Navigation Links
For fish, fear smells like sugar
Date:2/23/2012

When one fish gets injured, the rest of the school takes off in fear, tipped off by a mysterious substance known as "Schreckstoff" (meaning "scary stuff" in German). Now, researchers reporting online on February 23 in the Cell Press journal Current Biology have figured out what that scary stuff is really made of.

Within that chemical brew is a special type of sugar found in abundance in fish skin. When a fish is wounded, fragments of the sugar known as chondroitin sulfate alarm other fish nearby.

"Our results provide a solution to a 70-year-old puzzle: the nature of this alarm signal," says Suresh Jesuthasan of A*Star's Neuroscience Research Partnership and the Duke/National University of Singapore Graduate Medical School in Singapore.

Chondroitin sulfate is a major component of fish skin, he said, and its breakdownlikely triggered by enzymes released upon injuryseems to be the key.

The new study shows that Schreckstoff and these sugar fragments register in a particular part of the zebrafish brain. That region in the scent-processing olfactory bulb includes an enigmatic class of sensory neurons known as crypt cells.

The researchers suggest that those neurons may be specialized to detect the sugary alarm cue. "This region of the olfactory bulb has unique projections to higher centers of the brain," Jesuthasan says, "so there may be a special circuit mediating aspects of the innate fear response."

The findings identify a new class of odorants for fish. It also helps to explain how this "danger" signal might have evolved even though the signal offers no particular benefit to its sender. Those sugar fragments are naturally released upon injury, whether anyone can smell them or not. Fish able to pick up the scent and flee are more likely to survive and reproduce.

Puzzles remain, however. For instance, some fish species will sense alarm cues released from closely related species but respond les
'/>"/>

Contact: Elisabeth (Lisa) Lyons
elyons@cell.com
617-386-2121
Cell Press
Source:Eurekalert

Page: 1 2

Related biology news :

1. A small step for lungfish, a big step for the evolution of walking
2. One fish, two fish reef fish
3. One fish, two fish … reef fish
4. Magnetic attraction for fish, crabs?
5. Undesirable evolution can be reversed in fish, Stony Brook University scientists show
6. UNH researchers studying spiny dogfish, Gulf of Maines mini shark
7. Historical photographs expose decline in Floridas reef fish, new Scripps study finds
8. Ocean fish farming harms wild fish, study says
9. Carbonized coffee grounds remove foul smells
10. Smells may help birds find their homes, avoid inbreeding
11. Researchers unlock new secret to how smells are detected
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/6/2014)... Insilico Medicine, Inc, a Baltimore-based bioinformatics company focused ... announced a research collaboration with the international leader ... (OTC: CSBR). , "There are many companies utilizing ... Oncology,s TumorGraft technology is unique in a way ... generating vast amounts of valuable data. Our bioinformatic ...
(Date:11/4/2014)... the right amount of death at the right time ... to new research that could help in understanding animal ... , In a paper in the journal Trends ... and European colleagues conclude that the kind of positive ... of individuals, or mortality, depends on the size and ...
(Date:11/4/2014)... of Madagascar,s 101 species of lemurs are threatened with ... rainforests they call home. A new study by Rice ... on rainforest tree populations, which raises concerns about the ... rich biodiversity. , A large proportion of trees in ... in turn disperse the seeds of their fruit trees ...
Breaking Biology News(10 mins):Insilico Medicine, Inc announces research collaboration with Champions Oncology, Inc 2When less is more: Death in moderation boosts population density in nature 2Gardeners of Madagascar rainforest at risk 2Gardeners of Madagascar rainforest at risk 3
... Rochester Medical Center have uncovered a promising drug therapy ... Batten disease a rare neurodegenerative disease that strikes ... to see, reason and move, and ultimately kills them ... the January edition of Experimental Neurology, explains how investigators ...
... to eat at the holidays: Dont take your cues from ... Pole resident eats are a no-no. But you dont have ... University of Florida researchers say. In fact, many ... according to findings from a UF paper published recently in ...
... work better on some children than on others, but judging ... no simple task. Now researchers have developed a new mathematical ... treat children who are abnormally short for a wide range ... access journal BMC Medical Informatics and Decision Making describes a ...
Cached Biology News:Research unveils new hope for deadly childhood disease 2Too much fructose could leave dieters sugar shocked 2Too much fructose could leave dieters sugar shocked 3
(Date:11/22/2014)... Chicago, IL (PRWEB) November 21, 2014 ... technology competitors at the 2014 Emerging Medical Technologies Summit ... MedTech Innovator Awards. Widely regarded among Silicon Valley ... emerging medical device innovation, the win also positions Briteseed ... the MedTech Innovator competition in 2015 and compete with ...
(Date:11/22/2014)... Rapids, MI (PRWEB) November 22, 2014 ... opportunity to simulate the proper management of life-like ... and test lung devices . Grand Rapids-based, Michigan ... plans to donate two of the respiratory simulation ... to $15,000 each. Grand Valley and Muskegon Community ...
(Date:11/22/2014)... , November 21, 2014 ... wechselt als Chief Commercial Officer zu KLOX    ... der Unternehmensentwicklung und Chief Financial Officer bestellt    ... mit der Vermarktung seines jüngst zugelassenen Behandlungssystems zur Wundheilung ... ("KLOX" bzw. das "Unternehmen") ist sehr erfreut, die folgenden ...
(Date:11/21/2014)... --  TRU-D SmartUVC LLC and its UK partners, Rapid ... robot, TRU-D SmartUVC, at FIS 2014 in Harrogate, ... at Stand 23. The conference, hosted by Federation ... largest infection-related event of its kind and brings together ... leading events of its type throughout the world. This annual ...
Breaking Biology Technology:Insight Product Development Accelerator Member Wins MedTech Innovator Award Competition 2Insight Product Development Accelerator Member Wins MedTech Innovator Award Competition 3Michigan Instruments Donates Two Respiratory Simulation Training and Test Lung (TTL) Devices to Grand Valley State University 2Michigan Instruments Donates Two Respiratory Simulation Training and Test Lung (TTL) Devices to Grand Valley State University 3KLOX Technologies meldet Neubesetzung von Führungspositionen 2KLOX Technologies meldet Neubesetzung von Führungspositionen 3KLOX Technologies meldet Neubesetzung von Führungspositionen 4KLOX Technologies meldet Neubesetzung von Führungspositionen 5TRU-D SmartUVC to Showcase Superbug-Killing Robot at FIS 2014 2TRU-D SmartUVC to Showcase Superbug-Killing Robot at FIS 2014 3
... ... with the Gwendolyn Strong Foundation on a fundraising campaign for spinal muscular atrophy gene ... (PRWEB) ... for SMA gene therapy, “Realizing the Dream.” FightSMA is collaborating with the Santa ...
... CHICAGO , July 8 Advanced Life Sciences Holdings, ... discovery, development and commercialization of novel drugs in the therapeutic areas ... preclinical toxicology and pharmacokinetic studies of an intravenous (IV) formulation of ... setting. , , , ...
... SAN FRANCISCO , July 7 The Real Staffing Group, a ... launched new offices in New York and San Francisco . ... this occasion by launching a new app for the iPhone. This app provides ... and Europe . , , ...
Cached Biology Technology:FightSMA Launches Gene Therapy Fundraising Campaign: “Realizing the Dream” 2FightSMA Launches Gene Therapy Fundraising Campaign: “Realizing the Dream” 3FightSMA Launches Gene Therapy Fundraising Campaign: “Realizing the Dream” 4Advanced Life Sciences Announces Successful Preclinical Data Supporting Restanza Intravenous Formulation for Hospital Use 2Advanced Life Sciences Announces Successful Preclinical Data Supporting Restanza Intravenous Formulation for Hospital Use 3Advanced Life Sciences Announces Successful Preclinical Data Supporting Restanza Intravenous Formulation for Hospital Use 4A Real First for Pharma Jobs Across the Globe 2
... expression vectors, we in-troduced a new concept, namely ... tran-scriptional level at the T7 phage promoter, and ... the plasmid copy number, The main advantage of ... practically all of the outstanding features of the ...
... Anti Nop1p/Fibrillarin (monoclonal) Nop1p/Fibrillarin ... protein of bakers yeast, Saccharomyces cerevisiae ... essential for yeast viability and is ... homologue of Nop1p is fibrillarin (accession ...
... protein crystallography involves using many of the ... The liquid handling requirements are similar to ... crystallography plates have 24 or 48 wells ... For higher throughput, the number of wells ...
... The Reverse-iT™ One-Step Kit is the ... in RT-PCR. It has been specifically ... The Reverse-iT™ One-Step Kit combines ... and ABgene®s Thermoprime Plus DNA Polymerase ...
Biology Products: