C3 and amyotrophic lateral sclerosis: Table 3 demonstrates the CSF concentrations of trophic factors (NGF, BDNF, PDGF-AA, PEDF), angiogenic growth factors (VEGF-A, ANGP-2) and proinflammatory proteins (C3, C4, CRP, complement factor H) in group I and II of the ALS patients 28 days after the LIN- cell administration.