The NGFβ and NRG-1β concentrations were shown to be significantly higher in the total group of SLE patients (median [Q1–Q3]: 3.6 [1.3–4.5] and 52.5 [8.5–148], respectively) compared with the healthy individuals (2.9 [1.3–3.4] and 13.7 [4.4–42] ng/mL, respectively). Here, NGF is linked to systemic lupus erythematosus.