Scientists were able to multiply human stem cells outside the body
Two different scientists have succeeded in isolating human stem cells from embryos and multiplying over a long time in a cell culture. From stem cells arise by differentiation, so by enabling or deactivating certain genes, all specialized cells in our body. This way, the first step is done, destructed or damaged cells or whole organs to breed in a scary to plant them sick or old people again. In the future, however, transplantation of organs, even from existing, as illegally happened, or even a penis, what an Italian doctor intends to become unnecessary. However, the scientists are involved that there were still a few years to last until people can actually receive refined cells or even tie as a substitute – and then bubbles the unbearable source of money of the Biotech company involved.
The scientists have applied different methods for breeding of human embryonic stem cells. The team of James A. Thomsom from the University of Wisconsin-Madison stem cells, as they write in the magazine Science, from human blastocytes, a ball of approximately 140 cells, which arise in the course of embryogenesis a few days after birth. For the experiment they used blastocytes, which were created in the course of an in vitro fertilization, but were not used by the mother. From the blastocytes, they removed the inner embryo trays, which were then attached to fibrilasts of mats that serve as nutrient cells. Every two weeks, the stem cells were set to new nutboden and thus remained in the undifferentiated state on months in the undifferentiated state, thus retained their potentiality to transform into all cell types. "These cells differ from all other human stem cells that have been isolated until today", Says James Thomson. "The origin of all cell types is the rough promise in which transplant medicine, the search and development of medicines and the exploration of human developmental biology can be used."
Various stages of stem cells – University of Wisconsin-Madison
Thomson’s Group, whose results were published in the Proceedings of the National Academy of Sciences, achieved evidence that the cells they have to have continued to cope with specialized cells. The human stem cells were taken in mausa with a trained immune system, where they grew to different cell ties.
The John Gearhart team of John Hopkins Medical Institutions brought themselves to primordial germ cells from which five-sperm sperm and oocytes had developed from abovementioned embryos, they also also added to connective tie cells of Mines and influenced growth factors. This also developed stem cells under certain conditions. Dear the Stem Cells In the Narrowung Furnace, then small, further differentiated cell groups (Ectoderm, Enodern and Mesoderm), from which the different human cell types will emerge then.
Stem cells also have an attractive feature: because they generate telomerase, they can in principle renew eternally and produce a potentially limitless number of cells. The BiotechnologyInma Geron already has a patent on telomerase, the enzyme that prevents the aging of cells and could be used for life deflection. It is also as a donor behind the research of Thomson’s team and of Gearhart – and is thus well in the race, especially as they have a patent on the transfer of telomerase gene in human stem cells. For the stem cell patent of the researchers you have a worldwide license.In Germany, this type of research is banned with human embryonic cells, in the USA there is no public money. So this is by no means an obstacle, because Geron will continue to promote research on these miracles cells in a press release to continue to develop stem cells, determining the factors in cell differentiation, techniques for genetic manipulation of cells and models Examination of the possible transplant products to develop. But you will proceed with reasonable guidelines. Geron is committed to Ronald Eastman, CEO of Geron, "to realize the huge potential of this technology in a responsible way."
Derivation of stem cells – Geron
The stem cells are merely as "pluripotent" designated. To prove that human stem cells "totipotent" be, one had to develop an organism from the cell. That’s already done with animal cells, but from ethical reasons you did not do that with human. It also refers to that the human stem cells used in the experiments come from voluntary donations from IVF blastocytes of previously informed patients, these still obtained undifferentiated cells in the laboratory and "No cellular equivalent of an embryo" represent. Geron ares that stem cells do not use cloning people, they do not plant in a bullter or produce human animal chimars from it. We will see.
Attuber BBC has already become Harry Griffin from the Roslin Institute, that the technique of cell core transfer developed in her institute could also apply the clone Dolly, even in stem cells. "Our specific contribution (for a possible cooperation) could make it possible to gain these cells from the patient themselves and thus avoid immunological problems." So it was not only possible if the technique is mature to use cells of a newborn and cloning, freezing them and transplant later, but they could also use cells of an adult.
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