Name: mouse mammary epithelial cells form mammospheres during lactogenic differentiation
Uploaded: 2009-10-06T16:30:00
Description: Watch this Scientific Journal Video about Mouse Mammary Epithelial Cells form Mammospheres During Lactogenic Differentiation at JoVE.com

<p class="jove_content">Funds from Congressionally Directed Medical Research Fund grant (DAMD17-01-0264) to M.L. Cutler and United States Military Cancer Institute to M.L. Cutler supported the work.</p>

<ol>
<li>The HC11 cells were grown to confluence for 6 days in RPMI 1640 medium supplemented with 10% fetal calf serum, 5&mu;g/ml Insulin, 10 mM HEPES, 10ng/ml epidermal growth factor (EGF) to establish competence.</li>
<li>The cells were washed with PBS and maintained in growth media without EGF for 24 hours.</li>
<li>To induce lactogenic differentiation the cells were incubated in differentiation media, i.e. RPMI with dexamethasone (10<sup>-6</sup> M), insulin (5 &mu;g /ml) and prolactin (5 &mu;g /ml) referred to as DIP.</li>
<li>At the s...

<ol>
	<li>Blatchford, D. R., Hendry, K. A., Turner, M. D., Burgoyne, R. D., Wilde, C. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Vectorial+secretion+by+constitutive+and+regulated+secretory+pathways+in+mammary+epithelial+cells.">Vectorial secretion by constitutive and regulated secretory pathways in mammary epithelial cells.</a> <em style='font-style: italic'>Epithelial Cell Biol</em>. <b>4</b>, 8-16 (1995).</li><li>Wang, W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Glucocorticoid+induced+expression+of+connective+tissue+growth+factor+contributes+to+lactogenic+differentiation+of+mouse+mammary+epithelial+cells.">Glucocorticoid induced expression of connective tissue growth factor contributes to lactogenic differentiation of mouse mammary epithelial cells.</a> <em style='font-style: italic'>J Cell Physiol</em>. <b>214</b>, 38-46 (2008).</li></ol>

<p class="jove_content">In order for this technique to be successful and of the best quality, the epithelial cells must be maintained at confluence prior to being induced with lactogenic hormones. There may be situations where there are numerous mammospheres, which makes the quantification difficult. Thus, for quantitative purposes it is best to photograph the mammospheres at a time point when the number of mammospheres is able to be counted.</p>
<p class="jove_content">While there are various molecular markers used to determine the degree of ...

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">	
		
		<div>
		<table border="1">
		<thead>
		<tr>
		<th>Material Name</th>
		<th>Type</th>
		<th>Company</th>
		<th>Catalogue Number</th>
		<th>Comment</th>
		</tr>
		</thead>
		<tbody>
		
<tr>
<td>RPMI</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>21870076</td>
<td>&nbsp;</td>
<tr>
<td>Fetal Bovine Serum</td>
<td>&nbsp;</td>
<td>Atlanta Biologicals</td>
<td>S11550</td>
<td>&nbsp;</td>
<tr>
<td>L-Glutamine</td>
<td>&nbsp;</td>
<td>Gibco</td>
<td>25030</td>
<td>&nbsp;</td>
<tr>
<td>PenStrep</td>
<td>&nbsp;</td>
<td>Gibco</td>
<td>15140</td>
<td>&nbsp;</td>
<tr>
<td>Hepes</td>
<td>&nbsp;</td>
<td>Quality Biologicals</td>
<td>118089060</td>
<td>&nbsp;</td>
<tr>
<td>EGF</td>
<td>&nbsp;</td>
<td>Sigma</td>
<td>E9644</td>
<td>&nbsp;</td>
<tr>
<td>Insulin</td>
<td>&nbsp;</td>
<td>Gibco</td>
<td>12585-014</td>
<td>&nbsp;</td>
<tr>
<td>Dexamethasone</td>
<td>&nbsp;</td>
<td>Sigma</td>
<td>D1756</td>
<td>&nbsp;</td>
<tr>
<td>Microscope</td>
<td>&nbsp;</td>
<td>Olympus</td>
<td>IX71</td>
<td>&nbsp;</td>
<tr>
<td>Digital Camera</td>
<td>&nbsp;</td>
<td>QImaging</td>
<td>Retiga 2000RV Fast 1394</td>
<td>&nbsp;</td>		</tbody>
		</table>
		</div>
	

mouse mammary epithelial cells form mammospheres during lactogenic differentiation

A phenotypic measure commonly used to determine the degree of lactogenic differentiation in mouse mammary epithelial cell cultures is the formation of dome shaped cell structures referred to as mammospheres <sup>1</sup>. The HC11 cell line has been employed as a model system for the study of regulation of mammary lactogenic differentiation both <em>in vitro</em> and <em>in vivo </em><sup>2</sup>. The HC11 cells differentiate and synthesize milk proteins in response to treatment with lactogenic hormones. Following the growth of HC11 mouse mammary epithelial cells to confluence, lactogenic differentiation was induced by the addition of a combination of lactogenic hormones including dexamethasone, insulin, and prolactin, referred to as DIP. The HC11 cells induced to differentiate were photographed at times up to 120 hours post induction of differentiation and the number of mammospheres that appeared in each culture was enumerated. The size of the individual mammospheres correlates with the degree of differentiation and this is depicted in the images of the differentiating cells.

Watch this Scientific Journal Video about Mouse Mammary Epithelial Cells form Mammospheres During Lactogenic Differentiation at JoVE.com

Mouse Mammary Epithelial Cells form Mammospheres During Lactogenic Differentiation

<p class="jove_content">HC11 lactogenic differentiation can be characterized by the formation of domed structures referred to as mammospheres. The structures can be enumerated by phase contrast microscopy to aid in quantifying lactogenic differentiation.</p>

A phenotypic measure commonly used to determine the degree of lactogenic differentiation in mouse mammary epithelial cell cultures is the formation of ...

Research

JoVE Journal

Biology

Mammary Epithelial Transplant Procedure

This article describes and compares the fat pad clearance procedure developed by DeOme KB et al.1 and the sparing procedure developed by Brill B et al.2, ...

Isolation of Mammary Epithelial Cells from Three-dimensional Mixed-cell Spheroid Co-culture

While enormous efforts have gone into identifying signaling pathways and molecules involved in normal and malignant cell behaviors1-2, much of this work ...

Efficient Differentiation of Mouse Embryonic Stem Cells into Motor Neurons

Direct differentiation of embryonic stem (ES) cells into functional  motor neurons represents a promising resource to study disease mechanisms, to  screen ...

Rapid Genetic Analysis of Epithelial-Mesenchymal Signaling During Hair Regeneration

Hair follicle morphogenesis, a complex process requiring interaction between epithelia-derived keratinocytes and the underlying mesenchyme, is an ...

Induction and Analysis of Epithelial to Mesenchymal Transition

Epithelial  to mesenchymal transition (EMT) is essential for proper morphogenesis during  development. Misregulation of this  process has been implicated ...

Detection of Alternative Splicing During Epithelial-Mesenchymal Transition

Alternative splicing plays a critical role in the epithelial-mesenchymal transition (EMT), an essential cellular program that occurs in various ...

Using Mouse Mammary Tumor Cells to Teach Core Biology Concepts: A Simple Lab Module

Undergraduate biology students are required to learn, understand and apply a variety of cellular and molecular biology concepts and techniques in ...

Trans-inner Cell Mass Injection of Embryonic Stem Cells Leads to Higher Chimerism Rates

In an effort to increase efficiency in the creation of genetically modified mice via ES Cell methodologies, we present an adaptation to the current ...

Efficient Dissection and Culture of Primary Mouse Retinal Pigment Epithelial Cells

Eye disorders affect millions of people worldwide, but the limited availability of human tissues hinders their study. Mouse models are powerful tools to ...

Protocol for Isolating Mammary Epithelial Cells from Human Tissue

Isolation and Culture of Primary Human Mammary Epithelial Cells

Author Spotlight: Integrating Eastern and Western Medicine for Treatment of Granulomatous Mastitis

The mammary gland is a fundamental structure of the breast and plays an essential role in reproduction. Human mammary epithelial cells (HMECs), which are ...