Name: induction of mesenchymal-epithelial transitions in sarcoma cells
Uploaded: 2017-04-07T15:00:00
Description: Watch this Scientific Journal Video about Induction of Mesenchymal-Epithelial Transitions in Sarcoma Cells at JoVE.com

JAS acknowledges support from the Duke Cancer Institute, The Duke University Genitourinary Oncology Laboratory, and the Duke University Department of Orthopaedics. HL was supported by the National Science Foundation (NSF) Center for Theoretical Biological Physics (NSF PHY-1427654) and NSF DMS-1361411, and as a CPRIT (Cancer Prevention and Research Institute of Texas) Scholar in Cancer Research of the State of Texas at Rice University. KEW was supported by the NIH F32 CA192630 MKJ and HL benefited from useful discussions with Mary C. Farach-Carson, J. N. Onuchic, Samir M. Hanash, Kenneth J. Pienta, and Donald S. Coffey.

1. Preparation of Reagents
<ol>
	<li>Prepare DMEM for cell culture by adding 50 mL of fetal bovine serum (FBS) and 5 mL of penicillin-streptomycin (5,000 U/mL) to 500 mL of DMEM. This medium can be stored at 4 &#176;C for up to six months.</li>
	<li>Resuspend lyophilized primers in nuclease-free water to a final concentration of 10 &#181;M. Store re-suspended primers at -20 &#176;C.</li>
	<li>Prepare radioimmunoprecipitation assay (RIPA) buffer (150 mM NaCl, 0.5% sodium deoxycholate, 0.1% SDS, 50 mM Tris, pH 8.0). Supp...

<ol>
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M., Wang, B., Kantharidis, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+role+of+EMT+in+renal+fibrosis.">The role of EMT in renal fibrosis.</a> Cell Tissue Res. 347 (1), 103-116 (2012).</li><li>Willis, B. C., Borok, Z. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=TGF-beta-induced+EMT:+mechanisms+and+implications+for+fibrotic+lung+disease.">TGF-beta-induced EMT: mechanisms and implications for fibrotic lung disease.</a> Am J Physiol Lung Cell Mol Physiol. 293 (3), L525-L534 (2007).</li><li>Ye, X., Weinberg, R. 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Sarcomas are rare, but highly aggressive cancers of a mesenchymal lineage. Despite their mesenchymal lineage, a subset of sarcomas appears to undergo a phenotypic transition to a more epithelial-like state. This MET-like switch has prognostic relevance, as patients with more epithelial-like tumors are less aggressive24. Despite their clinical relevance, there are few studies addressing the molecular mechanisms driving these phenotypic transitions in sarcomas.
To examine...

An erratum was issued for: <a href="https://www.jove.com/video/55520/induction-of-mesenchymal-epithelial-transitions-in-sarcoma-cells">Induction of Mesenchymal-Epithelial Transitions in Sarcoma Cells</a>. An author name was updated.
One of the authors&#39; names was corrected from:
Shenghan Xu
to:
Shengnan Xu

An erratum was issued for: <a href="https://www.jove.com/video/55520/induction-of-mesenchymal-epithelial-transitions-in-sarcoma-cells">Induction of Mesenchymal-Epithelial Transitions in Sarcoma Cells</a>. An author name was updated.

Erratum: Induction of Mesenchymal-Epithelial Transitions in Sarcoma Cells

Phenotypic plasticity refers to a reversible transition between cellular phenotypes, and is commonly divided into two types, epithelial-to-mesenchymal (EMT) transitions and mesenchymal-to-epithelial transitions (MET). This phenotypic plasticity plays an important role in normal processes of multicellular organisms, such as development and wound healing1; however, these same pathways and gene expression programs can also lead to disease, such as fibrosis (reviewed in2,3,4) and carcinoma metastasis (reviewed in references5,6,7,8). During metastasis, for example, EMT disrupts cell polarity, cell-cell interactions, and promotes invasion9,10. Together, EMT contributes to a phenotypic state that facilitates cancer cell dissemination. In addition, EMT also leads to a host of other phenotypic alterations that drive an aggressive phenotype, including deregulation of cancer cell metabolism6, development of drug resistance11,12, increased tumor-initiation ability13,14 and host immune evasion15.
Phenotypic plasticity has been well studied in carcinoma progression; however, sarcomas also exhibit phenotypic plasticity. Interestingly, it appears as if some of the same drivers of phenotypic plasticity in carcinomas also contribute to sarcoma plasticity and aggressiveness. For instance, circulating tumor cells (CTCs) from sarcoma patients have been shown to express EpCAM, a cell surface protein that is typically found on epithelial cells16. Additionally, 250 soft tissue sarcoma samples were categorized as epithelial-like or mesenchymal-like based on gene expression. Patients in the epithelial-like biomarker signature had a better prognosis than patients with the mesenchymal-like biomarker signature17. This is consistent with many carcinomas, in which patients with more epithelial-like carcinomas have better outcomes compared with patients with more mesenchymal-like tumors18.
While some sarcomas display biomarkers and gene expression pathways consistent with MET, the molecular underpinnings of this phenotypic plasticity remain poorly understood. To study the mechanisms and drivers of MET in sarcoma we developed a model of MET induction using two epithelial-specific factors, the microRNA (miR)-200 family and grainyhead-like 2 (GRHL2). The miR-200s are a family of small non-coding RNAs that regulate gene expression by binding to the 3&#39; UTRs of messenger RNA and preventing translation into protein. The miR-200 family consists of two subgroups - one containing miR-141 and miR-200a, and the other including&#160;miR-200b, miR-200c, and miR-429. Members of the miR-200 family are enriched in epithelial tissues, and the loss of miR-200s is associated with metastasis in carcinomas19. The miR-200 family is also downregulated in soft tissue sarcomas compared to normal tissue20. Similar to the miR-200s, GRHL2 is a key regulator that is important for epithelial development21. The GRHL2 transcription factor acts in two ways to upregulate epithelial genes, such as E-cadherin: 1) In epithelial cells, GRHL2 directly represses the EMT master regulator, ZEB122; and 2) GRHL2 directly activates transcription of epithelial genes23. Our previous investigations have shown that combined expression of miR-200s and GRHL2 in sarcoma cells induces an MET-like phenotype24. Here, we present a detailed protocol to create an in vitro model of MET induction in sarcoma cells using ectopic expression of miR-200s and GRHL2.

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>Countess automated counter</td>
			<td>Life technologies</td>
			<td>AMQAX1000</td>
			<td></td>
		</tr>
		<tr>
			<td>Countess cell counting chamber slides</td>
			<td>Invitrogen</td>
			<td>C10283</td>
			<td></td>
		</tr>
		<tr>
			<td>SimpliAmp Thermal Cycler</td>
			<td>Thermo Fisher</td>
			<td>A24811</td>
			<td></td>
		</tr>
		<tr>
			<td>Odyssey Fc</td>
			<td>LI-COR Inc</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>ViiA7 Real Time PCR System</td>
			<td>Thermo Fisher</td>
			<td>4453536</td>
			<td></td>
		</tr>
		<tr>
			<td>PCR microplate</td>
			<td>Corning</td>
			<td>321-29-051</td>
			<td></td>
		</tr>
		<tr>
			<td>KAPA SYBR Fast Universal qPCR Kit</td>
			<td>KAPA Biosystems</td>
			<td>KK4602</td>
			<td></td>
		</tr>
		<tr>
			<td>Starting Block (PBS) Blocking Buffer</td>
			<td>Thermo Fisher</td>
			<td>37538</td>
			<td>BSA-based blocking buffer</td>
		</tr>
		<tr>
			<td>Agarose General Purpose LE</td>
			<td>Genesee Scientific</td>
			<td>20-102</td>
			<td></td>
		</tr>
		<tr>
			<td>10X Tris/Glycine/SDS Buffer</td>
			<td>Bio-Rad Laboratories Inc</td>
			<td>161-0732</td>
			<td>Running buffer</td>
		</tr>
		<tr>
			<td>10X Tris/Glycine Buffer</td>
			<td>Bio-Rad Laboratories Inc</td>
			<td>161-0734</td>
			<td>Transfer buffer</td>
		</tr>
		<tr>
			<td>RIPA Buffer</td>
			<td>Sigma Life Sciences</td>
			<td>SLBG8489</td>
			<td></td>
		</tr>
		<tr>
			<td>Amersham Protran 0.45 &#956;m nitrocellulose</td>
			<td>GE Healthcare Lifesciences</td>
			<td>10600012</td>
			<td></td>
		</tr>
		<tr>
			<td>Quick-RNA MiniPrep Kit</td>
			<td>Genesee Scientific</td>
			<td>11-358</td>
			<td></td>
		</tr>
		<tr>
			<td>Laemmli Sample Buffer (4X)</td>
			<td>Bio-Rad Laboratories Inc</td>
			<td>1610747</td>
			<td></td>
		</tr>
		<tr>
			<td>Mini Trans-Blot Cell</td>
			<td>Bio-Rad Laboratories Inc</td>
			<td>1703930</td>
			<td></td>
		</tr>
		<tr>
			<td>Mini-Protean Tetra Cell</td>
			<td>Bio-Rad Laboratories Inc</td>
			<td>1658005EDU</td>
			<td></td>
		</tr>
		<tr>
			<td>DPBS</td>
			<td>Life technologies</td>
			<td>14190-144</td>
			<td></td>
		</tr>
		<tr>
			<td>0.05% Trypsin-EDTA</td>
			<td>Life technologies</td>
			<td>11995-065</td>
			<td></td>
		</tr>
		<tr>
			<td>DMEM</td>
			<td>Life technologies</td>
			<td>11995-065</td>
			<td></td>
		</tr>
		<tr>
			<td>Lipofectamine RNAi Max</td>
			<td>Thermo Fisher</td>
			<td>13778150</td>
			<td></td>
		</tr>
		<tr>
			<td>Lipofectamine 2000 Ragents</td>
			<td>Thermo Fisher</td>
			<td>11668019</td>
			<td></td>
		</tr>
		<tr>
			<td>Penicillin Streptomycin</td>
			<td>Life technologies</td>
			<td>15140-122</td>
			<td></td>
		</tr>
		<tr>
			<td>miRVana miRNA mimic negative control #1</td>
			<td>Thermo Fisher</td>
			<td>4464058</td>
			<td>neg miRNA</td>
		</tr>
		<tr>
			<td>hsa-miR-200 mirVana miRNA mimic</td>
			<td>Thermo Fisher</td>
			<td>4464066</td>
			<td>miR200A</td>
		</tr>
		<tr>
			<td>has-miR-200 mirVana miRNA mimic</td>
			<td>Thermo Fisher</td>
			<td>4404066</td>
			<td>miR200B</td>
		</tr>
		<tr>
			<td>has-miR-200 mirVana miRNA mimic</td>
			<td>Thermo Fisher</td>
			<td>4404066</td>
			<td>miR200C</td>
		</tr>
		<tr>
			<td>Opti-MEM</td>
			<td>Life technologies</td>
			<td>11088-021</td>
			<td>serum-free media</td>
		</tr>
		<tr>
			<td>anti-Ecadherin antibody</td>
			<td>BD Bioscience</td>
			<td>610182</td>
			<td></td>
		</tr>
		<tr>
			<td>anti-beta actin</td>
			<td>Santa Cruz Biotechnology</td>
			<td>sc-69879</td>
			<td></td>
		</tr>
		<tr>
			<td>anti-EpCam</td>
			<td>Ab Serotec</td>
			<td>MCA18706</td>
			<td></td>
		</tr>
		<tr>
			<td>anti-ZO1</td>
			<td>Invitrogen</td>
			<td>402200</td>
			<td></td>
		</tr>
		<tr>
			<td>IRDye 800W</td>
			<td>LI-COR Inc</td>
			<td>925-32210</td>
			<td></td>
		</tr>
		<tr>
			<td>IRDye 680</td>
			<td>LI-COR Inc</td>
			<td>926-32223</td>
			<td></td>
		</tr>
		<tr>
			<td>anti-mouse AlexaFluor 647</td>
			<td>Thermo Fisher</td>
			<td>A211241</td>
			<td></td>
		</tr>
		<tr>
			<td>anti-rabbit AlexaFluor 647</td>
			<td>Thermo Fisher</td>
			<td>ab150075</td>
			<td></td>
		</tr>
		<tr>
			<td>Halt Protease and Phosphatesse Inhibitor</td>
			<td>Thermo Fisher</td>
			<td>1861281</td>
			<td></td>
		</tr>
		<tr>
			<td>Precision Plus Protein Dual Color</td>
			<td>Bio-Rad Laboratories Inc</td>
			<td>161-0374</td>
			<td></td>
		</tr>
		<tr>
			<td>Partec CellTrics</td>
			<td>Sysmex</td>
			<td>04-004-2326</td>
			<td>30 &#956;m filter for flow</td>
		</tr>
		<tr>
			<td>GAPDH-F</td>
			<td>IDT</td>
			<td></td>
			<td>AGCCACATCGCTCAGACAC</td>
		</tr>
		<tr>
			<td>GAPDH-R</td>
			<td>IDT</td>
			<td></td>
			<td>GCCCAATACGACCAAATCC</td>
		</tr>
		<tr>
			<td>Ecadherin-F</td>
			<td>IDT</td>
			<td></td>
			<td>TGGAGGAATTCTTGCTTTGC</td>
		</tr>
		<tr>
			<td>Ecadherin-R</td>
			<td>IDT</td>
			<td></td>
			<td>CGCTCTCCTCCGAAGAAAC</td>
		</tr>
		<tr>
			<td>ZEB1-F</td>
			<td>IDT</td>
			<td></td>
			<td>GCATACAGAACCCAACTTGAACGTC</td>
		</tr>
		<tr>
			<td>ZEB1-R</td>
			<td>IDT</td>
			<td></td>
			<td>CGATTACACCCAGACTGC</td>
		</tr>
		<tr>
			<td>NOTCH-F</td>
			<td>IDT</td>
			<td></td>
			<td>GGCAATCCGAGGACTATGAG</td>
		</tr>
		<tr>
			<td>NOTCH-R</td>
			<td>IDT</td>
			<td></td>
			<td>CTCAGAACGCACTCGTTGAT</td>
		</tr>
		<tr>
			<td>nitro blue tetrazolium&#160;</td>
			<td>Sigma</td>
			<td>N5514</td>
			<td></td>
		</tr>
		<tr>
			<td>hexadimethrine bromide</td>
			<td>Sigma</td>
			<td>H9268</td>
			<td>polybrene</td>
		</tr>
		<tr>
			<td>3 mL syringe</td>
			<td>BD Bioscience</td>
			<td>309657</td>
			<td></td>
		</tr>
		<tr>
			<td>Sterile syringe filter</td>
			<td>VWR</td>
			<td>28145-505</td>
			<td></td>
		</tr>
		<tr>
			<td>5mL polypropylene round-bottom tube</td>
			<td>352063</td>
			<td></td>
			<td>flow cytometry tubes</td>
		</tr>
		<tr>
			<td>High-Capacity cDNA Reverse Transcription Kit</td>
			<td>Thermo Fisher</td>
			<td>4368814</td>
			<td>reverse transcription kit</td>
		</tr>
		<tr>
			<td>4% paraformaldyhyde</td>
			<td>Santa Cruz Biotechnology</td>
			<td>sc-281612</td>
			<td></td>
		</tr>
		<tr>
			<td>Triton-X100</td>
			<td>Sigma</td>
			<td>93443</td>
			<td></td>
		</tr>
		<tr>
			<td>bovine serum albumin</td>
			<td>Sigma</td>
			<td>A7906</td>
			<td></td>
		</tr>
	</tbody>
</table>

induction of mesenchymal-epithelial transitions in sarcoma cells

Phenotypic plasticity refers to a phenomenon in which cells transiently gain traits of another lineage. During carcinoma progression, phenotypic plasticity drives invasion, dissemination and metastasis. Indeed, while most of the studies of phenotypic plasticity have been in the context of epithelial-derived carcinomas, it turns out sarcomas, which are mesenchymal in origin, also exhibit phenotypic plasticity, with a subset of sarcomas undergoing a phenomenon that resembles a mesenchymal-epithelial transition (MET). Here, we developed a method comprising the miR-200 family and grainyhead-like 2 (GRHL2) to mimic this MET-like phenomenon observed in sarcoma patient samples.We sequentially express GRHL2 and the miR-200 family using cell transduction and transfection, respectively, to better understand the molecular underpinnings of these phenotypic transitions in sarcoma cells. Sarcoma cells expressing miR-200s and GRHL2 demonstrated enhanced epithelial characteristics in cell morphology and alteration of epithelial and mesenchymal biomarkers. Future studies using these methods can be used to better understand the phenotypic consequences of MET-like processes on sarcoma cells, such as migration, invasion, metastatic propensity, and therapy resistance.

Schema for MET induction in sarcoma cells
A general timeline for the induction of MET-like changes in sarcoma cells is shown in Figure 1. The protocol begins by transducing GRHL2 (Figure 1A), followed by transfection of the miR-200 family (Figure 1B). GRHL2 or miR-200 family members were not able to impact the appearance of RD cells when expressed alone, but ectopic expression of G...

Watch this Scientific Journal Video about Induction of Mesenchymal-Epithelial Transitions in Sarcoma Cells at JoVE.com

Induction of Mesenchymal-Epithelial Transitions in Sarcoma Cells

We present here a cell culture method for inducing mesenchymal-epithelial transitions (MET) in sarcoma cells based on combined ectopic expression of microRNA-200 family members and grainyhead-like 2 (GRHL2). This method is suitable for better understanding the biological impact of phenotypic plasticity on cancer aggressiveness and treatments.

Phenotypic plasticity refers to a phenomenon in which cells transiently gain traits of another lineage. During carcinoma progression, phenotypic ...

Research

JoVE Journal

Developmental Biology

Direct Induction of Human Neural Stem Cells from Peripheral Blood Hematopoietic Progenitor Cells

Human disease specific neuronal cultures are essential for generating in vitro models for human neurological diseases. However, the lack of access to ...

Direct Induction of Hemogenic Endothelium and Blood by Overexpression of Transcription Factors in Human Pluripotent Stem Cells

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Chondrogenic Differentiation Induction of Adipose-derived Stem Cells by Centrifugal Gravity

Impaired cartilage cannot heal naturally. Currently, the most advanced therapy for defects in cartilage is the transplantation of chondrocytes ...

Directed Differentiation of Primitive and Definitive Hematopoietic Progenitors from Human Pluripotent Stem Cells

One of the major goals for regenerative medicine is the generation and maintenance of hematopoietic stem cells (HSCs) derived from human pluripotent stem ...

Induction of Hypoxia in Living Frog and Zebrafish Embryos

Here, we introduce a novel system for hypoxia induction, which we developed to study the effects of hypoxia in aquatic organisms such as frog and ...

Horizontal Whole Mount: A Novel Processing and Imaging Protocol for Thick, Three-dimensional Tissue Cross-sections of Skin

Processing a tissue of interest to generate a microscopic image that supports a scientific argument can be challenging. The acquisition of high-quality ...

Single-cell Photoconversion in Living Intact Zebrafish

Animal and plant tissue is composed of distinct populations of cells. These cells interact over time to build and maintain the tissue and can cause ...

Computational Analysis of the Caenorhabditis elegans Germline to Study the Distribution of Nuclei, Proteins, and the Cytoskeleton

Computational Analysis of the Caenorhabditis elegans Germline to Study the Distribution of Nuclei, Proteins, and the Cytoskeleton

The Caenorhabditis elegans (C. elegans) germline is used to study several biologically important processes including stem cell development, apoptosis, and ...

Induction and Validation of Cellular Senescence in Primary Human Cells

Cellular senescence is a state of permanent cell cycle arrest activated in response to different damaging stimuli. Activation of cellular senescence is a ...

Induction of Endothelial Differentiation in Cardiac Progenitor Cells Under Low Serum Conditions

Cardiac progenitor cells (CPCs) may have therapeutic potential for cardiac regeneration after injury. In the adult mammalian heart, intrinsic CPCs are ...