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Charred Meat Chemical May Lead To Prostate Cancer

Date:
April 6, 2006
Source:
Johns Hopkins Kimmel Cancer Center
Summary:
The compound PhIP -- formed by cooking meats at very high temperatures -- acts as both an initiator and promoter of prostate cancer in rats, according to a Johns Hopkins Kimmel Cancer Center study, presented at the 97th annual meeting of the American Association for Cancer Research in Washington, D.C.

The compound PhIP (2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine), formed by cooking meats at very high temperatures, acts as both an initiator and promoter of prostate cancer in rats, according to a Johns Hopkins Kimmel Cancer Center study, presented at the 97th annual meeting of the American Association for Cancer Research in Washington, D.C.

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Previous research in rats has shown that PhIP causes early prostate cancer lesions only in the front of the organ called the ventral lobe, and not in other lobes. To begin to unravel why these pre-cancers congregate in this area, Yatsutomo Nakai, lead author on the study, mixed PhIP into food given to a group of rats for up to eight weeks, then studied the animals’ prostates, intestines and spleens to look for genetic mutations. After four weeks, all lobes had significantly elevated mutations compared to rats that did not ingest PhIP. After eight weeks, researchers observed a significant increase in proliferation only in the ventral lobe, indicating that PhIP caused additional “promotional” events only in that lobe.

Researchers also observed in that lobe alone an increase in inflammatory mast cells and macrophages, suggesting that these cells may contribute to the development of prostate cancer.

“We stumbled across a new potential interaction between ingestion of cooked meat in the diet and cancer in the rat,” says coauthor Angelo De Marzo, M.D., senior author of the study and an associate professor of pathology, urology and oncology. “For humans, the biggest problem is that it’s extremely difficult to tell how much PhIP you’ve ingested, since different amounts are formed depending on cooking conditions.”

Coauthors were Jessica L. Hicks and William G. Nelson.


Story Source:

The above story is based on materials provided by Johns Hopkins Kimmel Cancer Center. Note: Materials may be edited for content and length.


Cite This Page:

Johns Hopkins Kimmel Cancer Center. "Charred Meat Chemical May Lead To Prostate Cancer." ScienceDaily. ScienceDaily, 6 April 2006. <www.sciencedaily.com/releases/2006/04/060406101252.htm>.
Johns Hopkins Kimmel Cancer Center. (2006, April 6). Charred Meat Chemical May Lead To Prostate Cancer. ScienceDaily. Retrieved October 25, 2014 from www.sciencedaily.com/releases/2006/04/060406101252.htm
Johns Hopkins Kimmel Cancer Center. "Charred Meat Chemical May Lead To Prostate Cancer." ScienceDaily. www.sciencedaily.com/releases/2006/04/060406101252.htm (accessed October 25, 2014).

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