Featured Research

from universities, journals, and other organizations

Mature B Cells Reprogrammed To Stem-cell-like State

Date:
April 21, 2008
Source:
Whitehead Institute for Biomedical Research
Summary:
Fully differentiated mouse cells, such as mature B cells, can be reprogrammed to embryonic-stem-cell-like induced pluripotent stem cells, without the use of an egg. Using reprogrammed mature B cells, researchers may be able to create mouse models that will aid in understanding autoimmune diseases such as multiple sclerosis and type 1 diabetes.

Fully mature, differentiated B cells can be reprogrammed to an embryonic-stem-cell-like state, without the use of an egg according to a study published in Cell.

Related Articles


In previous research, induced pluripotent stem (IPS) cells have been created from fibroblasts, a specific type of skin cells that may differentiate into other types of skin cells. Because there is no way to tell if the fibroblasts were fully differentiated, the cells used in earlier experiments may have been less differentiated and therefore easier to convert to the embryonic-stem-cell-like state of IPS cells.

B cells are immune cells that can bind to specific antigens, such as proteins from bacteria, viruses or microorganisms. Unlike fibroblasts, mature B cells have a specific part of their DNA cut out as a final maturation step. "Once that piece of DNA is cut out, it can't come back," says Jacob Hanna, first author on the paper and a postdoctoral fellow in Whitehead Member Rudolf Jaenisch's lab. "Checking the genome give us a way to make sure the resulting IPS cells were not from immature cells."

Hanna and his colleagues began the experiment by generating IPS cells from immature B cells. Similar to the process used to create IPS cells from fibroblast cells, Hanna successfully reprogrammed the immature B cells into IPS cells by using retroviruses to transfer four genes (Oct4, Sox2, c-Myc and Klf4) into the cells' DNA.

However, an additional factor, CCAAT/enhancer-binding-protein-± (C/EBP±), was needed to nudge mature B cells to be reprogrammed as IPS cells.

Like IPS cells from earlier fibroblast studies, the IPS cells from both the mature and immature B cells could be used to create mice. The mice grown from the reprogrammed mature B cells were missing the same part of their DNA as the mature B cells, demonstrating that Hanna and his colleagues had successfully reprogrammed fully differentiated cells.

In addition to demonstrating the power of reprogramming, this work offers the promise of powerful new mouse models for autoimmune diseases such as multiple sclerosis and type 1 diabetes, in which the body attacks certain types of its own cells. For example, mature B or T cells specific for nerve cells called glia could be reprogrammed to IPS cells and then used to create mice with an entire immune system that is primed to only attack the glia cells, thereby creating a mouse model for studying multiple sclerosis.

Eventually, researchers will be able to study diseases by following a similar process with human cells, predicts Jaenisch, who is also a professor of biology at Massachusetts Institute of Technology. "In principle, this will allow you to transfer a complex genetic human disease into a Petri dish, and study it," he says. "That could be the first step to analyze the disease and to define a therapy."

This research was supported by the National Institutes of Health and the Helen Hay Whitney Foundation.

Journal reference: Direct reprogramming of terminally differentiated mature B lymphocytes to pluripotency. Cell, April 18, 2008 134(2) Authors and affiliations: Jacob Hanna (1), Styliani Markoulaki (1), Patrick Schorderet (1), Caroline Beard (1), Bryce W. Carey (1), Marius Wernig (1), Menno P. Creyghton (1), Eveline J. Steine (1), (1), John P. Cassady (1), Christopher J. Lengner (1), Jessica A. Dausman (1), Rudolf Jaenisch (1,2)

  1. Whitehead Institute for Biomedical Research, Cambridge, MA 02142 USA
  2. Department of Biology, MIT, Cambridge, MA 02142 USA

Story Source:

The above story is based on materials provided by Whitehead Institute for Biomedical Research. Note: Materials may be edited for content and length.


Cite This Page:

Whitehead Institute for Biomedical Research. "Mature B Cells Reprogrammed To Stem-cell-like State." ScienceDaily. ScienceDaily, 21 April 2008. <www.sciencedaily.com/releases/2008/04/080417130552.htm>.
Whitehead Institute for Biomedical Research. (2008, April 21). Mature B Cells Reprogrammed To Stem-cell-like State. ScienceDaily. Retrieved April 25, 2015 from www.sciencedaily.com/releases/2008/04/080417130552.htm
Whitehead Institute for Biomedical Research. "Mature B Cells Reprogrammed To Stem-cell-like State." ScienceDaily. www.sciencedaily.com/releases/2008/04/080417130552.htm (accessed April 25, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Saturday, April 25, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

85 Killed in Niger by Meningitis Since Start of Year

85 Killed in Niger by Meningitis Since Start of Year

AFP (Apr. 24, 2015) — A meningitis outbreak in Niger has killed 85 people since the start of the year prompting authorities to close schools in the capital Niamey until Monday. Video provided by AFP
Powered by NewsLook.com
C-Section Births a Trend in Brazil

C-Section Births a Trend in Brazil

AFP (Apr. 24, 2015) — More than half of Brazil&apos;s babies are born via cesarean section, as mothers and doctors opt for a faster and less painful experience despite the health risks. Duration: 02:02 Video provided by AFP
Powered by NewsLook.com
Anti-Malaria Jab Hope

Anti-Malaria Jab Hope

Reuters - News Video Online (Apr. 24, 2015) — The world&apos;s first anti-malaria vaccine could get the go-ahead for use in Africa from October if approved by international regulators. Paul Chapman reports. Video provided by Reuters
Powered by NewsLook.com
3D Food Printing: The Meal of the Future?

3D Food Printing: The Meal of the Future?

AP (Apr. 23, 2015) — Developers of 3D food printing hope the culinary technology will revolutionize the way we cook and eat. (April 23) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins