TGFB1 and tetanus: Perfusion with TGF-β1 (10 ng/ml) before a strong tetanus did not affect potentiation (n = 6/6; 197.02 ± 11.34 vs. 187.52 ± 20.60% of baseline slope 120 min after tetanus in vehicle-treated tetanized slices; ANOVA for repeated measures of the post-tetanic time points: F(1,10) = 0.002, p = 0.962; Fig. 1c).