המחברים בחום מודים לד&quot;ר KK Fenrich, ד&quot;ר MC. Amoureux, פ וובר וא &#39;Jaouen לדיונים מועילים; מ &#39;Hocine, ג Meunier, מ&#39; Metwaly, ס &#39;Bensemmane, J. Bonnardel, צוות של מתקן בעלי החיים בIBDML וצוות של פלטפורמת ההדמיה PicSIL בIBDML לקבלת תמיכה טכנית. עבודה זו נתמכה על ידי מענקים מהמכון הלאומי du הסרטן (האינקה-DGOS-INSERM6038) לGR, סוכנות הידיעות Nationale de la משוכלל ונדיר (ANR JCJC PathoVisu3Dyn), הפדרציה לשפוך la משוכלל ונדיר sur le Cerveau (FRC) לFD, על ידי מלגות מהפדרציה דה לה משוכלל ונדיר Médicale וCancéropole PACA לCR.

<ol>
	<li>DeAngelis, L. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Brain+tumors.">Brain tumors.</a> N Engl J Med. 344, 114-123 (2001).</li><li>Ricard, D., 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=Primary+brain+tumours+in+adults.">Primary brain tumours in adults.</a> Lancet. 379, 1984-1996 (2012).</li><li>Prados, M. D., 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=Phase+III+randomized+study+of+radiotherapy+plus+procarbazine,+lomustine,+and+vincristine+with+or+without+BUdR+for+treatment+of+anaplastic+astrocytoma:+final+report+of+RTOG+9404.">Phase III randomized study of radiotherapy plus procarbazine, lomustine, and vincristine with or without BUdR for treatment of anaplastic astrocytoma: final report of RTOG 9404.</a> Int J Radiat Oncol Biol Phys. 58, 1147-1152 (2004).</li><li>Piao, 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=Glioblastoma+resistance+to+anti-VEGF+therapy+is+associated+with+myeloid+cell+infiltration,+stem+cell+accumulation,+and+a+mesenchymal+phenotype.">Glioblastoma resistance to anti-VEGF therapy is associated with myeloid cell infiltration, stem cell accumulation, and a mesenchymal phenotype.</a> Neuro Oncol. 14, 1379-1392 (2012).</li><li>Zhai, H., Heppner, F. L., Tsirka, S. E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Microglia/macrophages+promote+glioma+progression.">Microglia/macrophages promote glioma progression.</a> Glia. 59, 472-485 (2011).</li><li>Studwell, A. J., Kotton, D. N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+shift+from+cell+cultures+to+creatures:+in+vivo+imaging+of+small+animals+in+experimental+regenerative+medicine.">A shift from cell cultures to creatures: in vivo imaging of small animals in experimental regenerative medicine.</a> Mol Ther. 19, 1933-1941 (2011).</li><li>Ustione, A., Piston, D. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+simple+introduction+to+multiphoton+microscopy.">A simple introduction to multiphoton microscopy.</a> J Microsc. 243, 221-226 (2011).</li><li>Ricard, 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=Short-term+effects+of+synchrotron+irradiation+on+vasculature+and+tissue+in+healthy+mouse+brain.">Short-term effects of synchrotron irradiation on vasculature and tissue in healthy mouse brain.</a> J Synchrotron Radiat. 16, 477-483 (2009).</li><li>von Baumgarten, 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=Bevacizumab+has+differential+and+dose-dependent+effects+on+glioma+blood+vessels+and+tumor+cells.">Bevacizumab has differential and dose-dependent effects on glioma blood vessels and tumor cells.</a> Clin Cancer Res. 17, 6192-6205 (2011).</li><li>Helmchen, F., Denk, W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Deep+tissue+two-photon+microscopy.">Deep tissue two-photon microscopy.</a> Nat Methods. 2, 932-940 (2005).</li><li>Mostany, R., Portera-Cailliau, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+craniotomy+surgery+procedure+for+chronic+brain+imaging.">A craniotomy surgery procedure for chronic brain imaging.</a> J Vis Exp. , 680 (2008).</li><li>Lathia, J. 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B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Brain+tumor+imaging:+live+imaging+of+glioma+by+two-photon+microscopy.">Brain tumor imaging: live imaging of glioma by two-photon microscopy.</a> Cold Spring Harb Protoc. 2013, (2013).</li><li>Winkler, 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=Imaging+glioma+cell+invasion+in+vivo+reveals+mechanisms+of+dissemination+and+peritumoral+angiogenesis.">Imaging glioma cell invasion in vivo reveals mechanisms of dissemination and peritumoral angiogenesis.</a> Glia. 57, 1306-1315 (2009).</li><li>Newcomb, E., Zagzag, D., Van Meir, E. 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החוקרים מצהירים כי אין להם אינטרסים כלכליים מתחרים.

גישה זו מאפשרת השימוש בשיטות הדמיה אופטיות כדי לפקח על ימים ושבועות הצמיחה של גליומה המושתלת orthotopically. בעלי החיים זהים בהמשך יכולים להיות נתונה לכמעט כל שיטת הדמיה מוחית במהלך הפתולוגיה; עדיין ההכנה הספציפית במיקרוסקופ שני פוטונים מציעה הזדמנות הייחודית להשיג רזולו...

multiforme glioblastoma מופיע כצורה האגרסיבית ביותר של גידול במוח במבוגרים עם חציון הישרדות של 12 חודשים ושיעור הישרדות לאחר 5 שנים של 5%. ניהול קליני מסתמך על ניתוח, הקרנות וכימותרפיה משמשת לעתים קרובות בשילוב. עם זאת, ההשפעות של טיפולים אלה יישארו פליאטיבי 1-3. עד כה, רוב מחקרי נוירו אונקולוגיה מסתמכים על טכניקות כי הם רק מסוגלים לספק תצוגה סטטית ובוצעו על קבוצות גדולות של בעלי חיים הנושאים גידול הקריבו בזמן נקודות שונות (ראה, למשל, 4,5). הפיתוח האחרון של שיטות מעקב המבוססים על ההדמיה intravital מאפשר לימוד צמיחת גליומה ויחסי הגומלין בין תאים סרטניים והמיקרו pathophysiological על אותו בעלי החיים לאורך זמן. זו פותחת את הדרך ליצירה בלעדית של מידע שהייתה בלתי ניתן להשגה עד כה 6. בעלי חיים מהונדסים מבטא תגי ניאון בתאים של עניין עשויים להיות שימושד ללמוד אינטראקציות ספציפיות בין תאים סרטניים ותאי עצב לדוגמא במאמר זה. במהלך העשור האחרון, שני הפוטונים במיקרוסקופ intravital 7 הפך לסטנדרטי במחקרי נוירו אונקולוגיה בסיסיים וניסויים פרה 8,9 ביכולתה לבצע תצפית intravital עמוקה של מוח עכבר זהב (&gt; 500 מיקרומטר מתחת הדורה מאטר-) עם רזולוציה מרחבית micrometric 10. באמצעות מיקרוסקופ שני פוטונים intravital עם מודלים של בעלי החיים orthotopical המושתלים עם חלון גולגולתי כרוני 11, ניתן לעקוב אחר התקדמות גידול לאורך זמן באותו 9,12 עכבר. אחד החסרונות העיקריים של מודלים של בעלי החיים שפורסמו בעבר אלה הוא, עם זאת, הם לא מחקים את המגבלות פיזיות הקובעים את צמיחת גידול כדורה מאטר, אינו אטום לאחר ההזרקה של ההשעיה תא 9,13,14. תאי גליומה עלולים לדלוף בחלל extradural הפיכת מודל גליומה orthotopic לאחד heterotopic. מודל החיה המוצג כאן מורכב בהזרקה של אליפטית של תאי גליומה ניאון בקליפת המוח בעומק של 200 מיקרומטר ואחרי האיטום של הדורה מאטר, עם ג&#39;ל, חמי חרוז dextran צולבים ודבק histo התואם . צמיחת הגידול מכן הוגבלה לparenchyma המוח ששומר על מגבלות פיזיות pathophysiological. חלון זכוכית כרונית המושתל מעל לגידול מאפשר גישה אופטית קלה עבור שני הפוטונים במיקרוסקופ intravital. שימוש בבעלי חיים מהונדסים מבטא תגי ניאון בתאים של עניין זה ניתן לבצע מעקב של צמיחת גליומה לאורך זמן וללמוד את האינטראקציה שלה עם microenvironment (כאן עם נוירונים וכלי דם מודגשים עם dextrans ניאון).

<table border="0" cellpadding="0" cellspacing="0" width="1337">
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		<col />
		<col />
	</colgroup>
	<tbody>
		<tr height="38">
			<td height="38" style="height:38px;width:425px;">Drill</td>
			<td style="width:383px;">Dremel (Germany)</td>
			<td style="width:156px;">398</td>
			<td style="width:375px;">any high quality surgical bone drill would suffice</td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;width:425px;">Drill burr (#1/4 Carbide Round Burr)</td>
			<td style="width:383px;">World Precision Instruments (USA)</td>
			<td>501860 (#1/4)</td>
			<td>also sold by Harvard Apparatus</td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;">Tissue scissors</td>
			<td style="width:383px;">World Precision Instruments (USA)</td>
			<td>14395</td>
			<td style="width:375px;"></td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;">Dumont tweezers M5S</td>
			<td style="width:383px;">World Precision Instruments (USA)</td>
			<td>501764</td>
			<td></td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;">Dental cement</td>
			<td>GACD (USA)</td>
			<td>12-565 &#38; 12-568</td>
			<td></td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;">Cyanoacrylate</td>
			<td>Eleco-EFD (France)</td>
			<td>Cyanolit 201</td>
			<td></td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;">Glass capillaries without filament</td>
			<td>Clark Electromedical Instruments (UK)</td>
			<td>GC100-15</td>
			<td></td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;">Microliter syringe (25 &#181;l)</td>
			<td>Hamilton (USA)</td>
			<td>702</td>
			<td></td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;">Micromanipulator</td>
			<td style="width:383px;">World Precision Instruments (USA)</td>
			<td>Kite-R</td>
			<td></td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;">T derivation (3-way stopcock - Luer lock)</td>
			<td style="width:383px;">World Precision Instruments (USA)</td>
			<td>14035-10</td>
			<td></td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;">Stereotactic frame (mouse adaptor)</td>
			<td style="width:383px;">World Precision Instruments (USA)</td>
			<td>502063</td>
			<td></td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;">Glass coverslips</td>
			<td>Warner Instruments (USA)</td>
			<td>CS-5R (64-0700)</td>
			<td></td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;">Cross-linked dextran gel (Sephadex) G50 Coarse 100-300 &#181;m beads</td>
			<td>Available from various suppliers including Sigma (Germany)</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;">Eye ointment</td>
			<td>TVM (France)</td>
			<td>Ocry-gel</td>
			<td></td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;">Fluorescence macroscope</td>
			<td>Leica MZFLIII (Germany)</td>
			<td></td>
			<td>also sold by other companies</td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;">Two-photon microscope</td>
			<td>Zeiss LSM 7MP (Germany)</td>
			<td></td>
			<td>also sold by other companies (Nikon, &#8230;)</td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;">Infrared tunable femtosecond laser (Ma&#239;-Ta&#239;)</td>
			<td>Spectra Physics (USA)</td>
			<td></td>
			<td>also sold by other companies</td>
		</tr>
	</tbody>
</table>

an orthotopic glioblastoma mouse model maintaining brain parenchymal physical constraints and suitable for intravital two-photon microscopy

multiforme glioblastoma (GBM) הוא הצורה האגרסיבית ביותר של גידולים במוח ללא טיפולים מרפאים זמינים עד כה. מודלים Murine של פתולוגיה זו מסתמכים על הזריקה של השעיה של תאי גליומה לתוך המוח parenchyma הבא חתך של הדורה-מאטר. ואילו התאים צריכים להיות מוזרקים באופן שטחי להיות נגיש לשני הפוטונים במיקרוסקופ intravital, זריקות שטחיות לא מצליחות לשחזר את תנאי physiopathological. ואכן, שנמלט דרך מערכת ההזרקה רוב התאים הסרטניים מגיעים לשטח הנוסף, שבו הם dural להרחיב מהירים באופן חריג בהעדר אילוצים מכאניים מparenchyma. השיפורים שלנו מורכבים לא רק בfocally השתלה אליפטית גליומה במקום הזרקת השעיה של תאי גליומה בשכבות השטחיות של קליפת המוח, אלא גם בסתימת אתר ההזרקה על ידי חמי חרוז ג&#39;ל dextran צולבים כי הוא דבוק לsurrounparenchyma דינג ואטום לדורה מאטר-עם cyanoacrylate. בסך הכל אמצעים אלה לאכוף את הרחבה וחדירה הפיזיולוגיות של התאים הסרטניים בתוך parenchyma המוח. Craniotomy סופו של דבר סגרה עם חלון זכוכית ביצרו לגולגולת כדי לאפשר הדמיה כרונית במשך שבועות בהעדר התפתחות רקמת צלקת. ניצול של בעלי חיים מהונדסים ניאון מורכב עם תאים סרטניים ניאון שהראינו שהדינמיקה של אינטראקציות המתרחשות בין תאי גליומה, תאי עצב (למשל עכברי Thy1-CFP) וכלי דם (מודגש על ידי הזרקה תוך ורידית של צבע פלואורסצנטי) ניתן דמיינו ידי intravital שני פוטונים במיקרוסקופ במהלך ההתקדמות של המחלה. האפשרות לתמונה ברזולוציה גידול מיקרוסקופית בסביבת מוחין בסכנה מינימאלית מהווה שיפור של מודלים של בעלי החיים GBM הנוכחיים שאמור להועיל לתחום נוירו אונקולוגיה ובדיקות סמים. </p&gt;

ברגע שהפרוטוקול הניתוחי מבוצע (איור 1), ניתן לראות בעלי חיים באמצעות מיקרוסקופ פלואורסצנטי מעל שבועות עד הקרבה. תגובה דלקתית יכולה להיות שנצפתה לאחר הניתוח, הנעלם בתוך שבוע או שבועות. גידול יכול להיות שנצפה על ידי שיטות מיקרוסקופיה שונות, כולל macroscopy ניאון וש?...

Watch this Scientific Journal Video about An Orthotopic Glioblastoma Mouse Model Maintaining Brain Parenchymal Physical Constraints and Suitable for Intravital Two-photon Microscopy at JoVE.com

An Orthotopic Glioblastoma Mouse Model Maintaining Brain Parenchymal Physical Constraints and Suitable for Intravital Two-photon Microscopy

הקמנו מודל גליובלסטומה orthotopic קליפת המוח בעכברים לשני הפוטונים במיקרוסקופ intravital שמשחזר אילוצי biophysical בדרך כלל במשחק במהלך הצמיחה של הגידול. חלון זכוכית כרוני החלפת הגולגולת מעל לגידול מאפשר המעקב של התקדמות הגידול לאורך זמן על ידי שני פוטונים במיקרוסקופ.

Glioblastoma עכבר דגם orthotopic שמירה על אילוצי המוח של רקמת ריאה, פיסיים ומתאים לשני פוטונים במיקרוסקופ Intravital

Glioblastoma multiforme (GBM) is the most aggressive form of brain tumors with no curative treatments available to date.
Murine models of this pathology ...

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19.6K Views.  Aix Marseille University.  הקמנו מודל גליובלסטומה orthotopic קליפת המוח בעכברים לשני הפוטונים במיקרוסקופ intravital שמשחזר אילוצי biophysical בדרך כלל במשחק במהלך הצמיחה של הגידול. חלון זכוכית כרוני החלפת הגולגולת מעל לגידול מאפשר המעקב של התקדמות הגידול לאורך זמן על ידי שני פוט?...

Video: An Orthotopic Glioblastoma Mouse Model Maintaining Brain Parenchymal Physical Constraints and Suitable for Intravital Two-photon Microscopy

An Orthotopic Model of Murine Bladder Cancer

In this straightforward procedure, bladder tumors are established in female C57 mice through the use of catheterization, local cauterization, and subsequent cell adhesion. After their bladders are transurethrally catheterized and drained, animals are again catheterized to permit insertion of a platinum wire into bladders without damaging the urethra or bladder. The catheters are made of Teflon to serve as an insulator for the wire, which will conduct electrical current into the bladder to create a burn injury. An electrocautery unit is used to deliver 2.5W to the exposed end of the wire, burning away extracellular layers and providing attachment sites for carcinoma cells that are delivered in suspension to the bladder through a subsequent catheterization. Cells remain in the bladder for 90 minutes, after which the catheters are removed and the bladders allowed to drain naturally. The development of tumor is monitored via ultrasound. Specific attention is paid to the catheterization technique in the accompanying video.

Bladder tumors are established in female mice in a minimally invasive fashion through catheterization, local cauterization, and subsequent adhesion of carcinoma cells to the burn sites.

דגם orthotopic של סרטן שלפוחית ​​השתן Murine

In this straightforward procedure, bladder tumors are established in female C57 mice through the use of catheterization, local cauterization, and ...

Multi-photon Imaging of Tumor Cell Invasion in an Orthotopic Mouse Model of Oral Squamous Cell Carcinoma

Loco-regional invasion of head and neck cancer is linked to metastatic risk and presents a difficult challenge in designing and implementing patient management strategies. Orthotopic mouse models of oral cancer have been developed to facilitate the study of factors that impact invasion and serve as model system for evaluating anti-tumor therapeutics. In these systems, visualization of disseminated tumor cells within oral cavity tissues has typically been conducted by either conventional histology or with in vivo bioluminescent methods. A primary drawback of these techniques is the inherent inability to accurately visualize and quantify early tumor cell invasion arising from the primary site in three dimensions. Here we describe a protocol that combines an established model for squamous cell carcinoma of the tongue (SCOT) with two-photon imaging to allow multi-vectorial visualization of lingual tumor spread. The OSC-19 head and neck tumor cell line was stably engineered to express the F-actin binding peptide LifeAct fused to the mCherry fluorescent protein (LifeAct-mCherry). Fox1nu/nu mice injected with these cells reliably form tumors that allow the tongue to be visualized by ex-vivo application of two-photon microscopy. This technique allows for the orthotopic visualization of the tumor mass and locally invading cells in excised tongues without disruption of the regional tumor microenvironment. In addition, this system allows for the quantification of tumor cell invasion by calculating distances that invaded cells move from the primary tumor site. Overall this procedure provides an enhanced model system for analyzing factors that contribute to SCOT invasion and therapeutic treatments tailored to prevent local invasion and distant metastatic spread. This method also has the potential to be ultimately combined with other imaging modalities in an in vivo setting.

A comprehensive overview of the techniques involved in generating a mouse model of oral cancer and quantitative monitoring of tumor invasion within the tongue through multi-photon microscopy of labeled cells is presented. This system can serve as a useful platform for the molecular assessment and drug efficacy of anti-invasive compounds.

Multi-פוטון הדמיה של הפלישה תאים סרטניים במודל עכבר orthotopic של קרצינומה של תאים קשקשיים אוראלי

Loco-regional invasion of head and neck cancer is linked to metastatic risk and presents a difficult challenge in designing and implementing patient ...

Combination Radiotherapy in an Orthotopic Mouse Brain Tumor Model

Glioblastoma multiforme (GBM) are the most common and aggressive adult primary brain tumors1. In recent years there has been substantial progress in the understanding of the mechanics of tumor invasion, and direct intracerebral inoculation of tumor provides the opportunity of observing the invasive process in a physiologically appropriate environment2. As far as human brain tumors are concerned, the orthotopic models currently available are established either by stereotaxic injection of cell suspensions or implantation of a solid piece of tumor through a complicated craniotomy procedure3. In our technique we harvest cells from tissue culture to create a cell suspension used to implant directly into the brain. The duration of the surgery is approximately 30 minutes, and as the mouse needs to be in a constant surgical plane, an injectable anesthetic is used. The mouse is placed in a stereotaxic jig made by Stoetling (figure 1). After the surgical area is cleaned and prepared, an incision is made; and the bregma is located to determine the location of the craniotomy. The location of the craniotomy is 2 mm to the right and 1 mm rostral to the bregma. The depth is 3 mm from the surface of the skull, and cells are injected at a rate of 2 &mu;l every 2 minutes. The skin is sutured with 5-0 PDS, and the mouse is allowed to wake up on a heating pad. From our experience, depending on the cell line, treatment can take place from 7-10 days after surgery. Drug delivery is dependent on the drug composition. For radiation treatment the mice are anesthetized, and put into a custom made jig. Lead covers the mouse's body and exposes only the brain of the mouse. The study of tumorigenesis and the evaluation of new therapies for GBM require accurate and reproducible brain tumor animal models. Thus we use this orthotopic brain model to study the interaction of the microenvironment of the brain and the tumor, to test the effectiveness of different therapeutic agents with and without radiation.

The purpose of this article is to describe the use of an orthotopic glioblastoma model for chemoradiation studies. This article will go though cell processing, implanting, and radiotherapy of the mouse using an intracranial model.

שילוב הקרנות של מודל העכבר Orthotopic המוח גידול

Glioblastoma multiforme (GBM) are the most common and aggressive adult primary brain tumors1. In recent years there has been substantial progress in the ...

An Orthotopic Mouse Model of Anaplastic Thyroid Carcinoma

Several types of animal models of human thyroid carcinomas have been established, including subcutaneous xenograft and orthotopic implantation of cancer cells into immunodeficient mice. Subcutaneous xenograft models have been valuable for preclinical screening and evaluation of new therapeutic treatments. There are a number of advantages to using a subcutaneous model; 1) rapid, 2) reproducible, and 3) tumor establishment, growth, and response to therapeutic agents may be monitored by visual inspection. However, substantial evidence has shed light on the short-comings of subcutaneous xenograft models1-3. For instance, medicinal treatments demonstrating curative properties in subcutaneous xenograft models often have no notable impact on the human disease. The microenvironment of the site of xenographic transplantation or injection lies at the heart of this dissimilarity.
Orthotopic tumor xenograft models provide a more biologically relevant context in which to study the disease. The advantages of implanting diseased cells or tissue into their anatomical origin equivalent within a host animal includes a suitable site for tumor-host interactions, development of disease-related metastases and the ability to examine site-specific influence on investigational therapeutic remedies. Therefore, orthotopic xenograft models harbor far more clinical value because they closely reproduce human disease. For these reasons, a number of groups have taken advantage of an orthotopic thyroid cancer model as a research tool4-7.
Here, we describe an approach that establishes an orthotopic model for the study of anaplastic thyroid carcinoma (ATC), which is highly invasive, resists treatment, and is virtually fatal in all diagnosed patients. Cultured ATC cells are prepared as a dissociated cellular suspension in a solution containing a basement membrane matrix. A small volume is slowly injected into the right thyroid gland. Overall appearance and health of the mice are monitored to ensure minimal post-operative complications and to gauge pathological penetrance of the cancer. Mice are sacrificed at 4 weeks, and tissue is collected for histological analysis. Animals may be taken at later time-points to examine more advance progression of the disease. Production of this orthotopic mouse model establishes a platform that accomplishes two objectives: 1) further our understanding of ATC pathology, and 2) screen current and future therapeutic agents for efficacy in combating ATC.

Generation of an orthotopic mouse model of anaplastic thyroid carcinoma is described here. This technique employs surgical placement of human anaplastic thyroid cancer cells into the thyroid of immunodeficient mice, thus creating a more clinically relevant setting to study disease progression as well as screen innovative therapeutic interventions.

מודל עכבר orthotopic של קרצינומה של בלוטת התריס אנפלסטית

Several types of animal models of human thyroid carcinomas have been established, including subcutaneous xenograft and orthotopic implantation of cancer ...

An Orthotopic Bladder Cancer Model for Gene Delivery Studies

Bladder cancer is the second most common cancer of the urogenital tract and novel therapeutic approaches that can reduce recurrence and progression are needed. The tumor microenvironment can significantly influence tumor development and therapy response. It is therefore often desirable to grow tumor cells in the organ from which they originated. This protocol describes an orthotopic model of bladder cancer, in which MB49 murine bladder carcinoma cells are instilled into the bladder via catheterization. Successful tumor cell implantation in this model requires disruption of the protective glycosaminoglycan layer, which can be accomplished by physical or chemical means. In our protocol the bladder is treated with trypsin prior to cell instillation. Catheterization of the bladder can also be used to deliver therapeutics once the tumors are established. This protocol describes the delivery of an adenoviral construct that expresses a luciferase reporter gene. While our protocol has been optimized for short-term studies and focuses on gene delivery, the methodology of mouse bladder catheterization has broad applications.

Implantation of cancer cells into the organ of origin can serve as a useful preclinical model to evaluate novel therapies. MB49 bladder carcinoma cells can be grown within the bladder following intravesical instillation. This protocol demonstrates catheterization of the mouse bladder for the purpose of tumor implantation and adenoviral delivery.

סרטן שלפוחית ​​השתן לדגם orthotopic ג&#39;ין משלוח לימודים

Bladder cancer is the second most common cancer of the urogenital tract and novel therapeutic approaches that can reduce recurrence and progression are ...

An Orthotopic Murine Model of Human Prostate Cancer Metastasis

Our laboratory has developed a novel orthotopic implantation model of human prostate cancer (PCa). As PCa death is not due to the primary tumor, but rather the formation of distinct metastasis, the ability to effectively model this progression pre-clinically is of high value. In this model, cells are directly implanted into the ventral lobe of the prostate in Balb/c athymic mice, and allowed to progress for 4-6 weeks. At experiment termination, several distinct endpoints can be measured, such as size and molecular characterization of the primary tumor, the presence and quantification of circulating tumor cells in the blood and bone marrow, and formation of metastasis to the lung. In addition to a variety of endpoints, this model provides a picture of a cells ability to invade and escape the primary organ, enter and survive in the circulatory system, and implant and grow in a secondary site. This model has been used effectively to measure metastatic response to both changes in protein expression as well as to response to small molecule therapeutics, in a short turnaround time.

This orthotopic model of human prostate cancer allows for quantification of tumor size, circulating tumor cells, and formation of distinct metastasis to the lung. As cells must escape the primary organ, enter the blood stream, and implant into a secondary site, this model effectively recapitulates the scenario in humans.

מודל Murine orthotopic של אדם סרטן ערמונית גרורה

Our laboratory has developed a novel orthotopic implantation model of  human prostate cancer (PCa). As PCa death is not due to the primary tumor, but  ...

Acute Brain Trauma in Mice Followed By Longitudinal Two-photon Imaging

Although acute brain trauma often results from head damage in different accidents and affects a substantial fraction of the population, there is no effective treatment for it yet. Limitations of currently used animal models impede understanding of the pathology mechanism. Multiphoton microscopy allows studying cells and tissues within intact animal brains longitudinally under physiological and pathological conditions. Here, we describe two models of acute brain injury studied by means of two-photon imaging of brain cell behavior under posttraumatic conditions. A selected brain region is injured with a sharp needle to produce a trauma of a controlled width and depth in the brain parenchyma. Our method uses stereotaxic prick with a syringe needle, which can be combined with simultaneous drug application. We propose that this method can be used as an advanced tool to study cellular mechanisms of pathophysiological consequences of acute trauma in mammalian brain in vivo. In this video, we combine acute brain injury with two preparations: cranial window and skull thinning. We also discuss advantages and limitations of both preparations for multisession imaging of brain regeneration after trauma.

Acute brain trauma is a severe injury that has no adequate treatment to date. Multiphoton microscopy allows studying longitudinally the process of acute brain trauma development and probing therapeutical strategies in rodents. Two models of acute brain trauma studied with in vivo two-photon imaging of brain are demonstrated in this protocol.

טראומה מוחית חריפה בעכברים אחריו שני פוטונים הדמיה אורכית

Although acute brain trauma often results from head damage in different accidents and affects a substantial fraction of the population, there is no ...

Bioluminescence Imaging of an Immunocompetent Animal Model for Glioblastoma

In contrast to commonly reported human glioma xenograft animal models, GL261 murine glioma xenografts recapitulate nearly all relevant clinical and histopathologic features of the human disease. When GL261 cells are implanted intracranially in syngeneic C57BL/6 mice, the model has the added advantage of maintaining an intact immune microenvironment. Stable expression of luciferase in GL261 cells allows non-invasive cost effective bioluminescence monitoring of intracranial tumor growth. We have recently demonstrated that luciferase expression in GL261 cells does not affect the tumor growth properties, tumor cell immunomodulatory cytokine expression, infiltration of immune cells into the tumor, or overall survival of animals bearing the intracranial tumor. Therefore, it appears that the GL261 luciferase glioma model can be useful in the study of novel chemotherapeutic and immunotherapeutic modalities. Here we report the technique for generating stable luciferase expression in GL261 cells and how to study the in vitro and in vivo growth of the tumor cells by bioluminescence imaging.

GL261 glioma cells provide a useful immunocompetent animal model of glioblastoma. The goals of this protocol are to demonstrate proper techniques for monitoring intracranial tumor growth using in vivo bioluminescence imaging, and to verify the utility of luciferase-modified GL261 cells for studying tumor immunology and immunotherapeutic approaches for treating glioblastoma.

הדמיה פליטת אור של דגם עם מערכת חיסון בבעלי חיים לגליובלסטומה

In contrast to commonly reported human glioma xenograft animal models, GL261 murine glioma xenografts recapitulate nearly all relevant clinical and ...

An Orthotopic Mouse Model of Spontaneous Breast Cancer Metastasis

Metastasis is the primary cause of mortality of breast cancer patients. The mechanism underlying cancer cell metastasis, including breast cancer metastasis, is largely unknown and is a focus in cancer research. Various breast cancer spontaneous metastasis mouse models have been established. Here, we report a simplified procedure to establish orthotopic transplanted breast cancer primary tumor and resultant spontaneous metastasis that mimic human breast cancer metastasis. Combined with the bioluminescence live tumor imaging, this mouse model allows tumor growth and progression kinetics to be monitored and quantified. In this model, a low dose (1 x 104 cells) of 4T1-Luc breast cancer cells was injected into BALB/c mouse mammary fat pad using a tuberculin syringe. Mice were injected with luciferin and imaged at various time points using a bioluminescent imaging system. When the primary tumors grew to the size limit as in the IACUC-approved protocol (approximately 30 days), mice were anesthetized under constant flow of 2% isoflurane and oxygen. The tumor area was sterilized with 70% ethanol. The mouse skin around the tumor was excised to expose the tumor which was removed with a pair of sterile scissors. Removal of the primary tumor extends the survival of the 4T-1 tumor-bearing mice for one month. The mice were then repeatedly imaged for metastatic tumor spreading to distant organs. Therapeutic agents can be administered to suppress tumor metastasis at this point. This model is simple and yet sensitive in quantifying breast cancer cell growth in the primary site and progression kinetics to distant organs, and thus is an excellent model for studying breast cancer growth and progression, and for testing anti-metastasis therapeutic and immunotherapeutic agents in vivo.

An orthotopic breast cancer primary tumor model and surgical removal of primary tumor to extend mouse life to generate spontaneous metastasis are described. The tumor growth and progression are monitored and quantified by luciferase fluorescence imaging.

במודל עכבר orthotopic של שד ספונטני סרטן גרור

Metastasis is the primary cause of mortality of breast cancer patients. The mechanism underlying cancer cell metastasis, including breast cancer ...

Intravital Microscopy and Thrombus Induction in the Earlobe of a Hairless Mouse

Thrombotic complications of vascular diseases are one leading cause of morbidity and mortality in industrial nations. Due to the complex interactions between cellular and non-cellular blood components during thrombus formation, reliable studies of the physiology and pathophysiology of thrombosis can only be performed in vivo. Therefore, this article presents an ear model in hairless mice and focuses on the in vivo analysis of microcirculation, thrombus formation, and thrombus evolution. By using intravital fluorescence microscopy and the intravenous (iv) application of the respective fluorescent dyes, a repetitive analysis of microcirculation in the auricle can easily be performed, without the need for surgical preparation. Furthermore, this model can be adapted for in vivo studies of different issues, including wound healing, reperfusion injury, or angiogenesis. In summary, the ear of hairless mice is an ideal model for the in vivo study of skin microcirculation in physiological or pathophysiological conditions and for the evaluation of its reaction to different systemic or topical treatments.

The ear model of the hairless SKH1-Hrhr mouse enables intravital fluorescence microscopy of microcirculation and phototoxic thrombus induction without prior surgical preparation in the examined microvascular bed. Therefore, the ear of the hairless mouse is an excellent in vivo model to study the complex interactions during microvascular thrombus formation, thrombus evolution, and thrombolysis.

מיקרוסקופית Intravital ו אינדוקציה פקיק ב התנוך של עכבר חסר שיער

Thrombotic complications of vascular diseases are one leading cause of morbidity and mortality in industrial nations. Due to the complex interactions ...