decrease melanogenesis in keratinocytes.