Navigation Links
Free radicals may be good for you
Date:2/28/2011

Fear of free radicals may be exaggerated, according to scientists from the Swedish medical university Karolinska Institutet. A new study, published in the Journal of Physiology, shows that free radicals act as signal substances that cause the heart to beat with the correct force.

Free radicals are molecules that react readily with other substances in the body, and this can have negative effects on health in certain circumstances, through the damage caused to cells. Free radicals can be counteracted by substances known as 'antioxidants', which are common ingredients in many dietary supplements. The idea that free radicals are generally dangerous and must be counteracted is, however, a myth, according to scientists who have conducted a new study of the role that free radicals play in heart physiology.

"As usual, it's a case of everything in moderation. In normal conditions, free radicals act as important signal substances, but very high levels or long-lasting increases can lead to disease", says Professor Hkan Westerblad, who has led the study.

When the body is subject to different types of stress, the sympathetic nervous system stimulates receptors known as beta-adrenergic receptors on the surface of heart muscle cells. This leads to several changes inside the cells, one of which is the phosphorylation of proteins. This leads to the contractions of the cells becoming stronger and the heart beats with greater force.

In the current study, the scientists show that stimulation of the beta-adrenergic receptors also leads to increased production of free radicals in the mitochondria of the cells, and these then contribute to stronger contractions of the cells. When the scientists exposed the cells to antioxidants, a major part of the effect of beta-adrenergic stimulation of the heart muscle cells disappeared.

The results reveal a previously unknown regulatory mechanism of the force production in the heart, and may
'/>"/>

Contact: Katarina Sternudd
katarina.sternudd@ki.se
46-852-483-895
Karolinska Institutet
Source:Eurekalert

Page: 1 2

Related medicine news :

1. Plant compound resveratrol shown to suppresses inflammation, free radicals in humans
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/24/2014)... The Traffic and Leads Training ... to help users generate traffic and leads has just ... excitement throughout the internet marketing community. The excitement surrounding ... Tiffany Hendricks prompting a comprehensive review of the course. ... internet marketing will tell you, it can be quite ...
(Date:7/24/2014)... Ticket Down is a reliable source ... at the Sports Authority Field on July 26th. For the ... has brought some of the best club teams from around the ... still being raved about weeks after its completion, fans – new ... of the biggest stars in the world compete. Some of these ...
(Date:7/24/2014)... The report, “Content Delivery Networks (CDN) ... various sub-segments with an in-depth analysis and forecasting ... restraints for this market with insights on trends, ... tables and 36 figures spread through 157 pages ... Market” at http://www.marketsandmarkets.com/Market-Reports/content-delivery-networks-cdn-market-657.html . , Early ...
(Date:7/24/2014)... New York, New York (PRWEB) July 24, 2014 ... of GranuFlo lawsuits ( http://www.injurybeacon.com/granuflo-dialysis/lawsuit/ ) in ... issued a qualified protective order for plaintiff medical ... and Accountability Act. According to the July 16th ... granted attorneys for Fresenius Medical Care ...
(Date:7/24/2014)... (PRWEB) July 24, 2014 In a July ... expert and founder of Lotus Blossom Consulting LLC , ... entitled Three Ways to Cut the High Cost of ... to minimize costs is to maximize your chance of success ... on choosing a clinic. , “I am always happy ...
Breaking Medicine News(10 mins):Health News:Traffic And Leads Training Academy - Review Examining Jeff Johnson’s New IM Course Released 2Health News:Manchester United vs. AS Roma Tickets Denver Sports Authority Field at Mile High: Ticket Down Cuts Ticket Prices for Guinness International Champions Cup Match 2Health News:Manchester United vs. AS Roma Tickets Denver Sports Authority Field at Mile High: Ticket Down Cuts Ticket Prices for Guinness International Champions Cup Match 3Health News:CDN Market by Delivery Technologies & Solutions Expected to Reach $12.16 Billion by 2019 - New Report by MarketsandMarkets 2Health News:CDN Market by Delivery Technologies & Solutions Expected to Reach $12.16 Billion by 2019 - New Report by MarketsandMarkets 3Health News:CDN Market by Delivery Technologies & Solutions Expected to Reach $12.16 Billion by 2019 - New Report by MarketsandMarkets 4Health News:GranuFlo Lawsuits Move Forward in Federal Court, With Issuance of Protective Order for HIPAA Information, Bernstein Liebhard LLP Reports 2Health News:GranuFlo Lawsuits Move Forward in Federal Court, With Issuance of Protective Order for HIPAA Information, Bernstein Liebhard LLP Reports 3Health News:GranuFlo Lawsuits Move Forward in Federal Court, With Issuance of Protective Order for HIPAA Information, Bernstein Liebhard LLP Reports 4Health News:Mindy Berkson, Infertility Expert and Founder, Lotus Blossom Consulting LLC: Leading the Pathway to Parenthood 2Health News:Mindy Berkson, Infertility Expert and Founder, Lotus Blossom Consulting LLC: Leading the Pathway to Parenthood 3
... Elsevier, a world-leading publisher of medical information products and ... Medical Press (PUMP) it has donated over 5,000 books ... The initiative is supported by the Development Centre for ... book donation is in line with the spirit of ...
... Rainbow Kitchen celebrates its 25th year of service to the ... period of economic hardship means that the help the organization ... , The 25th anniversary will be marked with a ... Scott Lammie - UPMC Health Plan,s Chief Financial Officer and ...
... ... Electronic Payment Exchange (EPX), a leading merchant acquirer ... data field encryption best practices provides welcome leadership to merchants, technology ... of data breach. EPX is the first payment processor to offer ...
... ... direct-to-consumer provider of premium dietary supplements, announces the release of their Mediterranean Diet ... ... a leading direct-to-consumer provider of premium dietary supplements, announces the release of their ...
... ... therapy affect integration into society,• Marriage is predicted by height, physical functioning, cognitive outcomes ... Philadelphia ... effects of cancer treatment on physical health, and results of a new study suggest ...
... LAKE CITY, Oct. 7 Utah residents will have access ... tomorrow. The Utah Drug Card is a free discount prescription ... to 75% on prescription drugs at retail pharmacies. All Utah ... printing a card on the program,s website www.utahdrugcard.com ...
Cached Medicine News:Health News:Elsevier's Health Sciences Division and Peking University Medical Press cooperate on book donation 2Health News:Rainbow Kitchen Celebrates 25th Anniversary in Pittsburgh 2Health News:Electronic Payment Exchange Welcomes New Visa Best Practices for Data Field Encryption 2Health News:Electronic Payment Exchange Welcomes New Visa Best Practices for Data Field Encryption 3Health News:Purity Products Releases Their Brand New Mediterranean Diet Resveratrol Formula 2Health News:Survivors of Childhood Cancer Less Likely to Marry 2Health News:Survivors of Childhood Cancer Less Likely to Marry 3Health News:Survivors of Childhood Cancer Less Likely to Marry 4
(Date:7/24/2014)... VIEW, Calif. , July 24, 2014 /PRNewswire/ ... a leading provider of medication and supply management ... a conference call Thursday, July 31, to discuss ... , Omnicell Second Quarter 2014 earnings conference ... 1:30 p.m. PTWho:  , Randall Lipps, chairman, president ...
(Date:7/24/2014)... 24, 2014  IGI Laboratories, Inc. (NYSE MKT: IG), a ... announced its financial results for the second quarter ended June ... , Total revenues of $6.5 million in the second quarter ... in 2013 , Total revenues of $13.3 million for ... 78% over the same period in 2013 , Total ...
(Date:7/24/2014)... -- Many new dentists who are opening their own offices ... practice will be a success. DentalDisposables.net is here to say ... most can make all the difference. Dentistry is a business ... purchasing discount dental supplies can make the difference ... dentists across the United States and ...
Breaking Medicine Technology:Omnicell to Release Second Quarter 2014 Earnings Results on July 31 2IGI Laboratories Announces Second Quarter 2014 Results 2IGI Laboratories Announces Second Quarter 2014 Results 3IGI Laboratories Announces Second Quarter 2014 Results 4IGI Laboratories Announces Second Quarter 2014 Results 5IGI Laboratories Announces Second Quarter 2014 Results 6IGI Laboratories Announces Second Quarter 2014 Results 7Dental Supplies Online is Key to Dental Success...Really! 2
... 6, 2011 In a article published in the August ... Bryan A. Liang, Shapiro Distinguished Professor of Health Law & ... School of Law (CWSL); and Mr. Tim Mackey, Senior Research ... Program at University of California, San Diego – San Diego ...
... The " Global Fetal (Labor & Delivery) ... fetal and neonatal care equipment market by types and studies the ... and neonatal care market across 18 countries in North America, Europe, ... Explore market data tables and in-depth TOC on   ...
Cached Medicine Technology:JMIR Article by IHLS Authors Discusses Global Public Health Implications of Social Media Direct-to-Consumer Advertising by Illicit Online Pharmacies and Private Entities 2MarketsandMarkets: Global Fetal and Neonatal Care Equipment Market Forecast (2011-2016) 2MarketsandMarkets: Global Fetal and Neonatal Care Equipment Market Forecast (2011-2016) 3MarketsandMarkets: Global Fetal and Neonatal Care Equipment Market Forecast (2011-2016) 4
... ARUP Laboratories is a national reference laboratory ... research and development. ARUP offers an extensive ... medical tests in clinical and anatomic pathology. ... Laboratories' clients include more than half of ...
... reference laboratory and a worldwide leader in ... an extensive test menu of highly complex ... anatomic pathology. Owned by the University of ... half of the nation's university teaching hospitals ...
... ARUP Laboratories is a national reference laboratory ... research and development. ARUP offers an extensive ... medical tests in clinical and anatomic pathology. ... Laboratories' clients include more than half of ...
... national reference laboratory and a worldwide leader ... offers an extensive test menu of highly ... and anatomic pathology. Owned by the University ... than half of the nation's university teaching ...
Medicine Products: