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Other highlights in the June 16 JNCI

Variations in Estrogen Metabolism Genes Do Not Affect Breast Cancer Risk

A new study shows that common mutations in genes that regulate estrogen metabolism are not associated with breast cancer risk.

Several studies have suggested that circulating levels of sex hormones, particularly estrogen, are associated with breast cancer risk, but it is not clear whether changes in the genes that control these levels are associated with breast cancer risk.

Alison M. Dunning, Ph.D., of Cancer Research UK in Cambridge, England, and colleagues looked at common variations, called single nucleotide polymorphisms or SNPs, in genes that regulate estrogen metabolism. They found SNPs in two genes that affected estrogen metabolism. However, there was no association between the common variations in the genes and breast cancer risk.

Contact: Michael Regnier, Cancer Research UK, 44-207-061-8302, michael.regnier@cancer.org.uk

Study Suggests a Possible Target for Treatment of Gastric Cancer

Inhibition of hypoxia-inducible factor 1alpha (HIF-1alpha) activity reduces angiogenesis, vessel maturation, and tumor growth in gastric cancer cells, according to a new study. The authors suggest that HIF-1alpha may be a target for future gastric cancer treatments.

HIF-1 controls expression of vascular endothelial growth factor (VEGF), which contributes to tumor angiogenesis. Overexpression of HIF-1alpha, a subunit of HIF-1, is associated with tumor angiogenesis and tumor cell proliferation. Lee M. Ellis, M.D., of the University of Texas M. D. Anderson Cancer Center in Houston, and colleagues examined the effects of inhibiting HIF-1alpha on VEGF expression and angiogenesis and tumor growth in human gastric cancer.

They found that inhibition of HIF-1alpha activity decreased angiogenesis and the growth of human gastric cancer cells, which suggests that HIF-1alpha could be a va
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Contact: Sarah L. Zielinski
jncimedia@oupjournals.org
301-841-1287
Journal of the National Cancer Institute
15-Jun-2004


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