WHAT ARE STEM CELLS HOW AND WHY STEM CELLS WILL CHANGE YOUR LIFE
Will it take a genius like da Vinci to unlock the secrets of stem cells
The newspaper headlines scream out at you stem cell breakthrough! stem cell controversy!. Some people swear by them others swear at them. But what are stem cells? Why are they so important and controversial? Are there different types of stem cells? And what kinds of things are researchers hoping to learn about by doing “stem cell research”? In his excellent blog, Dr.David Loeb talks about stem cells. What are they and where are we going?
"First of all, what is a stem cell? To answer that, I’ll start with one of the main principles of modern biology: in every organ in your body, there are cells that are fully developed (differentiated is the term scientists use), and cells that sit in reserve to replace the differentiated cells as they age. Those cells that sit in reserve are unique in their ability to both create copies of themselves (called self-renewal) and to create “daughter cells” that are more differentiated. These “daughter cells” are stem cells".
"Stem cells come in two varieties: the ones that are found in mature organs (like bone marrow) and the ones that are found in a developing embryo and give rise to the entire body. So what are the controversies that surround stem cells? Well, the major controversy is over the source of stem cells that scientists use for their experiments. For example, most people are not concerned about stem cells that are harvested from bone marrow, but they do object to embryonic stem cells that require the destruction of an embryo. I guess it’s obvious why some people find that objectionable but others do not".
"What good are stem cells, anyway? What kinds of things do scientists think they can do with stem cells? I study stem cells. I know many other people who study stem cells. No one I know wants to do what the loudest anti-stem-cell-research voices are shouting about – clone a human. What we do want to do is exploit the potential of these cells to replace broken cells and cure human disease". Read more at:
Watch the Video Everything You Wanted To Know About Stem Cells
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