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Origins of Prostate Cancer Omaha NE

Two studies take significant steps toward solving major mysteries about prostate cancer -- the exact spot in the gland where tumors can originate, and how to distinguish fast-growing malignancies that are life-threatening from the slower-growing kind that can safely be left alone.

Gregory Bocie, MR
(402) 559-5166
987680 Nebraska Medical Ctr
Omaha, NE
Specialties
Oncology (Cancer)
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Male
Education
Graduation Year: 2007

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Saaib Al Shehadat, MD, MRCP
(402) 559-5163
987680 Nebraska Medical Ctr
Omaha, NE
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Oncology (Cancer)
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Male
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Graduation Year: 2007

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Wing C Chan
(402) 559-9800
988095 Nebraska Medical Ctr
Omaha, NE
Specialty
Hematology

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Aparkishor Prakashrao Ganti, MD
(402) 559-6210
987680 Nebraska Medical Ctr
Omaha, NE
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Oncology (Cancer)
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Male
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Medical School: Bj Med Coll, Univ Of Pune, Pune, Maharashtra, India
Graduation Year: 1996

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Philip Jay Bierman, MD
(402) 559-5520
987680 Nebraska Medical Ctr
Omaha, NE
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Medical School: Univ Of Mo-Kansas City Sch Of Med, Kansas City Mo 64108
Graduation Year: 1979

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Robert Bruce Thompson, MD
(402) 552-3844
987521 Nebraska Medical Ctr
Omaha, NE
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Medical School: Univ Of Sd Sch Of Med, Vermillion Sd, 57069
Graduation Year: 1981

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Minnie Abromowitch, MD
(402) 559-7257
982168 Nebraska Medical Ctr
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Medical School: Univ Of Manitoba, Fac Of Med, Winnipeg, Man, Canada
Graduation Year: 1973

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Weining Zhen, MD
(402) 552-3844
987521 Nebraska Medical Ctr
Omaha, NE
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Medical School: Okayama Univ, Fac Of Med, Okayama, Japan
Graduation Year: 1986

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James Olen Armitage, MD
(402) 559-7290
987680 Nebraska Medical Ctr
Omaha, NE
Specialties
Oncology (Cancer), Hematology-Internal Medicine
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Medical School: Univ Of Ne Coll Of Med, Omaha Ne 68198
Graduation Year: 1973
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Hospital: N H S Univ Nebraska Med Ctr, Omaha, Ne
Group Practice: University Medical Associates Univ Of Nebraska Medical Ctr

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Suthida Suwanvecho, MD
Lieo Transplant Building
Omaha, NE
Specialties
Oncology (Cancer)
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Female
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Medical School: Mahidol Univ-Ramathibodi Hosp, Fac Of Med, Bangkok, Thailand
Graduation Year: 1993

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Origins of Prostate Cancer

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WEDNESDAY, Sept. 9 (HealthDay News) -- Two studies take significant steps toward solving major mysteries about prostate cancer -- the exact spot in the gland where tumors can originate, and how to distinguish fast-growing malignancies that are life-threatening from the slower-growing kind that can safely be left alone.

One study, reported in the Sept. 9 online edition of Nature, describes a previously unknown form of prostate stem cell that can become cancerous if genetic controls go haywire. The prostate consists of several layers of cells, with the lowest, the basal layer, playing a supporting role and the luminal layer, just above it, doing the actual work of the gland.

"Up until our paper, it was thought that all the stem cells in the prostate reside in the basal layer," explained study co-author Cory Abate-Shen, a professor of urology, pathology and cell biology at Columbia University's Herbert Irving Comprehensive Cancer Center, in New York City. "We have found a second stem cell population that is luminal rather than basal."

The discovery was made in mice, and the next step is to show that the same kind of stem cells exist in humans. "But this work partially explains how you can have a prostate cancer that is luminal," Abate-Shen said.

The research group already is looking for similar stem cells in human prostate glands. "If we can identify them in humans, we can analyze them molecularly," Abate-Shen said. "We want to do battle with these stem cells."

The mouse work showed that the newly described stem cells can give rise to cancers if the action of a tumor-suppressing gene is lost. That gene is frequently mutated in human prostate cancers.

If the same kind of stem cells are found in human prostate glands, "that would give us a tool to study where and how prostate cancer originates," Abate-Shen said.

The second report, published online Sept. 9 in the Journal of the National Cancer Institute, uncovered an association between infection with a sexually transmitted parasite, Trichomonas vaginalis, and an increased risk of prostate cancer, especially the virulent form of the disease.

"We found an association between serological evidence of Trichomonas infection and prostate cancers that were either advanced at diagnosis or after follow-up proved to be fatal," said lead researcher Jennifer Rider Stark, a postdoctoral fellow at the Harvard School of Public Health.

The finding came from a study that compared 673 men in the long-running Physicians Health Study who had prostate cancer against an equal number of cancer-free participants. A blood test showing infection with the parasite indicated a statistically significant incidence of cancers that were potentially deadly because they spread out of the prostate gland.

Women are routinely screened for T. vaginalis, but men aren't, Rider Stark said. "We often only find out if a man is infected if his female partner has symptoms," she said. "Then we also can treat the male population."

It is possible that screening men for the infection and treating it when it is discovered could reduce the risk of life-threatening prostate cancer, she said. "But it is premature to assume that," Stark said. "We need more population-based studies to confirm that the association actually exists. Until other studies also demonstrate the same association, such measures are a way down the road."

Still, "it's exciting to find a risk factor that is potentially important for prevention," Stark said.

Both findings follow a widely reported study, released earlier this week in the Proceedings of the National Academy of Sciences, that found that a virus called XMRV is strongly related to the more aggressive form of prostate cancer.

More information

Learn about prostate cancer from the U.S. National Cancer Institute.

Author: By Ed Edelson
HealthDay Reporter

SOURCES: Cory Abate-Shen, Ph.D, professor, urology, pathology and cell biology, Columbia University Herbert Irving Comrehensive Cancer Center, New York City; Jennifer Rider Stark, Sc.D., postdoctoral fellow, Harvard School of Public Health, Boston; Sept. 9, 2009, Journal of the National Cancer Institute, online; Sept. 9, 2009, Nature, online

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