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|WASHINGTON http://www.cheapnflcardinalsjerseys.com/john-brown-jersey/ , Aug. 11 (Xinhua) -- U.S. researchers said Monday they have created a three-dimensional brain-like tissue that functions like and has structural features similar to tissue in the rat brain and that can survive in the lab for more than two months.
The brain-like tissue, described in the U.S. journal Proceedings of the National Academy of Sciences, may offer new options for studying brain function, disease and trauma, and treatment.
The key to generating the tissue was the creation of a novel composite structure that consists of two biomaterials with different physical properties: a spongy scaffold made out of silk protein and a softer http://www.cheapnflcardinalsjerseys.com/carson-palmer-jersey/ , collagen-based gel, researchers at the Tufts University said.
They first cut the spongy scaffold into a donut shape and populated it with rat neurons. Then, the researchers filled the middle of the donut with the collagen-based gel, which subsequently permeated the scaffold to encourage neuron growth.
In just a few days, the neurons clustered within the pores of the scaffold http://www.cheapnflcardinalsjerseys.com/patrick-peterson-jersey/ , forming long-lasting networks in the gels that resembled the complex circuitry of the brain in the rat.
"With the system we have, you can essentially track the tissue response to traumatic brain injury in real time," said Professor David Kaplan of the Tufts University who led the research efforts to develop the tissue.
"Most importantly, you can also start to track repair and what happens over longer periods of time."
The researchers were able to use the tissue model to examine multiple post-injury effects, including cellular damage http://www.cheapnflcardinalsjerseys.com/larry-fitzgerald-jersey/ , electrophysiological activity and neurochemical changes.
For example, when a weight was dropped on the model tissue to simulate a traumatic brain injury, the tissue released high levels of the chemical glutamate, a neurotransmitter known to be emitted by cells following brain damage, the researchers said.
The tissue also showed transient electrical hyperactivity consistent with post-trauma responses observed in vivo http://www.cheapnflcardinalsjerseys.com/chandler-jones-jersey/ , they said.
Kaplan emphasized the importance of the brain-like tissue's longevity for studying other brain disorders.
"The fact that we can maintain this tissue for months in the lab means we can start to look at neurological diseases in ways that you can't otherwise because you need long timeframes to study some of the key brain diseases," he said.
Previously, scientists have attempted to grow neurons in 3D gel environments, yet these gel-based tissue models don't live long and fail to yield robust, tissue-level function.
LISBON http://www.cheapnflcardinalsjerseys.com/david-johnson-jersey/ , March 21 (Xinhua) -- Following are the Portuguese soccer league results and standings on Saturday:
Estorial tied Penafiel 3-3
Rio Ave bt Benfica 2-1
Nacional tied FC Porto 1-1
Playing on Sunday
Boavista vs Belenenses
Moreirense vs Maritimo
Arouca vs Gil Vicente
Sporting vs V.Guimaraes
Standings (tabulated under matches played, won, drawn, lost, goals for http://www.cheapnflcardinalsjerseys.com/pat-tillman-jersey/ , goals against, points):
Benfica 26 21 2 3 63 13 65
FC Porto 26 19 5 2 58 11 62
Sportingl 25 15 8 2 46 22 53
SC Braga 26 14 5 7 39 17 47
V.Guimaraes 25 11 7 7 37 24 40
Rio Ave 26 9 9 8 33 32 36
Belenenses 25 9 9 7 25 26 36
P. Ferreira 25 10 6 9 31 35 36
Nacional 26 9 6 11 32 36 33
Moreirense 25 8 7 10 22 28 31
Maritimo 25 9 3 13 31 35 30
Estoril 26 6 10 10 30 45 28
Academica 26 4 14 8 19 30 26
Boavista 25 7 4 14 20 40 25
V.Setubal 25 6 5 14 18 40 23
Arouca 25 5 5 15 17 39 20
Gil Vicente 25 3 10 12 19 40 19
Penafiel 26 4 5 17 25 52 17
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