Navigation Links
An evolutionary surprise
Date:3/14/2012

WOODS HOLE, MAThe origin of the exquisitely complex vertebrate brain is somewhat mysterious. "In terms of evolution, it basically pops up out of nowhere. You don't see anything anatomically like it in other animals," says Ariel Pani, an investigator at the Marine Biological Laboratory (MBL) in Woods Hole and a graduate student at the University of Chicago.

But this week in the journal Nature, Pani and colleagues report finding some of the genetic processes that regulate vertebrate brain development in (of all places) the acorn worm, a brainless, burrowing marine invertebrate that they collected from Waquoit Bay in Falmouth, Mass.

The scientists were searching for ancestral evidence of three "signaling centers" in the vertebrate embryo that are major components of an "invisible scaffold that sets up the foundation of how the brain develops," Pani says. Diagnostic molecular features of these signaling centers are mostly missing in the sea squirts and the lancelets, the invertebrate chordates that are the closest evolutionary relatives of the vertebrates. This had suggested that these signaling centers are key innovations that arose de novo in the vertebrate lineage.

Yet, surprisingly, the scientists found highly similar signaling centers in the more distantly related acorn worm (Saccoglossus kowalevskii), a hemichordate. Acorn worm embryos lack nervous system structures comparable to vertebrate brains, and their lineages diverged from vertebrates more than 500 million years ago. Pani and colleagues found that, in the acorn worm, the signaling centers direct the formation of the embryonic body plan.

"What this means is the last (common) ancestor of the hemichordates and the vertebrates, even though it presumably did not have a vertebrate-like nervous system, had some very complex and vertebrate-like mechanisms for establishing its body plan," Pani says. "And one of the broad implications is that weird, squishy marine anim
'/>"/>

Contact: Diana Kenney
dkenney@mbl.edu
508-289-7139
Marine Biological Laboratory
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Leading evolutionary scientist to discuss how genome of bacteria has evolved
2. Depression could be evolutionary byproduct of immune system
3. Did an evolutionary arms race cause lupus? Biologist Harmit Malik receives grant to try and find out
4. New study sheds light on evolutionary origin of oxygen-based cellular respiration
5. University of Minnesota biologists replicate key evolutionary step
6. Revolutionary surgical technique for perforations of the eardrum
7. Human skull study causes evolutionary headache
8. Studying bat skulls, evolutionary biologists discover how species evolve
9. USC scientists revolutionary drug pump draws NSF support
10. Evolutionary biologist inducted into American Academy of Arts and Sciences
11. BioCrossroads Invests in Medical Device Company Developing Revolutionary Absorbable Stent
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
An evolutionary surprise
(Date:6/25/2015)... , June 25, 2015 ... Market by Type (Swipe & Area), Technology, Material (Optical ... Healthcare, Commercial Security & Others) & Geography - ... marketsandmarkets, the said market is expected to reach ... 17.1%. Browse 76 market Tables ...
(Date:6/24/2015)... This report provides market analysis of the ... It contains an analysis of the drivers, challenges, and ... from the short, medium, and long term perspective landscapes. ... and technology trends that currently, prevail in the market. ... to efficiently manage the increasing marine traffic and increasing ...
(Date:6/23/2015)... , June 23, 2015   MedNet Solutions ... supports the entire spectrum of clinical research, is ... ™ , the company,s intuitive, flexible and ... a Silver 2015 Stevie® Award by the ... & Services Website category.  The American Business Awards ...
Breaking Biology News(10 mins):Fingerprint Sensors Market Worth $14,500.07 Million by 2020 2Fingerprint Sensors Market Worth $14,500.07 Million by 2020 3Fingerprint Sensors Market Worth $14,500.07 Million by 2020 4Automatic Identification System Market by Class, by Platform, by Application and by Geography - Global Forecasts & Analysis to 2014 - 2020 2MedNet Solutions' iMedNet eClinical Wins Silver Stevie Award 2
... a down economy, Safeway Inc. presented a $685,236 check ... Genomics Research Institute (TGen). Dan Valenzuela, President of ... thanked the grocery chain,s customers and employees for stepping ... donate to such an organization as TGen. I think ...
... ISRAEL, March 4, 2009 Ben-Gurion University of the ... created in large nuclear reactors, making it unsuitable for ... 241), a form of the basic synthetic element found ... only be used for peaceful purposes. , This technique ...
... law on biological diversity is now being called ... Unclear legislation entails that biological diversity falls under ... coordinated efforts, according to Aalheiur Jhannsdttir. On ... in environmental law. International environmental law involving ...
Cached Biology News:Safeway gives $685,000 to TGen for breast cancer research 2Ben-Gurion University engineers develop technique to help combat nuclear proliferation 2
(Date:7/1/2015)... ... July 01, 2015 , ... A newly launched business plan contest will ask ... to innovation in life sciences R&D. The Pistoia Alliance President’s Startup Challenge 2015 will ... and a period of expert mentorship from a senior industry figure drawn from the ...
(Date:7/1/2015)... IN (PRWEB) , ... July 01, 2015 , ... Apex ... 2015 BIO International Convention in Philadelphia, PA. , The presentation took place ... and outlined the plans for the development of APX3330 for the treatment of pancreatic ...
(Date:7/1/2015)... NEW YORK , July 1, 2015 /PRNewswire/ ... G ), a global leader in designing, ... the Aecus Innovation Award in recognition of their ... operational efficiencies in UCB,s global business services (GBS) ... acknowledge service providers and clients that work together ...
(Date:6/30/2015)... ... June 30, 2015 , ... Students ... part in the first half of “Integrative Biotechnology,” an applied biotechnology course team-taught ... summer 2014, this course combines students from both universities and is taught on ...
Breaking Biology Technology:Pistoia Alliance Launches Startup Challenge 2Pistoia Alliance Launches Startup Challenge 3Apex Therapeutics Presented Company Overview at This Year’s BIO International Convention in Philadelphia, PA 2UCB and Genpact Receive Aecus Innovation Award for Success in Global Business Services 2UCB and Genpact Receive Aecus Innovation Award for Success in Global Business Services 3UCB and Genpact Receive Aecus Innovation Award for Success in Global Business Services 4UCB and Genpact Receive Aecus Innovation Award for Success in Global Business Services 5Rivier University and Beijing City University Academic and Cultural Exchanges Begin 2
... and miRNA Isolation Traditional mRNA isolation ... and can result in the loss of ... miRNA Isolation Kit purifies all RNA species ... Through an enrichment procedure included in the ...
anti-JNK2 Immunogen: Recombinant human JNK2 protein Accession Number: NM_002752 Quality Assurance: Routinely evaluated by immunoblot. Molecular Weight: 46 and/or 54 kDa Available ...
... Clone/PAD: ZMD.330. Immunogen: Synthetic peptide ... of rat and mouse protein kinase C ... the rat and mouse PKCzeta protein. ... does not cross-react with PKCiota/lambda. Reactivity: ...
Lipid-rich bovine serum albumin for cell culture. It is chromatographically purified and has an IgG content 1.0% (w/w)....
Biology Products: