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New research model of human prostate cancer shows cancer development
Date:7/1/2010

Progress toward understanding the role of sex hormones in the growth of prostate cancerthe most common cancer in U.S. menhas been hindered by the lack of a suitable laboratory research model. Now researchers say they have developed the first model of hormone-induced human prostate cancer initiation and progression.

Their results were presented at The Endocrine Society's 92nd Annual Meeting in San Diego.

"We hope this model will speed up the process of testing preventive therapies for prostate cancer as well as help clarify the hormonal mechanisms in the development of this cancer," said Gail Prins, PhD, a professor and reproductive physiologist at the University of Illinois at Chicago, who is a co-author of the study.

"Sex hormonestestosterone and estrogensare involved in regulating the growth of prostate cancer, but the mechanisms are not well established," Prins said.

Currently the only available laboratory models of human prostate cancer are xenograftscancerous human tissues grafted under the skin of animalsor "transformed" cancer cell lines containing cells that originally came from patients with prostate cancer. However, Prins said, "If you want to study the initial development of cancereither naturally or inducedor its prevention, you cannot use a model of existing cancer, such as transformed cell lines."

To study the progression of prostate cancer from normal cells into cancerous cells requires the use of animal prostate cells. Animal models, however, do not directly mimic all aspects of human prostate cancer, experts say.

Prins and her colleagues created their model using prostate cells obtained from a deceased organ donor who did not have prostate disease. They isolated and grew, in 3-D culture, adult prostate progenitor cellscells with stem cell-like properties that self-renew and may become cancerous. In 3-D culture, the progenitor cells proliferate and form small spheroids, called prostasphere
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Contact: Aaron Lohr
alohr@endo-society.org
240-482-1380
The Endocrine Society
Source:Eurekalert

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