Name: spheroid assay to measure tgf-&#946;-induced invasion
Uploaded: 2011-11-16T13:00:00
Description: Watch this Scientific Journal Video about Spheroid Assay to Measure TGF-Î²-induced Invasion at JoVE.com

We are grateful to Ken Iwata (OSI Pharmaceuticals, New York, USA) for reagents and Fred Miller (Barbara Ann Karmanos Cancer Intitute, Detroit, USA) for the cell lines.

1. Preparation of the methocel solution (500 mL)
<ol>
	<li>Autoclave 6 g of methylcellulose in a 500 ml bottle containing a magnetic stirrer.</li>
	<li>Dissolve the methylcellulose in 250 ml of preheated DMEM/F12 without serum (60&deg;C) for 20 min.</li>
	<li>Add 250 ml of DMEM/F12 (RT) containing 10% horse serum. Mix overnight (4&deg;C).</li>
	<li>Clear the solution by centrifugation (5000g, 2h, 4&deg;C).</li>
	<li>Take the clear highly viscous solution to a new tube (about 90-95% of the stock solution).</li>
	<li>Sto...

<ol>
	<li>Akhurst, R. J., Derynck, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=TGF-&#946;+signaling+in+cancer--a+double-edged+sword.">TGF-&#946; signaling in cancer--a double-edged sword.</a> Trends. Cell. Biol. 11, S44-S51 (2001).</li><li>Massagu&#233;, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=TGF-&#946;+in+Cancer.">TGF-&#946; in Cancer.</a> Cell. 134, 215-215 (2008).</li><li>Ghellal, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Prognostic+significance+of+TGF-&#946;1+and+TGF-&#946;+in+human+breast+carcinoma.">Prognostic significance of TGF-&#946;1 and TGF-&#946; in human breast carcinoma.</a> Anticancer. Res. 20, 4413-4413 (2000).</li><li>Sheen-Chen, S. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Serum+levels+of+transforming+growth+factor-&#946;1+in+patients+with+breast+cancer.">Serum levels of transforming growth factor-&#946;1 in patients with breast cancer.</a> Arch. Surg. 136, 937-937 (2001).</li><li>ten Dijke, P., Hill, C. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=New+insights+into+TGF-&#946;-Smad+signaling.">New insights into TGF-&#946;-Smad signaling.</a> Trends Biochem. Sci. 29, 265-265 (2004).</li><li>Moustakas, A., Heldin, C. H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Non-Smad+TGF-&#946;+signals.">Non-Smad TGF-&#946; signals.</a> J. Cell Sci. 118, 3573-3573 (2005).</li><li>Soule, H. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Isolation+and+characterization+of+a+spontaneously+immortalized+human+breast+epithelial+cell+line,+MCF-10.">Isolation and characterization of a spontaneously immortalized human breast epithelial cell line, MCF-10.</a> Cancer Res. 50, 6075-6075 (1990).</li><li>Strickland, L. B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Progression+of+premalignant+MCF10AT+generates+heterogeneous+malignant+variants+with+characteristic+histologic+types+and+immunohistochemical+markers.">Progression of premalignant MCF10AT generates heterogeneous malignant variants with characteristic histologic types and immunohistochemical markers.</a> Breast Cancer Res. Treat. 64, 235-235 (2000).</li><li>Santner, S. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Malignant+MCF10CA1+cell+lines+derived+from+premalignant+human+breast+epithelial+MCF10AT+cells.">Malignant MCF10CA1 cell lines derived from premalignant human breast epithelial MCF10AT cells.</a> Breast Cancer Res. Treat. 65, 101-101 (2001).</li><li>Smalley, K. S., Lioni, M., Herlyn, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Life+isn't+flat:+taking+cancer+biology+to+the+next+dimension.">Life isn't flat: taking cancer biology to the next dimension.</a> In Vitro Cell Dev. Biol. Anim. 42, 242-242 (2006).</li><li>Kobayashi, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Acquired+multicellular-mediated+resistance+to+alkylating+agents+in+cancer.">Acquired multicellular-mediated resistance to alkylating agents in cancer.</a> Proc. Natl. Acad. Sci. U. S. A. 90, 3294-3294 (1993).</li><li>Inman, G. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=SB-431542+is+a+potent+and+specific+inhibitor+of+transforming+growth+factor-b+superfamily+type+I+activin+receptor-like+kinase+(ALK)+receptors+ALK4,+ALK5,+and+ALK7.">SB-431542 is a potent and specific inhibitor of transforming growth factor-b superfamily type I activin receptor-like kinase (ALK) receptors ALK4, ALK5, and ALK7.</a> Mol. Pharmacol. 62, 65-65 (2002).</li><li>Wiercinska, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+TGF-&#946;/Smad+pathway+induces+breast+cancer+cell+invasion+through+the+up-regulation+of+matrix+metalloproteinase+2+and+9+in+a+spheroid+invasion+model+system.">The TGF-&#946;/Smad pathway induces breast cancer cell invasion through the up-regulation of matrix metalloproteinase 2 and 9 in a spheroid invasion model system.</a> Breast Cancer Res. Treat. 128, 657-657 (2011).</li><li>Tang, B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=TGF-&#946;+switches+from+tumor+suppressor+to+prometastatic+factor+in+a+model+of+breast+cancer+progression.">TGF-&#946; switches from tumor suppressor to prometastatic factor in a model of breast cancer progression.</a> J. Clin. Invest. 112, 1116-1116 (2003).</li><li>Provenzano, P. P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Collagen+density+promotes+mammary+tumor+initiation+and+progression.">Collagen density promotes mammary tumor initiation and progression.</a> BMC. Med. 6, 11-11 (2008).</li><li>Ramaswamy, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+molecular+signature+of+metastasis+in+primary+solid+tumors.">A molecular signature of metastasis in primary solid tumors.</a> Nat. Genet. 33, 49-49 (2003).</li><li>Debnath, J., Brugge, J. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Modelling+glandular+epithelial+cancers+in+three-dimensional+cultures.">Modelling glandular epithelial cancers in three-dimensional cultures.</a> Nat. Rev. Cancer. 5, 675-675 (2005).</li><li>Pampaloni, F., Reynaud, E. G., Stelzer, E. H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+third+dimension+bridges+the+gap+between+cell+culture+and+live+tissue.">The third dimension bridges the gap between cell culture and live tissue.</a> Nat. Rev. Mol. Cell. Biol. 8, 839-839 (2007).</li><li>Lee, G. Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Three-dimensional+culture+models+of+normal+and+malignant+breast+epithelial+cells.">Three-dimensional culture models of normal and malignant breast epithelial cells.</a> Nat. Methods. 4, 359-359 (2007).</li><li>Petersen, O. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Interaction+with+basement+membrane+serves+to+rapidly+distinguish+growth+and+differentiation+pattern+of+normal+and+malignant+human+breast+epithelial+cells.">Interaction with basement membrane serves to rapidly distinguish growth and differentiation pattern of normal and malignant human breast epithelial cells.</a> Proc. Natl. Acad. Sci. U. S. A. 89, 9064-9064 (1992).</li><li>Debnath, J., Muthuswamy, S. K., Brugge, J. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Morphogenesis+and+oncogenesis+of+MCF10A+mammary+epithelial+acini+grown+in+three-dimensional+basement+membrane+cultures.">Morphogenesis and oncogenesis of MCF10A mammary epithelial acini grown in three-dimensional basement membrane cultures.</a> 30, 256-256 (2011).</li><li>Li, Q. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=p21-Activated+kinase+1+coordinates+aberrant+cell+survival+and+pericellular+proteolysis+in+a+three-dimensional+culture+model+for+premalignant+progression+of+human+breast+cancer.">p21-Activated kinase 1 coordinates aberrant cell survival and pericellular proteolysis in a three-dimensional culture model for premalignant progression of human breast cancer.</a> 10, 314-314 (2011).</li><li>Li, Q., Chow, A. B., Mattingly, R. R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Three-dimensional+overlay+culture+models+of+human+breast+cancer+reveal+a+critical+sensitivity+to+mitogen-activated+protein+kinase+kinase+inhibitors.">Three-dimensional overlay culture models of human breast cancer reveal a critical sensitivity to mitogen-activated protein kinase kinase inhibitors.</a> J. Pharmacol. Exp. Ther. 332, 821-821 (2010).</li></ol>

We established a spheroid model in which MCF10A1 cells and its malignant derivatives invade into a collagen matrix in a TGF-&beta;&#45;dependent manner. First, spheroids are formed in 96-wells round bottom suspension plates in the presence of methylcellulose. Of course, also U-shaped poly&#45;HEMA coated plates can be used for this purpose. Methylcellulose is absolutely required in this step, since cells will die in the absence of methylcellulose. TGF&#45;&beta; is added directly to the collagen-methocel mixture since we...

<table border="1">
	<tbody>
 <tr>
	<td>Name of the reagent</td>
	<td>Company</td>
	<td>Catalogue number</td>
	<td>Comments (optional)</td>
 </tr>
 <tr>
	<td>Methyl cellulose</td>
	<td>Sigma-Aldrich</td>
	<td>M0512</td>
	<td>&nbsp;</td>
 </tr>
 <tr>
	<td>PureCol</td>
	<td>Advanced Biomatrix</td>
	<td>5005-B</td>
	<td>&nbsp;</td>
 </tr>
 <tr>
	<td>pH indicator strips</td>
	<td>Merck</td>
	<td>9533</td>
	<td>&nbsp;</td>
 </tr>
 <tr>
	<td>96-well suspension plates</td>
	<td>Greiner Bio-one</td>
	<td>650 185</td>
	<td>&nbsp;</td>
 </tr>
 <tr>
	<td>96-well adhesion TC plates</td>
	<td>Greiner Bio-one</td>
	<td>655 180</td>
	<td>&nbsp;</td>
 </tr>
 </tbody>
</table>

spheroid assay to measure tgf-&#946;-induced invasion

TGF-&beta; has opposing roles in breast cancer progression by acting as a tumor suppressor in the initial phase, but stimulating invasion and metastasis at later stage1,2. Moreover, TGF-&beta; is frequently overexpressed in breast cancer and its expression correlates with poor prognosis and metastasis 3,4. The mechanisms by which TGF-&beta; induces invasion are not well understood.
TGF-&beta; elicits its cellular responses via TGF-&beta; type II (T&beta;RII) and type I (T&beta;RI) receptors. Upon TGF-&beta;-induced heteromeric complex formation, T&beta;RII phosphorylates the T&beta;RI. The activated T&beta;RI initiates its intracellular canonical signaling pathway by phosphorylating receptor Smads (R-Smads), i.e. Smad2 and Smad3. These activated R-Smads form heteromeric complexes with Smad4, which accumulate in the nucleus and regulate the transcription of target genes5. In addition to the previously described Smad pathway, receptor activation results in activation of several other non-Smad signaling pathways, for example Mitogen Activated Protein Kinase (MAPK) pathways6.
To study the role of TGF-&beta; in different stages of breast cancer, we made use of the MCF10A cell system. This system consists of spontaneously immortalized MCF10A1 (M1) breast epithelial cells7, the H-RAS transformed M1-derivative MCF10AneoT (M2), which produces premalignant lesions in mice8, and the M2-derivative MCF10CA1a (M4), which was established from M2 xenografts and forms high grade carcinomas with the ability to metastasize to the lung9. This MCF10A series offers the possibility to study the responses of cells with different grades of malignancy that are not biased by a different genetic background.
For the analysis of TGF-&beta;-induced invasion, we generated homotypic MCF10A spheroid cell cultures embedded in a 3D collagen matrix in vitro (Fig 1). Such models closely resemble human tumors in vivo by establishing a gradient of oxygen and nutrients, resulting in active and invasive cells on the outside and quiescent or even necrotic cells in the inside of the spheroid10. Spheroid based assays have also been shown to better recapitulate drug resistance than monolayer cultures11. This MCF10 3D model system allowed us to investigate the impact of TGF-&beta; signaling on the invasive properties of breast cells in different stages of malignancy.

Watch this Scientific Journal Video about Spheroid Assay to Measure TGF-Î²-induced Invasion at JoVE.com

Spheroid Assay to Measure TGF-&#946;-induced Invasion

An assay to quantitatively measure Transforming Growth Factor (TGF)-&#x03B2;-induced invasion in 3-dimensional collagen gels is described. This assay takes advantage of the MCF10A series of cell lines, which represent different stages of breast cancer development. This method can be adopted to be used with other cell lines and might be used to investigate other potential activators or inhibitors of invasion.

TGF-&beta; has opposing roles in breast cancer progression by acting as a tumor suppressor in the initial phase, but stimulating invasion and metastasis ...

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