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Early predictor of breast cancer aggressiveness
June 24, 2004Physicians may be able to make early decisions on the best treatment for breast cancer, thanks to research published in Breast Cancer Research today. A gene involved in the adhesion of cells is less active in breast tumors with a poor prognosis than those that are less aggressive, researchers found.
Measuring the activity of the ALCAM gene in primary breast tumors could give physicians advanced warning about the likely clinical outcome of the disease. This should help them decide whether to prescribe a more aggressive treatment regimen, such as chemotherapy, much earlier in the diagnostic process.
Dr Judy King and colleagues, from University of South Alabama and University of Wales College of Medicine, compared the expression of the gene for the Activated Leukocyte Cell Adhesion Molecule (ALCAM) in normal breast tissue and tissue samples from primary breast tumors. To do this they counted the number of mRNA transcripts of the ALCAM gene in the different samples.
The researchers found that the ALCAM gene was significantly less active in higher-grade tumors compared to lower-grade tumors, and in tumors with a worse prognosis compared to those with a better prognosis.
"Tumors from patients who died of breast cancer had significantly lower levels of ALCAM transcripts than those with primary tumors but no metastatic disease or local recurrence," write the researchers.
They continue: "The data clearly suggest that decreased ALCAM expression in the primary tumor is of clinical significance in breast cancer, and that reduced expression indicates a more aggressive phenotype and poor prognosis."
They suggest that quantitative PCR, to measure the number of ALCAM transcripts in a tissue sample from a primary breast tumor, could be used to identify these more aggressive tumors at an early stage.
As ALCAM is involved in keeping cells together in a clump, the researchers hypothesize that reduced expression of the gene might allow the tumor cells to separate from one another. This would allow cells to enter the circulation and promote the formation of secondary tumors, which makes the cancer harder to treat.
BioMed Central Limited
Breast Cancer News and Current Breast Cancer Events RSSM. D. Anderson study finds change in HER2 status after treatment with Herceptin
Researchers at The University of Texas M. D. Anderson Cancer Center have discovered that when treated with Herceptin prior to surgery, 50 percent of HER2 positive, breast cancer patients showed no signs of disease at the time of surgery.
M. D. Anderson study finds racial disparities in radiation therapy rates for breast cancer
Black women are less likely than white women to receive radiation therapy after a lumpectomy, the standard of care for early stage breast cancer, according to a new study by researchers at The University of Texas M. D. Anderson Cancer Center.
New nano device detects immune system cell signaling
Scientists have detected previously unnoticed chemical signals that individual cells in the immune system use to communicate with each other over short distances.
CSHL scientists identify new drug target against virulent type of breast cancer
Tumor cells in a particular subset of breast cancer patients churn out too much of a protein called ErbB2 -- also often called HER2 -- which drives the cells to proliferate unchecked. Patients unlucky enough to be in this group -- about one in four -- have poorer prognoses and clinical outcomes than those who don't.
Dense tissue promotes aggressive cancers
New research may explain why breast cancer tends to be more aggressive in women with denser breast tissue. Breast cancer cells grown in dense, rigid surroundings step up their invasive activities, Vanderbilt-Ingram Cancer Center investigators report in the Sept. 9 issue of Current Biology.
Women exposed to negative life events at greater risk of breast cancer: BGU study
Happiness and optimism may play a role against breast cancer while adverse life events can increase the risk of developing the disease.
Hormone replacement therapy improves sleep, sexuality and joint pain in older women
One of the world's longest and largest trials of hormone replacement therapy (HRT) has found that post-menopausal women on HRT gain significant improvements in quality of life.
Positive thinking may protect against breast cancer
Feelings of happiness and optimism play a positive role against breast cancer. Research published today in the open access journal BMC Cancer suggests that while staying positive has a protective role, adverse life events such as the loss of a parent or close relative, divorce or the loss of a spouse can increase a woman's risk of developing the disease.
Anti-tumor effects are enhanced by inhibiting 2 pathways rather than 1
Two independent research groups have found that simultaneous inhibition of two signaling pathways resulted in substantially enhanced antitumor effects in mouse models of prostate and breast cancer. In an accompany commentary, Steven Grant, at Virginia Commonwealth University Health Science Center, Richmond, discusses the clinical importance of these studies and highlights some of the questions that still need to be answered.
Why a common treatment for prostate cancer ultimately fails
Some of the drugs given to many men during their fight against prostate cancer can actually spur some cancer cells to grow, researchers have found. The findings were published online this week in a pair of papers in the Proceedings of the National Academy of Sciences.
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