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The Pathologist / Issues / 2015 / Dec / A Crystal Ball for Cancer Spread?
Oncology Oncology

A Crystal Ball for Cancer Spread?

αB-crystallin expression could identify breast cancer patients at risk of developing brain metastasis

By Roisin McGuigan 12/18/2015 1 min read

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Breast cancer is one of the most common sources of brain metastasis (BM), and affects 10-30 percent of patients (1). It goes without saying that this has a significant effect on mortality, and the ability to predict which patients will go on to develop BM could be used to better manage the disease. Now, a team of US researchers have found a biomarker which may help oncologists predict which breast cancers will spread to the brain – αB-crystallin expression. “BM is associated with the shortest survival time compared with other sites of metastatic spread. If, using primary tissues, we can identify a subgroup of patients who may be of higher risk to develop BM, this could potentially be very valuable for clinical management,” says co-leader of the associated study (2), Maggie Cheang.

αB-crystallin expression could identify breast cancer patients at risk of developing brain metastasis Breast cancer is one of the most common sources of brain metastasis (BM), and affects 10-30 percent of patients (1). It goes without saying that this has a significant effect on mortality, and the ability to predict which patients will go on to develop BM could be used to better manage the disease. Now, a team of US researchers have found a biomarker which may help oncologists predict which breast cancers will spread to the brain – αB-crystallin expression. “BM is associated with the shortest survival time compared with other sites of metastatic spread. If, using primary tissues, we can identify a subgroup of patients who may be of higher risk to develop BM, this could potentially be very valuable for clinical management,” says co-leader of the associated study (2), Maggie Cheang.

The researchers analyzed αB-crystallin protein expression in 3,987 specimens from breast cancer patients using immunohistochemistry, and tissue samples were recorded as positive for the protein if there was any staining above background levels. They found that, in women whose cancer had already begun to spread, those who tested positively were around three times more likely to develop BM, and that the protein was also linked with poorer survival rates. A test of this kind could have clear applications in both disease monitoring and management, and in selecting patients for clinical trials. However, it remains unclear whether gene or protein levels of αB-crystallin provide the best predictive power, Cheang warns. “We hope to add αB-crystallin to established clinical trials in metastatic breast cancer to validate our findings. We also plan to see if expression of this protein contributes to BM in other types of solid tumors, like lung cancer and melanoma, which commonly metastasize to the brain,” she says.

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References

  1. MJ Gil-Gil et al., “Breast cancer metastases: a review of the literature and a currently multidisciplinary management guideline”, Clin Trans Oncol, 16, 436–446. PMID: 24277572. KD Voduc et al., “αB-crystallin expression in breast cancer is associated with brain metastasis“, npj Breast Cancer, 1, 15014 (2015).

About the Author(s)

Roisin McGuigan

I have an extensive academic background in the life sciences, having studied forensic biology and human medical genetics in my time at Strathclyde and Glasgow Universities. My research, data presentation and bioinformatics skills plus my ‘wet lab’ experience have been a superb grounding for my role as an Associate Editor at Texere Publishing. The job allows me to utilize my hard-learned academic skills and experience in my current position within an exciting and contemporary publishing company.

More Articles by Roisin McGuigan

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