What do scientists of stem cells do?

Scientists of stem cells conduct scientific research of stem cells to better understand and explore their potential for various health and medical purposes. The stem cells found in most multicellular organisms have extraordinary rejuvenation skills that allow them to rebuild whole body tissues or certain specific tissues in the body. Stem cells that can cause whole body tissues are called embryonic stem cells and are found in the inner weight of blastocysts; Blastocyst is an embryo in an early stage. The second type of stem cells is adult stem cells, which are called them to distinguish them from embryonic cells; In fact, they occur throughout the body in adults and children. Pluripotence means that embryonic cells are capable of endless cell division and can still remain undifferentiated. They are able to shape all types of body tissue, except for the placenta. On the other side of multipotent adult stem cells are not so univeRzal and can only form certain types of tissues, usually only the type in which they are found. Adult stem cells act as sets for body repair and restore specialized cells every time they are needed.

Because stem cells are capable of regeneration, they offer great options in medical research. They could be used to repair damaged tissue and replace damaged organs and the treatment of various conditions such as leukemia, multiple sclerosis, cystic fibrosis, diseases of motor neurons and osteoporosis. Scientists from stem cells have achieved the level of success in these efforts, but still much more research of stem cells is needed.

There are two significant problems in using stem cells in medical treatment. First there is a likelihood that the body directly rejects new generated tissues and organs, otherwise the need for taking immune suppressing drugs permanently to prevent immune rejectedand. Second, stem cell scientists have not yet been able to control or predict the way in which stem cell transplantation can divide in the patient's body. There are cases of stem cells dividing out of control, leading to cancer tumors.

While this problem is still studied in a research laboratory, the first problem can be solved by therapeutic cloning. In this scientist, stem cells take DNA from the patient, injure it into a donor egg and cause eggs to divide and form a blastocyst. Stem cell collection is then made of this blastocyst and these stem cells will have the same DNA as the patient. As a result, the patient's body is likely to accept tissues grown from these stem cells and can also be unnecessary to use immune suppressing drugs here.

Another area examined by stem cell scientists is reproductive cloning. Meanwhile sheep, cattle, dogs and other Žers have been successfully cloned and another obvious step is cloning human beings. This research has turned into a controversy, and supporters praised clearly new possibilities in medical research, and opponents rejected what they see as the devaluation of human life. The debate is still ongoing and has influenced stem cell policy in countries around the world. Many countries either directly banned human cloning, or have imposed certain strict restrictions on stem cell research.