We would like to thank Pascal DuBois for proof-reading the article. The authors would also like to thank the personnel of the Animal Facility at Hunter College of The City University of New York. This work was supported by a NIH RCMI grant to Hunter College.

Etik Beyanı Tüm hayvan çalışmaları New York Şehir Üniversitesi Hunter College Kurumsal Hayvan Bakım ve Kullanım Komitesi (IACUC) tarafından onaylanmıştır. Not: Sekiz BALB / c fareleri, bu deneysel prosedür kullanılmıştır. Beş BALB / c fareleri, primer tümör üretmek için 5 x 10 6 BNL 1ME A.7R.1 fare hepatoselüler karsinoma hücreleri ile implante edildi. Herhangi bir nakil Üç BALB / c fareleri, kontroller olarak kullanılmıştır. BNL 1ME A.7R.1 sıçangil olmayan tümörijenik hepatosit hücre çizgisi BNL CL.2 kimyasal dönüştürme ile elde edilen bir murin hepatosellüler karsinom hücre hattıdır. BNL 1ME A.7R.1 Amerikan Tip Kültür Koleksiyonu (ATCC) elde edilmiştir. 1. Ön cerrahi <ol><li> Tüm yaşam ameliyatları sağlıklı için fareler olun. Fareler sağlıklı olduğundan emin olmak için, cilt tenting ile dehidratasyon belirtileri kontrol edin. Hastalık ya da d herhangi bir kanıt ile fareler kullanmayınBu deneylerde istress. </li><li> Onlar kilolu olmayan sağlamak için farelerin tartılır. Ağırlığı en az 16-20 gram olduğundan emin olun. </li><li> Fare başına implantasyon için 5 x 10 6 BNL 1ME A.7R.1 fare HCC hücreleri hazırla: <ol><li> BNL 1ME A.7R.1 fare HCC hücrelerinin% 70 birleşen hücre kültürü çanak - 10 ml&#39;lik% 60 aspire medya. 5 ml PBS ile iki kez yıkanır. Çanak tripsin 2 ml ilave edilir ve 5 dakika boyunca hava ve% 5 CO2 ile nemlendirilmiş bir kuluçka makinesi içinde 37 ° C&#39;de inkübe edin. </li><li> Daha sonra, bir pipet 10 ul 10X büyütmede mikroskop altında hücre sayımı için manuel bir hemasitometre içine hücreleri tripsinize. Dört büyük köşe meydanlarda bulunan hücrelerin toplam sayısını ve toplam hücre sayısına göre seyreltme faktörünü çarpın. Ardından, (ml başına hücreleri) sayılan kareler sayısına göre bölmek ve hücre konsantrasyonu 10 6 ile çarpın. </li><li> Hesaplama kullanarak, steril fare başına 5 milyon hücreleri toplamak1.5 ml mikrosantrifüj tüpleri. 1.5 ml mikrosantrifüj tüpler etiketleyin. </li></ol></li><li> Fosfat tamponlu tuzlu su, 100 ul (PBS) içinde 5 x 10 6 BNL 1ME A.7R.1 fare HCC hücrelerinin yeniden süspanse edin. Cerrahi implantasyon kadar buz üzerinde bu hücreleri tutun. </li><li> Böyle anestezi indüksiyon ve saç kirlenmesini önlemek için steril ekipman ve materyallerden uzak kırpma olarak ameliyata farelerin hazırlanması için gerekli aktiviteleri yapın. </li><li> Ve dakika başına 1 L (yakl.% 2.1) sabit bir konsantrasyonu, bir akış oranında oksijenle birlikte izofluran buharlaştırıcı kullanılarak izofluran teneffüs ettirilerek farelerde, genel anestezi neden. Not: Sistem kendi kendine yeten ve hassas bir buharlaştırıcı, bir oksijen kaynağı ve gaz / anestezik atma için gerekli bir solunum devresine bağlı olan bir aktif karbon filtresi içerir. </li><li> Anestezi, ameliyat sırasında ağrı geçiyor gelen hayvan önlemek için yeterli olduğundan emin olun. Ayak-tutam gerçekleştirin ve non-sorumluluk gibi için hayvan gözlemlemekcilik anestezi onaylayın. </li><li> O zaman, burun konisi vana hattı, mühür kutusuna açık geçiş yapın. </li><li> En kısa sürede fare anestezi olarak, kurutma ve hasardan koruyucu bir önlem olarak kornealara bir göz merhemi küçük bir miktar uygulayın. </li><li> Daha sonra, burun konisi düzgün (bakım anestezi için) yerleştirilir ve bağlı olan, hazırlık alanı hayvan taşımak. Bu hazırlık alanında Depilasyon tarafından ameliyat için cerrahi kesi yeri hazırlayın. </li><li> Cerrahi alan diğer tüm aktivite ücretsiz bir yerde olduğundan emin olun. </li><li> Çalışma yüzeyi sağlam ve uygun dezenfekte, unsoiled ve dağınıklıktan arınmış ameliyattan önce olduğundan emin olun. Keten ya da üzerinde cerrahi tepsi steril parça yerleştirin. </li><li> Operatif alan ameliyatı yapan yalnızca kişilerin mevcut olduğundan emin olun. Cerrahi oda uygun bir dezenfeksiyon ile temizlenmeli ve uygun bir temizleyici ile süpürüldü ve püskürtülür emin olunctant. </li><li> O da uzak kapılar ve hava akımlarından olarak windows konumlandırılmış sitenin kirlenme giden toz yayılabilir emin olun. </li><li> Steril aletler ile hayatta kalma ameliyat gerçekleştirin. Ya üreticinin tavsiyesine veya otoklav göre dezenfektan aletleri ıslatın. Kullanıma hazır olan temel steril malzemeleri kullanın. </li><li> Ayrı araçlar işlevlerine göre steril alanlara bulaşmasını önlemeye yardımcı olur. </li><li> Hayvanın karaciğeri erişmek için kesi (orta hat insizyonu) sitesinde etrafında yaklaşık 1 inç tıraş. Ameliyat bölgesinde uzak hayvandan saç çıkarın. </li><li> Tıraştan sonra sabunlu dezenfektan (betadin cerrahi fırçalayın) alanı fırçalayın ve steril PBS solüsyonu ile aşırı dezenfektan silsin. Yaklaşık 5 dakika süren tüm bodur süreci ile, bu birkaç kez yapın. Çıkarın ve kullanılan eldivenler atılır. </li><li> Daha sonra, bu tür Surgic olarak koruyucu giysi değiştirmekal elbisesi, bodur üst ve yüz maskesi. Sonraki cerrahi eldiven takmadan önce doğru fırçalayın solüsyonu ile eller dezenfekte. Not: Bu dökülme ve potansiyel kirleticiler ile cerrahi siteyi kirlenmesine önlemek için gerekli bir adımdır. </li></ol> 2. Cerrahi <ol><li> Anestezi tüm süre boyunca sıcaklık için bir dış ısı kaynağı sağlar. Anestezi termoregülasyonun bozuklukları neden olduğundan hayvan bazı hipotermi karşılaşabilirsiniz; Bu nedenle, vücut ısısını muhafaza. </li><li> Ameliyat boyunca sırtında fare yerleştirin. </li><li> Cerrahi bantlar parçaları ile ameliyat masasına ön bacaklarda, arka bacaklarda ve fare kuyruğu sabitleyin. </li><li> Xyphisternum düz bir çizgi kesi hemen aşağı olun. </li><li> Karaciğeri maruz steril kendini istinat cerrahi retraktörü kullanın. </li><li> Bir şırınga yavaş ve dikkatli bir 20G iğne sahip olan 5 x 10 6 BNL 1ME A.7R.1 içeren PBS 100 ul enjekteKaraciğerin sağ lobunun içine fare HCC hücreleri. </li><li> İğneyi çıkardıktan sonra, bağlı karaciğer yüksek vaskülarite için herhangi bir potansiyel kanamayı durdurmak için en az 1 dakika süreyle steril bir pamuklu çubuk uygulayın. </li><li> Cerrahi klipleri kullanarak cilt kapatılması ve ardından bir emilebilir sütür ile cilt altı dokusu kapatın. Daha sonra, betadin fırçalayın ile bir kez daha yara temizleyin. Not: Bu cerrahi yaranın kapanmasını sağlayacaktır. </li><li> Subkutan serum fizyolojik 100 ul verir. </li></ol> 3. Post-cerrahi <ol><li> Ameliyattan hemen sonra, fare durumun bakıcıları bildirmek için bir ameliyat sonrası kimlik kartı ile temiz bir kafes fare aktarın. Su ve yiyecek sağlamak. Not: Bizim tecrübelerimize göre, ilk 24 saatlik süre sonrası ameliyat için ıslak yiyecek ve su ile tek başına ev sahipliği eğer sadece en iyi ücret olacak ameliyat geçirmiş bir fare. </li><li> 38 ºC aşarak değil ısı üreten bir ısı lambası ile hayvan sıcak tutun. UFare tamamen iyileşti kadar sıcaklığını ölçmek için bir termometre se. </li><li> Tercihen kağıt yatak ile bir kafes içinde Evi hayvan konfor sağlamak için. </li><li> İlk kurtarma sonra, rahatsızlık, kanama, ağrı ve sıkıntı belirtileri için hayvan izleyin. Ağrı gidermek için buprenorfini (0.05 -0.1 mg / kg) verin. Yakından yaklaşık 2 saat boyunca aktivitesi, davranış ve görünüm, hem de su ve gıda tüketimi izler. Ayaktan ise, farelerin normal, normal konut için geri alan hayvan taşımak ve 24 saat sonrası ameliyat için 6-12 saat aralıklarla izlemeye devam. İsterseniz bir ağırlık kontrolü yapın. </li><li> Hayvan sorunları iyileşirken sahip Ancak, eğer uygun destekleyici bakım eylemleri. Fareler kurtarmak için yapamıyorsanız, insancıl CO 2 boğulma ve servikal dislokasyon yoluyla fareler euthanize. Ötenazi için onaylanan kurumsal yönergeleri izleyin. </li><li> Post-cerrahi, genellikle observab olan HCC klinik kanıt kontrolvücut kondisyon skoru le olarak anlamlı bir azalma. Not: Bu noktada, bir primer tümör olasılıkla karaciğerde gelişmiş ve metastatik yatakları olasılıkla akciğer gelişmiştir. </li><li> Bu noktada, insani ötenazi deneyde yer alan (deney ve kontrol) tüm fareler kurban. Karbon dioksit ile boğularak fareler Konu: çok yavaş 5 -10 dakikalık bir süre boyunca bölme içine karbon dioksitin bırakın. Bu solunum durmasına neden olur. </li></ol>

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The authors declare that they have no competing financial interests.

Bu yazıda yöntemin derinlemesine bir açıklama (Şekil 2) son zamanlarda Ogunwobi ve HCC metastazı ortotopik singeneik fare modeli başarılı kuruluş arkadaşları tarafından rapor edildi verilir 3. Bu prosedür için tümörlerin alım oranı yüksektir. Biz daha önce% 100 3 tümör almak oranı gözlemledik. Ancak, take oranı araştırmacının yetkinlik bağlı değişken olabilir. Eğitim altında yeni bir yüksek lisans öğrencisi tarafından gerçekleştirilen son d...

Hepatocellular carcinoma (HCC) is one of the most lethal cancers, with poor prognosis and low life expectancy. Nearly all cancer-related deaths are due to the metastatic spread of the disease from the originating organ to additional distant organs2-6.HCC progression is a complex process. Therefore, being able to model the tumor microenvironment that is naturally found in metastatic HCC in animal models can prove to be a successful and useful way to reveal relevant mechanisms in humans.7Unfortunately, the mechanisms of cancer metastasis are still largely unclear. Therefore, there is a need to establish animal models that will enable us to elucidate the underlying molecular mechanisms of metastases of cancers such as HCC3,5.
Mouse model systems are a very useful approach for delineating mechanisms and evaluating novel strategies for treatment of metastatic human cancers5,8. The various mouse model systems that presently exist are a testament to efforts of researchers to correctly depict the complexity of the disease5,8,9.
Ogunwobi and colleagues recently used a survival surgical approach to demonstrate establishment of a novel orthotopic syngeneic mouse model for the study of metastasis in HCC3. Their work established a &#8220;patient-like&#8221; mouse model that recapitulates features of aggressive and metastatic HCCs3. They further demonstrated that this mouse model system can be used to study the biology of circulating tumor cells, and that this holds potential for gaining novel insights into the mechanisms of cancer metastasis3.
The aim of this paper is to describe in detail the methodology used in establishing this &#8220;patient-like&#8221; orthotopic syngeneic mouse model of HCC metastasis3. The methodology of how to implant BNL 1ME A.7R.1 mouse HCC cells directly into the liver (the organ of origin) of the inbred wild-type immune competent laboratory mouse strain, BALB/c3 using survival surgery will be described. Unlike other mouse xenograft tumor models where human tumor cells are implanted into immune deficient mice, this system is syngeneic and is, therefore, suitable for studying the role of the immune system in tumor metastasis3,5,8. This approach will likely gain widespread use for studying the mechanisms of metastasis in solid organ cancers.

<table border="0">
	<tbody>
		<tr>
			<td>Micro Dissecting Tweezer&#160;</td>
			<td>Roboz</td>
			<td>(RS-5040)</td>
			<td>Tip .20 x .12mm</td>
		</tr>
		<tr>
			<td>Graefe Micro Dissecting Forceps, serrated curved tip</td>
			<td>Roboz</td>
			<td>(RS-5111)</td>
			<td>1 X 2 teeth, curved tip width 0.6mm</td>
		</tr>
		<tr>
			<td>Micro Dissecting Retractor-Agricola (3 by 3 prongs)</td>
			<td>Roboz</td>
			<td>(RS-6501)</td>
			<td>Blunt 3 X 3 prongs, depth 4mm, spread 25mm</td>
		</tr>
		<tr>
			<td>Micro Dissecting Retractor-Goldstein (3 by 3 prongs)</td>
			<td>Roboz</td>
			<td>(RS-6503)</td>
			<td>Blunt, 3 X 3 prongs, depth 4mm, spread 19mm</td>
		</tr>
		<tr>
			<td>Jameson Caliper (Measures tumors)</td>
			<td>Roboz</td>
			<td>(RS-6466)</td>
			<td>80mm/3 inch scale, chrome plated&#160;</td>
		</tr>
		<tr>
			<td>Micro Dissecting Scissors, large ring sissors, straight and sharp</td>
			<td>Roboz</td>
			<td>(RS-5852)</td>
			<td>23mm blades, length 4 inches, flat shanks and large rings</td>
		</tr>
		<tr>
			<td>Scalpel with blades, for delicate dissecting procedures</td>
			<td>Roboz</td>
			<td>(RS-9861-36)</td>
			<td></td>
		</tr>
		<tr>
			<td>Scalpel handle&#160;</td>
			<td>Roboz</td>
			<td>(RS-9884)</td>
			<td>Solid</td>
		</tr>
		<tr>
			<td>Littauer Stitch Sissors</td>
			<td>Roboz</td>
			<td>(RS-7074)</td>
			<td>Length 4.5 inches</td>
		</tr>
		<tr>
			<td>Brown needle holder, for easy suture tying</td>
			<td>Roboz</td>
			<td>(RS-7960)</td>
			<td>Convex jaw, fine serrations</td>
		</tr>
		<tr>
			<td>Reflex 7MM wound clips with reflex 7 clip applier</td>
			<td>Roboz</td>
			<td>(RS-9262)</td>
			<td>safe, secure alternative method of wound closure</td>
		</tr>
		<tr>
			<td>Instrument tray and lid</td>
			<td>Roboz</td>
			<td>RT-1350S</td>
			<td></td>
		</tr>
		<tr>
			<td>Mini-clipper with detachable blade</td>
			<td>Roboz</td>
			<td>(RS-5903)</td>
			<td></td>
		</tr>
		<tr>
			<td>Germinator 500 (the Germ Terminator) Dry Sterilizer</td>
			<td>Roboz</td>
			<td>Ds-400, Ds-401, DS-501</td>
			<td>For fast decontamination of micro-dissecting instruments.&#160;&#160; Instruments decontaminate within 15 seconds.&#160;</td>
		</tr>
		<tr>
			<td>Microinjection needles</td>
			<td>VWR</td>
			<td>BD305125</td>
			<td>25G Needle</td>
		</tr>
	</tbody>
</table>

a "patient-like" orthotopic syngeneic mouse model of hepatocellular carcinoma metastasis

The majority of cancer-related deaths are caused by the metastasis of the cancer rather than the primary tumor itself. Yet, the underlying mechanisms of cancer metastasis are still unclear. Animal models are essential for elucidating the mechanisms and for evaluating novel strategies for the treatment of metastatic cancers. Here, an in-depth description of a &#8220;patient-like&#8221; orthotopic syngeneic mouse model for exploring the mechanisms of metastasis of solid organ tumors is provided. The survival surgical implantation of BNL 1ME A.7R.1 mouse hepatocellular carcinoma cells directly into the liver (the organ of origin) of the inbred wild-type immune competent laboratory mouse strain, BALB/c is described. The success and reproducibility of this methodology recommends it for widespread use in elucidating the biological mechanisms of solid organ cancer metastasis.

Balb / c fare karaciğerleri 5 x 10 6 BNL 1ME A.7R.1 fare HCC hücrelerinde implante edildi. HCC gelişme Klinik kanıtlar 63 gün ameliyat sonrası gözlemlenebilir oldu. Sonuç olarak, fare insanca kurban edilmiştir. Otopsi Öldürülen farelerin üstünde gerçekleştirilmiştir. Akciğerler ve karaciğer, resekte edilen ve dikkatli bir brüt incelenmesi makroskopik tümörlerin belirlenmesi için gerçekleştirilmiştir. Bir farede, yüzeysel tümör karın duvarı (Şekil 1A) bazı bağ...

Watch this Scientific Journal Video about A "Patient-Like" Orthotopic Syngeneic Mouse Model of Hepatocellular Carcinoma Metastasis at JoVE.com

A &quot;Patient-Like&quot; Orthotopic Syngeneic Mouse Model of Hepatocellular Carcinoma Metastasis

Kanserin metastaz kansere bağlı ölümlerin önemli bir nedenidir. Biz solid organ tümörlerinin metastaz mekanizmaları çalışmak için bir &quot;hasta&quot; gibi ortotopik singenik fare modeli sistemi kurulması için hayatta kalma cerrahi yönteminin derinlemesine bir açıklama sağlar.

Bir &quot;Hasta gibi&quot; Ortotopik singenik Fare Modeli Hepatoselüler karsinomu metastazı

The majority of cancer-related deaths are caused by the metastasis of the cancer rather than the primary tumor itself. Yet, the underlying mechanisms of ...

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Research

JoVE Journal

Medicine

A "Patient-Like" Orthotopic Syngeneic Mouse Model of Hepatocellular Carcinoma Metastasis

12.1K Görüntüleme.  Hunter College of the City University of New York.  Kanserin metastaz kansere bağlı ölümlerin önemli bir nedenidir. Biz solid organ tümörlerinin metastaz mekanizmaları çalışmak için bir "hasta" gibi ortotopik singenik fare modeli sistemi kurulması için hayatta kalma cerrahi yönteminin derinlemesine bir açıklama sağlar. 

Video: A "Patient-Like" Orthotopic Syngeneic Mouse Model of Hepatocellular Carcinoma Metastasis

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.

Oral Skuamöz Hücre Karsinomu Ortotopik Fare Modeli Tümör Hücre Invasion Multi-foton Görüntüleme

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

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In vivo Bioluminescence Imaging of Tumor Hypoxia Dynamics of Breast Cancer Brain Metastasis in a Mouse Model

It is well recognized that tumor hypoxia plays an important role in promoting malignant progression and affecting therapeutic response negatively. There is little knowledge about in situ, in vivo, tumor hypoxia during intracranial development of malignant brain tumors because of lack of efficient means to monitor it in these deep-seated orthotopic tumors. Bioluminescence imaging (BLI), based on the detection of light emitted by living cells expressing a luciferase gene, has been rapidly adopted for cancer research, in particular, to evaluate tumor growth or tumor size changes in response to treatment in preclinical animal studies. Moreover, by expressing a reporter gene under the control of a promoter sequence, the specific gene expression can be monitored non-invasively by BLI. Under hypoxic stress, signaling responses are mediated mainly via the hypoxia inducible factor-1&alpha; (HIF-1&alpha;) to drive transcription of various genes. Therefore, we have used a HIF-1&alpha; reporter construct, 5HRE-ODD-luc, stably transfected into human breast cancer MDA-MB231 cells (MDA-MB231/5HRE-ODD-luc). In vitro HIF-1&alpha; bioluminescence assay is performed by incubating the transfected cells in a hypoxic chamber (0.1% O2) for 24 hr before BLI, while the cells in normoxia (21% O2) serve as a control. Significantly higher photon flux observed for the cells under hypoxia suggests an increased HIF-1&alpha; binding to its promoter (HRE elements), as compared to those in normoxia. Cells are injected directly into the mouse brain to establish a breast cancer brain metastasis model. In vivo bioluminescence imaging of tumor hypoxia dynamics is initiated 2 wks after implantation and repeated once a week. BLI reveals increasing light signals from the brain as the tumor progresses, indicating increased intracranial tumor hypoxia. Histological and immunohistochemical studies are used to confirm the in vivo imaging results. Here, we will introduce approaches of in vitro HIF-1&alpha; bioluminescence assay, surgical establishment of a breast cancer brain metastasis in a nude mouse and application of in vivo bioluminescence imaging to monitor intracranial tumor hypoxia.

In vivo Bioluminescence Imaging of Tumor Hypoxia Dynamics of Breast Cancer Brain Metastasis in a Mouse Model

Bioluminescence imaging of hypoxia inducible factor-1&alpha; activity is applied to monitor intracranial tumor hypoxia development in a breast cancer brain metastasis mouse model.

Meme Kanseri Beyin metastaz tümör Hipoksi Dynamics in vivo Biyoparlaklık Görüntüleme Fare Modeli

It is well recognized that tumor hypoxia plays an important role in promoting malignant progression and affecting therapeutic response negatively. There ...

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.

Bir Ortotopik Fare Beyin Tümörü Modelinde Kombinasyon Radyoterapi

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.

Anaplastik Tiroid Kanseri Ortotopik Fare Modeli

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

Generation of Subcutaneous and Intrahepatic Human Hepatocellular Carcinoma Xenografts in Immunodeficient Mice

In vivo experimental models of hepatocellular carcinoma (HCC) that recapitulate the human disease provide a valuable platform for research into disease pathophysiology and for the preclinical evaluation of novel therapies. We present a variety of methods to generate subcutaneous or orthotopic human HCC xenografts in immunodeficient mice that could be utilized in a variety of research applications. With a focus on the use of primary tumor tissue from patients undergoing surgical resection as a starting point, we describe the preparation of cell suspensions or tumor fragments for xenografting. We describe specific techniques to xenograft these tissues i) subcutaneously; or ii) intrahepatically, either by direct implantation of tumor cells or fragments into the liver, or indirectly by injection of cells into the mouse spleen. We also describe the use of partial resection of the native mouse liver at the time of xenografting as a strategy to induce a state of active liver regeneration in the recipient mouse that may facilitate the intrahepatic engraftment of primary human tumor cells. The expected results of these techniques are illustrated. The protocols described have been validated using primary human HCC samples and xenografts, which typically perform less robustly than the well-established human HCC cell lines that are widely used and frequently cited in the literature. In comparison with cell lines, we discuss factors which may contribute to the relatively low chance of primary HCC engraftment in xenotransplantation models and comment on technical issues that may influence the kinetics of xenograft growth. We also suggest methods that should be applied to ensure that xenografts obtained accurately resemble parent HCC tissues.

Human tumor xenografts in immunodeficient mice are valuable tools to study cancer biology. Specific protocols to generate subcutaneous and intrahepatic xenografts from human hepatocellular carcinoma cells or tumor fragments are described. Liver regeneration induced by partial hepatectomy in recipient mice is presented as a strategy to facilitate intrahepatic engraftment.

Bağışıklık yetersizliği olan farelere subkutan olarak ve intrahepatik insan hepatoselüler karsinoma ksenograftlarının Üretimi

In  vivo experimental models of hepatocellular carcinoma (HCC) that recapitulate  the human disease provide a valuable platform for research into disease  ...

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.

İnsan Prostat Kanser metastaz Ortotopik fare modeli

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  ...

Initiation of Metastatic Breast Carcinoma by Targeting of the Ductal Epithelium with Adenovirus-Cre: A Novel Transgenic Mouse Model of Breast Cancer

Breast cancer is a heterogeneous disease involving complex cellular interactions between the developing tumor and immune system, eventually resulting in exponential tumor growth and metastasis to distal tissues and the collapse of anti-tumor immunity. Many useful animal models exist to study breast cancer, but none completely recapitulate the disease progression that occurs in humans. In order to gain a better understanding of the cellular interactions that result in the formation of latent metastasis and decreased survival, we have generated an inducible transgenic mouse model of YFP-expressing ductal carcinoma that develops after sexual maturity in immune-competent mice and is driven by consistent, endocrine-independent oncogene expression. Activation of YFP, ablation of p53, and expression of an oncogenic form of K-ras was achieved by the delivery of an adenovirus expressing Cre-recombinase into the mammary duct of sexually mature, virgin female mice. Tumors begin to appear 6 weeks after the initiation of oncogenic events. After tumors become apparent, they progress slowly for approximately two weeks before they begin to grow exponentially. After 7-8 weeks post-adenovirus injection, vasculature is observed connecting the tumor mass to distal lymph nodes, with eventual lymphovascular invasion of YFP+ tumor cells to the distal axillary lymph nodes. Infiltrating leukocyte populations are similar to those found in human breast carcinomas, including the presence of &#945;&#946; and &#947;&#948; T cells, macrophages and MDSCs. This unique model will facilitate the study of cellular and immunological mechanisms involved in latent metastasis and dormancy in addition to being useful for designing novel immunotherapeutic interventions to treat invasive breast cancer.

Activation of latent mutations with adenovirus-Cre into the mammary ductal system results in a clinically relevant metastatic breast cancer. Incorporation of a YFP promoter allows tracking of distal metastatic tumor cells. This model is useful to study latent metastasis, anti-tumor immunity, and for designing novel immunotherapies to treat breast cancer.

Meme Kanseri Bir Roman Transgenik Fare Modeli: Adenovirüs-Kretasedekine ile epiteli Hedefleme ile Metastatik Meme Kanseri Başlatma

Breast cancer is a heterogeneous disease involving complex cellular interactions between the developing tumor and immune system, eventually resulting in ...

The In Ovo Chick Chorioallantoic Membrane (CAM) Assay as an Efficient Xenograft Model of Hepatocellular Carcinoma

The chick chorioallantoic membrane (CAM) begins to develop by day 7 after fertilization and matures by day 12. The CAM is naturally immunodeficient and highly vascularized, making it an ideal system for tumor implantation. Furthermore, the CAM contains extracellular matrix proteins such as fibronectin, laminin, collagen, integrin alpha(v)beta3, and MMP-2, making it an attractive model to study tumor invasion and metastasis. Scientists have long taken advantage of the physiology of the CAM by using it as a model of angiogenesis. More recently, the CAM assay has been modified to work as an in vivo xenograft model system for various cancers that bridges the gap between basic in vitro work and more complex animal cancer models. The CAM assay allows for the study of tumor growth, anti-tumor therapies, and pro-tumor molecular pathways in a biologically relevant system that is both cost- and time-effective. Here, we describe the development of CAM xenograft model of hepatocellular carcinoma (HCC) with embryonic survival rates of up to 93% and reliable tumor take leading to growth of three-dimensional, vascularized tumors.

The In Ovo Chick Chorioallantoic Membrane CAM Assay as an Efficient Xenograft Model of Hepatocellular Carcinoma

The chick chorioallantoic membrane (CAM) is immunodeficient and highly vascularized, making it a natural in vivo model of tumor growth and angiogenesis. In this protocol, we describe a reliable method of growing three-dimensional, vascularized hepatocellular carcinoma (HCC) tumors using the CAM assay.

<em&gt; Ovo</emHepatosellüler karsinom Verimli Xenograftlarında Modeli olarak&gt; Piliç Chorioallantoic Membran (CAM) Deneyi

The chick chorioallantoic membrane (CAM) begins to develop by day 7 after fertilization and matures by day 12. The CAM is naturally immunodeficient and ...

Dynamic Contrast Enhanced Magnetic Resonance Imaging of an Orthotopic Pancreatic Cancer Mouse Model

Dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) has been limitedly used for orthotopic pancreatic tumor xenografts due to severe respiratory motion artifact in the abdominal area. Orthotopic tumor models offer advantages over subcutaneous ones, because those can reflect the primary tumor microenvironment affecting blood supply, neovascularization, and tumor cell invasion. We have recently established a protocol of DCE-MRI of orthotopic pancreatic tumor xenografts in mouse models by securing tumors with an orthogonally bent plastic board to prevent motion transfer from the chest region during imaging. The pressure by this board was localized on the abdominal area, and has not resulted in respiratory difficulty of the animals. This article demonstrates the detailed procedure of orthotopic pancreatic tumor modeling using small animals and DCE-MRI of the tumor xenografts. Quantification method of pharmacokinetic parameters in DCE-MRI is also introduced. The procedure described in this article will assist investigators to apply DCE-MRI for orthotopic gastrointestinal cancer mouse models.

The goal of this protocol is to apply dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) for orthotopic pancreatic tumor xenografts in mice. DCE-MRI is a non-invasive method to analyze microvasculature in a target tissue, and useful to assess vascular response in a tumor following a novel therapy.

Ortotopik Pankreas Kanseri Fare Modeli Dinamik Kontrast Geliştirilmiş Manyetik Rezonans Görüntüleme

Dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) has been limitedly used for orthotopic pancreatic tumor xenografts due to severe ...

Orthotopic Implantation and Peripheral Immune Cell Monitoring in the II-45 Syngeneic Rat Mesothelioma Model

The enormous upsurge of interest in immune-based treatments for cancer such as vaccines and immune checkpoint inhibitors, and increased understanding of the role of the tumor microenvironment in treatment response, collectively point to the need for immune-competent orthotopic models for pre-clinical testing of these new therapies. This paper demonstrates how to establish an orthotopic immune-competent rat model of pleural malignant mesothelioma. Monitoring disease progression in orthotopic models is confounded by the internal location of the tumors. To longitudinally monitor disease progression and its effect on circulating immune cells in this and other rat models of cancer, a single tube flow cytometry assay requiring only 25 &#181;l whole blood is described. This provides accurate quantification of seven immune parameters: total lymphocytes, monocytes and neutrophils, as well as the T-cell subsets CD4 and CD8, B-cells and Natural Killer cells. Different subsets of these parameters are useful in different circumstances and models, with the neutrophil to lymphocyte ratio having the greatest utility for monitoring disease progression in the mesothelioma model. Analyzing circulating immune cell levels using this single tube method may also assist in monitoring the response to immune-based treatments and understanding the underlying mechanisms leading to success or failure of treatment.

The generation of an orthotopic rat model of pleural malignant mesothelioma by implantation of II-45 mesothelioma cells into the pleural cavity of immune competent rats is presented. A flow cytometric method to analyze seven immune cell subsets in these animals from a 25 &#181;l&#160;blood sample is also described.

II-45 singenik Rat Mezotelyoma Modelinde Ortotopik Yerleştirilmesi ve Periferik Bağışıklık Hücre İzleme

The enormous upsurge of interest in immune-based treatments for cancer such as vaccines and immune checkpoint inhibitors, and increased understanding of ...