Navigation Links
Caltech and UCSD scientists establish leech as model for study of reproductive behavior
Date:3/16/2010

nervous system responsible for generating the mating behavior. "One of the attractions of the lower invertebrates is that you can literally cut them in pieces, and each of the pieces will more or less keep performing the function it would have performed in the whole animal," Wagenaar explains.

"We started out studying the behavior of whole animals that we simply injected with the hormone. Then we cut leeches in thirds and injected each part with hormone, and found that the hormone acted only in the central part, which contains the reproductive organs. We then cut open that central part and stretched out the skin so we could study in more detail the muscle contractions underlying the behavior of the whole animal."

"Finally," he says, "we removed the body entirely, keeping just the nervous system, and found that even the disembodied central nervous system"in particular, the ganglia (clusters of nerve cell bodies) located in the reproductive segments of the leech"produced the appropriate nerve signals to generate the pattern of muscle activity we had observed."

"Our next project will be to use voltage-sensitive dyes to record signals from a large fraction of all the neurons in the reproductive ganglia, to find which ones contribute to generating and maintaining the behavior," he adds.

Wagenaar and his colleagues believe these studies establish the leech as a new model system for studying how hormones act on the nervous system to produce mating behavior, and for deciphering the specific neural circuits that control the behavior.

"The knowledge gained from these studies," adds study coauthor Kathleen French of UCSD, "is expected to shed new light on the interactions of hormones and neurons in controlling courtship and reproductive behavior in a wide variety of sexually reproducing species, from the lowly leech to humans in a singles bar."


'/>"/>

Contact: Kathy Svitil
ksvitil@caltech.edu
626-395-8022
California Institute of Technology
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Caltech receives more than $33 million from American Recovery and Reinvestment Act
2. Caltech researchers presenting at AAAS Meeting
3. Caltech researchers obtain first brain recordings from behaving fruit flies
4. Caltech neuroscientists discover brain area responsible for fear of losing money
5. Caltech scientists find emotion-like behaviors, regulated by dopamine, in fruit flies
6. Caltech researchers show efficacy of gene therapy in mouse models of Huntingtons disease
7. Caltech scientists create robot surrogate for blind persons in testing visual prostheses
8. Caltech scientists get detailed glimpse of chemoreceptor architecture in bacterial cells
9. Caltech neuroscientists find brain region responsible for our sense of personal space
10. Caltech researchers explore how cells reconcile mixed messages in decisions about growth
11. Caltech scientists reveal how neuronal activity is timed in brains memory-making circuits
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/28/2014)... (Maximizing Access to Research Careers) Program has announced the ... Genetics from October 18 22, 2014 in San ... the entry of students, post doctorates and scientists from ... community and to encourage the participation of young scientists ... year MARC conferred 16 awards totaling $29,600., The FASEB ...
(Date:8/28/2014)... peer groups and clinicians is critical to the ... University of Georgia research. , A qualitative study ... determined that role models for successful breastfeeding help ... , "Mothers who received that support are more ... co-author Alex Anderson, an associate professor in the ...
(Date:8/28/2014)... to Research Careers) Program has announced the travel ... Medicine,s Conference on Integrative Physiology of Exercise from ... awards are meant to promote the entry of ... into the mainstream of the basic science community ... at the American College of Sports Medicine,s Conference ...
Breaking Biology News(10 mins):Breastfeeding study shows need for effective peer counseling programs 2
... conditions leading to heart attacks and strokes are treated ... or lung, but now turn out to involve some ... This in turn provides clues to more effective therapies ... in these distinct fields to come together. The seeds ...
... DC Although Americans are becoming increasingly aware of ... A in some baby bottles and lead in some ... with personal chemical exposure and related adverse health effects, ... Journal of Health and Social Behavior . ...
... the Nov. 20 edition of Heredity could ... evolution of separate sexes, a theory that holds that ... stages are not completely understood because the majority of ... state too long ago for scientists to observe the ...
Cached Biology News:Mechanisms of cardiovascular disease and cancer give clues to new therapies 2Mechanisms of cardiovascular disease and cancer give clues to new therapies 3Pollution at home lurks unrecognized, instead attributed to large-scale environmental disasters 2Two from one: Pitt research maps out evolution of genders from hermaphroditic ancestors 2
(Date:8/28/2014)... NEW YORK , Aug. ... announces that a new market ... its catalogue: Whole ... (Systems, Kits (Library Preparation, Target ... Technology (Sequencing by Synthesis), by ...
(Date:8/28/2014)... 28, 2014  Armetheon, Inc. ( www.armetheon.com ), ... to late-stage cardiovascular drug candidates, today announced that ... round of financing. The Series A round was ... with participation from investors that included Atheneos Capital ... Larry Hsu , the founder of Impax ...
(Date:8/28/2014)... PrimeSource Building Products, Inc., a ... SoundConnect to support their communication needs with ... web conferencing platform GlobalMeet powered by SoundConnect. The ... SoundConnect delivers award winning “results driven” business ... will be utilizing GlobalMeet powered by SoundConnect ...
(Date:8/27/2014)... BOSTON , Aug. 27, 2014 Rhythm, ... diseases and genetic deficiencies that result in metabolic disorders, ... on Form S-1 with the U.S. Securities and Exchange ... of shares of its common stock. The number of ... the offering have not yet been determined. ...
Breaking Biology Technology:Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 2Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 3Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 4Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 5Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 6Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 7Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 8Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 9Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 10Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 11Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 12Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 13Armetheon Completes $7.0 Million Series A Financing 2Armetheon Completes $7.0 Million Series A Financing 3PrimeSource Chooses SoundConnect as Collaboration Provider 2Rhythm Files Registration Statement for Proposed Initial Public Offering 2
... , , Additions to the Human Protein ... 6,100 antibodies powered by Atlas Antibodies , , ST. ... today announced the release of over 2,300 antibody additions to ... www.sigma.com/prestige ), bringing the total number of highly ...
... Austria, June 23 MIG Fonds and AFFiRiS AG are,this ... Award,competition, hosted by the industry magazine Boerse-Express and Junge,Industrie. The ... the Austrian biotechnology company as well as a euro,430 million ... Last Tuesday MIG Fonds and AFFiRiS AG were awarded ...
... June 22 Trubion Pharmaceuticals, Inc. (Nasdaq: ... of Wyeth (NYSE: WYE ), has exercised ... with Trubion to extend the research period for an ... terms of the research period extension, Wyeth,s obligations to ...
Cached Biology Technology:Sigma-Aldrich and Atlas Antibodies Announce 2,300 New, Highly Validated Prestige Antibodies(RM) 2Sigma-Aldrich and Atlas Antibodies Announce 2,300 New, Highly Validated Prestige Antibodies(RM) 3Sigma-Aldrich and Atlas Antibodies Announce 2,300 New, Highly Validated Prestige Antibodies(RM) 4AFFiRiS AG: 1st Place in Venture Capital & Private Equity Awards for MIG Fonds and AFFiRiS 2AFFiRiS AG: 1st Place in Venture Capital & Private Equity Awards for MIG Fonds and AFFiRiS 3Trubion Pharmaceuticals Announces Extension of Research Period Under Its Wyeth Collaboration 2Trubion Pharmaceuticals Announces Extension of Research Period Under Its Wyeth Collaboration 3
Rabbit polyclonal to CAMK 1D beta ( Abpromise for all tested applications). entrezGeneID: 57118 SwissProtID: Q5SQQ7...
Request Info...
Goat polyclonal to HNF4 ( Abpromise for all tested applications). Antigen: Synthetic peptide: RLSKTLVDMDMADY (Human) N terminal. Entrez GeneID: 3172 Swiss Protein ID: P41235...
Goat polyclonal to SART1 ( Abpromise for all tested applications). Antigen: Synthetic peptide: GSSKKHRGEKEAA, corresponding to N terminal amino acids 2-14 of Human SART1. Entrez Gene ID: 909...
Biology Products: