• 대한한방소아과학회지
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• 제34권4호
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• pp.22-30
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• 2020

Objectives This study was conducted to confirm the inhibitory effect of β-glucan on epithelial inflammation induced by atopic dermatitis through Endocannabinoid system (ECS) activity. Methods Six-week-old NC/Nga mice were divided into a control group (Ctrl), atopic dermatitis elicitation group (ADE), and a β-glucan-treated group (β-glucan treatment after atopy dermatitis elicitation, β-GT). After 3 weeks, CB1, CB2, and GPR55 were observed to confirm the regulation of ECS activity, and filaggrin in the stratum corneum and Kallikrein-related peptidase (KLK) 7 in the stratum corneum and protease activated receptor (PAR)-2 were observed to confirm the inhibition of the inflammation, Phosphorylated extracellular signal-related kinase (p-ERK), Phosphorylated mammalian target of rapamycin (p-mTOR), and E-Cadherin were observed to confirm microenvironmental regulation. Results β-GT was significantly increased in CB1, CB2, and GPR55 positive reactions compared to that of the ADE. In positive reaction of the filaggrin in the stratum corneum, β-GT was significantly increased than that of the ADE. For KLK7 positive and PAR2 positive, β-GT was significantly reduced compared to the ADE. The p-ERK-positive and p-mTOR-positive reactions were significantly reduced in β-GT than in ADE. E-cadherin positive reaction was significantly increased in β-GT than in ADE (All p < 0.01). Conclusions It was confirmed that β-glucan has the effect of inhibiting the epithelium induced by atopic dermatitis through the ECS activity.

• Journal of Korean Neurosurgical Society
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• 제43권2호
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• pp.97-104
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• 2008

Objective: Transient receptor potential vanilloid subfamily type 1 (TRPV1), a most specific marker of the nociceptive primary afferent, is expressed in peptidergic and non-peptidergic primary afferents innervating skin and viscera. However, its expression in sensory fibers to skeletal muscle is not well known. In this study, we studied the neurochemical characteristics of TRPV1-positive primary afferents to skeletal muscles. Methods: Sprague-Dawley rats were injected with total $20{\mu}l$ of 1% fast blue (FB) into the gastrocnemius and erector spinae muscle and animals were perfused 4 days after injection. FB-positive cells were traced in the L4-L5 (for gastrocnemius muscle) and L2-L4 (for erector spinae muscle) dorsal root ganglia. The neurochemical characteristics of the muscle afferents were studied with multiple immunofluorescence with TRPV1, calcitonin gene-related peptide (CGRP) and $P2X_3$. To identify spinal neurons responding to noxious stimulus to the skeletal muscle, 10% acetic acids were injected into the gastrocnemius and erector spinae muscles and expression of phospho extracellular signal-regulated kinase (pERK) in spinal cords were identified with immunohistochemical method. Results: TRPVl was expressed in about 49% of muscle afferents traced from gastrocnemius and 40% of erector spinae. Sixty-five to 60% of TRPV1-positive muscles afferents also expressed CGRP. In contrast, expression of $P2X_3$ immnoreaction in TRPV1-positive muscle afferents were about 20%. TRPV1-positive primary afferents were contacted with spinal neurons expressing pERK after injection of acetic acid into the muscles. Conclusion: It is consequently suggested that nociception from skeletal muscles are mediated by TRPV1-positive primary afferents and majority of them are also peptidergic.

• Nutrition Research and Practice
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• 제16권5호
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• pp.577-588
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• 2022

BACKGROUND/OBJECTIVES: Poorly regulated inflammation is believed to be the most predominant factor that can result in a wide scope of diseases including atopic dermatitis (AD). Despite many studies on the effect of pear pomace in obesity-related disorders including dysregulated gut microbiota, the protective effect of pear pomace in AD is still unknown. This study aimed to evaluate the effect of pear pomace ethanol extract (PPE) on AD by inhibiting inflammation. MATERIALS/METHODS: In the in vivo experiment, 2, 4-dinitrochlorobenzene (DNCB) was applied to NC/Nga mice to induce AD-like skin lesions. After the induction, PPE was administered daily by oral gavage for 4 weeks. The clinical severity score, serum IgE levels, spleen weight, histological changes in dorsal skin, and inflammation-related proteins were measured. In the cell study, RAW 264.7 cells were pretreated with PPE before stimulation with lipopolysaccharide (LPS). Nitrite oxide (NO) production and nuclear factor kappa B (NF-𝛋B) protein expression were detected. RESULTS: Compared to the AD control (AD-C) group, IgE levels were dramatically decreased via PPE treatment. PPE significantly reduced scratching behavior, improved skin symptoms, and decreased ear thickness compared to the AD-C group. In addition, PPE inhibited the DNCB-induced expression of inducible nitrite oxide synthase (iNOS), the receptor for advanced glycation end products, extracellular signal-regulated kinase (ERK) 1/2, and NF-𝛋B. PPE inhibited the LPS-induced overproduction of NO and the enhanced expression of iNOS and cyclooxygenase-2. Moreover, the phosphorylation of ERK1/2 and NF-𝛋B in RAW 264.7 cells was suppressed by PPE. CONCLUSIONS: These results suggest that PPE could be explored as a therapeutic agent to prevent AD.

• Journal of Microbiology and Biotechnology
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• 제18권6호
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• pp.1170-1178
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• 2008

The cyclopentenone prostaglandins (cyPGs) prostaglandin $A_1$ ($PGA_1$) and 15-deoxy-${\Delta}^{12,14}$-prostaglandin $J_2$ (15d-$PGJ_2$) have been reported to exhibit antiinflammatory activity in activated monocytes/macrophages. However, the effects of these two cyPGs on the expression of cytokine genes may differ. In this study, we investigated the mechanism of action of $PGA_1$ in lipopolysaccharide (LPS)-induced expression of inter leu kin (IL)-10 mRNA in mouse peritoneal macrophages. 15d-$PGJ_2$ inhibited expression of LPS-induced IL-10, whereas $PGA_1$ increased LPS-induced IL-10 expression. This synergistic effect of $PGA_1$ on LPS-induced IL-10 expression reached a maximum as early as 2 h after simultaneous $PGA_1$ and LPS treatment ($PGA_1$/LPS), and did not require new protein synthesis. The synergistic effect of $PGA_1$ was inhibited by GW9662, a specific peroxisome proliferator-activated receptor ${\gamma}(PPAR{\gamma})$ antagonist, and Bay-11-7082, a NF-${\kappa}B$ inhibitor. The extracellular signal-regulated kinases (ERK) inhibitor PD98059 increased the expression of $PGA_1$/LPS-induced IL-10 mRNA, rather than inhibiting the IL-10 expression. Moreover, $PGA_1$ inhibited LPS-induced ERK phosphorylation. The synergistic effect of $PGA_1$ on LPS-induced IL-10 mRNA and protein production was inhibited by p38 inhibitor PD169316, and $PGA_1$ increased LPS-induced p38 phosphorylation. In the case of stress-activated protein kinase/c-Jun $NH_2$-terminal kinase (SAPK/JNK), the SAPK/JNK inhibitor SP600125 did not inhibit IL-10 mRNA synthesis but inhibited the production of IL-10 protein remarkably. These results suggest that the synergistic effect of $PGA_1$ on LPS-induced IL-10 expression is NF-${\kappa}B$-dependent and mediated by mitogen-activated protein (MAP) kinases, p38, and SAPK/JNK signaling pathways, and also associated with the $PPAR{\gamma}$ pathway. Our data may provide more insight into the diverse mechanisms of $PGA_1$ effects on the expression of cytokine genes.

• The Korean Journal of Physiology and Pharmacology
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• 제19권2호
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• pp.159-165
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• 2015

Input signals originating from baroreceptors and vestibular receptors are integrated in the rostral ventrolateral medulla (RVLM) to maintain blood pressure during postural movement. The contribution of baroreceptors and vestibular receptors in the maintenance of blood pressure following hypotension were quantitatively analyzed by measuring phosphorylated extracellular regulated protein kinase (pERK) expression and glutamate release in the RVLM. The expression of pERK and glutamate release in the RVLM were measured in conscious rats that had undergone bilateral labyrinthectomy (BL) and/or sinoaortic denervation (SAD) following hypotension induced by a sodium nitroprusside (SNP) infusion. The expression of pERK was significantly increased in the RVLM in the control group following SNP infusion, and expression peaked 10 min after SNP infusion. The number of pERK positive neurons increased following SNP infusion in BL, SAD, and BL+SAD groups, although the increase was smaller than seen in the control group. The SAD group showed a relatively higher reduction in pERK expression when compared with the BL group. The level of glutamate release was significantly increased in the RVLM in control, BL, SAD groups following SNP infusion, and this peaked 10 min after SNP infusion. The SAD group showed a relatively higher reduction in glutamate release when compared with the BL group. These results suggest that the baroreceptors are more powerful in pERK expression and glutamate release in the RVLM following hypotension than the vestibular receptors, but the vestibular receptors still have an important role in the RVLM.

• 한국미생물학회:학술대회논문집
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• 한국미생물학회 2004년도 International Meeting of the Microbiological Society of Korea
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• pp.141-146
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• 2004

SPIN90 was identified to farm molecular complex with $\betaPIX$, WASP and Nck. This complex shows that SPIN90 interacts with Nck in a manner dependent upon cell adhesion to extracellular matrix, but $SPIN90{\cdot}{\beta}PIX{\cdot}WASP$ complex was stable even in suspended cells. This suggests that SPIN90 serves as an adaptor molecule to recruit other proteins to Nck at focal adhesions. SPIN90 was phosphorylated by ERK1, which was, itself, activated by cell adhesion and platelet-derived growth factor. Such phosphorylation of SPIN90 likely promotes the interaction of the $SPIN90{\cdot}{\beta}PIX{\cdot}WASP$ complex and Nck. It thus appears that the interaction of the $SPIN90{\cdot}{\beta}PIX{\cdot}WASP$ complex with Nck is crucial for stable cell adhesion and can be dynamically modulated by SPIN90 phosphorylation that is dependent on cell adhesion and ERX activation. SPIN90 directly binds syndapin I, syndapin isoform II-1 and II-s via its PRD region in vitro, in vivo and also associates with endocytosis core components such as clathrin and dynamin. In neuron and fibroblast, SPIN90 colocalizes with syndapins as puntate form, consistent with a role for SPIN90 in clathrin-mediated endocytosis pathway. Overexpression of SPIN90 N-term inhibits receptor-mediated endocytosis. Interestingly, SPIN90 PRD, binding interface of syndapin, significantly blocks internalization of transferrin, demonstrating SPIN90 involvement in endocytosis in vivo by interacting syndapin. Depletion of endogenous SPIN90 by introducing $\alpha-SPIN90$ also blocks receptor-mediated endocytosis. Actin polymerization could generate farce facilitating the pinch-out event in endocytosis, detach newly formed endocytic vesicle from the plasma membrane or push out them via the cytosol on actin tails. Here we found that SPIN90 localizes to high actin turn over cortical area, actin-membrane interface and membrane ruffle in PDGF treated cells. Overexpression of SPIN90 has an effect on cortical actin rearrangement as filopodia induction and it is mediated by the Arp2/3 complex at cell periphery. Consistent with a role in actin organization, CFP-SPIN90 present in actin comet tail generated by PIP5 $kinase\gamma$ overexpression. Therefore this study suggests that SPIN90 is functional linker between endocytosis and actin cytoskeleton.

• Tuberculosis and Respiratory Diseases
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• 제75권4호
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• pp.140-149
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• 2013

Background: Plasminogen activator inhibitor type 1 (PAI-1), an important regulator of plasminogen activator system which controls degradation of extracellular membrane and progression of tumor cells, and PAI-1 gene polymorphic variants have been known as the prognostic biomarkers of non-small cell lung cancer patients. Recently, experimental in vitro study revealed that transforming growth factor-${\beta}1$ initiated PAI-1 transcription through epithelial growth factor receptor (EGFR) signaling pathway. However, there is little clinical evidence on the association between PAI-1 A15T gene polymorphism and prognosis of Korean population with pulmonary adenocarcinoma and the influence of activating mutation of EGFR kinase domain. Methods: We retrospectively reviewed the medical records of 171 patients who were diagnosed with pulmonary adenocarcinoma and undergone EGFR mutation analysis from 1995 through 2009. Results: In all patients with pulmonary adenocarcinoma, there was no significant association between PAI-1 A15T polymorphic variants and prognosis for overall survival. However, further subgroup analysis showed that the group with AG/AA genotype had a shorter 3-year survival time than the group with GG genotype in patients with EGFR mutant-type pulmonary adenocarcinoma (mean survival time, 24.9 months vs. 32.5 months, respectively; p=0.015). In multivariate analysis of 3-year survival for patients with pulmonary adenocarcinoma harboring mutant-type EGFR, the AG/AA genotype carriers had poorer prognosis than the GG genotype carriers (hazard ratio, 7.729; 95% confidence interval, 1.414-42.250; p=0.018). Conclusion: According to our study of Korean population with pulmonary adenocarcinoma, AG/AA genotype of PAI-1 A15T would be a significant predictor of poor short-term survival in patients with pulmonary adenocarcinoma harboring mutant-type EGFR.

• 생명과학회지
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• 제24권6호
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• pp.664-670
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• 2014

비브리오균(Vibrio vulnificus)은 심각하고 치명적인 감염을 일으킬 수 있는 호염성의 식중독균이지만, 숙주세포 내에서 염증반응을 일으키는 분자적 기작은 아직 잘 알려지지 않았다. 본 연구에서는 오염된 식품 섭취를 통해 유입되는 비브리오균의 소장 특이적 염증 반응 위치와 기작을 알아보기 위해, 7주령의 수컷 마우스에 비브리오균($1{\times}10^9CFU$)을 16시간 동안 경구 투여하였다. 그 결과 비브리오균은 주로 회장(ileum) 부위에서 비브리오균(WT) 수가 가장 많이 증가하였고, 공장(Jejunum), 근위부대장(proximal colon), 원위부 대장(distal colon)에도 유의적으로 군집현성이 이루어짐을 알 수 있었지만, 십이지장(duodenum)과 비장(spleen), 그리고 간(liver) 조직들에서는 관찰되지 않았다. 특히 비브리오균의 표적기관인 회장상피조직에서는 비브리오균(WT)이 침입 시 융모 안으로 다량의 염증세포들이 유입되었고, 융포의 폭이 넓어지고 길이가 짧아지는 전형적인 조직학적 염증 반응을 보여주었다. 비브리오균이 유도한 조직 특이적 염증반응기작을 알아보기 위해, 비브리오에 감염된 회장상피조직으로부터 단백질과 mRNA를 분리하였다. 비브리오균은 숙주세포의 중추적 신호전달 단백질인 protein kinase C (PKC)의 인산화 및 $PKC{\alpha}$의 세포막이동을 촉진시켰고, mitogen-activated protein kinase (MAPK) 중 extracellular signal-regulated kinases (ERK)와 c-Jun N-terminal kinases (JNK)의 인산화를 유도하였지만, p38 MAPK 인산화에는 영향을 미치지 않았다. 특히 비브리오균은 inhibitory factor-kappa B (I-${\kappa}B$)의 활성을 촉진시킴으로써 nuclear factor-kappa B (NF-${\kappa}B$)의 인산화를 유도하였다. 마지막으로 비브리오균(WT)에 감염된 회장의 경우, 정상마우스에 비해 염증성 cytokine인 interleukin (IL)-6, IL-8, tumor necrosis factor (TNF)-${\alpha}$의 mRNA 수준이 유의적으로 증가되었다. 염증매개 수용체인 toll like receptor (TLR)-4, TLR-5, TLR-9의 mRNA의 발현 또한 비브리오균 처리에 의해 증가되어 있음이 관찰되었다. 종합적으로 오염된 식품 섭취를 통해 유입되는 비브리오균은 회장상피세포를 표적으로 염증반응을 일으키며, 그 기작은 PKC, ERK1/2, 그리고 JNK의 인산화를 통한 NF-${\kappa}B$ 활성의 촉진이며, 이로 인한 다양한 염증 매개 단백질 발현의 증가를 통해 이루어진다고 할 수 있다.

• Tuberculosis and Respiratory Diseases
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• 제58권6호
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• pp.590-599
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• 2005

연구배경 : 만성폐쇄성폐질환에서 나타나는 기도점액의 과다분비는 이 질환의 중요한 병리학적 소견이며 호흡곤란 등 환자의 증상을 악화시키는 요인 중의 하나이다. 기도 점액을 구성하는 여러 성분 중 Muc 유전자에 의해 만들어지는 당 단백이 흡연에 의해 생성이 증가하는데 이에 관여하는 세포 내 신호전달 과정에 대하여 확실히 밝혀진 바가 없다. 저자는 Muc 유전자 중 인체의 기도에 가장 많이 분비되는 Muc5ac 점액 생성을 담당하는 Muc5ac 유전자의 발현이 흡연에 의하여 증가하는데 관여하는 세포 내 신호전달 과정을 알아보고자 하였다. 재료 및 방법 : 사람 폐선암 세포주인 A549 세포를 배양하여 Muc5ac 유전자의 promotor를 luciferase reporter plasmid를 사용하여 세포 내에 transfection시키고 5% 담배연기 추출물로 자극하여 배양하였다. 또 세포 내 신호전달에 관여하는 표피성장인자 수용체 kinase의 억제제인 AG1478, mitogen-activated protein kinase kinase(MAPKK) 억제제인 PD98059, p38 mitogen-activated protein kinase 억제제인 SB203580으로 각각 전 처치 후 역시 5% 담배연기 추출물로 자극 배양하였다. 배양된 세포에서 단백질을 추출하여 luciferase 분석을 통하여 Muc5ac promoter 활성도를 측정하고 Western blot을 이용하여 표피성장인자 수용체와 mitogen-activated protein kinase (MAPK)인 extracellular signalrelated kinase (ERK)1/2, p38 MAPK, c-Jun N-terminal kinase (JNK)의 발현을 확인하였다. 또 세포에서 RNA를 추출한 후 Muc5ac primer를 이용하여 역전사효소 중합연쇄반응을 수행하여 Muc5ac mRNA 발현을 관찰하였다. 결 과 : 1. Muc5ac promoter를 삽입한 A549 세포를 5% 담배연기 추출물로 자극하였을 때 의의 있게 luciferase 활성도가 증가하였고(P<0.001) 자극하는 시간이 3시간이었을 때 luciferase 활성도가 최고치를 보였다(P<0.01). 또 담배연기 추출물 자극은 표피성장인자 수용체를 인산화시켰으며 인산화는 AG1478과 PD98059에 의하여 억제되었다. 2. AG1478 혹은 PD98059로 전 처치 후 5% 담배연기 추출물로 자극한 경우 5% 담배연기 추출물 단독으로 자극한 것에 비하여 유의하게 lucifearse 활성도가 억제되었고 (P<0.01) 세 가지 종류의 MAPK 중 ERK1/2와 p38 MAPK의 인산화는 관찰되었으나 JNK의 인산화는 관찰되지 않았다. 역전사효소 중합연쇄반응을 이용하여 관찰한 Muc5ac mRNA 발현은 담배연기 추출물에 의해 증가되었고 PD98059와 AG1478에 의하여 역시 억제되었다. 3. 담배연기 추출물에 의하여 인산화 된 ERK1/2는 PD98059에 의하여 인산화가 감소하였고 p38 MAPK의 인산화는 PD98059와 SB203580에 의하여 감소하였으며 이 두 가지 억제제는 모두 luciferase 활성도를 유의하게 억제시켰다(P<0.0001). 결 론 : 담배연기 추출물은 Muc5ac 유전자의 발현을 증가시켜 기도 내 점액 분비를 증가시키며 이는 표피성장인자 수용체를 매개로 ERK1/2와 p38 MAPK를 경유하여 세포 내 신호전달이 이루어진다고 생각된다. 따라서 점액 유전자 활성화를 매개하는 신호전달 과정을 차단하는 약제나 방법이 개발된다면 과도한 점액분비를 치료할 수 있을 것으로 생각한다.

• Clinical and Experimental Reproductive Medicine
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• 제34권1호
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• pp.19-31
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• 2007

목 적: 자궁내막증은 자궁내부에 존재하여야 할 자금내막조직이 자궁 외에 존재하는 질환으로 그 발생기전은 아직 명확하게 밝혀져 있지 않다. 이에 저자들은 자궁내막증 환자와 정상 대조군의 자궁내막조직 간의 유전자 발현의 차이가 자궁내막증의 발병과 관련이 있을 것이라는 가정 하에 DNA microarray 기술을 도입하여 연구를 시행하였다. 연구방법: 2002년 1월부터 2002년 12월까지의 기간 동안 본원 산부인과에서 자궁내막증 환자와 자궁내막증 이외의 다른 부인과적 질환으로 수술을 시행한 환자들을 대상으로 채취한 자궁내막 조직으로 KNU 4.8K cDNA chip을 이용하여 유전자 발현을 비교 연구하였다. 유전자칩으로 자궁내막증 조직에서 발현의 증감을 보였던 유전자 중에서 8종의 유전자를 대상으르 RT-PCR이나 real time RT-PCR 법을 통하여 그 발현 양상을 검증하였다. 결 과: 자궁내막증에 이환된 여성의 자궁내막조직에서 대조군에 비하여 높게 발현되고 있는 것으로 나타난 유전자들은 ATP synthase H transporting F1 (ATP5B), eukaryotic translation elongation factor 1, isocitrate dehydrogenase 1 (NADP+), mitochondrial ribosomal protein L3, ATP synthase H+ trarsporting (ATP5C1), LPS induced TNF-$\alpha$ factor 등으로 세포의 에너지 생성과 대사과정 및 신호전달에 관여하는 유전자들이었다. 한편 자궁내막중 환자의 자궁내막조직에서 대조군에 비하여 낮게 발현된 유전자들은 insulin like growth factor II associated protein, EGF-containing fibulin-like EMP1, matrix Gla protein, TGF beta-induced, TGF beta receptor 1(activin A receptor type II-like kinase), cystallin alpha B, fibulin 5, tissue inhibitor of metalloproteinase 3, collage type XII, alpha 1, tissue inhibitor of metalloproteinase 1, decorin 등으로 세포외기질의 구성 및 기능에 관련이 있었다. 결 론: 이상의 DNA mirroarry 및 RT-PCR을 통해 얻어진 결과에서 자궁내막증의 자궁내막조직에서 대조군에 비하여 유전자들의 발현에 차이가 있음을 확인하였다.