Breast cancer can be broadly separated into hormone-responsive (ER-positive) and non-hormone-responsive (ER-negative) subtypes.

乳腺癌可以大致被分类为雌激素受体阳性与雌激素受体阴性两类。

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Researchers thought that only hormone-responsive breast cancers would be affected by breast-feeding.

NPR: Study: Breast-Feeding Decreases Cancer Risk

The FDA approved the new treatment for about 20 percent of breast cancer patients with a form of the disease that is typically more aggressive and less responsive to hormone therapy.

NPR: FDA Approves New Targeted Breast Cancer Drug

The animals also became more responsive to the hormone insulin, which controls the way the body uses sugar.

BBC: Type of body fat 'boosts health'