Nous tenons à remercier le personnel de l&#39;installation de tissus sur les marchés publics de l&#39;Université du Minnesota de l&#39;aide pour la collecte des échantillons de tissus des patients. Ce travail a été soutenu par le programme du ministère de la Défense recherche sur le cancer de l&#39;ovaire (OCRP) de OC093424 de Mo, par le Fonds communautaire pour MB Shaver Recherche sur le Cancer Randy, par le Minnesota ovaire Cancer Alliance pour Mo et par le fonds oncologie gynécologique du ministère de MB. Les bailleurs de fonds n&#39;ont joué aucun rôle dans la conception de l&#39;étude, la collecte et l&#39;analyse des données, la décision de publier ou de la préparation du manuscrit.

Déclaration d&#39;éthique Échantillons solides de cancer de l&#39;ovaire ont été obtenus par le Fonds pour l&#39;Université du Minnesota tissus sur les marchés publics (TPF) après Comité Institutional Review Board: Conseil de sujets humains (CISR) approbation. Une. Configuration de réactifs <ol><li> Préparer le milieu complet DMEM en la complétant avec du DMEM 10% FBS, et 100 unités de pénicilline-streptomycine. Stocker le milieu à 4 ° C et chaud à 37 ° C avant de l&#39;utiliser. </li><li> Aliquote dispase II dans des volumes séparés de 5-10 ml pour éviter le gel multiples dégèle et conserver à -20 ° C dans un congélateur sans nonfrost. </li></ol> 2. Collection de tissus <ol><li> Prélever des échantillons solides de cancer de l&#39;ovaire (~ 5 g en taille) au moment de l&#39;intervention chirurgicale à partir des zones macroscopiquement identifiés comme le cancer par un pathologiste. Les échantillons cliniques sont dé-identifiés et enregistrés conformément aux protocoles institutionnels. </li><li> Placer les échantillons dans un stérile, scREW couvercle, le polypropylène spécimens récipient rempli avec 30 ml de PBS glacé. Le transport des spécimens de laboratoire de pathologie chirurgicale au laboratoire de recherche pour le traitement de la glace, et dans les 30 minutes à partir de la collecte de l&#39;échantillon (Figure 1). </li></ol> 3. Traitement des tissus <ol><li> Travailler dans des conditions stériles, transférer les échantillons sur une boîte de Pétri (60 mm x 60 mm) contenant 10 ml de frais, PBS glacé et en utilisant une lame de rasoir stérile, outre les couper en plus petits morceaux possibles (2 mm ou moins) ( Figures 2A et 2B). </li><li> Transférer les tissus hachés dans un tube conique de 15 ml contenant 10 ml d&#39;préchauffé (37 ° C pendant 30 min) dispase II (2,4 U / ml) dans du DMEM et incuber à 5% de CO2 et à 37 ° C pendant 30 min. Pour assurer une digestion optimale des échantillons, agiter manuellement la suspension de cellules toutes les 5 min. </li><li> Après 30 min d&#39;incubation, le transfert (en utilisantune pipette sérologique de 10 ml) de la suspension cellulaire sur un tamis cellulaire (70 um de maille) placé sur le dessus d&#39;un tube conique de 50 ml et d&#39;appliquer une légère pression contre la grille, avec un piston de la seringue. Jeter n&#39;importe quel tissu non dissocié (restant sur le dessus de la maille) et recueillir la suspension cellulaire obtenue dans le tube de 50 ml conique stérile. Centrifuger à 320 g pendant 7 minutes à 4 ° C (figure 3). </li><li> Jeter le surnageant et remettre en suspension le culot cellulaire dans 10 ml de DMEM contenant 10% de FBS. </li><li> Incuber la suspension de cellules dans une boîte de Petri à 5% de CO 2 et 37 ° C (Figure 4). </li><li> Changer le milieu après 24 h de la plaque initiale. Ceci permet d&#39;éliminer les débris cellulaires et la majorité des erythrocytes présents dans la culture. </li><li> Changer le milieu tous les trois jours pendant les deux semaines suivantes, après quoi les cultures de primaire EOC sont prêts pour des applications en aval. </li></ol>

<ol>
	<li>Kurman, R. J., Visvanathan, K., Roden, R., Wu, T. C., Ie M, S. h. i. h. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Early+detection+and+treatment+of+ovarian+cancer:+shifting+from+early+stage+to+minimal+volume+of+disease+based+on+a+new+model+of+carcinogenesis.">Early detection and treatment of ovarian cancer: shifting from early stage to minimal volume of disease based on a new model of carcinogenesis.</a> Am. J. Obstet. Gynecol. 198 (4), 351-356 (2008).</li><li>Kuhn, E., Kurman, R. J., Shih, I. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Ovarian+Cancer+Is+an+Imported+Disease:+Fact+or+Fiction.">Ovarian Cancer Is an Imported Disease: Fact or Fiction.</a> Curr. Obstet. Gynecol. Rep. 1 (1), 1-9 (2012).</li><li>Sarojini, S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Early+detection+biomarkers+for+ovarian.">Early detection biomarkers for ovarian.</a> J. Oncol. , (2012).</li><li>Shepherd, T. G., Theriault, B. L., Campbell, E. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Nachtigal+M.W.+Primary+culture+of+ovarian+surface+epithelial+cells+and+ascites-derived+ovarian+cancer+cells+from+patients.">Nachtigal M.W. Primary culture of ovarian surface epithelial cells and ascites-derived ovarian cancer cells from patients.</a> Nat. Protoc. 1 (6), 2643-2649 (2006).</li><li>Tsao, S. W., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Characterization+of+human+ovarian+surface+epithelial+cells+immortalized+by+human+papilloma+viral+oncogenes+(HPV-E6E7+ORFs).">Characterization of human ovarian surface epithelial cells immortalized by human papilloma viral oncogenes (HPV-E6E7 ORFs).</a> Exp. Cell. Res. 218 (2), 499-507 (1995).</li><li>Auersperg, N., Maines-Bandiera, S. L., Dyck, H. G., Kruk, P. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Characterization+of+cultured+human+ovarian+surface+epithelial+cells:+phenotypic+plasticity+and+premalignant+changes.">Characterization of cultured human ovarian surface epithelial cells: phenotypic plasticity and premalignant changes.</a> Lab. Invest. 71 (4), 510-518 (1994).</li><li>Brewer, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=In+vitro+model+of+normal,+immortalized+ovarian+surface+epithelial+and+ovarian+cancer+cells+for+chemoprevention+of+ovarian+cancer.">In vitro model of normal, immortalized ovarian surface epithelial and ovarian cancer cells for chemoprevention of ovarian cancer.</a> Gynecol. Oncol. 98 (2), 182-192 (2005).</li><li>Sueblinvong, T., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Establishment,+characterization+and+downstream+application+of+primary+ovarian+cancer+cells+derived+from+solid+tumors.">Establishment, characterization and downstream application of primary ovarian cancer cells derived from solid tumors.</a> PLoS One. 7 (11), (2012).</li><li>Rockwell, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=In+vivo-in+vitro+tumour+cell+lines:+characteristics+and+limitations+as+models+for+human+cancer.">In vivo-in vitro tumour cell lines: characteristics and limitations as models for human cancer.</a> Br. J. Cancer Suppl. 41 (4), 118-122 (1980).</li><li>Wong, C., Chen, S. <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,+application+and+limitations+of+breast+cancer+cell+lines+to+study+tamoxifen+and+aromatase+inhibitor+resistance.">The development, application and limitations of breast cancer cell lines to study tamoxifen and aromatase inhibitor resistance.</a> J. Steroid. Biochem. Mol. Biol. 131 (3-5), 83-92 (2012).</li></ol>

Les auteurs n&#39;ont rien à révéler.

Une meilleure compréhension de l&#39;étiologie du cancer de l&#39;ovaire et le développement est crucial pour améliorer les résultats des femmes touchées par cette maladie dévastatrice. Dans ce contexte, l&#39;utilisation d&#39;établi et &quot;disponible dans le commerce&quot; lignée de cellules de cancer de l&#39;ovaire a sans doute été extrêmement utile. Cependant, nous savons aujourd&#39;hui que les lignées cellulaires de cancer ne sont pas représentatifs de la tumeur humaine qu&#39;ils proviennent dans...

Malgré sa faible incidence, le cancer de l&#39;ovaire est le plus meurtrier des maladies gynécologiques et la cinquième cause de décès par cancer chez les femmes 1,2. Ceci est principalement dû à l&#39;absence d&#39;outils et de modèles fiables qui récapitulent fidèlement l&#39;initiation et la progression de la maladie 3. La plupart de nos connaissances d&#39;aujourd&#39;hui sur le cancer de l&#39;ovaire a été possible grâce à l&#39;utilisation de cellules immortalisées ovariennes épithéliales de surface (IOS), des lignées de cellules de cancer de l&#39;ovaire et les cellules cancéreuses ovariennes primaires récupérées à partir du liquide d&#39;ascite 4-7. Malheureusement, leur utilisation présente plusieurs limites, y compris un certain nombre de modifications génétiques et phénotypiques liées au processus d&#39;immortalisation ou dans les passages in vitro et l&#39;hétérogénéité de la population résultant de la préparation fluide ascite. Par conséquent, les cellules ovariennes cancéreuses primaires dérivées à partir d&#39;échantillons solides identifiables et spécifiques d&#39;un cancer de l&#39;ovaire représentent uniquoutil de e pour l&#39;étude de la progression du cancer de l&#39;ovaire. Les principales difficultés rencontrées dans le ces cellules malignes obtention sont dues à une prolifération de cellules stromales ou les fibroblastes avec la perte de la viabilité et de l&#39;absence prématurée de la capacité de prolifération dans la culture de ces cellules COE. Plusieurs méthodes pour créer une seule cellule suspensions de tumeurs solides existent actuellement, par des moyens mécaniques ou dissociation enzymatique, mais certaines techniques donnent une plus grande quantité de la solution privilégiée 8. Ici, nous montrons que la digestion enzymatique à la dispase II entraîne une récupération efficace des cellules de SOE gratuit fibroblastes viables. Les cultures COE ainsi obtenus sont très sensibles à la manipulation génétique et sont également utiles dans des tests de dépistage de drogue, ce qui indique que ces cultures SOE sont adaptés à de nombreuses applications en aval.

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			<td height="40" style="height:40px;">&#160;Screw lid, polypropylene specimen container, sterile (Thermoscientific)</td>
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			<td height="21" style="height:21px;">&#160;Small dissecting scissors, sterile</td>
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			<td style="width:155px;">08-945</td>
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			<td height="40" style="height:40px;">&#160;15 ml conical capped tubes, sterile (BD Falcon)</td>
			<td style="width:125px;">BD, Falcon</td>
			<td align="right" style="width:155px;">352097</td>
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			<td height="40" style="height:40px;">50 ml conical capped tubes, sterile (BD Falcon)</td>
			<td style="width:125px;">BD, Falcon</td>
			<td align="right" style="width:155px;">352027</td>
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			<td height="21" style="height:21px;">&#160;10 ml serological pipette, sterile&#160;</td>
			<td style="width:125px;">Corning</td>
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			<td height="21" style="height:21px;">6 ml syringe plunger, sterile&#160;</td>
			<td style="width:125px;">Tyco Healthcare</td>
			<td align="right" style="width:155px;">8881516911</td>
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			<td height="40" style="height:40px;">Nylon filter (70 &#956;m ) cell strainer, sterile (BD Falcon)</td>
			<td style="width:125px;">BD Falcon</td>
			<td align="right" style="width:155px;">352350</td>
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			<td height="21" style="height:21px;">5-cm Petri dish, sterile&#160;</td>
			<td style="width:125px;">Corning</td>
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			<td height="21" style="height:21px;"></td>
			<td style="width:125px;"></td>
			<td style="width:155px;"></td>
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			<td height="21" style="height:21px;">10-cm Petri dish, sterile&#160;</td>
			<td style="width:125px;">Corning</td>
			<td align="right" style="width:155px;">430167</td>
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method for obtaining primary ovarian cancer cells from solid specimens

Des outils fiables pour enquêter sur l&#39;initiation de cancer de l&#39;ovaire et la progression sont nécessaires d&#39;urgence. Bien que l&#39;utilisation de lignées de cellules de cancer de l&#39;ovaire reste un outil précieux pour la compréhension du cancer de l&#39;ovaire, leur utilisation a de nombreuses limites. Il s&#39;agit notamment de l&#39;absence d&#39;hétérogénéité et la pléthore de modifications génétiques associées à des passages in vitro prolongée. Ici, nous décrivons une méthode qui permet de créer rapidement des cellules de cancer ovarien primaire forment les échantillons cliniques solides collectés au moment de la chirurgie. Le procédé consiste à soumettre les échantillons cliniques à une digestion enzymatique pendant 30 minutes. La suspension de cellules isolées est autorisé à croître et peut être utilisé pour une application en aval, y compris le criblage de médicaments. L&#39;avantage de l&#39;ovaire primaires des lignées cellulaires de cancer sur des lignées cellulaires de cancer de l&#39;ovaire est établi qu&#39;ils sont représentatifs des échantillons cliniques spécifiques originaux dont ils sont dérivés et peuvent être dérivées de différents sites si primacancer de l&#39;ovaire ry ou métastatique.

Échantillons cliniques fraîches de cancer de l&#39;ovaire sont recueillies après une intervention chirurgicale (figure 1) et coupées en petits morceaux (Figures 2A et 2B) constituant la suspension cellulaire. Cela permet d&#39;obtenir une exposition optimale des spécimens pour le traitement enzymatique. Suspension cellulaire est exposée à une digestion enzymatique et on a incubé à 37 ° C pendant 30 min. Au cours de la période d&#39;incubation de la suspension...

Watch this Scientific Journal Video about Method for Obtaining Primary Ovarian Cancer Cells From Solid Specimens at JoVE.com

Method for Obtaining Primary Ovarian Cancer Cells From Solid Specimens

Cette étude décrit un procédé détaillé pour l&#39;isolement et la caractérisation de cellules de cancer ovarien primaire à partir de spécimens cliniques solides. Spécimens cliniques sur le cancer de l&#39;ovaire sont soumis à une digestion enzymatique pour obtenir viable, libre fibroblastes cancer épithélial de l&#39;ovaire (COE) de cellules très approprié pour des applications en aval.

Méthode pour l&#39;obtention de cellules cancéreuses ovariennes primaires à partir d&#39;échantillons solides

Reliable tools for investigating ovarian cancer initiation and progression are urgently needed. While the use of ovarian cancer cell lines remains a ...

method-for-obtaining-primary-ovarian-cancer-cells-from-solid-specimens

Research

JoVE Journal

Medicine

13.4K vues.  University of Minnesota.  Cette étude décrit un procédé détaillé pour l'isolement et la caractérisation de cellules de cancer ovarien primaire à partir de spécimens cliniques solides. Spécimens cliniques sur le cancer de l'ovaire sont soumis à une digestion enzymatique pour obtenir viable, libre fibroblastes cancer épithélial de l'ovaire (COE) de cellules très approprié pour des applications en aval. 

Vidéo: Method for Obtaining Primary Ovarian Cancer Cells From Solid Specimens

Method for Novel Anti-Cancer Drug Development using Tumor Explants of Surgical Specimens

The current therapies for malignant glioma have only palliative effect. For therapeutic development, one hurdle is the discrepancy of efficacy determined by current drug efficacy tests and the efficacy on patients. Thus, novel and reliable methods for evaluating drug efficacy are warranted in pre-clinical phase. In vitro culture of tumor tissues, including cell lines, has substantial phenotypic, genetic, and epigenetic alterations of cancer cells caused by artificial environment of cell culture, which may not reflect the biology of original tumors in situ. Xenograft models with the immunodeficient mice also have limitations, i.e., the lack of immune system and interspecies genetic and epigenetic discrepancies in microenvironment. Here, we demonstrate a novel method using the surgical specimens of malignant glioma as undissociated tumor blocks to evaluate treatment effects. To validate this method, data with the current first-line chemotherapeutic agent, temozolomide (TMZ), are described.


We used the freshly-removed surgical specimen of malignant glioma for our experiments. We performed intratumoral injection of TMZ or other drug candidates, followed by incubation and analysis on surgical specimens. Here, we sought to establish a tumor tissue explant method as a platform to determine the efficacy of novel anti-cancer therapies so that we may be able to overcome, at least, some of the current limitations and fill the existing gap between the current experimental data and the efficacy on an actual patient's tumor. This method may have the potential to accelerate identifying novel chemotherapeutic agents for solid cancer treatment.

Here, we established a method for drug efficacy testing with surgical specimens of brain tumors, termed &#x201C;tumor explant method&#x201D;. With this method, we can evaluate drug efficacy without breaking the microenvironment of solid tumors. To validate reliability of this method, we describe representative data with our glioma specimen treated with the current first-line chemotherapeutic agent, temozolomide.

Méthode pour le développement de nouveaux médicaments anti-cancer en utilisant des explants des tumeurs des spécimens chirurgicaux


The current therapies for malignant glioma have only palliative effect. For therapeutic development, one hurdle is the discrepancy of efficacy determined ...

Recherche

Médecine

Time-lapse Imaging of Primary Preneoplastic Mammary Epithelial Cells Derived from Genetically Engineered Mouse Models of Breast Cancer

Time-lapse imaging can be used to compare behavior of cultured primary preneoplastic mammary epithelial cells derived from different genetically engineered mouse models of breast cancer. For example, time between cell divisions (cell lifetimes), apoptotic cell numbers, evolution of morphological changes, and mechanism of colony formation can be quantified and compared in cells carrying specific genetic lesions. Primary mammary epithelial cell cultures are generated from mammary glands without palpable tumor. Glands are carefully resected with clear separation from adjacent muscle, lymph nodes are removed, and single-cell suspensions of enriched mammary epithelial cells are generated by mincing mammary tissue followed by enzymatic dissociation and filtration. Single-cell suspensions are plated and placed directly under a microscope within an incubator chamber for live-cell imaging. Sixteen 650 &mu;m x 700 &mu;m fields in a 4x4 configuration from each well of a 6-well plate are imaged every 15 min for 5 days. Time-lapse images are examined directly to measure cellular behaviors that can include mechanism and frequency of cell colony formation within the first 24 hr of plating the cells (aggregation versus cell proliferation), incidence of apoptosis, and phasing of morphological changes. Single-cell tracking is used to generate cell fate maps for measurement of individual cell lifetimes and investigation of cell division patterns. Quantitative data are statistically analyzed to assess for significant differences in behavior correlated with specific genetic lesions.

Time-lapse imaging is used to assess behavior of primary preneoplastic mammary epithelial cells derived from genetically engineered mouse models of breast cancer risk to determine if there are correlations between specific behavioral parameters and distinct genetic lesions.

Imagerie time-lapse de primaires prénéoplasiques cellules épithéliales mammaires issues de modèles de souris génétiquement modifiées de cancer du sein

Time-lapse  imaging can be used to compare behavior of cultured primary preneoplastic  mammary epithelial cells derived from different genetically ...

A Sensitive Method to Quantify Senescent Cancer Cells

Human cells do not indefinitely proliferate. Upon external and/or intrinsic cues, cells might die or enter a stable cell cycle arrest called senescence. Several cellular mechanisms, such as telomere shortening and abnormal expression of mitogenic oncogenes, have been shown to cause senescence. Senescence is not restricted to normal cells; cancer cells have also been reported to senesce.
	Chemotherapeutical drugs have been shown to induce senescence in cancer cells. However, it remains controversial whether senescence prevents or promotes tumorigenesis. As it might eventually be patient-specific, a rapid and sensitive method to assess senescence in cancer cell will soon be required.
	To this end, the standard &beta;-galactosidase assay, the currently used method, presents major drawbacks: it is time consuming and not sensitive. We propose here a flow cytometry-based assay to study senescence on live cells. This assay offers the advantage of being rapid, sensitive, and can be coupled to the immunolabeling of various cellular markers.

Whether senescence prevents or promotes tumorigenesis remains controversial. Since chemotherapeutical drugs can induce cancer cells to senesce, studying senescence is essential for proposing new therapies. However, the standard and broadly used &beta;-galactosidase assay presents major drawbacks. We propose here a rapid and sensitive flow cytometry-based assay to quantify senescence.

Une méthode sensible pour quantifier les cellules sénescentes du cancer

Human cells do not indefinitely proliferate. Upon external and/or intrinsic  cues, cells might die or enter a stable cell cycle arrest called senescence. ...

Isolation of Cancer Stem Cells From Human Prostate Cancer Samples

The cancer stem cell (CSC) model has been considerably revisited over the last two decades. During this time CSCs have been identified and directly isolated from human tissues and serially propagated in immunodeficient mice, typically through antibody labeling of subpopulations of cells and fractionation by flow cytometry. However, the unique clinical features of prostate cancer have considerably limited the study of prostate CSCs from fresh human tumor samples. We recently reported the isolation of prostate CSCs directly from human tissues by virtue of their HLA class I (HLAI)-negative phenotype. Prostate cancer cells are harvested from surgical specimens and mechanically dissociated. A cell suspension is generated and labeled with fluorescently conjugated HLAI and stromal antibodies. Subpopulations of HLAI-negative cells are finally isolated using a flow cytometer. The principal limitation of this protocol is the frequently microscopic and multifocal nature of primary cancer in prostatectomy specimens. Nonetheless, isolated live prostate CSCs are suitable for molecular characterization and functional validation by transplantation in immunodeficient mice.

The isolation of cancer stem cells (CSCs) directly from human tissues is requisite for their biological characterization. This manuscript describes a methodology for the isolation of prostate CSCs from human tissues, while also providing tips on troubleshooting difficult steps.

Isolement de cellules souches du cancer à partir d&#39;échantillons cancer de la prostate humaine

The cancer stem cell (CSC) model has been considerably revisited over the last two decades. During this time CSCs have been identified and directly ...

Two Methods for Establishing Primary Human Endometrial Stromal Cells from Hysterectomy Specimens

Many efforts have been devoted to establish in vitro cell culture systems. These systems are designed to model a vast number of in vivo processes. Cell culture systems arising from human endometrial samples are no exception. Applications range from normal cyclic physiological processes to endometrial pathologies such as gynecological cancers, infectious diseases, and reproductive deficiencies. Here, we provide two methods for establishing primary endometrial stromal cells from surgically resected endometrial hysterectomy specimens. The first method is referred to as &#8220;the scraping method&#8221; and incorporates mechanical scraping using surgical or razor blades whereas the second method is termed &#8220;the trypsin method.&#8221; This latter method uses the enzymatic activity of trypsin to promote the separation of cells and primary cell outgrowth. We illustrate step-by-step methodology through digital images and microscopy. We also provide examples for validating endometrial stromal cell lines via quantitative real time polymerase chain reactions (qPCR) and immunofluorescence (IF).

Establishing primary endometrial stromal cell culture systems from hysterectomy specimens is a valuable biological technique and a crucial step prior to pursuing a vast array of research aims. Here, we describe two methods used to establish stromal cultures from surgically resected endometrial tissues of human patients.&#160;

Deux méthodes de fixation des cellules humaines de l&#39;endomètre stromales primaires de spécimens hystérectomie

Many efforts have been devoted to establish in vitro cell culture systems. These systems are designed to model a vast number of in vivo processes. Cell ...

Assessment of Ovarian Cancer Spheroid Attachment and Invasion of Mesothelial Cells in Real Time

Ovarian cancers metastasize by shedding into the peritoneal fluid and dispersing to distal sites within the peritoneum. Monolayer cultures do not accurately model the behaviors of cancer cells within a nonadherent environment, as cancer cells inherently aggregate into multicellular structures which contribute to the metastatic process by attaching to and invading the peritoneal lining to form secondary tumors. To model this important stage of ovarian cancer metastasis, multicellular aggregates, or spheroids, can be generated from established ovarian cancer cell lines maintained under nonadherent conditions. To mimic the peritoneal microenvironment encountered by tumor cells in vivo, a spheroid-mesothelial co-culture model was established in which preformed spheroids are plated on top of a human mesothelial cell monolayer, formed over an extracellular matrix barrier. Methods were then developed using a real-time cell analyzer to conduct quantitative real time measurements of the invasive capacity of different ovarian cancer cell lines grown as spheroids. This approach allows for the continuous measurement of invasion over long periods of time, which has several advantages over traditional endpoint assays and more laborious real time microscopy image analyses. In short, this method enables a rapid, determination of factors which regulate the interactions between ovarian cancer spheroid cells invading through mesothelial and matrix barriers over time.

Ovarian cancer cell invasion into the mesothelial lining of the peritoneum is a dynamic process over time. Utilizing a real time analyzer, the invasive capacity of ovarian cancer cells in a spheroid-mesothelial cell co-culture model can be quantified over prolonged time periods, providing insights into factors regulating the metastatic process.

Évaluation de Cancer de l&#39;ovaire Spheroid attachement et l&#39;invasion des cellules mésothéliales en temps réel

Ovarian cancers metastasize by shedding into the peritoneal fluid and dispersing to distal sites within the peritoneum. Monolayer cultures do not ...

Murine Model for Non-invasive Imaging to Detect and Monitor Ovarian Cancer Recurrence

Epithelial ovarian cancer is the most lethal gynecologic malignancy in the United States. Although patients initially respond to the current standard of care consisting of surgical debulking and combination chemotherapy consisting of platinum and taxane compounds, almost 90% of patients recur within a few years. In these patients the development of chemoresistant disease limits the efficacy of currently available chemotherapy agents and therefore contributes to the high mortality. To discover novel therapy options that can target recurrent disease, appropriate animal models that closely mimic the clinical profile of patients with recurrent ovarian cancer are required. The challenge in monitoring intra-peritoneal (i.p.) disease limits the use of i.p. models and thus most xenografts are established subcutaneously. We have developed a sensitive optical imaging platform that allows the detection and anatomical location of i.p. tumor mass. The platform includes the use of optical reporters that extend from the visible light range to near infrared, which in combination with 2-dimensional X-ray co-registration can provide anatomical location of molecular signals. Detection is significantly improved by the use of a rotation system that drives the animal to multiple angular positions for 360 degree imaging, allowing the identification of tumors that are not visible in single orientation. This platform provides a unique model to non-invasively monitor tumor growth and evaluate the efficacy of new therapies for the prevention or treatment of recurrent ovarian cancer.

We describe a non-invasive animal imaging platform that allows the detection, quantification, and monitoring of ovarian cancer growth and recurrence. This intra-peritoneal xenograft model mimics the clinical profile of patients with ovarian cancer.

Modèle murin pour l&#39;imagerie non invasive pour détecter et surveiller l&#39;ovaire récurrence du cancer

Epithelial ovarian cancer is the most lethal gynecologic malignancy in the United States. Although patients initially respond to the current standard of ...

Enrichment for Chemoresistant Ovarian Cancer Stem Cells from Human Cell Lines

Cancer stem cells (CSCs) are defined as a subset of slow cycling and undifferentiated cells that divide asymmetrically to generate highly proliferative, invasive, and chemoresistant tumor cells. Therefore, CSCs are an attractive population of cells to target therapeutically. CSCs are predicted to contribute to a number of types of malignancies including those in the blood, brain, lung, gastrointestinal tract, prostate, and ovary. Isolating and enriching a tumor cell population for CSCs will enable researchers to study the properties, genetics, and therapeutic response of CSCs. We generated a protocol that reproducibly enriches for ovarian cancer CSCs from ovarian cancer cell lines (SKOV3 and OVCA429). Cell lines are treated with 20 &#181;M cisplatin for 3 days. Surviving cells are isolated and cultured in a serum-free stem cell media containing cytokines and growth factors. We demonstrate an enrichment of these purified CSCs by analyzing the isolated cells for known stem cell markers Oct4, Nanog, and Prom1 (CD133) and cell surface expression of CD177 and CD133. The CSCs exhibit increased chemoresistance. This method for isolation of CSCs is a useful tool for studying the role of CSCs in chemoresistance and tumor relapse.

Cancer stem cells (CSCs) are&#160;implicated in tumor relapse due to chemoresistance. We have optimized a protocol for selection and expansion of CSCs from ovarian cancer cell lines. By treating cells with the chemotherapeutic cisplatin and culturing&#160;in a stem cell promoting media we enrich for non-adherent CSC cultures.

Enrichissement pour chimiorésistantes cancer de l&#39;ovaire des cellules souches à partir de lignées cellulaires humaines

Cancer stem cells (CSCs) are defined as a subset of slow cycling and undifferentiated cells that divide asymmetrically to generate highly proliferative, ...

Quantitative Mass Spectrometric Profiling of Cancer-cell Proteomes Derived From Liquid and Solid Tumors

In-depth analyses of cancer cell proteomes are needed to elucidate oncogenic pathomechanisms, as well as to identify potential drug targets and diagnostic biomarkers. However, methods for quantitative proteomic characterization of patient-derived tumors and in particular their cellular subpopulations are largely lacking. Here we describe an experimental set-up that allows quantitative analysis of proteomes of cancer cell subpopulations derived from either liquid or solid tumors. This is achieved by combining cellular enrichment strategies with quantitative Super-SILAC-based mass spectrometry followed by bioinformatic data analysis. To enrich specific cellular subsets, liquid tumors are first immunophenotyped by flow cytometry followed by FACS-sorting; for solid tumors, laser-capture microdissection is used to purify specific cellular subpopulations. In a second step, proteins are extracted from the purified cells and subsequently combined with a tumor-specific, SILAC-labeled spike-in standard that enables protein quantification. The resulting protein mixture is subjected to either gel electrophoresis or Filter Aided Sample Preparation (FASP) followed by tryptic digestion. Finally, tryptic peptides are analyzed using a hybrid quadrupole-orbitrap mass spectrometer, and the data obtained are processed with bioinformatic software suites including MaxQuant. By means of the workflow presented here, up to 8,000 proteins can be identified and quantified in patient-derived samples, and the resulting protein expression profiles can be compared among patients to identify diagnostic proteomic signatures or potential drug targets.

In-depth analyses of cancer cell proteomes facilitate identification of novel drug targets and diagnostic biomarkers. We describe an experimental workflow for quantitative analysis of (phospho-)proteomes in cancer cell subpopulations derived from liquid and solid tumors. This is achieved by combining cellular enrichment strategies with quantitative Super-SILAC-based mass spectrometry.

Spectrométrie de masse quantitative de profilage Protéomes Cancer-cellulaires dérivées de liquide et de tumeurs solides

In-depth analyses of cancer cell proteomes are needed to elucidate oncogenic pathomechanisms, as well as to identify potential drug targets and diagnostic ...

In vitro Enrichment of Ovarian Cancer Tumor-initiating Cells

Evidence suggests that small subpopulations of tumor cells maintain a unique self-renewing and differentiation capacity and may be responsible for tumor initiation and/or relapse. Clarifying the mechanisms by which these tumor-initiating cells (TICs) support tumor formation and progression could lead to the development of clinically favorable therapies. Ovarian cancer is a heterogeneous and highly recurrent disease. Recent studies suggest TICs may play an important role in disease biology. We have identified culture conditions that enrich for TICs from ovarian cancer cell lines. Growing either adherent cells or non-adherent &#8216;floater&#8217; cells in a low attachment plate with serum free media in the presence of growth factors supports the propagation of ovarian cancer TICs with stem cell markers (CD133 and ALDH activity) and increased tumorigenicity without the need to physically separate the TICs from other cell types within the culture. Although the presence of floater cells is not common for all cell lines, this population of cells with innate low adherence may have high tumorigenic potential.Compared to adherent cells grown in the presence of serum, TICs readily form spheres, are significantly more tumorigenic in mice, and express putative stem cell markers. The conditions are easy to establish in a timely manner and can be used to study signaling pathways important for maintaining stem characteristics, and to identify drugs or combinations of drugs targeting TICs. The culture conditions described herein are applicable for a variety of ovarian cancer cells of epithelial origin and will be critical in providing new information about the role of TICs in tumor initiation, progression, and relapse.

In vitro Enrichment of Ovarian Cancer Tumor-initiating Cells

Tumor-initiating cells (TICs) may represent a viable therapeutic target for the treatment of ovarian cancer, a highly recurrent and fatal disease. We present a protocol for culture conditions that enrich for this highly tumorigenic population of cells.

Dans l&#39;Enrichissement vitro du cancer des ovaires cellules initiatrices de tumeurs

Evidence suggests that small subpopulations of tumor cells maintain a unique self-renewing and differentiation capacity and may be responsible for tumor ...