Loss of direct adrenergic innervation after peripheral nerve injury causes lymph node expansion through IFN-γ.
Chien-Sin ChenJasmin WeberStephan Jonas HoltkampLouise Madeleine InceAlba De JuanChen WangLydia Kay LutesColine BarnoudBurak KizilSophia Martina HergenhanJohanna SalvermoserManuel LaschElisabeth DeindlBarbara U SchramlDirk BaumjohannChristoph ScheiermannPublished in: The Journal of experimental medicine (2021)
Peripheral nerve injury can cause debilitating disease and immune cell-mediated destruction of the affected nerve. While the focus has been on the nerve-regenerative response, the effect of loss of innervation on lymph node function is unclear. Here, we show that the popliteal lymph node (popLN) receives direct neural input from the sciatic nerve and that sciatic denervation causes lymph node expansion. Loss of sympathetic, adrenergic tone induces the expression of IFN-γ in LN CD8 T cells, which is responsible for LN expansion. Surgery-induced IFN-γ expression and expansion can be rescued by β2 adrenergic receptor agonists but not sensory nerve agonists. These data demonstrate the mechanisms governing the pro-inflammatory effect of loss of direct adrenergic input on lymph node function.
Keyphrases
- lymph node
- peripheral nerve
- sentinel lymph node
- neoadjuvant chemotherapy
- poor prognosis
- immune response
- dendritic cells
- stem cells
- minimally invasive
- mesenchymal stem cells
- binding protein
- squamous cell carcinoma
- coronary artery disease
- high glucose
- acute coronary syndrome
- endothelial cells
- radiation therapy
- drug induced
- oxidative stress
- machine learning
- tissue engineering