Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Social isolation worsens cancer

01.10.2009
Using mice as a model to study human breast cancer, researchers have demonstrated that a negative social environment (in this case, isolation) causes increased tumor growth. The work shows—for the first time—that social isolation is associated with altered gene expression in mouse mammary glands, and that these changes are accompanied by larger tumors.

"This interdisciplinary research illustrates that the social environment, and a social animal's response to that environment, can indeed alter the level of gene expression in a wide variety of tissues, not only the brain," said Suzanne D. Conzen, MD, associate professor of medicine at the University of Chicago and senior author of the study, to be published on September 30, 2009, in Cancer Prevention Research. "This is a novel finding and may begin to explain how the environment affects human susceptibility to other chronic diseases such as central obesity, type 2 diabetes, hypertension, etc."

The research began six years ago when cancer specialist Conzen joined forces with biobehavioral psychologist Martha McClintock, PhD, professor of psychology and founder of the Institute for Mind and Biology at the University of Chicago, who has long been interested in the result of social isolation in aging, to study behavior and cancer in a mouse model.

The University of Chicago scientists took mice that were genetically predisposed to develop mammary gland (breast) cancer and raised them in two environments: in groups of mice and isolated. After the same amount of time, the isolated mice grew larger mammary gland tumors. They were also found to have developed a disrupted stress hormone response.

"I doubted there would be a difference in the growth of the tumors in such a strong model of genetically inherited cancer simply based on chronic stress in their environments, so I was surprised to see a clear, measurable difference both in mammary gland tumor growth and interestingly in accompanying behavior and stress hormone levels," Conzen said.

The researchers then turned their attention to how the chronic social environment affected the biology of cancer growth. In other words, they sought to discover the precise molecular consequences of the stressful environment.

To do this, they studied gene expression in the mouse mammary tissue over time. Conzen and her colleagues found altered expression levels of metabolic pathway genes (which are expected to favor increased tumor growth) in the isolated mice. This was the case even before tumor size differences were measurable.

These altered gene expression patterns suggest potential molecular biomarkers and/or targets for preventive intervention in human breast cancer.

"Given the increased knowledge of the human genome, we can begin to identify and analyze the specific alterations that take place in caner-prone tissues of individuals living in at-risk environments," Conzen said. "That will help us to better understand and implement cancer prevention strategies."

These findings do suggest novel targets for chemoprevention, according to Caryn Lerman, PhD, Scientific Director of the Abramson Cancer Center at the University of Pennsylvania, Philadelphia and Deputy Editor of Cancer Prevention Research. "Future studies should evaluate whether these molecular processes can be reversed by chemopreventive agents."

The findings also support previous epidemiologic studies suggesting that social isolation increases the mortality of chronic diseases, as well as clinical studies revealing that social support improves the outcomes of cancer patients.

Greg Borzo | EurekAlert!
Further information:
http://www.uchospitals.edu

More articles from Health and Medicine:

nachricht New malaria analysis method reveals disease severity in minutes
14.08.2017 | University of British Columbia

nachricht New type of blood cells work as indicators of autoimmunity
14.08.2017 | Instituto de Medicina Molecular

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: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

A Map of the Cell’s Power Station

18.08.2017 | Life Sciences

Engineering team images tiny quasicrystals as they form

18.08.2017 | Physics and Astronomy

Researchers printed graphene-like materials with inkjet

18.08.2017 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>