The authors thank previous and current members of the laboratory for development of the protocols. The work was supported by funding from the Canadian Institutes of Health Research (CIHR) [grant # MOP-130527] and from the Natural Sciences and Engineering Research Council of Canada [NSERC-355306-2012]. NG is recipient of a Tier II Canada Research Chair. AR holds a studentship from the training program of the Respiratory Health Research Network from the Fonds de la recherche du Qu&#233;bec-Sant&#233; (FRQS).

<ol>
	<li>Juang, Y. T., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Primary+activation+of+interferon+A+and+interferon+B+gene+transcription+by+interferon+regulatory+factory-3.">Primary activation of interferon A and interferon B gene transcription by interferon regulatory factory-3.</a> Proc Natl Acad Sci U S A. 95 (17), 9837-9842 (1998).</li><li>Lin, R., Hiscott, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+role+for+casein+kinase+II+phosphorylation+in+the+regulation+of+IRF-1+transcriptional+activity.">A role for casein kinase II phosphorylation in the regulation of IRF-1 transcriptional activity.</a> Mol Cell Biochem. 191 (1-2), 169-180 (1999).</li><li>Grandvaux, N., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Transcriptional+profiling+of+interferon+regulatory+factor+3+target+genes:+direct+involvement+in+the+regulation+of+interferon-stimulated+genes.">Transcriptional profiling of interferon regulatory factor 3 target genes: direct involvement in the regulation of interferon-stimulated genes.</a> J Virol. 76 (11), 5532-5539 (2002).</li><li>Thompson, M. R., Kaminski, J. J., Kurt-Jones, E. A., Fitzgerald, K. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Pattern+recognition+receptors+and+the+innate+immune+response+to+viral+infection.">Pattern recognition receptors and the innate immune response to viral infection.</a> Viruses. 3 (6), 920-940 (2011).</li><li>Grandvaux, N., tenOever, B. R., Servant, M. J., Hiscott, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+interferon+antiviral+response:+from+viral+invasion+to+evasion.">The interferon antiviral response: from viral invasion to evasion.</a> Curr Opin Infect Dis. 15 (3), 259-267 (2002).</li><li>Servant, M. J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Identification+of+Distinct+Signaling+Pathways+Leading+to+the+Phosphorylation+of+Interferon+Regulatory+Factor+3.">Identification of Distinct Signaling Pathways Leading to the Phosphorylation of Interferon Regulatory Factor 3.</a> J Biol Chem. 276 (1), 355-363 (2001).</li><li>Qin, B. Y., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Crystal+structure+of+IRF-3+reveals+mechanism+of+autoinhibition+and+virus-induced+phosphoactivation.">Crystal structure of IRF-3 reveals mechanism of autoinhibition and virus-induced phosphoactivation.</a> Nat Struct Biol. 10 (11), 913-921 (2003).</li><li>Takahasi, K., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=X-ray+crystal+structure+of+IRF-3+and+its+functional+implications.">X-ray crystal structure of IRF-3 and its functional implications.</a> Nat Struct Biol. 10 (11), 922-927 (2003).</li><li>Mori, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Identification+of+Ser-386+of+interferon+regulatory+factor+3+as+critical+target+for+inducible+phosphorylation+that+determines+activation.">Identification of Ser-386 of interferon regulatory factor 3 as critical target for inducible phosphorylation that determines activation.</a> J Biol Chem. 279 (11), 9698-9702 (2004).</li><li>Clement, J. F., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Phosphorylation+of+IRF-3+on+Ser+339+generates+a+hyperactive+form+of+IRF-3+through+regulation+of+dimerization+and+CBP+association.">Phosphorylation of IRF-3 on Ser 339 generates a hyperactive form of IRF-3 through regulation of dimerization and CBP association.</a> J Virol. 82 (8), 3984-3996 (2008).</li><li>Saitoh, T., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Negative+regulation+of+interferon-regulatory+factor+3-dependent+innate+antiviral+response+by+the+prolyl+isomerase+Pin1.">Negative regulation of interferon-regulatory factor 3-dependent innate antiviral response by the prolyl isomerase Pin1.</a> Nat Immunol. 7 (6), 598-605 (2006).</li><li>Wathelet, M. G., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Virus+infection+induces+the+assembly+of+coordinately+activated+transcription+factors+on+the+IFN-beta+enhancer+in+vivo.">Virus infection induces the assembly of coordinately activated transcription factors on the IFN-beta enhancer in vivo.</a> Mol Cell. 1 (4), 507-518 (1998).</li><li>Karpova, A. Y., Trost, M., Murray, J. M., Cantley, L. C., Howley, P. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Interferon+regulatory+factor-3+is+an+in+vivo+target+of+DNA-PK.">Interferon regulatory factor-3 is an in vivo target of DNA-PK.</a> Proc Natl Acad Sci U S A. 99 (5), 2818-2823 (2002).</li><li>Zhang, B., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+TAK1-JNK+cascade+is+required+for+IRF3+function+in+the+innate+immune+response.">The TAK1-JNK cascade is required for IRF3 function in the innate immune response.</a> Cell Res. 19 (4), 412-428 (2009).</li><li>Solis, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Involvement+of+TBK1+and+IKKepsilon+in+lipopolysaccharide-induced+activation+of+the+interferon+response+in+primary+human+macrophages.">Involvement of TBK1 and IKKepsilon in lipopolysaccharide-induced activation of the interferon response in primary human macrophages.</a> Eur J Immunol. 37 (2), 528-539 (2007).</li><li>Soucy-Faulkner, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Requirement+of+NOX2+and+reactive+oxygen+species+for+efficient+RIG-I-mediated+antiviral+response+through+regulation+of+MAVS+expression.">Requirement of NOX2 and reactive oxygen species for efficient RIG-I-mediated antiviral response through regulation of MAVS expression.</a> PLoS Pathog. 6 (6), e1000930 (2010).</li><li>Lin, R., Heylbroeck, C., Pitha, P. M., Hiscott, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Virus-dependent+phosphorylation+of+the+IRF-3+transcription+factor+regulates+nuclear+translocation,+transactivation+potential,+and+proteasome-mediated+degradation.">Virus-dependent phosphorylation of the IRF-3 transcription factor regulates nuclear translocation, transactivation potential, and proteasome-mediated degradation.</a> Mol Cell Biol. 18 (5), 2986-2996 (1998).</li><li>Yoneyama, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Direct+triggering+of+the+type+I+interferon+system+by+virus+infection:+activation+of+a+transcription+factor+complex+containing+IRF-3+and+CBP/p300.">Direct triggering of the type I interferon system by virus infection: activation of a transcription factor complex containing IRF-3 and CBP/p300.</a> EMBO J. 17 (4), 1087-1095 (1998).</li><li>Servant, M. J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Identification+of+the+minimal+phosphoacceptor+site+required+for+in+vivo+activation+of+interferon+regulatory+factor+3+in+response+to+virus+and+double-stranded+RNA.">Identification of the minimal phosphoacceptor site required for in vivo activation of interferon regulatory factor 3 in response to virus and double-stranded RNA.</a> J Biol Chem. 278 (11), 9441-9447 (2003).</li><li>Bergstroem, B., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Identification+of+a+novel+in+vivo+virus-targeted+phosphorylation+site+in+interferon+regulatory+factor-3+(IRF3).">Identification of a novel in vivo virus-targeted phosphorylation site in interferon regulatory factor-3 (IRF3).</a> J Biol Chem. 285 (32), 24904-24914 (2010).</li><li>Takahasi, K., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Ser386+phosphorylation+of+transcription+factor+IRF-3+induces+dimerization+and+association+with+CBP/p300+without+overall+conformational+change.">Ser386 phosphorylation of transcription factor IRF-3 induces dimerization and association with CBP/p300 without overall conformational change.</a> Genes Cells. 15 (8), 901-910 (2010).</li><li>Noyce, R. S., Collins, S. E., Mossman, K. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Differential+modification+of+interferon+regulatory+factor+3+following+virus+particle+entry.">Differential modification of interferon regulatory factor 3 following virus particle entry.</a> J Virol. 83 (9), 4013-4022 (2009).</li><li>McCoy, C. E., Carpenter, S., Palsson-McDermott, E. M., Gearing, L. J., O'Neill, L. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Glucocorticoids+inhibit+IRF3+phosphorylation+in+response+to+Toll-like+receptor-3+and+-4+by+targeting+TBK1+activation.">Glucocorticoids inhibit IRF3 phosphorylation in response to Toll-like receptor-3 and -4 by targeting TBK1 activation.</a> J Biol Chem. 283 (21), 14277-14285 (2008).</li><li>Oliere, S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=HTLV-1+evades+type+I+interferon+antiviral+signaling+by+inducing+the+suppressor+of+cytokine+signaling+1+(SOCS1).">HTLV-1 evades type I interferon antiviral signaling by inducing the suppressor of cytokine signaling 1 (SOCS1).</a> PLoS Pathog. 6 (11), e1001177 (2010).</li><li>Kato, H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cell+type-specific+involvement+of+RIG-I+in+antiviral+response.">Cell type-specific involvement of RIG-I in antiviral response.</a> Immunity. 23 (1), 19-28 (2005).</li><li>Bradford, M. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+rapid+and+sensitive+method+for+the+quantitation+of+microgram+quantities+of+protein+utilizing+the+principle+of+protein-dye+binding.">A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding.</a> Anal Biochem. 72, 248-254 (1976).</li><li>Iwamura, T., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Induction+of+IRF-3/-7+kinase+and+NF-kappaB+in+response+to+double-stranded+RNA+and+virus+infection:+common+and+unique+pathways.">Induction of IRF-3/-7 kinase and NF-kappaB in response to double-stranded RNA and virus infection: common and unique pathways.</a> Genes Cells. 6 (4), 375-388 (2001).</li><li>tenOever, B. R., Servant, M. J., Grandvaux, N., Lin, R., Hiscott, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Recognition+of+the+measles+virus+nucleocapsid+as+a+mechanism+of+IRF-3+activation.">Recognition of the measles virus nucleocapsid as a mechanism of IRF-3 activation.</a> J Virol. 76 (8), 3659-3669 (2002).</li><li>Bibeau-Poirier, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Involvement+of+the+I{kappa}B+Kinase+(IKK)-Related+Kinases+Tank-Binding+Kinase+1/IKKi+and+Cullin-Based+Ubiquitin+Ligases+in+IFN+Regulatory+Factor-3+Degradation.">Involvement of the I{kappa}B Kinase (IKK)-Related Kinases Tank-Binding Kinase 1/IKKi and Cullin-Based Ubiquitin Ligases in IFN Regulatory Factor-3 Degradation.</a> J Immunol. 177 (8), 5059-5067 (2006).</li><li>Grandvaux, N., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Sustained+Activation+of+Interferon+Regulatory+Factor+3+during+Infection+by+Paramyxoviruses+Requires+MDA5.">Sustained Activation of Interferon Regulatory Factor 3 during Infection by Paramyxoviruses Requires MDA5.</a> J Innate Immun. 6 (5), 650-662 (2014).</li></ol>

The authors declare that they have no competing financial interests.

私たちはここで説明するプロトコルは、IRF3の二量体/単量体とphosphoforms I〜IVを区別するためのいくつかのリン酸化抗体の使用に結合された高解像度のSDS-PAGEおよびネイティブPAGEの組み合わせで構成されます。これらIRF3の種の適切な検出が完全に特定の設定でIRF3の活性化を特徴づけるために不可欠です。例えば、活性化マクロファージのLPS刺激は、低リン酸化（II型）を示すが、（III型および...

<html>遍在的および構成的に発現する転写因子、インターフェロン（IFN）調節因子3（IRF3）は、主に、IFNβの誘導により、病原体に対する防御の最初の行のために重要であるが、また、ケモカイン（CCモチーフ）の誘導リガンド5（CCL5を通じて）およびIFNにより誘導されるタンパク質を含むいくつかの抗ウイルスタンパク質テトラトリコペプチドとは、IFIT1 / 2/3 1〜3を繰り返します。またはリポポリサッカライド（LPS）4：IRF3の活性化は、多数のウイルスの感染、またはポリイノシン-ポリシチジル酸（CポリI）への曝露後に報告されています。重要なことは、ほとんど研究されたウイルスは、IRF3媒介応答を回避し、それによって宿主自然免疫防御5をエスケープする機構を進化させてきました。したがって、IRF3の活性化を監視する先天的抗ウイルス宿主防御の分子機構を理解するだけでなく、この応答に対抗するためにウイルスによって使用される戦略を同定するために非常に重要です。 ENT &quot;&gt;多くの公表された報告は、しかしながら、低解像度のドデシル硫酸ナトリウムポリアクリルアミドゲル電気泳動に結合IRF3標的遺伝子誘導のモニタリング（IFNB1およびIFIT1）によって実行IRF3の活性化および/ ​​またはルシフェラーゼレポーター遺伝子アッセイの限定された分析を提供します（SDS- PAGE）IRF3の解析が、多数の生化学的研究は、様々なIRF3の変異体及びIRF3結晶構造6-11の解明の挙動の解析がでリン酸化により逐次翻訳後修飾の複雑なセットを施すことがIRF3を確立するために貢献しています複数のサイト。IRF3の活性化に関与するリン酸化のセットは、細胞型に刺激に依存して、最も可能性が高いと思われる。非感染細胞では、IRF3は1で、Thr135およびSer173を含むphosphoresiduesを含む非リン酸化および低リン酸化種として共存-198 AAのN末端 ​​領域6,12-14。この低リン酸化Fの蓄積IRF3のORMは、ストレス誘導物質、成長因子およびDNA損傷剤6によって誘導されます。細胞型に依存した方法で15〜17℃またはLPS：トランス活性化ドメインを含むIRF3のC末端領域におけるセリン/スレオニン残基のリン酸化は、ウイルス、ポリIによる活性化、次のトリガされます。 IRF3のC末端のリン酸化は、それぞれが二量体化、核蓄積、CREBとの会合を通じてIRF3の活性化に寄与することを二つの主クラスタ、Ser385 / Ser386およびSer396 / Ser398 / Ser402 / Thr404 / Ser405、で編成一切7未満の異なるホスホサイトを伴いません-結合タンパク質（CBP）/ P300の活性化補助因子、敏感な応答要素（ISRE）コンセンサス配列と標的遺伝子9,10,17-19のトランスをIFNするDNA結合。 Thr390のリン酸化はまた、ウイルス誘導IRF3の活性化20に寄与していると考えられます。質量分析は、Ser386、Thr390、Ser396およびSer402残基が直接phosphorylatであることを実証したIRF3の分析κBキナーゼεの阻害剤（IKKε）によりED / TANK結合キナーゼ1（TBK1）は9,10キナーゼ。 C末端残基でのリン酸化はまた、ポリユビキチン化およびプロテアソーム媒介分解10を介してIRF3活性化の終了のために必要とされます。このプロセスは、プロピルイソメラーゼPin1が10,11の募集のために必要であるSer339でのリン酸化に依存します。少なくともリン酸化Ser339 / 396分の386残基を含むIRF3種は、高リン酸化形態と考えられています。各サイトの正確な配列および機能が議論10,21の問題のまま。それは活性化したIRF3が均一な状態を表すものではありませんが、個別のリン酸化または二量体化特性を示す、異なる活性種が10,22に存在することが明らかです。 特定の病原体に応答して、IRF3の活性化の完全な理解を提供するために、それをCHする必要がありますaracterize活性種の誘導されます。 IRF3標的遺伝子、IFNB1およびIFIT1の誘導は、IRF3の活性化のための信頼性の高い読み出しを提供するように証明されています。しかし、これらの遺伝子の発現をモニターすることは、IRF3の異なる活性化状態を区別しません。特定の設定でIRF3活性化状態の包括的な分析は、そのリン酸化および二量体化状態10の詳細な特性に依存しています。非リン酸化（形態I）は、（フォームII）及び過低リン酸化（形態IIIおよびIV）IRF3形態6,18,23が正常に高解像度のSDS-PAGE分析を小さく移動度によって解決することができます。単量体および二量体IRF3種を効率的にネイティブPAGE分析によって同定することができます。異なるIRF3のホスホ部位に対して向けリン酸化特異的抗体と組み合わせて使用​​した場合、これらのアプローチは、大幅に改善されます。 標準的なプロトコルは、貧しい人々の解像度を可能にします明確なIRF3リン酸化型の効率的な分離を許可しないタンパク質です。ここでは、詳細に合計とリン酸化抗体を用いたイムノブロットとの組み合わせでネイティブ-PAGEに結合されたSDS-PAGEを使用して、個別のウイルス活性化IRF3種の誘導を監視するための最高の解像度を達成するための手順が記載されている。アクティブに異なるとの間で生体差別IRF3の形態は、SDS-PAGE上で観察され、それらの移動度シフトに基づいて行われます。また、IRF3モノマーおよびダイマーは、非変性電気泳動によって区別す​​ることができます。イムノブロットによるこれら二つの相補的な技術の組み合わせは、IRF3のリン酸化媒介活性化の完全な分析のためにすべての必要な情報を取得するための手頃な価格に敏感なアプローチであることが分かります。

<table border="0" cellpadding="0" cellspacing="0" width="1098">
	<tbody>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">F12/Ham</td>
			<td style="width:191px;">Life Technologies</td>
			<td style="width:119px;">11765-054</td>
			<td style="width:429px;">Warm in a 37&#176;C bath before use.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Fetal bovine serum</td>
			<td style="width:191px;">Life Technologies</td>
			<td style="width:119px;">12483-020</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">L-glutamine</td>
			<td style="width:191px;">Life Technologies</td>
			<td style="width:119px;">25030-081</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">D-PBS</td>
			<td style="width:191px;">Life Technologies</td>
			<td style="width:119px;">14190-144</td>
			<td>For cell culture.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Trypsin/EDTA 0.25 %</td>
			<td style="width:191px;">Life Technologies</td>
			<td style="width:119px;">25200-072</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Sendai virus Cantell Strain</td>
			<td style="width:191px;">Charles River Laboratories</td>
			<td style="width:119px;">600503</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Hepes</td>
			<td style="width:191px;">Bioshop</td>
			<td style="width:119px;">HEP001</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Sodium chloride (NaCl)</td>
			<td>Bioshop</td>
			<td>SOD001.5</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">EDTA</td>
			<td style="width:191px;">Bioshop</td>
			<td style="width:119px;">EDT001</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Glycerol</td>
			<td style="width:191px;">Bioshop</td>
			<td style="width:119px;">GLY001.1</td>
			<td style="width:429px;">Cut the extreminity of the tip and pipet slowly as it is very thick.</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:359px;">IGEPAL CA-630</td>
			<td style="width:191px;">Sigma-Aldrich</td>
			<td style="width:119px;">I7771</td>
			<td style="width:429px;">Registred trademark corresponding to Octylphenoxy poly(ethyleneoxy)ethanol (Nonidet P-40) detergent</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Leupeptin</td>
			<td style="width:191px;">Bioshop</td>
			<td style="width:119px;">LEU001</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Aprotinin</td>
			<td>Bioshop</td>
			<td>APR600.25&#160;</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Sodium fluoride</td>
			<td>Sigma-Aldrich</td>
			<td>201154</td>
			<td></td>
		</tr>
		<tr height="150">
			<td height="150" style="height:150px;">Sodium orthovanadate</td>
			<td>MP Biomedicals</td>
			<td>159664</td>
			<td style="width:429px;">Activation of sodium orthovanadate 0.2M : 1) Ajust the pH to 10.0 using either 1 N NaOH or 1 N HCl. The starting pH of the sodium orthotovanadate solution may vary with lots of chemical. 2) The solution is yellow at pH 10.0. 3) Boil until colorless. 4) Cool to RT. 5) Reajust the pH to 10.0 and repat steps 3-4 until the solution remains colorless and stabilizes at 10.0. Store the activated sodium orthovanadate aliquots at -20&#176;C.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">p-nitrophenyl phosphate disodium salt hexahydrate</td>
			<td style="width:191px;">Sigma-Aldrich</td>
			<td style="width:119px;">P1585</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Beta-Glycerophosphate</td>
			<td>Sigma-Aldrich</td>
			<td>G6376&#160;</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Bio-Rad Protein Assay Reagent&#160;</td>
			<td>Bio-Rad</td>
			<td>500-0006&#160;</td>
			<td>Cytotoxic</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Acrylamide/Bis-Acrylamide (37.5 : 1) 40 %</td>
			<td>Bioshop</td>
			<td>ACR005&#160;</td>
			<td>Cytotoxic</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Tris-Base</td>
			<td style="width:191px;">Bioshop</td>
			<td>DEO701</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Hydrochloric acid (HCl)</td>
			<td>LabChem</td>
			<td>LC15320-4&#160;</td>
			<td>Work under fume hood. Toxic and irritant.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Sodium dodecyl sulfate (SDS)</td>
			<td>Bioshop</td>
			<td>SDS001.1&#160;</td>
			<td>Irritant.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Amonium persulfate</td>
			<td>Sigma-Aldrich</td>
			<td>A3678</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">TEMED</td>
			<td>Invitrogen</td>
			<td>15524-010</td>
			<td>Toxic and irritant.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Bromophenol blue</td>
			<td style="width:191px;">Fisher Scientific</td>
			<td style="width:119px;">B392-5</td>
			<td></td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;">Beta-mercaptoethanol</td>
			<td>Sigma-Aldrich</td>
			<td>M6250</td>
			<td style="width:429px;">Work under fume hood. Toxic to the nervous system, mucous membranes. May be toxic to upper respiratory tract, eyes, central nervous system.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Glycine</td>
			<td>Bioshop</td>
			<td>GLN001.5</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Sodium deoxycholate</td>
			<td>Sigma-Aldrich</td>
			<td>D6750</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Sodium hydroxide (NaOH)</td>
			<td>Bioshop</td>
			<td>SHY700&#160;</td>
			<td>Irritant.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Nitrocellulose membrane (0.45mm)</td>
			<td style="width:191px;">Bio-Rad</td>
			<td style="width:119px;">162-0115</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Acetic acid glacial</td>
			<td>Bioshop</td>
			<td>ACE222.4</td>
			<td>Work under fume hood. Toxic, irritant and flammable.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Red ponceau</td>
			<td>Sigma-Aldrich</td>
			<td>P3504&#160;&#160;</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Potassium chloride (KCl)</td>
			<td>Sigma-Aldrich</td>
			<td>P3911&#160;</td>
			<td>For PBS composition for immunoblot.</td>
		</tr>
		<tr height="25">
			<td height="25" style="height:25px;width:359px;">Na2HPO4</td>
			<td>Bioshop</td>
			<td>SPD307.5</td>
			<td>For PBS composition for immunoblot.</td>
		</tr>
		<tr height="25">
			<td height="25" style="height:25px;width:359px;">KH2PO4</td>
			<td>Sigma-Aldrich</td>
			<td>P0662&#160;</td>
			<td>For PBS composition for immunoblot.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Bovine serum albumin</td>
			<td style="width:191px;">Sigma-Aldrich</td>
			<td style="width:119px;">A7906</td>
			<td>For PBS-T-BSA composition for immunoblot.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Non-fat dry milk</td>
			<td style="width:191px;">Carnation</td>
			<td style="width:119px;"></td>
			<td></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:23px;">Poly sorbate 20 (Tween)</td>
			<td>MP Biomedicals</td>
			<td>103168</td>
			<td style="width:429px;">Cut the extreminity of the tip and pipet slowly as it is very thick.</td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:359px;">Anti-IRF-3-P-Ser386</td>
			<td style="width:191px;">IBL-America</td>
			<td style="width:119px;">18783</td>
			<td>Store aliquoted at -20oC. Avoid freeze/thaw.</td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:359px;">Anti-IRF-3-P-Ser396</td>
			<td style="width:191px;">Home made19</td>
			<td style="width:119px;"></td>
			<td>Store aliquoted at -80oC. Avoid freeze/thaw.</td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:359px;">Phospho-IRF-3 (Ser396) (4D4G)</td>
			<td style="width:191px;">Cell Signaling Technology</td>
			<td style="width:119px;">4947s</td>
			<td>Store at -20oC.</td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:359px;">Anti-IRF-3-P-Ser398</td>
			<td style="width:191px;">Home made15</td>
			<td style="width:119px;"></td>
			<td>Store aliquoted at -80oC. Avoid freeze/thaw.</td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:359px;">Anti-IRF-3-full length</td>
			<td style="width:191px;">Actif motif</td>
			<td style="width:119px;">39033</td>
			<td>Store aliquoted at -80oC. Avoid freeze/thaw.</td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:359px;">Anti-IRF3-NES</td>
			<td style="width:191px;">IBL-America</td>
			<td style="width:119px;">18781</td>
			<td>Store aliquoted at -20oC.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Western Lightning Chemiluminescence Reagent Plus</td>
			<td>Perkin-Elmer Life Sciences</td>
			<td>NEL104001EA</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">LAS4000mini CCD camera apparatus</td>
			<td style="width:191px;">GE healthcare</td>
			<td style="width:119px;"></td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:359px;">SDS-PAGE Molecular Weight Standards, Broad Range</td>
			<td style="width:191px;">Bio-Rad</td>
			<td style="width:119px;">161-0317</td>
			<td>Store aliquoted at -20oC.</td>
		</tr>
	</tbody>
</table>

a high resolution method to monitor phosphorylation-dependent activation of irf3

The IRF3 transcription factor is critical for the first line of defense against pathogens mainly through interferon &#946; and antiviral gene expression. A detailed analysis of IRF3 activation is essential to understand how pathogens induce or evade the innate antiviral response. Distinct activated forms of IRF3 can be distinguished based on their phosphorylation and monomer vs dimer status. In vivo discrimination between the different activated species of IRF3 can be achieved through the separation of IRF3 phosphorylated forms based on their mobility shifts on SDS-PAGE. Additionally, the levels of IRF3 monomer and dimer can be monitored using non-denaturing electrophoresis. Here, we detail a procedure to reach the highest resolution to gain the most information regarding IRF3 activation status. This is achieved through the combination of a high resolution SDS-PAGE and a native-PAGE coupled to immunoblots using multiple total and phosphospecific antibodies. This experimental strategy constitutes an affordable and sensitive approach to acquire all the necessary information for a complete analysis of the phosphorylation-mediated activation of IRF3.

図2は、高解像度のSDS-PAGEによるWCEの決議後にIRF3総抗体およびSer396およびSer398に対するIRF3、リン酸化抗体を用いて検出されたIRF3の代表的なイムノブロット像を示します。刺激されていないA549細胞では、IRF3は50で二つのバンドと非リン酸化（I型）に対応し、SDS-PAGE上の53kDaの低リン酸化及び（II型）IRF3の種として検出されます。 3のためのSeVにA549細胞の曝?...

Watch this Scientific Journal Video about A High Resolution Method to Monitor Phosphorylation-dependent Activation of IRF3 at JoVE.com

A High Resolution Method to Monitor Phosphorylation-dependent Activation of IRF3

Here we describe a procedure allowing a detailed analysis of the phosphorylation-dependent activation of the IRF3 transcription factor. This is achieved through the combination of a high resolution SDS-PAGE and a native-PAGE coupled to immunoblots using multiple phosphospecific antibodies.

IRF3のリン酸化依存性活性化を監視するために、高解像度の方法

The IRF3 transcription factor is critical for the first line of defense against pathogens mainly through interferon &#946; and antiviral gene expression. ...

a-high-resolution-method-to-monitor-phosphorylation-dependent

Research

JoVE Journal

Biology

11.8K ビュー.  Université de Montréal. Here we describe a procedure allowing a detailed analysis of the phosphorylation-dependent activation of the IRF3 transcription factor. This is achieved through the combination of a high resolution SDS-PAGE and a native-PAGE coupled to immunoblots using multiple phosphospecific antibodies.

ビデオ: A High Resolution Method to Monitor Phosphorylation-dependent Activation of IRF3

High-resolution Measurement of Odor-Driven Behavior in Drosophila Larvae

Olfactory responses in Drosophila larvae have been traditionally studied in Petri dishes comprising a single peripheral odor source. In this behavioral paradigm, the experimenter usually assumes that the rapid diffusion of odorant molecules from the source leads to the creation of a stable gradient in the dish. To establish a quantitative correlation between sensory inputs and behavioral responses, it is necessary to achieve a more thorough characterization of the odorant stimulus conditions. In this video article, we describe a new method allowing the construction of odorant gradients with stable and controllable geometries. We briefly illustrate how these gradients can be used to screen for olfactory defects (full and partial anosmia) and to study more subtle features of chemotaxis behavior.

In this video article, we describe a new method allowing the construction of odorant gradients with stable and controllable geometries. We briefly illustrate how these gradients can be used to screen for olfactory defects (full and partial anosmia) and to study more subtle features of chemotaxis behavior.

ショウジョウバエの幼虫の匂い駆動型の動作の高分解能測定

Olfactory responses in Drosophila larvae have been traditionally studied in Petri dishes comprising a single peripheral odor source. In this behavioral ...

生物学

High-Resolution Video Tracking of Locomotion in Adult Drosophila Melanogaster

Flies provide an important model for studying complex behavior due to the plethora of genetic tools available to researchers in this field. Studying locomotor behavior in Drosophila melanogaster relies on the ability to be able to quantify changes in motion during or in response to a given task. For this reason, a high-resolution video tracking system, such as the one we describe in this paper, is a valuable tool for measuring locomotion in real-time. Our protocol involves the use of an initial air pulse to break the flies momentum, followed by a thirty second filming period in a square chamber. A tracking program is then used to calculate the instantaneous speed of each fly within the chamber in 10 msec increments. Analysis software then compiles this data, and outputs a variety of parameters such as average speed, max speed, time spent in motion, acceleration, etc. This protocol will discuss proper feeding and management of flies for behavioral tasks, handling flies without anesthetization or immobilization, setting up a controlled environment, and running the assay from start to finish.

The study of complex locomotor behavior in Drosophila melanogaster is dependent upon the ability to quantify changes in a given fly's movement. This article demonstrates how to do this using a high-resolution tracking system.

アダルトキイロショウジョウバエのロコモーションの高解像度のビデオトラッキング

Flies provide an important model for studying complex behavior due to the plethora of genetic tools available to researchers in this field.  Studying ...

Zebrafish Whole Mount High-Resolution Double Fluorescent In Situ Hybridization

Whole mount in situ hybridization is one of the most widely used techniques in developmental biology. Here, we present a high-resolution double fluorescent in situ hybridization protocol for analyzing the precise expression pattern of a single gene and for determining the overlap of the expression domains of two genes. The protocol is a modified version of the standard in situ hybridization using alkaline phosphatase and substrates such as NBT/BCIP and Fast Red 1,2. This protocol utilizes standard digoxygenin and fluorescein labeled probes along with tyramide signal amplification (TSA) 3. The commercially available TSA kits allow flexible experimental design as fluorescence emission from green to far-red can be used in combination with various nuclear stains, such as propidium iodide, or fluorescence immunohistochemistry for proteins. TSA produces a reactive fluorescent substrate that quickly covalently binds to moieties, typically tyrosine residues, in the immediate vicinity of the labeled antisense riboprobe. The resulting staining patterns are high resolution in that subcellular localization of the mRNA can be observed using laser scanning confocal microscopy 3,4. One can observe nascent transcripts at the chromosomal loci, distinguish nuclear and cytoplasmic staining and visualize other patterns such as cortical localization of mRNA. Studies in Drosophila indicate that roughly 70% of mRNAs exhibit specific patterns of subcellular localization that frequently correlate with the function of the encoded protein 5. When combined with computer-aided reconstruction of 3D confocal datasets, our protocol allows the detailed analysis of mRNA distribution with sub-cellular resolution in whole vertebrate embryos.

Zebrafish Whole Mount High-Resolution Double Fluorescent In Situ Hybridization

Whole mount in situ hybridization is one of the most widely used techniques in developmental biology. Here, we present a high-resolution double fluorescent in situ hybridization protocol for analyzing the precise expression pattern of a single gene and for determining the overlap of the expression domains of two genes. We include a propidium iodide nuclear counter-stain to highlight tissue organization.

ゼブラフィッシュの全マウント高分解能二重蛍光上皮内ハイブリダイゼーション

Whole mount in situ hybridization is one of the most widely used techniques in developmental biology.  Here, we present a high-resolution double ...

Quantification of dsDNA using the Hitachi F-7000 Fluorescence Spectrophotometer and PicoGreen Dye

Quantification of DNA, especially in small concentrations, is an important task with a wide range of biological applications including standard molecular biology assays such as synthesis and purification of DNA, diagnostic applications such as quantification of DNA amplification products, and detection of DNA molecules in drug preparations. During this video we will demonstrate the capability of the Hitachi F-7000 Fluorescence Spectrophotometer equipped with a Micro Plate Reader accessory to perform dsDNA quantification using Molecular Probes Quant-it PicoGreen dye reagent kit.
The F-7000 Fluorescence Spectrophotometer offers high sensitivity and high speed measurements. It is a highly flexible system capable of measuring fluorescence, luminescence, and phosphorescence. Several measuring modes are available, including wavelength scan, time scan, photometry and 3-D scan measurement. The spectrophotometer has sensitivity in the range of 50 picomoles of fluorescein when using a 300 &#956;L sample volume in the microplate, and is capable of measuring scan speeds of 60,000 nm/minute. It also has a wide dynamic range of up to 5 orders of magnitude which allows for the use of calibration curves over a wide range of concentrations. The optical system uses all reflective optics for maximum energy and sensitivity. The standard wavelength range is 200 to 750 nm, and can be extended to 900 nm when using one of the optional near infrared photomultipliers. The system allows optional temperature control for the plate reader from 5 to 60 degrees Celsius using an optional external temperature controlled liquid circulator. The microplate reader allows for the use of 96 well microplates, and the measuring speed for 96 wells is less than 60 seconds when using the kinetics mode.
Software controls for the F-7000 and Microplate Reader are also highly flexible. Samples may be set in either column or row formats, and any combination of wells may be chosen for sample measurements. This allows for optimal utilization of the microplate. Additionally, the software allows importing micro plate sample configurations created in Excel and saved in comma separated values, or "csv" format. Microplate measuring configurations can be saved and recalled by the software for convenience and increased productivity. Data results can be output to a standard report, to Excel, or to an optional Report Generator Program.

Demonstration of quantification of dsDNA using Molecular Probes PicoGreen dye and Hitachi F-7000 Fluorescence Spectrophotometer equipped with a microplate reader accessory.

日立F - 7000蛍光分光光度計とPicoGreen色素を使用してdsDNAの定量化

Quantification of DNA, especially in small concentrations, is an important task with a wide range of biological applications including standard molecular ...

Absolute Quantum Yield Measurement of Powder Samples

Measurement of fluorescence quantum yield has become an important tool in the search for new solutions in the development, evaluation, quality control and research of illumination, AV equipment, organic EL material, films, filters and fluorescent probes for bio-industry.
Quantum yield is calculated as the ratio of the number of photons absorbed, to the number of photons emitted by a material. The higher the quantum yield, the better the efficiency of the fluorescent material.
For the measurements featured in this video, we will use the Hitachi F-7000 fluorescence spectrophotometer equipped with the Quantum Yield measuring accessory and Report Generator program. All the information provided applies to this system. 
Measurement of quantum yield in powder samples is performed following these steps:
<ol>
 <li>Generation of instrument correction factors for the excitation and emission monochromators. This is an important requirement for the correct measurement of quantum yield. It has been performed in advance for the full measurement range of the instrument and will not be shown in this video due to time limitations.</li>
 <li>Measurement of integrating sphere correction factors. The purpose of this step is to take into consideration reflectivity characteristics of the integrating sphere used for the measurements.</li>
 <li>Reference and Sample measurement using direct excitation and indirect excitation.</li>
 <li>Quantum Yield calculation using Direct and Indirect excitation. Direct excitation is when the sample is facing directly the excitation beam, which would be the normal measurement setup. However, because we use an integrating sphere, a portion of the emitted photons resulting from the sample fluorescence are reflected by the integrating sphere and will re-excite the sample, so we need to take into consideration indirect excitation. This is accomplished by measuring the sample placed in the port facing the emission monochromator, calculating indirect quantum yield and correcting the direct quantum yield calculation.</li>
 <li>Corrected quantum yield calculation.</li>
 <li>Chromaticity coordinates calculation using Report Generator program.</li>
</ol>
The Hitachi F-7000 Quantum Yield Measurement System offer advantages for this
application, as follows:
<ul>
 <li>High sensitivity (S/N ratio 800 or better RMS). Signal is the Raman band of water measured under the following conditions: Ex wavelength 350 nm, band pass Ex and Em 5 nm, response 2 sec), noise is measured at the maximum of the Raman peak. High sensitivity allows measurement of samples even with low quantum yield. Using this system we have measured quantum yields as low as 0.1 for a sample of salicylic acid and as high as 0.8 for a sample of magnesium tungstate.</li>
 <li>Highly accurate measurement with a dynamic range of 6 orders of magnitude allows for measurements of both sharp scattering peaks with high intensity, as well as broad fluorescence peaks of low intensity under the same conditions. </li>
 <li>High measuring throughput and reduced light exposure to the sample, due to a high scanning speed of up to 60,000 nm/minute and automatic shutter function. </li>
 <li>Measurement of quantum yield over a wide wavelength range from 240 to 800 nm.</li>
 <li>Accurate quantum yield measurements are the result of collecting instrument spectral response and integrating sphere correction factors before measuring the sample.</li>
 <li>Large selection of calculated parameters provided by dedicated and easy to use software.
</li>
</ul> 
During this video we will measure sodium salicylate in powder form which is known to have a quantum yield value of 0.4 to 0.5.

In this video we will demonstrate measuring and calculating absolute quantum yield and chromaticity coordinates directly in powder samples using the Hitachi F-7000 Quantum Yield Measuring System.

粉末試料の絶対量子収率測定

Measurement of fluorescence quantum yield has become an important tool in the search for new solutions in the development, evaluation, quality control and ...

Using High Resolution Computed Tomography to Visualize the Three Dimensional Structure and Function of Plant Vasculature

High resolution x-ray computed tomography (HRCT) is a non-destructive diagnostic imaging technique with sub-micron resolution capability that is now being used to evaluate the structure and function of plant xylem network in three dimensions (3D) (e.g. Brodersen et al. 2010; 2011; 2012a,b). HRCT imaging is based on the same principles as medical CT systems, but a high intensity synchrotron x-ray source results in higher spatial resolution and decreased image acquisition time. Here, we demonstrate in detail how synchrotron-based HRCT (performed at the Advanced Light Source-LBNL Berkeley, CA, USA) in combination with Avizo software (VSG Inc., Burlington, MA, USA) is being used to explore plant xylem in excised tissue and living plants. This new imaging tool allows users to move beyond traditional static, 2D light or electron micrographs and study samples using virtual serial sections in any plane. An infinite number of slices in any orientation can be made on the same sample, a feature that is physically impossible using traditional microscopy methods.
Results demonstrate that HRCT can be applied to both herbaceous and woody plant species, and a range of plant organs (i.e. leaves, petioles, stems, trunks, roots). Figures presented here help demonstrate both a range of representative plant vascular anatomy and the type of detail extracted from HRCT datasets, including scans for coast redwood (Sequoia sempervirens), walnut (Juglans spp.), oak (Quercus spp.), and maple (Acer spp.) tree saplings to sunflowers (Helianthus annuus), grapevines (Vitis spp.), and ferns (Pteridium aquilinum and Woodwardia fimbriata). Excised and dried samples from woody species are easiest to scan and typically yield the best images. However, recent improvements (i.e. more rapid scans and sample stabilization) have made it possible to use this visualization technique on green tissues (e.g. petioles) and in living plants. On occasion some shrinkage of hydrated green plant tissues will cause images to blur and methods to avoid these issues are described. These recent advances with HRCT provide promising new insights into plant vascular function.

High resolution x-ray computed tomography (HRCT) is a non-destructive diagnostic imaging technique that can be used to study the structure and function of plant vasculature in 3D. We demonstrate how HRCT facilitates exploration of xylem networks across a wide range of plant tissues and species.

プラントの脈管構造の三次元構造と機能を可視化するために、高分解能CTを用いた

High resolution x-ray computed tomography (HRCT) is a non-destructive diagnostic imaging technique with sub-micron resolution capability that is now being ...

Ex vivo Method for High Resolution Imaging of Cilia Motility in Rodent Airway Epithelia

An ex vivo technique for imaging mouse airway epithelia for quantitative analysis of motile cilia function important for insight into mucociliary clearance function has been established. Freshly harvested mouse trachea is cut longitudinally through the trachealis muscle and mounted in a shallow walled chamber on a glass-bottomed dish. The trachea sample is positioned along its long axis to take advantage of the trachealis muscle to curl longitudinally. This allows imaging of ciliary motion in the profile view along the entire tracheal length. Videos at 200 frames/sec are obtained using differential interference contrast microscopy and a high speed digital camera to allow quantitative analysis of cilia beat frequency and ciliary waveform. With the addition of fluorescent beads during imaging, cilia generated fluid flow also can be determined. The protocol time spans approximately 30 min, with 5 min for chamber preparation, 5-10 min for sample mounting, and 10-15 min for videomicroscopy.

Ex vivo Method for High Resolution Imaging of Cilia Motility in Rodent Airway Epithelia

An easy and reliable technique for visualizing and quantifying airway cilia motility and cilia generated flow using mouse trachea is described. This technique can be modified to determine how a wide range of factors influence cilia motility, including pharmacological agents, genetic factors, environmental exposures, and/or mechanical factors such as mucus load.

齧歯気道上皮における繊毛の運動性の高分解能イメージングのためのex vivo法

An ex vivo technique for imaging mouse airway epithelia for quantitative  analysis of motile cilia function important for insight into mucociliary  ...

High Resolution Quantification of Crystalline Cellulose Accumulation in Arabidopsis Roots to Monitor Tissue-specific Cell Wall Modifications

Plant cells are surrounded by a cell wall, the composition of which determines their final size and shape. The cell wall is composed of a complex matrix containing polysaccharides that include cellulose microfibrils that form both crystalline structures and cellulose chains of amorphous organization. The orientation of the cellulose fibers and their concentrations dictate the mechanical properties of the cell. Several methods are used to determine the levels of crystalline cellulose, each bringing both advantages and limitations. Some can distinguish the proportion of crystalline regions within the total cellulose. However, they are limited to whole-organ analyses that are deficient in spatiotemporal information. Others relying on live imaging, are limited by the use of imprecise dyes. Here, we report a sensitive polarized light-based system for specific quantification of relative light retardance, representing crystalline cellulose accumulation in cross sections of Arabidopsis thaliana roots. In this method, the cellular resolution and anatomical data are maintained, enabling direct comparisons between the different tissues composing the growing root. This approach opens a new analytical dimension, shedding light on the link between cell wall composition, cellular behavior and whole-organ growth.

High Resolution Quantification of Crystalline Cellulose Accumulation in Arabidopsis Roots to Monitor Tissue-specific Cell Wall Modifications

Crystalline cellulose is an important constituent of the plant cell wall. However, its quantification at a cellular resolution is technically challenging. Here, we report the use of polarized light technology and root cross sections to obtain information of cell wall composition at a spatiotemporal resolution.

結晶セルロース蓄積中の高解像度の定量化<em&gt;シロイヌナズナ</em&gt;ルーツは、組織特異的な細胞壁の変更を監視します

Plant cells are surrounded by a cell wall, the composition of which determines their final size and shape. The cell wall is composed of a complex matrix ...

High-resolution Time-lapse Imaging and Automated Analysis of Microtubule Dynamics in Living Human Umbilical Vein Endothelial Cells

The physiological process by which new vasculature forms from existing vasculature requires specific signaling events that trigger morphological changes within individual endothelial cells (ECs). These processes are critical for homeostatic maintenance such as wound healing, and are also crucial in promoting tumor growth and metastasis. EC morphology is defined by the organization of the cytoskeleton, a tightly regulated system of actin and microtubule (MT) dynamics that is known to control EC branching, polarity and directional migration, essential components of angiogenesis. To study MT dynamics, we used high-resolution fluorescence microscopy coupled with computational image analysis of fluorescently-labeled MT plus-ends to investigate MT growth dynamics and the regulation of EC branching morphology and directional migration. Time-lapse imaging of living Human Umbilical Vein Endothelial Cells (HUVECs) was performed following transfection with fluorescently-labeled MT End Binding protein 3 (EB3) and Mitotic Centromere Associated Kinesin (MCAK)-specific cDNA constructs to evaluate effects on MT dynamics. PlusTipTracker software was used to track EB3-labeled MT plus ends in order to measure MT growth speeds and MT growth lifetimes in time-lapse images. This methodology allows for the study of MT dynamics and the identification of how localized regulation of MT dynamics within sub-cellular regions contributes to the angiogenic processes of EC branching and migration.

Protocols for Human Umbilical Vein Endothelial Cell (HUVEC) culture, transient transfection of fluorescently-labeled markers of microtubule growth, live-cell imaging and automated analysis of interphase microtubule growth dynamics are detailed.

リビングヒト臍帯静脈内皮細胞における高解像度タイムラプスイメージングと微小管ダイナミクスの自動解析

The physiological process by which new vasculature forms from existing vasculature requires specific signaling events that trigger morphological changes ...

High-resolution Optical Mapping of the Mouse Sino-atrial Node

Sino-atrial node (SAN) dysfunctions and associated complications constitute important causes of morbidity in patients with cardiac diseases. The development of novel pharmacological therapies to cure these patients relies on the thorough understanding of both normal physiology and pathophysiology of the SAN. Among the studies of cardiac pacemaking, the mouse SAN is widely used due to its feasibility for modifications in the expression of different genes that encode SAN ion channels or calcium handling proteins. Emerging evidence from electrophysiological and histological studies has also proved the representativeness and similarity of the mouse SAN structure and functions to larger mammals, including the presence of specialized conduction pathways from the SAN to the atrium and a complex pacemakers' hierarchy within the SAN. Recently, the technique of optical mapping has greatly facilitated the exploration and investigation of the origin of excitation and conduction within and from the mouse SAN, which in turn has extended the understanding of the SAN and benefited clinical treatments of SAN dysfunction associated diseases. In this manuscript, we have described in detail how to perform the optical mapping of the mouse SAN from the intact, Langendorff-perfused heart and from the isolated atrial preparation. This protocol is a useful tool to enhance the understanding of mouse SAN physiology and pathophysiology.

Here, we present a protocol for optical mapping of electrical activity from the mouse right atrium and especially the sino-atrial node, at a high spatial and temporal resolution.