HOME >> BIOLOGY >> NEWS
Faulty cell membrane repair causes heart disease

During vigorous exercise, heart muscle cells take a beating. In fact, some of those cells rupture, and if not for a repair process capable of resealing cell membranes, those cells would die and cause heart damage (cardiomyopathy).

Researchers at the University of Iowa Roy J. and Lucille A. Carver College of Medicine have discovered a specific repair mechanism in heart muscle and identified a protein called dysferlin that is critical for resealing heart muscle cell membranes.

The study, led by UI researcher and Howard Hughes Medical Institute investigator Kevin Campbell, Ph.D., also shows that loss of dysferlin causes cardiomyopathy in mice. Furthermore, heart damage in these mice is exaggerated by vigorous exercise or by inherent muscle weakness caused by a muscular dystrophy defect. The results are published in the July 1 issue of the Journal of Clinical Investigation.

Active tissues, like a beating heart or contracting muscle, need mechanisms to repair the inevitable cell membrane tears caused by physical stress and strain. In 2003, Campbell and his colleagues identified dysferlin as a key protein in this vital repair mechanism in skeletal muscle. In humans, dysferlin deficiency -- which leads to faulty muscle membrane repair -- causes three types of muscular dystrophy.

The new study expands knowledge of dysferlin function, showing that dysferlin-mediated membrane repair is also important in heart muscle cells and suggests that inadequate membrane repair can also lead to cardiomyopathy.

"If we could boost this repair mechanism, it might be possible to slow cardiac and skeletal muscle damage in muscular dystrophy patients," said Campbell who also holds the Roy J. Carver Biomedical Research Chair in Molecular Physiology and is head of the department and a UI professor of neurology.

The UI team initially found that young mice that lacked dysferlin showed no heart damage, which is consistent with what is
'"/>

Contact: Jennifer Brown
jennifer-l-brown@uiowa.edu
319-335-9917
University of Iowa
3-Jul-2007


Page: 1 2

Related biology news :

1. Faulty immune-priming cells start autoimmunity
2. Faulty cell cycle checkpoints linked to lung cancer risk in African-Americans
3. Faulty body clock leads to obesity and diabetes
4. Carnegie Mellon scientists find key HIV protein makes cell membranes bend more easily
5. University of Leeds strengthens China links in membrane and neurobiology
6. Semiconductor membrane mimics biological behavior of ion channels
7. Simulations unravel outer membrane transport mechanism
8. Elastic interactions of membrane proteins
9. Biologists prove critical step in membrane fusion
10. Penn scientists engineer small molecules to probe proteins deep inside cell membrane
11. One membrane, many frequencies

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:9/3/2020)... ... 03, 2020 , ... Litmus Health , the research-ready ... of the company’s security practices has been completed. The assessment deemed Litmus infrastructure ... evaluation reviewed Litmus’ processes and systems, assessing them to see whether they adhere ...
(Date:8/23/2020)... , ... August 21, 2020 , ... ... Corporation has been published and is now available on the company’s global ... diffraction—serves the X-ray analysis community, presenting current news and crystallographic research. , ...
(Date:8/12/2020)... , ... August 11, 2020 , ... ... based in Princeton, NJ, have entered into license agreements with Housey Pharma’s HMI ... Both Roche and J&J have annual Research and Development spending in excess ...
Breaking Biology News(10 mins):
(Date:7/7/2020)... ... July 06, 2020 , ... R3 International is now offering stem cell therapy ... stem cells. Depending on the patient's condition, treatment may be offered IV, intrathecal or ... some form of Alzheimers dementia, and the incidence continues to increase as individuals live ...
(Date:7/1/2020)... ... June 29, 2020 , ... ... procured purchasing contracts to its membership, recently named BioFit Engineered Products ... the opportunity to purchase ergonomic seating, cafeteria tables, book trucks and carts at ...
(Date:6/28/2020)... ... 25, 2020 , ... With the COVID-19 pandemic impacting millions ... In an effort to better understand the cellular responses to COVID-19, the digital ... portraying therapeutic compound effects from over 1,600 approved and referenced molecules on SARS-CoV-2-infected ...
(Date:6/23/2020)... ... 23, 2020 , ... Kerafast Inc. , developers of ... the availability of the Delta-G-VSV Pseudotyping System for coronavirus research applications. The system, ... SARS-CoV-2 viral entry and COVID-19 vaccine effectiveness at just biosafety level 2 (BSL-2) ...
Breaking Biology Technology:
Cached News: