Targeting the inflamed paraventricular hypothalamic-bone marrow axis rejuvenates lymphopoiesis in aged mice
This study reveals that aging-induced inflammation in paraventricular hypothalamic neurons disrupts the brain–bone marrow axis to impair lymphopoiesis, and demonstrates that chemogenetically inhibiting these neurons or ablating their TLR4 receptors can rejuvenate immune function and improve vaccine responses in aged mice.