Navigation Links
Compound developed by scientists protects heart cells during and after attack
Date:2/7/2013

JUPITER, FL, February 7, 2013 Using two different compounds they developed, scientists from the Florida campus of The Scripps Research Institute (TSRI) have been able to show in animal models that inhibiting a specific enzyme protects heart cells and surrounding tissue against serious damage from heart attacks. The compounds also protect against additional injury from restored blood flow after an attack, a process known as reperfusion.

The study, which was led by Philip LoGrasso, a professor and senior scientific director of discovery biology at Scripps Florida, appears in the February 8, 2013 print edition of The Journal of Biological Chemistry.

A heart attack severely restricts blood supply, starving heart cells and surrounding tissue of oxygen, which can cause enormous damage in relatively little timesometimes in just a few minutes. Known as an ischemic cascade, this drop-off of oxygen results in a sudden crush of metabolic waste that damages cell membranes as well as the mitochondria, a part of the cell that generates chemical energy and is involved in cell growth and death.

Unfortunately, restoring blood flow adds significantly to the damage, a serious medical issue when it comes to treating major ischemic events such as heart attack and stroke. Reperfusion re-invigorates production of free radicals and reactive oxygen species that attack and damage cells, exacerbating inflammation, turning loose white blood cells to attack otherwise salvageable cells and maybe even inducing potentially fatal cardiac arrhythmias.

The new study found that inhibiting the enzyme, c-jun-N-terminal kinase (JNK), pronounced "junk," protected against ischemic/reperfusion injury in rats, reducing the total volume of tissue death by as much as 34 percent. It also significantly reduced levels of reactive oxygen species and mitochondrial dysfunction.

In earlier studies, TSRI scientists found that JNK migrates to the mitochondria upon oxidative stress. That migration, coupled with JNK activation, they found, is associated with a number of serious health issues, including liver damage, neuronal cell death, stroke and heart attack. The peptide and small molecule inhibitor (SR3306) developed by LoGrasso and his colleagues blocks those harmful effects, thereby reducing programmed cell death four-fold.

"This is the same story," said LoGrasso. "These just happen to be heart cells, but we know that oxidative stress kills cells, and JNK inhibition protects against this stress. Blocking the translocation of JNK to the mitochondria is essential for stopping this killing cascade and may be an effective treatment for damage done to heart cells during an ischemic/reperfusion event."

In addition, LoGrasso said, biomarkers that rise during a heart attack shrink in the presence of JNK inhibition, a clear indication that blocking JNK reduces the severity of the infarction.


'/>"/>

Contact: Eric Sauter
esauter@scripps.edu
267-337-3859
Scripps Research Institute
Source:Eurekalert  

Related medicine news :

1. TriMix Laboratories Announces New TriMix-gel Partnership with US Compounding
2. Scripps Florida scientists develop new compound that reverses fatty liver disease
3. Women’s Excellence in Bladder Control Partners with University Compounding Pharmacy in Troy, MI to Help Women with Chronic Pelvic Pain Conditions
4. Compounding Pharmacists Oppose Greater U.S. Oversight
5. Taiho Pharmaceutical unveils data on 8 novel anticancer compounds
6. Second Compounding Pharmacy Shut Down in Massachusetts
7. Compounds activate key cancer enzyme to interfere with tumor formation
8. Green tea compound shows promise for tackling cancer
9. Red wine compound could help seniors walk away from mobility problems
10. Breast-Milk Compound May Shield Babies From HIV
11. Natural Sciences Repository Publishes Chromatography and Acidic Compounds Resources
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Compound developed by scientists protects heart cells during and after attack
(Date:10/13/2017)... (PRWEB) , ... October 13, 2017 , ... ... will be giving viewers the lowdown on sciatica in a new episode of ... that focuses on current events and innovation and investigates each subject in-depth with ...
(Date:10/13/2017)... ... October 13, 2017 , ... “America On The Brink”: the Christian history of ... Brink” is the creation of published author, William Nowers. Captain Nowers and his ... veteran, he spent thirty years in the Navy. Following his career as a ...
(Date:10/12/2017)... Orleans, LA (PRWEB) , ... October 12, 2017 , ... ... centers in the U.S., announced today its plans to open a flagship location in ... will occupy the former Rooms To Go store next to Office Depot in the ...
(Date:10/12/2017)... Bethesda, MD (PRWEB) , ... October 12, 2017 , ... ... Award of Excellence to Carol Friedman, PhD, FACMI, during the Opening Session of AMIA’s ... 4 – 8. , In honor of Morris F. Collen, a pioneer in the ...
(Date:10/12/2017)... ... October 12, 2017 , ... Dr. Parsa Mohebi, ... a medical article to the newly revamped Cosmetic Town journal section, ... hair transplant procedure known as Follicular Unit Extraction (FUE). , Dr. ...
Breaking Medicine News(10 mins):
(Date:10/2/2017)... 2, 2017  Eli Lilly and Company (NYSE: ... the third quarter of 2017 on Tuesday, October 24, ... that day with the investment community and media to ... conference call will begin at 9 a.m. Eastern time. ... live webcast of the conference call through a link ...
(Date:9/28/2017)... Cohen Veterans Bioscience and Early Signal Foundation ... and home sensors for real-time monitoring of patients with ... nonprofit organization focused on disruptive health solutions for rare ... system to record and integrate behavioral, cognitive, physiological and ... ...
(Date:9/23/2017)... Janssen Biotech, Inc. (Janssen) announced today that ... U.S. Food and Drug Administration (FDA) for the Biologics ... treatment of moderately to severely active rheumatoid arthritis (RA). ... needed to further evaluate the safety of sirukumab in ... "We are disappointed ...
Breaking Medicine Technology: