Impression a flower that opens when front the sunlight. In work that mimics that sensitivity to unearth, an MIT engineer and
German colleagues entertain created the first plastics that can be deformed and temporarily fixed in a second, new shape by
illumination with upon having firm wavelengths. These programmed materials will however switch bankrupt to their source develop
when exposed to light of precise different wavelengths.

The work, to be reported in the April 14 issue of Complexion, could have potential applications in a strain of fields, including
minimally invasive surgery. Devise, for example, a “string” of plastic that a doctor threads into the density through a tiny
incision. When activated by light via a fiber-optic go into, that slender string might coppers into a corkscrew-shaped stent after
keeping blood vessels open.

What about staples that open on stewardship, or paper clips that relax as without delay as you don’t need them anymore? Again, light could
do the career.

“This is really a new family of materials that can hard cash from one shape to another by having settle shined on them,” said
Found Professor Robert Langer of MIT.

Langer co-authored the paper with Andreas Lendlein, Hongyan Jiang, and Oliver Jünger. Lendlein, a former MIT visiting
scientist, is institute director at the GKSS inquiry center in Teltow, Germany. With Jiang and Jünger, he is also affiliated
with RWTH Aachen, Germany.

FORMULATE MEMORY

Plastics with “shape-memory” that can change adjust a take form in response to a temperature increase are well known. In 2001 Langer and
Lendlein were the first to report biodegradable versions of these materials in the Proceedings of the National Academy of
Sciences.

A year later the researchers introduced thermoplastic, biodegradable shape-honour polymers and demonstrated a splendid
claim giving a flavor of the modernization potential in the medical cope with: a smart suture that ties itself into the
perfect knot. That work was described in the journal Area; mnemoScience GmbH of Aachen, Germany was developed to
commercialize the discovery.

“Now in lieu of of warm up , we can induce the cut-memory effect in polymers with light,” said Lendlein.

Style to the work: “molecular switches,” or photosensitive groups that are grafted onto a permanent polymer network. The
resulting photosensitive polymer sheet is then stretched with an perceptible stress, and illuminated with ultraviolet light of a
certain wavelength. This prompts the molecular switches to crosslink, or make fast one to another.

The follow-up? When the light is switched situated and the external stress released, the crosslinks remain, maintaining an elongated
framework. Direction to assault of another wavelength cleaves the changed bonds, allowing the material to spring back to its
original shape.

The conspire notes that in addition to elongated films, a assortment of other pro tem shapes can be produced. For example, a
spiral can be created by exposing only one side of the stretched nibble to light. The arise is the composition of two layers.
So “while the deformation is immeasurably-firm in the direction of [the irradiated] layer, the other keeps its elasticity. As a consequence, a given
contracts much more than the other when the visible stress is released, forming an arch or corkscrew spiral fit,” the
authors pen.

The rig has also shown that the temporary shapes are “very stable in the direction of long times even when heated to 50 degrees C.”

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“In our Constitution paper, the focal principle of photo-induced shape-memory polymers is explained. We are currently developing
medical and industrial applications using their photosensitivity,” Lendlein said.

The work was funded in imply by a BioFuture Awarding from the Bundesministerium für Bildung und Forschung, Germany, and a
belonging from the Alexander von Humboldt Foundation.

Massachusetts Guild of Technology

http://web.mit.edu/newsoffice/www

The Intercontinental AIDS
Vaccine Aggressiveness (IAVI) has entered into a hire out in favour of duration with Immature York
City Economic Development Corporation (NYCEDC) and partnered with the Regal
University of New York (SUNY) Downstate Medical Center to become the from the word go
tenant at BioBAT, a trendy 486,000 square foot bioscience center to be housed
at the Brooklyn Army Terminal in the Sunset Car park section of Brooklyn.
BioBAT is a collaboration between NYCEDC and SUNY Downstate through the
SUNY Research Foundation. IAVI plans to develop a world-refinement laboratory
focused exclusively on accelerating the development of AIDS vaccines.

Under the terms of the 15-year lease with NYCEDC, the agency that
manages BAT on behalf of the Metropolis of New York, IAVI will use up 36,000
square feet of space and move its AIDS Vaccine Development Laboratory into
the new facility in the first quarter of 2008 from a evanescent spot at
the SUNY Downstate campus. The City and the Aver are providing $54.5
million in place of the the world of BioBAT, and the Bishopric bequeath provide $12.5 million
of its portion conducive to the construction of IAVI’s while.

“Ending the AIDS spread is one of the greatest public health
challenges we face today, and I can’t think of a better place to think up the
next generation of AIDS vaccine candidates than in Uncharted York City, the
extensive great of the world and IAVI’s headquarters for the past ten
years,” said Seth Berkley, President and CEO of IAVI. “I am expectant that
some of the most cheering vaccine concepts in the next five years will
emerge from work done at IAVI’s AIDS Vaccine Development Laboratory and its
associated scrutiny partners.”

“IAVI’s judgement to become a tenant at BioBAT reinforces our commitment
to establishing a bioscience center at the Brooklyn Army Coupler,” said
NYCEDC President Robert C. Lieber. “BioBAT will provide the bioscience
companies at SUNY Downstate space to spring up when they have outgrown their
incubator space. I commend IAVI for its commitment to New York City and
BioBAT.”

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“We yearning that IAVI’s decision to establish its AIDS Vaccine Development
Laboratory in Brooklyn liking fire additional bioscience companies to
discharge trial,” said John C. LaRosa, M.D., President of SUNY Downstate.
“Downstate and IAVI deceive worked together allowing for regarding the past two years, and
today’s formal advert is an acknowledgement of our moneymaking
partnership.”

IAVI created its AIDS Vaccine Development Laboratory to bridge a
critical distinction in AIDS vaccine up on and development. Collaborating with a
network of accredited laboratories and research partners across the globe,
the Lab aims to populate the vaccine pipeline with new concepts, which
elicit multiple, targeted unsusceptible responses that exhibit a measurable
improvement over the candidates currently undergoing clinical testing, and
therefore hold the potential to produce greater barrier from HIV
infection.

IAVI’s AIDS Vaccine Development Laboratory applies an industrial
approach — in terms of go up, scientific expertise, high-throughput
capacity and financial resources — to positive vaccine concepts. The Lab
is designed to accelerate the development of novel technologies that
academia does not be undergoing the resources to without delay develop and that industry
want not support because these untrodden approaches do not yet demonstrate a high
sufficient likeliness of success. By investing in innovations and developing
products that have a higher scientific risk, IAVI is in the unique placing
to significantly change the landscape of AIDS vaccine research and
progress.

Twenty-six years after scientists first identified the AIDS virus, the
global pandemic continues to take its toll. Barely 40 million people across
the globe are now living with HIV, and the epidemic is expanding in latest
pockets in Eastern Europe and Asia. A preventive AIDS vaccine remains the
greatest upon of reversing HIV’s relentless spread.

In addition to the City of New York, IAVI has received funding from the
New York Community Charge for a paramount two-year grant that provided early and
unworkable support of the Lab; and the Pendleton Charitable Trust. IAVI
acknowledges the Bill & Melinda Gates Foundation in return a major grant in
subsidize of new vector research at the Lab.

Nearly IAVI

The International AIDS Vaccine Initiative (IAVI) is a global not-through despite-
profit system whose pursuit is to ensure the development of safe,
effective, available, serum HIV vaccines for the treatment of use throughout the
circle. Founded in 1996 and operational in 24 countries, IAVI and its
network of collaborators research and develop vaccine candidates. IAVI’s
financial and in-variety supporters include the Alfred P. Sloan Fundamental principle,
the Bill & Melinda Gates Grounds, the Foundation for the National
Institutes of Health, The John D. Evans Foundation, The Supplemental York Community
Trust, the James B. Pendleton Charitable Pin one’s faith, The Rockefeller Foundation,
The Starr Foundation, The William and Flora Hewlett Origination; the
Governments of Canada, Denmark, Ireland, The Netherlands, Norway, Sweden,
the United Kingdom, and the Concerted States, the Basque Autonomous Government
as well as the European Association; multilateral organizations such as The In seventh heaven
Bank; corporate donors including BD (Becton, Dickinson & Co.), Continental
Airlines, Google Inc., Henry Schein, Inc., Merck & Co., Inc. and Pfizer
Inc; leading AIDS charities such as Broadway Cares/Equity Fights AIDS and
Until There’s A Cure Foundation; other on the sly donors such as The Haas
Trusts; and many bounteous individuals from around the world. For more
data, certain http://www.iavi.org.

In the matter of EDC

New York City Economic Development Corporation is the City’s select
conveyance over the extent of promoting remunerative growth in each of the five boroughs.
NYCEDC’s charge is to stimulate growth through expansion and redevelopment
programs that hearten investment, mould prosperity and substantiate the
City’s competitive position. NYCEDC serves as an solicitor to the business
community by structure relationships with companies that assign them to take
usefulness of New York City’s many opportunities.

About SUNY Downstate

SUNY Downstate Medical Center is the only visionary medical center in
Brooklyn, comprising Colleges of Prescription, Nursing, and Allied Health, a
Nursery school of Graduate Studies, a public health gradually program, the 376-bed
University Hospital of Brooklyn, and an Advanced Biotechnology Incubator,
part of a growing Biotechnology Park. Downstate conducted the first
federally funded con of HIV’s transmission from old lady to fetus. Its
large HIV/AIDS program includes the HIV Center after Women and Children. To
learn more about SUNY Downstate, call in http://www.downstate.edu.

International AIDS Vaccine Drive
http://www.iavi.org

The US Food and Drug Administration (FDA) announced yesterday, Wednesday 14th May, that Bayer Pharmaceuticals Corporation is withdrawing
remaining stocks of its antifibrinolytic hallucinogenic Trasylol (aprotinin) following the confirmation of the preliminary findings of a muse about that showed the drug
increased jeopardize of death compared to two other drugs adapted to to control bleeding during heart surgery.

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Back in October and November matrix year, the FDA announced that Bayer had agreed to an FDA request to suspend marketing of Trasylol, after the
introductory findings of the Canadian study, known as BART (Blood Economy using Antifibrinolytics: A Randomized Trial in High-Endanger Cardiac
Surgery Patients) suggested it increased risk of termination. The group said it would re-assess its options at a go the final results were
available.

These results are now available and were published yesterday, 14th May, in the New England Fortnightly of Medication. They confirm the antiquated
findings, and conclude that although aprotinin (brand rating Trasylol) reduces bleeding modestly, its high mortality rate compared to two other
antifibrinolytic drugs “precludes its smoke in high-risk cardiac surgery”. The two other antifibrinolytic drugs were the lysine analogues tranexamic acid
and aminocaproic acid.

Drs Wayne A Ray and C. Michael Stein from Vanderbilt University in Tennessee wrote in an accompanying think-piece that:

“Thus, in all good chance, this is the end of the aprotinin story.”

Bayer has informed the FDA that it compel instantly sack remaining stocks of Trasylol from the US market. Most of the stock is in warehouses, doctors’
surgeries, and hospitals. The mechanism said it will exploit with the drug company to ensure a “smooth and complete process”.

The drug remains available for investigational urgency, call of the control of a narrow usability agreement and a treatment pact that has to be approved by
the FDA. Bayer has agreed to provide the drug under these conditions.

This means Trasylol will be available with a view certain patients who have no other treatment options for reducing their high peril of blood trouncing debits and transfusion
during coronary artery bypass graft surgery. The FDA said doctors should make unfailing the benefits of Trasylol “clearly outweigh the risks” if they use it
with their patients.

Trasylol belongs to a class of drugs known as antifibrinolytics because they moderate the breakdown of blood clots and therefore reduce excessive
bleeding. It was approved by the FDA in 1993 to reduce blood loss and the requisite for transfusion in patients having a cardiopulmonary route during
coronary artery bypass graft surgery.

At the together of the announcement yesterday, the FDA had not yet received the chock-a-block results of the BART study, but said it supported the company’s
decision to pull the medicine from the US market. When it receives the full results, the activity will also review the details of the current intimate treatment
protocol for the drug because that will control the small use suited for certain patients in the to be to come.

“A Commensurability of Aprotinin and Lysine Analogues in Soprano-Risk Cardiac Surgery.”
Fergusson, Dean A., Hebert, Paul C., Mazer, C. David, Fremes, Stephen, MacAdams, Charles, Murkin, John M., Teoh, Kevin, Duke, Peter C.,
Arellano, Ramiro, Blajchman, Morris A., Bussieres, Jean S., Cote, Dany, Karski, Jacek, Martineau, Raymond, Robblee, James A., Rodger, Marc,
Wells, George, Clinch, Jennifer, Pretorius, Roanda, the BART Investigators.
N Engl J Med, Published online 14th May 2008.
DOI: 10.1056/NEJMoa0802395

Click here for the full Article.

Click here for FDA.

Sources: FDA.

Written by: Catharine Paddock, PhD

Copyright: Medical News Today

Not to be reproduced without enfranchisement of Medical Intelligence Today

To cure develop an telling HIV vaccine, researchers are trying to outstrip catch on to how the immune systems of a tight-fisted minority of HIV-infected people known as big-term non-progressors (LTNPs) contain the virus naturally.

CD8+ T cells, which kill cells infected with HIV, enable LTNPs to control HIV, but it has been unclear how CD8+ T cells mediate that control so effectively. A new report shows that the ability to stockpile two molecular weapons makes the HIV-specific CD8+ T cells of LTNPs superior cellular killers.

Lead author Stephen Migueles, M.D., senior author Mark Connors, M.D., and colleagues at the National Institute of Allergy and Infectious Diseases (NIAID), part of the National Institutes of Health, used cutting-edge technology to examine individual CD8+ T cells for their killing prowess. The study included new techniques to measure how many HIV-infected cells each CD8+ T cell destroys, and how rapidly. In laboratory experiments, the scientists found that CD8+ T cells taken from LTNPs efficiently killed HIV-infected cells in less than 1 hour. In contrast, the CD8+ T cells of progressors, or individuals who do not contain the virus without antiretroviral therapy, killed HIV-infected cells inefficiently, even when the CD8+ T cells were present in high numbers or came from progressors being successfully treated with antiretroviral therapy.

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When CD8+ T cells kill HIV-infected cells, a protein, perforin, made by the CD8+ T cells punches holes in the infected cells. Then a second protein, granzyme B, penetrates those holes and causes the cells to die. Previously, the researchers found that HIV-specific CD8+ T cells of progressors, unlike those of LTNPs, make little perforin when they encounter an HIV-infected cell. It remained unclear, however, whether this deficiency explained why HIV-specific CD8+ T cells of progressors are poor killers. The current study demonstrates a direct relationship between the quantity of both perforin and granzyme B that CD8+ T cells accumulate over time and the ability of CD8+ T cells to eliminate HIV-infected cells. This discovery significantly advances the understanding of the cellular mechanisms unique to LTNPs that explain why their immune systems, unlike those of the majority of HIV-infected people, can control HIV without antiretroviral therapy.

According to the NIAID scientists, their results also suggest that an HIV vaccine might control virus replication if it could stimulate HIV-specific CD8+ T cells to robustly stock and rapidly deliver perforin and granzyme B to HIV-infected cells.

http://www.niaid.nih.gov/

As diagnostic imaging, such as PET scans or MRIs, continues to grow in lionization, insurers are looking to limit coverage of the costly scans, the Baltimore Sun reports. Diagnostic imaging accounts for about $100 billion annually, or give 5% of national health care spending. Medicare payments to physicians allowing for regarding imaging had “by go places the highest increase rate” of medical billing categories examined in a 2000 to 2005 study by the CMS Support of the Actuary.

A 2004 study published in the record Stroke establish that the cost of medical scans is offset by allowing physicians to make earlier diagnoses and getting a sedulous to start treatment more straight away. In addition, improved imaging technology “has vastly reduced the need object of high-priced exploratory or unneeded surgery,” according to the Sun. However, there also are instances “where unneeded scans are ordered, or where a less costly alternative would must sufficed,” the Sun reports. There also is concern that many doctors are overusing self-referrals to leg up revenue.

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Some insurers are paying discount rates for imaging services in an shot at to “rein in costs,” the Day-star reports. Medicare this year instituted limits on destined fees paid to doctors, which are expected to triturate the amount gush on imaging. Most radiology benefit managers are trying to charge costs through requiring pre-authorization of scans. According to a November 2006 con published in the Journal of the American College of Radiology, a requirement that doctors sustain pre-authorization as regards scans was found to shrivel up CT scans by a third and MRIs by 9% during the two years that the requisite was instituted. Regardless, receiving authorization can be a “tedious” and time-consuming process, the Sun reports (Salganik, Baltimore Sun, 5/13).


The JACR research is available online.

“Reprinted with permission from http://www.kaisernetwork.org. You can view the entire Kaiser Daily Health Design Report, search the archives, or sign up payment email delivery at http://www.kaisernetwork.org/dailyreports/healthpolicy. The Kaiser Daily Constitution Custom Record is published for kaisernetwork.org, a free putting into play of The Henry J. Kaiser Family Foundation . © 2005 Hortatory Board Group and Kaiser Family Foundation. All rights unsocial.