Immunomodulatory effects of apical papilla cells on periodontal ligament fibroblasts stimulated with Escherichia coli lipopolysaccharide: an in vitro study - Santos, Alexandre Guimarães dos; Spigariol, Karollyne Santos; Santos, Letícia Martin; Sipert, Carla Renata; Holzhausen, Marinella (Journal of Applied Oral Science, 2025)