XML Feed for RxPG News   Add RxPG News Headlines to My Yahoo!   Javascript Syndication for RxPG News

Research Health World General
 
  Home
 
 Latest Research
 Cancer
 Psychiatry
 Genetics
 Surgery
 Aging
 Ophthalmology
 Gynaecology
 Neurosciences
 Pharmacology
 Cardiology
  Hypertension
  CAD
  Myocardial Infarction
  CHF
  Clinical Trials
 Obstetrics
 Infectious Diseases
 Respiratory Medicine
 Pathology
 Endocrinology
 Immunology
 Nephrology
 Gastroenterology
 Biotechnology
 Radiology
 Dermatology
 Microbiology
 Haematology
 Dental
 ENT
 Environment
 Embryology
 Orthopedics
 Metabolism
 Anaethesia
 Paediatrics
 Public Health
 Urology
 Musculoskeletal
 Clinical Trials
 Physiology
 Biochemistry
 Cytology
 Traumatology
 Rheumatology
 
 Medical News
 Health
 Opinion
 Healthcare
 Professionals
 Launch
 Awards & Prizes
 
 Careers
 Medical
 Nursing
 Dental
 
 Special Topics
 Euthanasia
 Ethics
 Evolution
 Odd Medical News
 Feature
 
 World News
 Tsunami
 Epidemics
 Climate
 Business
 
 India
Search

Last Updated: Nov 18, 2006 - 12:32:53 PM

Circulation

Cardiology Channel
subscribe to Cardiology newsletter

Latest Research : Cardiology

   DISCUSS   |   EMAIL   |   PRINT
Cyclin A2 expression can help regenerate damaged myocardium
Jul 8, 2006 - 9:55:00 PM, Reviewed by: Dr. Rashmi Yadav

"We are examining the potential role of this regenerative strategy as a future therapy for heart failure. Someday, this could lead to less surgery and perhaps even less medicine in treating heart disease."

 
Researchers at the University of Pennsylvania School of Medicine are utilizing a protein to "switch on" the ability to repair damaged heart tissue. By triggering the cell-cycle signal, researchers can manipulate cells in animal models to regenerate damaged heart tissue. If this research is someday successfully translated to humans, it could change the approach to treating heart disease, the nation's leading killer. The findings, now on-line, are in Circulation, the journal of the American Heart Association.

"This is a different concept in terms of how to address heart disease. The classic thinking is to replace a valve, or place a bypass graft. Traditionally, when the heart gets injured, there's dead tissue, and we work our way around it surgically, even replacing the heart with a transplant," explains principal investigator Joseph Woo, MD, Director of the Minimally Invasive and Robotic Cardiac Surgery Program at Penn and Assistant Professor of Surgery. "So we asked, 'What would be the most ideal, natural way of fixing any sort of problem like this?' If you look at nature, the best way is to simply re-grow the tissue. We know that if we take out a piece of the liver, our body has programming to grow it back to how it was."

However, unless the body receives some sort of "jump start," it does not heal dead tissue in the heart. This can have devastating effects. When tissue dies in the heart (for example, due to a heart attack), it is not able to contract and function as effectively to pump oxygenated blood throughout the body, which could ultimately lead to heart failure and death.

Working to better understand how to reverse this damage in humans, Woo first identified the signals in the rat heart that currently prevent the ability to re-grow damaged heart tissue. The researchers then manipulated those signals so the heart could work to regenerate itself.

Specifically, Woo's team investigated myocardial regeneration by initiating heart cell division and replication. They did this by expressing the cell-cycle regulator, a protein called cyclin A2. It is unique in its control at two major transitions of the cell cycle and is the only cyclin that is completely silenced after birth in mice, rats and humans. This approach -- using cyclin A2 expression via gene transfer -- yielded improved myocardial function.

"Penn is the first to do this kind of research with damaged heart tissue, by ramping up the body's native reparative system," states Woo. "We are examining the potential role of this regenerative strategy as a future therapy for heart failure. Someday, this could lead to less surgery and perhaps even less medicine in treating heart disease." Woo cautions that this research work has not yet been done on humans and that we may still be years away from that accomplishment.
 

- The results of this study are now posted on-line in Circulation, the journal of the American Heart Association
 

http://circ.ahajournals.org

 
Subscribe to Cardiology Newsletter
E-mail Address:

 

The results of this study are now posted on-line in Circulation, the journal of the American Heart Association (http://circ.ahajournals.org.) The article is titled "Therapeutic Delivery of Cyclin A2 Induces Myocardial Regeneration and Enhances Cardiac Function in Ischemic Heart Failure." Co-authors are Corinna Panlilio; George Liao; Pavan Atluri; Vivian Hsu; and Jeffrey Cohen of Penn; as well as Richard Cheng and Hina Chaudhry of Columbia University.

This study was funded in part by the National Institutes of Health.

Editor's Notes:

For more information on Penn Cardiac Care, go on-line to:
http://pennhealth.com/cardiac/

Joseph Woo, MD -- on-line bio:
http://www.uphs.upenn.edu/surgery/fac/yjw.html

PENN Medicine is a $2.9 billion enterprise dedicated to the related missions of medical education, biomedical research, and high-quality patient care. PENN Medicine consists of the University of Pennsylvania School of Medicine (founded in 1765 as the nation's first medical school) and the University of Pennsylvania Health System.

Penn's School of Medicine is ranked #2 in the nation for receipt of NIH research funds; and ranked #3 in the nation in U.S. News & World Report's most recent ranking of top research-oriented medical schools. Supporting 1,400 fulltime faculty and 700 students, the School of Medicine is recognized worldwide for its superior education and training of the next generation of physician-scientists and leaders of academic medicine.

The University of Pennsylvania Health System includes three hospitals [Hospital of the University of Pennsylvania; Pennsylvania Hospital, the nation's first hospital; and Penn Presbyterian Medical Center]; a faculty practice plan; a primary-care provider network; two multispecialty satellite facilities; and home care and hospice.




Related Cardiology News

Seven-point system gauges seriousness of heart failure in elderly
Uric acid levels closely related to hypertension in Blacks
American College of Cardiology announces new initiative to improve safety for patients with Acute Coronary Syndromes
Is TROPHY misleading?
Fortified orange juice decreases not only cholesterol but also CRP
Heart Disease: Blame it on genes!
Famotidine may help to slow progression of chronic heart failure
Atherothrombotic disease is not just a 'western' problem
Changing normal heart cells into pacemakers
Ilk gene underlies heart failure


For any corrections of factual information, to contact the editors or to send any medical news or health news press releases, use feedback form

Top of Page

 

© Copyright 2004 onwards by RxPG Medical Solutions Private Limited
Contact Us