Navigation Links
Temple researchers discover key to heart failure, new therapies on horizon
Date:3/5/2013

effectively treat heart failure.

The GRK5 enzyme is a unique member of the GRK family, owing to its presence in the nucleus. Its journey begins at the cell membrane, where signals received by a molecule at the cell surface known as a Gq-coupled receptor prompt "escorts" one of which is calmodulin, as the researchers discovered to attach to GRK5 and guide it to the nucleus.

The team found that GRK5's transport requires calmodulin after examining different places on the enzyme where various escort molecules attach. They then introduced mutations that altered the attachment sites. Only when calmodulin-binding residues on GRK5 were mutated was the enzyme prevented from reaching the nucleus. Those mutations led to dramatic decreases in nuclear GRK5 levels and corresponding declines in the activity of genes known to drive cardiac hypertrophy. Calmodulin's ability to bind to GRK5 is in turn dependent on calcium. The same results were obtained both in vitro, using human heart muscle cells cultivated under laboratory conditions, and in vivo, in mice.

The team's research also marks a breakthrough in scientists' understanding of the role of neurohormones in hypertrophy. Released by specialized neurons into the bloodstream, neurohormones have long been cited as a cause of heart cell enlargement.

"One of the novel findings to fall out of this paper is that not all hypertrophic signals from neurohormones are the same," Koch explained. "That's something to keep in mind as we move forward."

The next step, according to Koch, is to test the ability of different agents to keep GRK5 out of the nucleus. "We are now discussing a trial on inhibition of another cardiac GRK, GRK2," he said. He cautioned, however, that trials in patients with GRK5 inhibition are years away. First, agents capable of blocking GRK5 transport must be identified and tested in animals.

The work is an important advance for Temple's Center for Translational
'/>"/>

Contact: Jeremy Walter
Jeremy.Walter@tuhs.temple.edu
215-707-7882
Temple University Health System
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Losing protein helps heart recover, say Temple scientists
2. Temple-Penn researchers identify calcium accelerator to keep cell power supply going
3. Study by UC Santa Barbara researchers suggests that bacteria communicate by touch
4. UC Santa Barbara researchers discover genetic link between visual pathways of hydras and humans
5. Researchers attempt to solve problems of antibiotic resistance and bee deaths in one
6. UNH researchers find African farmers need better climate change data to improve farming practices
7. Ottawa researchers to lead world-first clinical trial of stem cell therapy for septic shock
8. Researchers uncover molecular pathway through which common yeast becomes fungal pathogen
9. Researchers print live cells with a standard inkjet printer
10. Columbia Engineering and Penn researchers increase speed of single-molecule measurements
11. Researchers reveal how a single gene mutation leads to uncontrolled obesity
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/17/2014)... learned a great deal about complex social behavior by ... something to teach too. , With their unusually large ... parrots live in a complex social environment---not merely in ... or ants, but in a dynamic setting of alliances ... intelligent mammals: dolphins, whales, primates, and social carnivores, like ...
(Date:9/16/2014)... Environmental Health at the Mailman School of Public Health ... asthma and prenatal exposure to two phthalates used in ... in the journal Environmental Health Perspectives . ... higher levels of the chemicals, butylbenzyl phthalate (BBzP) and ... percent increase in risk of developing asthma between age ...
(Date:9/16/2014)... CLEVELAND, Ohio (September 17, 2014)The North American Menopause ... for the comprehensive care of midlife womenon everything ... feature, "The North American Menopause Society Recommendations for ... today in the Society,s journal Menopause . ... recommendations for the care of midlife women freely ...
Breaking Biology News(10 mins):Being social: Learning from the behavior of birds 2Phthalates heighten risk for childhood asthma 2Phthalates heighten risk for childhood asthma 3
... A team of scientists from the University Hospitals of ... bowel diseases have low bone mass and poor bone architecture ... at increased risk of fracture. Inflammatory bowel disease ... inflammation of the bowel. Two of the most common disorders ...
... new study presented today at the World Congress on ... a commonly used injectible contraceptive, is associated with higher ... in combination with estrogens. Depot medroxyprogesterone acetate ... birth control drug which is injected every 3 months. ...
... muscle tissue experiences trauma or disease, such as ... as "satellite cells" respond to repair and regenerate ... neuromuscular diseases, such as muscular dystrophy, which affect ... researchers have used time-lapse photography to document satellite ...
Cached Biology News:Caught on tape: Muscle stem cells captured on video by MU researcher 2
(Date:9/17/2014)... (PRWEB) September 17, 2014 Escape Alert, LLC ... pets which will alert owners if their pet has escaped ... from an implanted microchip in the pet’s body. This is ... for pets have been around for many years, they are ... not able to track a pet’s location or alert the owner ...
(Date:9/17/2014)... September 17, 2014 NASA’s MESSENGER has ... Engineering Corporation is proud to have one of its ... MESSENGER mission is a scientific investigation of the planet ... be sent there, and has provided a vast amount ... V27200 family of latch valves utilize solenoids that also ...
(Date:9/17/2014)... September 17, 2014 The ... , a multi-stakeholder non-profit collaborative building a global ... clinical research, today announced Phase 3 of its ... , Amir H. Kalali, Vice-President, Global Head, ... Bajpai, President, Compliance and Quality Integration (CQI) Consulting ...
(Date:9/16/2014)... 2014 This report analyzes the worldwide markets for ... Hardware, and Biocontent. The report provides separate comprehensive analytics for ... , Europe , Asia-Pacific ... of World. Annual estimates and forecasts are provided for the ... provided for these markets. Market data and analytics are derived ...
Breaking Biology Technology:Implantable Microchip for Pets with GPS Tracking - Patent Filed by Escape Alert, LLC. 2Implantable Microchip for Pets with GPS Tracking - Patent Filed by Escape Alert, LLC. 3Global Standards Initiative for Clinical Research Sites Advances 2Global Standards Initiative for Clinical Research Sites Advances 3Global Standards Initiative for Clinical Research Sites Advances 4Global Bioinformatics Industry 2Global Bioinformatics Industry 3Global Bioinformatics Industry 4Global Bioinformatics Industry 5Global Bioinformatics Industry 6Global Bioinformatics Industry 7Global Bioinformatics Industry 8Global Bioinformatics Industry 9Global Bioinformatics Industry 10Global Bioinformatics Industry 11Global Bioinformatics Industry 12Global Bioinformatics Industry 13Global Bioinformatics Industry 14Global Bioinformatics Industry 15Global Bioinformatics Industry 16Global Bioinformatics Industry 17Global Bioinformatics Industry 18Global Bioinformatics Industry 19Global Bioinformatics Industry 20Global Bioinformatics Industry 21Global Bioinformatics Industry 22Global Bioinformatics Industry 23
... photonics and renewable energy will be the focus of ... to 14, 2009 at McMaster University in Hamilton, Ontario, ... in conjunction with the event. , The 4th Nano ... the 14th Canadian Semiconductor Technology Conference (CSTC2009) will bring ...
... UC Riverside have made an accidental discovery in ... information in computers can be transported or stored. ... electrons possess that makes them behave like tiny ... of spin-based semiconductor technology such as ultrahigh-speed computers. ...
... programs give sponsors easy-to-use tools to store, mine and ... transfer knowledge base to ensure enrollment success, NEWTON, ... technology leader, announced the release of a new,product, "Center ... in-house recruitment capabilities for clinical,trial sponsors. The goal is ...
Cached Biology Technology:Joint nanotechnology forum to focus on electronics, photonics, renewable energy 2Discovery by UC Riverside physicists could enable development of faster computers 2Discovery by UC Riverside physicists could enable development of faster computers 3TCN e-Systems Offers Trial Sponsors Solutions for Creating In-House Center of Excellence in Patient Recruitment 2TCN e-Systems Offers Trial Sponsors Solutions for Creating In-House Center of Excellence in Patient Recruitment 3TCN e-Systems Offers Trial Sponsors Solutions for Creating In-House Center of Excellence in Patient Recruitment 4
Anti-ADAM-12 (Meltrin Alpha); amino terminal region; rabbit host...
Mouse monoclonal [3G8] to MDMA ( Abpromise for all tested applications)....
Fluorescein isothiocyanate (FITC) mouse anti-human IFN-alpha2 25 tests...
Rabbit Anti-melatonin (different linkage) Polyclonal Antibody...
Biology Products: