Navigation Links
Grasshopper mice are numb to the pain of the bark scorpion sting
Date:10/24/2013

The painful, potentially deadly stings of bark scorpions are nothing more than a slight nuisance to grasshopper mice, which voraciously kill and consume their prey with ease. When stung, the mice briefly lick their paws and move in again for the kill.

The grasshopper mice are essentially numb to the pain, scientists have found, because the scorpion toxin acts as an analgesic rather than a pain stimulant.

The scientists published their research this week in Science.

Ashlee Rowe, lead author of the paper, previously discovered that grasshopper mice, which are native to the southwestern United States, are generally resistant to the bark scorpion toxin, which can kill other animals.

It is still unknown why the toxin is not lethal to the mice.

"This venom kills other mammals of similar size," said Rowe, Michigan State University assistant professor of neuroscience and zoology. "The grasshopper mouse has developed the evolutionary equivalent of martial arts to use the scorpions' greatest strength against them."

Rowe, who conducted the research while at The University of Texas at Austin, and her colleagues ventured into the desert and collected scorpions and mice for their experiments.

To test whether the grasshopper mice felt pain from the toxin, the scientists injected small amounts of scorpion venom or nontoxic saline solution in the mice's paws. Surprisingly, the mice licked their paws (a typical toxin response) much less when injected with the scorpion toxin than when injected with a nontoxic saline solution.

"This seemed completely ridiculous," said Harold Zakon, professor of neuroscience at The University of Texas at Austin. "One would think that the venom would at least cause a little more pain than the saline solution. This would mean that perhaps the toxin plays a role as an analgesic. This seemed very far out, but we wanted to test it anyway."

Rowe and Zakon discov
'/>"/>

Contact: Ashlee Rowe
roweashl@msu.edu
517-432-4468
University of Texas at Austin
Source:Eurekalert  

Page: 1 2

Related biology news :

1. New scorpion discovery near metropolitan Tucson, Arizona
2. Clemson hosting scientists who study devastating diseases
3. Paper-based device could bring medical testing to remote locales
4. Neuron claws in the brain enable flies to distinguish 1 scent from another
5. New Brain Supplement Focus Boost Launches, Boosting Alertness, Memory and Focus
6. Finally mapped: The brain region that distinguishes bits from bounty
7. FPC Awarded new Smartphone DW From Existing Prominent Asian OEM Customer for Launch With Leading US Operator
8. Funding for animal testing alternative
9. First update in a century in testing drugs for elemental impurities
10. CCNY chemists devise new way to prepare molecules for drug testing
11. With early, obvious benefit of a targeted cancer drug, should expensive clinical testing continue?
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Grasshopper mice are numb to the pain of the bark scorpion sting
(Date:9/19/2014)... the sake of fairness per se but in order ... Frans de Waal, PhD, and Sarah Brosnan, PhD, co-authors ... is defined as a negative reaction to unequal outcomes. ... , Their conclusion comes after the co-authors reviewed more ... it is the evolution of forestalling partner dissatisfaction with ...
(Date:9/19/2014)... study shows that legume plants regulate their symbiotic ... that are transmitted through the plant structure from ... of bacteria-holding nodules in the roots. This collaborative ... Institute for Basic Biology, the Graduate University for ... Sustainable Resource Science in Japan. , Legumes, ...
(Date:9/18/2014)... A sleep-promoting circuit located deep in the primitive ... Discovered by researchers at Harvard School of Medicine and ... Sciences, this is only the second "sleep node" identified ... both necessary and sufficient to produce deep sleep. , ... the study demonstrates that fully half of all of ...
Breaking Biology News(10 mins):Evolution of responses to (un)fairness 2Evolution of responses to (un)fairness 3For legume plants, a new route from shoot to root 2No sedative necessary: Scientists discover new 'sleep node' in the brain 2
... number of rivers and lakes are being invaded by exotic ... Such species represent a threat to native species, as they ... the case of the mudsnail Potamopyrgus antipodarum ... and has spread throughout rivers, lakes or streams in Europe, ...
... found that silicone foul release coatings may be an important ... water and hydropower infrastructure. Allen D. Skaja, Ph.D., PCS, of ... metal alloys over three years at Parker Dam on the ... to reduce the rate of mussel settlement, and any attached ...
... Calif. ( www.ucr.edu ) Research by Nosang ... Riverside, Bourns College of Engineering, has enabled a ... that can detect small quantities of harmful airborne ... Economy Corporation company, has completed the prototype which ...
Cached Biology News:Survival without water: A key trait of an aquatic invader to spread 2'Electronic nose' prototype developed 2
(Date:9/20/2014)... (PRWEB) September 20, 2014 MediVet ... to perform a groundbreaking surgery at the specialized Wolvega ... mare's superficial digital flexor tendon was ruptured 90% and ... of injury is a death sentence for a horse. ... stem cell treatments . This revolutionary regenerative ...
(Date:9/19/2014)... to disease risks, the biological characteristics people care most ... for heightthe textbook example of a complex traitattributes like ... multiple genetic and environmental influences, making it challenging to ... geneticists typically mate two individuals that differ in key ... then study their descendents, looking for genes that tend ...
(Date:9/19/2014)... Chips that use light, rather than electricity, to ... and energy efficiency is a growing concern as ... chief components of optical circuits light emitters, ... to build. One promising light source for optical ... optical properties when deposited as a single, atom-thick ...
(Date:9/19/2014)... YORK , Sept. 19, 2014  An entire ... forms of inherited neuropathies – Charcot-Marie-Tooth disease (CMT) – ... and legs, causing extreme muscle atrophy, weakness, and foot ... the US and millions worldwide. CMT is a progressive ... of their legs, requiring mobility devices such as leg ...
Breaking Biology Technology:World’s first tendon replacement using Nanofiber and activated MediVet Stem Cell Fraction 2World’s first tendon replacement using Nanofiber and activated MediVet Stem Cell Fraction 3Want to link genes to complex traits? Start with more diversity 2Toward optical chips 2Toward optical chips 3September is Charcot-Marie-Tooth (CMT) Awareness Month - Scheduled events, activities and important partnerships announced throughout the month! 2
... 15, 2006, the Supreme Court in eBay Inc. v. ... proves infringement should be granted an injunction must be ... (1) irreparable injury; (2) inadequacy of remedies at law; ... The Court rejected the Federal Circuit's approach that an ...
... encounter, we reviewed the list of the leading Big Pharma companies of ... some of the leading pharmaceuticals products and deals of 2005. , ... Product/Company Disease Area ... Lipitor (Pfizer) Cholesterol Reduction $12.9 +6% ...
... Inc., a developer of protein chip technologies, has ... the National Institutes of Health to develop a test ... ,An estimated 50 million Americans suffer from mild to ... especially for children and senior citizens. GenTel's protein chips ...
Cached Biology Technology:Supreme Court decision in eBay case could affect value of patents 2Big Pharma's continued hunger and search for new products 2Big Pharma's continued hunger and search for new products 3Big Pharma's continued hunger and search for new products 4GenTel gets federal grant to develop allergy test 2GenTel gets federal grant to develop allergy test 3
RAT ANTI MOUSE F4/80 ANTIGEN:BIOTIN Immunogen: Thioglycollate stimulated peritoneal macrophages from C57/BL mice...
SHEEP ANTI FLECAINIDE...
ANTI PIG LDH H4...
RAT ANTI MOUSE F4/80 ANTIGEN:BIOTIN Immunogen: Thioglycollate stimulated peritoneal macrophages from C57/BL mice...
Biology Products: