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Rutgers Scientists Discover Protein In
Brain Affects Learning And Memory

NEW BRUNSWICK/PISCATAWAY, N.J. – Rutgers researchers have discovered what could be the newest target for drugs in the treatment of memory and learning disabilities as well as diseases such as Alzheimer's and fetal alcohol syndrome: a protein known as cypin.

Cypin is found throughout the body, but in the brain it regulates nerve cell or neuron branching. Branching or dendrite growth is an important process in normal brain function and is thought to increase when a person learns. A reduction in branching is associated with certain neurological diseases.

"The identification of cypin and understanding how it works in the brain is particularly exciting since it opens up new avenues for the treatment of serious neurological disorders," said principal investigator Bonnie Firestein, assistant professor of cell biology and neuroscience at Rutgers, The State University of New Jersey. "This paves the way to designing new drugs that could target this protein molecule."

Proteins or the genes that code for them have become the targets of choice for developing precisely focused, effective new drug therapies – one of the outcomes of the many revelations provided by the Human Genome Project.

Firestein first identified and isolated cypin in 1999 during her postdoctoral research. She is currently focusing on how it works in the hippocampus, a structure in the brain associated with the regulation of emotions and memory.

"We knew that cypin existed elsewhere in the body where it performs other functions, but no one knew why it was present in the brain," Firestein. Her new research determined that cypin in the brain works as an enzyme involved in shaping neurons.

"One end of a neuron looks like a tree and, in the hippocampus, cypin controls the growth of its branches," she explained. "An increase in the number of branches provides additional sites where a neuron can receive information that it can pass along, enhancing communication."

Maxine Chen, a graduate student in Firestein's laboratory, helped substantiate the connection between cypin and dendrite growth. When she looked closely at neurons in the lab, she found cypin only in certain neurons – "neurons that tended to be more fuzzy," as she described those with increased dendrites. Stimulating neurons in a dish also produced an increase in the protein overall. This has been shown to increase dendrite growth.

Fellow graduate student Barbara Akum further verified the connection between the protein and branching. She used a new molecular technique developed by Samuel Gunderson, a Rutgers assistant professor of molecular biology and biochemistry. With this new tool, Akum reduced the expression of cypin and observed a consequent decrease in branching.

"We also found something else that is really exciting," said Firestein, referring to the molecular mechanics by which cypin affects dendrite growth. Cypin appears to act as a glue that cements other molecules together into long chain structures that extend through the branches of a dendrite as a skeleton.

"Cypin works on tubulin, a protein that is a structural building block of the dendrite skeleton," explained Firestein. "If you just take our purified protein and mix it with tubulin in a test tube, the cypin on its own will actually cause these skeletal structures to grow."

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Alice had a faint smile for this. "Well, I admit I was rather mystified by that hat and wig. But when you come to rationalise the thing, what is there in it?" The Doctor was taking long strides and flourishing his leather gloves in the air. "How could such a thing be? How can anybody in his right senses entertain the notion that Dunn Brothers are still in existence two thousand years hence? And the Clarkson business. It's absurd on the face of it." Formerly an apprentice entered a shop to learn hand skill, and to acquaint himself with a number of mysterious processes; to learn a series of arbitrary rules which might serve to place him at a disadvantage even with those whose capacity was inferior and who had less education; but now the whole is changed. An engineer apprentice enters the shop with a confidence that he may learn whatever the facilities afford if he will put forth the required efforts; there are no mysteries to be solved; nearly all problems are reached and explained by science, leaving a greater share of the shop-time of a learner to be devoted to studying what is special. are very damp. The influence of Aristotle has, indeed, continued to make itself felt not only through the teaching of his modern imitators, but more directly as a living tradition in literature, or through the renewed study of his writings at first hand. Even in the pure sciences, it survived until a comparatively recent period, and, so far as the French intellect goes, it is not yet entirely extinct. From Abélard on, Paris was the headquarters of that soberer scholasticism which took its cue from the Peripatetic logic; and the resulting direction of thought, deeply impressed as it became on the French character and the French language, was interrupted rather than permanently altered by the Cartesian revolution, and, with the fall of Cartesianism, gradually recovered its old predominance. The Aristotelian philosophy is remarkable above all others for clear definitions, full descriptions, comprehensive classifications, lucid reasoning, encyclopaedic science, and disinterested love of knowledge; along with a certain incapacity for ethical speculation,576 strong conservative leanings, and a general tendency towards the rigid demarcation rather than the fruitful commingling of ideas. And it will probably be admitted429 that these are also traits characteristic of French thinking as opposed to English or German thinking. For instance, widely different as is the Mécanique Céleste from the astronomy of Aristotle’s treatise On the Heavens, both agree in being attempts to prove the eternal stability of the celestial system.577 The destructive deluges by which Aristotle supposes civilisation to be periodically interrupted, reappear on a larger scale in the theory of catastrophes still held by French geologists. Another Aristotelian dogma, the fixity of organic species, though vigorously assailed by eminent French naturalists, has, on the whole, triumphed over the opposite doctrine of transformism in France, and now impedes the acceptance of Darwin’s teaching even in circles where theological prepossessions are extinct. The accepted classifications in botany and zoology are the work of Frenchmen following in the footsteps of Aristotle, whose genius for methodical arrangement was signally exemplified in at least one of these departments; the division of animals into vertebrate and invertebrate being originally due to him. Bichat’s distinction between the animal and the vegetable functions recalls Aristotle’s distinction between the sensitive and nutritive souls; while his method of studying the tissues before the organs is prefigured in the treatise on the Parts of Animals. For a long time, the ruling of Aristotle’s Poetics was undisputed in French criticism; and if anything could disentitle Montesquieu’s Esprit des Lois to the proud motto, Prolem sine matre creatam, it would be its close relationship to the Politics of the same universal master. 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He was immediately compelled to solicit for peace from Austria through the mediation of George of England and Prince William of Hesse. But Maria Theresa, now helped out of all her difficulties by English money and English soldiers, was not inclined to listen to any moderate terms, even when proposed by her benefactor, the King[86] of England. The Emperor was down, and she proposed nothing less than that he should permanently cede Bavaria to her, or give up the Imperial crown to her husband. Such terms were not to be listened to; but the fallen Emperor finally did conclude a treaty of neutrality with the Queen of Hungary, by which he consented that Bavaria should remain in her hands till the conclusion of a peace. This peace the King of England and William of Hesse did their best to accomplish; and Carteret, who was agent for King George, had consented that on this peace England should grant a subsidy of three hundred thousand crowns to the Emperor. No sooner, however, did the English Ministers receive the preliminaries of this contract, than they very properly struck out this subsidy, and the whole treaty fell to the ground. Amongst the earliest of the prose writers may be mentioned the theological authors. Cumberland was the author of a Latin treatise, "De Legibus Natur?," in which he successfully combated the infidelity of Hobbes. Bull, who, as well as Cumberland, became a bishop, distinguished himself before the Revolution by his "Harmonia Apostolica," an anti-Calvinistic work, and by his "Defensio Fidei Nicen?." In 1694 he published his "Judicium Ecclesi? Catholic?." John Norris, of the school of Cudworth and Henry More, and nearly the last of that school called the English Platonists, published, besides many other works, his "Essay on the Ideal World" in 1701 and 1702. He also wrote some religious poetry of no particular mark. "Better now?" asked Pete. 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