ونحن ممتنون للدكتور أندرو هولاندر ديفيس سارة، شومان لي، تيم جنكينز، والدكتور شو Xiangsheng للحصول على مساعدة الخبراء التابعة لها. نعترف دعم الدكتور آن كينيدي. وأيد BCB على الإشعاع التدريب الأحياء المنح C5T32CA009677. وأيد JFD على شهادة بوروز ويلكوم لجائزة علماء الطب (1006792). وأيد JLB على منحة قفير (5 R25 CA140116-03). نود أن نعترف الدكتور ستيف هان التشجيع والدعم الذي ساعد في جعل بحثنا ممكن. نود أيضا أن نشكر جامعة بنسلفانيا واجهة مركز بيو نانو (NBIC) والدكتور دينيس لDischer التشجيع وتعليقات مفيدة. نعترف التصوير الحيوانات الصغيرة مرفق (SAIF) في جامعة ولاية بنسلفانيا لاستخدام مرافقها الأساسية والبصرية MRI / ضوء بارد. تم تطوير هذه التقنيات كجزء من المشاريع التي تدعمها المعاهد الوطنية للصحة (RC1 CA145075 وK08-NS07654801).

<ol>
	<li>Stupp, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Radiotherapy+plus+concomitant+and+adjuvant+temozolomide+for+glioblastoma.">Radiotherapy plus concomitant and adjuvant temozolomide for glioblastoma.</a> N. Engl. J. Med. 352, 987-996 (2005).</li><li>Jacobs, V. L., Valdes, P. A., Hickey, W. F., De Leo, J. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Current+review+of+in+vivo+GBM+rodent+models:+emphasis+on+the+CNS-1+tumour+model.">Current review of in vivo GBM rodent models: emphasis on the CNS-1 tumour model.</a> ASN Neuro. 3, e00063 (2011).</li><li>Shelton, 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=A+novel+pre-clinical+in+vivo+mouse+model+for+malignant+brain+tumor+growth+and+invasion.">A novel pre-clinical in vivo mouse model for malignant brain tumor growth and invasion.</a> J. Neurooncol. 99, 165-176 (2010).</li><li>Brehar, F. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+development+of+xenograft+glioblastoma+implants+in+nude+mice+brain.">The development of xenograft glioblastoma implants in nude mice brain.</a> J. Med. Life. 1, 275-286 (2008).</li><li>Ozawa, T., James, C. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Establishing+Intracranial+Brain+Tumor+Xenografts+With+Subsequent+Analysis+of+Tumor+Growth+and+Response+to+Therapy+using+Bioluminescence+Imaging.">Establishing Intracranial Brain Tumor Xenografts With Subsequent Analysis of Tumor Growth and Response to Therapy using Bioluminescence Imaging.</a> J. Vis. Exp. (41), e1986 (2010).</li><li>Radaelli, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Immunohistopathological+and+neuroimaging+characterization+of+murine+orthotopic+xenograft+models+of+glioblastoma+multiforme+recapitulating+the+most+salient+features+of+human+disease.">Immunohistopathological and neuroimaging characterization of murine orthotopic xenograft models of glioblastoma multiforme recapitulating the most salient features of human disease.</a> Histol. Histopathol. 24, 879-891 (2009).</li><li>Baumann, B. C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Enhancing+the+efficacy+of+drug-loaded+nanocarriers+against+brain+tumors+by+targeted+radiation+therapy.">Enhancing the efficacy of drug-loaded nanocarriers against brain tumors by targeted radiation therapy.</a> , (2012).</li><li>Baumann, B. C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=An+integrated+method+for+reproducible+and+accurate+image-guided+stereotactic+cranial+irradiation+of+brain+tumors+using+the+Small+Animal+Radiation+Research+Platform+(SARRP).">An integrated method for reproducible and accurate image-guided stereotactic cranial irradiation of brain tumors using the Small Animal Radiation Research Platform (SARRP).</a> Transl. Oncol. , (2012).</li><li>Park, S. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=MicroPET/CT+imaging+of+an+orthotopic+model+of+human+glioblastoma+multiforme+and+evaluation+of+pulsed+low-dose+irradiation.">MicroPET/CT imaging of an orthotopic model of human glioblastoma multiforme and evaluation of pulsed low-dose irradiation.</a> Int. J. Radiat. Oncol. Biol. Phys. 80, 885-892 (2011).</li><li>Szentirmai, O. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Noninvasive+bioluminescence+imaging+of+luciferase+expressing+intracranial+U87+xenografts:+correlation+with+magnetic+resonance+imaging+determined+tumor+volume+and+longitudinal+use+in+assessing+tumor+growth+and+antiangiogenic+treatment+effect.">Noninvasive bioluminescence imaging of luciferase expressing intracranial U87 xenografts: correlation with magnetic resonance imaging determined tumor volume and longitudinal use in assessing tumor growth and antiangiogenic treatment effect.</a> Neurosurgery. 58, 365-372 (2006).</li><li>Dinca, E. B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Bioluminescence+monitoring+of+intracranial+glioblastoma+xenograft:+response+to+primary+and+salvage+temozolomide+therapy.">Bioluminescence monitoring of intracranial glioblastoma xenograft: response to primary and salvage temozolomide therapy.</a> J. Neurosurg. 107, 610-616 (2007).</li></ol>

الإعلان عن أي تضارب في المصالح.

طريقة زرع المجسم الخلايا السرطانية في الفئران وصفها في هذه الورقة يولد بتكاثر الأورام التي تلخص نمط معقول والارتشاحي السريع النمو من ورم أرومي دبقي الأشكال السريرية 2، 6-8. وخاصة هذه التقنية مناسبة تماما لتجارب الفئران تقسيمها بالتساوي إلى مجموعات معاملة مختلف...

<table border="1" style=";text-align:right;direction:rtl"><tbody><tr><td> وصف </td><td> مزود </td><td> كتالوج رقم </td><td> تعليقات </td></tr><tr><td> الرقمية فقط لصك التجسيمي ماوس </td><td> Stoelting </td><td> 51730D </td><td> منصة المجسم لزرع الماوس </td></tr><tr><td> الكيتامين / زيلازين </td><td></td><td></td><td> حقن التخدير </td></tr><tr><td> مرهم البيطرية Puralube (العيون) </td><td> Amazon.com </td><td></td><td> لمنع جفاف العينين الماوس، </td></tr><tr><td> حفر حامل لمنصة المجسم </td><td> Stoelting </td><td> 51681 </td><td></td></tr><tr><td> المثقاب الكهربائية محرك صغروي </td><td> Stoelting </td><td> 51449 </td><td> لحفر من خلال الجمجمة </td></tr><tr><td> 0.45 مم كربيد الحفر بت </td><td> Stoelting </td><td> 514551 </td><td></td></tr><tr><td> مسحات القطن المعقمة </td><td> فيشر العلمية </td><td> 23-400-100 </td><td></td></tr><tr><td> الزجاج حبة تعقيم جاف (Germinator 500) </td><td> برينتري العلمية </td><td> GER-5287 </td><td> لتعقيم الأدوات المعدنية الجراحية </td></tr><tr><td> الماوس المستقيم التحقيق </td><td> برينتري العلمية </td><td> RET-3-ISO </td><td> متوافق مع تحكم في درجة الحرارة </td></tr><tr><td> تحكم في درجة الحرارة (TCAT-2DF) </td><td> جهاز هارفارد </td><td> 727561 </td><td> تحكم في درجة الحرارة للحفاظ على درجة حرارة الحيوان خلال عملية جراحية </td></tr><tr><td> لوحة صغيرة التدفئة </td><td> جهاز هارفارد </td><td> 727617 </td><td> للاستخدام مع تحكم في درجة الحرارة لتدفئة الماوس أثناء الجراحة. لوحة التدفئة يناسب تحت الماوس على منصة التجسيمي. </td></tr><tr><td> المتاح المباضع </td><td> BD-بارد باركر </td><td> 2015-11 </td><td> # 10 مشرط </td></tr><tr><td> 10 ميكروليتر حقنة </td><td> هاميلتون </td><td> 7635-01 </td><td> للحقن من الخلايا السرطانية </td></tr><tr><td> الإبر قياس 30، 1 &quot;طويلة، مع نقطة ثابتة </td><td> هاميلتون </td><td> مختلف </td><td> يجب أن تكون متوافقة مع الحقنة 10 ميكرولتر </td></tr><tr><td> Nanomite برمجة مضخة الحقنة </td><td> جهاز هارفارد </td><td> 704507 </td><td> حقنة آلية الرقمية حاقن للجهاز التجسيمي </td></tr><tr><td> السليلوز الإسفنج معقمة الرمح الجراحية </td><td> Ultracell </td><td> 40410 </td><td> لتجفيف الجراحي الميداني </td></tr><tr><td> الشمع العظام </td><td> Ethicon </td><td> W31 </td><td> لاغلاق ثقب لدغ </td></tr><tr><td> Tissumend II الاصطناعية لاصقة امتصاص الأنسجة </td><td> منتجات بيطرية المختبرات </td><td> 3002931 </td><td> لختم الجرح </td></tr><tr><td> مضخة مياه ساخنة مع لوحة الاحترار </td><td> Gaymaص </td><td> TP-650 </td><td> ارتفاع درجة حرارة الفئران في فترة ما بعد الجراحة </td></tr><tr><td> IVIS ومينا II </td><td> الفرجار علوم الحياة </td><td></td><td> تصوير Bioluminescent </td></tr><tr><td> D-وسيفيرين البوتاسيوم الملح </td><td> الذهب التكنولوجيا الحيوية </td><td> LUCK-1 </td><td> وسيفيرين للتصوير bioluminescent </td></tr></tbody></table>

stereotactic intracranial implantation and in vivo bioluminescent imaging of tumor xenografts in a mouse model system of glioblastoma multiforme

ورم أرومي دبقي الأشكال (GBM) هو عالي الجودة سرطان الدماغ الأولية مع بقاء متوسط ​​فقط 14.6 شهر في البشر على الرغم من العلاج ثلاثي طريقة القياسية التي تتكون من استئصال الجراحي، ما بعد الجراحة والعلاج الإشعاعي العلاج الكيميائي temozolomide 1. هناك حاجة واضحة النهج العلاجي الجديد لتحسين بقاء المريض ونوعية الحياة. ويمكن ان يدعم تطوير استراتيجيات أكثر علاج فعال من نماذج حيوانية من أن ألخص GBM الأمراض التي تصيب البشر حتى الآن السماح التصوير المسلسل لمراقبة نمو الورم والاستجابة للعلاج. في هذه الورقة، ونحن لدينا لوصف أسلوب غرس المجسم الدقيق الحيوي imageable الخلايا السرطانية GBM في أدمغة الفئران عارية مما أدى إلى ورم الأعضاء المستمدة من الحيوانات أن ألخص المظاهر السريرية الرئيسية للGBM 2. هذه الطريقة تعطي الأورام التي هي قابلة للتكرار وتقع في مواقع التشريحية الدقيقة في الوقت الذي تسمح في مجال التصوير bioluminescent الجسم الحي لرصد متسلسل داخلالجمجمة النمو طعم أجنبي والاستجابة للعلاجات 3-5. وهذا الأسلوب أيضا جيد التحمل من قبل الحيوانات مع المراضة والوفيات المنخفضة المحيطة بالجراحة.

Watch this Scientific Journal Video about Stereotactic Intracranial Implantation and In vivo Bioluminescent Imaging of Tumor Xenografts in a Mouse Model System of Glioblastoma Multiforme at JoVE.com

Stereotactic Intracranial Implantation and In vivo Bioluminescent Imaging of Tumor Xenografts in a Mouse Model System of Glioblastoma Multiforme

وصفنا طريقة متكاملة لغرس ودقيقة المجسم من خلايا ورم أرومي دبقي الأشكال في أدمغة الفئران عارية والمسلسل لاحقة<em&gt; في الجسم الحي</em&gt; التصوير لمراقبة النمو والاستجابة للعلاج من الأعضاء المستمدة من الحيوانات الناتجة.

داخل الجمجمة وزراعة المجسم<em&gt; في الجسم الحي</em&gt; التصوير Bioluminescent من الأعضاء المستمدة من الحيوانات ورم في النظام النموذجي ماوس من الأشكال ورم أرومي دبقي

Glioblastoma multiforme (GBM) is a high-grade primary brain cancer with a median survival of only 14.6 months in humans despite standard tri-modality ...

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Stereotactic Intracranial Implantation and In vivo Bioluminescent Imaging of Tumor Xenografts in a Mouse Model System of Glioblastoma Multiforme

25.4K Views.  University of Pennsylvania. وصفنا طريقة متكاملة لغرس ودقيقة المجسم من خلايا ورم أرومي دبقي الأشكال في أدمغة الفئران عارية والمسلسل لاحقة في الجسم الحي التصوير لمراقبة النمو والاستجابة للعلاج من الأعضاء المستمدة من الحيوانات الناتجة.

Video: Stereotactic Intracranial Implantation and In vivo Bioluminescent Imaging of Tumor Xenografts in a Mouse Model System of Glioblastoma Multiforme

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.

متعدد الفوتون التصوير من غزو خلايا الورم في الفأر نموذج مثلي الفم سرطان الخلايا الحرشفية

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

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.

في ضوء بارد التصوير حيوية الجسم الحي من نقص الأكسجة ورم من الدماغ الانبثاث سرطان الثدي في نموذج الفأر

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

In vivo Dual Substrate Bioluminescent Imaging

Our understanding of how and when breast cancer cells transit from established primary tumors to metastatic sites has increased at an exceptional rate since the advent of in vivo bioluminescent imaging technologies 1-3. Indeed, the ability to locate and quantify tumor growth longitudinally in a single cohort of animals to completion of the study as opposed to sacrificing individual groups of animals at specific assay times has revolutionized how researchers investigate breast cancer metastasis. Unfortunately, current methodologies preclude the real-time assessment of critical changes that transpire in cell signaling systems as breast cancer cells (i) evolve within primary tumors, (ii) disseminate throughout the body, and (iii) reinitiate proliferative programs at sites of a metastatic lesion. However, recent advancements in bioluminescent imaging now make it possible to simultaneously quantify specific spatiotemporal changes in gene expression as a function of tumor development and metastatic progression via the use of dual substrate luminescence reactions. To do so, researchers take advantage for two light-producing luciferase enzymes isolated from the firefly (Photinus pyralis) and sea pansy (Renilla reniformis), both of which react to mutually exclusive substrates that previously facilitated their wide-spread use in in vitro cell-based reporter gene assays 4. Here we demonstrate the in vivo utility of these two enzymes such that one luminescence reaction specifically marks the size and location of a developing tumor, while the second luminescent reaction serves as a means to visualize the activation status of specific signaling systems during distinct stages of tumor and metastasis development. Thus, the objectives of this study are two-fold. First, we will describe the steps necessary to construct dual bioluminescent reporter cell lines, as well as those needed to facilitate their use in visualizing the spatiotemporal regulation of gene expression during specific steps of the metastatic cascade. Using the 4T1 model of breast cancer metastasis, we show that the in vivo activity of a synthetic Smad Binding Element (SBE) promoter was decreased dramatically in pulmonary metastasis as compared to that measured in the primary tumor 4-6. Recently, breast cancer metastasis was shown to be regulated by changes within the primary tumor microenvironment and reactive stroma, including those occurring in fibroblasts and infiltrating immune cells 7-9. Thus, our second objective will be to demonstrate the utility of dual bioluminescent techniques in monitoring the growth and localization of two unique cell populations harbored within a single animal during breast cancer growth and metastasis.

In vivo Dual Substrate Bioluminescent Imaging

Herein we describe the methods to construct, visualize, and quantify the bioluminescent reactions of both firefly and renilla luciferase enzymes expressed in metastatic breast cancer cells during their growth and metastasis in vivo.

في الجسم الحي التصوير المزدوج الركيزة Bioluminescent

Our understanding of how and when breast cancer cells transit from established primary tumors to metastatic sites has increased at an exceptional rate ...

Intracranial Implantation with Subsequent 3D In Vivo Bioluminescent Imaging of Murine Gliomas

The mouse glioma 261 (GL261) is recognized as an in vivo model system that recapitulates many of the features of human glioblastoma multiforme (GBM). The cell line was originally induced by intracranial injection of 3-methyl-cholantrene into a C57BL/6 syngeneic mouse strain 1; therefore, immunologically competent C57BL/6 mice can be used. While we use GL261, the following protocol can be used for the implantation and monitoring of any intracranial mouse tumor model. GL261 cells were engineered to stably express firefly luciferase (GL261-luc). We also created the brighter GL261-luc2 cell line by stable transfection of the luc2 gene expressed from the CMV promoter. C57BL/6-cBrd/cBrd/Cr mice (albino variant of C57BL/6) from the National Cancer Institute, Frederick, MD were used to eliminate the light attenuation caused by black skin and fur. With the use of albino C57BL/6 mice; in vivo imaging using the IVIS Spectrum in vivo imaging system is possible from the day of implantation (Caliper Life Sciences, Hopkinton, MA). The GL261-luc and GL261-luc2 cell lines showed the same in vivo behavior as the parental GL261 cells. Some of the shared histological features present in human GBMs and this mouse model include: tumor necrosis, pseudopalisades, neovascularization, invasion, hypercellularity, and inflammation 1.
Prior to implantation animals were anesthetized by an intraperitoneal injection of ketamine (50 mg/kg), xylazine (5 mg/kg) and buprenorphine (0.05 mg/kg), placed in a stereotactic apparatus and an incision was made with a scalpel over the cranial midline. A burrhole was made 0.1mm posterior to the bregma and 2.3mm to the right of the midline. A needle was inserted to a depth of 3mm and withdrawn 0.4mm to a depth of 2.6mm. Two &mu;l of GL261-luc or GL261-luc2 cells (107 cells/ml) were infused over the course of 3 minutes. The burrhole was closed with bonewax and the incision was sutured.
Following stereotactic implantation the bioluminescent cells are detectable from the day of implantation and the tumor can be analyzed using the 3D image reconstruction feature of the IVIS Spectrum instrument. Animals receive a subcutaneous injection of 150&mu;g luciferin /kg body weight 20 min prior to imaging. Tumor burden is quantified using mean tumor bioluminescence over time. Tumor-bearing mice were observed daily to assess morbidity and were euthanized when one or more of the following symptoms are present: lethargy, failure to ambulate, hunched posture, failure to groom, anorexia resulting in &gt;10% loss of weight. Tumors were evident in all of the animals on necropsy.

Intracranial Implantation with Subsequent 3D In Vivo Bioluminescent Imaging of Murine Gliomas

Intracranial implantation of GL261 cells into C57BL/6 mice produces malignant gliomas that recapitulate many of the hallmarks of human glioblastoma multiforme. We used GL261 cells stably expressing luciferase to allow us to use in vivo imaging to follow tumor progression. The surgery and 3D in vivo imaging are demonstrated.

زرع داخل القحف مع 3d اللاحقة في فيفو Bioluminescent التصوير الاورام الدبقية الفئران

The mouse glioma 261 (GL261) is recognized as an in vivo model system that recapitulates many of the features of human glioblastoma multiforme (GBM). The ...

Live Imaging of Drug Responses in the Tumor Microenvironment in Mouse Models of Breast Cancer

The tumor microenvironment plays a pivotal role in tumor initiation, progression, metastasis, and the response to anti-cancer therapies. Three-dimensional co-culture systems are frequently used to explicate tumor-stroma interactions, including their role in drug responses. However, many of the interactions that occur in vivo in the intact microenvironment cannot be completely replicated in these in vitro settings. Thus, direct visualization of these processes in real-time has become an important tool in understanding tumor responses to therapies and identifying the interactions between cancer cells and the stroma that can influence these responses. Here we provide a method for using spinning disk confocal microscopy of live, anesthetized mice to directly observe drug distribution, cancer cell responses and changes in tumor-stroma interactions following administration of systemic therapy in breast cancer models. We describe procedures for labeling different tumor components, treatment of animals for observing therapeutic responses, and the surgical procedure for exposing tumor tissues for imaging up to 40 hours. The results obtained from this protocol are time-lapse movies, in which such processes as drug infiltration, cancer cell death and stromal cell migration can be evaluated using image analysis software.

We describe a method for imaging response to anti-cancer treatment in vivo and at single cell resolution.

يعيش التصوير من الاستجابة للأدوية الأورام المكروية في في نماذج الماوس من سرطان الثدي

The tumor microenvironment plays a pivotal role in tumor initiation, progression, metastasis, and the response to anti-cancer therapies. Three-dimensional ...

A Murine Model of Stent Implantation in the Carotid Artery for the Study of Restenosis

Despite the considerable progress made in the stent development in the last decades, cardiovascular diseases remain the main cause of death in western countries. Beside the benefits offered by the development of different drug-eluting stents, the coronary revascularization bears also the life-threatening risks of in-stent thrombosis and restenosis. Research on new therapeutic strategies is impaired by the lack of appropriate methods to study stent implantation and restenosis processes. Here, we describe a rapid and accessible procedure of stent implantation in mouse carotid artery, which offers the possibility to study in a convenient way the molecular mechanisms of vessel remodeling and the effects of different drug coatings.

A model of stent implantation in mouse carotid artery is described. Compared to other similar methods, this procedure is very rapid, simple and accessible, offering the possibility to study in a convenient way the vascular wall reaction to different drug-eluting stents and the molecular mechanisms of restenosis.

نموذج الفئران من زرع دعامات في الشريان السباتي لدراسة عودة التضيق

Despite  the considerable progress made in the stent development in the last decades,  cardiovascular diseases remain the main cause of death in western ...

A Novel High-resolution In vivo Imaging Technique to Study the Dynamic Response of Intracranial Structures to Tumor Growth and Therapeutics

We have successfully integrated previously established Intracranial window (ICW) technology 1-4 with intravital 2-photon confocal microscopy to develop a novel platform that allows for direct long-term visualization of tissue structure changes intracranially. Imaging at a single cell resolution in a real-time fashion provides supplementary dynamic information beyond that provided by standard end-point histological analysis, which looks solely at 'snap-shot' cross sections of tissue.
Establishing this intravital imaging technique in fluorescent chimeric mice, we are able to image four fluorescent channels simultaneously. By incorporating fluorescently labeled cells, such as GFP+ bone marrow, it is possible to track the fate of these cells studying their long-term migration, integration and differentiation within tissue. Further integration of a secondary reporter cell, such as an mCherry glioma tumor line, allows for characterization of cell:cell interactions. Structural changes in the tissue microenvironment can be highlighted through the addition of intra-vital dyes and antibodies, for example CD31 tagged antibodies and Dextran molecules.
Moreover, we describe the combination of our ICW imaging model with a small animal micro-irradiator that provides stereotactic irradiation, creating a platform through which the dynamic tissue changes that occur following the administration of ionizing irradiation can be assessed.
Current limitations of our model include penetrance of the microscope, which is limited to a depth of up to 900 &mu;m from the sub cortical surface, limiting imaging to the dorsal axis of the brain. The presence of the skull bone makes the ICW a more challenging technical procedure, compared to the more established and utilized chamber models currently used to study mammary tissue and fat pads 5-7. In addition, the ICW provides many challenges when optimizing the imaging.

A Novel High-resolution In vivo Imaging Technique to Study the Dynamic Response of Intracranial Structures to Tumor Growth and Therapeutics

We describe a novel in vivo imaging technique that couples fluorescent chimeric mice with intracranial windows and high-resolution 2-photon microscopy. This imaging platform aids studies of dynamic changes in brain tissue and microvasculature, at a single-cell level, following pathological insults and is adaptable to assess intracranial drug delivery and distribution.

رواية عالية الدقة<em&gt; في الجسم الحي</em&gt; تقنية التصوير لدراسة الاستجابة الديناميكية للمنشآت داخل القحف لنمو الورم والتداوي

We have successfully integrated previously established Intracranial window (ICW) technology 1-4 with intravital 2-photon confocal microscopy to develop a ...

In vivo 19F MRI for Cell Tracking

In vivo 19F MRI allows quantitative cell tracking without the use of ionizing radiation. It is a noninvasive technique that can be applied to humans. Here, we describe a general protocol for cell labeling, imaging, and image processing. The technique is applicable to various cell types and animal models, although here we focus on a typical mouse model for tracking murine immune cells. The most important issues for cell labeling are described, as these are relevant to all models. Similarly, key imaging parameters are listed, although the details will vary depending on the MRI system and the individual setup. Finally, we include an image processing protocol for quantification. Variations for this, and other parts of the protocol, are assessed in the Discussion section. Based on the detailed procedure described here, the user will need to adapt the protocol for each specific cell type, cell label, animal model, and imaging setup. Note that the protocol can also be adapted for human use, as long as clinical restrictions are met.

In vivo 19F MRI for Cell Tracking

We describe a general protocol for in vivo cell tracking using MRI in a mouse model with ex vivo labeled cells. A typical protocol for cell labeling, image acquisition processing and quantification is included.

في الجسم الحي 19 F التصوير بالرنين المغناطيسي لتتبع الخليوي

In vivo 19F MRI allows quantitative cell tracking without the use of ionizing radiation. It is a noninvasive technique that can be applied to humans. ...

Creating Anatomically Accurate and Reproducible Intracranial Xenografts of Human Brain Tumors

Orthotopic tumor models are currently the best way to study the characteristics of a tumor type, with and without intervention, in the context of a live animal &#8211;&#160;particularly in sites with unique physiological and architectural qualities such as the brain. In vitro and ectopic models cannot account for features such as vasculature, blood brain barrier, metabolism, drug delivery and toxicity, and a host of other relevant factors. Orthotopic models have their limitations too, but with proper technique tumor cells of interest can be accurately engrafted into tissue that most closely mimics conditions in the human brain. By employing methods that deliver precisely measured volumes to accurately defined locations at a consistent rate and pressure, mouse models of human brain tumors with predictable growth rates can be reproducibly created and are suitable for reliable analysis of various interventions. The protocol described here focuses on the technical details of designing and preparing for an intracranial injection, performing the surgery, and ensuring successful and reproducible tumor growth and provides starting points for a variety of conditions that can be customized for a range of different brain tumor models.

The brain is a unique site with qualities that are not well represented by in vitro or ectopic analyses. Orthotopic mouse models with reproducible location and growth characteristics can be reliably created with intracranial injections using a stereotaxic fixation instrument and a low pressure syringe pump.

خلق تشريحيا دقيقة وقابلة للتكرار داخل الجمجمة Xenografts من أورام الدماغ البشري

Orthotopic tumor models are currently the best way to study the characteristics of a tumor type, with and without intervention, in the context of a live ...

Intrauterine Telemetry to Measure Mouse Contractile Pressure In Vivo

A complex integration of molecular and electrical signals is needed to transform a quiescent uterus into a contractile organ at the end of pregnancy. Despite the discovery of key regulators of uterine contractility, this process is still not fully understood. Transgenic mice provide an ideal model in which to study parturition. Previously, the only method to study uterine contractility in the mouse was ex vivo isometric tension recordings, which are suboptimal for several reasons. The uterus must be removed from its physiological environment, a limited time course of investigation is possible, and the mice must be sacrificed. The recent development of radiometric telemetry has allowed for longitudinal, real-time measurements of in vivo intrauterine pressure in mice. Here, the implantation of an intrauterine telemeter to measure pressure changes in the mouse uterus from mid-pregnancy until delivery is described. By comparing differences in pressures between wild type and transgenic mice, the physiological impact of a gene of interest can be elucidated. This technique should expedite the development of therapeutics used to treat myometrial disorders during pregnancy, including preterm labor.

Intrauterine Telemetry to Measure Mouse Contractile Pressure In Vivo

This manuscript provides a protocol for implanting telemeters in the mouse for the purpose of measuring intrauterine pressures during pregnancy.

القياس عن بعد داخل الرحم لقياس ماوس مقلص الضغط<em&gt; في فيفو</em

A complex integration of molecular and electrical signals is needed to transform a quiescent uterus into a contractile organ at the end of pregnancy. ...