Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Researchers gain new insights into how tumor cells are fed

08.08.2011
Shows promise for development of anti-tumor drugs

Researchers have gained a new understanding of the way in which growing tumors are fed and how this growth can be slowed via angiogenesis inhibitors that eliminate the blood supply to tumors. This represents a step forward towards developing new anti-cancer drug therapies. The results of this study have been published today in the September issue of The American Journal of Pathology.

"The central role of capillary sprouting in tumor vascularization makes it an attractive target for anticancer therapy. Our observations suggest, however, that targeting just this mode of blood vessel formation may not be sufficient to result in a significant antitumor effect," commented lead investigators Sándor Paku, PhD, Semmelweis University, Budapest, and Balazs Dome, MD, PhD, Medical University of Vienna.

Investigators from the Semmelweis University, the National Institute of Oncology, and the National Koranyi Institute of Pulmonology, Budapest, Hungary, and the Medical University of Vienna, Vienna, Austria, used electron and confocal microscopy to examine tumor tissue in mice in which malignant tumor cells had been introduced. They proposed a novel mechanism for the development of tissue pillars (the most characteristic feature of intussusceptive angiogenesis, in which a vessel folds into itself to form two vessels). Moreover, they demonstrated a significant increase in pillar formation after treatment with the angiogenesis inhibitor vatalanib. Their observations support the notion that inhibition of just a single tumor vascularization mechanism can trigger alternative ones.

Prior to this study, the mechanism of pillar formation had not been fully understood. Investigation revealed a progression of events that generates a connection between the processes of endothelial bridging and intussusceptive angiogenesis resulting in rapid pillar formation from pre-existing building blocks. To describe this mechanism of pillar formation the group coined the term "inverse sprouting."

"It is well established now that tumors can obtain sufficient blood supply from alternative vascularization mechanisms (such as intussusceptive angiogenesis) to grow without capillary sprouting (known as the key mode of new vessel formation in cancer). Therefore, antiangiogenic therapies should be tailored depending on the angiogenic phenotype in each single tumor, and the targeting of non-sprouting angiogenic mechanisms in cancer seems to be a rational strategy. Our study provides new understanding of cancer-induced intussusceptive angiogenesis and may serve as a basis for the development of novel drugs targeting this type of blood vessel formation."

The article is "A New Mechanism for Pillar Formation during Tumor-Induced Intussusceptive Angiogenesis," by Sándor Paku, Katalin Dezsö, Edina Bugyik, József Tóvári, József Tímár, Péter Nagy, Viktoria Laszlo, Walter Klepetko, and Balázs Döme (doi: 10.1016/j.ajpath.2011.05.033). It will appear in The American Journal of Pathology, Volume 179, Issue 3 (September 2011) published by Elsevier.

David Sampson | EurekAlert!
Further information:
http://www.elsevier.com

More articles from Life Sciences:

nachricht Brought to light – chromobodies reveal changes in endogenous protein concentration in living cells
21.09.2018 | NMI Naturwissenschaftliches und Medizinisches Institut an der Universität Tübingen

nachricht A one-way street for salt
21.09.2018 | Julius-Maximilians-Universität Würzburg

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Scientists present new observations to understand the phase transition in quantum chromodynamics

The building blocks of matter in our universe were formed in the first 10 microseconds of its existence, according to the currently accepted scientific picture. After the Big Bang about 13.7 billion years ago, matter consisted mainly of quarks and gluons, two types of elementary particles whose interactions are governed by quantum chromodynamics (QCD), the theory of strong interaction. In the early universe, these particles moved (nearly) freely in a quark-gluon plasma.

This is a joint press release of University Muenster and Heidelberg as well as the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt.

Then, in a phase transition, they combined and formed hadrons, among them the building blocks of atomic nuclei, protons and neutrons. In the current issue of...

Im Focus: Patented nanostructure for solar cells: Rough optics, smooth surface

Thin-film solar cells made of crystalline silicon are inexpensive and achieve efficiencies of a good 14 percent. However, they could do even better if their shiny surfaces reflected less light. A team led by Prof. Christiane Becker from the Helmholtz-Zentrum Berlin (HZB) has now patented a sophisticated new solution to this problem.

"It is not enough simply to bring more light into the cell," says Christiane Becker. Such surface structures can even ultimately reduce the efficiency by...

Im Focus: New soft coral species discovered in Panama

A study in the journal Bulletin of Marine Science describes a new, blood-red species of octocoral found in Panama. The species in the genus Thesea was discovered in the threatened low-light reef environment on Hannibal Bank, 60 kilometers off mainland Pacific Panama, by researchers at the Smithsonian Tropical Research Institute in Panama (STRI) and the Centro de Investigación en Ciencias del Mar y Limnología (CIMAR) at the University of Costa Rica.

Scientists established the new species, Thesea dalioi, by comparing its physical traits, such as branch thickness and the bright red colony color, with the...

Im Focus: New devices based on rust could reduce excess heat in computers

Physicists explore long-distance information transmission in antiferromagnetic iron oxide

Scientists have succeeded in observing the first long-distance transfer of information in a magnetic group of materials known as antiferromagnets.

Im Focus: Finding Nemo's genes

An international team of researchers has mapped Nemo's genome

An international team of researchers has mapped Nemo's genome, providing the research community with an invaluable resource to decode the response of fish to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

"Boston calling": TU Berlin and the Weizenbaum Institute organize a conference in USA

21.09.2018 | Event News

One of the world’s most prominent strategic forums for global health held in Berlin in October 2018

03.09.2018 | Event News

4th Intelligent Materials - European Symposium on Intelligent Materials

27.08.2018 | Event News

 
Latest News

Astrophysicists measure precise rotation pattern of sun-like stars for the first time

21.09.2018 | Physics and Astronomy

Brought to light – chromobodies reveal changes in endogenous protein concentration in living cells

21.09.2018 | Life Sciences

"Boston calling": TU Berlin and the Weizenbaum Institute organize a conference in USA

21.09.2018 | Event News

VideoLinks
Science & Research
Overview of more VideoLinks >>>