Navigation Links
CSHL scientists identify a mechanism that helps fruit flies lock-in memories
Date:3/28/2008

Synapses are the tiny gaps across which information crosses between nerve cells. Changes in the strength of synaptic connections, called plasticity, play a vital role in both memory formation and learning, and help determine how nerve signals propagate.

Assistant professor Josh Dubnau, Ph.D., leads a CSHL neuroscience lab that studies learning and memory in fruit flies, or Drosophila. His team had previously identified a group of fly genes needed for memory formation, including one called Pumilio. A similar gene is present in humans, so studying Pumilio in the fly brain could help researchers understand how memory works in the human brain.

A Fruitful Hypothesis

Prior work had shown that Pumilio acts with other genes to shape the developing fly embryo, by modifying how much of various proteins is made in different regions of a cell. Dr. Dubnau hypothesized that the gene acts similarly to affect memory formation.

To further explore this idea, Dr. Dubnau collaborated with CSHL Professors Michael Zhang, Ph.D., a computational biologist, and Adrian Krainer, Ph.D., an expert on gene expression. He posed a question to Dr. Zhang that called for sophisticated mathematical analysis: For 151 genes known to be active in synapses, which of the protein-precursors they produce were most likely to interact with Pum, the protein made by Pumilio? Back in the laboratory, Dr. Krainers team confirmed that Pum interacts with several of the protein-precursors identified by Dr. Zhangs team, including one arising from a gene called dlg1. A gene very similar to dlg1 acts in synapse formation in mammals.

Testing the Result in Living Flies

What about the fly? Dr. Dubnaus lab performed the final step. They genetically engineered flies that made especially large amounts of Pum protein in a brain region called the mushroom body where memory storage occurs. They then confirmed that, in such flies, the protein product of the dlg1 gene was dramatically reduced in this brain region. This observation supports the notion that Pumilio helps build memories by selectively altering individual synapses.

The current work is particularly satisfying, Dr. Dubnau noted, because the original hypothesis about Pumilio was extended by computations to make further predictions, which were then brought full circle and tested in vitro, in the lab and in vivo, in living flies. "It's the kind of interdisciplinary collaboration that Cold Spring Harbor is very good at," he observed.


'/>"/>

Contact: Jim Bono
pubaff@cshl.edu
516-367-8455
Cold Spring Harbor Laboratory
Source:Eurekalert

Related biology news :

1. UK scientists working to help cut ID theft
2. Scientists show that mitochondrial DNA variants are linked to risk factors for type 2 diabetes
3. Comet probes reveal evidence of origin of life, scientists claim
4. Scientists link fragile X tremor/ataxia syndrome to binding protein in RNA
5. Male elephants get photo IDs from scientists
6. Scientists retrace evolution with first atomic structure of an ancient protein
7. Muscle mass: Scientists identify novel mode of transcriptional regulation during myogenesis
8. Carnegie Mellon scientists develop nanogels that enable controlled delivery of carbohydrate drugs
9. Clemson scientists shed light on molecules in living cells
10. Scientists tackle mystery mountain illness
11. T. rex quicker than Becks, say scientists
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/22/2016)... , January 22, 2016 ... the addition of the  "Global Behavioral ... offering. --> http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) ... "Global Behavioral Biometric Market 2016-2020"  report ... Research and Markets ( http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) has ...
(Date:1/20/2016)... Jan. 20, 2016  Synaptics Incorporated (NASDAQ: ... solutions, today announced sampling of S1423, its newest ... and small screen applications including smartwatches, fitness trackers, ... round and rectangular shapes, as well as thick ... with moisture on screen, while wearing gloves, and ...
(Date:1/11/2016)... , Jan. 11, 2016 Synaptics Incorporated ... interface solutions, today announced that its ClearPad ® ... (TDDI) products won two separate categories in the 8 ... Innovator and Best Technology Breakthrough. The Synaptics ® ... a simplified supply chain, thinner devices, brighter displays and ...
Breaking Biology News(10 mins):
(Date:2/11/2016)... New York, NY (PRWEB) , ... ... ... International (BPI), a business-to-business publication dedicated to delivering cutting-edge information focused on ... GE Healthcare Life Sciences to become a premier sponsor of the 2016 ...
(Date:2/11/2016)... WASHINGTON , Feb. 11, 2016   BioInformant ... strategic report, "Stem Cell Research Products, Opportunities, Tools, and ... 2020. ... specialize in the stem cell industry, BioInformant has more ... of the stem cell market, by stem cell type. ...
(Date:2/11/2016)... ... , ... Global Stem Cells Group, has announced ... new facility will provide advanced protocols and state-of-the-art techniques in cellular medicine, focusing ... The new GSCG clinic is headed by four prominent Ecuadorian physicians, including Pablo ...
(Date:2/10/2016)... -- The Maryland House of Delegates and House Speaker ... Maryland School of Medicine Dean E. Albert Reece ... System President and CEO Robert Chrencik , MBA, ... given to the public by the leader of the ... and Mr. Chrencik for their contributions to our statewide ...
Breaking Biology Technology: