Depression: Genetic Predisposition and Family History
Depression can run in families, but not in the way eye color or height do. What’s inherited is not a single “depression gene,” but a constellation of biological sensitivities — how the brain regulates mood, how stress hormones surge and settle, how sleep and appetite respond to change. These tendencies can make some people more vulnerable when life’s pressures mount. What It Is Genetic predisposition means that certain patterns in DNA influence how neurotransmitters like serotonin and dopamine function, how the hypothalamic–pituitary–adrenal (HPA) axis manages stress, and how inflammation interacts with mood. Family history adds another layer: shared environments, learned coping styles, and emotional modeling. A parent’s way of handling despair or anxiety can become part of a child’s internal script. How It Contributes to Depression When biology and family experience intertwine, the threshold for depression can lower. A person may inherit a nervous system that reacts strongly to ...