Navigation Links
Protein lost in tumors blocks normal cells from being reprogrammed into stem cells
Date:3/7/2013

Researchers from the Icahn School of Medicine at Mount Sinai have discovered that a particular protein prevents normal cells from being reprogrammed into cells that resemble stem cells, providing new insight into how they may lose their plasticity during normal development. This finding has broad-reaching implications for how cells change during both normal and disease development. The data are published this week in Nature Communications.

In a previous study, Emily Bernstein, PhD, and her team at Mount Sinai studied the natural progression of melanoma using mouse and human cells, as well as patient samples, and found that the loss of a specific histone variant called macroH2A, which is a protein that helps package DNA, was directly related to the growth and metastasis of melanoma. In the current study, her team wanted to find out how this molecule might act as a barrier to cellular reprogramming. The importance of cellular reprogramming has been recently highlighted by the winners of the Nobel Prize of Medicine (2012), and explores the capacity of reversing adult cells to an early stage of development, the so called embryonic stem cell.

Working with researchers at the University of Pennsylvania, Dr. Bernstein evaluated mice that were genetically engineered to lack macroH2A in comparison to control or "wild-type" mice. They used skin cells from these mice and attempted to reprogram the cells in petri dishes into pluripotent cells. They found that the cells derived from mice without macroH2A were much more plastic, meaning they were more easily reprogrammed into stem-like cells, compared to the wild-type mice. This indicates that macroH2A may block cellular reprogramming by silencing genes required for plasticity.

"This is the first evidence of the involvement of a histone variant protein as an epigenetic barrier to induced pluripotency (iPS) reprogramming," said Dr. Bernstein, who is an Assistant Professor of Oncological Sciences and Dermatology at the Graduate School of Biomedical Sciences at Mount Sinai, and corresponding author of the study. "These findings help us to understand the progression of different cancers and how macroH2A might be acting as a barrier to tumor development."

Next, Dr. Bernstein and her team plan to create cancer cells in a petri dish by manipulating healthy cells with genetic mutations often associated with cancer, coupled to removal of macroH2A to examine whether the cells are capable of forming tumors.


'/>"/>

Contact: Press Office
newsmedia@mssm.edu
212-241-9200
The Mount Sinai Hospital / Mount Sinai School of Medicine
Source:Eurekalert

Related medicine news :

1. Warwick scientists uncover how checkpoint proteins bind chromosomes
2. Specific protein triggers changes in neurons in brain reward center linked to cocaine addiction
3. Unusual protein helps regulate key cell communication pathway
4. Protein prevents DNA damage in the developing brain and might serve as a tumor suppressor
5. RANK protein promotes the initiation, progression and metastasis of human breast cancer
6. Protein may represent a switch to turn off B cell lymphoma
7. Protein RAL associated with aggressive characteristics in prostate, bladder and skin cancers
8. Breast cancer clinical trial tests combo of heat shock protein inhibitor and hormonal therapy
9. Pivotal role for proteins -- from helping turn carbs into energy to causing devastating disease
10. New molecular structure offers first picture of a protein family vital to human health
11. Wayne State University researcher examines proteins role in diabetic retinopathy
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... ... June 27, 2016 , ... Quality metrics are proliferating in cancer ... they remain in the eye of the beholder, according to experts who offered insights ... American Journal of Managed Care. For the full issue, click here . , ...
(Date:6/26/2016)... ... June 26, 2016 , ... Pixel Film Studios Released ProSlice ... "Film editors can give their videos a whole new perspective by using the ... of Pixel Film Studios. , ProSlice Levels contains over 30 Different presets to ...
(Date:6/26/2016)... ... ... Kasmer, a legally blind and certified personal trainer is helping to develop a weight loss ... plans to fix the two major problems leading the fitness industry today:, ... , They don’t eliminate all the reasons people quit their exercise program ...
(Date:6/25/2016)... ... June 25, 2016 , ... Experts from the ... AcademyHealth’s Annual Research Meeting June 26-28, 2016, at the Hynes Convention Center in ... topics including advance care planning, healthcare costs and patient and family engagement. , ...
(Date:6/25/2016)... ... , ... The temporary closing of Bruton Memorial Library on June 21 due to a possible ... often overlooked aspect of head lice: the parasite’s ability to live away from a human ... but a necessary one in the event that lice have simply gotten out of control. ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... Pa. , June 23, 2016 Bracket ... will launch its next generation clinical outcomes platform, Bracket eCOA ... Meeting held on June 26 – 30, 2016 in ... the first electronic Clinical Outcome Assessment product of its kind ... Booth #715. Bracket eCOA 6.0 is a flexible ...
(Date:6/23/2016)... announced the establishment of Astellas Farma Colombia (AFC), a new affiliate with operations headquartered in Bogota. Colombia ... ... ... ... Astellas is a pharmaceutical ...
(Date:6/23/2016)... , June 23, 2016 The vast ... an outpatient dialysis facility.  Treatments are usually 3 times ... hours per visit, including travel time, equipment preparation and ... patient, but especially grueling for patients who are elderly ... a skilled nursing and rehabilitation centers for some duration ...
Breaking Medicine Technology: