压力为何会诱发湿疹？复旦大学最新Science论文，揭开背后的原因，并带来治疗新思路

Core Viewpoint - The research from Fudan University reveals a neural network that activates immune cells in the skin under stress, exacerbating eczema symptoms, providing a potential target for new eczema therapies [3][4][9] Group 1: Research Findings - The study identifies a specific neuroimmune mechanism linking psychological stress to the exacerbation of atopic dermatitis (AD), affecting over 200 million people globally [4] - The research highlights the importance of the Pdyn+ sympathetic neuron-eosinophil axis as a critical interface between the brain and skin inflammation [4][9] - Stress hormones can directly damage the skin barrier, promote inflammation, and enhance itching, creating a vicious cycle of inflammation and psychological distress [5] Group 2: Mechanisms of Action - The study found a specific association between stress-induced eosinophil increase and the severity of skin inflammation in AD patients [6] - Genetic deletion of eosinophils in a mouse model prevented stress-induced exacerbation of dermatitis, indicating the role of the peripheral sympathetic-pituitary-adrenal axis in mediating stress-induced skin inflammation [6][7] - Pdyn+ sympathetic neurons, rather than Npy+ neurons, are necessary and sufficient for driving stress-induced dermatitis and eosinophilia [7] Group 3: Implications for Treatment - The findings suggest that stress-induced eosinophilia may serve as a potential biomarker for the severity of atopic dermatitis [9] - Targeting the Pdyn+ sympathetic neuron-eosinophil regulatory axis could help alleviate the inflammatory aftermath triggered by psychological stress [9]