Navigation Links
New roles emerge for non-coding RNAs in directing embryonic development
Date:8/28/2011

Scientists at the Broad Institute of MIT and Harvard have discovered that a mysterious class of large RNAs plays a central role in embryonic development, contrary to the dogma that proteins alone are the master regulators of this process. The research, published online August 28 in the journal Nature, reveals that these RNAs orchestrate the fate of embryonic stem (ES) cells by keeping them in their fledgling state or directing them along the path to cell specialization.

Broad scientists discovered several years ago that the human and mouse genomes encode thousands of unusual RNAs termed large, intergenic non-coding RNAs (lincRNAs) but their role was almost entirely unknown. By studying more than 100 lincRNAs in ES cells, the researchers now show that these RNAs help regulate development by physically interacting with proteins to coordinate gene expression and suggest that lincRNAs may play similar roles in most cells.

"There's been a lot of debate about what lincRNAs are doing," said Eric Lander, director of the Broad Institute and the senior author of the paper. "It's now clear that they play critical roles in regulating developmental decisions that is, cell fate. This was a big surprise, because specific types of proteins have been thought to be the master controls of development."

"This is the first global study of lincRNAs," said Mitchell Guttman, first author of the paper and a graduate student at MIT and the Broad Institute. "We picked embryonic stem cells in particular because they are so important to development and so well understood. This allowed us to dissect the role of lincRNAs within the circuitry of a cell."

The researchers used genetic tools to inhibit more than 100 lincRNAs and found that the vast majority more than 90 percent had a significant impact on embryonic stem cells, indicating that the RNAs play a key role in the cells' circuitry.

Embryonic stem cells can follow one of two main routes. They can either differentiate, becoming cells of a specific lineage such as blood cells or neurons, or they can stay in a pluripotent state, duplicating themselves without losing the ability to become any cell in the body. When the researchers turned off each lincRNA in turn, they found dozens that suppress genes that are important only in specific kinds of cells. They also found dozens of lincRNAs that cause the stem cells to exit the pluripotent state.

"It's a balancing act," said Guttman. "To maintain the pluripotent state, you need to repress differentiation genes."

The researchers also uncovered a critical clue about how lincRNAs carry out their important job. Through biochemical analysis, they found that lincRNAs physically interact with key proteins involved in influencing cell fate to coordinate their responses.

"The lincRNAs appear to play an organizing role, acting as a scaffold to assemble a diverse group of proteins into functional units," said John Rinn, an author on the paper, an assistant professor at Harvard University and Medical School, and a senior associate member of the Broad Institute. "lincRNAs are like team captains, bringing together the right players to get a job done."

"By understanding how these interactions form, we may be able to engineer these RNAs to do what we want them to do," said Guttman. "This could make it possible to target key genes that are improperly regulated in disease."

Aviv Regev, an author on the paper, a core member of the Broad Institute, and associate professor at MIT, sees the team's approach to studying the lincRNAs as important for the field. "Many people are interested in lincRNAs, but they need a comprehensive view of the whole collection of lincRNAs," said Regev. "The large-scale data and technology from this study will be useful for scientists worldwide in studying both lincRNAs as well as many other RNAs in the cell."


'/>"/>

Contact: Haley Bridger
hbridger@broadinstitute.org
617-714-7968
Broad Institute of MIT and Harvard
Source:Eurekalert

Related biology news :

1. Its good to have a shady side: sun and shade leaves play different roles in tree canopies
2. Molecular muscle: Small parts of a big protein play key roles in building tissues
3. Key plant hormone and its roles in plant biology is focus of new book
4. Biotech, nanotech and synthetic biology roles in future food supply explored
5. Small RNAs can play critical roles in male infertility/contraception
6. Illuminating life: How RNA, after a century in the shadows, emerged into the spotlight
7. Landsat 5 satellite helps emergency managers fight largest fire in Arizona history
8. Species reemergence after collapse: Possible but different
9. Mathematical model explains how complex societies emerge, collapse
10. Researchers discover human immune system has emergency backup plan
11. Ancient forest emerges mummified from the Arctic
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/30/2017)...  On April 6-7, 2017, Sequencing.com will host the ... hackathon at Microsoft,s headquarters in Redmond, Washington ... developing health and wellness apps that provide a unique, ... is the first hackathon for personal genomics and ... in the genomics, tech and health industries are sending ...
(Date:3/28/2017)... PUNE, India , March 28, 2017 ... (Analog, IP, Biometrics), Hardware (Camera, Monitors, Servers, Storage Devices), ... Maintenance), Vertical, and Region - Global Forecast to 2022", ... 30.37 Billion in 2016 and is projected to reach ... 15.4% between 2017 and 2022. The base year considered ...
(Date:3/23/2017)... , March 23, 2017 The report "Gesture Recognition ... Biometric), Industry, and Geography - Global Forecast to 2022", published by MarketsandMarkets, the ... a CAGR of 29.63% between 2017 and 2022. ... ... ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... Alto, CA, USA (PRWEB) , ... October 11, 2017 , ... ... set to take place on 7th and 8th June 2018 in San Francisco, CA. ... policy influencers as well as several distinguished CEOs, board directors and government officials from ...
(Date:10/11/2017)... ... , ... Disappearing forests and increased emissions are the main causes of the ... Especially those living in larger cities are affected by air pollution related diseases. , ... pollution-affected countries globally - decided to take action. , “I knew I had to ...
(Date:10/10/2017)... Los Angeles, CA (PRWEB) , ... ... ... Pharmaceuticals, Inc., a development-stage cancer-focused pharmaceutical company advancing targeted antibody-drug conjugate (ADC) ... all uses of targeted HPLN (Hybrid Polymerized Liposomal Nanoparticle), a technology developed ...
(Date:10/10/2017)... SANTA CRUZ, Calif. , Oct. 10, 2017 /PRNewswire/ ... SBIR grant from the NIH to develop RealSeq®-SC (Single ... preparation kit for profiling small RNAs (including microRNAs) from ... Cell Analysis Program highlights the need to accelerate development ... "New techniques for ...
Breaking Biology Technology: