• 제목/요약/키워드: Expression analysis

검색결과 9,053건 처리시간 0.04초

Oxytocin produces thermal analgesia via vasopressin-1a receptor by modulating TRPV1 and potassium conductance in the dorsal root ganglion neurons

  • Han, Rafael Taeho;Kim, Han-Byul;Kim, Young-Beom;Choi, Kyungmin;Park, Gi Yeon;Lee, Pa Reum;Lee, JaeHee;Kim, Hye young;Park, Chul-Kyu;Kang, Youngnam;Oh, Seog Bae;Na, Heung Sik
    • The Korean Journal of Physiology and Pharmacology
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    • 제22권2호
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    • pp.173-182
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    • 2018
  • Recent studies have provided several lines of evidence that peripheral administration of oxytocin induces analgesia in human and rodents. However, the exact underlying mechanism of analgesia still remains elusive. In the present study, we aimed to identify which receptor could mediate the analgesic effect of intraperitoneal injection of oxytocin and its cellular mechanisms in thermal pain behavior. We found that oxytocin-induced analgesia could be reversed by $d(CH_2)_5[Tyr(Me)^2,Dab^5]$ AVP, a vasopressin-1a (V1a) receptor antagonist, but not by $desGly-NH_2-d(CH_2)_5[D-Tyr^2,Thr^4]OVT$, an oxytocin receptor antagonist. Single cell RT-PCR analysis revealed that V1a receptor, compared to oxytocin, vasopressin-1b and vasopressin-2 receptors, was more profoundly expressed in dorsal root ganglion (DRG) neurons and the expression of V1a receptor was predominant in transient receptor potential vanilloid 1 (TRPV1)-expressing DRG neurons. Fura-2 based calcium imaging experiments showed that capsaicin-induced calcium transient was significantly inhibited by oxytocin and that such inhibition was reversed by V1a receptor antagonist. Additionally, whole cell patch clamp recording demonstrated that oxytocin significantly increased potassium conductance via V1a receptor in DRG neurons. Taken together, our findings suggest that analgesic effects produced by peripheral administration of oxytocin were attributable to the activation of V1a receptor, resulting in reduction of TRPV1 activity and enhancement of potassium conductance in DRG neurons.

Stimulative Effects of Hominis Placental Pharmacopuncture Solution Combined with Zinc-oxide Nanoparticles on RAW 264.7 Cells - ZnO HPPS more easily stimulates RAW 264.7 cells -

  • Hong, Tae-Keun;Kim, Jee-Hye;Woo, Ju-Youn;Ha, Ki-Tae;Joo, Myung-Soo;Hahn, Yoon-Bong;Jeong, Han-Sol
    • 대한약침학회지
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    • 제15권3호
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    • pp.13-18
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    • 2012
  • Objectives: The purpose of this study is to examine whether Hominis Placental pharmacopuncture solution (HPPS) combined with zinc-oxide nanoparticles (ZnO NP) activates RAW 264.7 cells. Methods: We soaked ZnO nanoparticles in the Hominis Placenta pharmacopuncture solution, thereby making a combined form (ZnO NP HPPS). The effect of ZnO NP HPPS on the intracellular reactive oxygen species (ROS) production was measured by 2', 7'-dichlorofluorescin diacetate (DCFH-DA) assay. The effect of ZnO NP HPPS on NF-${\kappa}B$ was measured by using a luciferase assay. The effect of ZnO NP HPPS on the cytokine expression was assessed by semi-quantitative reverse transcriptase polymerase chain reaction (RT-PCR). The cellular uptake of ZnO NP HPPS was measured by using a flow cytometric analysis, and cellular structural alterations were analyzed by using transmission electron microscopy (TEM). Results: Neither the HPPS nor the ZnO NPs induced intracellular ROS production in RAW 264.7 cells. Neither of the materials activated NF-${\kappa}B$ or it's dependent genes, such as TNF-${\alpha}$, IL-1, and MCP-1. However, ZnO NP HPPS, the combined form of ZnO NPs and HPPS, did induce the intracellular ROS production, as well as prominently activating NF-${\kappa}B$ and it's dependent genes. Also, compared to ZnO NPs, it effectively increa-sed the uptake by RAW 264.7 cells. In addition, cellular structural alterations were observed in groups treated with ZnO NP HPPS. Conclusions: Neither ZnO NP nor HPPS activated RAW 264.7 cells, which is likely due to a low cellular uptake. The ZnO NP HPPS, however, significantly activated NF-${\kappa}B$ and up-regulated its dependent genes such as TNF-${\alpha}$, IL-1, and MCP-1. ZnO NP HPPS was also more easily taken into the RAW 264.7 cells than either ZnO NP or HPPS.

읽기, 쓰기, 향유 체험을 중심으로 본 청소년의 미디어 리터러시 분석 (An analysis of Adolescents' media literacy: How do they read, write, and enjoy information and communication media?)

  • 신나민;안화실
    • 한국산학기술학회논문지
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    • 제14권8호
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    • pp.3777-3785
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    • 2013
  • 정보통신 미디어는 21세기 정보화 사회 청소년들의 학습과 생활 전반에서 필수적인 요소로 기능한다. 본 연구는 급격히 변모하고 있는 청소년들의 미디어 수용 및 활용 경험을 중층적으로 이해하기 위하여 이들의 미디어(메시지) 읽기, 쓰기, 향유 체험을 분석하였다. 분석에는 구조화된 설문지를 통해 서울, 경기 지역 10개교에서 수집된 12-18세 중고등학생 1,036명의 자료가 사용되었다. 연구결과는 다음과 같이 요약 된다: 1) 청소년들의 일상적인 미디어 이용은 핸드폰 사용, TV 보기, 인터넷 사용, mp3 플레이어듣기, 컴퓨터나 비디오 게임하기, 라디오 듣기, 비디오/DVD 보기 순으로 나타났다; 2) 미디어 활용에서의 성차 분석 결과 남학생은 인터넷 매체에서 그리고 여학생은 핸드폰, SNS 매체에서 더 다양한 활동을 하는 것으로 나타났다; 3) 웹 정보의 비판적 읽기 및 수용에 관해서는 성차는 발견되지 않았고 중고생 간의 학교급별 차이는 유의미했다; 4) 온라인 컨텐츠 제작과 온라인을 통한 자기표현 및 사회적 참여 활동에 대해서는 여학생이 남학생보다, 고등학생이 중학생보다 더 적극적인 것으로 나타났다, 5) 미디어 향유체험의 하루 평균 시간은 주말 게임, 주중 게임, TV 보기, 인터넷 사용 순으로 나타났고, 이 가운데 TV매체에 있어서만 여학생이 남학생보다 그리고 중학생이 고등학생보다 유의미하게 많은 시간을 보내는 것으로 나타났다. 이러한 연구 결과를 바탕으로 올드 미디어와 뉴미디어 간의 컨버전스 현상과 청소년의 성별, 연령별 미디어 활용 행태에 관한 통합적인 논의를 제시 한다.

Antioxidant and hepatoprotective effects of Korean ginseng extract GS-KG9 in a D-galactosamine-induced liver damage animal model

  • Jo, Yun Ho;Lee, Hwan;Oh, Myeong Hwan;Lee, Gyeong Hee;Lee, You Jin;Lee, Ji Sun;Kim, Min Jung;Kim, Won Yong;Kim, Jin Seong;Yoo, Dae Seok;Cho, Sang Won;Cha, Seon Woo;Pyo, Mi Kyung
    • Nutrition Research and Practice
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    • 제14권4호
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    • pp.334-351
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    • 2020
  • BACKGROUND/OBJECTIVES: This study was designed to investigate the improvement effect of white ginseng extract (GS-KG9) on D-galactosamine (Ga1N)-induced oxidative stress and liver injury. SUBJECTS/METHODS: Sixty Sprague-Dawley rats were divided into 6 groups. Rats were orally administrated with GS-KG9 (300, 500, or 700 mg/kg) or silymarin (25 mg/kg) for 2 weeks. The rats of the GS-KG9- and silymarin-treated groups and a control group were then intraperitoneally injected Ga1N at a concentration of 650 mg/kg for 4 days. To investigate the protective effect of GS-KG9 against GalN-induced liver injury, blood liver function indicators, anti-oxidative stress indicators, and histopathological features were analyzed. RESULTS: Serum biochemical analysis indicated that GS-KG9 ameliorated the elevation of aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), and lactate dehydrogenase (LDH) in GalN-treated rats. The hepatoprotective effects of GS-KG9 involved enhancing components of the hepatic antioxidant defense system, including glutathione, glutathione peroxidase (GPx), superoxide dismutase (SOD), and catalase (CAT). In addition, GS-KG9 treatment inhibited reactive oxygen species (ROS) production induced by GalN treatment in hepatocytes and significantly increased the expression levels of nuclear factor erythroid-2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1) proteins, which are antioxidant proteins. In particular, by histological analyses bases on hematoxylin and eosin, Masson's trichrome, α-smooth muscle actin, and transforming growth factor-β1 staining, we determined that the administration of 500 mg/kg GS-KG9 inhibited hepatic inflammation and fibrosis due to the excessive accumulation of collagen. CONCLUSIONS: These findings demonstrate that GS-KG9 improves GalN-induced liver inflammation, necrosis, and fibrosis by attenuating oxidative stress. Therefore, GS-KG9 may be considered a useful candidate in the development of a natural preventive agent against liver injury.

TV 드라마의 내용상의 장르와 영상표현기법의 상관성 (Correlation between Genre and Image Expression Technique of TV Drama)

  • 박덕춘
    • 한국콘텐츠학회논문지
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    • 제9권10호
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    • pp.159-167
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    • 2009
  • 방송에서 TV 드라마의 비중과 영향력이 커지면서, TV 드라마에 대한 많은 연구들이 이루어지기 시작했다. 그러나 이들 연구들은 시청률에 영향을 주는 시청동기, 수용행태 등에 관한 수용자 연구와 드라마 서사구조의 사회적 의미를 분석한 것들이 대부분이었고, TV 드라마의 영상제작기법과 연관된 연구는 시청률과 영상제작기법의 상관성, 시대별 영상제작기법 변천과정, 영화와 TV드라마의 영상제작기법 비교 등과 같은 제한된 수의 연구들이 이루어졌지만, 드라마의 내용과 영상제작기법의 관계를 조명한 연구는 전문한 실정이다. 따라서 본 연구에서는 텔레비전 편성에서 뿐만 아니라 산업적 가치 측면에서도 그 비중이 커지고 있는 텔레비전 드라마의 내용상의 장르와 영상제작기법의 상관성을 분석해보고자 한다. 표본 추출을 위하여 TNS 미디어 코리아에서 제시한 2004년부터 2008년까지의 연간 '시청률 톱 100' 자료를 바탕으로, 이 기간 동안 방송된 역사드라마, 멜로드라마, 홈드라마 중 가장 시청률이 높은 드라마를 각 장르별로 5편씩 총 15편의 드라마에서 8,210개 샷들을 추출하여 이들의 영상제작기법을 비교 분석하였다. 분석결과 역사드라마에서는 홈드라마나 멜로드라마에 비해 클로즈업과 롱샷 그리고 트래킹을 상대적으로 많이 사용하였으며, 샷의 지속시간은 짧은 반면 장면의 지속시간은 긴 것으로 나타났다. 반면 홈 드라마와 멜로드라마에서는 역사드라마에 비해 웨이스트샷이 상대적으로 많이 사용되었으며, 샷의 지속시간은 긴반면, 장면의 지속시간은 상대적으로 짧게 나타났다.

사람의 골수와 제대정맥에서 유래된 중간엽 줄기세포에서 TREK1 통로의 기능적 발현 (Functional expression of TREK1 channel in human bone marrow and human umbilical cord vein-derived mesenchymal stem cells)

  • 박경선;김양미
    • 한국산학기술학회논문지
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    • 제16권3호
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    • pp.1964-1971
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    • 2015
  • 사람의 골수 또는 제대정맥에서 유래된 중간엽 줄기 세포 (hBM-MSC 또는 hUC-MSC)는 임상적 치료 적용에 매우 유용한 세포유형으로 알려져 왔다. 우리는 이러한 세포에서 two-pore 도메인 포타슘 (K2P)채널을 조사하였다. K2P 채널은 다양한 세포유형들에서 안정막 전위를 형성하는데 중요한 역할을 한다. 그들 중 TREK1은 수소, 저산소증, 다불포화 지방산, 항우울제 및 신경전달물질들의 표적이다. 우리는 RT-PCR 분석과 팻취고정기법을 이용하여 hBM-MSCs와 hUC-MSC가 기능적인 TREK1 채널을 발현하는지 조사했다. hBM-MSCs와 hUC-MSCs에서 100 pS 단일 채널 전도도를 가진 포타슘채널이 발견되었고, 그 채널은 세포막 신전 (-5 mmHg ~ -15 mmHg), 아라키도닉산 ($10{\mu}M$), 세포내 산성화 (pH 6.0)에 의해 활성화 되었다. 이러한 전기생리학적 성질은 TREK1과 유사하였다. 우리의 결과는 안정막 전위에 기여하는 TREK1 채널이 hBM-MSC와 hUC-MSC에 기능적으로 존재하고 있음을 제시한다.

저온성균 Sporosarcina psychrophilia로부터 Aspartate Transcarbamylase 유전자의 클로닝 및 염기서열 분석 (Molecular Cloning and Nucleotide Sequence Analysis of pyrB Gene Encoding Aspartate Transcarbamylase from Psychrophilic Sporosarcina psychrophilia)

  • 성혜리;안원근;김사열
    • 한국미생물·생명공학회지
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    • 제30권4호
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    • pp.312-319
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    • 2002
  • 저온성 균인 Sporosarcina psychrophilia의 염색체 DNA를 추출하여 Sau3AI으로 부분 절단하고 pUC19 vector에 ligation 시킨 후, Escherichia coli pyrB mutant 균주에 형질전환하여 uracil이 없는 AB배지에서 생존하는 균주를 선택한 후, 그 plasmid를 분리하여 pSMI과 pSM2라고 명명하였다. 두 plasmid의 염기배열을 결정한 결과 pSM2 insert DNA는 pSMl insert DNA 부분을 포함하는 2,606 nucleotide 단편이었다. 염기서열을 분석하였을 때 이것은 1개의 완전한 open reading frame(ORF)과 2개의 부분 ORFs를 포함하고 있었다. 두 번째 위치한 완전한 ORF는 Bacillus caldolyticus aspartate transcarbamylase(pyrB)와 아미노산 서열 수준에서 59% 상동성을 보였고, 첫 번째와 세 번째 위치한 부분적 ORFs는 각각 Bacillus속의 uracil permease(pyrP)와 dihydoorotase(pyrC)와 높은 상동성을 보였다. 그리고 pyrB와 pyrP사이에 intergenic 부분에는 잠재적인 terminator, antiterminator, anti-antiterminator 구조를 포함하고 있었다. 이러한 결과는 S. psychrophilia pyrimidine 생합성에 관련된 유전자들은 다른 Bacillus속에서 알려진 바와 같이 유전자군을 형성하고 있을 것으로 추정했다. S. psychrophilia pyrB 유전자의 생성물을 과다발현 시키고 정제해서 그 단백질을 SDS-PAGE로 확인한 결과 27 kDa 부근에서 band를 확인할 수 있었으며, 정제한 단백질도 ATCase 효소활성을 지니고 있었다.

Characterization of the Nickel Resistance Gene from Legionella pneumophila: Attenuation of Nickel Resistance by ppk (polyphosphate kinase) Disruption in Escherichia coli

  • Hahm, Dae-Hyun;Yeon, Mi-Jung;Ko, Whae-Min;Lee, Eun-Jooh;Lee, Hye-Jung;Shim, In-Sop;Kim, Hong-Yeoul
    • Journal of Microbiology and Biotechnology
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    • 제12권1호
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    • pp.114-120
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    • 2002
  • A 1,989-bp genomic region encoding nickel resistance genes was isolated from Legionella pneumophila, a pathogen for legionellosis. From a sequencing and computer analysis, the region was found to harbor two structural genes, a nreB-like protein gene (1,149 bp) and a nreA-like protein gene (270 bp), in a row. Both genes exhibited a significant degree of similarity to the corresponding genes from Synechocystis sp. PCC6803 ($54\%$ amino acid sequence identity) and Achromobacter xylosoxidans 31A ($76\%$). The gene was successfully expressed in E. coli MG1655 and conferred a nickel resistance of up to 5 mM in an LB medium and 3 mM in a TMS medium including gluconate as the sole carbon source. E. coli harboring the nickel resistance gene also exhibited a substantial resistance to cobalt, yet no resistance to cadmium or zinc. Since the extracellular concentration of nickel remained constant during the whole period of cultivation, it was confirmed that the nickel resistance was provided by an efflux system like the $Ni^2+$permease (nrsD) of Synechocystis sp. strain PCC6803. Since polyphosphate (poly-P) is known as a global regulator for gene expression as well as a potential virulence factor in E. coli, the nickel resistance of a ppk mutant of E. coli MG 1655 harboring the nickel resistance gene from L. pneumophila was compared with that of its parental strain. The nickel resistance was significantly attenuated by ppk inactivation, which was more pronounced in an LB medium than in a TMS medium.

Cloning, Heterologous Expression, and Characterization of Novel Protease-Resistant ${\alpha}$-Galactosidase from New Sphingomonas Strain

  • Zhou, Junpei;Dong, Yanyan;Li, Junjun;Zhang, Rui;Tang, Xianghua;Mu, Yuelin;Xu, Bo;Wu, Qian;Huang, Zunxi
    • Journal of Microbiology and Biotechnology
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    • 제22권11호
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    • pp.1532-1539
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    • 2012
  • The ${\alpha}$-galactosidase-coding gene agaAJB13 was cloned from Sphingomonas sp. JB13 showing 16S rDNA (1,343 bp) identities of ${\leq}97.2%$ with other identified Sphingomonas strains. agaAJB13 (2,217 bp; 64.9% GC content) encodes a 738-residue polypeptide (AgaAJB13) with a calculated mass of 82.3 kDa. AgaAJB13 showed the highest identity of 61.4% with the putative glycosyl hydrolase family 36 ${\alpha}$-galactosidase from Granulicella mallensis MP5ACTX8 (EFI56085). AgaAJB13 also showed <37% identities with reported protease-resistant or Sphingomonas ${\alpha}$-galactosidases. A sequence analysis revealed different catalytic motifs between reported Sphingomonas ${\alpha}$-galactosidases (KXD and RXXXD) and AgaAJB13 (KWD and SDXXDXXXR). Recombinant AgaAJB13 (rAgaAJB13) was expressed in Escherichia coli BL21 (DE3). The purified rAgaAJB13 was characterized using p-nitrophenyl-${\alpha}$-D-galactopyranoside as the substrate and showed an apparent optimum at pH 5.0 and $60^{\circ}C$ and strong resistance to trypsin and proteinase K digestion. Compared with reported proteaseresistant ${\alpha}$-galactosidases showing thermolability at $50^{\circ}C$ or $60^{\circ}C$ and specific activities of <71 U/mg with or without protease treatments, rAgaAJB13 exhibited a better thermal stability (half-life of >60 min at $60^{\circ}C$) and higher specific activities (225.0-256.5 U/mg). These sequence and enzymatic properties suggest AgaAJB13 is the first identified and characterized Sphingomonas ${\alpha}$-galactosidase, and shows novel protease resistance with a potential value for basic research and industrial applications.

Transcription Analysis of Recombinant Trichoderma reesei HJ-48 to Compare the Molecular Basis for Fermentation of Glucose and Xylose

  • Huang, Jun;Lin, Mei;Liang, Shijie;Qin, Qiurong;Liao, Siming;Lu, Bo;Wang, Qingyan
    • Journal of Microbiology and Biotechnology
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    • 제30권10호
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    • pp.1467-1479
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    • 2020
  • Profiling the transcriptome changes involved in xylose metabolism by the fungus Trichoderma reesei allows for the identification of potential targets for ethanol production processing. In the present study, the transcriptome of T. reesei HJ-48 grown on xylose versus glucose was analyzed using next-generation sequencing technology. During xylose fermentation, numerous genes related to central metabolic pathways, including xylose reductase (XR) and xylitol dehydrogenase (XDH), were expressed at higher levels in T. reesei HJ-48. Notably, growth on xylose did not fully repress the genes encoding enzymes of the tricarboxylic acid and respiratory pathways. In addition, increased expression of several sugar transporters was observed during xylose fermentation. This study provides a valuable dataset for further investigation of xylose fermentation and provides a deeper insight into the various genes involved in this process.