Navigation Links
Scientists learn how insects 'remodel' their bodies between life stages
Date:2/29/2012

It's one of life's special moments: a child finds a fat caterpillar, puts it in a jar with a twig and a few leaves, and awakens one day to find the caterpillar has disappeared and an elegant but apparently lifeless case now hangs from the twig.

Then, when the jar has been forgotten, soft beating against its glass walls calls attention to a new wonder: the jar now holds a fragile-winged butterfly or dusky moth with fringed antennae.

These transformations are so startling that a child's awe seems a more appropriate response than an adult's calm acceptance.

How is it, after all, that an insect can remake itself so completely that it appears to be a different creature altogether, not just once, but several times in its lifetime?

Working with fruit flies rather than butterflies, a team led by Ian and Dianne Duncan of Washington University in St. Louis provides part of the answer in the latest issue of PNAS. Ian Duncan, PhD, is professor of biology in Arts & Sciences; Dianne Duncan is a research associate and director of the Biology Imaging Facility.

The puzzling question

Fruit flies go through three main life phases: the larva, the pupa, and the adult.

Earlier work had shown that the larval and adult forms are patterned by the same "signaling systems," or chains of biochemicals that transfer a signal from receptors on the surface of cells to target genes within cell nuclei.

What scientists didn't understand was how the same signaling systems could orchestrate the formation of a larva in one case and the adult fly in the other.

The Duncans, working with collaborator Eric Baehrecke, PhD, of the University of Massachusetts Medical School and graduate student Xiaochun (Joanna) Mou were able to show that a gene expressed only in the pupal stage redirects signaling systems so that they activate a different set of target genes than in earlier stages.

This gene is itself control
'/>"/>

Contact: Diana Lutz
dlutz@wustl.edu
314-935-5272
Washington University in St. Louis
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Jefferson scientists deliver toxic genes to effectively kill pancreatic cancer cells
2. Scientists identify novel inhibitor of human microRNA
3. Argonne scientists peer into heart of compound that may detect chemical, biological weapons
4. MU scientists go green with gold, distribute environmentally friendly nanoparticles
5. Scientists identify gene that may contribute to improved rice yield
6. Scientists discover why a mothers high-fat diet contributes to obesity in her children
7. MU scientists see how HIV matures into an infection
8. Earth scientists keep an eye on Texas
9. Thinking it through: Scientists call for policy to guide biofuels industry toward sustainability
10. Scientists identify a molecule that coordinates the movement of cells
11. Scientists Find new migratory patterns for Mediterranean and Western Atlantic bluefin tuna
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Scientists learn how insects 'remodel' their bodies between life stages
(Date:7/9/2014)... the oils produced by algae may offer a low-cost ... optimization of cost effective strategies for large-scale algae cultivation, ... Energy has developed an innovative solution to the challenge ... in Industrial Biotechnology , a peer-reviewed journal from ... on the Industrial Biotechnology website . ...
(Date:7/9/2014)... Ill. With over 100 diseases that can attack ... top of the most wanted list? University of Illinois ... that more research is needed on the fungus that ... with cool, damp growing conditions but Macrophomina phaseolina ... and dry drought conditions. , "As the climate continues ...
(Date:7/9/2014)... a sparrow-sized fossil from China challenges the commonly held ... gained the ability to fly. The birdlike fossil is ... rather the remains of a tiny tree-climbing animal that ... Dinosaur Museum in Blanding, Utah, and Alan Feduccia of ... Springer,s Journal of Ornithology . , The fossil ...
Breaking Biology News(10 mins):Controlling contamination in open algae ponds for biofuels 2Climate change provides good growing conditions for charcoal rot in soybeans 2Climate change provides good growing conditions for charcoal rot in soybeans 3Researchers declassify dinosaurs as being the great-great-grandparents of birds 2
... An international research team led by Nanjing Agricultural ... of pear by an approach using the combination of ... only provides an invaluable new resource for breeding improvement ... on the genome evolution and other genome-wide comparative studies. ...
... 19, 2012 Medbox, Inc. (Ticker: MDBX) ( www.medboxinc.com ... they have received many inquiries from shareholders purchasing shares ... week,s volatile trading. These inquiries were responded to and ... rapport. In other news, the company ...
... person imagines moving a limb, cells in the part ... if trying to make the immobile limb work again. ... pathway between brain and muscle, the region where the ... recent years, neuroscientists and neuroengineers working in prosthetics have ...
Cached Biology News:Pear genome provides new insight into breeding improvement and evolutionary trace analysis 2Medbox Communicates with Shareholders, Comments on Pending Transition to OTC Bulletin Board, and Announces Appearance on Fox Business News Channel 2A better thought-controlled computer cursor 2A better thought-controlled computer cursor 3A better thought-controlled computer cursor 4A better thought-controlled computer cursor 5
(Date:1/15/2014)... This webinar will focus on EMA ... assessment in biosimilars. , Regulatory frameworks are evolving many ... however the complex nature of biopharmaceuticals makes the demonstration ... extremely challenging. Based on the specific aspects of biosimilar ...
(Date:1/15/2014)... January 15, 2014 DTS Language Services, ... Online Web Portal for Life Science organizations who need document ... the subject matter of their documents in advance with a ... reduce time-to-delivery of translations, often a critical factor in clinical ...
(Date:1/14/2014)... 2014 Date: Friday, April 11, 2014 , ... Club, 1360 Almshouse Road, Warrington, Pa. , Details: ... dedicated to finding a cure for hepatitis B and improving ... its annual Crystal Ball on Friday, April 11 at Warrington ...
(Date:1/14/2014)... York, NY (PRWEB) January 14, 2014 ... of Alliqua, Inc. (OTCQB: ALQA). Alliqua is an emerging ... to serve the wound care market. , Free report ... was restructured with a seasoned management team and Board, ...
Breaking Biology Technology:Xtalks Life Sciences Webinar Examines Safety Assessment of Biosimilars 2DTS Improves Efficiency for Life Science Document Translations 2Hepatitis B Foundation to Host Annual Crystal Ball Gala 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3
... LA JOLLA, Calif., Feb. 23, 2011 ... to providing personalized treatment information to women with ... been appointed Executive Director, a new position for ... to lead the foundation as it increases its ...
... CITY, Calif., Feb. 23, 2011 Ingenuity® Systems, ... for life science researchers, today announced a research ... for next-generation sequencing (NGS) data analysis. Covance Genomics ... the drug discovery and development industry, and Ingenuity ...
... in German . , Further development of ... at reasonable costs. In the past, integration density of ... of this strategy, future components will have to reach ... Center for Functional Nanostructures (CFN) and IPCMS have now ...
Cached Biology Technology:The Clearity Foundation Hires Hillary Theakston as Executive Director 2The Clearity Foundation Hires Hillary Theakston as Executive Director 3Ingenuity Systems and Covance Collaborate to Support Next-Generation Sequencing Research 2Smallest magnetic field sensor in the world 2
... of SYBR Green I or FAM in ... fluorophores in the second channel including ... a multitude of applications such as RT-qPCR ... offers precision thermal control and a temperature ...
... identification and library manager ... that adds capabilities for ... identification of unknowns against ... of the same taxon ...
Fingerprinting II comparative quantification and polymorphism analysis is an optional module that adds comparative quantification and polymorphism analysis functions to the Fingerprinting II Basic so...
... or for use in an automated line. ... disposable manifold provides greater ease, speed, convenience, ... StatMatic II can be connected to a ... fill a microplate with one-handed operation -- ...
Biology Products: