压力导致脱发的双重机制发现

Core Insights - The research from Harvard University reveals a dual mechanism by which stress leads to hair loss, providing new insights into autoimmune diseases [1] Group 1: Mechanism of Hair Loss - The first mechanism identified is "immediate hair loss," triggered by the sympathetic nervous system's response to stress, resulting in the release of high levels of norepinephrine, which can kill rapidly proliferating cells in hair follicles [1] - The second mechanism involves the destruction of hair follicles by norepinephrine, which leads the body to perceive the damaged tissue as foreign, triggering an immune response that activates CD8+ T cells to attack hair follicles, potentially causing recurrent hair loss with lasting effects [1] Group 2: Implications for Autoimmune Diseases - This discovery is significant for understanding autoimmune diseases, as conditions like type 1 diabetes, lupus, and multiple sclerosis often require external triggers, with stress potentially being one of them [1]