Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New formation of nerve cells and blood vessels earlier than expected after stroke

21.04.2006


As early as one or two days after a stroke, that is, far earlier than was previously thought, the formation of new nerve cells and blood vessels gets underway in the affected area. This is indicated by findings in a dissertation by Wei Juang at Umeå University in Sweden.



Stroke is most often caused by a blockage of one of the heart’s blood vessels, which results in disrupted blood flow, so-called ischemic stroke. Brain damage occurs directly and spreads for the first few critical days. After that, the brain damage starts to heal, a process that can take many months and even years. It is not known what lies behind the capacity of the brain to recover.

In her dissertation Wei Jiang found that new formation of blood vessels, angiogenesis, starts in the brain as early as 24-48 hours after a stroke, that is, far earlier that was previously thought. Moreover, she found new formation of nerve cells in the damaged area. The newly generated nerve cells could be seen after seven days and were still in evidence up to 60 days after the damaged occurred. This new formation of blood vessels and nerve cells can be critical to the healing of the brain and offers the potential for entirely new treatments.


In experiments, the DNA in cells of animal models was injected with marked antibodies in a damaged area. In this way new nerve cell and blood vessel growth was demonstrated after a stroke. What’s more, the generation of proteins and energy molecules (ATP) in the brain was measured, as was blood flow, with the aid of isotope technology and laser Doppler.

Ischemic stroke is the third most common cause of death and the most common cause of functional impairment in adults. Every year 30,000 Swedes are affected by stroke. The severity of an acute ischemic stroke depends primarily on how long and to what extent the flow of blood to the brain is disrupted.

Title of dissertation: Regeneration in the adult brain after focal cerebral ischemia exploration of neurogenesis and angiogenesis

Bertil Born | alfa
Further information:
http://www.umu.se
http://www.diva-portal.org/umu/theses/abstract.xsql?dbid=739&lang=sv

More articles from Health and Medicine:

nachricht Oxygen can wake up dormant bacteria for antibiotic attacks
08.12.2016 | Penn State

nachricht NTU scientists build new ultrasound device using 3-D printing technology
07.12.2016 | Nanyang Technological University

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Will Earth still exist 5 billion years from now?

08.12.2016 | Physics and Astronomy

Oxygen can wake up dormant bacteria for antibiotic attacks

08.12.2016 | Health and Medicine

Newly discovered bacteria-binding protein in the intestine

08.12.2016 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>