An unofficial blog about the National Museum of Health and Medicine (nee the Army Medical Museum) in Silver Spring, MD. Visit for news about the museum, new projects, musing on the history of medicine and neat pictures.
Monday, February 25, 2008
Higher Rates of Breast Cancer Linked to Nighttime Lights
The Washington Post published a story last week reporting on the work of researchers in Israel. The scientists "overlaid satellite images of Earth onto cancer registries" and found that women who live in neighborhoods that have a lot of nighttime light, or those who work the graveyard shift, such as nurses and flight attendants, have a greater risk for breast cancer - as much as 60 percent higher. The key may be a lack of melatonin which is produced primarily at night; however, production of melatonin drops when light is present, especially light on the blue end of the spectrum, such as that from computer screens and fluorescent lights.
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BrainyGirl said...
Very interesting stuff. I wonder how much of a risk reduction we would see if night workers started taking melatonin supplements.
Good question, and it's addressed in the article: "In keeping with the melatonin hypothesis, mice in cages with night lighting have normal cancer rates if they get shots of the hormone. And blind women, whose eyes cannot detect light and so have robust production of melatonin, have lower-than-average breast cancer rates."
Like you, I think this is really interesting.
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