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Nuts to Your Prostate


UPDATE: This post was updated to clarify the amount of whole walnuts the mice were fed each day.

According a press release from the California Walnut Commission, a new study suggests that eating walnuts may reduce a man's risk for prostate cancer. The researchers, led by a team at the University of California, Davis, fed whole walnuts to mice with prostate tumors and found that their tumors shrank about 50 percent, and grew about 30 percent slower than prostate tumors in control mice. The mice were fed a diet that contained 155 grams of whole walnuts per kilogram of total diet, says lead researcher Paul Davis. In human terms, that amounts to about 80 grams of whole walnuts per day.The study, published in the British Journal of Nutrition, shows that the walnut-fed mice had lower levels of prostate cancer biomarker IGF-1, lower levels of LDL cholesterol, and had differences in their liver metabolome compared to controls. "Davis believes that their findings are not a result of one isolated component, but due to the multiple ingredients found in walnuts that work together," the press release says. "Walnuts are a whole food that provides a rich package of healthful substances, including omega-3 fatty acids, gamma tocopherol (a form of vitamin E), polyphenols, and antioxidants. These likely then work synergistically," Davis tells the California Walnut Commission.

The Scan

Interfering With Invasive Mussels

The Chicago Tribune reports that researchers are studying whether RNA interference- or CRISPR-based approaches can combat invasive freshwater mussels.

Participation Analysis

A new study finds that women tend to participate less at scientific meetings but that some changes can lead to increased involvement, the Guardian reports.

Right Whales' Decline

A research study plans to use genetic analysis to gain insight into population decline among North American right whales, according to CBC.

Science Papers Tie Rare Mutations to Short Stature, Immunodeficiency; Present Single-Cell Transcriptomics Map

In Science this week: pair of mutations in one gene uncovered in brothers with short stature and immunodeficiency, and more.