A.S. was partially supported by grants from the National Institutes of Health (NIH) National Institute of Dental and Craniofacial Research (5R03DE021741-02) and the National Cancer Institute (1K08CA154963-01A1).&#160;
The Howard Hughes Medical Institute provided funding for M.L. through the HHMI Medical Research Fellows Program.

1. Yumurta Kuluçka <ol><li> 8 günlük spesifik patojenden serbest embriyolu yumurtaların elde edilir. </li><li> Yumurta tepsisi, yukarı bakacak damgalı biter dönen yumurta yerleştirin ve bir yumurta kuluçka içine döner tepsiye yerleştirin. 36 ° C de 48 saat ve% 50 nem yumurta inkübe edin. </li></ol> 2. CAM Damlama ve Yumurta Açılış <ol><li> Inkübatör yumurta toplamak. Yumurta rafa yerleştirin yumurta, yukarı tarafında damgalı ve laminer akış kaputu getirmek. </li><li> Oda ve kaput ışıkları kapatın. </li><li> CAM damarsal yanı sıra hava kesesi maruz yumurta Candler hafifçe yumurta damgalı ucunu tutun. NOT: Yumurta Candler gelişen embriyo ve ilişkili hava kesesi ve damarsal görselleştirmek için kullanılan bir ışık kaynağıdır. </li><li> Iki büyük kan damarları arasında bir kalem işareti koyun. </li><li> Işıkları açın ve pe hava kesesi (damgalı sonu) Yukarıdaki yumurta ucu ve bir delik, bir delik açmak için steril bir itme pimi kullanınncil işareti. Itme pimini tüm yol boyunca itmeyin; 3 mm çapında bir delik derin genellikle yeterli olacaktır. </li><li> Işıkları kapat. Hava kesesi üzerindeki deliğin karşı sıkıca açık ucu basarak, emniyet ampul sıkın. CAM kalem işareti de uzak kabuk düşmesine neden kalem işaretine deliğe hava çekmek için emme uygulayın. </li><li> Hava kesesi Candler kullanarak kalem işaretli deliğe yumurta damgalı ucundan geçti olmadığını kontrol edin. Değil varsa, emniyet ampul kullanarak emiş yeniden uygulamak ardından iki delik biraz daha derin yapmak ve itme pimi kullanın. </li><li> Işıkları aç. Bağlı bir 15/16 inç cut-off tekerleği ile dremel döner aracı açmak ve kabuk kesmek için sadece yeterince derin iki enine kesimler yapmak ama yeterince derin değil depresif aşağı tüm yol kesmek için, bir yandan yumurta Holding CAM. Birbirinden uzunluğu 2 cm ve 1 cm çapında kesim yapın. 1 cm çapında bir silikon halka geçebilir ve böylece yeterince geniş kesim yapmakStandart seloteyip genişliğinden daha ama daha ince. </li><li> Sonraki hafifçe kabuk kesme tekerleği dokunarak arasında iki enine kesik uçlarında 1 uzunlamasına kesim yapmak. </li><li> Kabuk kabuk parçasının ve paralel altında steril forseps kaydırın. Forseps ile kabuk parçasını alın ve temiz tüm parça kaldırmak. </li><li> Kaldırma kolaylığı için kendi üzerine bir ucunu üzerine kat için emin olun, yeni açılan pencere üzerinde seloteyip yerleştirin. </li><li> Geri inkübatör (NOT dönen yumurta rafları) yumurta tepsisine aşılama zamanına kadar yerleştirin yumurta. </li></ol> 3. Aşılama <ol><li> Örneğin matrigel olarak, bazal membran proteini karışımı tutun buz üzerinde kaputu (polimerizasyonu önlemek için) ve yer. </li><li> 5 dakika boyunca doku kültürü inkübatör - (T75 şişeye başına 5 ml 4) ve yer matara hücreleri ayırmak için 2 mM EDTA kullanın. </li><li> Medyada müstakil hücreleri tekrar süspansiyon ve hemasitometre ve tripan mavisi kullanarak sayın. 500.000 t arası kullanın, CAM üzerine aşılama hücre hattı bağlı için 2.000.000 hücreleri o. Ön deneylerde doğru numarayı optimize edin. </li><li> 5 dakika boyunca 500 xg&#39;de uygun hücre sayısı ve santrifüj için gerekli Tedbir hacmi. </li><li> Süpernatantı atın ve sonra PBS 40 μ l ++ ve bazal membran karışımı 20 μ l hücre pelletini. Not: Hücre / bazal membran karışımı süspansiyon haline resuspending deneyler için gerektiği gibi, bu noktada, hücreler ilaçlar ya da diğer test maddeleri ile muamele edilebilir. Alternatif olarak, ajanlar aşılama sonrası hücre / bazal membran karışımı süspansiyonu pipetle edilebilir. </li><li> Laminer akış kaputu kuvöz ve yerden yumurta yumurta raf al. </li><li> Peel bant pencerenin kapalı, steril forseps kullanarak bir kriyojenik flakon kapaktan 1 mm silikon halka almak ve pencereden halka bırakın. </li><li> Pipet PBS 60 μ l hücre çözümü ++ ve bazal membran Karışımındoğrudan CAM üzerine oturan silikon halkanın ortasına e. </li><li> Yeniden bant pencere ve inkübatör geri yumurta rafı hareket ettirin. Kolayca yerinden hale gelebilir halka ve hücre süspansiyonu olarak yumurta taşırken bu noktada, dikkatli olun. </li><li> Tümörlerin, 5 ila 7 gün boyunca büyümeye izin verin. </li></ol> 4. Hasat Tümörleri <ol><li> Kaputu altında-pad yerleştirin. Histoloji için gerektiği gibi 35 x 10 mm tabak ve paraformaldehit kapları hazırlayın. Her bir 35 x 10 mm levha 1 ml PBS ++ koyun. </li><li> Kaputu biohazard torbası koyun. Steril diseksiyon makas alın ve damgalı sonuna yakın delik yumurtanın içine sivri ucunu. </li><li> Uzunlamasına tüm yumurta etrafında kesin. NOT: halka ile CAM ve tümör penceresi ile kabuk üst yarısında ayrılmamak gerekir. </li><li> Diseksiyon makas ve forseps kullanarak, uzak CAM tümörü incelemek ve 35 x 10 mm plakasındaki tümörü yerleştirin. Tedbir ve tümörler tartın. Paraformaldehy Sabit tümörlerde ve daha sonra Histoloji ve immünohistokimya deneylerinde kullanılmak üzere bunları parafin gömmek. </li></ol> 5. (İsteğe bağlı): Tümör Hücre Ayrılma <ol><li> 35 x 10 mm tabak içinde tümör kıymaya diseksiyon makas kullanın. 15 ml santrifüj tüpüne kıyılmış tümör dökün ve pipetlerle mümkün olduğunca ++ kadar PBS kaldırmak. </li><li> (PBS içinde 1 mg / ml ++) kolajenaz 2 ml ilave edilir, birkaç kez fazla tüp edecek ve (birkaç saate kadar), en az 30 dakika boyunca 37 ° C&#39;de tüp inkübe edin. </li><li> Her tüpe 5 ml medya ekleyin ve aşağı yukarı 20 pipetleme iyice tekrar süspansiyon - 40x. Kapsamlı pipet tam hücre ayrışma için kritik öneme sahiptir. </li><li> Sediment yerleşmek için izin verin ve yeni bir tüp süpernatant aktarın. 5 dakika boyunca 500 x g&#39;de santrifüjleyin. Ayrışmış hücre pelet geride bırakarak, süpernatantı. NOT: Bu noktada, hücre topakları Çeşitli deneyler için kullanılabilir (akış sitometrisi, Western blotting, RNA izolasyonu, vs kullanım için lizis). Toplam tümör hücresi sayısı da bir hemositometre ve tripan mavi boya kullanılarak elde edilebilir. Daha küçük, oval şekilli hücreler tavuk hücreleri CAM ve tümör hücreleri gibi sayılmamalıdır unutmayın. Tümör dikkatlice CAM uzağa disseke ise non-tümör (CAM) hücreleri kirlenmesine neden asgari sayıda olmalıdır. </li></ol>

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A.S.&#160;receives&#160;funding from the Advaxis Pharmaceutical company to support an investigator-initiated clinical trial.&#160;

Bu protokol Çeşitli önemli adımlar büyük olasılıkla gelişmiş embriyonik hayatta yanı sıra tümör büyümesi artan güvenilirlik oluşturmaktadır. Hava kesesi için emme uygulayarak uzak kabuk CAM Damlama (yumurta, künt diseksiyon, vb albümin kaldırmak için bir iğne kullanarak) diğer mevcut yöntemlere göre daha az invaziv. Bu yöntem için gerekli olan iki küçük delik oluşturmak için steril bir itme pimi kullanılarak protokolünün en zor kısmıdır. Çok fazla güç kullanarak raptiye ile a?...

Hepatosellüler karsinom (HCC) Dünyada 1 kanser ölümlerinin 3. önde gelen nedenidir. Şu anda HCC hastalarının sadece% 30 potansiyel küratif cerrahi tedavi 2 için uygundur, ve sistemik kemoterapi 3 etkili değildir. Bu nedenle yeni tedavilere HCC için acil bir karşılanmamış bir klinik ihtiyaç ve yeni maddelerin etkin bir test için uygun bir model sistemlerinde gelişme vardır. Tavuk koriallantoik zar (CAM) tahlili in vivo potansiyel anti-tümör ilaç test üretilebilir, uygun maliyetli ve hızlı, orta hacimli bir yöntem sağlar. CAM tahlil anjiyogenez 4 incelemek için yaygın olarak kullanılır olmuştur. Ayrıca, başarılı bir şekilde glioblastoma 5, pankreas kanseri 6, melanoma 7-9 ve osteosarkom dahil olmak üzere 10-11, kanser, bir tümör ksenograft modeli geliştirilmiştir. Hem ovo 12 ve ex ovo içinde13 teknikleri protokol protokole değişen ayrıntıları literatürde kullanılmıştır. Yüzde 50 11-14 - CAM ksenograft modeli bir büyük zorluk 25 arasında değişen yayınlanan civciv embriyo ölüm oranları ile, yumurta manipülasyonu sonrası embriyonik ölüm nispeten yüksek insidansı. Bu yazıda, güvenilir histolojik farklılaşmamış HCC benzer üç boyutlu, vaskülarize tümörlerin büyümesini üreten HCC ksenograft modelinde ovo bir in gelişimini açıklar. Biz ilk Ossowski ve ark. 14 tarafından açıklanan protokol adapte var ve son derece yüksek tümör engraftment ile% 93&#39;e varan civciv embriyonik sağkalım oranları elde ettik.

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			<td style="width:108px;">Charles River</td>
			<td style="width:119px;">N/A</td>
			<td>http://www.criver.com/files/pdfs/avian/av_c_spf_egg_price_list.aspx</td>
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			<td height="42" style="height:42px;width:401px;">Egg incubators</td>
			<td style="width:108px;">GQF</td>
			<td style="width:119px;">Hova-Bator 2362N</td>
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			<td height="42" style="height:42px;width:401px;">Rotating egg trays</td>
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			<td height="42" style="height:42px;width:401px;">Egg candler</td>
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			<td style="width:108px;">Dremel</td>
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			<td height="21" style="height:21px;width:401px;">Sterile forceps, push pin, dissection scissors, Scotch tape</td>
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			<td style="width:119px;"></td>
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			<td height="21" style="height:21px;width:401px;">Cryogenic vials, external thread with silicone washer</td>
			<td style="width:108px;">Corning</td>
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			<td height="21" style="height:21px;width:401px;">Collagenase from Clostridium histolyticum</td>
			<td style="width:108px;">Sigma</td>
			<td style="width:119px;">C9891</td>
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the in ovo chick chorioallantoic membrane (cam) assay as an efficient xenograft model of hepatocellular carcinoma

Civciv koriyoallantoik membran (CAM) CAM tümör implantasyonu için ideal bir sistem haline doğal bağışık yetmezliği ve çok kanlanan bir gübreleme gün sonra 7 gelişmeye başlar ve 12. gün olgunlaşır. Bundan başka, CAM tümör istilasını ve metastazını, çalışma için çekici bir model verme gibi, fibronektin, laminin, kolajen, integrin alfa (v) beta3 ve MMP-2 gibi hücre dışı matris proteinleri içerir. Bilim adamları uzun zamandır anjiyogenez bir model olarak kullanarak CAM fizyolojisi avantajlarından almış. Daha yakın zamanlarda, CAM assay&#39;dir bazik in vitro çalışma ve daha karmaşık bir hayvan kanser modellerinde arasında bir köprü, muhtelif kanserler bakımından bir in vivo model sisteminde ksenograft olarak çalışmak için modifiye edilmiştir. CAM deneyi maliyet ve zaman etkin bir biçimde kullanılabilir biyolojik ilgili sisteminde tümör büyümesi, anti-tümör terapisi, ve pro-tümör molekül yollarının çalışması için izin verir. Burada, CAM xen gelişimini açıklarkadar% 93 embriyonik sağkalım oranları ve güvenilir tümör hepatosellüler karsinom (HCC) ve ograft modeli üç boyutlu, vaskülarize tümörlerin büyümesine yol açan take.

Protokolde önemli adımlar Temsilcisi resimler burada gösterilmektedir. Şekil 1A gelişen embriyo, hava kesesi ve CAM damarsal görselleştirmek için Candler kullanımını gösterir. Şekil 1B-1C yaparak CAM bırakarak sürecini göstermek iki delik ve ardından güvenlik ampul kullanarak negatif basınç uygulayarak ve Şekil 1D bir başarıyla kalem işaretli delik altında büyük hava kabarcığı ile CAM düştü gösterir. Şekil 1E ve <stron...

Watch this Scientific Journal Video about The In Ovo Chick Chorioallantoic Membrane CAM Assay as an Efficient Xenograft Model of Hepatocellular Carcinoma at JoVE.com

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 ...

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

34.9K Görüntüleme.  Icahn School of Medicine at Mount Sinai. 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.

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

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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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 ...

The In ovo CAM-assay as a Xenograft Model for Sarcoma

Sarcoma is a very rare disease that is heterogeneous in nature, all hampering the development of new therapies. Sarcoma patients are ideal candidates for personalized medicine after stratification, explaining the current interest in developing a reproducible and low-cost xenotransplant model for this disease. The chick chorioallantoic membrane is a natural immunodeficient host capable of sustaining grafted tissues and cells without species-specific restrictions. In addition, it is easily accessed, manipulated and imaged using optical and fluorescence stereomicroscopy. Histology further allows detailed analysis of heterotypic cellular interactions.
This protocol describes in detail the in ovo grafting of the chorioallantoic membrane with fresh sarcoma-derived tumor tissues, their single cell suspensions, and permanent and transient fluorescently labeled established sarcoma cell lines (Saos-2 and SW1353). The chick survival rates are up to 75%. The model is used to study graft- (viability, Ki67 proliferation index, necrosis, infiltration) and host (fibroblast infiltration, vascular ingrowth) behavior. For localized grafting of single cell suspensions, ECM gel provides significant advantages over inert containment materials. The Ki67 proliferation index is related to the distance of the cells from the surface of the CAM and the duration of application on the CAM, the latter determining a time frame for the addition of therapeutic products.

The In ovo CAM-assay as a Xenograft Model for Sarcoma

The in ovo chorioallantoic membrane (CAM) is grafted with fresh sarcoma-derived tumor tissues, their single cell suspensions, and permanent and transient fluorescently labeled established sarcoma cell lines. The model is used to study graft- (viability, Ki67 proliferation index, necrosis, infiltration) and host (fibroblast infiltration, vascular ingrowth) behavior.

<em&gt; Ovo</emSarkoma için bir Xenograftmodel olarak&gt; CAM-testi

Sarcoma is a very rare disease that is heterogeneous in nature, all hampering the development of new therapies. Sarcoma patients are ideal candidates for ...

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  ...

Excitotoxic Stimulation of Brain Microslices as an In vitro Model of Stroke

Examining molecular mechanisms involved in neuropathological conditions, such as ischemic stroke, can be difficult when using whole animal systems. As such, primary or &#39;neuronal-like&#39; cell culture systems are commonly utilized. While&#160;these systems are relatively easy to work with, and are useful model systems in which various functional outcomes (such as cell death) can be readily quantified, the examined outcomes and pathways in cultured immature neurons (such as excitotoxicity-mediated cell death pathways) are not necessarily the same as those observed in mature brain, or in intact tissue. Therefore, there is the need to develop models in which cellular mechanisms in mature neural tissue can be examined. We have developed an in vitro technique that can be used to investigate a variety of molecular pathways in intact nervous tissue. The technique described herein utilizes rat cortical tissue, but this technique can be adapted to use tissue from a variety of species (such as mouse, rabbit, guinea pig, and chicken) or brain regions (for example, hippocampus, striatum, etc.). Additionally, a variety of stimulations/treatments can be used (for example, excitotoxic, administration of inhibitors, etc.). In conclusion, the brain slice model described herein can be used to examine a variety of molecular mechanisms involved in excitotoxicity-mediated brain injury.

Excitotoxic Stimulation of Brain Microslices as an In vitro Model of Stroke

We have developed a brain slice model which can be used to examine molecular mechanisms involved in excitotoxicity-mediated brain injury.&#160;This technique generates viable mature brain tissue and reduces animal numbers required for experimentation, whilst keeping the neuronal circuitry, cellular interactions, and postsynaptic compartments partly intact.

Bir olarak Beyin Microslices arasında excitotoxic uyarılması<em&gt; In vitro</em&gt; İnme Model

Examining molecular mechanisms involved in neuropathological conditions, such as ischemic stroke, can be difficult when using whole animal systems. As ...

Confocal Time Lapse Imaging as an Efficient Method for the Cytocompatibility Evaluation of Dental Composites

It is generally accepted that in vitro cell material interaction is a useful criterion in the evaluation of dental material biocompatibility. The objective of this study was to use 3D CLSM time lapse confocal imaging to assess the in vitro biocompatibility of dental composites. This method provides an accurate and sensitive indication of viable cell rate in contact with dental composite extracts. The ELS extra low shrinkage, a dental composite used for direct restoration, has been taken as example. In vitro assessment was performed on cultured primary human gingival fibroblast cells using Live/Dead staining. Images were obtained with the FV10i confocal biological inverted system and analyzed with the FV10-ASW 3.1 Software. Image analysis showed a very slight cytotoxicity in the presence of the tested composite after 5 hours of time lapse. A slight decrease of cell viability was shown in contact with the tested composite extracts compared to control cells. The findings highlighted the use of 3D CLSM time lapse imaging as a sensitive method to qualitatively and quantitatively evaluate the biocompatibility behavior of dental composites.

The most studied aspect of the biocompatibility of dental composites is their cytotoxicity 3D CLSM time lapse imaging combined with fluorescent signal quantification allows sensitive evaluation of the cell fate over time. Utilizing this method could be an efficient tool to assess the cytocompatibility of dental composites.

Diş Kompozit Cytocompatibility Değerlendirme Verimli Yöntemi olarak Confocal Time Lapse Görüntüleme

It is generally accepted that in vitro cell material interaction is a useful criterion in the evaluation of dental material biocompatibility. The ...

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.

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

The metastatic spread of cancer is the major cause of cancer-related deaths. We provide an in-depth description of our survival surgery methodology for establishing a &#8220;patient-like&#8221; orthotopic syngeneic mouse model system for studying the mechanisms of metastasis in solid organ tumors.

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 ...

Designing CAD/CAM Surgical Guides for Maxillary Reconstruction Using an In-house Approach

Computer-aided design/computer-assisted manufacturing (CAD/CAM) is now being evaluated as a preparative technique for maxillofacial surgery. Because this technique is expensive and available in only limited areas of the world, we developed a novel CAD/CAM surgical guide using an in-house approach. By using the CAD software, the maxillary resection area and cutting planes and the fibular cutting planes and angles are determined. Once the resection area is decided, the necessary faces are extracted using a Boolean modifier. These superficial faces are united to fit the surface of the bones and thickened to stabilize the solids. Not only the cutting guides for the fibula and maxilla but also the location arrangement of the transferred bone segments is defined by thickening the superficial faces. The CAD design is recorded as .stl files and three-dimensionally (3-D) printed as actual surgical guides. To check the accuracy of the guides, model surgery using 3-D-printed facial and fibular models is performed. These methods may be used to assist surgeons where commercial guides are not available.

Methods for designing a computer-aided design/computer-aided manufacturing (CAD/CAM) surgical guide are shown. Cutting planes are separated, united, and thickened to easily visualize the necessary bone transfer. These designs can be three-dimensional printed and checked for accuracy.

CAD/CAM içi bir yaklaşım kullanarak üst yeniden inşası için cerrahi kılavuzları tasarlama

Computer-aided design/computer-assisted manufacturing (CAD/CAM) is now being evaluated as a preparative technique for maxillofacial surgery. Because this ...

Isometric Contractility Measurement of the Mouse Mesenteric Artery Using Wire Myography

The wire myograph technique is used to assess the contractility of vascular smooth muscles in response to depolarization, GPCR agonists/inhibitors and drugs. It is widely used in many studies on the physiological functions of vascular smooth muscle, the pathogenesis of vascular diseases such as hypertension, and the development of smooth muscle relaxant drugs. The mouse is a widely used model animal with a large pool of disease models and genetically modified strains. We introduced this method to measure the isometric contraction of mouse mesenteric artery in detail. A 1.4-mm segment of mouse mesenteric resistance artery was isolated and mounted on a myograph chamber by passing two steel wires through its lumen. After equilibration and normalization steps, the vessel segment was potentiated by a high-K+ solution twice prior to the contraction assay. As an example of the application of this method in drug development, we measured the relaxant effect of a novel natural substance, neoliensinine, isolated from a Chinese herb, embryos of the lotus seed (Nelumbo nucifera Gaertn.) on mouse mesenteric arteries. The vessel segments mounted on the myograph chamber were stimulated with a high-K+ solution. When the force tension reached a stable sustained phase, cumulative doses of neoliensinine were added to the chamber. We found that neoliensinine had a dose-dependent relaxant effect on smooth muscle contraction, thus suggesting that it bears potential activity against hypertension. In addition, as the vessel segment can survive at least 4 hours after mounting and maintain contractility induced by the high-K+ solution for many times, we suggest that the wire myograph system may be used for the time-consuming process of drug screening.

The wire myograph technique is used to investigate vascular smooth muscle functions and screen new drugs. We report a detailed protocol for measuring the isometric contractility of the mouse mesenteric artery and for screening new relaxants of vascular smooth muscle.

İzometrik Contractility ölçüm tel Myography kullanarak fare mezenterik arter

The wire myograph technique is used to assess the contractility of vascular smooth muscles in response to depolarization, GPCR agonists/inhibitors and ...

Predicting Treatment Response to Image-Guided Therapies Using Machine Learning: An Example for Trans-Arterial Treatment of Hepatocellular Carcinoma

Intra-arterial therapies are the standard of care for patients with hepatocellular carcinoma who cannot undergo surgical resection. The objective of this study was to develop a method to predict response to intra-arterial treatment prior to intervention.
The method provides a general framework for predicting outcomes prior to intra-arterial therapy. It involves pooling clinical, demographic and imaging data across a cohort of patients and using these data to train a machine learning model. The trained model is applied to new patients in order to predict their likelihood of response to intra-arterial therapy.
The method entails the acquisition and parsing of clinical, demographic and imaging data from N patients who have already undergone trans-arterial therapies. These data are parsed into discrete features (age, sex, cirrhosis, degree of tumor enhancement, etc.) and binarized into true/false values (e.g., age over 60, male gender, tumor enhancement beyond a set threshold, etc.). Low-variance features and features with low univariate associations with the outcome are removed. Each treated patient is labeled according to whether they responded or did not respond to treatment. Each training patient is thus represented by a set of binary features and an outcome label. Machine learning models are trained using N - 1 patients with testing on the left-out patient. This process is repeated for each of the N patients. The N models are averaged to arrive at a final model.
The technique is extensible and enables inclusion of additional features in the future. It is also a generalizable process that may be applied to clinical research questions outside of interventional radiology. The main limitation is the need to derive features manually from each patient. A popular modern form of machine learning called deep learning does not suffer from this limitation, but requires larger datasets.

Intra-arterial therapies are the standard of care for patients with hepatocellular carcinoma who cannot undergo surgical resection. A method for predicting response to these therapies is proposed. The technique uses pre-procedural clinical, demographic, and imaging information to train machine learning models capable of predicting response prior to treatment.

Makine öğrenimi kullanarak görüntü destekli terapi tedavi öngörmede: hepatosellüler karsinom Trans-arter tedavisi için bir örnek

Intra-arterial therapies are the standard of care for patients with hepatocellular carcinoma who cannot undergo surgical resection. The objective of this ...