この作品は、公衆衛生のカリフォルニア部からNIH / NIAと07から65798からの補助金AG030709によってサポートされていました。我々は、サポートおよび試薬を提供するためのペプチドの合成とアミノ酸分析のためのマーガレットM.コンドロン、プロジェクトの最初のステップを支援し、サポートするための博士エリザベスF.ニューフェルド、博士カイ香港B.チェンを認識し、博士とアンドリューD有用な議論のため。エリントン。

<ol>
	<li>Monien, B. H., Apostolova, L. G., Bitan, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Early+diagnostics+and+therapeutics+for+Alzheimer's+disease-how+early+can+we+get+there.">Early diagnostics and therapeutics for Alzheimer's disease-how early can we get there.</a> Expert. Rev. Neurother. 6, 1293-1306 (2006).</li><li>Nestor, P. J., Scheltens, P., Hodges, J. R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Advances+in+the+early+detection+of+Alzheimer's+disease.">Advances in the early detection of Alzheimer's disease.</a> Nat. Med. 10, S34-S41 (2004).</li><li>Kawas, C. H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Clinical+practice.+Early+Alzheimer's+disease.">Clinical practice. Early Alzheimer's disease.</a> N. Engl. J. Med. 349, 1056-1063 (2003).</li><li>Haass, C., Selkoe, D. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Soluble+protein+oligomers+in+neurodegeneration:+lessons+from+the+Alzheimer's+amyloid+&#946;-peptide.">Soluble protein oligomers in neurodegeneration: lessons from the Alzheimer's amyloid &#946;-peptide.</a> Nat. Rev. Mol. Cell. Biol. 8, 101-112 (2007).</li><li>Kirkitadze, M. D., Bitan, G., Teplow, D. B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Paradigm+shifts+in+Alzheimer's+disease+and+other+neurodegenerative+disorders:+the+emerging+role+of+oligomeric+assemblies.">Paradigm shifts in Alzheimer's disease and other neurodegenerative disorders: the emerging role of oligomeric assemblies.</a> J. Neurosci. Res. 69, 567-577 (2002).</li><li>Rahimi, F., Shanmugam, A., Bitan, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Structure-function+relationships+of+pre-fibrillar+protein+assemblies+in+Alzheimer's+disease+and+related+disorders.">Structure-function relationships of pre-fibrillar protein assemblies in Alzheimer's disease and related disorders.</a> Curr. Alzheimer Res. 5, 319-341 (2008).</li><li>Jayasena, S. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Aptamers:+an+emerging+class+of+molecules+that+rival+antibodies+in+diagnostics.">Aptamers: an emerging class of molecules that rival antibodies in diagnostics.</a> Clin. Chem. 45, 1628-1650 (1999).</li><li>Bunka, D. H., Stockley, P. G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Aptamers+come+of+age+-+at+last.">Aptamers come of age - at last.</a> Nat. Rev. Microbiol. 4, 588-596 (2006).</li><li>Ellington, A. D., Szostak, J. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=In+vitro+selection+of+RNA+molecules+that+bind+specific+ligands.">In vitro selection of RNA molecules that bind specific ligands.</a> Nature. 346, 818-822 (1990).</li><li>Tuerk, C., Gold, L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Systematic+evolution+of+ligands+by+exponential+enrichment:+RNA+ligands+to+bacteriophage+T4+DNA+polymerase.">Systematic evolution of ligands by exponential enrichment: RNA ligands to bacteriophage T4 DNA polymerase.</a> Science. 249, 505-510 (1990).</li><li>Lee, J. F., Stovall, G. M., Ellington, A. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Aptamer+therapeutics+advance.">Aptamer therapeutics advance.</a> Curr. Opin. Chem. Biol. 10, 282-289 (2006).</li><li>Weiss, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=RNA+aptamers+specifically+interact+with+the+prion+protein+PrP.">RNA aptamers specifically interact with the prion protein PrP.</a> J. Virol. 71, 8790-8797 (1997).</li><li>Bibby, D. F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Application+of+a+novel+in+vitro+selection+technique+to+isolate+and+characterise+high+affinity+DNA+aptamers+binding+mammalian+prion+proteins.">Application of a novel in vitro selection technique to isolate and characterise high affinity DNA aptamers binding mammalian prion proteins.</a> J. Virol. Methods. 151, 107-115 (2008).</li><li>Rhie, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Characterization+of+2'-fluoro-RNA+aptamers+that+bind+preferentially+to+disease-associated+conformations+of+prion+protein+and+inhibit+conversion.">Characterization of 2'-fluoro-RNA aptamers that bind preferentially to disease-associated conformations of prion protein and inhibit conversion.</a> J. Biol. Chem. 278, 39697-39705 (2003).</li><li>King, D. J., Safar, J. G., Legname, G., Prusiner, S. B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Thioaptamer+interactions+with+prion+proteins:+sequence-specific+and+non-specific+binding+sites.">Thioaptamer interactions with prion proteins: sequence-specific and non-specific binding sites.</a> J. Mol. Biol. 369, 1001-1014 (2007).</li><li>Proske, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Prion-protein-specific+aptamer+reduces+PrPSc+formation.">Prion-protein-specific aptamer reduces PrPSc formation.</a> ChemBioChem. 3, 717-725 (2002).</li><li>Murakami, K., Nishikawa, F., Noda, K., Yokoyama, T., Nishikawa, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Anti-bovine+prion+protein+RNA+aptamer+containing+tandem+GGA+repeat+interacts+both+with+recombinant+bovine+prion+protein+and+its+&#946;+isoform+with+high+affinity.">Anti-bovine prion protein RNA aptamer containing tandem GGA repeat interacts both with recombinant bovine prion protein and its &#946; isoform with high affinity.</a> Prion. 2, 73-80 (2008).</li><li>Luhrs, T., Zahn, R., Wuthrich, K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Amyloid+formation+by+recombinant+full-length+prion+proteins+in+phospholipid+bicelle+solutions.">Amyloid formation by recombinant full-length prion proteins in phospholipid bicelle solutions.</a> J. Mol. Biol. 357, 833-841 (2006).</li><li>Bunka, D. H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Production+and+characterization+of+RNA+aptamers+specific+for+amyloid+fibril+epitopes.">Production and characterization of RNA aptamers specific for amyloid fibril epitopes.</a> J. Biol. Chem. 282, 34500-34509 (2007).</li><li>Ylera, F., Lurz, R., Erdmann, V. A., Furste, J. P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Selection+of+RNA+aptamers+to+the+Alzheimer's+disease+amyloid+peptide.">Selection of RNA aptamers to the Alzheimer's disease amyloid peptide.</a> Biochem. Biophys. Res. Commun. 290, 1583-1588 (2002).</li><li>Rahimi, F., Murakami, K., Summers, J. L., Chen, C. H., Bitan, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=RNA+aptamers+generated+against+oligomeric+A&#946;40+recognize+common+amyloid+aptatopes+with+low+specificity+but+high+sensitivity.">RNA aptamers generated against oligomeric A&#946;40 recognize common amyloid aptatopes with low specificity but high sensitivity.</a> PLoS ONE. 4, e7694-e7694 (2009).</li><li>Bitan, G., Lomakin, A., Teplow, D. B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Amyloid+&#946;-protein+oligomerization:+prenucleation+interactions+revealed+by+photo-induced+cross-linking+of+unmodified+proteins.">Amyloid &#946;-protein oligomerization: prenucleation interactions revealed by photo-induced cross-linking of unmodified proteins.</a> J. Biol. Chem. 276, 35176-35184 (2001).</li><li>Rahimi, F., Maiti, P., Bitan, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Photo-induced+cross-linking+of+unmodified+proteins+(PICUP)+applied+to+amyloidogenic+peptides.">Photo-induced cross-linking of unmodified proteins (PICUP) applied to amyloidogenic peptides.</a> J. Vis. Exp. , (2009).</li><li>Bitan, G., Fradinger, E. A., Spring, S. M., Teplow, D. B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Neurotoxic+protein+oligomers-what+you+see+is+not+always+what+you+get.">Neurotoxic protein oligomers-what you see is not always what you get.</a> Amyloid. 12, 88-95 (2005).</li><li>Bitan, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Structural+study+of+metastable+amyloidogenic+protein+oligomers+by+photo-induced+cross-linking+of+unmodified+proteins.">Structural study of metastable amyloidogenic protein oligomers by photo-induced cross-linking of unmodified proteins.</a> Methods Enzymol. 413, 217-236 (2006).</li><li>Chen, C. H., Chernis, G. A., Hoang, V. Q., Landgraf, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Inhibition+of+heregulin+signaling+by+an+aptamer+that+preferentially+binds+to+the+oligomeric+form+of+human+epidermal+growth+factor+receptor-3.">Inhibition of heregulin signaling by an aptamer that preferentially binds to the oligomeric form of human epidermal growth factor receptor-3.</a> Proc. Natl. Acad. Sci. USA. 100, 9226-9231 (2003).</li><li>Adams, D. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> Lab math: a handbook of measurements, calculations, and other quantitative skills for use at the bench. , (2003).</li><li>Gopinath, S. C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Methods+developed+for+SELEX.">Methods developed for SELEX.</a> Anal. Bioanal. Chem. 387, 171-182 (2007).</li><li>Takahashi, T., Tada, K., Mihara, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=RNA+aptamers+selected+against+amyloid+&#946;-peptide+(A&#946;)+inhibit+the+aggregation+of+A&#946;.">RNA aptamers selected against amyloid &#946;-peptide (A&#946;) inhibit the aggregation of A&#946;.</a> Mol. Biosyst. 5, 986-991 (2009).</li></ol>

利害の衝突は宣言されません。

SELEXプロセスの出発点は、通常、10 12 -10 15配列を含む、ランダムオリゴヌクレオチドライブラリーの合成です。 RNA SELEXで、ここに示したのに対し、DNA SELEXでは、このライブラリは、ssDNAのプールが生成された後に直接使用され、ssDNAのライブラリは、 インビトロ転写によって酵素的にRNAのプールに最初に変換されます。各サイクルが曝露と目的のターゲットへのオリゴ...

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		<div>
		<table border="1">
		<thead>
		<tr>
		<th>Material Name</th>
		<th>Type</th>
		<th>Company</th>
		<th>Catalogue Number</th>
		<th>Comment</th>
		</tr>
		</thead>
		<tbody>
		
<tr>
<td>A&beta;40</td>
<td>&nbsp;</td>
<td>UCLA Biopolymers Laboratory</td>
<td>&nbsp;</td>
<td>Lyophilized powder</td>
</tr>
<tr>
<td>MX5 Automated-S Microbalance</td>
<td>&nbsp;</td>
<td>Mettler Toledo</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Silicon-coated, 1.6-ml tubes</td>
<td>&nbsp;</td>
<td>Denville Scientific</td>
<td>C19033 or C19035</td>
<td>&nbsp;</td>
<tr>
<td>1,1,1,3,3,3-hexafluoro-2-propanol (HFIP)</td>
<td>&nbsp;</td>
<td>TCI America</td>
<td>H0424</td>
<td>Use in a fume hood.</td>
</tr>
<tr>
<td>Ammonium persulfate</td>
<td>&nbsp;</td>
<td>Sigma</td>
<td>A-7460</td>
<td>Vortex until the solution is clear. APS is prepared freshly each time and should be used within 48 h.</td>
</tr>
<tr>
<td>Tris(2,2-bipridyl)dichlororuthenium(II) hexahydrate</td>
<td>&nbsp;</td>
<td>Sigma</td>
<td>224758-1G</td>
<td>Vortex until the solution is clear. Cover the RuBpy tube with foil to protect the reagent from ambient light. RuBpy is prepared freshly each time and should be used within 48 h.</td>
</tr>
<tr>
<td>Dithiothreitol (DTT)</td>
<td>&nbsp;</td>
<td>Sigma</td>
<td>43815</td>
<td>&nbsp;</td>
<tr>
<td>D-Salt&trade; Excellulose&trade; desalting columns</td>
<td>&nbsp;</td>
<td>Thermo Scientific</td>
<td>20449</td>
<td>&nbsp;</td>
<tr>
<td>Ammonium acetate	</td>
<td>&nbsp;</td>
<td>Fisher Scientific</td>
<td>A637-500</td>
<td>&nbsp;</td>
<tr>
<td>Silicon-coated, 0.6-ml tubes</td>
<td>&nbsp;</td>
<td>Denville Scientific</td>
<td>C19063</td>
<td>&nbsp;</td>
<tr>
<td>Novex Tricine Gels (10&#x2013;20%)</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>EC6625B0X</td>
<td>10-well; mini size (8 cm X 8 cm); 25 &mu;l loading volume per well; separation range 5 kDa to 40 kDa</td>
</tr>
<tr>
<td>Quartz cuvette</td>
<td>&nbsp;</td>
<td>Hellma</td>
<td>105.250-QS</td>
<td>&nbsp;</td>
<tr>
<td>Beckman DU 640 spectrophotometer</td>
<td>&nbsp;</td>
<td>Beckman</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>ssDNA library</td>
<td>&nbsp;</td>
<td>Integrated DNA Technologies</td>
<td>Custom-ordered</td>
<td>The library was designed to contain 49 random nucleotides flanked by two constant regions containing primer-binding and cloning sites: 
5'-TAA TAC GAC TCA CTA TAG GGA ATT CCG CGT GTG C (N:25:25:25:25%) (N)49 G TCC GTT CGG GAT CCT C-3'</td>
</tr>
<tr>
<td>Taq DNA polymerase</td>
<td>&nbsp;</td>
<td>USB Corporation</td>
<td>71160</td>
<td>Recombinant Thermus aquaticus DNA Polymerase supplied with 10&#215; PCR Buffer and a separate tube of 25 mM MgCl2 for routine PCR.</td>
</tr>
<tr>
<td>PCR Nucleotide Mix, 10 mM solution</td>
<td>&nbsp;</td>
<td>USB Corporation</td>
<td>77212</td>
<td>(10 mM each dATP, dCTP, dGTP, dTTP)</td>
</tr>
<tr>
<td>Forward primer</td>
<td>&nbsp;</td>
<td>Integrated DNA Technologies</td>
<td>Custom-ordered</td>
<td>5'-TAA TAC GAC TCA CTA TAG GGA ATT CCG CGT GTG C-3'</td>
</tr>
<tr>
<td>Reverse primer</td>
<td>&nbsp;</td>
<td>Integrated DNA Technologies</td>
<td>Custom-ordered</td>
<td>5'-GAG GAT CCC GAA CGG AC-3'</td>
</tr>
<tr>
<td>Thermal cycler</td>
<td>&nbsp;</td>
<td>Denville Scientific</td>
<td>Techne TC-312</td>
<td>&nbsp;</td>
<tr>
<td>QIAquick PCR Purification Kit (50)</td>
<td>&nbsp;</td>
<td>QIAGEN</td>
<td>28104</td>
<td>&nbsp;</td>
<tr>
<td>Agarose</td>
<td>&nbsp;</td>
<td>Denville Scientific</td>
<td>CA3510-8</td>
<td>&nbsp;</td>
<tr>
<td>Conical, sterile 1.6-ml tubes with caps attached with O-rings</td>
<td>&nbsp;</td>
<td>Denville Scientific</td>
<td>C19040-S</td>
<td>&nbsp;</td>
<tr>
<td>RiboMAX&trade; Large Scale RNA Production System&#x2013;T7</td>
<td>&nbsp;</td>
<td>Promega</td>
<td>P1300</td>
<td>The kit contains: 120 &mu;l Enzyme Mix (RNA polymerase, recombinant RNasin&reg; ribonuclease inhibitor and recombinant inorganic pyrophosphatase); 240 &mu;l transcription 5 buffer; 100 &mu;l each of 4 rNTPs, 100 mM; 110 U RQ1 RNase-free DNase, 1 U/&mu;l; 10 &mu;l linear control DNA, 1 mg/ml; 1 ml 3M sodium acetate (pH 5.2); 1.25 ml nuclease-Free water</td>
</tr>
<tr>
<td>&alpha;-32P-cytidine 5'-triphosphate, 250 &mu;Ci (9.25 MBq), </td>
<td>&nbsp;</td>
<td>Perkin Elmer</td>
<td>BLU008H250UC</td>
<td>Specific Activity: 3000 Ci (111 TBq)/mmol, 50 mM Tricine (pH 7.6)</td>
</tr>
<tr>
<td>Citrate-saturated phenol:chloroform:isoamyl alcohol (125:24:1, pH 4.7)</td>
<td>&nbsp;</td>
<td>Sigma (Fluka)</td>
<td>77619</td>
<td>&nbsp;</td>
<tr>
<td>Chloroform:Isoamyl alcohol (24:1)</td>
<td>&nbsp;</td>
<td>Sigma</td>
<td>C0549</td>
<td>&nbsp;</td>
<tr>
<td>Absolute ethanol for molecular biology</td>
<td>&nbsp;</td>
<td>Sigma</td>
<td>E7023</td>
<td>&nbsp;</td>
<tr>
<td>Z216-MK refrigerated microcentrifuge</td>
<td>&nbsp;</td>
<td>Denville Scientific</td>
<td>C0216-MK</td>
<td>&nbsp;</td>
<tr>
<td>illustra ProbeQuant&trade; G-50 Micro Columns</td>
<td>&nbsp;</td>
<td>GE Healthcare</td>
<td>Obtained from Fisher Scientific (45-001-487)</td>
<td>Prepacked with Sephadex&trade; G-50 DNA Grade and pre-equilibrated in STE buffer containing 0.15% Kathon as Biocide</td>
</tr>
<tr>
<td>Triathler Bench-top Scintillation counter</td>
<td>&nbsp;</td>
<td>Hidex Oy, Turku, Finland</td>
<td>Triathler LSC Model: 425-034</td>
<td>&nbsp;</td>
<tr>
<td>Novex&reg; TBE-Urea Sample Buffer (2&#215;)</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>LC6876</td>
<td>&nbsp;</td>
<tr>
<td>6% TBE-Urea Gels 1.0 mm, 10 wells</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>EC6865BOX</td>
<td>&nbsp;</td>
<tr>
<td>Novex&reg; TBE Running Buffer (5&#215;)</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>LC6675</td>
<td>&nbsp;</td>
<tr>
<td>Radioactivity decontaminant</td>
<td>&nbsp;</td>
<td>Fisher Scientific</td>
<td>04-355-67</td>
<td>&nbsp;</td>
<tr>
<td>Gel-loading tips</td>
<td>&nbsp;</td>
<td>Denville Scientific</td>
<td>P3080</td>
<td>&nbsp;</td>
<tr>
<td>XCell SureLock Mini-Cell</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>EI0001</td>
<td>XCell SureLock Mini-Cell</td>
</tr>
<tr>
<td>Autoradiography film</td>
<td>&nbsp;</td>
<td>Denville Scientific</td>
<td>E3018</td>
<td>Use in complete darkness</td>
</tr>
<tr>
<td>Autoradiography film, Hyperfilm&trade; ECL</td>
<td>&nbsp;</td>
<td>Amersham Biosciences</td>
<td>RPN3114K</td>
<td>Can be used under red safe light.</td>
</tr>
<tr>
<td>Membrane discs</td>
<td>&nbsp;</td>
<td>Millipore</td>
<td>GSWP02500</td>
<td>Mixed cellulose ester, hydrophilic, 0.22-&mu;m disc membranes</td>
</tr>
<tr>
<td>Fritted glass support base for 125-ml flask</td>
<td>&nbsp;</td>
<td>VWR</td>
<td>26316-696</td>
<td>&nbsp;</td>
<tr>
<td>Petri dishes</td>
<td>&nbsp;</td>
<td>Fisher Scientific</td>
<td>08-757-11YZ</td>
<td>&nbsp;</td>
<tr>
<td>Urea	</td>
<td>&nbsp;</td>
<td>Fisher Scientific</td>
<td>AC32738-0050</td>
<td>&nbsp;</td>
<tr>
<td>EDTA</td>
<td>&nbsp;</td>
<td>Fisher Scientific</td>
<td>118430010</td>
<td>&nbsp;</td>
<tr>
<td>Glycogen</td>
<td>&nbsp;</td>
<td>Sigma</td>
<td>G1767</td>
<td>&nbsp;</td>
<tr>
<td>2-Propanol for molecular biology</td>
<td>&nbsp;</td>
<td>Sigma</td>
<td>I9516</td>
<td>&nbsp;</td>
<tr>
<td>Recombinant RNase inhibitor</td>
<td>&nbsp;</td>
<td>USB Corporation</td>
<td>71571</td>
<td>&nbsp;</td>
<tr>
<td>ImProm-II&trade;Reverse Transcription System</td>
<td>&nbsp;</td>
<td>Promega</td>
<td>A3802</td>
<td>&nbsp;</td>
<tr>
<td>Recombinant RNase inhibitor</td>
<td>&nbsp;</td>
<td>USB Corporation</td>
<td>71571</td>
<td>&nbsp;</td>
<tr>
<td>RapidRun&trade; Loading Dye</td>
<td>&nbsp;</td>
<td>USB Corporation</td>
<td>77524</td>
<td>&nbsp;</td>		</tbody>
		</table>
		</div>

selection of aptamers for amyloid &beta;-protein, the causative agent of alzheimer&#39;s disease

アルツハイマー病（AD）は1、その発症前診断が困難なレンダリング狡猾なコースを持つプログレッシブ、年齢依存性、神経変性疾患である。明確なADの診断は、このように、ADの発症前、早期診断が効果的な治療法2,3の開発と管理のための非常に重要である確立する、唯一の事後分析を実現しています。 アミロイドβ-蛋白質は（Aβ）ADの病因の中心です。水溶性、オリゴマーAβアセンブリはAD 4,5におけるシナプス機能障害とニューロンの損失の基礎となる神経毒性に影響を及ぼすと考えられている。可溶性Aβアセンブリの様々な形態が記載されている、しかし、それらの相互関係と、ADの病因および病因に関連性は複雑で、ウェル6理解されていない。症状が現れる前に、特定の分子認識ツールでは、Aβアセンブリ間の関係を解明し、疾患の過程で早期にこれらのアセンブリの検出と特徴付けを促進することができる。分子認識は、一般的に抗体に依存しています。しかし、分子認識ツールの代替クラス、アプタマーは、抗体7,8の相対重要な利点を提供しています。指数関数的濃縮（SELEX）9,10によるリガンドの系統進化：アプタマーは、 試験管内の選択によって生成されたオリゴヌクレオチドである。 SELEXは、ダーウィンの進化論に似て、可能にする、という反復的なプロセスであり、選択、増幅、濃縮、およびプロパティの永続化、など、熱心な、特定の、リガンド結合（アプタマー）または触媒活性（リボザイムとDNAzymes）。 現代のバイオテクノロジーと医学11のツールとしてのアプタマーの出現にもかかわらず、彼らはアミロイドの分野で十分に活用されています。いくつかのRNAまたはssDNAのアプタマーは、プリオン蛋白質（プリオン）12月16日の様々な形態に対して選択されています。組換えウシのPrPに対して生成されたRNAアプタマーは、アミロイド線維の18を形成する完全長のPrPの水溶性、オリゴマー、β-シートが豊富な立体配座の変異型、ウシのPrP -β17を認識することが示された。アプタマーは、線維のβ2 -ミクログロブリン（β2 m）の単量体といくつかの形式を使用して生成されたβ2メートルフィブリル19に加えて、特定の他のアミロイドタンパク質の線維を結合することが見出された。 Ylera ら 。固定化単量体のAβ4020に対して選択されたRNAアプタマーを説明した。不意に、これらのアプタマーは、線維Aβ40をバインド。完全に、これらのデータはいくつかの重要な問題を提起する。なぜ単量体のタンパク質に対して選択されたアプタマーは、それらのポリマー形態を認識するのですか？アミロイド生成性タンパク質の単量体及び/またはオリゴマーの形態に対するアプタマーが得られるか？これらの質問に対処するために、我々は、光誘起架橋無修正のタンパク質（PICUP）22,23を使用して生成された共有結合で安定化オリゴマーAβ4021のアプタマーを選択することを試みた。前回の調査結果17,19,20と同様に、これらのアプタマーは、おそらく構造aptatope 21潜在的に共通のアミロイドを認識Aβおよび他のいくつかのアミロイド蛋白質の線維と反応した。ここで、我々は、これらのアプタマー21の製造に使用されるSELEX方法論を提示する。

Watch this Scientific Journal Video about Selection of Aptamers for Amyloid ÃŽÂ²-Protein, the Causative Agent of Alzheimer's Disease at JoVE.com

Selection of Aptamers for Amyloid &#946;-Protein, the Causative Agent of Alzheimer's Disease

アプタマーは、で選択された短いribo-/deoxyribo-oligonucleotidesです<em&gt;体外</em&gt;特定のターゲットの親和性に基づく進化の方法。アプタマーは、多目的な治療、診断、および研究アプリケーションとの分子認識ツールです。我々は、アミロイドβ-蛋白質、アルツハイマー病の原因物質のためのアプタマーの選択のための方法を示しています。

アミロイドβ-蛋白質、アルツハイマー病の原因物質のためのアプタマーの選択

Alzheimer's disease (AD) is a progressive, age-dependent, neurodegenerative disorder with an insidious course that renders its presymptomatic diagnosis ...

selection-aptamers-for-amyloid-protein-causative-agent-alzheimer-s

Research

JoVE Journal

Neuroscience

Selection of Aptamers for Amyloid &beta;-Protein, the Causative Agent of Alzheimer&#39;s Disease

19.3K ビュー.  David Geffen School of Medicine. アプタマーは、で選択された短いribo-/deoxyribo-oligonucleotidesです体外特定のターゲットの親和性に基づく進化の方法。アプタマーは、多目的な治療、診断、および研究アプリケーションとの分子認識ツールです。我々は、アミロイドβ-蛋白質、アルツハイマー病の原因物質のためのアプタマーの選択のための方法を示しています。

ビデオ: Selection of Aptamers for Amyloid β-Protein, the Causative Agent of Alzheimer's Disease

Detection of Neuritic Plaques in Alzheimer's Disease Mouse Model

Alzheimer's disease (AD) is the most common neurodegenerative disorder leading to dementia. Neuritic plaque formation is one of the pathological hallmarks of Alzheimer's disease. The central component of neuritic plaques is a small filamentous protein called amyloid &beta; protein (A&beta;)1, which is derived from sequential proteolytic cleavage of the beta-amyloid precursor protein (APP) by &beta;-secretase and &gamma;-secretase. The amyloid hypothesis entails that A&gamma;-containing plaques as the underlying toxic mechanism in AD pathology2. The postmortem analysis of the presence of neuritic plaque confirms the diagnosis of AD. To further our understanding of A&gamma; neurobiology in AD pathogenesis, various mouse strains expressing AD-related mutations in the human APP genes were generated. Depending on the severity of the disease, these mice will develop neuritic plaques at different ages. These mice serve as invaluable tools for studying the pathogenesis and drug development that could affect the APP processing pathway and neuritic plaque formation. In this protocol, we employ an immunohistochemical method for specific detection of neuritic plaques in AD model mice. We will specifically discuss the preparation from extracting the half brain, paraformaldehyde fixation, cryosectioning, and two methods to detect neurotic plaques in AD transgenic mice: immunohistochemical detection using the ABC and DAB method and fluorescent detection using thiofalvin S staining method.

One of the pathological characteristics of AD is the formation of Amyloid &#x03B2; protein positive neuritic plaques. In this protocol we describe two methods to detect neuritic plaques in transgenic AD model mice: immunohistochemical detection using the ABC and DAB method and fluorescent detection using thioflavin S staining method.

アルツハイマー病のマウスモデルにおける神経突起斑の検出

Alzheimer's disease (AD) is the most common neurodegenerative disorder leading to dementia. Neuritic plaque formation is one of the pathological hallmarks ...

神経科学

Detection of Microregional Hypoxia in Mouse Cerebral Cortex by Two-photon Imaging of Endogenous NADH Fluorescence

The brain's ability to function at high levels of metabolic demand depends on continuous oxygen supply through blood flow and tissue oxygen diffusion. Here we present a visualized experimental and methodological protocol to directly visualize microregional tissue hypoxia and to infer perivascular oxygen gradients in the mouse cortex. It is based on the non-linear relationship between nicotinamide adenine dinucleotide (NADH) endogenous fluorescence intensity and oxygen partial pressure in the tissue, where observed tissue NADH fluorescence abruptly increases at tissue oxygen levels below 10 mmHg1. We use two-photon excitation at 740 nm which allows for concurrent excitation of intrinsic NADH tissue fluorescence and blood plasma contrasted with Texas-Red dextran. The advantages of this method over existing approaches include the following: it takes advantage of an intrinsic tissue signal and can be performed using standard two-photon in vivo imaging equipment; it permits continuous monitoring in the whole field of view with a depth resolution of ~50 &mu;m. We demonstrate that brain tissue areas furthest from cerebral blood vessels correspond to vulnerable watershed areas which are the first to become functionally hypoxic following a decline in vascular oxygen supply. This method allows one to image microregional cortical oxygenation and is therefore useful for examining the role of inadequate or restricted tissue oxygen supply in neurovascular diseases and stroke.

Here we describe a method to directly visualize microregional tissue hypoxia in the mouse cortex in vivo. It is based on concurrent two-photon imaging of nicotinamide adenine dinucleotide (NADH) and the cortical microcirculation. This method is useful for high resolution analysis of tissue oxygen supply.

内在性NADH蛍光の二光子イメージングによるマウス大脳皮質におけるMicroregional低酸素の検出

The brain's ability to function at high levels of metabolic demand depends on continuous oxygen supply through blood flow and tissue oxygen diffusion. ...

Whole Mount Immunolabeling of Olfactory Receptor Neurons in the Drosophila Antenna

Odorant molecules bind to their target receptors in a precise and coordinated manner. Each receptor recognizes a specific signal and relays this information to the brain. As such, determining how olfactory information is transferred to the brain, modifying both perception and behavior, merits investigation. Interestingly, there is emerging evidence that cellular transduction and transcriptional factors are involved in the diversification of olfactory receptor neuron. Here we provide a robust whole mount immunological labeling method to assay in vivo olfactory receptor neuron organization. Using this method, we identified all olfactory receptor neurons with anti-ELAV antibody, a known pan-neural marker and Or49a-mCD8::GFP, an olfactory receptor neuron specifically expressed in Nba neuron using anti-GFP antibody.

Whole Mount Immunolabeling of Olfactory Receptor Neurons in the Drosophila Antenna

Herein we describe the process of whole mount immunostaining of Drosophila antennae, which enables us to better understand the molecular mechanisms involved in the diversification of olfactory receptor neurons (ORN)s.

における嗅覚受容ニューロンのホールマウント免疫標識<em&gt;ショウジョウバエ</em&gt;アンテナ

Odorant molecules bind to their target receptors in a precise and coordinated manner. Each receptor recognizes a specific signal and relays this ...

Olfactory Assays for Mouse Models of Neurodegenerative Disease

In many neurodegenerative diseases and particularly in Parkinson&#8217;s disease, deficits in olfaction are reported to occur early in the disease process and may be a useful behavioral marker for early detection. Earlier detection in neurodegenerative disease is a major goal in the field because this is when neuroprotective therapies have the best potential to be effective. Therefore, in preclinical studies testing novel neuroprotective strategies in rodent models of neurodegenerative disease, olfactory assessment could be highly useful in determining therapeutic potential of compounds and translation to the clinic. In the present study we describe a battery of olfactory assays that are useful in measuring olfactory function in mice. The tests presented in this study were chosen because they measure olfaction abilities in mice related to food odors, social odors, and non-social odors. These tests have proven useful in characterizing novel genetic mouse models of Parkinson&#8217;s disease as well as in testing potential disease-modifying therapies.

Impairment in olfactory function is a common feature in many neurodegenerative disorders including Parkinson, Alzheimer, and Huntington diseases. In the present article, we describe a set of tests for assessing olfaction discrimination and detection in mice that can be used to measure olfactory abilities in mouse models of neurodegenerative diseases.

神経変性疾患のマウスモデルのための嗅覚アッセイ

In many neurodegenerative diseases and particularly in Parkinson&#8217;s disease, deficits in olfaction are reported to occur early in the disease process ...

Stereotaxic Infusion of Oligomeric Amyloid-beta into the Mouse Hippocampus

Alzheimer&#8217;s disease is a neurodegenerative disease affecting the aging population. A key neuropathological feature of the disease is the over-production of amyloid-beta and the deposition of amyloid-beta plaques in brain regions of the afflicted individuals. Throughout the years scientists have generated numerous Alzheimer&#8217;s disease mouse models that attempt to replicate the amyloid-beta pathology. Unfortunately, the mouse models only selectively mimic the disease features. Neuronal death, a prominent effect in the brains of Alzheimer&#8217;s disease patients, is noticeably lacking in these mice. Hence, we and others have employed a method of directly infusing soluble oligomeric species of amyloid-beta - forms of amyloid-beta that have been proven to be most toxic to neurons - stereotaxically into the brain. In this report we utilize male C57BL/6J mice to document this surgical technique of increasing amyloid-beta levels in a select brain region. The infusion target is the dentate gyrus of the hippocampus because this brain structure, along with the basal forebrain that is connected by the cholinergic circuit, represents one of the areas of degeneration in the disease. The results of elevating amyloid-beta in the dentate gyrus via stereotaxic infusion reveal increases in neuron loss in the dentate gyrus within 1 week, while there is a concomitant increase in cell death and cholinergic neuron loss in the vertical limb of the diagonal band of Broca of the basal forebrain. These effects are observed up to 2 weeks. Our data suggests that the current amyloid-beta infusion model provides an alternative mouse model to address region specific neuron death in a short-term basis. The advantage of this model is that amyloid-beta can be elevated in a spatial and temporal manner.

Here, we present a protocol for direct stereotaxic brain infusion of amyloid-beta. This methodology provides an alternative in vivo mouse model to address the short-term effects of amyloid-beta on brain neurons.

マウス海馬にオリゴマーアミロイドベータの定位注入

Alzheimer&#8217;s disease is a neurodegenerative disease affecting the aging population. A key neuropathological feature of the disease is the ...

Why Quantification Matters: Characterization of Phenotypes at the Drosophila Larval Neuromuscular Junction

Most studies on morphogenesis rely on qualitative descriptions of how anatomical traits are affected by the disruption of specific genes and genetic pathways. Quantitative descriptions are rarely performed, although genetic manipulations produce a range of phenotypic effects and variations are observed even among individuals within control groups.&#160;Emerging evidence shows that morphology, size and location of organelles play a previously underappreciated, yet fundamental role in cell function and survival. Here we provide step-by-step instructions for performing quantitative analyses of phenotypes at the Drosophila larval neuromuscular junction (NMJ). We use several reliable immuno-histochemical markers combined with bio-imaging techniques and morphometric analyses to examine the effects of genetic mutations on specific cellular processes. In particular, we focus on the quantitative analysis of phenotypes affecting morphology, size and position of nuclei within the striated muscles of Drosophila larvae. The Drosophila larval NMJ is a valuable experimental model to investigate the molecular mechanisms underlying the structure and the function of the neuromuscular system, both in health and disease. However, the methodologies we describe here can be extended to other systems as well.

Why Quantification Matters: Characterization of Phenotypes at the Drosophila Larval Neuromuscular Junction

Morphology, size and location of intracellular organelles are evolutionarily conserved and appear to directly affect their function. Understanding the molecular mechanisms underlying these processes has become an important goal of modern biology. Here we show how these studies can be facilitated by the application of quantitative techniques.

なぜ定量事項：での表現型のキャラクタリゼーション<em&gt;ショウジョウバエ</em&gt;幼虫の神経筋接合部

Most studies on morphogenesis rely on qualitative descriptions of how anatomical traits are affected by the disruption of specific genes and genetic ...

In Vivo Single-Molecule Tracking at the Drosophila Presynaptic Motor Nerve Terminal

An increasing number of super-resolution microscopy techniques are helping to uncover the mechanisms that govern the nanoscale cellular world. Single-molecule imaging is gaining momentum as it provides exceptional access to the visualization of individual molecules in living cells. Here, we describe a technique that we developed to perform single-particle tracking photo-activated localization microscopy (sptPALM) in Drosophila larvae. Synaptic communication relies on key presynaptic proteins that act by docking, priming, and promoting the fusion of neurotransmitter-containing vesicles with the plasma membrane. A range of protein-protein and protein-lipid interactions tightly regulates these processes and the presynaptic proteins therefore exhibit changes in mobility associated with each of these key events. Investigating how mobility of these proteins correlates with their physiological function in an intact live animal is essential to understanding their precise mechanism of action. Extracting protein mobility with high resolution in vivo requires overcoming limitations such as optical transparency, accessibility, and penetration depth. We describe how photoconvertible fluorescent proteins tagged to the presynaptic protein Syntaxin-1A can be visualized via slight oblique illumination and tracked at the motor nerve terminal or along the motor neuron axon of the third instar Drosophila larva.

In Vivo Single-Molecule Tracking at the Drosophila Presynaptic Motor Nerve Terminal

Here we illustrate how single molecule photo-activated localization microscopy can be carried out on the motor nerve terminal of a live Drosophila melanogaster third instar larva.

生体内で1 分子追跡ショウジョウバエ運動神経がシナプス前ターミナルで

An increasing number of super-resolution microscopy techniques are helping to uncover the mechanisms that govern the nanoscale cellular world. ...

Visualization of Amyloid &#946; Deposits in the Human Brain with Matrix-assisted Laser Desorption/Ionization Imaging Mass Spectrometry

The neuropathology of Alzheimer&#39;s disease (AD) is characterized by the accumulation and aggregation of amyloid &#946; (A&#946;) peptides into extracellular plaques of the brain. The A&#946; peptides, composed of 40 amino acids, are generated from amyloid precursor proteins (APP) by &#946;- and &#947;-secretases. A&#946; is deposited not only in cerebral parenchyma but also in leptomeningeal and cerebral vessel walls, known as cerebral amyloid angiopathy (CAA). While a variety of A&#946; peptides were identified, the detailed production and distribution of individual A&#946; peptides in pathological tissues of AD and CAA have not been fully addressed. Here, we develop a protocol of matrix-assisted laser desorption/ionization-based imaging mass spectrometry (MALDI-IMS) on human autopsy brain tissues to obtain comprehensive protein mapping. For this purpose, human cortical specimens were obtained from the Brain Bank at the Tokyo Metropolitan Institute of Gerontology. Frozen cryosections are cut and transferred to indium-tin-oxide (ITO)-coated glass slides. Spectra are acquired using the MALDI system with a spatial resolution up to 20 &#181;m. Sinapinic acid (SA) is uniformly deposited on the slide using either an automatic or a manual sprayer. With the current technical advantages of MALDI-IMS, a typical data set of various A&#946; species within the same sections of human autopsied brains can be obtained without specific probes. Furthermore, high-resolution (20 &#181;m) imaging of an AD brain and severe CAA sample clearly shows that A&#946;1-36 to A&#946;1-41 were deposited into leptomeningeal vessels, while A&#946;1-42 and A&#946;1-43 were deposited in cerebral parenchyma as senile plaque (SP). It is feasible to adopt MALDI-IMS as a standard approach in combination with clinical, genetic, and pathological observations in understanding the pathology of AD, CAA, and other neurological diseases based on the current strategy.

Molecular imaging with matrix-assisted laser desorption/ionization-based imaging mass spectrometry (MALDI-IMS) allows the simultaneous mapping of multiple analytes in biological samples. Here, we present a protocol for the detection and visualization of amyloid &#946; protein on brain tissues of Alzheimer&#39;s disease and cerebral amyloid angiopathy samples using MALDI-IMS.

マトリックス支援レーザー脱離イオン化質量顕微鏡を用いたひと脳のアミロイド β の堆積物の可視化

The neuropathology of Alzheimer&#39;s disease (AD) is characterized by the accumulation and aggregation of amyloid &#946; (A&#946;) peptides into ...

Labeling and Imaging of Amyloid Plaques in Brain Tissue Using the Natural Polyphenol Curcumin

Deposition of amyloid beta protein (A&#946;) in extra- and intracellular spaces is one of the hallmark pathologies of Alzheimer&#39;s disease (AD). Therefore, detection of the presence of A&#946; in AD brain tissue is a valuable tool for developing new treatments to prevent the progression of AD. Several classical amyloid binding dyes, fluorochrome, imaging probes, and A&#946;-specific antibodies have been used to detect A&#946; histochemically in AD brain tissue. Use of these compounds for A&#946; detection is costly and time consuming. However, because of its intense fluorescent activity, high-affinity, and specificity for A&#946;, as well as structural similarities with traditional amyloid binding dyes, curcumin (Cur) is a promising candidate for labeling and imaging of A&#946; plaques in postmortem brain tissue. It is a natural polyphenol from the herb Curcuma longa. In the present study, Cur was used to histochemically label A&#946; plaques from both a genetic mouse model of 5x familial Alzheimer&#39;s disease (5xFAD) and from human AD tissue within a minute. The labeling capability of Cur was compared to conventional amyloid binding dyes, such as thioflavin-S (Thio-S), Congo red (CR), and Fluoro-jade C (FJC), as well as A&#946;-specific antibodies (6E10 and A11). We observed that Cur is the most inexpensive and quickest way to label and image A&#946; plaques when compared to these conventional dyes and is comparable to A&#946;-specific antibodies. In addition, Cur binds with most A&#946; species, such as oligomers and fibrils. Therefore, Cur could be used as the most cost-effective, simple, and quick fluorochrome detection agent for A&#946; plaques.

Curcumin is an ideal fluorophore for labeling and imaging of amyloid beta protein plaques in brain tissue due to its preferential binding to amyloid beta protein as well as its structural similarities with other traditional amyloid binding dyes. It can be used to label and image amyloid beta protein plaques more efficiently and inexpensively than traditional methods.

天然ポリフェノールクルクミンを用いた脳組織におけるアミロイドプラークの標識とイメージング

Deposition of amyloid beta protein (A&#946;) in extra- and intracellular spaces is one of the hallmark pathologies of Alzheimer&#39;s disease (AD). ...

Stereological Estimation of Cholinergic Fiber Length in the Nucleus Basalis of Meynert of the Mouse Brain

The length of cholinergic or other neuronal axons in various brain regions are often correlated with the specific function of the region. Stereology is a useful method to quantify neuronal profiles of various brain structures. Here we provide a software-based stereology protocol to estimate the total length of cholinergic fibers in the nucleus basalis of Meynert (NBM) of the basal forebrain. The method uses a space ball probe for length estimates. The cholinergic fibers are visualized by choline acetyltransferase (ChAT) immunostaining with the horseradish peroxidase-diaminobenzidine (HRP-DAB) detection system. The staining protocol is also valid for fiber and cell number estimation in various brain regions using stereology software. The stereology protocol can be used for estimation of any linear profiles such as cholinoceptive fibers, dopaminergic/catecholaminergic fibers, serotonergic fibers, astrocyte processes, or even vascular profiles.

Neuronal fiber length within a three-dimensional structure of a brain region is a reliable parameter to quantify specific neuronal structural integrity or degeneration. This article details a stereological quantification method to measure cholinergic fiber length within the nucleus basalis of Meynert in mice as an example.

マウス脳のマイナート核基底部におけるコリン作動性繊維長の立体的推定

The length of cholinergic or other neuronal axons in various brain regions are often correlated with the specific function of the region. Stereology is a ...

アミロイドβ-蛋白質、アルツハイマー病の原因物質のためのアプタマーの選択

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