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Insufficient Sleep Linked to Aggressive Breast Cancers

by Sheela Philomena on August 28, 2012 at 1:49 PM
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 Insufficient Sleep Linked to Aggressive Breast Cancers

Lack of sleep may trigger aggressive form of breast cancers and the likelihood of recurrence, reveals study.

The study, led by Cheryl Thompson, Assistant Professor at Case Western Reserve University School of Medicine, analysed medical records and survey responses from 412 post-menopausal breast cancer patients with Oncotype DX.

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Oncotype DX is a widely utilized test to guide treatment in early stage breast cancer by predicting likelihood of recurrence.

Researchers found that women who reported six hours or less of sleep per night on average before breast cancer diagnosis had increased Oncotype DX tumor recurrence scores.
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"This is the first study to suggest that women who routinely sleep fewer hours may develop more aggressive breast cancers compared with women who sleep longer hours," Dr. Thompson said.

"We found a strong correlation between fewer hours of sleep per night and worse recurrence scores, specifically in post-menopausal breast cancer patients.

This suggests that lack of sufficient sleep may cause more aggressive tumors, but more research will need to be done to verify this finding and understand the causes of this association," she said.

The researchers also revealed that the correlation of sleep duration and recurrence score was strong in post-menopausal women. The data suggested that sleep might affect carcinogenic pathway(s) specifically involved in the development of post-menopausal breast cancer.

This study has been published in Breast Cancer Research and Treatment.

Source: ANI
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