Orang Yahudi yang pada hal lagi dikepung orang Arab !yang memang rata-rta dungu
kayak anjing itu) masih ada waktu dan kecerdasan untuk melakukan, penelitian
yang begini pelik...
Jelas agama Islam yagn dianut kebanyakan orang Arab itu adalah salah satu sebab
utama kenap aorang Arab itu nggk sanggup make otak lagi......
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Web address:
http://www.sciencedaily.com/releases/2008/12/
081221220328.htm
Mechanism That Triggers Differentiation Of Embryo Cells Discovered
Prof. Yehudit Bergman. Professors Yehudit Bergman and Howard Cedar of the
Hebrew University-Hadassah Medical School have deciphered the mechanism whereby
embryonic cells stop being flexible and turn into more mature cells that can
differentiate into specific tissues. (Credit: Image courtesy of Hebrew
University of Jerusalem)
ScienceDaily (Dec. 22, 2008) — The mechanism whereby embryonic cells stop being
flexible and turn into more mature cells that can develop into specific tissues
has been discovered by scientists at the Hebrew University of Jerusalem. The
discovery has significant consequences towards furthering research that will
eventually make possible medical cell replacement therapy based on the use of
embryonic cells.
At a very early stage of human development, all cells of the embryo are
identical, but unlike adult cells are very flexible and carry within them the
potential to become any tissue type, whether it be muscle, skin, liver or brain.
This cell differentiation process begins at about the time that the embryo
settles into the uterus. In terms of the inner workings of the cell, this
involves two main control mechanisms. On the one hand, the genes that keep the
embryo in their fully potent state are turned off, and at the same time,
tissue-specific genes are turned on. By activating a certain set of genes, the
embryo can make muscle cells. By turning on a different set, these same
immature cells can become liver. Other gene sets are responsible for additional
tissues.
In a recent paper, published in the journal, Nature Structural and Molecular
Biology, Professors Yehudit Bergman and Howard Cedar of the Hebrew
University-Hadassah Medical School have deciphered the mechanism whereby
embryonic cells stop being flexible and turn into more mature cells that can
differentiate into specific tissues. Bergman is the Morley Goldblatt Professor
of Cancer Research and Experimental Medicine and Cedar is the Harry and Helen
L. Brenner Professor of Molecular Biology at the Medical School.
They found in their experiments, using embryos from laboratory mice and cells
that grow in culture, that this entire process is actually controlled by a
single gene, called G9a, which itself is capable of directing a whole program
of changes that involves turning off a large set of genes so that they remain
locked for the entire lifetime of the organism, thereby unable to activate any
further cell flexibility.
Their studies shed light not only on this central process, but also can have
consequences for medical treatment. One of the biggest challenges today is to
generate new tissues for replacing damaged cells in a variety of different
diseases, such as Parkinson’s disease or diabetes. Many efforts have been aimed
at “reprogramming” readily-available adult cells, but scientists have
discovered that it is almost impossible to do this, mainly because normal
tissues are locked in their fixed program and have lost their ability to
convert back to fully potent, flexible, embryonic cells.
Now, with the new information discovered by Bergman and Cedar, the molecular
program that is responsible for turning off cell flexibility has been
identified, and this may clear the way towards developing new approaches to
program cells in a controlled and specific manner.
Adapted from materials provided by Hebrew University of Jerusalem, via
AlphaGalileo.
Email or share this story:
Need to cite this story in your essay, paper, or report? Use one of the
following formats:
APA
MLA
Hebrew University of Jerusalem (2008, December 22). Mechanism That Triggers
Differentiation Of Embryo Cells Discovered. ScienceDaily. Retrieved December
23, 2008, from http://www.sciencedaily.com /releases/2008/12/081221220328.htm
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Jusfiq Hadjar gelar Sutan Maradjo Lelo
Allah yang disembah orang Islam tipikal dan yang digambarkan oleh al-Mushaf itu
dungu, buas, kejam, keji, ganas, zalim lagi biadab hanyalah Allah fiktif.
[Non-text portions of this message have been removed]
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