Name: Auteur in de schijnwerpers: multimodale beeldvormingsstrategieën voor het optimaliseren van medicijnafgifte en vroege detectie bij de behandeling van glioblastoom
Uploaded: 2024-03-01T14:15:00
Description: Watch this Scientific Journal Video about Two-Photon Intravital Microscopy of Glioblastoma in a Murine Model at JoVE.com

We willen de Stanford Wu Tsai Neuroscience Microscopy Service, het Stanford Center for Innovations in In Vivo Imaging (SCi3) - centrum voor beeldvorming van kleine dieren, NIH S10 Shared Instrumentation Grant (S10RR026917-01, PI Michael Moseley, Ph.D.) en Stanford Preclinical Imaging Facility in Porter Drive bedanken voor het leveren van de apparatuur en infrastructuur voor dit project. Dit werk werd ondersteund door een subsidie van het National Institute for Child Health and Human Development, subsidienummer R01HD103638. We willen de Schnitzer Group, Stanford University, bedanken; het Zuo-lab, Universiteit van Santa Cruz; en het Neurovascular Imaging Laboratory, Boston Photonic Center, University of Boston, voor educatieve discussies over beeldvorming met twee fotonen en craniale raammodellen.

De in dit protocol beschreven dierproefprocedure is in overeenstemming met de eisen van het Administratief Panel Proefdierverzorging (APLAC).
1. Celkweek
<ol><li>Voorbereiding van de kap<ol><li>Handen wassen, handschoenen en een laboratoriumjas dragen. Schakel de biologische veiligheidskast in en stel de vleugel in op de juiste openingshoogte. Laat de afzuigkap 3-5 minuten ontluchten. Spuit de kap in met 70% ethanol en veeg deze af met tissuepapier.</li>
		<li>Spuit alle rea...

Real-time tracking van nanodeeltjes in hersentumoren met behulp van 2P-IVM bij muizen

<ol>
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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=Two-photon+microscopy+of+Paneth+cells+in+the+small+intestine+of+live+mice.">Two-photon microscopy of Paneth cells in the small intestine of live mice.</a> Sci Rep. 8 (1), 14174 (2018).</li><li>Ihler, F., Bertlich, M., Weiss, B., Dietzel, S., Canis, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Two-photon+microscopy+allows+imaging+and+characterization+of+cochlear+microvasculature+in+vivo.">Two-photon microscopy allows imaging and characterization of cochlear microvasculature in vivo.</a> Biomed Res Int. 2015, 154272 (2015).</li><li>Matsuura, 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=Intravital+imaging+with+two-photon+microscopy+reveals+cellular+dynamics+in+the+ischeamia-reperfused+rat+heart.">Intravital imaging with two-photon microscopy reveals cellular dynamics in the ischeamia-reperfused rat heart.</a> Sci Rep. 8 (1), 15991 (2018).</li><li>Veres, T. 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=Intubation-free+in+vivo+imaging+of+the+tracheal+mucosa+using+two-photon+microscopy.">Intubation-free in vivo imaging of the tracheal mucosa using two-photon microscopy.</a> Sci Rep. 7 (1), 694 (2017).</li><li>Zong, 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=Large-scale+two-photon+calcium+imaging+in+freely+moving+mice.">Large-scale two-photon calcium imaging in freely moving mice.</a> Cell. 185 (7), 1240-1256.e30 (2022).</li><li>Takasaki, K., Abbasi-Asl, R., Waters, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Superficial+bound+of+the+depth+limit+of+two-photon+imaging+in+mouse+brain.">Superficial bound of the depth limit of two-photon imaging in mouse brain.</a> eNeuro. 17 (1), (2019).</li><li>Birkner, A., Konnerth, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Deep+two-photon+imaging+in+vivo+with+a+red-shifted+calcium+indicator.">Deep two-photon imaging in vivo with a red-shifted calcium indicator.</a> Methods Mol Biol. 1929, 15-26 (1929).</li><li>Busche, M. 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We presenteren een methode voor real-time in vivo NP-tracking met behulp van 2P-IVM door een craniaal venster om de tumorafgifte van fluorescerend gelabelde ijzeroxide NP's te evalueren. De chirurgische techniek voor deze procedure vereist een vaste hand en geavanceerde experimentele chirurgische vaardigheden. Het is raadzaam om te oefenen met het gebruik van karkassen of fantomen voordat u verder gaat met het ervaren van levende dieren. Als alternatief implementeerden Hoeferlin et al. een robotboor om thermisch...

Twee-foton intravitale microscopie (2P-IVM) is een fluorescentiebeeldvormingstechniek die de visualisatie van levend weefsel mogelijkmaakt1.
2P-IVM werd voor het eerst ontwikkeld in de jaren 1990 en is gebruikt voor in vivo analyse van het netvlies2, nier3, dunne darm4, slakkenhuis5, hart6, luchtpijp7 en de hersenen in verschillende preklinische modellen 8,9. Op het gebied van neurowetenschappen heeft 2P-IVM aan belang gewonnen als techniek voor real-time beeldvorming van de gezonde hersenen bij wakkere dieren10, evenals het bestuderen van ziekten van het zenuwstelsel zoals Alzheimer11, Parkinson12 en glioblastoom (GBM)13,14,15,16.
2P-IVM biedt een elegante oplossing voor het bestuderen van de micro-omgeving van de tumor tijdens de ontwikkeling van GBM. Terwijl sommige eerdere studies zich richtten op in vitro17 en ex vivo modellen18, implementeerden andere orthotope19 en xenotrope20 in vivo modellen voor het onderzoeken van GBM. Madden et al. voerden native beeldvorming uit van de CNS-1 glioomcellijn van ratten in een muismodel13. Met behulp van een orthotopisch GL261-DsRed-muizenmodel voerden Ricard et al. een intraveneuze toediening van een fluorofoor uit om de bloedvaten in het tumorgebied te versterken in 2P-IVM14.
Hier passen we 2P-IVM toe voor het volgen van de tumorafgifte van fluorescerend gelabelde ijzeroxide nanodeeltjes (NP) in een orthotopisch muismodel van GBM. Met behulp van een craniaal venster stelt deze methode ons in staat om de real-time spatiotemporele verdeling van NP's in de hersenen in detail te bestuderen.

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>0.9% sodium chloride infusion solution</td>
			<td>Baxter Corp</td>
			<td>533-JB1301P</td>
			<td></td>
		</tr>
		<tr>
			<td> 
			Dulbecco&#39;s Modified Eagle Medium</td>
			<td>Invitrogen</td>
			<td>11965-092</td>
			<td></td>
		</tr>
		<tr>
			<td>1 mL syringes</td>
			<td>BD</td>
			<td>Luer-Lok syringe, REF309628</td>
			<td></td>
		</tr>
		<tr>
			<td>10%&#160;FBS</td>
			<td>Thermo fisher</td>
			<td>Cytiva SH30910.03HI</td>
			<td></td>
		</tr>
		<tr>
			<td>10% DMSO</td>
			<td>Sigma-Aldrich</td>
			<td>D8418-50ML</td>
			<td></td>
		</tr>
		<tr>
			<td>2-photon microscope</td>
			<td>Prairie Technologies, Bruker</td>
			<td>Prairie Ultima IV</td>
			<td></td>
		</tr>
		<tr>
			<td>Alcohol applicators, 70%</td>
			<td>Medline Industries, LP</td>
			<td>MDS093810</td>
			<td></td>
		</tr>
		<tr>
			<td>Alcohol, spray bottle</td>
			<td>Decon Labs Inc</td>
			<td>Decon SaniHol, 04-355-122</td>
			<td></td>
		</tr>
		<tr>
			<td>Aluminum foil</td>
			<td>Reynold Brands</td>
			<td>Reynold Wrap non-stick aluminum foil</td>
			<td></td>
		</tr>
		<tr>
			<td>Anesthesia machine</td>
			<td>Patterson Scientific</td>
			<td>SAS3</td>
			<td></td>
		</tr>
		<tr>
			<td>Anesthesia monitoring&#160;</td>
			<td>Kent Scientific&#160;</td>
			<td>MouseSTAT Jr. Rodent Pulsoxymeter</td>
			<td></td>
		</tr>
		<tr>
			<td>Antibiotic-Antimycotic (100x), liquid</td>
			<td>Invitrogen</td>
			<td>15240-096</td>
			<td></td>
		</tr>
		<tr>
			<td>Betadine applicators</td>
			<td>Professional Disposables International, Inc</td>
			<td>S41125</td>
			<td></td>
		</tr>
		<tr>
			<td>Biopsy punch, 5 mm&#160;</td>
			<td>Miltex</td>
			<td>Size 5</td>
			<td></td>
		</tr>
		<tr>
			<td>Buprenorphine sustained release</td>
			<td>Zoo Pharm</td>
			<td>Bup SR Lab, 1.0 mg/mL</td>
			<td>A generic drug can be used instead.&#160;</td>
		</tr>
		<tr>
			<td>C6 rat glioma cell line</td>
			<td>ATCC (American Tissue Culture Collection)</td>
			<td>CCL-107</td>
			<td></td>
		</tr>
		<tr>
			<td>Cannulas</td>
			<td>BD</td>
			<td>16 G, 1.1/2&#8221;, 30 G, 1&#8221;</td>
			<td></td>
		</tr>
		<tr>
			<td>Carprofen</td>
			<td>Pfizer&#160;</td>
			<td>Rimadyl, 50 mg/ml</td>
			<td>A generic drug can be used instead.&#160;</td>
		</tr>
		<tr>
			<td>Cefazoline</td>
			<td>Sagent Pharmaceuticals</td>
			<td>25021-101-10, 1 g/vial</td>
			<td>A generic drug can be used instead.&#160;</td>
		</tr>
		<tr>
			<td>Cell strainer, 40 &#181;m</td>
			<td>Fisher Scientific</td>
			<td>87711</td>
			<td></td>
		</tr>
		<tr>
			<td>Cotton tip applicators, 6&#8221;&#160;</td>
			<td>Dyad Medical Sourcing, LLC</td>
			<td>HCS1005</td>
			<td></td>
		</tr>
		<tr>
			<td>Dental cement</td>
			<td>Stoelting Co</td>
			<td>51459</td>
			<td>Dental cement kit, clear, 2 components</td>
		</tr>
		<tr>
			<td>Dexamethasone</td>
			<td>Bimeda</td>
			<td>138RX, 2 mg/mL</td>
			<td>A generic drug can be used instead.&#160;</td>
		</tr>
		<tr>
			<td>DietGel</td>
			<td>ClearH2O</td>
			<td>Recovery, 72-06-502</td>
			<td></td>
		</tr>
		<tr>
			<td>Drape&#160;</td>
			<td>Cardinal Health</td>
			<td>Bio Shield Wrap</td>
			<td></td>
		</tr>
		<tr>
			<td>Drill</td>
			<td>Saeyang Microtech</td>
			<td>Escort Pro, B08350</td>
			<td></td>
		</tr>
		<tr>
			<td>Drill tips&#160;</td>
			<td>Hager &#38; Meissinger GmbH</td>
			<td>REF310104001001005</td>
			<td>Size 005, US 1/4</td>
		</tr>
		<tr>
			<td>FIJI imaging analysis software</td>
			<td>National Institute of Health</td>
			<td>https://imagej.net/software/fiji/</td>
			<td></td>
		</tr>
		<tr>
			<td>Forceps</td>
			<td>Fisher Scientific</td>
			<td>13-812-41</td>
			<td></td>
		</tr>
		<tr>
			<td>Gauze</td>
			<td>Fisher HealthCare</td>
			<td>Sterile Cotton Gauze Pad, 4 x 4&#8221;, 22-415-469</td>
			<td></td>
		</tr>
		<tr>
			<td>Gelfoam&#160;</td>
			<td>Ethicon Inc.&#160;</td>
			<td>Surgifoam absorbable gelatin sponge, Ref. 1972</td>
			<td></td>
		</tr>
		<tr>
			<td>Germinator&#160;</td>
			<td>Cellpoint Scientific&#160;</td>
			<td>Germinator 500, No. 11688</td>
			<td></td>
		</tr>
		<tr>
			<td>Glass coverslips, 5 mm diameter</td>
			<td>Fisher Scientific</td>
			<td>Menzel Cover glass&#160;</td>
			<td></td>
		</tr>
		<tr>
			<td>Gloves, non-sterile</td>
			<td>Fisher Scientific</td>
			<td>Nitrile powder-free medical examination gloves</td>
			<td></td>
		</tr>
		<tr>
			<td>Gloves, sterile</td>
			<td>Medline Industries, LP</td>
			<td>MDS104070</td>
			<td></td>
		</tr>
		<tr>
			<td>Hair removal cream</td>
			<td>Church &#38; Dwight</td>
			<td>Nair Hair remover lotion&#160;</td>
			<td></td>
		</tr>
		<tr>
			<td>Hamilton syringe</td>
			<td>Hamilton Company Inc</td>
			<td>Gastight #1701, 10 &#181;L</td>
			<td></td>
		</tr>
		<tr>
			<td>HBSS without Ca, Mg</td>
			<td>Fisher Scientific</td>
			<td>PI88284</td>
			<td></td>
		</tr>
		<tr>
			<td>Head bar</td>
			<td>Hongway</td>
			<td>5 mm inner diameter O-rings</td>
			<td></td>
		</tr>
		<tr>
			<td>Heating pad</td>
			<td>Stoelting Co.&#160;</td>
			<td>Rodent warmer X2</td>
			<td></td>
		</tr>
		<tr>
			<td>Insulin syringes</td>
			<td>Exel International Medical Products&#160;</td>
			<td>29G x 1/2&#8243;</td>
			<td></td>
		</tr>
		<tr>
			<td>Iron oxide nanoparticles</td>
			<td>Covis Pharma GmbH</td>
			<td>Feraheme ferumoxytol injection, 510 mg/17 mL, 59338077501</td>
			<td></td>
		</tr>
		<tr>
			<td>Isoflurane</td>
			<td>Dechra</td>
			<td>26675-46-7</td>
			<td></td>
		</tr>
		<tr>
			<td>Mice</td>
			<td>Jackson Laboratories</td>
			<td>NSG, Strain 005557</td>
			<td></td>
		</tr>
		<tr>
			<td>Microscope (surgery)</td>
			<td>Seiler Medical</td>
			<td>Seiler IQ Q-100-220</td>
			<td></td>
		</tr>
		<tr>
			<td>Nanoparticles</td>
			<td>Custom</td>
			<td></td>
			<td>Iron oxide nanoparticles (Ferumoxytol) labeled with fluorescein isothiocyanate</td>
		</tr>
		<tr>
			<td>Ophtalmic ointment</td>
			<td>Major pharmaceuticals</td>
			<td>Lubrifresh P.M. nighttime ointment, 203964</td>
			<td></td>
		</tr>
		<tr>
			<td>Oxygen</td>
			<td>Linde Gas &#38; Equipment Inc.&#160;</td>
			<td>High Pressure Steel K Style Cylinder, 249CF, 2000PSIG, CGA 540</td>
			<td></td>
		</tr>
		<tr>
			<td>Plastic cups</td>
			<td>Georgia-Pacirif Consumer Products</td>
			<td>Dixie Portion Cup, 2 oz., Plastic, Clear, PK2400</td>
			<td></td>
		</tr>
		<tr>
			<td>Polyethylene tubing</td>
			<td>Braintree Scientific</td>
			<td>50-195-5494</td>
			<td></td>
		</tr>
		<tr>
			<td>Scale</td>
			<td>Ohaus Corp</td>
			<td>CR2200</td>
			<td></td>
		</tr>
		<tr>
			<td>Scalpel</td>
			<td>Integra Life Sciences Production Corp</td>
			<td>Integra Miltex Stainless steel disposable scalpel</td>
			<td></td>
		</tr>
		<tr>
			<td>Scissors</td>
			<td>Fisher Scientific</td>
			<td>13-804-18</td>
			<td></td>
		</tr>
		<tr>
			<td>Sealant</td>
			<td>Henkel Corp</td>
			<td>Loctite 4014</td>
			<td></td>
		</tr>
		<tr>
			<td>Single use lab gown</td>
			<td>High Tech Conversions</td>
			<td>17-444-081</td>
			<td></td>
		</tr>
		<tr>
			<td>Stereotactic frame</td>
			<td>Stoelting Co.&#160;</td>
			<td>Stoelting New Standard TM</td>
			<td></td>
		</tr>
		<tr>
			<td>Sterile Vacuum Bottle Top Filtration Systems</td>
			<td>Fisher Scientific</td>
			<td>S2GPU05RE, MilliporeSigma NO.:S2GPU05RE</td>
			<td></td>
		</tr>
		<tr>
			<td>Styrofoam box</td>
			<td>N/A</td>
			<td>N/A</td>
			<td></td>
		</tr>
		<tr>
			<td>Surgical gloves</td>
			<td>Cardinal Health</td>
			<td>19-163-108</td>
			<td></td>
		</tr>
		<tr>
			<td>Surgical glue, 3M Vetbond tissues adhesive</td>
			<td>3M Animal Care Prodcuts</td>
			<td>1469SB</td>
			<td></td>
		</tr>
		<tr>
			<td>Tail vein cathether</td>
			<td>Custom</td>
			<td></td>
			<td>Consists of two 30 G cannulas connected with sillicone tubing&#160;</td>
		</tr>
		<tr>
			<td>TrypLE Express (1x), no phenol red</td>
			<td>Invitrogen</td>
			<td>12604-039</td>
			<td></td>
		</tr>
		<tr>
			<td>Ultraviolett torch</td>
			<td>Spring sunshine technology</td>
			<td>Consciot</td>
			<td></td>
		</tr>
	</tbody>
</table>

two-photon intravital microscopy of glioblastoma in a murine model

De toediening van intraveneus toegediende kankertherapieën aan hersentumoren wordt beperkt door de bloed-hersenbarrière. Een methode om de accumulatie en distributie van macromoleculen in hersentumoren in vivo direct in beeld te brengen, zou ons vermogen om de afgifte van geneesmiddelen in preklinische modellen te begrijpen en te optimaliseren aanzienlijk verbeteren. Dit protocol beschrijft een methode voor real-time in vivo tracking van intraveneus toegediende fluorescerend gelabelde nanodeeltjes met twee-foton intravitale microscopie (2P-IVM) in een muismodel van glioblastoom (GBM).
Het protocol bevat een beschrijving in meerdere stappen van de procedure, inclusief anesthesie en analgesie van proefdieren, het creëren van een schedelvenster, GBM-celimplantatie, het plaatsen van een hoofdbalk, het uitvoeren van 2P-IVM-onderzoeken en postoperatieve zorg voor vervolgonderzoeken op lange termijn. We tonen representatieve 2P-IVM-beeldvormingssessies en beeldanalyses, onderzoeken de voor- en nadelen van deze technologie en bespreken mogelijke toepassingen.
Deze methode kan eenvoudig worden aangepast en aangepast voor verschillende onderzoeksvragen op het gebied van in vivo preklinische beeldvorming van de hersenen.

Two-photon intravital microscopy (2P-IVM) is a fluorescence imaging technique that allows the visualization of living tissue1.
First developed in the 1990s, 2P-IVM has been used for in vivo analysis of the retina2, kidney3, small intestine4, cochlea5, heart6, trachea7, and the brain in various preclinical models8,9. In the field of neuroscience, 2P-IVM has gained importance as a technique for real-time imaging of the healthy brain in awake animals10, as well as studying diseases of the nervous system such as Alzheimer&#39;s11, Parkinson&#39;s12 and glioblastoma (GBM)13,14,15,16.
2P-IVM offers an elegant solution for studying the tumor microenvironment during the development of GBM. While some previous studies focused on in vitro17 and ex vivo models18, others implemented orthotopic19 and xenotropic20&#160;in vivo models for examining GBM. Madden et al. performed native imaging of CNS-1 rat glioma cell line in a mouse model13. Using an orthotopic GL261-DsRed murine model, Ricard et al. performed an intravenous administration of a fluorophore to enhance the blood vessels in the tumor region in 2P-IVM14.
Here, we apply 2P-IVM for tracking the tumor delivery of fluorescent-labeled iron oxide nanoparticles (NP) in an orthotopic mouse model of GBM. Using a cranial window, this method allows us to study the real-time spatiotemporal distribution of NPs in the brain in detail.

Auteur in de schijnwerpers: multimodale beeldvormingsstrategieën voor het optimaliseren van medicijnafgifte en vroege detectie bij de behandeling van glioblastoom

Intravitale microscopie met twee fotonen van glioblastoom in een muizenmodel

Glioblastoma is one of the most common primary brain cancer and is associated with fast growth and poor life expectancy. Developing effective therapies for glioblastoma remains a major challenge since the delivery of therapeutics is limited by the blood brain barrier. A method to directly image the accumulation and distribution of macromolecules in the brain would greatly enhance our ability to understand and optimize drug delivery.Two-photon microscopy offers an elegant solution for studying the real-time distribution of nanoparticles in the preclinical model of glioblastoma. By modifying the nanoparticle used in this study, it's possible to investigate the delivery of different drug candidates and combination therapies on a cellular and molecular level. In addition to two-photon intravital microscopy, the iron oxide component of these nanoparticles allow for multimodal imaging with MRI or MPI.For the future, imaging facilities could serve in the realization of early detection to cancer, thereby leading to more effective therapies against malignant neoplasia. One path to achieve this is to merge two-photon intravital microscopy with other imaging modalities such as positron emission tomography and photoacoustic ultrasound.

Hier voerden we craniale raamchirurgie uit en transplanteerden we C6-cellen in een NSG-muismodel van GBM (n = 5). Een goede afdichting tussen alle componenten die betrokken zijn bij het maken van het venster (Figuur 1A) zorgt voor de duurzaamheid van de ramen voor beeldvorming op lange termijn en vermindert bovendien de morbiditeit. Met behulp van de voor in vivo 2P-IVM aangepaste fase (Figuur 2) konden we dieren tot 2 uur lang onder narcose in beeld br...

Watch this Scientific Journal Video about Two-Photon Intravital Microscopy of Glioblastoma in a Murine Model at JoVE.com

We presenteren een nieuwe benadering voor twee-fotonmicroscopie van de tumorafgifte van fluorescerend gelabelde ijzeroxide-nanodeeltjes aan glioblastoom in een muismodel.

The delivery of intravenously administered cancer therapeutics to brain tumors is limited by the blood-brain barrier. A method to directly image the ...

Glioblastoom is een van de meest voorkomende primaire hersenkanker en wordt in verband gebracht met snelle groei en een slechte levensverwachting. Het ontwikkelen van effectieve therapieën voor glioblastoom blijft een grote uitdaging, aangezien de toediening van therapieën wordt beperkt door de bloed-hersenbarrière. Een methode om de accumulatie en distributie van macromoleculen in de hersenen direct in beeld te brengen, zou ons vermogen om de afgifte van geneesmiddelen te begrijpen en te optimaliseren aanzienlijk verbeteren.Twee-fotonmicroscopie biedt een elegante oplossing voor het bestuderen van de real-time verdeling van nanodeeltjes in het preklinische model van glioblastoom. Door het nanodeeltje dat in deze studie wordt gebruikt aan te passen, is het mogelijk om de afgifte van verschillende kandidaat-geneesmiddelen en combinatietherapieën op cellulair en moleculair niveau te onderzoeken. Naast intravitale microscopie met twee fotonen maakt de ijzeroxidecomponent van deze nanodeeltjes multimodale beeldvorming met MRI of MPI mogelijk.Voor de toekomst zouden beeldvormingsfaciliteiten kunnen dienen bij het realiseren van vroege opsporing van kanker, wat leidt tot effectievere therapieën tegen kwaadaardige neoplasie. Een manier om dit te bereiken is het samenvoegen van intravitale microscopie met twee fotonen met andere beeldvormingsmodaliteiten zoals positronemissietomografie en fotoakoestische echografie.

two-photon-intravital-microscopy-of-glioblastoma-in-a-murine-model

Research

JoVE Journal

Cancer Research

Two-Photon Intravital Microscopy of Glioblastoma in a Murine Model

The delivery of intravenously administered cancer therapeutics to brain tumors is limited by the blood-brain barrier. A method to directly image the accumulation and distribution of macromolecules in brain tumors in vivo would greatly enhance our ability to understand and optimize drug delivery in preclinical models. This protocol describes a method for real-time in vivo tracking of intravenously administered fluorescent-labeled nanoparticles with two-photon intravital microscopy (2P-IVM) in a mouse model of glioblastoma (GBM).
The protocol contains a multi-step description of the procedure, including anesthesia and analgesia of experimental animals, creating a cranial window, GBM cell implantation, placing a head bar, conducting 2P-IVM studies, and post-surgical care for long-term follow-up studies. We show representative 2P-IVM imaging sessions and image analysis, examine the advantages and disadvantages of this technology, and discuss potential applications.
This method can be easily modified and adapted for different research questions in the field of in vivo preclinical brain imaging.

We present a novel approach for two-photon microscopy of the tumor delivery of fluorescent-labeled iron oxide nanoparticles to glioblastoma in a mouse model.