Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Platelets block HIV

23.07.2013
Scientists of the DPZ have shown that platelet activation inhibits the host cell entry of HIV

Infection biologists of the German Primate Center (DPZ) under the direction of Stefan Pöhlmann have found evidence that platelets (thrombocytes) might constitute an innate defense against infection with the human immunodeficiency virus (HIV). HI-viruses are the cause of the immune deficiency disease AIDS.

In cooperation with colleagues from the Hannover Medical School and the Institute of Molecular Virology, Ulm University Medical Center, the scientists of the DPZ have shown in a recent study that platelet activation suppresses HIV type 1 (HIV-1) infection of cell cultures and might thus reduce viral spread in patients. The paper was published in the scientific journal Retrovirology.

Platelets, the smallest particles of the blood, are activated through contact with the vascular connective tissue, which leads to a change of their shape and the release of biological active substances from inside the platelets. One of these substances is the messenger protein CXCL4, which blocks the host cell entry of HIV-1. This finding was reported in 2012 by Auerbach and colleagues, National Institute of Allergy and Infectious Diseases, Bethesda, USA, for purified CXCL4. The efficiency of HIV-1 inhibition by platelets in patients is currently unclear and might depend on platelet numbers and activation status.

There are two types of the HI-virus: HIV-1 and HIV-2. Additionally, there is a closely related virus, which occurs in monkeys and apes – the simian immunodeficiency virus (SIV). The current study has demonstrated that HIV-1 is inhibited upon platelet activation while HIV-2 and SIV are not. HIV-1 is the most frequent and also the most aggressive type of HI-virus.

“Our research indicates that platelets might constitute an innate barrier against HIV-1 infection, a function that was largely unknown“, says Stefan Pöhlmann, head of the Infection Biology Unit at the German Primate Center and senior author of the new study. “Further research needs to uncover how efficiently CXCL4 released by platelets inhibits HIV-1 spread in patients. Another goal should be to identify substances with a CXCL4-like antiviral activity and to develop them as novel therapies against HIV-1 infection.”

Original publication:
Theodros Solomon Tsegaye, Kerstin Gnirß, Niels Rahe-Meyer, Miriam Kiene, Annika Krämer-Kühl, Georg Behrens, Jan Münch & Stefan Pöhlmann (2013): Platelet activation suppresses HIV-1 infection of T cells. Retrovirology 10: 48.

Contact:

Prof. Dr. Stefan Pöhlmann
Tel: +49 551 3851-150
E-Mail: spoehlmann@dpz.eu
Astrid Slizewski (Stabsstelle Kommunikation)
Tel: +49 551 3851-359
E-Mail: aslizewski@dpz.eu
The German Primate Center (DPZ) in Göttingen, Germany, conducts basic research on and with primates in the areas of infectious diseases, neurosciences and organismic biology. In addition, it operates four field stations abroad and is a competence and reference center for primate research. The DPZ is one of the 86 research and infrastructure institutions of the Leibnitz Association in Germany.

Astrid Slizewski | idw
Further information:
http://www.dpz.eu

More articles from Health and Medicine:

nachricht A better way to measure the stiffness of cancer cells
01.03.2017 | Duke University

nachricht Humans have three times more brown body fat
01.03.2017 | Technische Universität München

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: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

Im Focus: Safe glide at total engine failure with ELA-inside

On January 15, 2009, Chesley B. Sullenberger was celebrated world-wide: after the two engines had failed due to bird strike, he and his flight crew succeeded after a glide flight with an Airbus A320 in ditching on the Hudson River. All 155 people on board were saved.

On January 15, 2009, Chesley B. Sullenberger was celebrated world-wide: after the two engines had failed due to bird strike, he and his flight crew succeeded...

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

A better way to measure the stiffness of cancer cells

01.03.2017 | Health and Medicine

Exploring the mysteries of supercooled water

01.03.2017 | Physics and Astronomy

Research team of the HAW Hamburg reanimated ancestral microbe from the depth of the earth

01.03.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>