Lithium had no significant effect on RNA expression of neurotrophic factors CNTF, GDNF, LIF, NGFβ, NGFγ and NT-3 in rat primary neural precursor cells. Rat primary neural precursor cells were treated with 3 mM LiCl or control NaCl for 3 days. Then the cells were lysed for RNA extraction and subsequent quantitative real time PCR analysis. RNA levels of neurotrophic factors were normalized to peptidylprolyl isomerase A (Ppia). The data represent mean ± standard error. *: Bonferroni/Dunn, P < 0.05, n = 3 for each condition.