Navigation Links
Slowing the Racing Heart

Researchers at the University of Illinois at Chicago explain in the May 11 issue of Circulation Research how an enzyme acts on the heart's pacemaker to slow the rapid beating of the heart's "fight-or-flight" reaction to adrenaline.

A single cell in the upper right chamber is responsible for setting the pace of the beating heart, triggering its neighbor cells to beat. In the human heart, one cell - the pacemaker cell - beats faster or slower to induce a rhythmic heartbeat that varies to increase or decrease the blood flow to the body as we eat, sleep or exercise.

"Disturbances of pacemaker control are common in heart diseases. When the heartbeat becomes non-rhythmic and chaotic, it can result in fatal arrhythmias and stroke," said R. John Solaro, UIC distinguished university professor and principal investigator of the study.

Current treatment of arrhythmia requires destruction of tissue surrounding a chaotic pacemaker, followed by insertion of a mechanical pacemaker that can regulate the heartbeat.

"Understanding the molecular regulation of the heart's pacemaker opens the possibility of less drastic treatment options, including drug interventions," said Solaro, who is also director of the center for cardiovascular research and head of physiology and biophysics at UIC.

Solaro worked with Yunbo Ke, UIC research assistant professor of physiology and biophysics and first author of the paper, and colleagues in England at Oxford and Manchester on characterizing and isolating the pacemaker cell.

The UIC researchers demonstrated that an enzyme called Pak 1, present in high concentrations in the heart, signals depression in the action of adrenaline and adrenaline-like chemicals on the pacemaker cell, playing an important role in slowing down the heart rate.

"The enzyme works through calcium and potassium channels that we know to be key players in the generation and regulati on of the pacemaker activity," said Ke.

"Although adrenaline and other mechanisms that accelerate the heart rate have been well studied, mechanisms that might act as a brake are poorly understood," said Solaro.

"Identification of this previously unknown molecular mechanism for slowing the heartbeat may offer new avenues of diagnosis, drug design and treatment of many common heart diseases," said Solaro.

"Further, now that we know something of how this enzyme works in the pacemaker cell, we may discover it is involved in the regulation of other processes, particularly in the brain, where it is also highly expressed," added Ke.


'"/>




Related medicine news :

1. Slowing Down The Progression Of Alzheimer’s Disease
2. Slowing Down The Progression Of Tumour Cells With Omega-6 Fatty Acids
3. Slowing Cartilage Loss In Arthritis With Fruit Extracts
4. NHS Food Slowing Patient Recovery
5. New Drugs Shows Promise in Slowing the Progression of Prostate Cancer
6. Slowing the Racing Heart
7. One in Three Heart Attack Patients Have No Chest Pains
8. Epileptic Seizures Can Be Duec to Heart Problem
9. Bypass Heart Surgery Performed Without General Anesthesia
10. New CPR Guidelines issued by Heart Association
11. White Cells Count Can Predict Heart Attack Death Risk
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/24/2016)... ... June 24, 2016 , ... People across the U.S. are ... Code Talker Award, an essay contest in which patients and their families pay tribute ... presented at the 2016 National Society of Genetic Counselors (NSGC) Annual Education Conference (AEC) ...
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... ... Living, is proud to recognize Dr. Barry M. Weintraub as a prominent plastic ... most beautiful women in the world, and the most handsome men, look naturally ...
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... ... is actively feeding the Frederick area economy by obtaining investment capital for emerging ... the past 2½ years that have already resulted in more than a million ...
(Date:6/24/2016)... D.C. (PRWEB) , ... June 24, 2016 , ... ... Heroes Golf Classic Tournament held on June 20th at the Woodmont Country Club ... charity, Luke’s Wings, an organization dedicated to helping service members that have been wounded ...
(Date:6/24/2016)... ... June 24, 2016 , ... ... upcoming 2016 Miss Arizona pageant as its official Medspa Sponsor. Dr. Josh Olson, ... and Chandler, Arizona. , Dr. Olson says the decision to support the ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... June 23, 2016 Research and Markets ... Medical Market Analysis 2016 - Forecast to 2022" report ... The report contains up to date financial data derived from ... of major trends with potential impact on the market during ... market segmentation which comprises of sub markets, regional and country ...
(Date:6/23/2016)... , June 23, 2016 Bracket , a ... its next generation clinical outcomes platform, Bracket eCOA (SM) ... on June 26 – 30, 2016 in Philadelphia ... electronic Clinical Outcome Assessment product of its kind to fully ... Bracket eCOA 6.0 is a flexible platform for ...
(Date:6/23/2016)... , June 23, 2016  Astellas today announced the establishment of Astellas Farma Colombia (AFC), a new affiliate ... in Latin America . ... ... ... ...
Breaking Medicine Technology: