This work was funded by a grant from the National Medical Research Council of Singapore (NMRC/CIRG/1335/2012) awarded to Professor Kesavan Esuvaranathan.

<ol>
	<li>Gunther, J. 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=Optimizing+syngeneic+orthotopic+murine+bladder+cancer+(MB49).">Optimizing syngeneic orthotopic murine bladder cancer (MB49).</a> Cancer Res. 59, 2834-2837 (1999).</li><li>Dobek, G. L., Godbey, W. T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=An+orthotopic+model+of+murine+bladder+cancer.">An orthotopic model of murine bladder cancer.</a> Journal of visualized experiments : JoVE. , (2011).</li><li>Chade, D. C., 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=Histopathological+characterization+of+a+syngeneic+orthotopic+murine+bladder+cancer+model.">Histopathological characterization of a syngeneic orthotopic murine bladder cancer model.</a> Int Braz J Urol. 34, 220-226 (2008).</li><li>Chan, E. 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=Optimizing+orthotopic+bladder+tumor+implantation+in+a+syngeneic+mouse+model.">Optimizing orthotopic bladder tumor implantation in a syngeneic mouse model.</a> J Urol. 182, 2926-2931 (2009).</li><li>Kasman, L., Voelkel-Johnson, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=An+orthotopic+bladder+cancer+model+for+gene+delivery+studies.">An orthotopic bladder cancer model for gene delivery studies.</a> Journal of visualized experiments : JoVE. , e50181 (2013).</li><li>Ninalga, C., Loskog, A., Klevenfeldt, M., Essand, M., Totterman, T. H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=CpG+oligonucleotide+therapy+cures+subcutaneous+and+orthotopic+tumors+and+evokes+protective+immunity+in+murine+bladder+cancer.">CpG oligonucleotide therapy cures subcutaneous and orthotopic tumors and evokes protective immunity in murine bladder cancer.</a> J Immunother. 28, 20-27 (2005).</li><li>Tham, S. M., Ng, K. H., Pook, S. H., Esuvaranathan, K., Mahendran, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Tumor+and+Microenvironment+Modification+during+Progression+of+Murine+Orthotopic+Bladder+Cancer.">Tumor and Microenvironment Modification during Progression of Murine Orthotopic Bladder Cancer.</a> Clin Dev Immunol. , 865684 (2011).</li><li>Chin, J., Kadhim, S., Garcia, B., Kim, Y. S., Karlik, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Magnetic+resonance+imaging+for+detecting+and+treatment+monitoring+of+orthotopic+murine+bladder+tumor+implants.">Magnetic resonance imaging for detecting and treatment monitoring of orthotopic murine bladder tumor implants.</a> J Urol. 145, 1297-1301 (1991).</li><li>Kikuchi, E., 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=Detection+and+quantitative+analysis+of+early+stage+orthotopic+murine+bladder+tumor+using+in+vivo+magnetic+resonance+imaging.">Detection and quantitative analysis of early stage orthotopic murine bladder tumor using in vivo magnetic resonance imaging.</a> J Urol. 170, 1375-1378 (2003).</li><li>Sweeney, S. K., Luo, Y., O'Donnell, M. A., Assouline, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Nanotechnology+and+cancer:+improving+real-time+monitoring+and+staging+of+bladder+cancer+with+multimodal+mesoporous+silica+nanoparticles.">Nanotechnology and cancer: improving real-time monitoring and staging of bladder cancer with multimodal mesoporous silica nanoparticles.</a> Cancer nanotechnology. 7, 3 (2016).</li><li>Tanaka, 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=Noninvasive+detection+of+bladder+cancer+in+an+orthotopic+murine+model+with+green+fluorescence+protein+cytology.">Noninvasive detection of bladder cancer in an orthotopic murine model with green fluorescence protein cytology.</a> J Urol. 170, 975-978 (2003).</li><li>Jurczok, A., Fornara, P., Soling, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Bioluminescence+imaging+to+monitor+bladder+cancer+cell+adhesion+in+vivo:+a+new+approach+to+optimize+a+syngeneic,+orthotopic,+murine+bladder+cancer+model.">Bioluminescence imaging to monitor bladder cancer cell adhesion in vivo: a new approach to optimize a syngeneic, orthotopic, murine bladder cancer model.</a> BJU Int. 101, 120-124 (2008).</li><li>Newton, M. R., 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=Anti-interleukin-10R1+monoclonal+antibody+in+combination+with+bacillus+Calmette--Guerin+is+protective+against+bladder+cancer+metastasis+in+a+murine+orthotopic+tumour+model+and+demonstrates+systemic+specific+anti-tumour+immunity.">Anti-interleukin-10R1 monoclonal antibody in combination with bacillus Calmette--Guerin is protective against bladder cancer metastasis in a murine orthotopic tumour model and demonstrates systemic specific anti-tumour immunity.</a> Clin Exp Immunol. 177, 261-268 (2014).</li><li>Patel, A. R., 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=Transabdominal+micro-ultrasound+imaging+of+bladder+cancer+in+a+mouse+model:+a+validation+study.">Transabdominal micro-ultrasound imaging of bladder cancer in a mouse model: a validation study.</a> Urology. 75, 799-804 (2010).</li><li>Wu, Q., Esuvaranathan, K., Mahendran, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Monitoring+the+response+of+orthotopic+bladder+tumors+to+granulocyte+macrophage+colony-stimulating+factor+therapy+using+the+prostate-specific+antigen+gene+as+a+reporter.">Monitoring the response of orthotopic bladder tumors to granulocyte macrophage colony-stimulating factor therapy using the prostate-specific antigen gene as a reporter.</a> Clin Cancer Res. 10, 6977-6984 (2004).</li><li>Luo, Y., Chen, X., O'Donnell, M. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Use+of+prostate+specific+antigen+to+measure+bladder+tumor+growth+in+a+mouse+orthotopic+model.">Use of prostate specific antigen to measure bladder tumor growth in a mouse orthotopic model.</a> J Urol. 172, 2414-2420 (2004).</li><li>Coralli, C., Cemazar, M., Kanthou, C., Tozer, G. M., Dachs, G. U. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Limitations+of+the+reporter+green+fluorescent+protein+under+simulated+tumor+conditions.">Limitations of the reporter green fluorescent protein under simulated tumor conditions.</a> Cancer Res. 61, 4784-4790 (2001).</li><li>Biot, C., 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=Preexisting+BCG-specific+T+cells+improve+intravesical+immunotherapy+for+bladder+cancer.">Preexisting BCG-specific T cells improve intravesical immunotherapy for bladder cancer.</a> Sci Transl Med. 4 (137), 137ra172 (2012).</li><li>Swirski, F. 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=A+near-infrared+cell+tracker+reagent+for+multiscopic+in+vivo+imaging+and+quantification+of+leukocyte+immune+responses.">A near-infrared cell tracker reagent for multiscopic in vivo imaging and quantification of leukocyte immune responses.</a> PLoS One. 2, 1075 (2007).</li><li>Jozwicki, W., Brozyna, A. A., Siekiera, J., Slominski, A. T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Frequency+of+CD4+CD25+Foxp3++cells+in+peripheral+blood+in+relation+to+urinary+bladder+cancer+malignancy+indicators+before+and+after+surgical+removal.">Frequency of CD4+CD25+Foxp3+ cells in peripheral blood in relation to urinary bladder cancer malignancy indicators before and after surgical removal.</a> Oncotarget. , (2016).</li><li>Walk, E. L., McLaughlin, S. L., Weed, S. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=High-frequency+Ultrasound+Imaging+of+Mouse+Cervical+Lymph+Nodes.">High-frequency Ultrasound Imaging of Mouse Cervical Lymph Nodes.</a> J Vis Exp. , e52718 (2015).</li><li>Rooks, V., Beecken, W. D., Iordanescu, I., Taylor, G. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Sonographic+evaluation+of+orthotopic+bladder+tumors+in+mice+treated+with+TNP-470,+an+angiogenic+inhibitor.">Sonographic evaluation of orthotopic bladder tumors in mice treated with TNP-470, an angiogenic inhibitor.</a> Academic radiology. 8, 121-127 (2001).</li><li>Folin, O., Morris, J. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=On+the+determination+of+creatinine+and+creatine+in+urine.">On the determination of creatinine and creatine in urine.</a> JBC. 17, 469-473 (1914).</li><li>Dykman, L. A., Bogatyrev, V. A., Khlebtsov, B. N., Khlebtsov, N. G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+protein+assay+based+on+colloidal+gold+conjugates+with+trypsin.">A protein assay based on colloidal gold conjugates with trypsin.</a> Anal Biochem. 341, 16-21 (2005).</li><li>Shi, H. W., 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=Joint+enhancement+strategy+applied+in+ECL+biosensor+based+on+closed+bipolar+electrodes+for+the+detection+of+PSA.">Joint enhancement strategy applied in ECL biosensor based on closed bipolar electrodes for the detection of PSA.</a> Talanta. 154, 169-174 (2016).</li><li>Ma, 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=Electrochemiluminescent+immunosensing+of+prostate-specific+antigen+based+on+silver+nanoparticles-doped+Pb+(II)+metal-organic+framework.">Electrochemiluminescent immunosensing of prostate-specific antigen based on silver nanoparticles-doped Pb (II) metal-organic framework.</a> Biosensors &amp; bioelectronics. 79, 379-385 (2016).</li><li>Kavosi, B., Salimi, A., Hallaj, R., Moradi, F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Ultrasensitive+electrochemical+immunosensor+for+PSA+biomarker+detection+in+prostate+cancer+cells+using+gold+nanoparticles/PAMAM+dendrimer+loaded+with+enzyme+linked+aptamer+as+integrated+triple+signal+amplification+strategy.">Ultrasensitive electrochemical immunosensor for PSA biomarker detection in prostate cancer cells using gold nanoparticles/PAMAM dendrimer loaded with enzyme linked aptamer as integrated triple signal amplification strategy.</a> Biosensors &amp; bioelectronics. 74, 915-923 (2015).</li><li>Lu, 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=Cross-species+comparison+of+orthologous+gene+expression+in+human+bladder+cancer+and+carcinogen-induced+rodent+models.">Cross-species comparison of orthologous gene expression in human bladder cancer and carcinogen-induced rodent models.</a> Am J Transl Res. 3, 8-27 (2010).</li><li>Gong, Z., 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=Establishment+of+a+Novel+Bladder+Cancer+Xenograft+Model+in+Humanized+Immunodeficient+Mice.">Establishment of a Novel Bladder Cancer Xenograft Model in Humanized Immunodeficient Mice.</a> Cellular physiology and biochemistry : international journal of experimental cellular physiology, biochemistry, and pharmacology. 37, 1355-1368 (2015).</li></ol>

The authors have nothing to disclose.

Le fasi più critiche nel protocollo sono 1) mantenere correttamente la tumorigenicità della linea cellulare; 2) garantire la secrezione di PSA misurabile prima dell&#39;impianto delle cellule tumorali nei topi; 3) generare una cella singola sospensione per l&#39;impianto in modo da ridurre la variazione della dimensione del tumore; e 4) instillare cellule a bassa velocità per evitare vescico-ureterale reflusso, con conseguente impianto di cellule tumorali nel rene. Dopo passaggio prolunga...

L&#39;obiettivo di questo metodo è quello di generare tumori della vescica murino ortotopiche e di monitorare i tumori impiantati con la massima precisione possibile, in modo che i topi senza l&#39;impianto del tumore non è pensato per essere trattato ad analisi end-point. In generale, il metodo mostrato ridurrà la necessità di un gran numero di topi per analisi sperimentale e garantire una maggiore precisione nel determinare risultati terapeutici. Lo sviluppo di un modello ortotopico per il cancro è importante, in quanto le cellule tumorali impiantare sottocute non ricapitolano l&#39;ambiente della malattia clinica o consentire lo sviluppo di strategie terapeutiche. L&#39;architettura della vescica permette l&#39;instillazione di terapie del cancro della vescica direttamente nella vescica con effetti sistemici minimi. Così, i modelli animali che ricapitolano questo ambiente, come un modello ortotopico, sono importanti per valutare nuove terapie. Le conclusioni tratte da qualsiasi set-up sperimentale sono dependent sulle limitazioni del modello. Numerose tecniche sono state sviluppate per la produzione di tumori della vescica ortotopico nei topi. Questi si affidano danneggiare lo strato glicosaminoglicano della vescica, consentendo cellule tumorali da impiantare. Le tecniche utilizzate comprendono elettrocauterizzazione, che si traduce in un unico punto di danno nella parete della vescica, con conseguente sviluppo del tumore in un sito nella vescica 1,2. Tuttavia, il tasso di successo di impianto tumore, utilizzando elettrocauterizzazione è operatore-dipendente variabili da 10 - 90%, e comprende il pericolo che la parete della vescica viene perforato, portando a sviluppare tumori nella cavità peritoneale. Cauterizzazione chimica viene eseguita utilizzando nitrato d&#39;argento, che danneggia la parete della vescica 3. Analogamente, l&#39;acido è stato usato per danneggiare la parete della vescica 4. Tripsina è stato utilizzato anche per danneggiare la vescica e 5. Questi metodi possono provocare lo sviluppo di più di un tumore nella vescica.Inoltre, vi è il rischio di gravi danni alla vescica se le sostanze chimiche vengono lasciati a contatto con la parete della vescica per troppo tempo. Il metodo sviluppato da Ninalga et al. utilizza il poli-L-lisina carica positiva (PLL) 6 molecole per rivestire la parete della vescica; Questo permette alle cellule tumorali carica negativa ad attaccarsi al livello glicosaminoglicano della vescica. Questo metodo comporta generalmente più di un tumore sviluppare nella vescica, ma tumorale impianto è a 80 - 100% 4,7. Tecnicamente, è anche la procedura più semplice da eseguire. Per garantire che i tumori che si sviluppano sono abbastanza anche in dimensioni, è importante che le cellule tumorali non vengono raggruppati in grandi ciuffi prima dell&#39;impianto. Per valutare l&#39;efficacia terapeutica, è meglio effettuare questo studio su topi con tumori abbastanza di dimensioni simili. Così, un buon sistema di rilevamento che possono quantificare le dimensioni del tumore subito dopo l&#39;impianto è importante. Diverse strategie sono apen usato per valutare i tumori. Questi includono la risonanza magnetica (MRI) 8-10, fluorescenza 11, bioluminescenza 12,13, ultrasuoni 14, e il dosaggio di immunoassorbimento enzimatico (ELISA) 15,16. Mentre MRI e ultrasuoni non richiedono modifiche delle cellule tumorali, vi è la necessità di attrezzature e contrasto sensibili agenti per MRI. I saggi fluorescence-, luminescence-, e basati su ELISA richiedono modifiche delle cellule tumorali per esprimere proteine ​​marker che possono essere rilevati da questi metodi. Per luminescenza, un substrato è necessaria per la rilevazione dell&#39;attività di luciferasi; vi è quindi un passo aggiunto e aumento dei costi. Sia luminescenza e fluorescenza richiedono attrezzature specializzate. Per produrre fluorescenza, proteina fluorescente verde (GFP) ciclizzazione, che viene catalizzata da ossigeno molecolare, è necessaria. Così, l&#39;espressione della GFP può essere variabile all&#39;interno di una massa tumorale seconda accesso ad ossigeno, rendendo questo un indicatore piuttosto affidabile <sup&gt; 17. La modifica della linea di cellule murine cancro alla vescica MB49 a secernere prostatico umano Specific Antigen (PSA) 15,16 come marker surrogato è un&#39;altra strategia. Questi marcatori forniscono anche un mezzo alternativo di conferma presenza del tumore al termine dell&#39;esperimento, rendendoli alternativa alla immunoistochimica. Questo studio riporta il metodo PLL di impianto del tumore ortotopico e presenta un confronto tra sistemi di rilevamento del tumore, cioè ELISA, la fluorescenza, e imaging ad ultrasuoni.

<table border="0" cellpadding="0" cellspacing="0" width="893">
	<tbody>
		<tr height="17">
			<td height="17" style="height:17px;width:404px;">MB49-PSA cells</td>
			<td style="width:188px;">N/A</td>
			<td style="width:188px;">N/A</td>
			<td style="width:113px;">ref (Wu QH, 2004)</td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">RPMI 1640 media</td>
			<td>HyClone</td>
			<td>SH30027.01&#160;</td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Dulbecco&#39;s Modified Eagle&#39;s Medium (DMEM) media</td>
			<td>Biowest</td>
			<td>L0102</td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Fetal Bovine Serum (FBS) South American</td>
			<td>Biowest</td>
			<td>S1810</td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Fetal Bovine Serum (FBS) South American, Premium</td>
			<td>Biowest</td>
			<td>S181B</td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Fetal Bovine Serum (FBS)</td>
			<td>HyClone</td>
			<td>SH30088.03&#160;</td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">L-glutamine</td>
			<td>Biowest</td>
			<td>X0550</td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Penicillin-Streptomycin</td>
			<td>Biowest</td>
			<td>L0022</td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Hygromycin B</td>
			<td>Invitrogen</td>
			<td>10687-010</td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">free PSA (Human) ELISA kit</td>
			<td>Abnova</td>
			<td>KA0209</td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">TRIzol Reagent for RNA extraction&#160;</td>
			<td>Ambion</td>
			<td>15596026</td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">High Capacity cDNA Reverse Transcription Kit with RNase Inhibitor</td>
			<td>Applied Biosystems</td>
			<td>4374967</td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">TaqMan Universal PCR Master Mix</td>
			<td>Applied Biosystems</td>
			<td>4304437</td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">TaqMan Gene Expression Assay &#8211; Mouse Actb</td>
			<td>Applied Biosystems</td>
			<td>4331182</td>
			<td>Mm00607939_s1</td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">TaqMan Gene Expression Assay &#8211; Human KLK3</td>
			<td>Applied Biosystems</td>
			<td>4331182</td>
			<td>Hs00426859_g1</td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">C57BL/6J female mice</td>
			<td>In Vivos</td>
			<td></td>
			<td>4-6 wk old</td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Anesthesia (75mg/kg Ketamine and 1mg/kg Medetomidine)</td>
			<td>Local pharmacy</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Reversal drug (1mg/kg Atipamezole)</td>
			<td>Local pharmacy</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Ear punch</td>
			<td>Electron Microscopy Sciences</td>
			<td>72893-01</td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Hartmann&#39;s solution or Compound sodium lactate</td>
			<td>B Braun</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Ophthalmic ointment - Duratears sterile ocular lubricant ointment</td>
			<td>Alcon</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Heat pack - HotHands handwarmers</td>
			<td>Heatmax Inc</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Introcan Certo IV catheter</td>
			<td>B Braun</td>
			<td>4251300</td>
			<td>24G x 3/4&#8243;</td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Aquagel Lubricating jelly</td>
			<td>Local pharmacy</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">&#160;Poly-L-lysine solution, 0.01%,</td>
			<td>Sigma</td>
			<td>P4707</td>
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			<td height="17" style="height:17px;">cOmplete, Mini, EDTA-free Protease Inhibitor Cocktail</td>
			<td>Roche</td>
			<td>4693159001</td>
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			<td height="17" style="height:17px;">Quantichrom Creatinine Assay Kit</td>
			<td>BioAssay Systems</td>
			<td>DICT-50&#160;</td>
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		<tr height="17">
			<td height="17" style="height:17px;">Fluorescent dye - VivoTrack 680</td>
			<td>Perkin Elmer</td>
			<td>NEV12000&#160;</td>
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		<tr height="17">
			<td height="17" style="height:17px;">RNAlater-ICE Frozen Tissue Transition Solution</td>
			<td>Ambion</td>
			<td>4427575</td>
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		<tr height="17">
			<td height="17" style="height:17px;">Name</td>
			<td>Company</td>
			<td>Catalog number</td>
			<td>Comments</td>
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			<td height="17" style="height:17px;">Equipment and Software</td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">7500 Realtime PCR System</td>
			<td>Applied Biosystems</td>
			<td></td>
			<td></td>
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		<tr height="17">
			<td height="17" style="height:17px;">7500 Software v2.3</td>
			<td>Applied Biosystems</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Metabolic Cage</td>
			<td>Tecniplast&#160;</td>
			<td>Vertical type rack for 12 cages</td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">BD FACSCanto I system&#160;</td>
			<td>BD Biosciences</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">BD FACSDiva software v7</td>
			<td>BD Biosciences</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">IVIS SpectrumCT in vivo imaging system&#160;</td>
			<td>Caliper Life Sciences&#160;</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Living Image Software v3.1</td>
			<td>Caliper Life Sciences&#160;</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Vevo 2100 imaging system&#160;</td>
			<td>VisualSonics&#160;</td>
			<td></td>
			<td></td>
		</tr>
	</tbody>
</table>

a murine orthotopic bladder tumor model and tumor detection system

Questo protocollo descrive la generazione di tumori della vescica in topi C57BL / 6J femmina utilizzando la linea cellulare di cancro alla vescica murino MB49, che è stato modificato a secernere prostatico umano specifico (PSA), e la procedura per la conferma di impianto del tumore. In breve, i topi vengono anestetizzati con farmaci iniettabili e sono fatti per porre in posizione di dorsale. L&#39;urina è liberata dalla vescica e 50 ml di poli-L-lisina (PLL) viene lentamente instillato ad una velocità di 10 microlitri / 20 s utilizzando un catetere 24 G IV. Si lascia in vescica per 20 min in tappatura catetere. Il catetere viene rimosso e PLL è lasciata libera entro una leggera pressione sulla vescica. Questa è seguita da instillazione della linea cellulare di cancro alla vescica murino (1 x 10 5 cellule / 50 mL) ad una velocità di 10 ml / 20 s. Il catetere viene tappo per evitare evacuazione prematura. Dopo 1 h, i topi sono fatti rivivere con un farmaco inversione, e la vescica è liberate. Il tasso di instillazione lento è importante,poiché riduce il reflusso vescico-ureterale, che può causare tumori a verificarsi nel tratto urinario superiore e nei reni. La linea cellulare dovrebbe essere ben risospeso per ridurre aggregazione di cellule, come questo può portare a dimensioni tumorali irregolari dopo l&#39;impianto. Questa tecnica induce tumori con elevata efficienza. La crescita del tumore è monitorato da urinario secrezione di PSA. monitoraggio marcatore PSA è più affidabile di ultrasuoni o la fluorescenza per la rilevazione della presenza di tumori nella vescica. I tumori nei topi generalmente raggiungono una dimensione massima che influisce negativamente la salute di circa 3 - 4 settimane, se non trattata. Monitorando la crescita tumorale, è possibile differenziare topi che sono stati curati da quelli che non sono stati impiantati con successo con tumori. Con solo l&#39;analisi end-point, quest&#39;ultimo può essere erroneamente assume che sono stati curati con la terapia.

secrezione di PSA da cellule MB49 è risultata variare con i mezzi di crescita. MB49-PSA viene coltivato in DMEM media, perché questo si traduce in un aumento della secrezione del PSA (Figura 1A). Per determinare la sensibilità del PSA ELISA e PCR in tempo reale, diverso numero di MB49-PSA-secernenti cellule sono state mescolate con cellule parentali MB49. PSA ELISA rileva un minimo di 1 x 10 5 cellule secernenti PSA / 1 x 10 6 cellule (Fi...

Watch this Scientific Journal Video about A Murine Orthotopic Bladder Tumor Model and Tumor Detection System at JoVE.com

A Murine Orthotopic Bladder Tumor Model and Tumor Detection System

Questo protocollo descrive la generazione di tumori della vescica ortotopico murini in femmine C57BL 6J e il monitoraggio della crescita tumorale /.

Un tumore modello murino ortotopico della vescica e del tumore Detection System

This protocol describes the generation of bladder tumors in female C57BL/6J mice using the murine bladder cancer cell line MB49, which has been modified ...

a-murine-orthotopic-bladder-tumor-model-and-tumor-detection-system

Research

JoVE Journal

Cancer Research

14.5K Views.  National University of Singapore, National University Health System.  Questo protocollo descrive la generazione di tumori della vescica ortotopico murini in femmine C57BL 6J e il monitoraggio della crescita tumorale /. 

Video: A Murine Orthotopic Bladder Tumor Model and Tumor Detection System

Murine Experimental Model of Original Tumor Development and Peritoneal Metastasis via Orthotopic Inoculation with Ovarian Carcinoma Cells

Epithelial ovarian carcinoma (EOC) is associated with a poor prognosis because it shows peritoneal dissemination. To improve the prognosis, it is important to control peritoneal dissemination. However, it is still unclear how tumor cells detach from primary lesions and attach to the mesothelium. The establishment of an appropriate animal model is needed to gain an understanding of the mechanism of peritoneal dissemination in vivo. In the current study, we introduce the process from the local injection of EOC cells into the murine ovarian surface to the development of metastasis, including the peritoneum and distant organs. Female nude mice (BALB/c nu/nu) at 8 weeks of age were used. Under a microscopic field of view, EOC cells (1 x 105 cells/&#181;l of medium-extracellular matrix (ECM)-based hydrogel/unilateral ovary/mouse) were injected into murine ovaries through a retroperitoneal approach from the dorsal flank. This proposed method is a less invasive procedure for the mouse and minimizes damage to the ovary. Here, we describe the methodological steps in the development of the original and metastatic tumor formation of EOC.

Murine Experimental Model of Original Tumor Development and Peritoneal Metastasis via Orthotopic Inoculation with Ovarian Carcinoma Cells

To clarify the multistep process of peritoneal dissemination of ovarian carcinoma, the current study presents a murine experimental model of original tumor development and peritoneal metastasis via orthotopic inoculation with these tumor cells.

Modello murino sperimentale di sviluppo del tumore originale e peritoneale Metastasi<em&gt; via</em&gt; Ortotopico inoculazione con cellule dell&#39;ovaio Carcinoma

Epithelial ovarian carcinoma (EOC) is associated with a poor prognosis because it shows peritoneal dissemination. To improve the prognosis, it is ...

Ricerca

Ricerca sul cancro

A Mouse Model of Fatigue Induced by Peripheral Irradiation

Cancer-related fatigue (CRF) is a distressing and costly condition that often affects patients receiving cancer treatments, including radiation therapy. Here we describe a method using targeted peripheral irradiation to induce fatigue-like behavior in mice. With appropriate shielding, the irradiation targets the lower abdominal/pelvic region of the mouse, sparing the brain, in an effort to model radiation treatment received by individuals with pelvic cancers. We deliver an irradiation dose that is sufficient to induce fatigue-like behavior in mice, measured by voluntary wheel-running activity (VWRA), without causing obvious morbidity. Since wheel running is a normal, voluntary behavior in mice, its use should have little confounding effect on other behavioral tests or biological measures. Hence, wheel running can be used as a feasible outcome measure in understanding the behavioral and biological correlates of fatigue. CRF is a complex condition with frequent comorbidities, and likely has causes related both to cancer and its various treatments. The methods described in this paper are useful for investigating radiation-induced changes that contribute to the development of CRF and, more generally, to explore the biological networks that can explain the development and persistence of a peripherally-triggered but centrally-driven behavior like fatigue.

We describe a method using targeted peripheral irradiation to induce fatigue-like behavior in mice. The selected non-lethal irradiation dose leads to a week-long reduction in voluntary wheel-running activity.

Un modello murino di fatica indotta da irradiazione Peripheral

Cancer-related fatigue (CRF) is a distressing and costly condition that often affects patients receiving cancer treatments, including radiation therapy. ...

Isolation of Circulating Tumor Cells in an Orthotopic Mouse Model of Colorectal Cancer

Despite the advantages of easy applicability and cost-effectiveness, subcutaneous mouse models have severe limitations and do not accurately simulate tumor biology and tumor cell dissemination. Orthotopic mouse models have been introduced to overcome these limitations; however, such models are technically demanding, especially in hollow organs such as the large bowel. In order to produce uniform tumors which reliably grow and metastasize, standardized techniques of tumor cell preparation and injection are critical. 
We have developed an orthotopic mouse model of colorectal cancer (CRC) which develops highly uniform tumors and can be used for tumor biology studies as well as therapeutic trials. Tumor cells from either primary tumors, 2-dimensional (2D) cell lines or 3-dimensional (3D) organoids are injected into the cecum and, depending on the metastatic potential of the injected tumor cells, form highly metastatic tumors. In addition, CTCs can be found regularly. We here describe the technique of tumor cell preparation from both 2D cell lines and 3D organoids as well as primary tumor tissue, the surgical and injection techniques as well as the isolation of CTCs from the tumor-bearing mice, and present tips for troubleshooting.

We describe the establishment of orthotopic colorectal tumors via injection of tumor cells or organoids into the cecum of mice and the subsequent isolation of circulating tumor cells (CTCs) from this model.

Isolamento delle cellule tumorali circolanti in un modello di topo ortotopico del tumore del colon-retto

Despite the advantages of easy applicability and cost-effectiveness, subcutaneous mouse models have severe limitations and do not accurately simulate ...

Tumor Engraftment in a Xenograft Mouse Model of Human Mantle Cell Lymphoma

B lymphocytes are key players in immune cell circulation and they mainly home to and reside in lymphoid organs. While normal B cells only proliferate when stimulated by T lymphocytes, oncogenic B cells survive and expand autonomously in undefined organ niches. Mantle cell lymphoma (MCL) is one such B cell disorder, where the median survival rate of patients is 4 - 5 years. This calls for the need of effective mechanisms by which the homing and engraftment of these cells are blocked in order to increase the survival and longevity of patients. Therefore, the effort to develop a xenograft mouse model to study the efficacy of MCL therapeutics by blocking the homing mechanism in vivo is of utmost importance. Development of animal recipients for human cell xenotransplantation to test early stage drugs have long been pursued, as relevant preclinical mouse models are crucial to screen new therapeutic agents. This animal model is developed to avoid human graft rejection and to establish a model for human diseases, and it may be an extremely useful tool to study disease progression of different lymphoma types and to perform preclinical testing of candidate drugs for hematologic malignancies, like MCL. We established a xenograft mouse model that will serve as an excellent resource to study and develop novel therapeutic approaches for MCL.

Mantle cell lymphoma (MCL) is a difficult to treat B cell disorder and it is equally difficult to establish a xenograft mouse model of primary MCL to study and develop therapeutics. Here, we describe the successful establishment of MCL xenografts in mice to help understand its underlying biology.

Attecchimento del tumore in un modello murino di xenotrapianto di umano linfoma a cellule mantellari

B lymphocytes are key players in immune cell circulation and they mainly home to and reside in lymphoid organs. While normal B cells only proliferate when ...

Native Chromatin Immunoprecipitation Using Murine Brain Tumor Neurospheres

Epigenetic modifications may be involved in the development and progression of glioma. Changes in methylation and acetylation of promoters and regulatory regions of oncogenes and tumor suppressors can lead to changes in gene expression and play an important role in the pathogenesis of brain tumors. Native chromatin immunoprecipitation (ChIP) is a popular technique that allows the detection of modifications or other proteins tightly bound to DNA. In contrast to cross-linked ChIP, in native ChIP, cells are not treated with formaldehyde to covalently link protein to DNA. This is advantageous because sometimes crosslinking may fix proteins that only transiently interact with DNA and do not have functional significance in gene regulation. In addition, antibodies are generally raised against unfixed peptides. Therefore, antibody specificity is increased in native ChIP. However, it is important to keep in mind that native ChIP is only applicable to study histones or other proteins that bind tightly to DNA. This protocol describes the native chromatin immunoprecipitation on murine brain tumor neurospheres.

Epigenetic mechanisms are frequently altered in glioma. Chromatin immunoprecipitation could be used to study the consequences of genetic alterations in glioma that result from changes in histone modifications which regulate chromatin structure and gene transcription. This protocol describes native chromatin immunoprecipitation on murine brain tumor neurospheres.

Immunoprecipitazione della cromatina nativo utilizzando neurosfere tumore del cervello murino

Epigenetic modifications may be involved in the development and progression of glioma. Changes in methylation and acetylation of promoters and regulatory ...

A Bioluminescent and Fluorescent Orthotopic Syngeneic Murine Model of Androgen-dependent and Castration-resistant Prostate Cancer

Orthotopic tumor modeling is a valuable tool for pre-clinical prostate cancer research, as it has multiple advantages over both subcutaneous and transgenic genetically engineered mouse models. Unlike subcutaneous tumors, orthotopic tumors contain more clinically accurate vasculature, tumor microenvironment, and responses to multiple therapies. In contrast to genetically engineered mouse models, orthotopic models can be performed with lower cost and in less time, involve the use of highly complex and heterogeneous mouse or human cancer cell lines, rather that single genetic alterations, and these cell lines can be genetically modified, such as to express imaging agents. Here, we present a protocol to surgically injecting a luciferase- and mCherry-expressing murine prostate cancer cell line into the anterior prostate lobe of mice. These mice developed orthotopic tumors that were non-invasively monitored in vivo and further analyzed for tumor volume, weight, mouse survival, and immune infiltration. Further, orthotopic tumor-bearing mice were surgically castrated, leading to immediate tumor regression and subsequent recurrence, representing castration-resistant prostate cancer. Although technical skill is required to carry out this procedure, this syngeneic orthotopic model of both androgen-dependent and castration-resistant prostate cancer is of great use to all investigators in the field.

The goal of this protocol is to demonstrate the intra-prostatic injection of prostate cancer cells, with subsequent castration. Orthotopic pre-clinical models of androgen-dependent and castration-resistant prostate cancer are critical to study the disease in the context of a clinically relevant tumor microenvironment and an immunocompetent host.

Un modello murino Syngeneic Orthotopic bioluminescenti e fluorescente di carcinoma della prostata androgeno-dipendente e castrazione-resistente

Orthotopic tumor modeling is a valuable tool for pre-clinical prostate cancer research, as it has multiple advantages over both subcutaneous and ...

Digital Polymerase Chain Reaction Assay for the Genetic Variation in a Sporadic Familial Adenomatous Polyposis Patient Using the Chip-in-a-tube Format

The quantitative analysis of human genetic variation is crucial for understanding the molecular characteristics of serious medical conditions, such as tumors. Because digital polymerase chain reactions (PCR) enable the precise quantification of DNA copy number variants, they are becoming an essential tool for detecting rare genetic variations, such as drug-resistant mutations. It is expected that molecular diagnoses using digital PCR (dPCR) will be available in clinical practice in the near future; thus, how to efficiently conduct dPCR with human genetic material is a hot topic. Here, we introduce a method to detect Adenomatous polyposis coli (APC) somatic mosaicism using dPCR with the chip-in-a-tube format, which allows eight dPCR reactions to be simultaneously conducted. Care should be taken when filling and sealing the reaction mixture on the chips. This article demonstrates how to avoid the over- and underestimation of positive partitions. Furthermore, we present a simple procedure for collecting the dPCR product from the partitions on the chips, which can then be used to confirm the specific amplification. We hope that this methods report will help promote the dPCR with the chip-in-a-tube method in genetic research.

Digital polymerase chain reaction (PCR) is a useful tool for the high-sensitivity detection of single nucleotide variants and DNA copy number variants. Here, we demonstrate key considerations for measuring rare variants in the human genome using digital PCR with the chip-in-a-tube format.

Reazione a catena della polimerasi digitale per la variazione genetica in un paziente di poliposi adenomatosa familiare sporadica utilizzando il formato di Chip-in-a-tubo

The quantitative analysis of human genetic variation is crucial for understanding the molecular characteristics of serious medical conditions, such as ...

A Three-dimensional Thymic Culture System to Generate Murine Induced Pluripotent Stem Cell-derived Tumor Antigen-specific Thymic Emigrants

The inheritance of pre-rearranged T cell receptors (TCRs) and their epigenetic rejuvenation make induced pluripotent stem cell (iPSC)-derived T cells a promising source for adoptive T cell therapy (ACT). However, classical in vitro methods for producing regenerated T cells from iPSC result in either innate-like or terminally differentiated T cells, which are phenotypically and functionally distinct from na&#239;ve T cells. Recently, a novel three-dimensional (3D) thymic culture system was developed to generate a homogenous subset of CD8&#945;&#946;+ antigen-specific T cells with a na&#239;ve T cell-like functional phenotype, including the capacity for proliferation, memory formation, and tumor suppression in vivo. This protocol avoids aberrant developmental fates, allowing for the generation of clinically relevant iPSC-derived T cells, designated as iPSC-derived thymic emigrants (iTE), while also providing a potent tool to elucidate the subsequent functions necessary for T cell maturation after thymic selection.

This article describes a novel method to generate tumor antigen-specific induced pluripotent stem cell-derived thymic emigrants (iTE) by a three-dimensional (3D) thymic culture system. iTE are a homogenous subset of T cells closely related to na&#239;ve T cells with the capacity for proliferation, memory formation, and tumor suppression.

Un sistema di coltura timica tridimensionale per generare emigrati timici derivati da murine

The inheritance of pre-rearranged T cell receptors (TCRs) and their epigenetic rejuvenation make induced pluripotent stem cell (iPSC)-derived T cells a ...

Patient-derived Orthotopic Xenograft Models for Human Urothelial Cell Carcinoma and Colorectal Cancer Tumor Growth and Spontaneous Metastasis

Cancer patients have poor prognoses when lymph node (LN) involvement is present in both high-grade urothelial cell carcinoma (HG-UCC) of the bladder and colorectal cancer (CRC). More than 50% of patients with muscle-invasive UCC, despite curative therapy for clinically-localized disease, will develop metastases and die within 5 years, and metastatic CRC is a leading cause of cancer-related deaths in the US. Xenograft models that consistently mimic UCC and CRC metastasis seen in patients are needed. This study aims to generate patient-derived orthotopic xenograft (PDOX) models of UCC and CRC for primary tumor growth and spontaneous metastases under the influence of LN stromal cells mimicking the progression of human metastatic diseases for drug screening. Fresh UCC and CRC tumors were obtained from consented patients undergoing resection for HG-UCC and colorectal adenocarcinoma, respectively. Co-inoculated with LN stromal cell (LNSC) analog HK cells, luciferase-tagged UCC cells were intra-vesically (IB) instilled into female non-obese diabetic/severe combined immunodeficiency (NOD/SCID) mice, and CRC cells were intra-rectally (IR) injected into male NOD/SCID mice. Tumor growth and metastasis were monitored weekly using bioluminescence imaging (BLI). Upon sacrifice, primary tumors and mouse organs were harvested, weighed, and formalin-fixed for Hematoxylin and Eosin and immunohistochemistry staining. In our unique PDOX models, xenograft tumors resemble patient pre-implantation tumors. In the presence of HK cells, both models have high tumor implantation rates measured by BLI and tumor weights, 83.3% for UCC and 96.9% for CRC, and high distant organ metastasis rates (33.3% detected liver or lung metastasis for UCC and 53.1% for CRC). In addition, both models have zero mortality from the procedure. We have established unique, reproducible PDOX models for human HG-UCC and CRC, which allow for tumor formation, growth, and metastasis studies. With these models, testing of novel therapeutic drugs can be performed efficiently and in a clinically-mimetic manner.

This protocol describes the generation of patient-derived orthotopic xenograft models by intra-vesically instilling high-grade urothelial cell carcinoma cells or intra-rectally injecting colorectal cancer cells into non-obese diabetic/severe combined immunodeficiency (NOD/SCID) mice for primary tumor growth and spontaneous metastases under the influence of lymph node stromal cells, which mimics the progression of human metastatic diseases.

Modelli di Xenotrapianto ortotopico derivati dal paziente per carcinoma a cellule uroteliali umane e crescita del tumore del tumore colorettale e metastasi spontanea

Cancer patients have poor prognoses when lymph node (LN) involvement is present in both high-grade urothelial cell carcinoma (HG-UCC) of the bladder and ...

Detection and Monitoring of Tumor Associated Circulating DNA in Patient Biofluids

Complications associated with upfront and repeat surgical tissue sampling present the need for minimally invasive platforms capable of molecular sub-classification and temporal monitoring of tumor response to therapy. Here, we describe our dPCR-based method for the detection of tumor somatic mutations in cell free DNA (cfDNA), readily available in&#160;patient biofluids. Although limited in the number of mutations that can be tested for in each assay, this method provides a high level of sensitivity and specificity. Monitoring of mutation abundance, as calculated by MAF, allows for the evaluation of tumor response to therapy, thereby providing a much-needed supplement to radiographic imaging.

Here, we present a protocol to detect tumor somatic mutations in circulating DNA present in patient biological fluids (biofluids). Our droplet digital polymerase chain reaction (dPCR)-based method enables quantification of the tumor mutation allelic frequency (MAF), facilitating a minimally invasive complement to diagnosis and temporal monitoring of tumor response.