Gli autori ringraziano il Dr. Julia Mannheim, Walter Ehrlichmann, Ramona Stumm, Funda Cay, Daniel Bukala, Maren Harant così come Natalie Altmeyer per il sostegno durante gli esperimenti e analisi dei dati. Questo lavoro è stato supportato dal Werner Siemens-Fondazione, la DFG attraverso lo SFB685 (progetto B6) e Fortune (2309-0-0).

<ol>
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Gli autori non hanno nulla da rivelare.

Questo protocollo presenta un metodo affidabile e facile da radiomarcato stabilmente cellule per il monitoraggio in vivo mediante PET. Utilizzando questo metodo, le cellule cova-TH1, isolate ed espanse in vitro da donatore topi, potrebbe essere radiomarcato con 64 Cu-DOTA-KJ1-26-mAb e il loro homing è stato rintracciato alle LNs polmonari e perithymic come siti di presentazione Cova in un cova indotta DTHR vie respiratorie acute. La modifica del mAb con il chela...

Inseguimento cella non invasiva è uno strumento versatile per monitorare la funzione cellulare, la migrazione e homing in vivo. Recenti studi di monitoraggio delle cellule mesenchimali si sono concentrati su 1, 2 o del midollo osseo di cellule staminali derivate 3 nel contesto della medicina rigenerativa, periferiche autologhe globuli bianchi a infiammazione o linfociti T in terapie cellulari adottivi contro il cancro 3, 4. La spiegazione dei siti di azione ei principi biologici sottostanti di terapie a base di cellule è di enorme importanza. I linfociti T citotossici CD8 +, geneticamente antigene recettore chimerico cellule T (CAR) o linfociti infiltranti il tumore (TIL) sono stati ampiamente considerato come il gold standard. Tuttavia, le cellule TH1 antigene-specifiche associati al tumore hanno dimostrato di essere un efficace opzione di trattamento alternativa 4, &lt;/ sup&gt; 5, 6, 7. Come attori chiave infiammazione, malattie autoimmuni organo-specifiche (ad esempio, l&#39;artrite reumatoide o asma bronchiale), e le cellule di elevato interesse in immunoterapia del cancro, è importante caratterizzare la distribuzione e homing modelli temporali di cellule TH1. Invasiva imaging in vivo da PET presenta un metodo altamente sensibile quantitativa 8 per esaminare i modelli di migrazione cellulare, in vivo homing, ed i siti di azione delle cellule T e risposte durante l&#39;infiammazione, allergie, infezioni o tumore rifiuto 9, 10, 11. Clinicamente, 111 In ossina viene utilizzato per leucociti scintigrafia per la discriminazione di infiammazione e infezione 12, mentre 2-deossi-2- (18F) fluoro-D-glucosio (18 F-FDG) viene comunemente utilizzato per studi di localizzazione cellulare mediante PET 3, 13. Uno svantaggio principale di questo tracciante PET, tuttavia, è la breve emivita del radionuclide 18 F a 109,7 min e la bassa stabilità intracellulare che ostacola l&#39;imaging in momenti successivi caricare trasferimento adottivo di cellule. A lungo termine studi in vivo inseguimento cellulare mediante PET, anche se instabile nelle cellule, 64 Cu-PTSM viene frequentemente usato per marcare le cellule non specifico 14, 15 con effetti dannosi minimizzati sulla vitalità delle cellule T e funzionamento 16. Questo protocollo descrive un metodo per ridurre ulteriormente gli effetti svantaggiosi sulla vitalità delle cellule e la funzione utilizzando un recettore di cellule T (TCR) -specifica radiomarcato mAb. In primo luogo, la produzione del radioisotopo 64 Cu, la coniugazione del mAb KJ1-26 con the chelante DOTA, ed il successivo 64 Cu-radiomarcatura sono mostrati. In una seconda fase, l&#39;isolamento e l&#39;espansione delle cellule cova-TH1 di topi donatori DO11.10 e la radiomarcatura con 64 Cu-caricata DOTA-coniugato mAb KJ1-26 (64 Cu-DOTA-KJ1-26) sono descritte in dettaglio. La valutazione dei valori di assunzione e efflusso di radioattività con un calibratore di dosi e y-conteggio, rispettivamente, nonché la valutazione degli effetti di 64 Cu-radiomarcatura sulla vitalità cellulare mediante trypan blu e funzionalità con IFN-y ELISA sono rappresentati . Per non invasiva nel monitoraggio delle cellule in vivo, l&#39;elicitazione di un modello murino di cova indotta acuta delle vie aeree e DTHR immagine acquisizione da PET / TC dopo trasferimento adottivo di cellule sono descritti. Inoltre, questo approccio etichettatura può essere trasferito a diversi modelli di malattia, cellule T murine con differenti TCR o cellule generali di interesse con recettori di membrana o espressione markers sottostante membrana continua spola 17.

<table border="0" cellpadding="0" cellspacing="0" width="966">
	<tbody>
		<tr height="24">
			<td height="24" style="height:24px;width:292px;">HCl, Suprapur</td>
			<td style="width:227px;">Merck, Darmstadt, Germany</td>
			<td style="width:259px;">1.00318</td>
			<td style="width:189px;">64Cu production</td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:292px;">Methanol, Suprapur</td>
			<td style="width:227px;">Merck, Darmstadt, Germany</td>
			<td>1.06007</td>
			<td>64Cu production</td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:292px;">Isopropanol, Suprapur</td>
			<td style="width:227px;">Merck, Darmstadt, Germany</td>
			<td>1.0104</td>
			<td>64Cu production</td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:292px;">Pt/Ir (90/10) plate</td>
			<td style="width:227px;">&#214;gussa</td>
			<td style="width:259px;">Custom made</td>
			<td>64Cu production</td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:292px;">PEEK chamber</td>
			<td style="width:227px;">&#214;gussa</td>
			<td style="width:259px;">Custom made</td>
			<td>64Cu production</td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:292px;">64Ni</td>
			<td style="width:227px;">Chemotrade</td>
			<td style="width:259px;"></td>
			<td>64Cu production</td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:292px;">Polygram SIL G/UV 254 plate</td>
			<td style="width:227px;">Macherey-Nagel</td>
			<td style="width:259px;">805021</td>
			<td>64Cu production</td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:292px;">Ion exchange column</td>
			<td style="width:227px;">BioRad</td>
			<td style="width:259px;">AG1-X8</td>
			<td>64Cu production</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Solid state target system for PETtrace</td>
			<td style="width:227px;">WKL</td>
			<td style="width:259px;">costum made</td>
			<td>64Cu production</td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:292px;">64Cu work-up module</td>
			<td style="width:227px;">WKL</td>
			<td style="width:259px;">costum made</td>
			<td>64Cu production</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Dose calibrator</td>
			<td style="width:227px;">Capintec</td>
			<td style="width:259px;">CRC-25R</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">PETtrace cyclotron</td>
			<td style="width:227px;">General Electric Medical Systems</td>
			<td style="width:259px;"></td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">DOTA-NHS</td>
			<td style="width:227px;">Macrocyclics</td>
			<td style="width:259px;">B-280</td>
			<td>DOTA-conjugation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Anti-cOVA-TCR antibody (KJ1-26)</td>
			<td style="width:227px;"></td>
			<td>Isolated from hybridoma cell culture</td>
			<td>DOTA-conjugation</td>
		</tr>
		<tr height="26">
			<td height="26" style="height:26px;width:292px;">Na2HPO4</td>
			<td style="width:227px;">Sigma-Aldrich</td>
			<td style="width:259px;">71633</td>
			<td>DOTA-conjugation</td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:292px;">H+ Chelex 100</td>
			<td style="width:227px;">Sigma-Aldrich</td>
			<td style="width:259px;">C7901</td>
			<td>DOTA-conjugation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Amicon Ultra-15 filter unit</td>
			<td style="width:227px;">Merck Millipore</td>
			<td style="width:259px;">UFC910008</td>
			<td>DOTA-conjugation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Rotipuran ultrapure water</td>
			<td style="width:227px;">Carl Roth</td>
			<td style="width:259px;">HN68.3</td>
			<td>DOTA-conjugation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Ammonium acetate</td>
			<td style="width:227px;">Sigma-Aldrich</td>
			<td>32301</td>
			<td>DOTA-conjugation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">PBS</td>
			<td style="width:227px;">University Tuebingen</td>
			<td style="width:259px;"></td>
			<td>DOTA-conjugation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Micro Bio-spin P-6 column</td>
			<td style="width:227px;">Bio-Rad Laboratories</td>
			<td style="width:259px;">7326221</td>
			<td>DOTA-conjugation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Sodium citrate</td>
			<td style="width:227px;">Sigma-Aldrich</td>
			<td style="width:259px;">71497</td>
			<td>DOTA-conjugation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Cyclone Plus PhosphorImager&#160;</td>
			<td style="width:227px;">Perkin-Elmer</td>
			<td>L2250116</td>
			<td>DOTA-conjugation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">DMEM</td>
			<td style="width:227px;">Merck Millipore</td>
			<td>102568</td>
			<td>ingredient for T cell medium&#160;</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">FCS</td>
			<td style="width:227px;">Merck Millipore</td>
			<td style="width:259px;">S0115/1004B</td>
			<td>ingredient for T cell medium&#160;</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Sodium pyruvate</td>
			<td style="width:227px;">Merck Millipore</td>
			<td style="width:259px;">L0473</td>
			<td>ingredient for T cell medium&#160;</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">MEM-amino acids</td>
			<td style="width:227px;">Merck Millipore</td>
			<td style="width:259px;">K0293</td>
			<td>ingredient for T cell medium&#160;</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">HEPES&#160;</td>
			<td style="width:227px;">Merck Millipore</td>
			<td style="width:259px;">L 1613</td>
			<td>ingredient for T cell medium&#160;</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">&#160;Penicillin/Streptomycin</td>
			<td style="width:227px;">Merck Millipore</td>
			<td style="width:259px;">A2212</td>
			<td>ingredient for T cell medium&#160;</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">0.05 mM 2-&#946;-mercaptoethanol</td>
			<td style="width:227px;">Sigma-Aldrich</td>
			<td style="width:259px;">M3148</td>
			<td>ingredient for T cell medium&#160;</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">DO11.10 mice</td>
			<td style="width:227px;"></td>
			<td>in-house breeding</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">DPBS</td>
			<td style="width:227px;">Gibco</td>
			<td style="width:259px;">14190144</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Cell strainer 40 &#181;m&#160;</td>
			<td style="width:227px;">Corning</td>
			<td style="width:259px;">352340</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">ACK Lysing Buffer</td>
			<td style="width:227px;">Lonza</td>
			<td style="width:259px;">10-548E</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">CD4 MicroBeads, mouse</td>
			<td style="width:227px;">Miltenyi Biotech</td>
			<td style="width:259px;">130-097-145</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">QuadroMACS separator</td>
			<td style="width:227px;">Miltenyi Biotech</td>
			<td style="width:259px;">130-090-976</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">LS column</td>
			<td style="width:227px;">Miltenyi Biotech</td>
			<td style="width:259px;">130-042-401</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">anti-CD4 antibody (Gk1.5)</td>
			<td style="width:227px;"></td>
			<td>Isolated from hybridoma cell culture</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">anti-CD8 antibody (5367.2)</td>
			<td style="width:227px;"></td>
			<td>Isolated from hybridoma cell culture</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Anti-rat antibody (MAR18.5)</td>
			<td style="width:227px;"></td>
			<td>Isolated from hybridoma cell culture</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Rabbit complement MA</td>
			<td style="width:227px;">tebu-Bio</td>
			<td style="width:259px;">CL3221</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Anti-IL-4 antibody (11B11)</td>
			<td style="width:227px;"></td>
			<td>Isolated from hybridoma cell culture</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">cOVA 323-339-peptide&#160;</td>
			<td style="width:227px;">EMC-micro-collections</td>
			<td>Custom order</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">CPG1668-oligonucleotides</td>
			<td style="width:227px;">Eurofins MWG Operon</td>
			<td>Custom order</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">IL-2</td>
			<td style="width:227px;">Novartis</td>
			<td>65483-116-07</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">96-well plates</td>
			<td style="width:227px;">Greiner&#160;</td>
			<td>655180</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">24-well plates</td>
			<td style="width:227px;">Greiner&#160;</td>
			<td>662160</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">cell culture flask</td>
			<td style="width:227px;">Greiner&#160;</td>
			<td>660175</td>
			<td>TH1 cell culture</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">48-well plates</td>
			<td style="width:227px;">Greiner&#160;</td>
			<td>677 180</td>
			<td>cell labeling</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Gammacell 1000</td>
			<td style="width:227px;">Best Theratronics</td>
			<td>via inquiry&#160;</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Gulmay RT225</td>
			<td style="width:227px;">Gulmay</td>
			<td>via inquiry&#160;</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Trypan blue</td>
			<td style="width:227px;">Merck Millipore</td>
			<td style="width:259px;">L6323</td>
			<td>in vitro evaluation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Mouse IFN-&#947; ELISA</td>
			<td style="width:227px;">BD Biosciences</td>
			<td style="width:259px;">558258</td>
			<td>in vitro evaluation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">PE Annexin V Apoptosis Detection Kit&#160;</td>
			<td style="width:227px;">BD Biosciences</td>
			<td style="width:259px;">559763</td>
			<td>in vitro evaluation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Tube 5 ml</td>
			<td style="width:227px;">Sarstedt</td>
			<td style="width:259px;">55.476</td>
			<td>in vitro evaluation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Round-bottom tubes&#160;</td>
			<td style="width:227px;">BD Biosciences</td>
			<td style="width:259px;">352008</td>
			<td>in vitro evaluation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Wizard &#947;-counter</td>
			<td style="width:227px;">Perkin-Elmer</td>
			<td>2480-0010</td>
			<td>in vitro evaluation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">ELISA Reader MultiscanEX</td>
			<td style="width:227px;">Thermo Fisher Scientific</td>
			<td>51118177</td>
			<td>in vitro evaluation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Microscope</td>
			<td style="width:227px;">Leica</td>
			<td>via inquiry&#160;</td>
			<td>in vitro evaluation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">BD LSRII&#160;</td>
			<td style="width:227px;">BD Biosciences</td>
			<td>via inquiry&#160;</td>
			<td>in vitro evaluation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">BALB/c mice</td>
			<td style="width:227px;">Charles River</td>
			<td style="width:259px;">028</td>
			<td>in vivo cell trafficking</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Aluminum gel</td>
			<td style="width:227px;">Serva Electrophoresis</td>
			<td style="width:259px;">12261.01</td>
			<td>in vivo cell trafficking</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Xylazine</td>
			<td style="width:227px;">Bayer HealthCare</td>
			<td>Ordered via University hospital</td>
			<td>in vivo cell trafficking</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Ketamine</td>
			<td style="width:227px;">Ratiopharm</td>
			<td>Ordered via University hospital</td>
			<td>in vivo cell trafficking</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Isoflurane</td>
			<td style="width:227px;">CP-Pharma</td>
			<td>Ordered via University hospital</td>
			<td>in vivo cell trafficking</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">30G needle</td>
			<td style="width:227px;">BD Biosciences</td>
			<td>304000</td>
			<td>in vivo cell trafficking</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Syringe</td>
			<td style="width:227px;">BD Biosciences</td>
			<td>11612491</td>
			<td>in vivo cell trafficking</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Capillaries 10 &#181;l</td>
			<td style="width:227px;">VWR</td>
			<td>612-2439</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Inveon PET scanner</td>
			<td style="width:227px;">Siemens Healthineers</td>
			<td style="width:259px;">no longer available</td>
			<td>in vivo cell trafficking, alternative companies: Bruker, Mediso&#160;</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Inveon SPECT/CT scanner</td>
			<td style="width:227px;">Siemens Healthineers</td>
			<td style="width:259px;">no longer available</td>
			<td>in vivo cell trafficking</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:292px;">Inveon Research Workplace</td>
			<td style="width:227px;">Siemens Healthineers</td>
			<td style="width:259px;"></td>
			<td>image analysis, alternative software: Pmod</td>
		</tr>
	</tbody>
</table>

murine lymphocyte labeling by 64cu-antibody receptor targeting for in vivo cell trafficking by pet/ct

Questo protocollo illustra la produzione di 64 Cu e il chelante coniugazione / radiomarcatura di un anticorpo monoclonale (mAb) seguita da coltura cellulare linfociti murino e recettori 64 Cu-anticorpo di targeting delle cellule. Valutazione in vitro del prodotto radiomarcato e non invasivo nel monitoraggio delle cellule in vivo in un modello animale di una via aerea di tipo ritardato reazione di ipersensibilità (DTHR) PET / TC sono descritti. In particolare, viene mostrata la coniugazione di un mAb con il chelante acido 1,4,7,10-tetraazaciclododecan-1,4,7,10-tetraacetico (DOTA). Seguendo la produzione di radioattivo 64 Cu, radiomarcatura del DOTA-coniugato mAb è descritto. Successivamente, l&#39;espansione di ovalbumina di pollo (Cova) CD4 + -specific interferone (IFN) -γ-producendo cellule T helper (cova-TH1) e la successiva radiomarcatura delle cellule cova-TH1 sono raffigurati. Varie tecniche in vitro sono presentati per valutare l&#39;effetti di 64 Cu-radiomarcatura sulle cellule, quali la determinazione della vitalità cellulare mediante trypan blu, la colorazione per apoptosi con annessina V per citometria a flusso, e la valutazione della funzionalità da IFN-γ saggio di immunoassorbimento enzimatico (ELISA) . Inoltre, la determinazione della captazione radioattivo nelle cellule e la stabilità etichettatura sono descritte in dettaglio. Questo protocollo descrive inoltre come eseguire studi di tracciamento delle cellule in un modello animale di una DTHR delle vie aeree e, di conseguenza, l&#39;induzione di cova indotta DHTR acuta delle vie aeree a / c topi BALB è incluso. Infine, un robusto workflow / CT PET inclusa l&#39;acquisizione delle immagini, ricostruzione, e l&#39;analisi è presentato. L&#39;approccio di targeting recettore 64Cu-anticorpo con successiva internalizzazione recettoriale fornisce alta specificità e stabilità, ridotta tossicità cellulare, e tassi di efflusso bassi rispetto ai comuni PET traccianti per l&#39;etichettatura di cellule, ad esempio 64 Cubis -pyruvaldehyde (N4-methylthiosemicarbazone) (64 Cu-PTSM). Infine, il nostro approccio consente non invasivo in cellule inseguimento vivo mediante PET / TC con un ottimo rapporto segnale-sfondo per 48 h. Questo approccio sperimentale può essere trasferito a diversi modelli animali e tipi di cellule con recettori di membrana che sono internalizzati.

Figura 1 riassume l&#39;etichettatura di cellule cova-TH1 con il 64 Cu-DOTA-KJ1-26-mAb e il disegno sperimentale per l&#39;in vitro ed in vivo contemplati in questo protocollo. <img alt="Figura 1" src="/files/ftp_upload/55270/55270fig1.jpg" /> Figura 1: 64 Cu-DOTA-KJ1-26-mAb etichettatura Process &amp; Experimental Design. (A) Rappr...

Watch this Scientific Journal Video about Murine Lymphocyte Labeling by 64Cu-Antibody Receptor Targeting for In Vivo  Cell Trafficking by PET/CT at JoVE.com

Murine Lymphocyte Labeling by 64Cu-Antibody Receptor Targeting for In Vivo  Cell Trafficking by PET/CT

Seguendo la preparazione di un anticorpo monoclonale 64 Cu-modificata legandosi ad un recettore delle cellule T transgenico murino, cellule T sono radiomarcato in vivo, analizzati per la vitalità, funzionalità, stabilità etichettatura e apoptosi e adoptively trasferite in topi con una cannula ipersensibilità di tipo ritardato reazione per l&#39;imaging non invasiva mediante tomografia a emissione di positroni / tomografia computerizzata (PET / CT).

Murino linfociti Etichettatura da<sup&gt; 64</sup&gt; Cu-anticorpo recettore Targeting per<em&gt; In Vivo</em&gt; Cell Traffico da PET / CT

This protocol illustrates the production of 64Cu and the chelator conjugation/radiolabeling of a monoclonal antibody (mAb) followed by murine lymphocyte ...

murine-lymphocyte-labeling-64cu-antibody-receptor-targeting-for-vivo

Research

JoVE Journal

Immunology and Infection

Murine Lymphocyte Labeling by 64Cu-Antibody Receptor Targeting for In Vivo Cell Trafficking by PET/CT

8.7K Views.  Eberhard Karls University Tübingen.  Seguendo la preparazione di un anticorpo monoclonale 64 Cu-modificata legandosi ad un recettore delle cellule T transgenico murino, cellule T sono radiomarcato in vivo, analizzati per la vitalità, funzionalità, stabilità etichettatura e apoptosi e adoptively trasferite in topi con una cannula ipersensibilità di tipo ritardato reazione per l'imaging non invasiva mediante tomografia a emissione di positroni / tomografia computerizzata (PET / CT)...

Video: Murine Lymphocyte Labeling by 64Cu-Antibody Receptor Targeting for In Vivo  Cell Trafficking by PET/CT

Following Cell-fate in E. coli After Infection by Phage Lambda

The system comprising bacteriophage (phage) lambda and the bacterium E. coli has long served as a paradigm for cell-fate determination1,2. Following the simultaneous infection of the cell by a number of phages, one of two pathways is chosen: lytic (virulent) or lysogenic (dormant)3,4. We recently developed a method for fluorescently labeling individual phages, and were able to examine the post-infection decision in real-time under the microscope, at the level of individual phages and cells5. Here, we describe the full procedure for performing the infection experiments described in our earlier work5. This includes the creation of fluorescent phages, infection of the cells, imaging under the microscope and data analysis. The fluorescent phage is a "hybrid", co-expressing wild- type and YFP-fusion versions of the capsid gpD protein. A crude phage lysate is first obtained by inducing a lysogen of the gpD-EYFP (Enhanced Yellow Fluorescent Protein) phage, harboring a plasmid expressing wild type gpD. A series of purification steps are then performed, followed by DAPI-labeling and imaging under the microscope. This is done in order to verify the uniformity, DNA packaging efficiency, fluorescence signal and structural stability of the phage stock. The initial adsorption of phages to bacteria is performed on ice, then followed by a short incubation at 35&deg;C to trigger viral DNA injection6. The phage/bacteria mixture is then moved to the surface of a thin nutrient agar slab, covered with a coverslip and imaged under an epifluorescence microscope. The post-infection process is followed for 4 hr, at 10 min interval. Multiple stage positions are tracked such that ~100 cell infections can be traced in a single experiment. At each position and time point, images are acquired in the phase-contrast and red and green fluorescent channels. The phase-contrast image is used later for automated cell recognition while the fluorescent channels are used to characterize the infection outcome: production of new fluorescent phages (green) followed by cell lysis, or expression of lysogeny factors (red) followed by resumed cell growth and division. The acquired time-lapse movies are processed using a combination of manual and automated methods. Data analysis results in the identification of infection parameters for each infection event (e.g. number and positions of infecting phages) as well as infection outcome (lysis/lysogeny). Additional parameters can be extracted if desired.

Following Cell-fate in E. coli After Infection by Phage Lambda

This article describes the procedure for preparing a fluorescently-labeled version of bacteriophage lambda, infection of E. coli bacteria, following the infection outcome under the microscope, and analysis of infection results.

A seguito di Cell-destino<em&gt; E. coli</em&gt; Dopo l&#39;infezione da fago lambda

The system comprising bacteriophage (phage) lambda and the bacterium E. coli has long served as a paradigm for cell-fate determination1,2. Following the ...

Ricerca

Immunologia e infezioni

Induction of Murine Intestinal Inflammation by Adoptive Transfer of Effector CD4+CD45RBhigh T Cells into Immunodeficient Mice

There are many different animal models available for studying the pathogenesis of human inflammatory bowel diseases (IBD), each with its own advantages and disadvantages. We describe here an experimental colitis model that is initiated by adoptive transfer of syngeneic splenic CD4+CD45RBhigh T cells into T and B cell deficient recipient mice. The CD4+CD45RBhigh T cell population that largely consists of na&#239;ve effector cells is capable of inducing chronic intestinal inflammation, closely resembling key aspects of human IBD. This method can be manipulated to study aspects of disease onset and progression. Additionally it can be used to study the function of innate, adaptive, and regulatory immune cell populations, and the role of environmental exposures, i.e., the microbiota, in intestinal inflammation. In this article we illustrate the methodology for inducing colitis with a step-by-step protocol. This includes a video demonstration of key technical aspects required to successfully develop this murine model of experimental colitis for research purposes.

Induction of Murine Intestinal Inflammation by Adoptive Transfer of Effector CD4+CD45RBhigh T Cells into Immunodeficient Mice

Here, we present a protocol to induce colonic inflammation in mice by adoptive transfer of syngeneic CD4+CD45RBhigh T cells into T and B cell deficient recipients. Clinical and histopathological features mimic human inflammatory bowel diseases. This method allows the study of the initiation of colonic inflammation and progression of disease.

Induzione di Murine infiammazione intestinale per trasferimento adottivo di Effector CD4<sup&gt; +</sup&gt; CD45RB<sup&gt; Alto</sup&gt; T Cells in topi immunodeficienti

There are many different animal models available for studying the pathogenesis of human inflammatory bowel diseases (IBD), each with its own advantages ...

Lymphocyte Isolation from Human Skin for Phenotypic Analysis and Ex Vivo Cell Culture

Human skin has an important barrier function and contains various immune cells that contribute to tissue homeostasis and protection from pathogens. As the skin is relatively easy to access, it provides an ideal platform to study peripheral immune regulatory mechanisms. Immune resident cells in healthy skin conduct immunosurveillance, but also play an important role in the development of inflammatory skin disorders, such as psoriasis. Despite emerging insights, our understanding of the biology underlying various inflammatory skin diseases is still limited. There is a need for good quality (single) cell populations isolated from biopsied skin samples. So far, isolation procedures have been seriously hampered by a lack of obtaining a sufficient number of viable cells. Isolation and subsequent analysis have also been affected by the loss of immune cell lineage markers, due to the mechanical and chemical stress caused by the current dissociation procedures to obtain single cell suspension. Here, we describe a modified method to isolate T cells from both healthy and involved psoriatic human skin by combining mechanical skin dissociation using an automated tissue dissociator and collagenase treatment. This methodology preserves expression of most immune lineage markers such as CD4, CD8, Foxp3 and CD11c upon the preparation of single cell suspensions. Examples of successful CD4+ T cell isolation and subsequent phenotypic and functional analysis are shown.

Lymphocyte Isolation from Human Skin for Phenotypic Analysis and Ex Vivo Cell Culture

We describe a protocol to efficiently isolate skin resident T cells from human skin biopsies. This protocol yields sufficient numbers of viable human skin resident lymphocytes for flow cytometric analysis and ex vivo culture.

Linfociti Isolamento da Pelle umana per l&#39;analisi fenotipica e<em&gt; Ex Vivo</em&gt; Cell Culture

Human skin has an important barrier function and contains various immune cells that contribute to tissue homeostasis and protection from pathogens. As the ...

Femur Window Chamber Model for In Vivo Cell Tracking in the Murine Bone Marrow

Bone marrow is a complex organ that contains various hematopoietic and non-hematopoietic cells. These cells are involved in many biological processes, including hematopoiesis, immune regulation and tumor regulation. Commonly used methods for understanding cellular actions in the bone marrow, such as histology and blood counts, provide static information rather than capturing the dynamic action of multiple cellular components in vivo. To complement the standard methods, a window chamber (WC)-based model was developed to enable serial in vivo imaging of cells and structures in the murine bone marrow. This protocol describes a surgical procedure for installing the WC in the femur, in order to facilitate long-term optical access to the femoral bone marrow. In particular, to demonstrate its experimental utility, this WC approach was used to image and track neutrophils within the vascular network of the femur, thereby providing a novel method to visualize and quantify immune cell trafficking and regulation in the bone marrow. This method can be applied to study various biological processes in the murine bone marrow, such as hematopoiesis, stem cell transplantation, and immune responses in pathological conditions, including cancer.

Femur Window Chamber Model for In Vivo Cell Tracking in the Murine Bone Marrow

The protocol describes a novel murine femur window chamber model that can be used to track movement of cells in the femoral bone marrow in vivo. Intravital multiphoton fluorescence microscopy is used to image three components of the femoral bone marrow (vasculature, collagen matrix, and neutrophils) over time.

Femore finestra del modello Camera per<em&gt; In Vivo</em&gt; Monitoraggio delle cellule nel midollo osseo murino

Bone marrow is a complex organ that contains various hematopoietic and non-hematopoietic cells. These cells are involved in many biological processes, ...

Detection of Trypanosoma brucei Variant Surface Glycoprotein Switching by Magnetic Activated Cell Sorting and Flow Cytometry

Trypanosoma brucei, a protozoan parasite that causes both Human and Animal African Trypanosomiasis (known as sleeping sickness and nagana, respectively) cycles between a tsetse vector and a mammalian host. It evades the mammalian host immune system by periodically switching the dense, variant surface glycoprotein (VSG) that covers its surface. The detection of antigenic variation in Trypanosoma brucei can be both cumbersome and labor intensive. Here, we present a method for quantifying the number of parasites that have 'switched' to express a new VSG in a given population. The parasites are first stained with an antibody against the starting VSG, and then stained with a secondary antibody attached to a magnetic bead. Parasites expressing the starting VSG are then separated from the rest of the population by running the parasites over a column attached to a magnet. Parasites expressing the dominant, starting VSG are retained on the column, while the flow-through contains parasites that express a new VSG as well as some contaminants expressing the starting VSG. This flow-through population is stained again with a fluorescently labeled antibody against the starting VSG to label contaminants, and propidium iodide (PI), which labels dead cells. A known number of absolute counting beads that are visible by flow cytometry are added to the flow-through population. The ratio of beads to number of cells collected can then be used to extrapolate the number of cells in the entire sample. Flow cytometry is used to quantify the population of switchers by counting the number of PI negative cells that do not stain positively for the starting, dominant VSG. The proportion of switchers in the population can then be calculated using the flow cytometry data.

Detection of Trypanosoma brucei Variant Surface Glycoprotein Switching by Magnetic Activated Cell Sorting and Flow Cytometry

African trypanosomes grown in vitro undergo antigenic variation at a low rate, such that populations are made up of parasites expressing a dominant variant surface glycoprotein (VSG) type and a small population of "switched" variants. This protocol describes a fast method for detecting and quantifying these populations.

rilevamento di<em&gt; Trypanosoma brucei</em&gt; Switching Variante superficie glicoproteina da magnetico cellulare Attivato Ordinamento e citometria a flusso

Trypanosoma brucei, a protozoan parasite that causes both Human and Animal African Trypanosomiasis (known as sleeping sickness and nagana, respectively) ...

Detection of Enterohemorrhagic Escherichia Coli Colonization in Murine Host by Non-invasive In Vivo Bioluminescence System

Enterohemorrhagic E. coli (EHEC) O157:H7, which is a foodborne pathogen that causesdiarrhea, hemorrhagic colitis (HS), and hemolytic uremic syndrome (HUS), colonize to the intestinal tract of humans. To study the detailed mechanism of EHEC colonization in vivo, it is essential to have animal models to monitor and quantify EHEC colonization. We demonstrate here a mouse-EHEC colonization model by transforming the bioluminescent expressing plasmid to EHEC to monitor and quantify EHEC colonization in living hosts. Animals inoculated with bioluminescence-labeled EHEC show intense bioluminescent signals in mice by detection with a non-invasive in vivo imaging system. After 1 and 2 days post infection, bioluminescent signals could still be detected in infected animals, which suggests that EHEC colonize in hosts for at least 2 days. We also demonstrate that these bioluminescent EHEC locate to mouse intestine, specifically in the cecum and colon, from ex vivo images. This mouse-EHEC colonization model may serve as a tool to advance the current knowledge of the EHEC colonization mechanism.

Detection of Enterohemorrhagic Escherichia Coli Colonization in Murine Host by Non-invasive In Vivo Bioluminescence System

A detailed protocol of a mouse model for enterohemorrhagic E. coli (EHEC) colonization by using bioluminescence-labeled bacteria is presented. The detection of these bioluminescent bacteria by a non-invasive in vivo imaging system in live animals can advance our current understanding of EHEC colonization.

Rilevamento della colonizzazione di Escherichia Coli enteroemorragica in murino Host di sistema Non invasivo In Vivo bioluminescenza

Enterohemorrhagic E. coli (EHEC) O157:H7, which is a foodborne pathogen that causesdiarrhea, hemorrhagic colitis (HS), and hemolytic uremic syndrome ...

Quantifying Human Monocyte Chemotaxis In Vitro and Murine Lymphocyte Trafficking In Vivo

Chemotaxis is migration along a specific chemical gradient1. Chemokines are chemotactic cytokines that promote cellular trafficking with anatomic and temporal specificity2. Chemotaxis is a critical function of lymphocytes and other immune cells that can be quantitatively assessed in vitro. This manuscript describes methods that permit the evaluation of chemotaxis, both in vitro and in vivo, for diverse cell types including cell lines and native cells. The in vitro, plate-based format permits the comparison of several conditions simultaneously in real-time, and can be completed within 1-4 h. In vitro assay conditions can be manipulated to introduce agonists and antagonists, as well as differentiate chemotaxis from chemokinesis, which is random movement. For in vivo trafficking assessments, immune cells can be labeled with multiple fluorescent dyes and used for adoptive transfer. The differential labeling of cells allows for mixed cell populations to be introduced into the same animal, thereby decreasing variance and reducing the number of animals required for an adequately powered experiment. Migration into lymphoid tissue occurs in as little as 1 h, and multiple tissue compartments can be sampled. Flow cytometry following tissue harvest allows for a rapid and quantitative analysis of the migratory patterns of multiple cell types.

Quantifying Human Monocyte Chemotaxis In Vitro and Murine Lymphocyte Trafficking In Vivo

Protocols for quantitative assessment of lymphocyte chemotaxis and migration are important tools for immunology research. Here, an in vitro protocol is described that permits real-time, multiplexed evaluation of cell migration, as well as a complementary in vivo technique enabling tracking of native cells to spleen.

Quantificazione del linfocita murino traffico In Vivo e chemiotassi del monocito umano In Vitro

Chemotaxis is migration along a specific chemical gradient1. Chemokines are chemotactic cytokines that promote cellular trafficking with anatomic and ...

Analysis of 18FDG PET/CT Imaging as a Tool for Studying Mycobacterium tuberculosis Infection and Treatment in Non-human Primates

Mycobacterium tuberculosis remains the number one infectious agent in the world today. With the emergence of antibiotic resistant strains, new clinically relevant methods are needed that evaluate the disease process and screen for potential antibiotic and vaccine treatments. Positron Emission Tomography/Computed Tomography (PET/CT) has been established as a valuable tool for studying a number of afflictions such as cancer, Alzheimer&#39;s disease, and inflammation/infection. Outlined here are a number of strategies that have been employed to evaluate PET/CT images in cynomolgus macaques that are infected intrabronchially with low doses of M. tuberculosis. Through evaluation of lesion size on CT and uptake of 18F-fluorodeoxyglucose (FDG) in lesions and lymph nodes in PET images, these described methods show that PET/CT imaging can predict future development of active versus latent disease and the propensity for reactivation from a latent state of infection. Additionally, by analyzing the overall level of lung inflammation, these methods determine antibiotic efficacy of drugs against M. tuberculosis in the most clinically relevant existing animal model. These image analysis methods are some of the most powerful tools in the arsenal against this disease as not only can they evaluate a number of characteristics of infection and drug treatment, but they are also directly translatable to a clinical setting for use in human studies.

Analysis of 18FDG PET/CT Imaging as a Tool for Studying Mycobacterium tuberculosis Infection and Treatment in Non-human Primates

Here, we present a protocol to describe the analysis of 18F-FDG PET/CT imaging in non-human primates that have been infected with M. tuberculosis to study disease process, drug treatment, and disease reactivation.

Analisi di 18FDG PET/CT Imaging come strumento per studiare l'infezione di tubercolosi del micobatterio e trattamento in primati Non umani

Mycobacterium tuberculosis remains the number one infectious agent in the world today. With the emergence of antibiotic resistant strains, new clinically ...

Visualizing Intracellular SNARE Trafficking by Fluorescence Lifetime Imaging Microscopy

Soluble N-ethylmaleimide sensitive fusion protein (NSF) attachment protein receptor (SNARE) proteins are key for membrane trafficking, as they catalyze membrane fusion within eukaryotic cells. The SNARE protein family consists of about 36 different members. Specific intracellular transport routes are catalyzed by specific sets of 3 or 4 SNARE proteins that thereby contribute to the specificity and fidelity of membrane trafficking. However, studying the precise function of SNARE proteins is technically challenging, because SNAREs are highly abundant and functionally redundant, with most SNAREs having multiple and overlapping functions. In this protocol, a new method for the visualization of SNARE complex formation in live cells is described. This method is based on expressing SNARE proteins C-terminally fused to fluorescent proteins and measuring their interaction by F&#246;rster resonance energy transfer (FRET) employing fluorescence lifetime imaging microscopy (FLIM). By fitting the fluorescence lifetime histograms with a multicomponent decay model, FRET-FLIM allows (semi-)quantitative estimation of the fraction of the SNARE complex formation at different vesicles. This protocol has been successfully applied to visualize SNARE complex formation at the plasma membrane and at endosomal compartments in mammalian cell lines and primary immune cells, and can be readily extended to study SNARE functions at other organelles in animal, plant, and fungal cells.

This protocol describes a new method allowing for the quantitative visualization of complex formation of SNARE proteins, based on F&#246;rster resonance energy transfer, and fluorescence lifetime imaging microscopy.

Visualizing intracellulare rullante traffico da fluorescenza Lifetime Imaging microscopia

Soluble N-ethylmaleimide sensitive fusion protein (NSF) attachment protein receptor (SNARE) proteins are key for membrane trafficking, as they catalyze ...

Assessment of Lymphocyte Migration in an Ex Vivo Transmigration System

Herein, we present an efficient method that can be executed with basic laboratory skills and materials to assess lymphocyte chemokinetic movement in an ex vivo transmigration system. Group 2 innate lymphoid cells (ILC2) and CD4+ T helper cells were isolated from spleens and lungs of chicken egg ovalbumin (OVA)-challenged BALB/c mice. We confirmed the expression of CCR4 on both CD4+ T cells and ILC2, comparatively. CCL17 and CCL22 are the known ligands for CCR4; therefore, using this ex vivo transmigration method we examined CCL17- and CCL22-induced movement of CCR4+ lymphocytes. To establish chemokine gradients, CCL17 and CCL22 were placed in the bottom chamber of the transmigration system. Isolated lymphocytes were then added to top chambers and over a 48 h period the lymphocytes actively migrated through 3 &#181;m pores towards the chemokine in the bottom chamber. This is an effective system for determining the chemokinetics of lymphocytes, but, understandably, does not mimic the complexities found in the in vivo organ microenvironments. This is one limitation of the method that can be overcome by the addition of in situ imaging of the organ and lymphocytes under study. In contrast, the advantage of this method is that is can be performed by an entry-level technician at a much more cost-effective rate than live imaging. As therapeutic compounds become available to enhance migration, as in the case of tumor infiltrating cytotoxic immune cells, or to inhibit migration, perhaps in the case of autoimmune diseases where immunopathology is of concern, this method can be used as a screening tool. In general, the method is effective if the chemokine of interest is consistently generating chemokinetics at a statistically higher level than the media control. In such cases, the degree of inhibition/enhancement by a given compound can be determined as well.

In this protocol, lymphocytes are placed in the top chamber of a transmigration system, separated from the bottom chamber by a porous membrane. Chemokine is added to the bottom chamber, which induces active migration along a chemokine gradient. After 48 h, lymphocytes are counted in both chambers to quantitate transmigration.

Valutazione della migrazione dei linfociti in un sistema di trasmigrazione Ex Vivo

Herein, we present an efficient method that can be executed with basic laboratory skills and materials to assess lymphocyte chemokinetic movement in an ex ...

Murino linfociti Etichettatura da

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A seguito di Cell-destino

Induzione di Murine infiammazione intestinale per trasferimento adottivo di Effector CD4

Linfociti Isolamento da Pelle umana per l'analisi fenotipica e

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Rilevamento della colonizzazione di Escherichia Coli enteroemorragica in murino Host di sistema Non invasivo In Vivo bioluminescenza

Quantificazione del linfocita murino traffico In Vivo e chemiotassi del monocito umano In Vitro

Analisi di ¹⁸FDG PET/CT Imaging come strumento per studiare l'infezione di tubercolosi del micobatterio e trattamento in primati Non umani

Visualizing intracellulare rullante traffico da fluorescenza Lifetime Imaging microscopia

Valutazione della migrazione dei linfociti in un sistema di trasmigrazione Ex Vivo