• 제목/요약/키워드: nuclear factor ${\kappa}B$

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RAW 264.7 대식세포에서 연자육 추출물(Nelumbo nucifera Gaertner Seed Extract, NSE)의 면역 증강 효과 (The immune enhancement effect of Nelumbo nucifera Gaertner Seed Extract (NSE) in murine macrophage RAW 264.7 cells)

  • 김세정;김산;장세현;윤성란;소보람;박정민;류정아;정성근
    • Journal of Applied Biological Chemistry
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    • 제66권
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    • pp.23-28
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    • 2023
  • 코로나바이러스-19로 인한 세계적인 펜데믹 이후 면역력 강화소재에 대한 관심이 급격히 증가하고 있으므로 산업적, 건강적 측면에서 새로운 소재의 개발이 필요하다. 본 연구에서는 연자육 추출물을 소재로 선정하고 RAW 264.7 쥐 대식세포를 이용하여 면역증진 효과를 평가하였다. 연자육 추출물은 RAW 264.7 세포에서 세포 생존력에 독성을 나타내지 않으면서 nitric oxide 및 reactive oxygen species의 생산을 상향 조절하였다. 또한 연자육 추출물은 RAW 264.7 세포에서 inducible nitric oxide synthase 및 cyclooxygenase-2 발현을 크게 증가시켰다. Enzyme-linked immunosorbent assay 결과에서는 연자육 추출물의 처리가 RAW 264.7 세포에서 interleukin 6 및 tumor necrosis factor-α의 생성을 유의미하게 향상시키는 것으로 나타났다. 또한 연자육 추출물이 p65, I kappa B kinase α/β, 및 I kappa B (IκB) α의 인산화를 크게 상향 조절하고, RAW 264.7 세포에서 IκB α의 발현을 하향 조절하였다. 우리의 연구 결과는 연자육 추출물이 Nuclear factor-kappa B 신호전달 경로를 통해 면역력을 향상시킬 수 있는 잠재적인 건강기능식품 소재가 될 수 있음을 나타낸다.

Role of Nuclear Factor-κB in female Breast Cancer: A Study in Indian Patients

  • Jana, Debarshi;Das, Soumen;Sarkar, Diptendra Kumar;Mandal, Syamsundar;Maji, Abhiram;Mukhopadhyay, Madhumita
    • Asian Pacific Journal of Cancer Prevention
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    • 제13권11호
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    • pp.5511-5515
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    • 2012
  • Introduction: The nuclear factor ${\kappa}B$ (NF-${\kappa}B$) is a super family of transcription factors which plays important roles in development and progression of cancer. The present investigation concerns NF-${\kappa}B$ /p65 activity in human breast cancers with overexpression of ER, PR, HER-2/neu, as well as the significance of p65 expression with regard to menopausal status, stage, grade, tumor size, nodal status, and NPI of invasive ductal carcinomas in Eastern India. Materials and Methods: In this hospital based study 57 breast cancer patients attending a Breast Clinic of a reputed institute of Eastern India were assessed for p65 protein expression in breast tumor tissue samples by Western blotting. ER, PR and HER-2/neu expression was determined by immunohistochemistry. Results: NF-${\kappa}B$/p65 was significantly associated with advanced stage, large tumor size (${\geq}5$ cm), high grade, negative ER, negative PR, and positive HER-2/neu. High NF-${\kappa}B$/p65 expression was more frequent in patients with a high NPI ($NPI{\geq}5.4$, 84.6%) compared with low NPI (<5.4, 44.4%) and this association was statistically significant (p = 0.002). Conclusion: NF-${\kappa}B$/p65 overexpression was associated with advanced stage, large tumor size, high grade, and high NPI which are poor prognostic factors linked to enhanced aggressiveness of the disease. NF-${\kappa}B$/p65 expression implies aggressive biological behavior of breast cancer and this study validates significant association of NF-${\kappa}B$ /p65 overexpression with negative estrogen and progesterone receptor status and overexpression of HER-2/neu oncoprotein. In our good clinical practice, patients with NF-${\kappa}B$ positive tumors need to be treated aggressively.

7-아릴옥시-크로만-2-카복사마이드 유도체들의 합성 및 NF-${\kappa}B$ 저해활성 (Synthesis of 7-Aryloxy-chroman-2-carboxamides and their Evaluation of NF-${\kappa}B$ Inhibitory Activities)

  • 최은화;곽재환;김영수;이희순;정재경
    • 약학회지
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    • 제54권3호
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    • pp.200-204
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    • 2010
  • Nuclear factor-${\kappa}B$ (NF-${\kappa}B$) plays critical roles in physiological and pathological processes such as immune function, cellular growth, homeostasis, apoptosis, and inflammation. As part of our ongoing efforts to develop novel NF-${\kappa}B$ inhibitory agents, we reported that KL-1156 (6-hydroxy-7-methoxychroman-2-carboxylic acid phenylamide) exhibited potent inhibitory activity of NF-${\kappa}B$. For further structure-activity relationship, a series of 7-aryloxy-chroman-2-carboxylamide derivatives were synthesized to explore their inhibitory activities of NF-${\kappa}B$.

NF-${\kappa}B$ Activation by Compounds Found in Platycodon grandiflorum Extract

  • Hong, Sung-Won;Yong, Yeon-Joong;Kang, Kyung-Rai;Shin, Soon-Young;Lee, Young-Han;Lim, Yoong-Ho
    • Journal of Microbiology and Biotechnology
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    • 제19권6호
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    • pp.556-559
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    • 2009
  • Compounds extracted from Platycodon grandiflorum were evaluated for an activation effect on nuclear factor-kappa B (NF-${\kappa}B$). In its active state, NF-${\kappa}B$ turns on the expression of genes related to cell proliferation or death. NF-${\kappa}B$ activators promote growth of neuron cells and can be used to control neurodegenerative diseases. The biological activity of P. grandiflorum extracts toward NF-${\kappa}B$ had not yet been studied. Although the biological activity of several compounds extracted from P. grandiflorum was evaluated, only three exhibited any significant activation effect on NF-${\kappa}B$.

Compound K Rich Fractions Regulate NF-κB-dependent Inflammatory Responses and Protect Mice from Endotoxin-induced Lethal Shock

  • Yang, Chul-Su;Yuk, Jae-Min;Ko, Sung-Ryong;Cho, Byung-Goo;Sohn, Hyun-Joo;Kim, Young-Sook;Wee, Jae-Joon;Do, Jae-Ho;Jo, Eun-Kyeong
    • Journal of Ginseng Research
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    • 제32권4호
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    • pp.315-323
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    • 2008
  • In the previous studies, we isolated the compound K rich fractions (CKRF) and showed that CKRF inhibited Toll-like receptor (TLR) 4- or TLR9-induced inflammatory signaling. To extend our previous studies,1) we investigated the molecular mechanisms of CKRF in the TLR4-associated signaling via nuclear factor (NF)-${\kappa}B$, and in vivo role of CKRF for induction of tolerance in lipopolysaccharide (LPS)-induced septic shock. In murine bone marrow-dervied macrophages, CKRF significantly inhibited the induction of mRNA expression of proinflammatory mediators such as tumor necrosis factor-${\alpha}$, interleukin-6, cyclooxygenase-2, and inducible nitric oxide synthase. In addition, CKRF significantly attenuated the transcriptional activities of TLR4/LPS-induced NF-${\kappa}B$. Nuclear translocation of NF-${\kappa}B$ in response to LPS stimulation was significantly abrogated by pre-treatment with CKRF. Furthermore, CKRF inhibited the recruitment of p65 to the interferon-sensitive response element flanking region in response to LPS. Finally, oral administration of CKRF significantly protected mice from Gram-negative bacterial LPS-induced lethal shock and inhibited systemic inflammatory cytokine levels. Together, these results demonstrate that CKRF modulates the TLR4-dependent NF-${\kappa}B$ activation, and suggest a therapeutic role for Gram-negative septic shock.

RAW 264.7 세포에 있어 t10c12-CLA의 ROS를 통한 TNF-${\alpha}$ 생산 및 NF-${\kappa}B$ 활성 조절 (Trans-10, cis-12 Conjugated Linoleic Acid Modulates Tumor Necrosis Factor-${\alpha}$ Production and Nuclear Factor-${\kappa}B$ Activation in RAW 264.7 Macrophages Through Formation of Reactive Oxygen Species)

  • 박소영;강병택;강지훈;양만표
    • 한국임상수의학회지
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    • 제31권6호
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    • pp.469-476
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    • 2014
  • 본 연구는 염증상태에서의 CLA의 효과와 작용기전을 알아보기 위해 LPS-자극 RAW 264.7 macrophages에 있어 ROS 생성과 TNF-${\alpha}$ 생산, NF-${\kappa}B$$PPAR{\gamma}$ 활성을 검토하였다. t10c12-CLA는 LPS로 자극하지 않은 비염증시의 RAW 세포에서는 ROS 생성을 증가시켜 TNF-${\alpha}$ 생산을 유도하였으며, 이 효과는 $PPAR{\gamma}$ 활성화에 의존해서 NF-${\kappa}B$ 활성 증가에 의해 매개되었다. 반면, LPS로 자극한 염증조건의 RAW 세포에서는 t10c12-CLA가 $PPAR{\gamma}$ 활성화에 의존하지 않는 경로로 ROS 생성 및 과도한 TNF-${\alpha}$ 생산을 억제하였다. 본 결과로부터 CLA는 ROS 생성을 통해 TNF-${\alpha}$ 생산 및 NF-${\kappa}B$ 활성을 염증 유무에 따라 조절하는 것으로 사료되었다.

LPS로 유도한 복강대식세포에서 $I{\kappa}B-{\alpha}$ 분해억제에 의한 시경반하탕(柴梗半夏湯)의 항염증효과 (Shigyungbanha-tang Exhibits Anti-inflammatory Effects by Inhibiting $I{\kappa}B-{\alpha}$ Degradation in LPS-stimulated Peritoneal Macrophages)

  • 신조영;이시형;이승언
    • 대한한방내과학회지
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    • 제28권3호
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    • pp.442-452
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    • 2007
  • Objectives : The purpose of this study was to investigate the toll-like receptor (TLR)-4 mediated anti-inflammatory effects of extract from Shigyungbanha-tang (SBT) on the peritoneal macrophage. Methods : To evaluate of TLR-4 mediated inflammatory of SBT. we examined NO and cytokine production in TRL-4 ligand (LPS : lipopolysaccharide) induced macrophages. Furthermore, we examined its molecular mechanism using western blot. Results : Extract from SBT itself does not have any cytotoxic effect in the peritoneal macrophages. Extract from SBT reduced LPS-induced nitric oxide (NO). tumor necrosis factor-alpha ($TNF-{\alpha}$), interleukin (IL)-6 and IL-12 production in peritoneal macrophages. SBT inhibited degradation of inhibitor kappa B-alpha ($I{\kappa}B-{\alpha}$) in the TLR-4 mediated peritoneal macrophages. Conclusions : These results suggest that SBT inhibits NO and cytokines production through inhibiting nuclear factor-kappaB (NF-${\kappa}$B) activation in peritoneal macrophage and that SBT may be beneficial oriental medicine for inflammation.

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인체 폐암세포주에서 NF-$\kappa$B p50/p65 Complex의 활성화 (Activation of the NF-$\kappa$B p50/p65 Complex in Human Lung Cancer Cell Lines)

  • 최형석;유철규;이춘택;김영환;한성구;심영수
    • Tuberculosis and Respiratory Diseases
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    • 제46권2호
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    • pp.185-194
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    • 1999
  • 연구배경: NF-$\kappa$B는 단백질이 생성된 후의 변형(post-translational modification)과 세포내에서의 위치 변화(subcellular localization)에 따라 그 작용이 결정되는 특성을 가진 전사 인자로서 최초에는 면역반응에 있어 중요한 역할을 하는 사실이 알려졌으나 그후 이러한 작용이외에도 급성기 염증 반응, 바이러스의 증식, 세포의 발생과 분화에 있어 중요한 작용을 한다는 사실이 알려지게 되었다. 최근의 연구들에서 NF-$\kappa$B 전사 인자가 정상 세포로부터 암세포로의 형질전환에 있어서도 어떤 기능을 할 것이라는 사실들이 알려지게 되었다. NF-$\kappa$B가 암세포로의 형질 전환, 나아가 암세포의 생성에 어떤 역할을 제공한다면 이러한 사실은 나아가 향후의 암치료에 있어서도 유용한 지식이 될 수 있다. NF-$\kappa$B 전사 인자가 인체 암세포에 있어서 세포의 형질 변환에 연관될 수 있다는 사실은 몇몇 암종에서 알려져 있으나 폐암에서의 NF-$\kappa$B 전사 인자의 종양 생성기능에 있어서는 아직 연구된 바가 없다. 방 법: 본 연구에서는 배양된 인체 폐암세포주에 있어서 NF-$\kappa$B family 전사 인자들의 발현정도를 western blot를 이용하여 관찰하고 과발현된 NF-$\kappa$B 전사 인자의 세포내 위치가 세포핵인지 세포질내에 존재하는 것인지를 각각의 단백질 분획에서 western blot를 시행하여 관찰하였고 또한 immunocy-tochemistry를 시행하여 그 발현 양상을 확인하였다. 존재하는 NF-$\kappa$B 전사 인자가 어떠한 복합체의 형태인지를 알아보기 위하여 세포주의 단백 추출물에서 NF-$\kappa$B family 전사 인자에 대한 항체를 사용하여 immunoprecipitation을 시행하였다. 세포주 단백추출물의 $\kappa$B consensus oligonucleotide에의 결합여부를 보기위하여 electrophoretic mobility shift assay를 시행하였다. 결 과: 배양된 인체 폐암세포주에서는 NF-$\kappa$B family의 p50 subunit, p65 subunit가 발현되어 있었고 p50 subunit의 발현은 세포핵내에 국한하여 위치하고 있음을 western blot와 immunocytochemistry를 통하여 관찰할 수 있었다 immunoprecipitation assay는 세포내에서 p50 subunit가 p65 subunit와 복합체를 이루는 상태로 존재하고 있음을 보여주었다. 폐암세포주의 세포핵 추출물은 NF-$\kappa$B consensus oligonucleotide와 결합할 수 있음을 electrophoretic mobility shift assay를 통하여 확인할 수 있었다. 결 론: 인체 폐암세포주에서 NF-$\kappa$B family 전사 인자의 발현이 활성화되어 있으며 NF-$\kappa$B family 전사 영자가 인체 폐암 형성에 있어 어떤 역할을 할 가능성을 시사한다.

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RAW 264.7 대식세포에서 청국장 열수 추출물(Cheonggukjang Water Extract, CWE)의 면역 증강 효과 (The immune enhancement effect of Cheonggukjang Water Extract (CWE) via activation of NF-κB pathways in murine macrophage RAW 264.7 cells)

  • 장세현;김산;김세정;윤성란;소보람;류정아;박정민;정성근
    • Journal of Applied Biological Chemistry
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    • 제66권
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    • pp.282-288
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    • 2023
  • 코로나19 바이러스의 대유행으로 바이러스와 같은 외부 병원균으로부터 우리의 몸을 보호하는 면역 기능 개선 건강기능식품의 시장은 점차 증가하고 있다. 우리는 본 연구에서 높은 조단백, 조지방, 식이섬유 함량을 나타내는 고영양식품인 청국장이 면역 강화 기능을 나타냄을 밝혀내고자 하였다. 청국장 열수 추출물은 RAW 264.7 세포에서 세포독성을 나타내지 않으며, 대식세포의 nitric oxide, reactive oxygen species 및 interleukin (IL)-6, IL-1β, tumor necrosis factor-α 사이토카인의 생산량을 증가시켰다. 또한, 청국장 열수 추출물은 RAW 264.7 세포에서 inducible nitric oxide synthase 및 cyclooxygenase-2의 발현을 유의적으로 증가시켰다. 청국장 열수 추출물은 RAW 264.7 세포에서 I kappa B kinase α/β와 I kappa B (IκB)α의 인산화 및 IκBα의 degradation을 증가시켰으며, Nuclear factor-kappa B p65의 인산화를 증가시켜 p65의 세포질에서 핵으로의 이동을 촉진하였다. 이러한 연구 결과는 청국장 추출물이 선천성 면역 반응을 강화하는데 유망한 건강기능식품 소재로 활용될 수 있음을 시사한다.

Acrolein with an α,β-unsaturated Carbonyl Group Inhibits LPS-induced Homodimerization of Toll-like Receptor 4

  • Lee, Jeon-Soo;Lee, Joo Young;Lee, Mi Young;Hwang, Daniel H.;Youn, Hyung Sun
    • Molecules and Cells
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    • 제25권2호
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    • pp.253-257
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    • 2008
  • Acrolein is a highly electrophilic ${\alpha},{\beta}$-unsaturated aldehyde present in a number of environmental sources, especially cigarette smoke. It reacts strongly with the thiol groups of cysteine residues by Michael addition and has been reported to inhibit nuclear $factor-{\kappa}B$ ($NF-{\kappa}B$) activation by lipopolysaccharide (LPS). The mechanism by which it inhibits $NF-{\kappa}B$ is not clear. Toll-like receptors (TLRs) play a key role in sensing microbial components and inducing innate immune responses, and LPS-induced dimerization of TLR4 is required for activation of downstream signaling pathways. Thus, dimerization of TLR4 may be one of the first events involved in activating TLR4-mediated signaling pathways. Stimulation of TLR4 by LPS activates both myeloid differential factor 88 (MyD88)- and TIR domain-containing adapter inducing $IFN{\beta}$ (TRIF)-dependent signaling pathways leading to activation of $NF-{\kappa}B$ and IFN-regulatory factor 3 (IRF3). Acrolein inhibited $NF-{\kappa}B$ and IRF3 activation by LPS, but it did not inhibit $NF-{\kappa}B$ or IRF3 activation by MyD88, inhibitor ${\kappa}B$ kinase $(IKK){\beta}$, TRIF, or TNF-receptor-associated factor family member-associated $NF-{\kappa}B$ activator (TANK)-binding kinase 1 (TBK1). Acrolein inhibited LPS-induced dimerization of TLR4, which resulted in the down-regulation of $NF-{\kappa}B$ and IRF3 activation. These results suggest that activation of TLRs and subsequent immune/inflammatory responses induced by endogenous molecules or chronic infection can be modulated by certain chemicals with a structural motif that enables Michael addition.