HOME >> BIOLOGY >> NEWS
The ultimate spa: embryonic body wash controls left-right development

La Jolla, Calif.- Humans and other animals may appear to be symmetrical on the outside, but symmetry is only skin deep. Many body organs, such as the stomach, the heart and the liver, are tipped to the right or left side. So how does the developing embryo distinguish left from right? Salk scientists have now discovered that the foundations for the basic left-right body plan are laid by a microscopic 'pump' on the outer surface of the embryo's underside that wafts chemical messengers over to the left side of the body. This sets up a chemical concentration gradient that tells stem cells how and where to develop. The remarkable findings, including movie footage of the 'pump,' are published in the May 20th edition of the journal Cell.

Juan Carlos Izpisa Belmonte and his colleagues studied the ventral node, a small patch of specialized cells on the outer surface of the underside ('ventral' side) of early embryos in many animals. Each cell in the ventral node has a single, rapidly rotating thread (cilium) projecting from the cell surface. Belmonte and colleagues at the University of Tokyo in Japan had previously demonstrated that the ventral node and its rotating cilia influence the left-right body plan, but until now no-one knew the mechanisms involved.

In the current study, Belmonte's team compared the ventral node in embryos of mice, rabbits and fish, and discovered the same mechanism in all these animals: the rapid, clockwise rotation of the whip-like cilia was actively moving fluid from the right side to the left side of the developing embryo.

The Salk scientists were intrigued by the finding because the forest of rotating cilia were more likely to create a whirlpool than a river. "The unidirectional flow produced by the rotation-like movement of the cilia required a specific mechanism because a simple circling movement would have, logically, just produced a vortex," said Belmonte.

Over the next three years, using a combination of
'"/>

Contact: Cathy Yarbrough
yarbrough@salk.edu
858-453-4100 x1290
Salk Institute
19-May-2005


Page: 1 2 3

Related biology news :

1. Researchers discover human embryonic stem cells are the ultimate perpetual fuel cell
2. Exercise aside, genes may ultimately dictate seniors mobility
3. Fragmented habitats no ultimate refuges for forest-dwelling tropical birds
4. UCLA scientists produce functioning neurons from human embryonic stem cells
5. Not all embryonic stem cell lines are created equal
6. Discredited Korean embryonic stem cells true origins revealed
7. Study: Donated embryos could result in more than 2,000 new embryonic stem cell lines
8. UCLA researchers reprogram normal tissue cells into embryonic stem cells
9. Reprogrammed fibroblasts identical to embryonic stem cells
10. A twist of fate -- Reprogrammed fibroblasts resemble embryonic stem cells
11. Left-right wiring determined by neural communication in the embryonic worm

Post Your Comments:
(Date:4/1/2015)... 2015   Medisafe ™, the leading global medication ... iOS and Android smartphones and tablets, ... the platform to allow patients to track and correlate ... time, patients will be able to visualize in real-time ... biometrics, such as glucose levels and blood pressure. ...
(Date:3/30/2015)... , Mar. 26, 2015 Research and Markets ... of the "Global Gesture Recognition Market in Automotive ... The analysts forecast the Global Gesture Recognition market in ... over the period 2013-2018. Gesture recognition is ... to different gestures of an individual. Gesture recognition technology ...
(Date:3/24/2015)... , Mar. 24, 2015 Research and Markets ... and Voice Biometrics - Global Strategic Business Report" report to ... Face and Voice Biometrics in US$ Thousands by the following Segments: ... for the US, Canada , Japan ... , Middle East & Africa ...
Breaking Biology News(10 mins):Medisafe Announces Launch of Biometric Integration, Enabling Patients to Stay Adherent to Their Meds and See Tangible Health Results 2Global Gesture Recognition Market in Automotive Sector Report 2015 - Growing Number of Partnerships 2Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 2Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 3Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 4Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 5Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 6
(Date:4/16/2015)... (PRWEB) April 16, 2015 Capillus, ... distribution and physician network in Europe and Asia. ... has appointed Fernando Bermúdez, former Business Development Director ... An industry veteran, Mr. Bermúdez’s professional achievements include ... in Spain, while also penetrating the Portuguese marketplace ...
(Date:4/16/2015)... OncoTAb, Inc., a ... spin-out company, announced today the appointment of physician ... Chief Operating Officer (COO). Cooper brings to OncoTAb ... clinical diagnostic and biotechnology platforms in the fields ... extensive career transcends the field of medical and ...
(Date:4/16/2015)... 2015 /CNW/ - Bioenterprise Corporation is pleased to announce that ... Charlottetown , PEI.  Bioenterprise has established a ... Council for the commercialization of agricultural technologies and innovations. ... PEI ADAPT.  They have been at the heart of ... explains Dave Smardon , President & CEO of ...
(Date:4/16/2015)... -- Avelas Biosciences, an in vivo cancer ... that it has initiated a Phase 1b study of ... primary, non-recurrent breast cancer undergoing surgery. In commencing the ... Steven Chen , M.D., as vice president of ... study will enroll up to 39 women with stage ...
Breaking Biology Technology:Capillus, LLC Extends Laser Hair Therapy Products to Europe and Asia 2OncoTAb Names Dr. David L. Cooper as COO 2Bioenterprise Corporation Expands into the Maritimes 2Avelas Biosciences Initiates Phase 1b Trial of AVB-620 in Breast Cancer Patients 2Avelas Biosciences Initiates Phase 1b Trial of AVB-620 in Breast Cancer Patients 3
Cached News: