Name: a human glioblastoma organotypic slice culture model for study of tumor cell migration and patient-specific effects of anti-invasive drugs
Uploaded: 2017-07-20T12:30:00
Description: Watch this Scientific Journal Video about A Human Glioblastoma Organotypic Slice Culture Model for Study of Tumor Cell Migration and Patient-specific Effects of Anti-Invasive Drugs at JoVE.com

We would like to thank Dr. Lee Niswander and Dr. Rada Massarwa for their technical expertise and contributions to the slice culture confocal imaging protocol described here. Further thanks to Dr. Kalen Dionne who provided expertise regarding optimizing brain tumor tissue slicing and culture parameters.

Before collection of patient tissue samples is initiated, informed consent must be obtained from each patient under an approved Institutional Review Board (IRB) protocol. The authors of this protocol received consent for the work described under approved IRB protocols at the University of Colorado Hospital and Inova Fairfax Hospital. Data collected from these slice cultures were not used to direct patient care decisions.
1. Pre-slicing Preparation
<ol>
	<li>Prepare &#34;tissue processing&#34...

<ol>
	<li>Beadle, 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=The+role+of+myosin+II+in+glioma+invasion+of+the+brain.">The role of myosin II in glioma invasion of the brain.</a> Mol Biol Cell. 19, 3357-3368 (2008).</li><li>Farin, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Transplanted+glioma+cells+migrate+and+proliferate+on+host+brain+vasculature:+a+dynamic+analysis.">Transplanted glioma cells migrate and proliferate on host brain vasculature: a dynamic analysis.</a> Glia. 53, 799-808 (2006).</li><li>Panopoulos, A., Howell, M., Fotedar, R., Margolis, R. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Glioblastoma+motility+occurs+in+the+absence+of+actin+polymer.">Glioblastoma motility occurs in the absence of actin polymer.</a> Mol Biol Cell. 22, 2212-2220 (2011).</li><li>Ivkovic, 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=Direct+inhibition+of+myosin+II+effectively+blocks+glioma+invasion+in+the+presence+of+multiple+motogens.">Direct inhibition of myosin II effectively blocks glioma invasion in the presence of multiple motogens.</a> Mol Biol Cell. 23, 533-542 (2012).</li><li>Assanah, 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=Glial+progenitors+in+adult+white+matter+are+driven+to+form+malignant+gliomas+by+platelet-derived+growth+factor-expressing+retroviruses.">Glial progenitors in adult white matter are driven to form malignant gliomas by platelet-derived growth factor-expressing retroviruses.</a> J Neurosci. 26, 6781-6790 (2006).</li><li>Chaichana, K. L., 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=Preservation+of+glial+cytoarchitecture+from+ex+vivo+human+tumor+and+non-tumor+cerebral+cortical+explants:+A+human+model+to+study+neurological+diseases.">Preservation of glial cytoarchitecture from ex vivo human tumor and non-tumor cerebral cortical explants: A human model to study neurological diseases.</a> J Neurosci Methods. 164, 261-270 (2007).</li><li>Grube, 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=Overexpression+of+fatty+acid+synthase+in+human+gliomas+correlates+with+the+WHO+tumor+grade+and+inhibition+with+Orlistat+reduces+cell+viability+and+triggers+apoptosis.">Overexpression of fatty acid synthase in human gliomas correlates with the WHO tumor grade and inhibition with Orlistat reduces cell viability and triggers apoptosis.</a> J Neurooncol. 118, 277-287 (2014).</li><li>Hovinga, K. 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=Inhibition+of+notch+signaling+in+glioblastoma+targets+cancer+stem+cells+via+an+endothelial+cell+intermediate.">Inhibition of notch signaling in glioblastoma targets cancer stem cells via an endothelial cell intermediate.</a> Stem Cells. 28, 1019-1029 (2010).</li><li>Merz, F., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Organotypic+slice+cultures+of+human+glioblastoma+reveal+different+susceptibilities+to+treatments.">Organotypic slice cultures of human glioblastoma reveal different susceptibilities to treatments.</a> Neurooncol. 15, 670-681 (2013).</li><li>Xu, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Vorinostat+modulates+cell+cycle+regulatory+proteins+in+glioma+cells+and+human+glioma+slice+cultures.">Vorinostat modulates cell cycle regulatory proteins in glioma cells and human glioma slice cultures.</a> J Neurooncol. 105, 241-251 (2011).</li><li>Verhaak, R. G., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Integrated+genomic+analysis+identifies+clinically+relevant+subtypes+of+glioblastoma+characterized+by+abnormalities.">Integrated genomic analysis identifies clinically relevant subtypes of glioblastoma characterized by abnormalities.</a> in PDGFRA, IDH1, EGFR, and NF1. Cancer cell. 17, 98-110 (2010).</li><li>Gill, B. J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=MRI-localized+biopsies+reveal+subtype-specific+differences+in+molecular+and+cellular+composition+at+the+margins+of+glioblastoma.">MRI-localized biopsies reveal subtype-specific differences in molecular and cellular composition at the margins of glioblastoma.</a> Proc Natl Acad Sci USA. 111, 12550-12555 (2014).</li><li>Snuderl, 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=Mosaic+amplification+of+multiple+receptor+tyrosine+kinase+genes+in+glioblastoma.">Mosaic amplification of multiple receptor tyrosine kinase genes in glioblastoma.</a> Cancer cell. 20, 810-817 (2011).</li><li>Kakita, A., Goldman, J. E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Patterns+and+dynamics+of+SVZ+cell+migration+in+the+postnatal+forebrain:+monitoring+living+progenitors+in+slice+preparations.">Patterns and dynamics of SVZ cell migration in the postnatal forebrain: monitoring living progenitors in slice preparations.</a> Neuron. 23, 461-472 (1999).</li><li>Meijering, E., Dzyubachyk, O., Smal, I., van Cappellen, W. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Tracking+in+cell+and+developmental+biology.">Tracking in cell and developmental biology.</a> Sem Cell Dev Biol. 20, 894-902 (2009).</li><li>Parker, J. J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Gefitinib+selectively+inhibits+tumor+cell+migration+in+EGFR-amplified+human+glioblastoma.">Gefitinib selectively inhibits tumor cell migration in EGFR-amplified human glioblastoma.</a> Neurooncol. 15, 1048-1057 (2013).</li><li>Brat, D. J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Pseudopalisades+in+glioblastoma+are+hypoxic,+express+extracellular+matrix+proteases,+and+are+formed+by+an+actively+migrating+cell+population.">Pseudopalisades in glioblastoma are hypoxic, express extracellular matrix proteases, and are formed by an actively migrating cell population.</a> Cancer Res. 64, 920-927 (2004).</li><li>Shweiki, D., Itin, A., Soffer, D., Keshet, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Vascular+endothelial+growth+factor+induced+by+hypoxia+may+mediate+hypoxia-initiated+angiogenesis.">Vascular endothelial growth factor induced by hypoxia may mediate hypoxia-initiated angiogenesis.</a> Nature. 359, 843-845 (1992).</li><li>Shamir, E. R., Ewald, A. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Three-dimensional+organotypic+culture:+experimental+models+of+mammalian+biology+and+disease.">Three-dimensional organotypic culture: experimental models of mammalian biology and disease.</a> Nat Rev Mol Cell Biol. 15, 647-664 (2014).</li><li>Charles, N. A., Holland, E. C., Gilbertson, R., Glass, R., Kettenmann, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+brain+tumor+microenvironment.">The brain tumor microenvironment.</a> Glia. 60, 502-514 (2012).</li><li>Di Cristofori, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+vacuolar+H++ATPase+is+a+novel+therapeutic+target+for+glioblastoma.">The vacuolar H+ ATPase is a novel therapeutic target for glioblastoma.</a> Oncotarget. 6, 17514-17513 (2015).</li><li>Vaira, V., 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=Preclinical+model+of+organotypic+culture+for+pharmacodynamic+profiling+of+human+tumors.">Preclinical model of organotypic culture for pharmacodynamic profiling of human tumors.</a> Proc Natl Acad Sci USA. , 8352-8356 (2010).</li><li>Gerlach, M. 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=Slice+cultures+from+head+and+neck+squamous+cell+carcinoma:+a+novel+test+system+for+drug+susceptibility+and+mechanisms+of+resistance.">Slice cultures from head and neck squamous cell carcinoma: a novel test system for drug susceptibility and mechanisms of resistance.</a> Br J Cancer. 110, 479-488 (2014).</li><li>Holliday, D. L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+practicalities+of+using+tissue+slices+as+preclinical+organotypic+breast+cancer+models.">The practicalities of using tissue slices as preclinical organotypic breast cancer models.</a> J Clin Pathol. 66, 253-255 (2013).</li><li>Maund, S. L., Nolley, R., Peehl, D. 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Organotypic slice cultures from human cancer tissue provide an attractive and underutilized platform for pre-clinical translational experimentation. Understanding of population-level behaviors of tumor cells with regards to migration, proliferation, and cell death in the native tumor microenvironment is lacking. Critically, studying tumor response to therapy in a dynamic, time-resolved fashion at the level of cell behavior may shed light on novel mechanisms of treatment resistance. Human tumor slice cultures provide a li...

The laboratory study of glioblastoma (GBM), is hindered by a lack of models that faithfully recapitulate the requisite pathologic characteristics of the human disease, namely tumor cell migration and invasion. Comparative studies of 2D and 3D in vitro invasion assays as well as 3D rodent slice culture models have uncovered mechanistically disparate cellular migration programs in these two contexts, potentially limiting the translatability of findings from 2D systems to the human disease1,2,3. The organotypic tumor slice culture and imaging paradigm described here allows for the study of tumor cell migration within slices of ex vivo human tumor tissue obtained from surgical resection. Thus, slice cultures of surgically resected tumor tissue in conjunction with time-lapse confocal microscopy provide a platform to study tumor cell migration in the native microenvironment without tissue dissolution or culture passaging.
There is extensive literature employing rodent brain slice culture models of GBM generated from human tumor xenografts, retroviral-induced tumors, and cellular overlays to study tumor invasion1,2,3,4,5. Recently, several groups have described the generation of organotypic slice cultures directly from human GBM tissue6,7,8,9,10. However, there is marked variation among published protocols with regards to slicing technique and culture media. Further, the use of organotypic slice cultures has focused on static experimental endpoints that have included changes in cell signaling, proliferation, and death. The protocol described herein expands upon prior slice culture paradigms by incorporating time-resolved observation of dynamic tumor cell behaviors through time-lapse laser scanning confocal microscopy. Recent discovery of inter11 and intratumoral12,13 genetic variation in human GBM underlines the importance of linking this heterogeneity with tumor cell behaviors and its implications on tumor response to therapy. Here, we report a streamlined and reproducible protocol for use of direct slice cultures from a human cancer tissue to visualize tumor cell migration in near real-time.

<table fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>DMEM High Glucose&#160;</td>
			<td>Invitrogen (Gibco)</td>
			<td>11960-044</td>
			<td></td>
		</tr>
		<tr>
			<td>Neurobasal-A Medium, minus phenol red</td>
			<td>Invitrogen (Gibco)</td>
			<td>12349-015</td>
			<td></td>
		</tr>
		<tr>
			<td>B-27 Supplement (50X), serum free</td>
			<td>Invitrogen (Gibco)</td>
			<td>17504-044</td>
			<td></td>
		</tr>
		<tr>
			<td>Penicillin-Streptomycin (10,000 U/mL)</td>
			<td>Invitrogen (Gibco)</td>
			<td>15140-122</td>
			<td></td>
		</tr>
		<tr>
			<td>GlutaMAX Supplement</td>
			<td>Invitrogen (Gibco)</td>
			<td>35050-061</td>
			<td></td>
		</tr>
		<tr>
			<td>L-Glutamine (200 mM)</td>
			<td>Invitrogen (Gibco)</td>
			<td>25030-081</td>
			<td></td>
		</tr>
		<tr>
			<td>HEPES (1 M)</td>
			<td>Invitrogen (Gibco)</td>
			<td>15630-080</td>
			<td></td>
		</tr>
		<tr>
			<td>Nystatin Suspension</td>
			<td>Sigma-Aldrich</td>
			<td>N1638-20ML</td>
			<td>10,000 unit/mL in DPBS, aseptically processed, BioReagent, suitable for cell culture</td>
		</tr>
		<tr>
			<td>UltraPure Low Melting Point Agarose</td>
			<td>Invitrogen (Gibco)</td>
			<td>16520-050</td>
			<td>Melts at 65.5 C, Remains fluid at 37 C, and sets rapidly below 25 C.</td>
		</tr>
		<tr>
			<td>Isolectin GS-IB4 from Griffonia simplicifolia, Alexa Fluor 647 Conjugate</td>
			<td>Thermo Fisher (Molecular Probes)</td>
			<td>I32450</td>
			<td>Used in media to label Microglia/Macrophages</td>
		</tr>
		<tr>
			<td>pRetroX-IRES-ZsGreen1 Vector</td>
			<td>Clonetech</td>
			<td>632520</td>
			<td></td>
		</tr>
		<tr>
			<td>Retro-X Concentrator&#160;</td>
			<td>Clonetech</td>
			<td>31455</td>
			<td>Binding resin for non-ultracentrifugation concentration of viral supernatants</td>
		</tr>
		<tr>
			<td>pVSG-G Vector</td>
			<td>Clonetech</td>
			<td>631530</td>
			<td>part of the Retro-X Universal Retroviral Expression System</td>
		</tr>
		<tr>
			<td>GP2-293 Viral packaging cells</td>
			<td>Clonetech</td>
			<td>631530</td>
			<td>part of the Retro-X Universal Retroviral Expression System</td>
		</tr>
		<tr>
			<td>Cyanoacrylate Glue (Super Glue)</td>
			<td>Sigma-Aldrich</td>
			<td>Z105899</td>
			<td>Medium-viscosity</td>
		</tr>
		<tr>
			<td></td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>Equipment</td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>Peel-A-Way Embedding Mold (Square - S22)</td>
			<td>Polysciences, Inc.</td>
			<td>18646A-1</td>
			<td>Molds for tumor sample embedding</td>
		</tr>
		<tr>
			<td>Stainless Steel Micro Spatulas</td>
			<td>Fisher Scientific</td>
			<td>S50823</td>
			<td>Bend instrument 45 degrees at the neck of the spoon blade</td>
		</tr>
		<tr>
			<td>Curved Fisherbrand Dissecting Fine-Pointed Forceps</td>
			<td>Fisher Scientific&#160;</td>
			<td>08-875</td>
			<td></td>
		</tr>
		<tr>
			<td>Single Edge Razor Blade (American Safety Razors)</td>
			<td>Fisher Scientific</td>
			<td>17-989-001</td>
			<td>Blade edge is 0.009&#34; thick. Crimped blunt-edge cover is removed before loading onto vibratome.</td>
		</tr>
		<tr>
			<td>Leica VT1000 S Vibratome</td>
			<td>Leica Biosystems</td>
			<td>VT1000 S</td>
			<td></td>
		</tr>
		<tr>
			<td>Hydrophilic PTFE cell culture insert&#160;</td>
			<td>EMD Millipore</td>
			<td>PICM0RG50</td>
			<td>30 mm, hydrophilic PTFE, 0.4 &#181;m pore size</td>
		</tr>
		<tr>
			<td>35 mm Glass Bottom Dishes&#160;</td>
			<td>MatTek</td>
			<td>P35G-1.5-20-C Sleeve</td>
			<td>20mm glass diameter. Coverslip glass thickness 1.5</td>
		</tr>
		<tr>
			<td>LSM 510 Confocal Micoscope</td>
			<td>Zeiss</td>
			<td>LSM 510</td>
			<td>10x Air Objective (c-Apochromat NA 0.45)</td>
		</tr>
		<tr>
			<td>PECON Stagetop Incubator</td>
			<td>PeCON Germany</td>
			<td>(Discontinued)</td>
			<td>Incubator PM 2000 RBT is a comprable product designed for use with Zeiss Microscopes.</td>
		</tr>
	</tbody>
</table>

a human glioblastoma organotypic slice culture model for study of tumor cell migration and patient-specific effects of anti-invasive drugs

Glioblastoma (GBM) continues to carry an extremely poor clinical prognosis despite surgical, chemotherapeutic, and radiation therapy. Progressive tumor invasion into surrounding brain parenchyma represents an enduring therapeutic challenge. To develop anti-migration therapies for GBM, model systems that provide a physiologically relevant background for controlled experimentation are essential. Here, we present a protocol for generating slice cultures from human GBM tissue obtained during surgical resection. These cultures allow for ex vivo experimentation without passaging through animal xenografts or single cell cultures. Further, we describe the use of time-lapse laser scanning confocal microscopy in conjunction with cell tracking to quantitatively study the migratory behavior of tumor cells and associated response to therapeutics. Slices are reproducibly generated within 90 min of surgical tissue acquisition. Retrovirally-mediated fluorescent cell labeling, confocal imaging, and tumor cell migration analyses are subsequently completed within two weeks of culture. We have successfully used these slice cultures to uncover genetic factors associated with increased migratory behavior in human GBM. Further, we have validated the model&#39;s ability to detect patient-specific variation in response to anti-migration therapies. Moving forward, human GBM slice cultures are an attractive platform for rapid ex vivo assessment of tumor sensitivity to therapeutic agents, in order to advance personalized neuro-oncologic therapy.

Our group has successfully generated slice cultures from over 50 patients undergoing initial GBM resection. This slice generation, culture, retroviral-labeling, imaging, and migration analysis protocol has been streamlined into a reproducible workflow (Figure 1). Critically, these organotypic GBM slices demonstrate concordance with originating tumor tissue throughout culture, including maintenance of pathologic hallmarks and microglia up to 15 days in culture (Fig...

Watch this Scientific Journal Video about A Human Glioblastoma Organotypic Slice Culture Model for Study of Tumor Cell Migration and Patient-specific Effects of Anti-Invasive Drugs at JoVE.com

A Human Glioblastoma Organotypic Slice Culture Model for Study of Tumor Cell Migration and Patient-specific Effects of Anti-Invasive Drugs

Current ex vivo models of glioblastoma (GBM) are not optimized for physiologically relevant study of human tumor invasion. Here, we present a protocol for generation and maintenance of organotypic slice cultures from fresh human GBM tissue. A description of time-lapse microscopy and quantitative cell migration analysis techniques is provided.

Glioblastoma (GBM) continues to carry an extremely poor clinical prognosis despite surgical, chemotherapeutic, and radiation therapy. Progressive tumor ...

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