Navigation Links
Healing heart attack victims, one cell at a time

LIVERMORE, Calif. -- By using the amount of carbon 14 in the atmosphere from above-ground nuclear testing in the 1950s and 1960, researchers have determined that cells in the human heart develop into adulthood.

But as humans age, the percentage of new heart cells decreases markedly. By age 25, renewal of heart cells gradually decrease from 1 percent turning over annually to .45 percent by the age of 75. About 50 percent of the heart cells a human is born with will regenerate during a lifetime.

Myocardial damage often results in chronic heart failure because of the loss and insufficient regeneration of heart cells. But this new finding may mean that patients, who have suffered myocardial damage as a result of a heart attack, may have some good news.

Lawrence Livermore National Laboratory scientist Bruce Buchholz with colleagues from the Karolinska Institute, Universit Claude Bernard Lyon, Lund University and Lund University Hospital, found that cells in a human heart can develop into adulthood and the age of heart cells is, on average, six years younger than the individual.

Using the Laboratory's Center for Accelerator Mass Spectrometry, Buchholz measured the amount of carbon 14 in DNA to establish the age of caridiomyocytes (cardiac muscle cells) in humans.

Carbon 14 atmospheric concentration levels remained relatively stable until the Cold War, when above-ground nuclear bomb tests caused a sharp increase, or peak, which decreased slowly after the end of above-ground testing in 1963. This spike in carbon 14 in the atmosphere serves as a chronometer of the past 55 years.

Because DNA is stable after a cell has gone through its last cell division, the concentration of carbon 14 in DNA serves as a date mark for when a cell was born and can be used to date cells in humans.

The team determined the ages of heart cells by determining the time at which the sample's carbon 14 concentration corresponded to the atmospheric concentration. Buchholz found that people born around or after the nuclear bomb tests corresponded to atmospheric concentrations several years after the subjects' birth, indicating substantial postnatal DNA syntheses.

"By analyzing individuals born at different times before 1955, it is possible to establish the age up to which DNA synthesis occurs, or whether it continues beyond that age," Buchholz said.

In the study, carbon 14 concentrations were elevated in subjects compared to those people born up to 22 years before the beginning of nuclear bomb tests.

"DNA of myocardial cells is synthesized many years after birth, indicating that cells in the human heart do, in fact, renew into adulthood," Buchholz said. "At the age of 50, 55 percent of the heart's cells remain from the time around birth and 45 percent have been generated later."

Cardiac muscles have a striated appearance and their contraction in the heart propels blood from the atria and ventricles to the blood vessels of the circulatory system.

The limited recovery in humans after a heart injury, such as a heart attack, demonstrates failing regeneration of heart cells. But the team concluded that the renewal of heart cells, as indicated by the mixing of carbon 14 in the DNA, suggest that the development of pharmacological strategies to stimulate this process may be a rational alternative or complement to cell transplantation strategies for heart cell replacement.


Contact: Anne Stark
DOE/Lawrence Livermore National Laboratory

Related medicine news :

1. Swelling After Knee Injury May Hinder Healing
2. Data from Patient Subsets of e-HEALING, a Worldwide Registry, Support Use of OrbusNeichs Genous(TM) Bio-Engineered R Stent(TM) as Alternative to Drug- Eluting Stents
3. Retired NYPD Lieutenants William E. Keegan, Jr., Owen McCaffery and John Moran and Tom Thees, a former COO in the financial industry, announce today the formation of H.E.A.R.T (Healing Emergency Aid Response Team) 911.
4. Cleveland Clinic Press Releases Journal-Writing Book Write for Life: Healing Body, Mind, and Spirit Through Journal Writing by Sheppard B. Kominars, Ph.D.
5. LOreal Paris Celebrates Ten Years of Hope and Healing
6. Newer Antibiotic Speeds TB Healing
7. The Well Life Center in Mesa Unveils The 10 Healing Secrets to Health & Longevity Lecture. Proceeds Benefit The Arizona Special Olympics
8. PEAK Surgical Announces Positive Surgical Incision Wound Healing Results With the PEAK PlasmaBlade(TM)
9. The Well Life Center in Mesa Continues The 10 Healing Secrets to Health & Longevity Lecture. Proceeds Benefit The Arizona Special Olympics
10. The Healing Power of Green
11. New Yorkers Deserve Access to Spiritually Based Healing
Post Your Comments:
(Date:11/27/2015)... ... ... According to an article published November 6th by The Telegraph, ... British Columbia suggested that laws requiring bicyclists to wear helmets may not actually decrease ... reason for the controversial conclusion is that, while helmets have certainly prevented a great ...
(Date:11/27/2015)... ... 27, 2015 , ... "When I was traveling, I was ... N.J. "Many people catch diseases simply from sitting on such dirty toilet seats. ... from germs." , He developed the patent-pending QUDRATECS to eliminate the need to ...
(Date:11/27/2015)... , ... November 27, 2015 , ... ... of progress through sharing, the 2016 Building Better Radiology Marketing Programs ... will begin on Sunday, March 6, 2016, at Caesars Palace in Las Vegas ...
(Date:11/27/2015)... (PRWEB) , ... November 27, 2015 , ... CBD ... Accreditation of Allied Health Education Programs (CAAHEP) awarded accreditation to its Diagnostic Medical Sonography ... CAAHEP accredited colleges, as only one of twelve colleges and universities in the state ...
(Date:11/26/2015)... , ... November 26, 2015 , ... ... abuse located in central Michigan, have come together on Thanksgiving Day to share ... video, available for viewing on the Serenity Point YouTube channel, patients displayed what ...
Breaking Medicine News(10 mins):
(Date:11/26/2015)... PUNE, India , November ... --> ... / personal emergency response system ... grow steadily for 5 years ... growing region expected to see ...
(Date:11/26/2015)... WILMINGTON, North Carolina , 26 november ... Laboratories, Inc. (AAIPharma/CML) kondigt de geplande investering ... de uitbreiding van de laboratoria en het ... . De uitbreiding zal resulteren in ... waarmee wordt voldaan aan de groeiende behoeften ...
(Date:11/26/2015)... Nederland, November 26, 2015 ... Een nieuwe aanpak combineert immunotherapie met Bremachlorin-photodynamische ... ) --> ...      (Photo: ) ... Universitair Medisch Centrum (LUMC) blijkt ...
Breaking Medicine Technology: