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Scientists study how asbestos fibers trigger cancer in human cells
Date:12/18/2008

COLUMBUS, Ohio Ohio State University scientists believe they are the first in the world to study the molecular underpinnings of cancer by probing individual bonds between an asbestos fiber and human cells.

Though any clinical application is years away, the researchers hope their findings could aid in drug development efforts targeting illnesses caused by excessive exposure to asbestos, including the deadly cancer called mesothelioma.

The researchers use atomic force microscopy to observe how a single asbestos fiber binds with a specific receptor protein on cell surfaces. They suspect that at least one of the more lethal forms of asbestos triggers a cascade of events inside cells that eventually lead to illness, sometimes decades later.

The conditions most commonly associated with long-term exposure to airborne asbestos are lung cancer; asbestosis, a chronic respiratory disease; and mesothelioma, a cancer that forms in the membrane lining most internal organs of the body, including the lungs.

Eric Taylor, a doctoral candidate in earth sciences at Ohio State and a coauthor of the study, describes atomic force microscopy as "Braille on a molecular level," meaning it allows scientists to feel and observe what's happening on molecular surfaces.

"We're looking at what molecules are involved in the chain of events when the fiber touches the cell. Does the binding occur over minutes, or hours? And what processes are triggered?" said Taylor, who presented the research at the American Geophysical Union meeting in San Francisco.

Asbestos comprises six different minerals that naturally occur in both fragment and fibrous forms. Because of its high durability and heat resistance, the fibrous form has been used in many manufacturing products since the late 1800s. Though its use is now highly regulated, asbestos is still present in many materials. The U.S. Department of Labor estimates that 1.3 million employees face signi
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Contact: Eric Taylor
taylor.1317@osu.edu
614-247-8247
Ohio State University
Source:Eurekalert

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