Talk about stem cells

Keywords: stem cells

Embryonic stem cells

[/]: Embryonic stem cells when the Zygote Division develop into blastocysts, inner cell mass (Inner Cell Mass) of cells for embryonic stem cells. Embryonic stem cells have supernormal, self-renewal and differentiation into all tissues in the body.

Further stated that embryonic stem cells (ES cells) is an undifferentiated cell. It has developed supernormal, dividing out all of the adult animal tissues and organs, including germ cells. Research and utilization of ES cell is the current biological engineering field in one of the core issues. ES cells can be traced back to the 1950s, because teratoma stem cells (EC cells) found that began the study of biology in ES cells.

Currently, many studies are studies in mouse ES cells, such as object: German-American medical teams in last year's success of the transplantations to the test in mice by the ES cells out of glial cells. Since then, Missouri researchers through mouse embryo cells transplantation techniques, paralysed cat restored parts of their activities. At the end of 1998, two research teams successful cultivate human ES cells, keep the ES cells into various cells of the Almighty. This will enable scientists to use human ES cells for the treatment of various diseases. However, human ES cells from research work attracted the world's great controversy, for reasons of social ethics, some countries even forbidden to study human ES cells.

Adult stem cells

Many of the adult animal tissues and organs, such as the epidermis, and haematopoietic system with the ability to repair and regeneration. Adult stem cells play a key role. Under specific conditions, adult stem cells or produce new stem cell, or press a certain program differentiation, the formation of the new features cells, so that the tissues and organs to maintain the dynamic balance between growth and recession. In the past that adult stem cells including epithelial stem cells and hematopoietic stem cells. Recent research shows that, in the past, that cannot regenerate nerve tissue still contains neural stem cells, adult stem cells exist, the question is how to find and isolate all kinds of tissue-specific stem cells. Adult stem cells are often located in a specific micro-environment. Micro-environment of a specific cell — the Leydig cells to produce a series of factors, and stem cell interaction, control of stem cell differentiation of update and.

Hematopoietic stem cells

Hematopoietic stem cells are the body of the only source of blood cells, it is mainly present in the bone marrow, peripheral blood, umbilical cord blood. Hematopoietic stem cell transplant is the treatment of blood diseases, congenital genetic diseases and multiple and Metastatic malignant disease of the most effective method.

In clinical treatment, blood stem cells application earlier, in 1950, the clinic began applying to bone marrow transplantation in the treatment of blood diseases. To the late 1980s, peripheral blood stem cell transplantation techniques gradually spread out, the vast majority for autologous peripheral blood stem cell transplantation, in improving the efficiency and shorten the course treated better than conventional treatment and the evaluation results. And there are cord blood stem cell transplantation is not a source of strength, on HLA matching requirements are not high, less vulnerable to viruses and tumors of the pollution.

Muscle stem cells

Can development into muscle cells, which can be mutually Fusion as multicore muscle fibers, forming the basic structure of the skeletal muscles.

Neural stem cells

Neural stem cells in research on neural stem cells relatively late, due to the separation of neural stem cells in the fetal brain tissue difficult material, coupled with embryonic cells of controversy has not calmed down, neural stem cell research is still in its infancy. In theory, any one of the central nervous system disease can be attributed to the neural stem cell function disorders. Brain and spinal cord because of the existence of the blood-brain barrier to in stem cell transplantation to the central nervous system does not result in rejection, such as Parkinson's syndrome patients to brain cells containing dopamine generate neural stem cells that can cure the symptoms of some patients.