Navigation Links
Pigeons provide clue to solving common problem in heart patients

Through studying pigeons with genetic heart disease, researchers at Wake Forest University School of Medicine have discovered a clue about why some patients' heart vessels are prone to close back up after angioplasty.

"We identified a regulator of genes that controls the growth of artery smooth muscle cells," said William Wagner, Ph.D., senior researcher. "Learning to modulate the uncontrolled growth of these cells could potentially solve the problem of vessels re-closing after angioplasty."

The work is reported in the August issue of Experimental and Molecular Pathology.

Angioplasty uses a balloon-like device to crush the material blocking an artery. But, within three to six months, even if a stent is placed in the artery to keep it open, the vessel becomes re-blocked in about 25 percent to 30 percent of patients. This process, known as restenosis, has been described as "over exuberant" tissue healing and involves the smooth muscle cells. It is not known why this happens in some people and not in others, but many scientists believe that genes are to blame, Wagner said.

The researchers sought to find the answer in two breeds of pigeons ?one that is genetically susceptible to heart attacks and heart vessel disease (white carneau) and one (show racer) that is resistant. A major difference between the two breeds is that smooth muscle cells from the heart vessels of white carneau pigeons are prone to uncontrolled growth.

"Understanding the factors that play a role in this increased cell growth may provide an opportunity to target its role in both the initial development of artery blockages and in the restenosis following angioplasty," said Wagner, a professor of pathology and fellow of the American Heart Association.

Genes "express," or produce, proteins that are used in building tissue. The process begins with "transcription," or the copying of a gene's DNA sequence.

It is not known which genes might contro l the pigeons' heart vessel tissue-building process, so Wagner's group focused on "transcription factors," which regulate whether a gene is expressed and at what rate. The group's aim was to see if certain transcription factors might be found in altered amounts in the smooth muscle cells of pigeons that are prone to atherosclerosis.

They screened 54 different transcription factors and found that one, known as STAT4, was 10 times higher in the white carneau pigeons with genetic heart disease. Further testing showed that stimulating STAT4 in smooth muscle cells in the laboratory resulted in a threefold increase in cell growth.

"We were very surprised," said Wagner. "This is one of the first reports of this factor being found in smooth muscle cells."

Wagner said the finding has potential for helping scientists solve the problem of restenosis.

"Interfering with these factors and the signaling pathways involving STAT4 may be potentially important in atherosclerosis therapy," he said. "We may identify ways to reduce or block its effect and slow or stop the unwanted growth of cells."

He said that by finding the transcription factor, researchers can concentrate on modifying its pathway, and won't need to know which or how many genes it affects.


'"/>

Source:Wake Forest University Baptist Medical Center


Related biology news :

1. Experiments provide proof of how traveling in groups protects insects
2. Experiments provide proof of how traveling in groups protects insects
3. ASU researchers finds novel chemistry at work to provide parrots vibrant red colors
4. MetaChip provides quick, efficient toxicity screening of potential drugs
5. Alaskan puzzles, monitoring provide insight about North Pacific salmon runs
6. NYU and MSKCC research provides model for understanding chemically induced cancer initiation
7. Nature provides inspiration for important new adhesive
8. Hydrogen and methane provide raw energy for life at Lost City
9. Research may provide new link between soft drinks and weight gain
10. Hopkins AIDS experts issue warning about global efforts to provide drug therapies
11. High-powered gene profiles provide clues to genes involved in common form of lung cancer
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/23/2016)... , March 23, 2016 ... erhöhter Sicherheit Gesichts- und Stimmerkennung mit Passwörtern ... (NASDAQ: MESG ), ein führender ... das Unternehmen mit SpeechPro zusammenarbeitet, um erstmals ... Finanzdienstleistungsbranche, wird die Möglichkeit angeboten, im Rahmen ...
(Date:3/22/2016)... PROVO and SANDY, Utah ... Ontario (NSO), which operates the highest sample volume laboratory ... and Tute Genomics and UNIConnect, leaders in clinical sequencing ... announced the launch of a project to establish the ... panel. NSO has been contracted by ...
(Date:3/18/2016)... , March 18, 2016 --> ... of Biometrics, ICT, Manned & Unmanned Vehicles, Physical infrastructure and ... security companies in the border security market and the continuing ... and Europe has led visiongain to ... improved success. --> defence & security companies ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... 23, 2016   Boston Biomedical , an ... designed to target cancer stemness pathways, announced that ... Orphan Drug Designation from the U.S. Food and ... cancer, including gastroesophageal junction (GEJ) cancer. Napabucasin is ... inhibit cancer stemness pathways by targeting STAT3, and ...
(Date:6/23/2016)... 2016 Houston Methodist Willowbrook Hospital has ... Association to serve as their official health care ... Willowbrook will provide sponsorship support, athletic training services, ... coaches, volunteers, athletes and families. "We ... Association and to bring Houston Methodist quality services ...
(Date:6/23/2016)... , June, 23, 2016  The Biodesign Challenge ... envision new ways to harness living systems and biotechnology, ... Art (MoMA) in New York City ... 130 participating students, showcased projects at MoMA,s Celeste Bartos ... Paola Antonelli , MoMA,s senior curator of architecture and ...
(Date:6/23/2016)... ... June 23, 2016 , ... STACS DNA Inc., the sample ... the Arkansas State Crime Laboratory, has joined STACS DNA as a Field Application Specialist. ... said Jocelyn Tremblay, President and COO of STACS DNA. “In further expanding our capacity ...
Breaking Biology Technology: