• Journal of Microbiology and Biotechnology
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• 제18권4호
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• pp.686-694
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• 2008

The inhibitory effects of 5,6,3',5'-tetramethoxy 7,4'-hydroxyflavone (labeled as p7F) were elucidated on the productions of proinflammatory cytokines as well as inflammatory mediators in human synovial fibroblasts and macrophage cells. p7F inhibited IL-1${\beta}$ or TNF-${\alpha}$ induced expressions of inflammatory mediators (ICAM-1, COX-2, and iNOS). p7F also inhibited LPS-induced productions of nitric oxide and prostaglandin $E_2$ in RAW 264.7 cells. In order to investigate whether p7F would inhibit IL-1 signaling, p7F was added to the D10S Th2 cell line (which is responsive to only IL-1${\beta}$ and thus proliferates), revealing that p7F inhibited IL-1${\beta}$-induced proliferation of D10S Th2 cells in a dose-response manner. A flow cytometric analysis revealed that p7F reduced the intracellular level of free radical oxygen species in RAW 264.7 cells treated with hydrogen peroxide. p7F inhibited IkB degradation and NF-${\kappa}$B activation in macrophage cells treated with LPS, supporting that p7F could inhibit signaling mediated via toll-like receptor. Taken together, p7F has inhibitory effects on LPS-induced productions of inflammatory mediators on human synovial fibroblasts and macrophage cells and thus has the potential to be an anti-inflammatory agent for inhibiting inflammatory responses.

• 대한한방내과학회지
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• 제21권2호
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• pp.259-266
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• 2000

Objectives : The effects of aqueous extracts of Cortex ulmi pumilae (a traditional medicine for cancer treatment in oriental medicine) on the induction of apoptotic cell death were investigated in human liver origm hepatoma cell lines, HepG2. Methods : The death of HepG2 cells was markedly induced by the addition of extracts of Cortex ulmi pumilae in a dose-dependent manner. The apoptotic characteristic ladder pattern of DNA strand break was not observed in cell death of HepG2. In addition, it was not shown nucleus chromatin condensation and fragmentation under hoechst staining. However, by the using annexin V staining assay, externalizations of phosphatidylserine in HepG2 cell which were treated with Cortex ulmi pumilae extracts were detected in the early time (at 9 hr after extract treatment). Furthermore, LDH release was not detected in this early stage. Therefore, Cortex ulmi pumilae extracts-induced cell death of HepG2 cells is mediated by apoptotic death signal processes. Result : The activity of caspase 3-like proteases remained in a basal level in HepG2 cells which treated with the extract of Cordyceps sinensis. However, it was markedly increased in HepG2 cells which treated with two extracts of Cortex ulmi pumilae (C.U.P.-C, C.U.P.-K) which were differently extracted (respectively, 2.3 and 3.3 fold). On a while, the phosphotransferase activities of JNK1 was markedly induced in HepG2 cells which were treated with two extracts of Cortex ulmi pumilae. On the contrary, the activation of transcriptional activator, activating protein1(AP-1) and NF-kB were severely decreased by these two extracts of Cortex ulmi pumilae (C.U.P.-C, C.U.P.-K). In addition, antioxidants (GSH and NAC) and intracellular $Ca2^+$ level regulator (Bapta/AM and Thapsigargin) did not affect Cortex ulmi pumilae extracts-induced apoptotic death of HepG2 cells. Conclusions : In conclusion, our results suggest that two extracts of Cortex ulmi pumilae (C.U.P.-C, C.U.P.-K) induces the apoptotic death of human liver origin hepatoma HepG2 cells via activation of caspase 3-like proteases as well as JNK1, and inhibition of transcriptional activators, AP-1 and $NK-{\kappa}B$.

• IMMUNE NETWORK
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• 제11권1호
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• pp.79-94
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• 2011

Background: Dendritic cell (DC)-based vaccines are currently being evaluated as a novel strategy for tumor vaccination and immunotherapy. However, inducing long-term regression in established tumor-implanted mice is difficult. Here, we show that deoxypohophyllotoxin (DPT) induces maturation and activation of bone marrow-derived DCs via Toll-like receptor (TLR) 4 activation of MAPK and NF-${\kappa}B$. Methods: The phenotypic and functional maturation of DPT-treated DCs was assessed by flow cytometric analysis and cytokine production, respectively. DPT-treated DCs was also used for mixed leukocyte reaction to evaluate T cell-priming capacity and for tumor regression against melanoma. Results: DPT promoted the activation of $CD8^+$ T cells and the Th1 immune response by inducing IL-12 production in DCs. In a B16F10 melanoma-implanted mouse model, we demonstrated that DPT-treated DCs (DPT-DCs) enhance immune priming and regression of an established tumor in vivo. Furthermore, migration of DPT-DCs to the draining lymph nodes was induced via CCR7 upregulation. Mice that received DPT-DCs displayed enhanced antitumor therapeutic efficacy, which was associated with increased IFN-${\gamma}$ production and induction of cytotoxic T lymphocyte activity. Conclusion: These findings strongly suggest that the adjuvant effect of DPT in DC vaccination is associated with the polarization of T effector cells toward a Th1 phenotype and provides a potential therapeutic antitumor immunity.

• BMB Reports
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• 제53권6호
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• pp.323-328
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• 2020

Matrix metalloproteinase 1 (MMP-1), a calcium-dependent zinccontaining collagenase, is involved in the initial degradation of native fibrillar collagen. Tissue necrosis factor-alpha (TNFα) is a pro-inflammatory cytokine that is rapidly produced by dermal fibroblasts, monocytes/macrophages, and keratinocytes and regulates inflammation and damaged-tissue remodeling. MMP-1 is induced by TNFα and plays a critical role in tissue remodeling and skin aging processes. However, the regulation of the MMP1 gene by TNFα is not fully understood. We aimed to find additional cis-acting elements involved in the regulation of TNFα-induced MMP1 gene transcription in addition to the nuclear factor-kappa B (NF-κB) and activator protein 1 (AP1) sites. Assessments of the 5'-regulatory region of the MMP1 gene, using a series of deletion constructs, revealed the requirement of the early growth response protein 1 (EGR-1)-binding sequence (EBS) in the proximal region for proper transcription by TNFα. Ectopic expression of EGR-1, a zinc-finger transcription factor that binds to G-C rich sequences, stimulated MMP1 promoter activity. The silencing of EGR-1 by RNA interference reduced TNFα-induced MMP-1 expression. EGR-1 directly binds to the proximal region and transactivates the MMP1 gene promoter. Mutation of the EBS within the MMP1 promoter abolished EGR-1-mediated MMP-1 promoter activation. These data suggest that EGR-1 is required for TNFα-induced MMP1 transcriptional activation. In addition, we found that all three MAPKs, ERK1/2, JNK, and p38 kinase, mediate TNFα-induced MMP-1 expression via EGR-1 upregulation. These results suggest that EGR-1 may represent a good target for the development of pharmaceutical agents to reduce inflammation-induced MMP-1 expression.

• Journal of Applied Biological Chemistry
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• 제65권2호
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• pp.113-120
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• 2022

구슬말(Nostoc commune Vaucher ex Bornet & Flahault)은 이형세포를 갖는 특징으로 다른 목들과 구분되는 남조류의 일종으로 극지방에서 열대지역까지 광범위한 지역에 분포하며 단세포가 연결되어 형성된 수많은 trichome들이 점액질에 둘러 쌓인 형태로 커다란 군체를 형성한다. 주로 토양, 암반, 잔디 위 등에 서식한다고 알려져 있으나 흔히 관찰되지 않기 때문에 현재 연구가 거의 없는 실정이다. 이에 본 연구에서는 토양 남조류인 N. commune HCW0811을 분리 및 동정하였으며 항염증 활성을 조사 하고자 하였다. 그 결과 N. commune HCW0811는 LPS로 유도된 RAW 264.7세포에서 80%이상의 세포 생존율을 나타내었으며 NO, PGE2 및 TNF-α, IL-6, IL-1β의 생성을 효과적으로 억제하였다. 또한 western blot assay를 통해 iNOS, COX-2 및 MAP kinase (p38, ERK1/2, JNK)와 NF-κB 세포내 신호전달 경로에서의 단백질 발현을 조사한 결과 이들의 발현이 유의하게 억제됨을 확인하였다. 본 연구에서는 이러한 결과를 근거하여 HCW0811가 다양한 염증 인자를 표적으로 하는 피부 면역 질환을 포함한 염증성 질환의 예방과 치료를 위한 항염증 기능성 화장품 및 식품소재로의 개발가능성을 제시한다.

• Journal of Ginseng Research
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• 제46권5호
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• pp.628-635
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• 2022

Background: Ulcerative colitis (UC) is the large intestine disease that results in chronic inflammation and ulcers in the colon. Rg3-enriched Korean Red Ginseng extract (Rg3-RGE) is known for its pharmacological activities. Persicaria tinctoria (PT) is also used in the treatment of various inflammatory diseases. The aim of this study is to investigate the attenuating effects of Rg3-RGE with PT on oxazolone (OXA)-induced UC in mice. Methods: A total of six groups of mice including control group, OXA (as model group, 1.5%) group, sulfasalazine (75 mg/kg) group, Rg3-RGE (20 mg/kg) group, PT (300 mg/kg) group, and Rg3-RGE (10 mg/kg) with PT (150 mg/kg) group. Data on the colon length, body weight, disease activity index (DAI), histological changes, nitric oxide (NO) assay, Real-time PCR of inflammatory factors, ELISA of inflammatory factors, Western blot, and flow cytometry analysis were obtained. Results: Overall, the combination treatment of Rg3-RGE and PT significantly improved the colon length and body weight and decreased the DAI in mice compared with the treatment with OXA. Additionally, the histological injury was also reduced by the combination treatment. Moreover, the NO production level and inflammatory mediators and cytokines were significantly downregulated in the Rg3-RGE with the PT group compared with the model group. Also, NLR family pyrin domain containing 3 (NLRP3) inflammasome and nuclear factor kappa B (NF-𝛋B) were suppressed in the combination treatment group compared with the OXA group. Furthermore, the number of immune cell subtypes of CD4⁺ T-helper cells, CD19⁺ B-cells, and CD4⁺ and CD25⁺ regulatory T-cells (Tregs) was improved in the Rg3-RGE with the PT group compared with the OXA group. Conclusion: Overall, the mixture of Rg3-RGE and PT is an effective therapeutic treatment for UC.

• 대한본초학회지
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• 제32권5호
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• pp.1-6
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• 2017

Objectives : Corni Fructus (CF) is traditional herbal medicine used on polyuria, low back pain, and tinnitus. This study aimed to evaluate inhibits skin wrinkle formation effect of CF. Methods : To evaluate the produce inhibition effect of CF, SD-rats were distributed into four groups; normal rats (Nor), AGEs (advenced glycation end product)-induced rats (Con), AGEs-induced rats treated with 100mg/kg CF (CF). To induce AGEs, streptozotocin (50mg/kg) was administered intraperitoneally and after 3 days oral administrated 100mM methyl glyoxal for 3 weeks. Results : The oral administration of CF suppressed the reactive oxygen specis (ROS) in serum. The AGEs in skin tissues was significantly reduced through treatment of CF. Furthermore, the expressions of AGEs related proteins such as polyclonal anti-$N^e$-(carboxymethyl)lysine (CML), anti-$N^e$-(carboxyethyl)lysine (CEL), AGE receptors (RAGE) were decreased in CF treated group compared with the control group in skin tissues. Inflammation-related proteins such as Nuclear factor kappa-light-chain-enhancer of activated B cells (NF-kB), monocyte chemoattractant protein-1 (MCP-1), interleukin-6 (IL-6) reduced in CF treatment group than control group. AGE-induced rats exhibited that the significant decreased collagen however, CF treatment (100mg/kg of body weight) up regulated collagen by improved the expression levels of skin fibril-related genes such as Matrix metalloproteinase (MMP-1). Conclusion : Taken together, our study suggests that CF regulates ROS to prevent accumulation of AGEs and inhibits skin wrinkles. Our finding indicate that CF may be an effective agent for inhibits AGEs formation, and improved skin wrinkle.

• Journal of Microbiology and Biotechnology
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• 제33권4호
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• pp.430-440
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• 2023

The type three secretion system (T3SS) is a major virulence system of Pseudomonas aeruginosa (P. aeruginosa). The effector protein Exotoxin S (ExoS) produced by P. aeruginosa is secreted into the host cells via the T3SS. For the purpose of an experiment on inhibitors with regard to ExoS secretion, we developed a sandwich-type enzyme-linked immunosorbent assay (ELISA) system. Quercetin was selected because it has a prominent ExoS inhibition effect and also is known to have anti-inflammatory and antioxidant effects on mammalian cells. In this study, we investigated the effects of quercetin on the expression and secretion of ExoS using ELISA and Western blot analysis methods. The results showed that the secretion of ExoS was significantly decreased by 10 and 20 µM of quercetin. Also, popB, popD, pscF, and pcrV which are composed of the T3SS needle, are reduced by quercetin at the mRNA level. We also confirmed the inhibitory effect of quercetin on cytokines (IL-6, IL-1β, and IL-18) in P. aeruginosa-infected H292 cells by real-time polymerase chain reaction (PCR) and ELISA. Collectively, quercetin inhibits the secretion of ExoS by reducing both ExoS production and the expression of the needle protein of T3SS. Furthermore, these results suggest that quercetin has the potential to be used as an anti-toxic treatment for the inflammatory disease caused by P. aeruginosa infection.

• 생명과학회지
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• 제30권9호
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• pp.804-812
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• 2020

본 연구에서는 아메리카왕거저리에 대한 기능성 연구의 일환으로 아메리카왕거저리 유충의 유전체 분석을 통해 선별된 조포바신 1의 항균 및 항염증 활성을 확인하였다. 선행연구에서 RNA 시퀀싱을 통해 아메리카왕거저리의 전사체를 분석하였으며, 결과를 바탕으로 인실리코(in silico) 분석을 수행하여 전사체 유래 항균 펩타이드를 스크리닝하고 선발하였다. 수행된 항균활성 및 용혈활성 테스트에서 조포바신 1은 세균 및 칸디다 진균에 대해 광범위한 항균활성을 나타낸 반면 마우스 적혈구에 대한 용혈활성은 전혀 없었다. 다음으로 마우스 대식세포주 Raw264.7 세포를 이용하여 조포바신 1의 항염증활성을 확인하였다. 그 결과 조포바신 1은 LPS로부터 유도된 Raw264.7 세포들의 산화질소 생성을 감소시키는 결과를 보여주었다. 뿐만 아니라 실시간 역전사 중합효소 연쇄반응(qRT-PCR) 방법과 효소결합면역흡착측정법(ELISA)을 통해 조포바신 1이 Raw264.7 세포에서 전염증성 사이토카인(IL-6, IL-1β)의 발현을 감소시킨다는 것을 확인할 수 있었다. 또한 염증반응의 신호전달인자들(MAPKs, NF-κB)의 인산화를 억제하는 것을 확인하였다. 게다가 조포바신 1은 LPS와의 상호작용을 통해 결합한다는 것을 확인하였다. 이러한 연구결과들은 아메리카왕거저리 유전체 분석을 통해 확인된 조포바신 1이 항균 및 항염증 치료를 위한 물질로서 개발하는데 가능성이 있을 것으로 사료된다.

• 생명과학회지
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• 제30권10호
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• pp.886-895
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• 2020

본 연구에서는 호랑나비 유충의 유전체 분석을 통해 선별된 파필리오신 3의 항균 및 항염증 활성을 확인하였다. 선행연구에서 RNA 시퀀싱 분석을 통해 호랑나비의 전사체를 분석하였으며, 결과를 바탕으로 인실리코(in silico) 분석을 진행하여 전사체 유래 항균 펩타이드를 스크리닝하고 선발하였다. 수행된 항균 활성 및 용혈 활성 테스트에서 파필리오신 3은 그람음성균인 E. coli와 그람양성균인 S. aureus에 대해 강력한 항균활성을 나타낸 반면 마우스 적혈구에 대한 용혈 활성은 전혀 없었다. 다음으로 마우스 대식세포주 Raw264.7 세포를 이용하여 파필리오신 3의 항염증 활성을 확인하였다. 그 결과 파필리오신 3은 LPS로부터 유도된 Raw264.7 세포들의 산화질소 생성을 감소시키는 결과를 보여주었다. 뿐만 아니라 실시간 역전사 중합효소 연쇄반응(qRT-PCR) 방법과 효소결합면역흡착측정법(ELISA)을 통해 파필리오신 3이 Raw264.7 세포에서 전염증성 사이토카인(IL-6, IL-1β)의 발현을 감소시킨다는 것을 확인할 수 있었다. 또한, 염증반응의 신호전달인자들(MAPKs, NF-κB)의 인산화를 억제하는 것을 확인하였는데, 이는 파필리오신 3이 LPS와의 상호작용을 통해 결합하여 효과를 나타낸다는 것을 확인할 수 있었다. 이러한 결과들은 호랑나비 유전체 분석을 통해 확인된 파필리오신 3이 새로운 항균 및 항염증 치료제로서 개발하는데 가능성 있는 물질로 사료된다.