heart muscle can be updated

enelitian led by Swedish scientists found that cell-cell heart muscle, we can update during our lives, not limited at the time of birth only. They believe this discovery opened the door of handling that can damage the heart of the network with new cells. Studies conducted by Professor Jonas Frisen and kolegenya from Karolinka Institute in Sweden published in this journal Science April 3 edition.

The researchers take advantage of the fact that carbon-14 generated from nuclear bomb testing during the cold war can be entered into the DNA, including to the cells in heart muscle (kardiomiosit). This can be used to measure the age of cells in the human heart muscle.

Using this approach, Frisen and colleagues found that cell-cell heart muscle gradually renew itself for life and to decrease the speed when we get old of 1% cells of the heart is replaced per year at the age of 25 and this is a 0.45 decrease in the age 75.

They also found that during the normal life of the age, less than 50% of cell-cell heart muscle is replaced. Frisen and colleagues explain that this could open the door on the handling of the disease jantungyang replace the damaged cells to stimulate the process of renewal heart cells.


Dr. Charles Murry, a researcher at the University of Washington in Seattle, who wrote a similar case, commented that the findings of this study is one of the most important in the field kardiovaskular. According to him, the dogma that there are dead cells with the same time was born and is still taught in medical schools. However, this study helps remove the controversy that has been longstanding.

Using radioactivity to measure how quickly cells replace the idea is not new. scientists use this method by placing the animal cells radioactive so they can measure the speed of replacement cells. Use this action in humans is not ethical. However, Frisen and colleagues tested the idea to get nuclear weapons until the year 1963 that will effectively remove radioactive isotope into the atmosphere, and then to masuik in the food chain and in humans.

Radioactive isotope release radioaktivitasnya gradually disintegrate over time and become a normal form senyawanya. ago, carbon-14 gradually release nutron in the form of a core and stabilnya, carbon 12.

When the cells split menbentuk they contain DNA and carbon 14. If we mention the theory of old dead cells with the same heart when we are born with is true, then those who are born before 14 carbon obtained from the food chain (the nuclear test has not started until 1955) will not have the carbon 14 in the heart. But, no such results. The researchers can also find out the age at exposure and how long they have been exposed.