• 제목/요약/키워드: macrophage.

검색결과 2,505건 처리시간 0.038초

반하 추출물의 종양연관대식세포 조절을 통한 암세포 이동능 저해 효과 (The Tuber Extract of Pinellia ternata (Thunb.) Brei Suppresses Cancer Cell Migration by Regulating Tumor-associated Macrophages)

  • 박신형
    • 동의생리병리학회지
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    • 제36권1호
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    • pp.1-6
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    • 2022
  • The tuber of Pinellia ternata (Thunb.) Brei (TPT) used in traditional Oriental medicine for the treatment of cough, sputum, vomiting, and insomnia, possesses antioxidant, antibacterial, and anti-inflammatory effects. Although recent studies have reported the anticancer effects of TPT in several cancer cells, it is still unclear whether TPT regulates tumor-associated macrophage (TAM) characterized by the immunosuppressive M2 macrophage phenotype. Our results showed that the ethanol extract of TPT (ETPT) suppressed the migration of RAW264.7 mouse macrophage cells and THP-1 human monocytes differentiated into macrophages towards the conditioned media (CM) collected from lung cancer cells, suggesting that ETPT would attenuate the recruitment of macrophages into tumors. In addition, ETPT suppressed the interleukin (IL)-4 or IL-6-induced M2 macrophage polarization in RAW264.7 cells. ETPT treatment not only downregulated the mRNA expression of M2 macrophage markers including arginase-1, mannose receptor C type 1 (MRC-1), and IL-10, but also inhibited the phosphorylation of signal transducer and activator of transcription 3 (STAT3) and STAT6, general regulators of M2 macrophage polarization. Finally, the transwell assay results showed that the CM from M2-polarized RAW264.7 cells increased the migration of mouse lewis lung carcinoma (LLC) cells, while those from RAW264.7 cells co-treated with ETPT and IL-6 significantly reduced the migration of LLC cells. Taken together, our observations clearly demonstrate that ETPT suppressed the cancer cell migration by regulating macrophage recruitment and M2 macrophage polarization.

Macrophage activation by glycoprotein isolated from Dioscorea batatas

  • Huong, Pham Thi Thu;Jeon, Young-Jin
    • Toxicological Research
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    • 제27권3호
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    • pp.167-172
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    • 2011
  • We demonstrate that glycoprotein isolated from Dioscorea batatas (GDB) activates macrophage function. Analysis of the infiltration of macrophages into peritoneal cavity showed GDB treatment significantly increased the recruitment of macrophages into the peritoneal cavity. In order to further confirm and investigate the mechanism of GDB on macrophage activation, we analyzed the effects of GDB on the cytokine expression including IL-$1{\beta}$, TNF-${\alpha}$, and IL-6 in mouse peritoneal macrophages. GDB increased the expression of IL-$1{\beta}$, TNF-${\alpha}$, and IL-6. Cytokine induction by GDB was further confirmed by RT-PCR and ELISA in mouse macrophage cell line, RAW264.7 cells. Treatment of RAW264.7 cells with GDB produced strong induction of NF-${\kappa}B$ DNA binding and MAPK phosphorylation, markers for macrophage activation and important factors for cytokine gene expression. Collectively, this series of experiments indicates that GDB stimulates macrophage activation.

Genistein이 T lymphocyte의 Apoptosis 및 복강 Macrophage의 탐식능에 미치는 영향 (Effect of Genistein on Apoptosis of T Iymphocyte and Phagocytosis of Peritoneal Macrophage)

  • 은재순;조선경;이택렬;김대근;오찬호;소준노
    • 약학회지
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    • 제46권1호
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    • pp.69-74
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    • 2002
  • The effects of genistein on murine thymocytes for inducing apoptotic cell death and phagocytic activity of peritoneal macrophage were studied in vitro. Addition of genistein (10 and 50$\mu$M) to cultured thymocytes from BALB/c mice definitely promoted DNA fragmentation. Also, cytofluorometric analysis of these cells demonstrated a reduction in mitochondrial transmembrane potential ($\Delta$Ψm). But, repeated administration of genistein (1 mg/mouse/day) to mice for 7 days did not cause any detectable DNA fragmentation. Genistein decreased lucigenin chemiluminescence and engulfment of fluorescein-conjugated E. coli particles in peritoneal macrophage. These results suggest that genistein induce an apoptosis of thymocyte via reduction in $\Delta$Ψm and decrease phagocytic activity of peritoneal macrophage in vitro.

지단백산화(脂蛋白酸化)에 따른 대식세포(大食細胞) 활성(活性)에 미치는 삼기음(三氣飮)의 영향(影響) (Effects of Samkieum on LDL Oxidation in Macrophage Cell)

  • 이희조;황귀서;김경준
    • 한방안이비인후피부과학회지
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    • 제19권2호
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    • pp.108-117
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    • 2006
  • The oxidative notification of low density lipoprotein(LDL) has been implicated in the development of atherosclerosis. Oxidized LDL are found in macrophage foam cell, and it can induce an macrophage proliferation in atherosclerotic plaque. In this study, we investigated the hypothesis that Samkieum may reduce atherosclerosis by lowering the oxidiazability of LDL, To achieve this goal, we examined the effect of Samkieum on LDL oxidation nitric oxide production in mouse macrophage cell line, RAW264.7, and the effect of Samkieum on cupuric sulfate-induced cytotoxicity, LDH release, and macrophage activity. Samkieum inhibited the generation of oxidized LDL from native LDL in RAW264.7 cell culture, and decreased the release of LDH from cupric sulfate-stimulated RAW264.7 cell. In other experiments, Samkieum activated RAW264.7 cell, and prolonged the survival time, and increased nitric oxide production in Raw 264.7 cells.

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Ethyl Acetate Fraction of Adenophora triphylla var. japonica Inhibits Migration of Lewis Lung Carcinoma Cells by Suppressing Macrophage Polarization toward an M2 Phenotype

  • Park, Shin-Hyung
    • 대한약침학회지
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    • 제22권4호
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    • pp.253-259
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    • 2019
  • Objectives: It is reported that tumor-associated macrophages (TAMs) contribute to cancer progression by promoting tumor growth and metastasis. The purpose of this study is to investigate the effect of different fractions of Adenophora triphylla var. japonica (AT) on the polarization of macrophages into the M2 phenotype, a major phenotype of TAMs. Methods: We isolated hexane, ethyl acetate, and butanol fractions from crude ethanol extract of AT. The cytotoxicity of AT in RAW264.7 cells was examined by 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. RAW264.7 cells were polarized into the M2 phenotype by treatment with interleukin (IL)-4 and IL-13. The expression of M2 macrophage marker genes was detected by reverse transcription polymerase chain reaction (RT-PCR). The phosphorylation level of signal transducer and activator of transcription 6 (STAT6) was investigated by western blot analysis. The migration of Lewis lung carcinoma (LLC) cells was examined by transwell migration assay using conditioned media (CM) collected from RAW264.7 cells as a chemoattractant. Results: Among various fractions of AT, the ethyl acetate fraction of AT (EAT) showed the most significant suppressive effect on the mRNA expression of M2 macrophage markers, including arginase-1, interleukin (IL)-10 and mannose receptor C type 1 (MRC-1), up-regulated by treatment of IL-4 and IL-13. In addition, EAT suppressed the phosphorylation of STAT6, a critical regulator of IL-4 and IL-13-induced M2 macrophage polarization. Finally, the increased migration of Lewis lung carcinoma (LLC) cells by CM from M2-polarized RAW264.7 cells was reduced by CM from RAW264.7 cells co-treated with EAT and M2 polarization inducers. Conclusion: We demonstrated that EAT attenuated cancer cell migration through suppression of macrophage polarization toward the M2 phenotype. Additional preclinical or clinical researches are needed to evaluate its regulatory effects on macrophage polarization and anti-cancer activities.

Induction of heme oxygenase-1 with dietary quercetin reduces obesity-induced hepatic inflammation through macrophage phenotype switching

  • Kim, Chu-Sook;Choi, Hye-Seon;Joe, Yeonsoo;Chung, Hun Taeg;Yu, Rina
    • Nutrition Research and Practice
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    • 제10권6호
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    • pp.623-628
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    • 2016
  • BACKGROUND/OBJECTIVES: Obesity-induced steatohepatitis accompanied by activated hepatic macrophages/Kupffer cells facilitates the progression of hepatic fibrinogenesis and exacerbates metabolic derangements such as insulin resistance. Heme oxyganase-1 (HO-1) modulates tissue macrophage phenotypes and thus is implicated in protection against inflammatory diseases. Here, we show that the flavonoid quercetin reduces obesity-induced hepatic inflammation by inducing HO-1, which promotes hepatic macrophage polarization in favor of the M2 phenotype. MATERIALS/METHODS: Male C57BL/6 mice were fed a regular diet (RD), high-fat diet (HFD), or HFD supplemented with quercetin (HF+Que, 0.5g/kg diet) for nine weeks. Inflammatory cytokines and macrophage markers were measured by ELISA and RT-PCR, respectively. HO-1 protein was measured by Western blotting. RESULTS: Quercetin supplementation decreased levels of inflammatory cytokines ($TNF{\alpha}$, IL-6) and increased that of the anti-inflammatory cytokine (IL-10) in the livers of HFD-fed mice. This was accompanied by upregulation of M2 macrophage marker genes (Arg-1, Mrc1) and downregulation of M1 macrophage marker genes ($TNF{\alpha}$, NOS2). In co-cultures of lipid-laden hepatocytes and macrophages, treatment with quercetin induced HO-1 in the macrophages, markedly suppressed expression of M1 macrophage marker genes, and reduced release of MCP-1. Moreover, these effects of quercetin were blunted by an HO-1 inhibitor and deficiency of nuclear factor E2-related factor 2 (Nrf2) in macrophages. CONCLUSIONS: Quercetin reduces obesity-induced hepatic inflammation by promoting macrophage phenotype switching. The beneficial effect of quercetin is associated with Nrf2-mediated HO-1 induction. Quercetin may be a useful dietary factor for protecting against obesity-induced steatohepatitis.

C 반응성 단백질이 사람 Macrophage 탐식 기능에 미치는 영향 (Modulation of Human Macrophage Phagocytic Activity by C-reactive Protein)

  • 김용호;강신원
    • 대한의생명과학회지
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    • 제4권1호
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    • pp.35-42
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    • 1998
  • 치료목적으로 채취한 사람 복수에서 C반응성 단백질 (CRP)을 분리 정제하여 사람 대식세포 탐식활성에 미치는 영향에 대하여 연구하였다. CRP는 p-diazonium phenyl-phosphoryl choline 혹은 C-polysaccharide coupled sepharose 4B와 hydroxylapatite affinity chromatography법으로 분리 정제 시켰다. 대식 세포는 ficoll hypaque 밀도 원심 구배법으로 분리시킨 다음 부착법으로 정제시키고 탐식 시험을 이용하여 확인하였다. CRP가 대식 세포의 시험 관내 미생물 탐식 활성에 미치는 영향은 촉진 혹은 억제시키는 경향을 보였다. 즉, CRP와 대식세포 미생물 탐식능과의 관계는 반응시킨 시간, 반응계에 가해준 CRP량, 미생물ㆍ탐식세포 및 CRP상호간 반응시킨 순서에 따라서 다르게 나타났다. 대식세포의 시험관내 탐식활성에 미치는 CRP 자극의 특성은 한계자극 특성을 보였다.

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홍화(Carthamus tinctorius L.)잎으로부터 분리한 다당류의 Macrophage 활성화에 대한 연구 (Study of Macrophage Stimulating Activity of the Polysaccharide Isolated from Leaves of Carthamus tinctorius L.)

  • 곽지은;김경임;전혁;홍범식;조홍연;양한철
    • 한국식품영양과학회지
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    • 제31권3호
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    • pp.527-533
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    • 2002
  • 전통차 제조용 식물 63종을 대상으로 macrophage lysosomal enzyme activity를 검색한 결과, 홍화 냉수 추출물에서 높은 macrophage lysosomal enzyme 활성 (219%)을 발견하여 냉수 추출물 CT-0 획분에 대하여 metahnol 환류, ethanol 침전, 투석, 동결건조를 실시하여 macrophage lysosomal enzyme 활성이 더욱 증가된(227%) 고분자 획분 CT-1을 얻었다. 이 획분의 macrophage활성화 성분의 본체를 파악하기 위하여 pronate처리에 의한 단백질 분해와 periodate를 이용한 당 부위의 선택적 실활 후 활성을 검토한 결과, pronase를 처리한 CT-1에서는 약 8% 정도의 활성 증가를 보인반면 periodate 산화물에서는 활성이 약 8% 정도 감소되는 것으로 보아 홍화로부터 macrophage 활성을 나타내는 냉수 추출물의 활성 본체는 다당임을 알 수 있었다. 조다당 활성획분에 대하여 anion exchange column chromatography를 실시하여 9개의 획분(CT-1-I~CT-1-VIII)을 얻었으며 수율과 활성이 가장 높은 CT-1-IIa 획분을 Sepharose CL-6B 및 Sephacrl S-200의 gel permeation chromatography를 수행하여 주요 활성 다당인 CT-1-IIa-2-1을 최종적으로 정제하였다. HPLC상에서 순수한 단일 peak로 확인된 CT-1-IIa-2-1은 분자량이 68 kDa정도의 다당인 것으로 나타났고 macrophage의 lysosomal enzyme 활성은 대조군을 100%로 비교했을 때 243%를 나타내었다. 또한 구성당의 조성은 xylose(27.4%), arabinose(16.1%), mannose(15.9%), glucose(14.5%)의 순이었다. 본 연구에서 CT-1-IIa-2-1은 macrophage의 면역활성을 증가시키는 물질임이 확인되었으나 mouse를 대상으로 급성독성 검사를 실시한 결과 LD$_{50}$값이 397mg/kg으로 일정 농도 이상의 고농도에서는 독성을 나타냈다. 따라서 본 시료에 대하여 아만성.만성 독성과 유전 및 면역 독성과 같은 구체적인 독성 검사를 실시하여 안전농도를 산출한다면, 면역증강물질로의 개발이 가능할 것으로 사료된다.다.

돼지에서 분리된 Lactobacillus Strains의 균체분해산물에 의한 RAW 264.7 Macrophage 활성화 (Activation of RAW 264.7 Macrophage by Digested Bacterial Cell of Pig-derived Lactobacillus Strains)

  • 김동운;조성백;정하연;문홍길;이현정;황보종;정완태;최창원;정일병
    • Journal of Animal Science and Technology
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    • 제47권6호
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    • pp.947-954
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    • 2005
  • 경구로 섭취된 생균제가 소화관 효소의 작용을 받은 경우 장관면역계의 macrophage에 미치는 영향을 조사하기 위하여 돼지의 장내에서 분리된 lactobacilli를 pepsin과 pancreatin과 같은 소화관 효소로 분해한 균체분해산물에 의해 RAW 264.7 murine macrophage에서 유도되는 NO, TNF-$\alpha$ 및 IL-6의 생성을 측정하였다. Macrophage에서 유도되는 NO, TNF-$\alpha$ 및 IL-6는 균종과 균체분해산물의 양에 따라 달랐다. NO의 생성수준은 10~150 ug/ml의 분해물에서 관찰 되었으나 TNF-$\alpha$와 IL-6는 50~300 ug/ml의 고농도처리에서 나타났다. 6개의 Lactobacillus strains 중에서 3149와 3156 균주는 다른 균주에 비해 TNF-$\alpha$와 IL-6 유도능이 높았다. 또한 소화관 효소에 의해 분해된 lactobacilli의 균체분해산물의 성분이 macrophage 활성 증가와 관련이 있으며 생체내에서 숙주면역계를 조절할 것으로 사료된다. 본 시험에서 사용한 방법은 소화관 면역계에 미치는 유산균의 효과를 규명하는데 유익할 것이다.

해당화의 과육 및 종자추출물의 대식세포 면역조절작용 (Immunomodulatory Effects of Fructus and Semen from Rosa rugosa on Macrophages)

  • 강남성;손은화
    • 한국자원식물학회지
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    • 제23권5호
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    • pp.399-405
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    • 2010
  • 현재 임상적으로 적용되고 있는 항암요법들은 많은 부작용을 가지고 있으며, 부작용에 의하여 또다른 질환을 야기하는 것이 항암치료에서 문제점으로 지적되고 있다. 따라서 부작용을 줄이고 항암요법을 유지시키는 방법으로, 인체 안전하다고 보고된 천연물을 이용하여 면역력을 증가시킴으로써 인체내 항암 효과를 나타내게 하는 BRM들을 개발하는 연구가 큰 의미를 지닌다. 이에 본 연구에서는 민간요법으로 이미 사용되고 있는 해당화의 macrophage의 활성화에 대한 BRM 효과를 확인하였으며, 특히 과육(RRF)과 종자(RRS)의 부위별 추출물로 그 효과를 비교 분석하였다. RRF는 암세포 자체에 대한 세포독성은 나타내지 않았으나, macrophage의 활성화에 의한 항암 효과를 나타내었다. 이러한 항암 효과는 macrophage의 활성화에 의한 증가되는 NO 및 TNF-$\alpha$와 같은 암세포 독성물질에 의한 효과를 기대할 수 있으나, RRF 처리에 의하여 활성화된 macrophage는 NO 분비에 효과를 나타내지 않았다. RRF의 처리는 TNF-$\alpha$ 분비를 증가시켰으나, macrophage의 활성화에 의해 암세포 독성을 나타내지 않았던 RRS에서도 TNF-$\alpha$ 분비가 증가한 것으로 보아 TNF-$\alpha$ 분비만으로는 macrophage의 항암효과에 직접적인 영향을 나타내지는 않는 것으로 보인다. 본 연구 결과들은 종합해 볼 때, RRF는 RRS와는 달리 macrophage를 활성화하여 항암효과를 나타내었으며, phagocytosis 능력도 증가시켰다. RRF는 TNF-$\alpha$ 등의 분비조절과 같이 RRS와는 다르게 macrophage를 활성화시키는 것으로 보이며, 임상적으로 적용시 RRF가 RRS보다 세포독성 측면에서도 안전하고, macrophage의 활성화 효과 측면에서도 유의성이 높을 것으로 평가 된다.