Navigation Links
Pourquié lab links beta-catenin gradient to process of somite formation

The Stowers Institutes Pourqui Lab has demonstrated the importance of Beta-catenin, a key component of the Wnt-signaling pathway in the process of somite formation. The work has been published on the Web site of Nature Cell Biology and will appear in a future print issued. It was conducted using a novel real-time imaging technology.

The team analyzed the somite segmentation process that results in the formation of the vertebral column. This process is thought to be controlled by two components: a molecular oscillator (the segmentation clock), and the graded activity of several major signaling pathways (the gradient) in the presomitic mesoderm (PSM). The PSM is the middle layer of the three cell layers that form an early embryo. Wnt-signaling has been implicated in both these mechanisms, but precisely how was unclear until now.

In this work, the Pourqui team tested the importance of Beta-catenin, a protein that functions as the principal mediator of the Wnt-signaling pathway, in the process of somite formation. They showed that a newly identified Beta-catenin protein gradient in the PSM is critical in regulating mesoderm maturation. Real-time imaging experiments also demonstrated that, conversely, the segmentation clock is not caused by graded levels of Beta-catenin protein.

We were able to demonstrate that increasing Beta-catenin protein levels dramatically alters PSM maturation, said Alexander Aulehla, M.D., Senior Research Associate and first author on the paper. But, by using the real-time imaging technique in mouse embryos, we could show that increasing Beta-catenin also corresponded with ongoing, even ectopic, oscillations of the segmentation clock, which controls the rate of somite development.

This work offers novel insights into how the mechanisms of maturation and oscillation in the PSM are controlled and how they are interconnected, said Olivier Pourqui, Ph.D., Investigator and senior author on the paper. Additionally, this project has allowed us to achieve the longstanding goal of visualizing the segmentation clock in real-time using fluorescence-based imaging, which is sure to impact other important projects in our lab

Since joining the Stowers Institute in 2002, the Pourqui Lab has made a number of significant discoveries related to somite development. Somites eventually give rise to the vertebral column, which is malformed in people born with congenital scoliosis. It is believed that some cases of congenital scoliosis are caused by mutations related to the segmentation clock.

Contact: Marie Jennings
Stowers Institute for Medical Research

Related biology news :

1. Study links cat disease to flame retardants in furniture and to pet food
2. Cholesterol metabolism links early- and late-onset Alzheimers disease
3. MIT links gene to cholesterol
4. Insulins brain impact links drugs and diabetes
5. Wireless Public Safety Solution From BIO-key(R) and DaProSystems Links Virginia Law Enforcement Agencies
6. Study links success of invasive Argentine ants to diet shifts
7. Thermochemical process converts poultry litter into bio-oil
8. New insight into the mechanisms of voltage sensing and transduction in biological processes
9. UCI researchers restore memory process in most common form of mental disability
10. ACT Ensures Integrity of Testing Process Through Deployment of BIO-keys(R) Biometric ID Technology
11. Engineered weathering process could mitigate global warming
Post Your Comments:
(Date:11/19/2015)... 2015  Based on its in-depth analysis of the ... with the 2015 Global Frost & Sullivan Award for ... presents this award to the company that has developed ... of the market it serves. The award recognizes the ... on customer base demands, the overall impact it has ...
(Date:11/17/2015)... , November 17, 2015 ... 19 novembre  2015.  --> Paris , ... --> DERMALOG, le leader de l,innovation biométrique, a ... fois passeports et empreintes sur la même surface de ... passeports et l,autre pour les empreintes digitales. Désormais, un ...
(Date:11/12/2015)... 2015  Arxspan has entered into an agreement ... for use of its ArxLab cloud-based suite of ... partnership will support the institute,s efforts to electronically ... information internally and with external collaborators. The ArxLab ... the Institute,s electronic laboratory notebook, compound and assay ...
Breaking Biology News(10 mins):
(Date:11/27/2015)... ... November 27, 2015 , ... Pittcon is ... 2,000 technical presentations offered in symposia, oral sessions, workshops, awards, and posters. ... wide range of applications such as, but not limited to, biotechnology, biomedical, drug ...
(Date:11/26/2015)... , November 26, 2015 ... device company specializing in imaging technologies, announced today that it ... as part of the Horizon 2020 European Union Framework Programme ... a large-scale clinical trial in breast cancer. , ... , --> --> The ...
(Date:11/25/2015)... 2 nouvelles études permettent d , identifier ... souches bactériennes retrouvées dans la plaque dentaire des ... Ces recherches  ouvrent une nouvelle voie ... l,un des problèmes de santé les plus fréquemm ... --> 2 nouvelles études permettent d , ...
(Date:11/25/2015)...  Neurocrine Biosciences, Inc. (Nasdaq: NBIX ) announced ... of Neurocrine Biosciences, will be presenting at the 27th ... York . .   ... minutes prior to the presentation to download or install ... be available on the website approximately one hour after ...
Breaking Biology Technology: